/* PowerPC64-specific support for 64-bit ELF.
- Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
Written by Linus Nordberg, Swox AB <info@swox.com>,
based on elf32-ppc.c by Ian Lance Taylor.
+ Largely rewritten by Alan Modra <amodra@bigpond.net.au>
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
-/* This file is based on the 64-bit PowerPC ELF ABI. It is also based
- on the file elf32-ppc.c. */
-#include "bfd.h"
+/* The 64-bit PowerPC ELF ABI may be found at
+ http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
+ http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
+
#include "sysdep.h"
+#include <stdarg.h>
+#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ppc64.h"
#include "elf64-ppc.h"
-static void ppc_howto_init
- PARAMS ((void));
-static reloc_howto_type *ppc64_elf_reloc_type_lookup
- PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-static void ppc64_elf_info_to_howto
- PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst));
static bfd_reloc_status_type ppc64_elf_ha_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
+static bfd_reloc_status_type ppc64_elf_branch_reloc
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_brtaken_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_sectoff_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_toc_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_toc64_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_unhandled_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static bfd_boolean ppc64_elf_object_p
- PARAMS ((bfd *));
-static bfd_boolean ppc64_elf_merge_private_bfd_data
- PARAMS ((bfd *, bfd *));
-static bfd_boolean ppc64_elf_new_section_hook
- PARAMS ((bfd *, asection *));
-
+ (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
+static bfd_vma opd_entry_value
+ (asection *, bfd_vma, asection **, bfd_vma *);
#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
#define TARGET_LITTLE_NAME "elf64-powerpcle"
#define ELF_ARCH bfd_arch_powerpc
#define ELF_MACHINE_CODE EM_PPC64
#define ELF_MAXPAGESIZE 0x10000
+#define ELF_COMMONPAGESIZE 0x1000
#define elf_info_to_howto ppc64_elf_info_to_howto
#define elf_backend_want_got_sym 0
#define elf_backend_want_plt_sym 0
#define elf_backend_plt_alignment 3
#define elf_backend_plt_not_loaded 1
-#define elf_backend_got_symbol_offset 0
#define elf_backend_got_header_size 8
-#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_rela_normal 1
+#define elf_backend_default_execstack 0
+#define bfd_elf64_mkobject ppc64_elf_mkobject
#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
+#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
+#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
#define elf_backend_object_p ppc64_elf_object_p
+#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
+#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
+#define elf_backend_write_core_note ppc64_elf_write_core_note
#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
+#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
+#define elf_backend_check_directives ppc64_elf_check_directives
+#define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
+#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
#define elf_backend_check_relocs ppc64_elf_check_relocs
+#define elf_backend_gc_keep ppc64_elf_gc_keep
+#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
#define elf_backend_hide_symbol ppc64_elf_hide_symbol
#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
+#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
+#define elf_backend_action_discarded ppc64_elf_action_discarded
#define elf_backend_relocate_section ppc64_elf_relocate_section
#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
+#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
+#define elf_backend_special_sections ppc64_elf_special_sections
/* The name of the dynamic interpreter. This is put in the .interp
section. */
/* .plt call stub instructions. The normal stub is like this, but
sometimes the .plt entry crosses a 64k boundary and we need to
- insert an addis to adjust r12. */
+ insert an addi to adjust r12. */
#define PLT_CALL_STUB_SIZE (7*4)
#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
-#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
+#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
/* ld %r11,xxx+16@l(%r12) */
#define BCTR 0x4e800420 /* bctr */
+#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
+#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
+#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
+#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
+
#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
-/* glink call stub instructions. We enter with the index in R0, and the
- address of glink entry in CTR. From that, we can calculate PLT0. */
+/* glink call stub instructions. We enter with the index in R0. */
#define GLINK_CALL_STUB_SIZE (16*4)
-#define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
-#define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
-#define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
-#define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
-#define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
-#define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
-#define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
- /* sub %r12,%r12,%r11 */
-#define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
-#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
- /* ld %r11,xxx@l(%r12) */
-#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
- /* ld %r2,8(%r12) */
- /* mtctr %r11 */
- /* ld %r11,16(%r12) */
- /* bctr */
+ /* 0: */
+ /* .quad plt0-1f */
+ /* __glink: */
+#define MFLR_R12 0x7d8802a6 /* mflr %12 */
+#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
+ /* 1: */
+#define MFLR_R11 0x7d6802a6 /* mflr %11 */
+#define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
+#define MTLR_R12 0x7d8803a6 /* mtlr %12 */
+#define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
+ /* ld %11,0(%12) */
+ /* ld %2,8(%12) */
+ /* mtctr %11 */
+ /* ld %11,16(%12) */
+ /* bctr */
/* Pad with this. */
#define NOP 0x60000000
#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
-/* Instructions to save and restore floating point regs. */
+/* Instructions used by the save and restore reg functions. */
+#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
+#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
+#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
+#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
+#define LI_R12_0 0x39800000 /* li %r12,0 */
+#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
+#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
+#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
#define BLR 0x4e800020 /* blr */
/* Since .opd is an array of descriptors and each entry will end up
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_branch_reloc, /* special_function */
"R_PPC64_ADDR14", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_branch_reloc, /* special_function */
"R_PPC64_REL24", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc64_elf_branch_reloc, /* special_function */
"R_PPC64_REL14", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
/* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
/* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
- HOWTO (R_PPC64_PLTGOT16_DS, /* type */
+ HOWTO (R_PPC64_PLTGOT16_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
be done. */
static void
-ppc_howto_init ()
+ppc_howto_init (void)
{
unsigned int i, type;
}
static reloc_howto_type *
-ppc64_elf_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
+ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
enum elf_ppc64_reloc_type r = R_PPC64_NONE;
/* Initialize howto table if needed. */
ppc_howto_init ();
- switch ((int) code)
+ switch (code)
{
default:
- return (reloc_howto_type *) NULL;
+ return NULL;
case BFD_RELOC_NONE: r = R_PPC64_NONE;
break;
break;
}
- return ppc64_elf_howto_table[(int) r];
+ return ppc64_elf_howto_table[r];
};
+static reloc_howto_type *
+ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
+ i++)
+ if (ppc64_elf_howto_raw[i].name != NULL
+ && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
+ return &ppc64_elf_howto_raw[i];
+
+ return NULL;
+}
+
/* Set the howto pointer for a PowerPC ELF reloc. */
static void
-ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
+ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
{
unsigned int type;
ppc_howto_init ();
type = ELF64_R_TYPE (dst->r_info);
- BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
- / sizeof (ppc64_elf_howto_table[0])));
+ if (type >= (sizeof (ppc64_elf_howto_table)
+ / sizeof (ppc64_elf_howto_table[0])))
+ {
+ (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
+ abfd, (int) type);
+ type = R_PPC64_NONE;
+ }
cache_ptr->howto = ppc64_elf_howto_table[type];
}
/* Handle the R_PPC64_ADDR16_HA and similar relocs. */
static bfd_reloc_status_type
-ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
/* If this is a relocatable link (output_bfd test tells us), just
call the generic function. Any adjustment will be done at final
}
static bfd_reloc_status_type
-ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
+{
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+
+ if (strcmp (symbol->section->name, ".opd") == 0
+ && (symbol->section->owner->flags & DYNAMIC) == 0)
+ {
+ bfd_vma dest = opd_entry_value (symbol->section,
+ symbol->value + reloc_entry->addend,
+ NULL, NULL);
+ if (dest != (bfd_vma) -1)
+ reloc_entry->addend = dest - (symbol->value
+ + symbol->section->output_section->vma
+ + symbol->section->output_offset);
+ }
+ return bfd_reloc_continue;
+}
+
+static bfd_reloc_status_type
+ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
long insn;
enum elf_ppc64_reloc_type r_type;
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
insn &= ~(0x01 << 21);
- r_type = (enum elf_ppc64_reloc_type) reloc_entry->howto->type;
+ r_type = reloc_entry->howto->type;
if (r_type == R_PPC64_ADDR14_BRTAKEN
|| r_type == R_PPC64_REL14_BRTAKEN)
insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
else if ((insn & (0x14 << 21)) == (0x10 << 21))
insn |= 0x08 << 21;
else
- return bfd_reloc_continue;
+ goto out;
}
else
{
if ((bfd_signed_vma) (target - from) < 0)
insn ^= 0x01 << 21;
}
- bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
- return bfd_reloc_continue;
+ bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
+ out:
+ return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
}
static bfd_reloc_status_type
-ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
/* If this is a relocatable link (output_bfd test tells us), just
call the generic function. Any adjustment will be done at final
}
static bfd_reloc_status_type
-ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
/* If this is a relocatable link (output_bfd test tells us), just
call the generic function. Any adjustment will be done at final
}
static bfd_reloc_status_type
-ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
bfd_vma TOCstart;
}
static bfd_reloc_status_type
-ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
bfd_vma TOCstart;
}
static bfd_reloc_status_type
-ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
bfd_vma TOCstart;
bfd_size_type octets;
}
static bfd_reloc_status_type
-ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+ void *data, asection *input_section,
+ bfd *output_bfd, char **error_message)
{
/* If this is a relocatable link (output_bfd test tells us), just
call the generic function. Any adjustment will be done at final
return bfd_reloc_dangerous;
}
+struct ppc64_elf_obj_tdata
+{
+ struct elf_obj_tdata elf;
+
+ /* Shortcuts to dynamic linker sections. */
+ asection *got;
+ asection *relgot;
+
+ /* Used during garbage collection. We attach global symbols defined
+ on removed .opd entries to this section so that the sym is removed. */
+ asection *deleted_section;
+
+ /* TLS local dynamic got entry handling. Suppose for multiple GOT
+ sections means we potentially need one of these for each input bfd. */
+ union {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } tlsld_got;
+
+ /* A copy of relocs before they are modified for --emit-relocs. */
+ Elf_Internal_Rela *opd_relocs;
+};
+
+#define ppc64_elf_tdata(bfd) \
+ ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
+
+#define ppc64_tlsld_got(bfd) \
+ (&ppc64_elf_tdata (bfd)->tlsld_got)
+
+#define is_ppc64_elf(bfd) \
+ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
+ && elf_object_id (bfd) == PPC64_ELF_TDATA)
+
+/* Override the generic function because we store some extras. */
+
+static bfd_boolean
+ppc64_elf_mkobject (bfd *abfd)
+{
+ return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
+ PPC64_ELF_TDATA);
+}
+
/* Fix bad default arch selected for a 64 bit input bfd when the
default is 32 bit. */
static bfd_boolean
-ppc64_elf_object_p (abfd)
- bfd *abfd;
+ppc64_elf_object_p (bfd *abfd)
{
if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
{
return TRUE;
}
+/* Support for core dump NOTE sections. */
+
+static bfd_boolean
+ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+ size_t offset, size;
+
+ if (note->descsz != 504)
+ return FALSE;
+
+ /* pr_cursig */
+ elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
+
+ /* pr_pid */
+ elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
+
+ /* pr_reg */
+ offset = 112;
+ size = 384;
+
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ size, note->descpos + offset);
+}
+
+static bfd_boolean
+ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+ if (note->descsz != 136)
+ return FALSE;
+
+ elf_tdata (abfd)->core_program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
+ elf_tdata (abfd)->core_command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
+
+ return TRUE;
+}
+
+static char *
+ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
+ ...)
+{
+ switch (note_type)
+ {
+ default:
+ return NULL;
+
+ case NT_PRPSINFO:
+ {
+ char data[136];
+ va_list ap;
+
+ va_start (ap, note_type);
+ memset (data, 0, 40);
+ strncpy (data + 40, va_arg (ap, const char *), 16);
+ strncpy (data + 56, va_arg (ap, const char *), 80);
+ va_end (ap);
+ return elfcore_write_note (abfd, buf, bufsiz,
+ "CORE", note_type, data, sizeof (data));
+ }
+
+ case NT_PRSTATUS:
+ {
+ char data[504];
+ va_list ap;
+ long pid;
+ int cursig;
+ const void *greg;
+
+ va_start (ap, note_type);
+ memset (data, 0, 112);
+ pid = va_arg (ap, long);
+ bfd_put_32 (abfd, pid, data + 32);
+ cursig = va_arg (ap, int);
+ bfd_put_16 (abfd, cursig, data + 12);
+ greg = va_arg (ap, const void *);
+ memcpy (data + 112, greg, 384);
+ memset (data + 496, 0, 8);
+ va_end (ap);
+ return elfcore_write_note (abfd, buf, bufsiz,
+ "CORE", note_type, data, sizeof (data));
+ }
+ }
+}
+
/* Merge backend specific data from an object file to the output
object file when linking. */
static bfd_boolean
-ppc64_elf_merge_private_bfd_data (ibfd, obfd)
- bfd *ibfd;
- bfd *obfd;
+ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
/* Check if we have the same endianess. */
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
const char *msg;
if (bfd_big_endian (ibfd))
- msg = _("%s: compiled for a big endian system and target is little endian");
+ msg = _("%B: compiled for a big endian system "
+ "and target is little endian");
else
- msg = _("%s: compiled for a little endian system and target is big endian");
+ msg = _("%B: compiled for a little endian system "
+ "and target is big endian");
- (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
+ (*_bfd_error_handler) (msg, ibfd);
bfd_set_error (bfd_error_wrong_format);
return FALSE;
return TRUE;
}
+/* Add extra PPC sections. */
+
+static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
+{
+ { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
+ { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { NULL, 0, 0, 0, 0 }
+};
+
+enum _ppc64_sec_type {
+ sec_normal = 0,
+ sec_opd = 1,
+ sec_toc = 2
+};
+
struct _ppc64_elf_section_data
{
struct bfd_elf_section_data elf;
- /* An array with one entry for each opd function descriptor. */
union
{
- /* Points to the function code section for local opd entries. */
- asection **func_sec;
- /* After editing .opd, adjust references to opd local syms. */
- long *adjust;
- } opd;
-
- /* An array for toc sections, indexed by offset/8.
- Specifies the relocation symbol index used at a given toc offset. */
- unsigned *t_symndx;
+ /* An array with one entry for each opd function descriptor. */
+ struct _opd_sec_data
+ {
+ /* Points to the function code section for local opd entries. */
+ asection **func_sec;
+
+ /* After editing .opd, adjust references to opd local syms. */
+ long *adjust;
+ } opd;
+
+ /* An array for toc sections, indexed by offset/8.
+ Specifies the relocation symbol index used at a given toc offset. */
+ unsigned *t_symndx;
+ } u;
+
+ enum _ppc64_sec_type sec_type:2;
+
+ /* Flag set when small branches are detected. Used to
+ select suitable defaults for the stub group size. */
+ unsigned int has_14bit_branch:1;
};
#define ppc64_elf_section_data(sec) \
((struct _ppc64_elf_section_data *) elf_section_data (sec))
static bfd_boolean
-ppc64_elf_new_section_hook (abfd, sec)
- bfd *abfd;
- asection *sec;
+ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
{
- struct _ppc64_elf_section_data *sdata;
- bfd_size_type amt = sizeof (*sdata);
+ if (!sec->used_by_bfd)
+ {
+ struct _ppc64_elf_section_data *sdata;
+ bfd_size_type amt = sizeof (*sdata);
- sdata = (struct _ppc64_elf_section_data *) bfd_zalloc (abfd, amt);
- if (sdata == NULL)
- return FALSE;
- sec->used_by_bfd = (PTR) sdata;
+ sdata = bfd_zalloc (abfd, amt);
+ if (sdata == NULL)
+ return FALSE;
+ sec->used_by_bfd = sdata;
+ }
return _bfd_elf_new_section_hook (abfd, sec);
}
+
+static struct _opd_sec_data *
+get_opd_info (asection * sec)
+{
+ if (sec != NULL
+ && ppc64_elf_section_data (sec) != NULL
+ && ppc64_elf_section_data (sec)->sec_type == sec_opd)
+ return &ppc64_elf_section_data (sec)->u.opd;
+ return NULL;
+}
\f
-/* The following functions are specific to the ELF linker, while
- functions above are used generally. Those named ppc64_elf_* are
- called by the main ELF linker code. They appear in this file more
- or less in the order in which they are called. eg.
- ppc64_elf_check_relocs is called early in the link process,
- ppc64_elf_finish_dynamic_sections is one of the last functions
- called.
+/* Parameters for the qsort hook. */
+static asection *synthetic_opd;
+static bfd_boolean synthetic_relocatable;
- PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
- functions have both a function code symbol and a function descriptor
- symbol. A call to foo in a relocatable object file looks like:
+/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
- . .text
- . x:
- . bl .foo
- . nop
+static int
+compare_symbols (const void *ap, const void *bp)
+{
+ const asymbol *a = * (const asymbol **) ap;
+ const asymbol *b = * (const asymbol **) bp;
- The function definition in another object file might be:
+ /* Section symbols first. */
+ if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
+ return -1;
+ if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
+ return 1;
- . .section .opd
- . foo: .quad .foo
- . .quad .TOC.@tocbase
- . .quad 0
- .
- . .text
- . .foo: blr
+ /* then .opd symbols. */
+ if (a->section == synthetic_opd && b->section != synthetic_opd)
+ return -1;
+ if (a->section != synthetic_opd && b->section == synthetic_opd)
+ return 1;
- When the linker resolves the call during a static link, the branch
- unsurprisingly just goes to .foo and the .opd information is unused.
- If the function definition is in a shared library, things are a little
- different: The call goes via a plt call stub, the opd information gets
- copied to the plt, and the linker patches the nop.
+ /* then other code symbols. */
+ if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
+ == (SEC_CODE | SEC_ALLOC)
+ && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
+ != (SEC_CODE | SEC_ALLOC))
+ return -1;
- . x:
- . bl .foo_stub
- . ld 2,40(1)
- .
- .
- . .foo_stub:
- . addis 12,2,Lfoo@toc@ha # in practice, the call stub
- . addi 12,12,Lfoo@toc@l # is slightly optimized, but
- . std 2,40(1) # this is the general idea
- . ld 11,0(12)
- . ld 2,8(12)
- . mtctr 11
- . ld 11,16(12)
- . bctr
- .
- . .section .plt
- . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
+ if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
+ != (SEC_CODE | SEC_ALLOC)
+ && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
+ == (SEC_CODE | SEC_ALLOC))
+ return 1;
- The "reloc ()" notation is supposed to indicate that the linker emits
- an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
- copying.
+ if (synthetic_relocatable)
+ {
+ if (a->section->id < b->section->id)
+ return -1;
- What are the difficulties here? Well, firstly, the relocations
- examined by the linker in check_relocs are against the function code
- sym .foo, while the dynamic relocation in the plt is emitted against
- the function descriptor symbol, foo. Somewhere along the line, we need
- to carefully copy dynamic link information from one symbol to the other.
- Secondly, the generic part of the elf linker will make .foo a dynamic
- symbol as is normal for most other backends. We need foo dynamic
- instead, at least for an application final link. However, when
- creating a shared library containing foo, we need to have both symbols
- dynamic so that references to .foo are satisfied during the early
- stages of linking. Otherwise the linker might decide to pull in a
- definition from some other object, eg. a static library. */
+ if (a->section->id > b->section->id)
+ return 1;
+ }
-/* The linker needs to keep track of the number of relocs that it
- decides to copy as dynamic relocs in check_relocs for each symbol.
- This is so that it can later discard them if they are found to be
- unnecessary. We store the information in a field extending the
- regular ELF linker hash table. */
+ if (a->value + a->section->vma < b->value + b->section->vma)
+ return -1;
-struct ppc_dyn_relocs
-{
- struct ppc_dyn_relocs *next;
+ if (a->value + a->section->vma > b->value + b->section->vma)
+ return 1;
- /* The input section of the reloc. */
- asection *sec;
+ /* For syms with the same value, prefer strong dynamic global function
+ syms over other syms. */
+ if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
+ return -1;
- /* Total number of relocs copied for the input section. */
- bfd_size_type count;
+ if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
+ return 1;
- /* Number of pc-relative relocs copied for the input section. */
- bfd_size_type pc_count;
-};
+ if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
+ return -1;
-/* Track GOT entries needed for a given symbol. We might need more
- than one got entry per symbol. */
-struct got_entry
-{
- struct got_entry *next;
+ if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
+ return 1;
- /* The symbol addend that we'll be placing in the GOT. */
- bfd_vma addend;
+ if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
+ return -1;
- /* Reference count until size_dynamic_sections, GOT offset thereafter. */
- union
- {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } got;
+ if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
+ return 1;
- /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
- TLS_TPREL or TLS_DTPREL for tls entries. */
- char tls_type;
-};
+ if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
+ return -1;
-/* The same for PLT. */
-struct plt_entry
-{
- struct plt_entry *next;
+ if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
+ return 1;
- bfd_vma addend;
+ return 0;
+}
- union
- {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } plt;
-};
+/* Search SYMS for a symbol of the given VALUE. */
-/* Of those relocs that might be copied as dynamic relocs, this macro
- selects those that must be copied when linking a shared library,
- even when the symbol is local. */
+static asymbol *
+sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
+{
+ long mid;
-#define MUST_BE_DYN_RELOC(RTYPE) \
- ((RTYPE) != R_PPC64_REL32 \
- && (RTYPE) != R_PPC64_REL64 \
- && (RTYPE) != R_PPC64_REL30)
+ if (id == -1)
+ {
+ while (lo < hi)
+ {
+ mid = (lo + hi) >> 1;
+ if (syms[mid]->value + syms[mid]->section->vma < value)
+ lo = mid + 1;
+ else if (syms[mid]->value + syms[mid]->section->vma > value)
+ hi = mid;
+ else
+ return syms[mid];
+ }
+ }
+ else
+ {
+ while (lo < hi)
+ {
+ mid = (lo + hi) >> 1;
+ if (syms[mid]->section->id < id)
+ lo = mid + 1;
+ else if (syms[mid]->section->id > id)
+ hi = mid;
+ else if (syms[mid]->value < value)
+ lo = mid + 1;
+ else if (syms[mid]->value > value)
+ hi = mid;
+ else
+ return syms[mid];
+ }
+ }
+ return NULL;
+}
-/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
- copying dynamic variables from a shared lib into an app's dynbss
- section, and instead use a dynamic relocation to point into the
- shared lib. */
-#define ELIMINATE_COPY_RELOCS 1
+static bfd_boolean
+section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
+{
+ bfd_vma vma = *(bfd_vma *) ptr;
+ return ((section->flags & SEC_ALLOC) != 0
+ && section->vma <= vma
+ && vma < section->vma + section->size);
+}
-/* Section name for stubs is the associated section name plus this
- string. */
-#define STUB_SUFFIX ".stub"
+/* Create synthetic symbols, effectively restoring "dot-symbol" function
+ entry syms. Also generate @plt symbols for the glink branch table. */
-/* Linker stubs.
+static long
+ppc64_elf_get_synthetic_symtab (bfd *abfd,
+ long static_count, asymbol **static_syms,
+ long dyn_count, asymbol **dyn_syms,
+ asymbol **ret)
+{
+ asymbol *s;
+ long i;
+ long count;
+ char *names;
+ long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
+ asection *opd;
+ bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
+ asymbol **syms;
+
+ *ret = NULL;
+
+ opd = bfd_get_section_by_name (abfd, ".opd");
+ if (opd == NULL)
+ return 0;
+
+ symcount = static_count;
+ if (!relocatable)
+ symcount += dyn_count;
+ if (symcount == 0)
+ return 0;
+
+ syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
+ if (syms == NULL)
+ return -1;
+
+ if (!relocatable && static_count != 0 && dyn_count != 0)
+ {
+ /* Use both symbol tables. */
+ memcpy (syms, static_syms, static_count * sizeof (*syms));
+ memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
+ }
+ else if (!relocatable && static_count == 0)
+ memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
+ else
+ memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
+
+ synthetic_opd = opd;
+ synthetic_relocatable = relocatable;
+ qsort (syms, symcount, sizeof (*syms), compare_symbols);
+
+ if (!relocatable && symcount > 1)
+ {
+ long j;
+ /* Trim duplicate syms, since we may have merged the normal and
+ dynamic symbols. Actually, we only care about syms that have
+ different values, so trim any with the same value. */
+ for (i = 1, j = 1; i < symcount; ++i)
+ if (syms[i - 1]->value + syms[i - 1]->section->vma
+ != syms[i]->value + syms[i]->section->vma)
+ syms[j++] = syms[i];
+ symcount = j;
+ }
+
+ i = 0;
+ if (syms[i]->section == opd)
+ ++i;
+ codesecsym = i;
+
+ for (; i < symcount; ++i)
+ if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
+ != (SEC_CODE | SEC_ALLOC))
+ || (syms[i]->flags & BSF_SECTION_SYM) == 0)
+ break;
+ codesecsymend = i;
+
+ for (; i < symcount; ++i)
+ if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
+ break;
+ secsymend = i;
+
+ for (; i < symcount; ++i)
+ if (syms[i]->section != opd)
+ break;
+ opdsymend = i;
+
+ for (; i < symcount; ++i)
+ if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
+ != (SEC_CODE | SEC_ALLOC))
+ break;
+ symcount = i;
+
+ count = 0;
+
+ if (relocatable)
+ {
+ bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
+ arelent *r;
+ size_t size;
+ long relcount;
+
+ if (opdsymend == secsymend)
+ goto done;
+
+ slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
+ relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
+ if (relcount == 0)
+ goto done;
+
+ if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
+ {
+ count = -1;
+ goto done;
+ }
+
+ size = 0;
+ for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
+ {
+ asymbol *sym;
+
+ while (r < opd->relocation + relcount
+ && r->address < syms[i]->value + opd->vma)
+ ++r;
+
+ if (r == opd->relocation + relcount)
+ break;
+
+ if (r->address != syms[i]->value + opd->vma)
+ continue;
+
+ if (r->howto->type != R_PPC64_ADDR64)
+ continue;
+
+ sym = *r->sym_ptr_ptr;
+ if (!sym_exists_at (syms, opdsymend, symcount,
+ sym->section->id, sym->value + r->addend))
+ {
+ ++count;
+ size += sizeof (asymbol);
+ size += strlen (syms[i]->name) + 2;
+ }
+ }
+
+ s = *ret = bfd_malloc (size);
+ if (s == NULL)
+ {
+ count = -1;
+ goto done;
+ }
+
+ names = (char *) (s + count);
+
+ for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
+ {
+ asymbol *sym;
+
+ while (r < opd->relocation + relcount
+ && r->address < syms[i]->value + opd->vma)
+ ++r;
+
+ if (r == opd->relocation + relcount)
+ break;
+
+ if (r->address != syms[i]->value + opd->vma)
+ continue;
+
+ if (r->howto->type != R_PPC64_ADDR64)
+ continue;
+
+ sym = *r->sym_ptr_ptr;
+ if (!sym_exists_at (syms, opdsymend, symcount,
+ sym->section->id, sym->value + r->addend))
+ {
+ size_t len;
+
+ *s = *syms[i];
+ s->section = sym->section;
+ s->value = sym->value + r->addend;
+ s->name = names;
+ *names++ = '.';
+ len = strlen (syms[i]->name);
+ memcpy (names, syms[i]->name, len + 1);
+ names += len + 1;
+ /* Have udata.p point back to the original symbol this
+ synthetic symbol was derived from. */
+ s->udata.p = syms[i];
+ s++;
+ }
+ }
+ }
+ else
+ {
+ bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
+ bfd_byte *contents;
+ size_t size;
+ long plt_count = 0;
+ bfd_vma glink_vma = 0, resolv_vma = 0;
+ asection *dynamic, *glink = NULL, *relplt = NULL;
+ arelent *p;
+
+ if (!bfd_malloc_and_get_section (abfd, opd, &contents))
+ {
+ if (contents)
+ {
+ free_contents_and_exit:
+ free (contents);
+ }
+ count = -1;
+ goto done;
+ }
+
+ size = 0;
+ for (i = secsymend; i < opdsymend; ++i)
+ {
+ bfd_vma ent;
+
+ ent = bfd_get_64 (abfd, contents + syms[i]->value);
+ if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
+ {
+ ++count;
+ size += sizeof (asymbol);
+ size += strlen (syms[i]->name) + 2;
+ }
+ }
+
+ /* Get start of .glink stubs from DT_PPC64_GLINK. */
+ dynamic = bfd_get_section_by_name (abfd, ".dynamic");
+ if (dynamic != NULL)
+ {
+ bfd_byte *dynbuf, *extdyn, *extdynend;
+ size_t extdynsize;
+ void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
+
+ if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
+ goto free_contents_and_exit;
+
+ extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
+ swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
+
+ extdyn = dynbuf;
+ extdynend = extdyn + dynamic->size;
+ for (; extdyn < extdynend; extdyn += extdynsize)
+ {
+ Elf_Internal_Dyn dyn;
+ (*swap_dyn_in) (abfd, extdyn, &dyn);
+
+ if (dyn.d_tag == DT_NULL)
+ break;
+
+ if (dyn.d_tag == DT_PPC64_GLINK)
+ {
+ /* The first glink stub starts at offset 32; see comment in
+ ppc64_elf_finish_dynamic_sections. */
+ glink_vma = dyn.d_un.d_val + 32;
+ /* The .glink section usually does not survive the final
+ link; search for the section (usually .text) where the
+ glink stubs now reside. */
+ glink = bfd_sections_find_if (abfd, section_covers_vma,
+ &glink_vma);
+ break;
+ }
+ }
+
+ free (dynbuf);
+ }
+
+ if (glink != NULL)
+ {
+ /* Determine __glink trampoline by reading the relative branch
+ from the first glink stub. */
+ bfd_byte buf[4];
+ if (bfd_get_section_contents (abfd, glink, buf,
+ glink_vma + 4 - glink->vma, 4))
+ {
+ unsigned int insn = bfd_get_32 (abfd, buf);
+ insn ^= B_DOT;
+ if ((insn & ~0x3fffffc) == 0)
+ resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
+ }
+
+ if (resolv_vma)
+ size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
+ }
+
+ relplt = bfd_get_section_by_name (abfd, ".rela.plt");
+ if (glink != NULL && relplt != NULL)
+ {
+ slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
+ if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
+ goto free_contents_and_exit;
+
+ plt_count = relplt->size / sizeof (Elf64_External_Rela);
+ size += plt_count * sizeof (asymbol);
+
+ p = relplt->relocation;
+ for (i = 0; i < plt_count; i++, p++)
+ size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
+ }
+
+ s = *ret = bfd_malloc (size);
+ if (s == NULL)
+ goto free_contents_and_exit;
+
+ names = (char *) (s + count + plt_count + (resolv_vma != 0));
+
+ for (i = secsymend; i < opdsymend; ++i)
+ {
+ bfd_vma ent;
+
+ ent = bfd_get_64 (abfd, contents + syms[i]->value);
+ if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
+ {
+ long lo, hi;
+ size_t len;
+ asection *sec = abfd->sections;
+
+ *s = *syms[i];
+ lo = codesecsym;
+ hi = codesecsymend;
+ while (lo < hi)
+ {
+ long mid = (lo + hi) >> 1;
+ if (syms[mid]->section->vma < ent)
+ lo = mid + 1;
+ else if (syms[mid]->section->vma > ent)
+ hi = mid;
+ else
+ {
+ sec = syms[mid]->section;
+ break;
+ }
+ }
+
+ if (lo >= hi && lo > codesecsym)
+ sec = syms[lo - 1]->section;
+
+ for (; sec != NULL; sec = sec->next)
+ {
+ if (sec->vma > ent)
+ break;
+ if ((sec->flags & SEC_ALLOC) == 0
+ || (sec->flags & SEC_LOAD) == 0)
+ break;
+ if ((sec->flags & SEC_CODE) != 0)
+ s->section = sec;
+ }
+ s->value = ent - s->section->vma;
+ s->name = names;
+ *names++ = '.';
+ len = strlen (syms[i]->name);
+ memcpy (names, syms[i]->name, len + 1);
+ names += len + 1;
+ /* Have udata.p point back to the original symbol this
+ synthetic symbol was derived from. */
+ s->udata.p = syms[i];
+ s++;
+ }
+ }
+ free (contents);
+
+ if (glink != NULL && relplt != NULL)
+ {
+ if (resolv_vma)
+ {
+ /* Add a symbol for the main glink trampoline. */
+ memset (s, sizeof *s, 0);
+ s->the_bfd = abfd;
+ s->flags = BSF_GLOBAL;
+ s->section = glink;
+ s->value = resolv_vma - glink->vma;
+ s->name = names;
+ memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
+ names += sizeof ("__glink_PLTresolve");
+ s++;
+ count++;
+ }
+
+ /* FIXME: It would be very much nicer to put sym@plt on the
+ stub rather than on the glink branch table entry. The
+ objdump disassembler would then use a sensible symbol
+ name on plt calls. The difficulty in doing so is
+ a) finding the stubs, and,
+ b) matching stubs against plt entries, and,
+ c) there can be multiple stubs for a given plt entry.
+
+ Solving (a) could be done by code scanning, but older
+ ppc64 binaries used different stubs to current code.
+ (b) is the tricky one since you need to known the toc
+ pointer for at least one function that uses a pic stub to
+ be able to calculate the plt address referenced.
+ (c) means gdb would need to set multiple breakpoints (or
+ find the glink branch itself) when setting breakpoints
+ for pending shared library loads. */
+ p = relplt->relocation;
+ for (i = 0; i < plt_count; i++, p++)
+ {
+ size_t len;
+
+ *s = **p->sym_ptr_ptr;
+ /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
+ we are defining a symbol, ensure one of them is set. */
+ if ((s->flags & BSF_LOCAL) == 0)
+ s->flags |= BSF_GLOBAL;
+ s->section = glink;
+ s->value = glink_vma - glink->vma;
+ s->name = names;
+ s->udata.p = NULL;
+ len = strlen ((*p->sym_ptr_ptr)->name);
+ memcpy (names, (*p->sym_ptr_ptr)->name, len);
+ names += len;
+ memcpy (names, "@plt", sizeof ("@plt"));
+ names += sizeof ("@plt");
+ s++;
+ glink_vma += 8;
+ if (i >= 0x8000)
+ glink_vma += 4;
+ }
+ count += plt_count;
+ }
+ }
+
+ done:
+ free (syms);
+ return count;
+}
+\f
+/* The following functions are specific to the ELF linker, while
+ functions above are used generally. Those named ppc64_elf_* are
+ called by the main ELF linker code. They appear in this file more
+ or less in the order in which they are called. eg.
+ ppc64_elf_check_relocs is called early in the link process,
+ ppc64_elf_finish_dynamic_sections is one of the last functions
+ called.
+
+ PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
+ functions have both a function code symbol and a function descriptor
+ symbol. A call to foo in a relocatable object file looks like:
+
+ . .text
+ . x:
+ . bl .foo
+ . nop
+
+ The function definition in another object file might be:
+
+ . .section .opd
+ . foo: .quad .foo
+ . .quad .TOC.@tocbase
+ . .quad 0
+ .
+ . .text
+ . .foo: blr
+
+ When the linker resolves the call during a static link, the branch
+ unsurprisingly just goes to .foo and the .opd information is unused.
+ If the function definition is in a shared library, things are a little
+ different: The call goes via a plt call stub, the opd information gets
+ copied to the plt, and the linker patches the nop.
+
+ . x:
+ . bl .foo_stub
+ . ld 2,40(1)
+ .
+ .
+ . .foo_stub:
+ . addis 12,2,Lfoo@toc@ha # in practice, the call stub
+ . addi 12,12,Lfoo@toc@l # is slightly optimized, but
+ . std 2,40(1) # this is the general idea
+ . ld 11,0(12)
+ . ld 2,8(12)
+ . mtctr 11
+ . ld 11,16(12)
+ . bctr
+ .
+ . .section .plt
+ . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
+
+ The "reloc ()" notation is supposed to indicate that the linker emits
+ an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
+ copying.
+
+ What are the difficulties here? Well, firstly, the relocations
+ examined by the linker in check_relocs are against the function code
+ sym .foo, while the dynamic relocation in the plt is emitted against
+ the function descriptor symbol, foo. Somewhere along the line, we need
+ to carefully copy dynamic link information from one symbol to the other.
+ Secondly, the generic part of the elf linker will make .foo a dynamic
+ symbol as is normal for most other backends. We need foo dynamic
+ instead, at least for an application final link. However, when
+ creating a shared library containing foo, we need to have both symbols
+ dynamic so that references to .foo are satisfied during the early
+ stages of linking. Otherwise the linker might decide to pull in a
+ definition from some other object, eg. a static library.
+
+ Update: As of August 2004, we support a new convention. Function
+ calls may use the function descriptor symbol, ie. "bl foo". This
+ behaves exactly as "bl .foo". */
+
+/* The linker needs to keep track of the number of relocs that it
+ decides to copy as dynamic relocs in check_relocs for each symbol.
+ This is so that it can later discard them if they are found to be
+ unnecessary. We store the information in a field extending the
+ regular ELF linker hash table. */
+
+struct ppc_dyn_relocs
+{
+ struct ppc_dyn_relocs *next;
+
+ /* The input section of the reloc. */
+ asection *sec;
+
+ /* Total number of relocs copied for the input section. */
+ bfd_size_type count;
+
+ /* Number of pc-relative relocs copied for the input section. */
+ bfd_size_type pc_count;
+};
+
+/* Track GOT entries needed for a given symbol. We might need more
+ than one got entry per symbol. */
+struct got_entry
+{
+ struct got_entry *next;
+
+ /* The symbol addend that we'll be placing in the GOT. */
+ bfd_vma addend;
+
+ /* Unlike other ELF targets, we use separate GOT entries for the same
+ symbol referenced from different input files. This is to support
+ automatic multiple TOC/GOT sections, where the TOC base can vary
+ from one input file to another. FIXME: After group_sections we
+ ought to merge entries within the group.
+
+ Point to the BFD owning this GOT entry. */
+ bfd *owner;
+
+ /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
+ TLS_TPREL or TLS_DTPREL for tls entries. */
+ char tls_type;
+
+ /* Reference count until size_dynamic_sections, GOT offset thereafter. */
+ union
+ {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } got;
+};
+
+/* The same for PLT. */
+struct plt_entry
+{
+ struct plt_entry *next;
+
+ bfd_vma addend;
+
+ union
+ {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } plt;
+};
+
+/* Of those relocs that might be copied as dynamic relocs, this function
+ selects those that must be copied when linking a shared library,
+ even when the symbol is local. */
+
+static int
+must_be_dyn_reloc (struct bfd_link_info *info,
+ enum elf_ppc64_reloc_type r_type)
+{
+ switch (r_type)
+ {
+ default:
+ return 1;
+
+ case R_PPC64_REL32:
+ case R_PPC64_REL64:
+ case R_PPC64_REL30:
+ return 0;
+
+ case R_PPC64_TPREL16:
+ case R_PPC64_TPREL16_LO:
+ case R_PPC64_TPREL16_HI:
+ case R_PPC64_TPREL16_HA:
+ case R_PPC64_TPREL16_DS:
+ case R_PPC64_TPREL16_LO_DS:
+ case R_PPC64_TPREL16_HIGHER:
+ case R_PPC64_TPREL16_HIGHERA:
+ case R_PPC64_TPREL16_HIGHEST:
+ case R_PPC64_TPREL16_HIGHESTA:
+ case R_PPC64_TPREL64:
+ return !info->executable;
+ }
+}
+
+/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
+ copying dynamic variables from a shared lib into an app's dynbss
+ section, and instead use a dynamic relocation to point into the
+ shared lib. With code that gcc generates, it's vital that this be
+ enabled; In the PowerPC64 ABI, the address of a function is actually
+ the address of a function descriptor, which resides in the .opd
+ section. gcc uses the descriptor directly rather than going via the
+ GOT as some other ABI's do, which means that initialized function
+ pointers must reference the descriptor. Thus, a function pointer
+ initialized to the address of a function in a shared library will
+ either require a copy reloc, or a dynamic reloc. Using a copy reloc
+ redefines the function descriptor symbol to point to the copy. This
+ presents a problem as a plt entry for that function is also
+ initialized from the function descriptor symbol and the copy reloc
+ may not be initialized first. */
+#define ELIMINATE_COPY_RELOCS 1
+
+/* Section name for stubs is the associated section name plus this
+ string. */
+#define STUB_SUFFIX ".stub"
+
+/* Linker stubs.
ppc_stub_long_branch:
Used when a 14 bit branch (or even a 24 bit branch) can't reach its
destination, but a 24 bit branch in a stub section will reach.
. bctr
ppc_stub_plt_call:
- Used to call a function in a shared library.
+ Used to call a function in a shared library. If it so happens that
+ the plt entry referenced crosses a 64k boundary, then an extra
+ "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
. addis %r12,%r2,xxx@toc@ha
. std %r2,40(%r1)
. ld %r11,xxx+0@toc@l(%r12)
- . ld %r2,xxx+8@toc@l(%r12)
. mtctr %r11
+ . ld %r2,xxx+8@toc@l(%r12)
. ld %r11,xxx+16@toc@l(%r12)
. bctr
. addi %r2,%r2,off@l
. mtctr %r11
. bctr
+
+ In cases where the "addis" instruction would add zero, the "addis" is
+ omitted and following instructions modified slightly in some cases.
*/
enum ppc_stub_type {
/* Base hash table entry structure. */
struct bfd_hash_entry root;
- /* Offset within .branch_lt. */
+ /* Offset within branch lookup table. */
unsigned int offset;
/* Generation marker. */
{
struct elf_link_hash_entry elf;
- /* A pointer to the most recently used stub hash entry against this
- symbol. */
- struct ppc_stub_hash_entry *stub_cache;
+ union {
+ /* A pointer to the most recently used stub hash entry against this
+ symbol. */
+ struct ppc_stub_hash_entry *stub_cache;
+
+ /* A pointer to the next symbol starting with a '.' */
+ struct ppc_link_hash_entry *next_dot_sym;
+ } u;
/* Track dynamic relocs copied for this symbol. */
struct ppc_dyn_relocs *dyn_relocs;
/* Link between function code and descriptor symbols. */
- struct elf_link_hash_entry *oh;
+ struct ppc_link_hash_entry *oh;
/* Flag function code and descriptor symbols. */
unsigned int is_func:1;
unsigned int is_func_descriptor:1;
- unsigned int is_entry:1;
+ unsigned int fake:1;
+
+ /* Whether global opd/toc sym has been adjusted or not.
+ After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
+ should be set for all globals defined in any opd/toc section. */
+ unsigned int adjust_done:1;
+
+ /* Set if we twiddled this symbol to weak at some stage. */
+ unsigned int was_undefined:1;
/* Contexts in which symbol is used in the GOT (or TOC).
TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
bfd *stub_bfd;
/* Linker call-backs. */
- asection * (*add_stub_section) PARAMS ((const char *, asection *));
- void (*layout_sections_again) PARAMS ((void));
+ asection * (*add_stub_section) (const char *, asection *);
+ void (*layout_sections_again) (void);
/* Array to keep track of which stub sections have been created, and
information on stub grouping. */
bfd_vma toc_off;
} *stub_group;
- /* Support for multiple toc sections. */
- unsigned int no_multi_toc;
- unsigned int multi_toc_needed;
-
/* Temp used when calculating TOC pointers. */
bfd_vma toc_curr;
- /* List of input code sections used by ppc64_elf_size_stubs. */
- asection *input_list;
+ /* Highest input section id. */
+ int top_id;
+
+ /* Highest output section index. */
+ int top_index;
+
+ /* Used when adding symbols. */
+ struct ppc_link_hash_entry *dot_syms;
+
+ /* List of input sections for each output section. */
+ asection **input_list;
/* Short-cuts to get to dynamic linker sections. */
- asection *sgot;
- asection *srelgot;
- asection *splt;
- asection *srelplt;
- asection *sdynbss;
- asection *srelbss;
- asection *sglink;
+ asection *got;
+ asection *plt;
+ asection *relplt;
+ asection *dynbss;
+ asection *relbss;
+ asection *glink;
asection *sfpr;
- asection *sbrlt;
- asection *srelbrlt;
+ asection *brlt;
+ asection *relbrlt;
- /* Short-cut to first output tls section. */
- asection *tls_sec;
+ /* Shortcut to .__tls_get_addr and __tls_get_addr. */
+ struct ppc_link_hash_entry *tls_get_addr;
+ struct ppc_link_hash_entry *tls_get_addr_fd;
- /* Shortcut to .__tls_get_addr. */
- struct elf_link_hash_entry *tls_get_addr;
+ /* Statistics. */
+ unsigned long stub_count[ppc_stub_plt_call];
- /* TLS local dynamic got entry handling. */
- union {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } tlsld_got;
+ /* Number of stubs against global syms. */
+ unsigned long stub_globals;
/* Set if we should emit symbols for stubs. */
- unsigned int emit_stub_syms;
+ unsigned int emit_stub_syms:1;
- /* Set on error. */
- unsigned int stub_error;
+ /* Support for multiple toc sections. */
+ unsigned int no_multi_toc:1;
+ unsigned int multi_toc_needed:1;
- /* Flag set when small branches are detected. Used to
- select suitable defaults for the stub group size. */
- unsigned int has_14bit_branch;
+ /* Set on error. */
+ unsigned int stub_error:1;
- /* Set if we detect a reference undefined weak symbol. */
- unsigned int have_undefweak;
+ /* Temp used by ppc64_elf_check_directives. */
+ unsigned int twiddled_syms:1;
/* Incremented every time we size stubs. */
unsigned int stub_iteration;
struct sym_sec_cache sym_sec;
};
-static struct bfd_hash_entry *stub_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_hash_entry *branch_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_hash_entry *link_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
- PARAMS ((bfd *));
-static void ppc64_elf_link_hash_table_free
- PARAMS ((struct bfd_link_hash_table *));
-static char *ppc_stub_name
- PARAMS ((const asection *, const asection *,
- const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
-static struct ppc_stub_hash_entry *ppc_get_stub_entry
- PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
- const Elf_Internal_Rela *, struct ppc_link_hash_table *));
-static struct ppc_stub_hash_entry *ppc_add_stub
- PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
-static bfd_boolean create_linkage_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_boolean create_got_section
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_boolean ppc64_elf_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static void ppc64_elf_copy_indirect_symbol
- PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
- struct elf_link_hash_entry *));
-static bfd_boolean update_local_sym_info
- PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned long, bfd_vma, int));
-static bfd_boolean update_plt_info
- PARAMS ((bfd *, struct ppc_link_hash_entry *, bfd_vma));
-static bfd_boolean ppc64_elf_check_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-static asection * ppc64_elf_gc_mark_hook
- PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-static bfd_boolean ppc64_elf_gc_sweep_hook
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-static bfd_boolean func_desc_adjust
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static bfd_boolean ppc64_elf_func_desc_adjust
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_boolean ppc64_elf_adjust_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-static void ppc64_elf_hide_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
-static bfd_boolean get_sym_h
- PARAMS ((struct elf_link_hash_entry **, Elf_Internal_Sym **, asection **,
- char **, Elf_Internal_Sym **, unsigned long, bfd *));
-static int get_tls_mask
- PARAMS ((char **, Elf_Internal_Sym **, const Elf_Internal_Rela *, bfd *));
-static bfd_boolean allocate_dynrelocs
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static bfd_boolean readonly_dynrelocs
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static enum elf_reloc_type_class ppc64_elf_reloc_type_class
- PARAMS ((const Elf_Internal_Rela *));
-static bfd_boolean ppc64_elf_size_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static enum ppc_stub_type ppc_type_of_stub
- PARAMS ((asection *, const Elf_Internal_Rela *,
- struct ppc_link_hash_entry **, bfd_vma));
-static bfd_byte *build_plt_stub
- PARAMS ((bfd *, bfd_byte *, int));
-static bfd_boolean ppc_build_one_stub
- PARAMS ((struct bfd_hash_entry *, PTR));
-static bfd_boolean ppc_size_one_stub
- PARAMS ((struct bfd_hash_entry *, PTR));
-static void group_sections
- PARAMS ((struct ppc_link_hash_table *, bfd_size_type, bfd_boolean));
-static bfd_boolean ppc64_elf_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
- asection **));
-static bfd_boolean ppc64_elf_finish_dynamic_symbol
- PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- Elf_Internal_Sym *));
-static bfd_boolean ppc64_elf_finish_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
+/* Rename some of the generic section flags to better document how they
+ are used here. */
+#define has_toc_reloc has_gp_reloc
+#define makes_toc_func_call need_finalize_relax
+#define call_check_in_progress reloc_done
/* Get the ppc64 ELF linker hash table from a link_info structure. */
/* Create an entry in the stub hash table. */
static struct bfd_hash_entry *
-stub_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+stub_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
/* Create an entry in the branch hash table. */
static struct bfd_hash_entry *
-branch_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+branch_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
/* Create an entry in a ppc64 ELF linker hash table. */
static struct bfd_hash_entry *
-link_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
{
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
- eh->stub_cache = NULL;
- eh->dyn_relocs = NULL;
- eh->oh = NULL;
- eh->is_func = 0;
- eh->is_func_descriptor = 0;
- eh->is_entry = 0;
- eh->tls_mask = 0;
+ memset (&eh->u.stub_cache, 0,
+ (sizeof (struct ppc_link_hash_entry)
+ - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
+
+ /* When making function calls, old ABI code references function entry
+ points (dot symbols), while new ABI code references the function
+ descriptor symbol. We need to make any combination of reference and
+ definition work together, without breaking archive linking.
+
+ For a defined function "foo" and an undefined call to "bar":
+ An old object defines "foo" and ".foo", references ".bar" (possibly
+ "bar" too).
+ A new object defines "foo" and references "bar".
+
+ A new object thus has no problem with its undefined symbols being
+ satisfied by definitions in an old object. On the other hand, the
+ old object won't have ".bar" satisfied by a new object.
+
+ Keep a list of newly added dot-symbols. */
+
+ if (string[0] == '.')
+ {
+ struct ppc_link_hash_table *htab;
+
+ htab = (struct ppc_link_hash_table *) table;
+ eh->u.next_dot_sym = htab->dot_syms;
+ htab->dot_syms = eh;
+ }
}
return entry;
/* Create a ppc64 ELF linker hash table. */
static struct bfd_link_hash_table *
-ppc64_elf_link_hash_table_create (abfd)
- bfd *abfd;
+ppc64_elf_link_hash_table_create (bfd *abfd)
{
struct ppc_link_hash_table *htab;
bfd_size_type amt = sizeof (struct ppc_link_hash_table);
- htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
+ htab = bfd_zmalloc (amt);
if (htab == NULL)
return NULL;
- if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
+ if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
+ sizeof (struct ppc_link_hash_entry)))
{
free (htab);
return NULL;
}
/* Init the stub hash table too. */
- if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
+ if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
+ sizeof (struct ppc_stub_hash_entry)))
return NULL;
/* And the branch hash table. */
- if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
+ if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
+ sizeof (struct ppc_branch_hash_entry)))
return NULL;
- htab->stub_bfd = NULL;
- htab->add_stub_section = NULL;
- htab->layout_sections_again = NULL;
- htab->stub_group = NULL;
- htab->no_multi_toc = 0;
- htab->multi_toc_needed = 0;
- htab->toc_curr = 0;
- htab->input_list = NULL;
- htab->sgot = NULL;
- htab->srelgot = NULL;
- htab->splt = NULL;
- htab->srelplt = NULL;
- htab->sdynbss = NULL;
- htab->srelbss = NULL;
- htab->sglink = NULL;
- htab->sfpr = NULL;
- htab->sbrlt = NULL;
- htab->srelbrlt = NULL;
- htab->tls_sec = NULL;
- htab->tls_get_addr = NULL;
- htab->tlsld_got.refcount = 0;
- htab->emit_stub_syms = 0;
- htab->stub_error = 0;
- htab->has_14bit_branch = 0;
- htab->have_undefweak = 0;
- htab->stub_iteration = 0;
- htab->sym_sec.abfd = NULL;
/* Initializing two fields of the union is just cosmetic. We really
only care about glist, but when compiled on a 32-bit host the
bfd_vma fields are larger. Setting the bfd_vma to zero makes
debugger inspection of these fields look nicer. */
- htab->elf.init_refcount.refcount = 0;
- htab->elf.init_refcount.glist = NULL;
- htab->elf.init_offset.offset = 0;
- htab->elf.init_offset.glist = NULL;
+ htab->elf.init_got_refcount.refcount = 0;
+ htab->elf.init_got_refcount.glist = NULL;
+ htab->elf.init_plt_refcount.refcount = 0;
+ htab->elf.init_plt_refcount.glist = NULL;
+ htab->elf.init_got_offset.offset = 0;
+ htab->elf.init_got_offset.glist = NULL;
+ htab->elf.init_plt_offset.offset = 0;
+ htab->elf.init_plt_offset.glist = NULL;
return &htab->elf.root;
}
/* Free the derived linker hash table. */
static void
-ppc64_elf_link_hash_table_free (hash)
- struct bfd_link_hash_table *hash;
+ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
{
struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
_bfd_generic_link_hash_table_free (hash);
}
+/* Satisfy the ELF linker by filling in some fields in our fake bfd. */
+
+void
+ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
+{
+ struct ppc_link_hash_table *htab;
+
+ elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
+
+/* Always hook our dynamic sections into the first bfd, which is the
+ linker created stub bfd. This ensures that the GOT header is at
+ the start of the output TOC section. */
+ htab = ppc_hash_table (info);
+ htab->stub_bfd = abfd;
+ htab->elf.dynobj = abfd;
+}
+
/* Build a name for an entry in the stub hash table. */
static char *
-ppc_stub_name (input_section, sym_sec, h, rel)
- const asection *input_section;
- const asection *sym_sec;
- const struct ppc_link_hash_entry *h;
- const Elf_Internal_Rela *rel;
+ppc_stub_name (const asection *input_section,
+ const asection *sym_sec,
+ const struct ppc_link_hash_entry *h,
+ const Elf_Internal_Rela *rel)
{
char *stub_name;
bfd_size_type len;
{
len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
stub_name = bfd_malloc (len);
- if (stub_name != NULL)
- {
- sprintf (stub_name, "%08x_%s+%x",
- input_section->id & 0xffffffff,
- h->elf.root.root.string,
- (int) rel->r_addend & 0xffffffff);
- }
+ if (stub_name == NULL)
+ return stub_name;
+
+ sprintf (stub_name, "%08x.%s+%x",
+ input_section->id & 0xffffffff,
+ h->elf.root.root.string,
+ (int) rel->r_addend & 0xffffffff);
}
else
{
len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
stub_name = bfd_malloc (len);
- if (stub_name != NULL)
- {
- sprintf (stub_name, "%08x_%x:%x+%x",
- input_section->id & 0xffffffff,
- sym_sec->id & 0xffffffff,
- (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
- (int) rel->r_addend & 0xffffffff);
- }
+ if (stub_name == NULL)
+ return stub_name;
+
+ sprintf (stub_name, "%08x.%x:%x+%x",
+ input_section->id & 0xffffffff,
+ sym_sec->id & 0xffffffff,
+ (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
+ (int) rel->r_addend & 0xffffffff);
}
+ if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
+ stub_name[len - 2] = 0;
return stub_name;
}
creating the stub name takes a bit of time. */
static struct ppc_stub_hash_entry *
-ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
- const asection *input_section;
- const asection *sym_sec;
- struct elf_link_hash_entry *hash;
- const Elf_Internal_Rela *rel;
- struct ppc_link_hash_table *htab;
+ppc_get_stub_entry (const asection *input_section,
+ const asection *sym_sec,
+ struct ppc_link_hash_entry *h,
+ const Elf_Internal_Rela *rel,
+ struct ppc_link_hash_table *htab)
{
struct ppc_stub_hash_entry *stub_entry;
- struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
const asection *id_sec;
/* If this input section is part of a group of sections sharing one
distinguish between them. */
id_sec = htab->stub_group[input_section->id].link_sec;
- if (h != NULL && h->stub_cache != NULL
- && h->stub_cache->h == h
- && h->stub_cache->id_sec == id_sec)
+ if (h != NULL && h->u.stub_cache != NULL
+ && h->u.stub_cache->h == h
+ && h->u.stub_cache->id_sec == id_sec)
{
- stub_entry = h->stub_cache;
+ stub_entry = h->u.stub_cache;
}
else
{
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
stub_name, FALSE, FALSE);
if (h != NULL)
- h->stub_cache = stub_entry;
+ h->u.stub_cache = stub_entry;
free (stub_name);
}
stub entry are initialised. */
static struct ppc_stub_hash_entry *
-ppc_add_stub (stub_name, section, htab)
- const char *stub_name;
- asection *section;
- struct ppc_link_hash_table *htab;
+ppc_add_stub (const char *stub_name,
+ asection *section,
+ struct ppc_link_hash_table *htab)
{
asection *link_sec;
asection *stub_sec;
TRUE, FALSE);
if (stub_entry == NULL)
{
- (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
- bfd_archive_filename (section->owner),
- stub_name);
+ (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
+ section->owner, stub_name);
return NULL;
}
/* Create sections for linker generated code. */
static bfd_boolean
-create_linkage_sections (dynobj, info)
- bfd *dynobj;
- struct bfd_link_info *info;
+create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
flagword flags;
/* Create .sfpr for code to save and restore fp regs. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
+ htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
+ flags);
if (htab->sfpr == NULL
- || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
return FALSE;
/* Create .glink for lazy dynamic linking support. */
- htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
- if (htab->sglink == NULL
- || ! bfd_set_section_flags (dynobj, htab->sglink, flags)
- || ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
+ htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
+ flags);
+ if (htab->glink == NULL
+ || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
return FALSE;
- /* Create .branch_lt for plt_branch stubs. */
+ /* Create branch lookup table for plt_branch stubs. */
flags = (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
- if (htab->sbrlt == NULL
- || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
- || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
+ htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
+ flags);
+ if (htab->brlt == NULL
+ || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
+ return FALSE;
+
+ if (!info->shared)
+ return TRUE;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
+ ".rela.branch_lt",
+ flags);
+ if (!htab->relbrlt
+ || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
return FALSE;
- if (info->shared)
- {
- flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
- | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
- if (!htab->srelbrlt
- || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
- || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
- return FALSE;
- }
return TRUE;
}
-/* Create .got and .rela.got sections in DYNOBJ, and set up
- shortcuts to them in our hash table. */
+/* Create .got and .rela.got sections in ABFD, and .got in dynobj if
+ not already done. */
static bfd_boolean
-create_got_section (dynobj, info)
- bfd *dynobj;
- struct bfd_link_info *info;
+create_got_section (bfd *abfd, struct bfd_link_info *info)
{
- struct ppc_link_hash_table *htab;
+ asection *got, *relgot;
+ flagword flags;
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
- if (! _bfd_elf_create_got_section (dynobj, info))
+ if (!is_ppc64_elf (abfd))
return FALSE;
- htab = ppc_hash_table (info);
- htab->sgot = bfd_get_section_by_name (dynobj, ".got");
- if (!htab->sgot)
- abort ();
+ if (!htab->got)
+ {
+ if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
+ return FALSE;
+
+ htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
+ if (!htab->got)
+ abort ();
+ }
- htab->srelgot = bfd_make_section (dynobj, ".rela.got");
- if (!htab->srelgot
- || ! bfd_set_section_flags (dynobj, htab->srelgot,
- (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY | SEC_LINKER_CREATED
- | SEC_READONLY))
- || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+
+ got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
+ if (!got
+ || !bfd_set_section_alignment (abfd, got, 3))
return FALSE;
+
+ relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
+ flags | SEC_READONLY);
+ if (!relgot
+ || ! bfd_set_section_alignment (abfd, relgot, 3))
+ return FALSE;
+
+ ppc64_elf_tdata (abfd)->got = got;
+ ppc64_elf_tdata (abfd)->relgot = relgot;
return TRUE;
}
/* Create the dynamic sections, and set up shortcuts. */
static bfd_boolean
-ppc64_elf_create_dynamic_sections (dynobj, info)
- bfd *dynobj;
- struct bfd_link_info *info;
+ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
- htab = ppc_hash_table (info);
- if (!htab->sgot && !create_got_section (dynobj, info))
- return FALSE;
-
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
return FALSE;
- htab->splt = bfd_get_section_by_name (dynobj, ".plt");
- htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
- htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
+ htab = ppc_hash_table (info);
+ if (!htab->got)
+ htab->got = bfd_get_section_by_name (dynobj, ".got");
+ htab->plt = bfd_get_section_by_name (dynobj, ".plt");
+ htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
+ htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
if (!info->shared)
- htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
+ htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
- if (!htab->splt || !htab->srelplt || !htab->sdynbss
- || (!info->shared && !htab->srelbss))
+ if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
+ || (!info->shared && !htab->relbss))
abort ();
return TRUE;
}
+/* Merge PLT info on FROM with that on TO. */
+
+static void
+move_plt_plist (struct ppc_link_hash_entry *from,
+ struct ppc_link_hash_entry *to)
+{
+ if (from->elf.plt.plist != NULL)
+ {
+ if (to->elf.plt.plist != NULL)
+ {
+ struct plt_entry **entp;
+ struct plt_entry *ent;
+
+ for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
+ {
+ struct plt_entry *dent;
+
+ for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
+ if (dent->addend == ent->addend)
+ {
+ dent->plt.refcount += ent->plt.refcount;
+ *entp = ent->next;
+ break;
+ }
+ if (dent == NULL)
+ entp = &ent->next;
+ }
+ *entp = to->elf.plt.plist;
+ }
+
+ to->elf.plt.plist = from->elf.plt.plist;
+ from->elf.plt.plist = NULL;
+ }
+}
+
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
-ppc64_elf_copy_indirect_symbol (bed, dir, ind)
- struct elf_backend_data *bed ATTRIBUTE_UNUSED;
- struct elf_link_hash_entry *dir, *ind;
+ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
{
struct ppc_link_hash_entry *edir, *eind;
- flagword mask;
edir = (struct ppc_link_hash_entry *) dir;
eind = (struct ppc_link_hash_entry *) ind;
struct ppc_dyn_relocs **pp;
struct ppc_dyn_relocs *p;
- if (eind->elf.root.type == bfd_link_hash_indirect)
- abort ();
-
- /* Add reloc counts against the weak sym to the strong sym
+ /* Add reloc counts against the indirect sym to the direct sym
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
edir->is_func |= eind->is_func;
edir->is_func_descriptor |= eind->is_func_descriptor;
- edir->is_entry |= eind->is_entry;
edir->tls_mask |= eind->tls_mask;
- mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
/* If called to transfer flags for a weakdef during processing
- of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
+ of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- if (ELIMINATE_COPY_RELOCS
- && eind->elf.root.type != bfd_link_hash_indirect
- && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
- mask &= ~ELF_LINK_NON_GOT_REF;
+ if (!(ELIMINATE_COPY_RELOCS
+ && eind->elf.root.type != bfd_link_hash_indirect
+ && edir->elf.dynamic_adjusted))
+ edir->elf.non_got_ref |= eind->elf.non_got_ref;
- edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
+ edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
+ edir->elf.ref_regular |= eind->elf.ref_regular;
+ edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
+ edir->elf.needs_plt |= eind->elf.needs_plt;
/* If we were called to copy over info for a weak sym, that's all. */
if (eind->elf.root.type != bfd_link_hash_indirect)
for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
if (dent->addend == ent->addend
+ && dent->owner == ent->owner
&& dent->tls_type == ent->tls_type)
{
dent->got.refcount += ent->got.refcount;
}
/* And plt entries. */
- if (eind->elf.plt.plist != NULL)
+ move_plt_plist (eind, edir);
+
+ if (eind->elf.dynindx != -1)
{
- if (edir->elf.plt.plist != NULL)
- {
- struct plt_entry **entp;
- struct plt_entry *ent;
+ if (edir->elf.dynindx != -1)
+ _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
+ edir->elf.dynstr_index);
+ edir->elf.dynindx = eind->elf.dynindx;
+ edir->elf.dynstr_index = eind->elf.dynstr_index;
+ eind->elf.dynindx = -1;
+ eind->elf.dynstr_index = 0;
+ }
+}
- for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
- {
- struct plt_entry *dent;
+/* Find the function descriptor hash entry from the given function code
+ hash entry FH. Link the entries via their OH fields. */
- for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
- if (dent->addend == ent->addend)
- {
- dent->plt.refcount += ent->plt.refcount;
- *entp = ent->next;
- break;
- }
- if (dent == NULL)
- entp = &ent->next;
- }
- *entp = edir->elf.plt.plist;
- }
+static struct ppc_link_hash_entry *
+get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
+{
+ struct ppc_link_hash_entry *fdh = fh->oh;
+
+ if (fdh == NULL)
+ {
+ const char *fd_name = fh->elf.root.root.string + 1;
- edir->elf.plt.plist = eind->elf.plt.plist;
- eind->elf.plt.plist = NULL;
+ fdh = (struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
+ if (fdh != NULL)
+ {
+ fdh->is_func_descriptor = 1;
+ fdh->oh = fh;
+ fh->is_func = 1;
+ fh->oh = fdh;
+ }
}
- if (edir->elf.dynindx == -1)
+ return fdh;
+}
+
+/* Make a fake function descriptor sym for the code sym FH. */
+
+static struct ppc_link_hash_entry *
+make_fdh (struct bfd_link_info *info,
+ struct ppc_link_hash_entry *fh)
+{
+ bfd *abfd;
+ asymbol *newsym;
+ struct bfd_link_hash_entry *bh;
+ struct ppc_link_hash_entry *fdh;
+
+ abfd = fh->elf.root.u.undef.abfd;
+ newsym = bfd_make_empty_symbol (abfd);
+ newsym->name = fh->elf.root.root.string + 1;
+ newsym->section = bfd_und_section_ptr;
+ newsym->value = 0;
+ newsym->flags = BSF_WEAK;
+
+ bh = NULL;
+ if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
+ newsym->flags, newsym->section,
+ newsym->value, NULL, FALSE, FALSE,
+ &bh))
+ return NULL;
+
+ fdh = (struct ppc_link_hash_entry *) bh;
+ fdh->elf.non_elf = 0;
+ fdh->fake = 1;
+ fdh->is_func_descriptor = 1;
+ fdh->oh = fh;
+ fh->is_func = 1;
+ fh->oh = fdh;
+ return fdh;
+}
+
+/* Fix function descriptor symbols defined in .opd sections to be
+ function type. */
+
+static bfd_boolean
+ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ Elf_Internal_Sym *isym,
+ const char **name ATTRIBUTE_UNUSED,
+ flagword *flags ATTRIBUTE_UNUSED,
+ asection **sec,
+ bfd_vma *value ATTRIBUTE_UNUSED)
+{
+ if (*sec != NULL
+ && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
+ isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
+
+ return TRUE;
+}
+
+/* This function makes an old ABI object reference to ".bar" cause the
+ inclusion of a new ABI object archive that defines "bar".
+ NAME is a symbol defined in an archive. Return a symbol in the hash
+ table that might be satisfied by the archive symbols. */
+
+static struct elf_link_hash_entry *
+ppc64_elf_archive_symbol_lookup (bfd *abfd,
+ struct bfd_link_info *info,
+ const char *name)
+{
+ struct elf_link_hash_entry *h;
+ char *dot_name;
+ size_t len;
+
+ h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
+ if (h != NULL
+ /* Don't return this sym if it is a fake function descriptor
+ created by add_symbol_adjust. */
+ && !(h->root.type == bfd_link_hash_undefweak
+ && ((struct ppc_link_hash_entry *) h)->fake))
+ return h;
+
+ if (name[0] == '.')
+ return h;
+
+ len = strlen (name);
+ dot_name = bfd_alloc (abfd, len + 2);
+ if (dot_name == NULL)
+ return (struct elf_link_hash_entry *) 0 - 1;
+ dot_name[0] = '.';
+ memcpy (dot_name + 1, name, len + 1);
+ h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
+ bfd_release (abfd, dot_name);
+ return h;
+}
+
+/* This function satisfies all old ABI object references to ".bar" if a
+ new ABI object defines "bar". Well, at least, undefined dot symbols
+ are made weak. This stops later archive searches from including an
+ object if we already have a function descriptor definition. It also
+ prevents the linker complaining about undefined symbols.
+ We also check and correct mismatched symbol visibility here. The
+ most restrictive visibility of the function descriptor and the
+ function entry symbol is used. */
+
+static bfd_boolean
+add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
+{
+ struct ppc_link_hash_table *htab;
+ struct ppc_link_hash_entry *fdh;
+
+ if (eh->elf.root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (eh->elf.root.type == bfd_link_hash_warning)
+ eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
+
+ if (eh->elf.root.root.string[0] != '.')
+ abort ();
+
+ htab = ppc_hash_table (info);
+ fdh = get_fdh (eh, htab);
+ if (fdh == NULL
+ && !info->relocatable
+ && (eh->elf.root.type == bfd_link_hash_undefined
+ || eh->elf.root.type == bfd_link_hash_undefweak)
+ && eh->elf.ref_regular)
{
- edir->elf.dynindx = eind->elf.dynindx;
- edir->elf.dynstr_index = eind->elf.dynstr_index;
- eind->elf.dynindx = -1;
- eind->elf.dynstr_index = 0;
+ /* Make an undefweak function descriptor sym, which is enough to
+ pull in an --as-needed shared lib, but won't cause link
+ errors. Archives are handled elsewhere. */
+ fdh = make_fdh (info, eh);
+ if (fdh == NULL)
+ return FALSE;
+ else
+ fdh->elf.ref_regular = 1;
}
- else
- BFD_ASSERT (eind->elf.dynindx == -1);
+ else if (fdh != NULL)
+ {
+ unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
+ unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
+ if (entry_vis < descr_vis)
+ fdh->elf.other += entry_vis - descr_vis;
+ else if (entry_vis > descr_vis)
+ eh->elf.other += descr_vis - entry_vis;
+
+ if ((fdh->elf.root.type == bfd_link_hash_defined
+ || fdh->elf.root.type == bfd_link_hash_defweak)
+ && eh->elf.root.type == bfd_link_hash_undefined)
+ {
+ eh->elf.root.type = bfd_link_hash_undefweak;
+ eh->was_undefined = 1;
+ htab->twiddled_syms = 1;
+ }
+ }
+
+ return TRUE;
}
-/* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
- symbols undefined on the command-line. */
+/* Process list of dot-symbols we made in link_hash_newfunc. */
-bfd_boolean
-ppc64_elf_mark_entry_syms (info)
- struct bfd_link_info *info;
+static bfd_boolean
+ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
- struct bfd_sym_chain *sym;
+ struct ppc_link_hash_entry **p, *eh;
htab = ppc_hash_table (info);
- for (sym = info->gc_sym_list; sym; sym = sym->next)
+ if (!is_ppc64_elf (info->output_bfd))
+ return TRUE;
+
+ if (is_ppc64_elf (ibfd))
{
- struct elf_link_hash_entry *h;
+ p = &htab->dot_syms;
+ while ((eh = *p) != NULL)
+ {
+ *p = NULL;
+ if (!add_symbol_adjust (eh, info))
+ return FALSE;
+ p = &eh->u.next_dot_sym;
+ }
+ }
- h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
- if (h != NULL)
- ((struct ppc_link_hash_entry *) h)->is_entry = 1;
+ /* Clear the list for non-ppc64 input files. */
+ p = &htab->dot_syms;
+ while ((eh = *p) != NULL)
+ {
+ *p = NULL;
+ p = &eh->u.next_dot_sym;
+ }
+
+ /* We need to fix the undefs list for any syms we have twiddled to
+ undef_weak. */
+ if (htab->twiddled_syms)
+ {
+ bfd_link_repair_undef_list (&htab->elf.root);
+ htab->twiddled_syms = 0;
}
return TRUE;
}
+/* Undo hash table changes when an --as-needed input file is determined
+ not to be needed. */
+
+static bfd_boolean
+ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ ppc_hash_table (info)->dot_syms = NULL;
+ return TRUE;
+}
+
static bfd_boolean
-update_local_sym_info (abfd, symtab_hdr, r_symndx, r_addend, tls_type)
- bfd *abfd;
- Elf_Internal_Shdr *symtab_hdr;
- unsigned long r_symndx;
- bfd_vma r_addend;
- int tls_type;
+update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
+ unsigned long r_symndx, bfd_vma r_addend, int tls_type)
{
struct got_entry **local_got_ents = elf_local_got_ents (abfd);
char *local_got_tls_masks;
bfd_size_type size = symtab_hdr->sh_info;
size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
- local_got_ents = (struct got_entry **) bfd_zalloc (abfd, size);
+ local_got_ents = bfd_zalloc (abfd, size);
if (local_got_ents == NULL)
return FALSE;
elf_local_got_ents (abfd) = local_got_ents;
struct got_entry *ent;
for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
- if (ent->addend == r_addend && ent->tls_type == tls_type)
+ if (ent->addend == r_addend
+ && ent->owner == abfd
+ && ent->tls_type == tls_type)
break;
if (ent == NULL)
{
bfd_size_type amt = sizeof (*ent);
- ent = (struct got_entry *) bfd_alloc (abfd, amt);
+ ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
ent->next = local_got_ents[r_symndx];
ent->addend = r_addend;
+ ent->owner = abfd;
ent->tls_type = tls_type;
ent->got.refcount = 0;
local_got_ents[r_symndx] = ent;
}
static bfd_boolean
-update_plt_info (abfd, eh, addend)
- bfd *abfd;
- struct ppc_link_hash_entry *eh;
- bfd_vma addend;
+update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
{
struct plt_entry *ent;
if (ent == NULL)
{
bfd_size_type amt = sizeof (*ent);
- ent = (struct plt_entry *) bfd_alloc (abfd, amt);
+ ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
ent->next = eh->elf.plt.plist;
eh->elf.plt.plist = ent;
}
ent->plt.refcount += 1;
- eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
- eh->is_func = 1;
+ eh->elf.needs_plt = 1;
+ if (eh->elf.root.root.string[0] == '.'
+ && eh->elf.root.root.string[1] != '\0')
+ eh->is_func = 1;
return TRUE;
}
linkage table, and dynamic reloc sections. */
static bfd_boolean
-ppc64_elf_check_relocs (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
+ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, const Elf_Internal_Rela *relocs)
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
asection *sreloc;
asection **opd_sym_map;
- if (info->relocateable)
+ if (info->relocatable)
+ return TRUE;
+
+ /* Don't do anything special with non-loaded, non-alloced sections.
+ In particular, any relocs in such sections should not affect GOT
+ and PLT reference counting (ie. we don't allow them to create GOT
+ or PLT entries), there's no possibility or desire to optimize TLS
+ relocs, and there's not much point in propagating relocs to shared
+ libs that the dynamic linker won't relocate. */
+ if ((sec->flags & SEC_ALLOC) == 0)
return TRUE;
+ BFD_ASSERT (is_ppc64_elf (abfd));
+
htab = ppc_hash_table (info);
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (abfd);
sym_hashes = elf_sym_hashes (abfd);
sym_hashes_end = (sym_hashes
if we reference an .opd symbol (a function descriptor), we
want to keep the function code symbol's section. This is
easy for global symbols, but for local syms we need to keep
- information about the associated function section. Later, if
- edit_opd deletes entries, we'll use this array to adjust
- local syms in .opd. */
- union opd_info {
- asection *func_section;
- long entry_adjust;
- };
+ information about the associated function section. */
bfd_size_type amt;
- amt = sec->_raw_size * sizeof (union opd_info) / 24;
- opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
+ amt = sec->size * sizeof (*opd_sym_map) / 8;
+ opd_sym_map = bfd_zalloc (abfd, amt);
if (opd_sym_map == NULL)
return FALSE;
- ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
+ ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
+ BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
+ ppc64_elf_section_data (sec)->sec_type = sec_opd;
}
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
if (htab->sfpr == NULL
&& !create_linkage_sections (htab->elf.dynobj, info))
return FALSE;
struct elf_link_hash_entry *h;
enum elf_ppc64_reloc_type r_type;
int tls_type = 0;
+ struct _ppc64_elf_section_data *ppc64_sec;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ }
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
+ r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
- htab->tlsld_got.refcount += 1;
tls_type = TLS_TLS | TLS_LD;
goto dogottls;
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_TPREL16_HI:
case R_PPC64_GOT_TPREL16_HA:
- if (info->shared)
+ if (!info->executable)
info->flags |= DF_STATIC_TLS;
tls_type = TLS_TLS | TLS_TPREL;
goto dogottls;
case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_LO_DS:
/* This symbol requires a global offset table entry. */
- sec->has_gp_reloc = 1;
- if (htab->sgot == NULL
- && !create_got_section (htab->elf.dynobj, info))
+ sec->has_toc_reloc = 1;
+ if (ppc64_elf_tdata (abfd)->got == NULL
+ && !create_got_section (abfd, info))
return FALSE;
if (h != NULL)
eh = (struct ppc_link_hash_entry *) h;
for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
+ && ent->owner == abfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
{
bfd_size_type amt = sizeof (*ent);
- ent = (struct got_entry *) bfd_alloc (abfd, amt);
+ ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
ent->next = eh->elf.got.glist;
ent->addend = rel->r_addend;
+ ent->owner = abfd;
ent->tls_type = tls_type;
ent->got.refcount = 0;
eh->elf.got.glist = ent;
case R_PPC64_TOC16_HA:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
- sec->has_gp_reloc = 1;
+ sec->has_toc_reloc = 1;
break;
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_PPC64_GNU_VTINHERIT:
- if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_PPC64_GNU_VTENTRY:
- if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ BFD_ASSERT (h != NULL);
+ if (h != NULL
+ && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
case R_PPC64_REL14:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL14_BRNTAKEN:
- htab->has_14bit_branch = 1;
+ {
+ asection *dest = NULL;
+
+ /* Heuristic: If jumping outside our section, chances are
+ we are going to need a stub. */
+ if (h != NULL)
+ {
+ /* If the sym is weak it may be overridden later, so
+ don't assume we know where a weak sym lives. */
+ if (h->root.type == bfd_link_hash_defined)
+ dest = h->root.u.def.section;
+ }
+ else
+ dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
+ sec, r_symndx);
+ if (dest != sec)
+ ppc64_elf_section_data (sec)->has_14bit_branch = 1;
+ }
/* Fall through. */
case R_PPC64_REL24:
- if (h != NULL
- && h->root.root.string[0] == '.'
- && h->root.root.string[1] != 0)
+ if (h != NULL)
{
/* We may need a .plt entry if the function this reloc
refers to is in a shared lib. */
if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
rel->r_addend))
return FALSE;
- if (h == htab->tls_get_addr)
+ if (h == &htab->tls_get_addr->elf
+ || h == &htab->tls_get_addr_fd->elf)
sec->has_tls_reloc = 1;
- else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
- == 0)
+ else if (htab->tls_get_addr == NULL
+ && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
&& (h->root.root.string[15] == 0
|| h->root.root.string[15] == '@'))
{
- htab->tls_get_addr = h;
+ htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
+ sec->has_tls_reloc = 1;
+ }
+ else if (htab->tls_get_addr_fd == NULL
+ && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
+ && (h->root.root.string[14] == 0
+ || h->root.root.string[14] == '@'))
+ {
+ htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
sec->has_tls_reloc = 1;
}
}
case R_PPC64_TPREL64:
tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
- if (info->shared)
+ if (!info->executable)
info->flags |= DF_STATIC_TLS;
goto dotlstoc;
rel->r_addend, tls_type))
return FALSE;
- if (ppc64_elf_section_data (sec)->t_symndx == NULL)
+ ppc64_sec = ppc64_elf_section_data (sec);
+ if (ppc64_sec->sec_type != sec_toc)
{
/* One extra to simplify get_tls_mask. */
- bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
- ppc64_elf_section_data (sec)->t_symndx
- = (unsigned *) bfd_zalloc (abfd, amt);
- if (ppc64_elf_section_data (sec)->t_symndx == NULL)
+ bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
+ ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
+ if (ppc64_sec->u.t_symndx == NULL)
return FALSE;
+ BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
+ ppc64_sec->sec_type = sec_toc;
}
BFD_ASSERT (rel->r_offset % 8 == 0);
- ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
+ ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
/* Mark the second slot of a GD or LD entry.
-1 to indicate GD and -2 to indicate LD. */
if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
- ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
+ ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
- ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
+ ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
goto dodyn;
case R_PPC64_TPREL16:
case R_PPC64_TPREL16_HIGHESTA:
if (info->shared)
{
- info->flags |= DF_STATIC_TLS;
+ if (!info->executable)
+ info->flags |= DF_STATIC_TLS;
goto dodyn;
}
break;
case R_PPC64_ADDR64:
if (opd_sym_map != NULL
- && h != NULL
- && h->root.root.string[0] == '.'
- && h->root.root.string[1] != 0)
+ && rel + 1 < rel_end
+ && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
{
- struct elf_link_hash_entry *fdh;
-
- fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
- FALSE, FALSE, FALSE);
- if (fdh != NULL)
+ if (h != NULL)
{
- ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
- ((struct ppc_link_hash_entry *) fdh)->oh = h;
- ((struct ppc_link_hash_entry *) h)->is_func = 1;
- ((struct ppc_link_hash_entry *) h)->oh = fdh;
+ if (h->root.root.string[0] == '.'
+ && h->root.root.string[1] != 0
+ && get_fdh ((struct ppc_link_hash_entry *) h, htab))
+ ;
+ else
+ ((struct ppc_link_hash_entry *) h)->is_func = 1;
}
- }
- if (opd_sym_map != NULL
- && h == NULL
- && rel + 1 < rel_end
- && ((enum elf_ppc64_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
- == R_PPC64_TOC))
- {
- asection *s;
+ else
+ {
+ asection *s;
- s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
- r_symndx);
- if (s == NULL)
- return FALSE;
- else if (s != sec)
- opd_sym_map[rel->r_offset / 24] = s;
+ s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
+ r_symndx);
+ if (s == NULL)
+ return FALSE;
+ else if (s != sec)
+ opd_sym_map[rel->r_offset / 8] = s;
+ }
}
/* Fall through. */
case R_PPC64_TOC:
if (h != NULL && !info->shared)
/* We may need a copy reloc. */
- h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
+ h->non_got_ref = 1;
/* Don't propagate .opd relocs. */
if (NO_OPD_RELOCS && opd_sym_map != NULL)
break;
- /* Don't propagate relocs that the dynamic linker won't relocate. */
- if ((sec->flags & SEC_ALLOC) == 0)
- break;
-
/* If we are creating a shared library, and this is a reloc
against a global symbol, or a non PC relative reloc
against a local symbol, then we need to copy the reloc
symbol. */
dodyn:
if ((info->shared
- && (MUST_BE_DYN_RELOC (r_type)
+ && (must_be_dyn_reloc (info, r_type)
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ || !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)))
+ || !h->def_regular)))
{
struct ppc_dyn_relocs *p;
struct ppc_dyn_relocs **head;
if (name == NULL)
return FALSE;
- if (strncmp (name, ".rela", 5) != 0
+ if (! CONST_STRNEQ (name, ".rela")
|| strcmp (bfd_get_section_name (abfd, sec),
name + 5) != 0)
{
(*_bfd_error_handler)
- (_("%s: bad relocation section name `%s\'"),
- bfd_archive_filename (abfd), name);
+ (_("%B: bad relocation section name `%s\'"),
+ abfd, name);
bfd_set_error (bfd_error_bad_value);
}
{
flagword flags;
- sreloc = bfd_make_section (dynobj, name);
flags = (SEC_HAS_CONTENTS | SEC_READONLY
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- if ((sec->flags & SEC_ALLOC) != 0)
- flags |= SEC_ALLOC | SEC_LOAD;
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_ALLOC | SEC_LOAD);
+ sreloc = bfd_make_section_with_flags (dynobj,
+ name,
+ flags);
if (sreloc == NULL
- || ! bfd_set_section_flags (dynobj, sreloc, flags)
|| ! bfd_set_section_alignment (dynobj, sreloc, 3))
return FALSE;
}
easily. Oh well. */
asection *s;
+ void *vpp;
+
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (s == NULL)
return FALSE;
- head = ((struct ppc_dyn_relocs **)
- &elf_section_data (s)->local_dynrel);
+ vpp = &elf_section_data (s)->local_dynrel;
+ head = (struct ppc_dyn_relocs **) vpp;
}
p = *head;
if (p == NULL || p->sec != sec)
{
- p = ((struct ppc_dyn_relocs *)
- bfd_alloc (htab->elf.dynobj,
- (bfd_size_type) sizeof *p));
+ p = bfd_alloc (htab->elf.dynobj, sizeof *p);
if (p == NULL)
return FALSE;
p->next = *head;
}
p->count += 1;
- if (!MUST_BE_DYN_RELOC (r_type))
+ if (!must_be_dyn_reloc (info, r_type))
p->pc_count += 1;
}
break;
return TRUE;
}
+/* OFFSET in OPD_SEC specifies a function descriptor. Return the address
+ of the code entry point, and its section. */
+
+static bfd_vma
+opd_entry_value (asection *opd_sec,
+ bfd_vma offset,
+ asection **code_sec,
+ bfd_vma *code_off)
+{
+ bfd *opd_bfd = opd_sec->owner;
+ Elf_Internal_Rela *relocs;
+ Elf_Internal_Rela *lo, *hi, *look;
+ bfd_vma val;
+
+ /* No relocs implies we are linking a --just-symbols object. */
+ if (opd_sec->reloc_count == 0)
+ {
+ bfd_vma val;
+
+ if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
+ return (bfd_vma) -1;
+
+ if (code_sec != NULL)
+ {
+ asection *sec, *likely = NULL;
+ for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
+ if (sec->vma <= val
+ && (sec->flags & SEC_LOAD) != 0
+ && (sec->flags & SEC_ALLOC) != 0)
+ likely = sec;
+ if (likely != NULL)
+ {
+ *code_sec = likely;
+ if (code_off != NULL)
+ *code_off = val - likely->vma;
+ }
+ }
+ return val;
+ }
+
+ BFD_ASSERT (is_ppc64_elf (opd_bfd));
+
+ relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
+ if (relocs == NULL)
+ relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
+
+ /* Go find the opd reloc at the sym address. */
+ lo = relocs;
+ BFD_ASSERT (lo != NULL);
+ hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
+ val = (bfd_vma) -1;
+ while (lo < hi)
+ {
+ look = lo + (hi - lo) / 2;
+ if (look->r_offset < offset)
+ lo = look + 1;
+ else if (look->r_offset > offset)
+ hi = look;
+ else
+ {
+ Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
+
+ if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
+ && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
+ {
+ unsigned long symndx = ELF64_R_SYM (look->r_info);
+ asection *sec;
+
+ if (symndx < symtab_hdr->sh_info)
+ {
+ Elf_Internal_Sym *sym;
+
+ sym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (sym == NULL)
+ {
+ sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
+ symtab_hdr->sh_info,
+ 0, NULL, NULL, NULL);
+ if (sym == NULL)
+ break;
+ symtab_hdr->contents = (bfd_byte *) sym;
+ }
+
+ sym += symndx;
+ val = sym->st_value;
+ sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
+ BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
+ }
+ else
+ {
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry *rh;
+
+ sym_hashes = elf_sym_hashes (opd_bfd);
+ rh = sym_hashes[symndx - symtab_hdr->sh_info];
+ while (rh->root.type == bfd_link_hash_indirect
+ || rh->root.type == bfd_link_hash_warning)
+ rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
+ BFD_ASSERT (rh->root.type == bfd_link_hash_defined
+ || rh->root.type == bfd_link_hash_defweak);
+ val = rh->root.u.def.value;
+ sec = rh->root.u.def.section;
+ }
+ val += look->r_addend;
+ if (code_off != NULL)
+ *code_off = val;
+ if (code_sec != NULL)
+ *code_sec = sec;
+ if (sec != NULL && sec->output_section != NULL)
+ val += sec->output_section->vma + sec->output_offset;
+ }
+ break;
+ }
+ }
+
+ return val;
+}
+
+/* Mark all our entry sym sections, both opd and code section. */
+
+static void
+ppc64_elf_gc_keep (struct bfd_link_info *info)
+{
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ struct bfd_sym_chain *sym;
+
+ for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
+ {
+ struct ppc_link_hash_entry *eh;
+ asection *sec;
+
+ eh = (struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
+ if (eh == NULL)
+ continue;
+ if (eh->elf.root.type != bfd_link_hash_defined
+ && eh->elf.root.type != bfd_link_hash_defweak)
+ continue;
+
+ if (eh->is_func_descriptor
+ && (eh->oh->elf.root.type == bfd_link_hash_defined
+ || eh->oh->elf.root.type == bfd_link_hash_defweak))
+ {
+ sec = eh->oh->elf.root.u.def.section;
+ sec->flags |= SEC_KEEP;
+ }
+ else if (get_opd_info (eh->elf.root.u.def.section) != NULL
+ && opd_entry_value (eh->elf.root.u.def.section,
+ eh->elf.root.u.def.value,
+ &sec, NULL) != (bfd_vma) -1)
+ sec->flags |= SEC_KEEP;
+
+ sec = eh->elf.root.u.def.section;
+ sec->flags |= SEC_KEEP;
+ }
+}
+
+/* Mark sections containing dynamically referenced symbols. When
+ building shared libraries, we must assume that any visible symbol is
+ referenced. */
+
+static bfd_boolean
+ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
+{
+ struct bfd_link_info *info = (struct bfd_link_info *) inf;
+ struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
+
+ if (eh->elf.root.type == bfd_link_hash_warning)
+ eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
+
+ /* Dynamic linking info is on the func descriptor sym. */
+ if (eh->oh != NULL
+ && eh->oh->is_func_descriptor
+ && (eh->oh->elf.root.type == bfd_link_hash_defined
+ || eh->oh->elf.root.type == bfd_link_hash_defweak))
+ eh = eh->oh;
+
+ if ((eh->elf.root.type == bfd_link_hash_defined
+ || eh->elf.root.type == bfd_link_hash_defweak)
+ && (eh->elf.ref_dynamic
+ || (!info->executable
+ && eh->elf.def_regular
+ && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
+ && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
+ {
+ asection *code_sec;
+
+ eh->elf.root.u.def.section->flags |= SEC_KEEP;
+
+ /* Function descriptor syms cause the associated
+ function code sym section to be marked. */
+ if (eh->is_func_descriptor
+ && (eh->oh->elf.root.type == bfd_link_hash_defined
+ || eh->oh->elf.root.type == bfd_link_hash_defweak))
+ eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
+ else if (get_opd_info (eh->elf.root.u.def.section) != NULL
+ && opd_entry_value (eh->elf.root.u.def.section,
+ eh->elf.root.u.def.value,
+ &code_sec, NULL) != (bfd_vma) -1)
+ code_sec->flags |= SEC_KEEP;
+ }
+
+ return TRUE;
+}
+
/* Return the section that should be marked against GC for a given
relocation. */
static asection *
-ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
- asection *sec;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- Elf_Internal_Rela *rel;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+ppc64_elf_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
- asection *rsec = NULL;
+ asection *rsec;
+
+ /* Syms return NULL if we're marking .opd, so we avoid marking all
+ function sections, as all functions are referenced in .opd. */
+ rsec = NULL;
+ if (get_opd_info (sec) != NULL)
+ return rsec;
if (h != NULL)
{
enum elf_ppc64_reloc_type r_type;
- struct ppc_link_hash_entry *fdh;
+ struct ppc_link_hash_entry *eh;
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
+ r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_GNU_VTINHERIT:
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
- fdh = (struct ppc_link_hash_entry *) h;
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh->oh != NULL
+ && eh->oh->is_func_descriptor
+ && (eh->oh->elf.root.type == bfd_link_hash_defined
+ || eh->oh->elf.root.type == bfd_link_hash_defweak))
+ eh = eh->oh;
/* Function descriptor syms cause the associated
function code sym section to be marked. */
- if (fdh->is_func_descriptor)
- rsec = fdh->oh->root.u.def.section;
-
- /* Function entry syms return NULL if they are in .opd
- and are not ._start (or others undefined on the ld
- command line). Thus we avoid marking all function
- sections, as all functions are referenced in .opd. */
- else if ((fdh->oh != NULL
- && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
- || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
+ if (eh->is_func_descriptor
+ && (eh->oh->elf.root.type == bfd_link_hash_defined
+ || eh->oh->elf.root.type == bfd_link_hash_defweak))
+ {
+ /* They also mark their opd section. */
+ eh->elf.root.u.def.section->gc_mark = 1;
+
+ rsec = eh->oh->elf.root.u.def.section;
+ }
+ else if (get_opd_info (eh->elf.root.u.def.section) != NULL
+ && opd_entry_value (eh->elf.root.u.def.section,
+ eh->elf.root.u.def.value,
+ &rsec, NULL) != (bfd_vma) -1)
+ eh->elf.root.u.def.section->gc_mark = 1;
+ else
rsec = h->root.u.def.section;
break;
}
else
{
- asection **opd_sym_section;
+ struct _opd_sec_data *opd;
rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
- opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
- if (opd_sym_section != NULL)
- rsec = opd_sym_section[sym->st_value / 24];
- else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
- rsec = NULL;
+ opd = get_opd_info (rsec);
+ if (opd != NULL && opd->func_sec != NULL)
+ {
+ rsec->gc_mark = 1;
+
+ rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
+ }
}
return rsec;
section being removed. */
static bfd_boolean
-ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
+ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, const Elf_Internal_Rela *relocs)
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct got_entry **local_got_ents;
const Elf_Internal_Rela *rel, *relend;
+ if (info->relocatable)
+ return TRUE;
+
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
+
elf_section_data (sec)->local_dynrel = NULL;
htab = ppc_hash_table (info);
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (abfd);
sym_hashes = elf_sym_hashes (abfd);
local_got_ents = elf_local_got_ents (abfd);
char tls_type = 0;
r_symndx = ELF64_R_SYM (rel->r_info);
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
+ r_type = ELF64_R_TYPE (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct ppc_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
- htab->tlsld_got.refcount -= 1;
tls_type = TLS_TLS | TLS_LD;
goto dogot;
else
ent = local_got_ents[r_symndx];
- for (; ent != NULL; ent = ent->next)
- if (ent->addend == rel->r_addend
- && ent->tls_type == tls_type)
- break;
- if (ent == NULL)
- abort ();
- if (ent->got.refcount > 0)
- ent->got.refcount -= 1;
- }
- break;
+ for (; ent != NULL; ent = ent->next)
+ if (ent->addend == rel->r_addend
+ && ent->owner == abfd
+ && ent->tls_type == tls_type)
+ break;
+ if (ent == NULL)
+ abort ();
+ if (ent->got.refcount > 0)
+ ent->got.refcount -= 1;
+ }
+ break;
+
+ case R_PPC64_PLT16_HA:
+ case R_PPC64_PLT16_HI:
+ case R_PPC64_PLT16_LO:
+ case R_PPC64_PLT32:
+ case R_PPC64_PLT64:
+ case R_PPC64_REL14:
+ case R_PPC64_REL14_BRNTAKEN:
+ case R_PPC64_REL14_BRTAKEN:
+ case R_PPC64_REL24:
+ if (h != NULL)
+ {
+ struct plt_entry *ent;
+
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->addend == rel->r_addend)
+ break;
+ if (ent == NULL)
+ abort ();
+ if (ent->plt.refcount > 0)
+ ent->plt.refcount -= 1;
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ return TRUE;
+}
+
+/* The maximum size of .sfpr. */
+#define SFPR_MAX (218*4)
+
+struct sfpr_def_parms
+{
+ const char name[12];
+ unsigned char lo, hi;
+ bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
+ bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
+};
+
+/* Auto-generate _save*, _rest* functions in .sfpr. */
+
+static unsigned int
+sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
+{
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ unsigned int i;
+ size_t len = strlen (parm->name);
+ bfd_boolean writing = FALSE;
+ char sym[16];
+
+ memcpy (sym, parm->name, len);
+ sym[len + 2] = 0;
+
+ for (i = parm->lo; i <= parm->hi; i++)
+ {
+ struct elf_link_hash_entry *h;
+
+ sym[len + 0] = i / 10 + '0';
+ sym[len + 1] = i % 10 + '0';
+ h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
+ if (h != NULL
+ && !h->def_regular)
+ {
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = htab->sfpr;
+ h->root.u.def.value = htab->sfpr->size;
+ h->type = STT_FUNC;
+ h->def_regular = 1;
+ _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
+ writing = TRUE;
+ if (htab->sfpr->contents == NULL)
+ {
+ htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
+ if (htab->sfpr->contents == NULL)
+ return FALSE;
+ }
+ }
+ if (writing)
+ {
+ bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
+ if (i != parm->hi)
+ p = (*parm->write_ent) (htab->elf.dynobj, p, i);
+ else
+ p = (*parm->write_tail) (htab->elf.dynobj, p, i);
+ htab->sfpr->size = p - htab->sfpr->contents;
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_byte *
+savegpr0 (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
+ return p + 4;
+}
+
+static bfd_byte *
+savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = savegpr0 (abfd, p, r);
+ bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
+ p = p + 4;
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restgpr0 (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
+ p = p + 4;
+ p = restgpr0 (abfd, p, r);
+ bfd_put_32 (abfd, MTLR_R0, p);
+ p = p + 4;
+ if (r == 29)
+ {
+ p = restgpr0 (abfd, p, 30);
+ p = restgpr0 (abfd, p, 31);
+ }
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+savegpr1 (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
+ return p + 4;
+}
+
+static bfd_byte *
+savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = savegpr1 (abfd, p, r);
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restgpr1 (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = restgpr1 (abfd, p, r);
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+savefpr (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
+ return p + 4;
+}
+
+static bfd_byte *
+savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = savefpr (abfd, p, r);
+ bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
+ p = p + 4;
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restfpr (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
+ p = p + 4;
+ p = restfpr (abfd, p, r);
+ bfd_put_32 (abfd, MTLR_R0, p);
+ p = p + 4;
+ if (r == 29)
+ {
+ p = restfpr (abfd, p, 30);
+ p = restfpr (abfd, p, 31);
+ }
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = savefpr (abfd, p, r);
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
+
+static bfd_byte *
+restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = restfpr (abfd, p, r);
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
- case R_PPC64_PLT16_HA:
- case R_PPC64_PLT16_HI:
- case R_PPC64_PLT16_LO:
- case R_PPC64_PLT32:
- case R_PPC64_PLT64:
- case R_PPC64_REL14:
- case R_PPC64_REL14_BRNTAKEN:
- case R_PPC64_REL14_BRTAKEN:
- case R_PPC64_REL24:
- if (h != NULL)
- {
- struct plt_entry *ent;
+static bfd_byte *
+savevr (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
+ p = p + 4;
+ bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
+ return p + 4;
+}
- for (ent = h->plt.plist; ent != NULL; ent = ent->next)
- if (ent->addend == rel->r_addend)
- break;
- if (ent == NULL)
- abort ();
- if (ent->plt.refcount > 0)
- ent->plt.refcount -= 1;
- }
- break;
+static bfd_byte *
+savevr_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = savevr (abfd, p, r);
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
+}
- default:
- break;
- }
- }
- return TRUE;
+static bfd_byte *
+restvr (bfd *abfd, bfd_byte *p, int r)
+{
+ bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
+ p = p + 4;
+ bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
+ return p + 4;
+}
+
+static bfd_byte *
+restvr_tail (bfd *abfd, bfd_byte *p, int r)
+{
+ p = restvr (abfd, p, r);
+ bfd_put_32 (abfd, BLR, p);
+ return p + 4;
}
/* Called via elf_link_hash_traverse to transfer dynamic linking
information on function code symbol entries to their corresponding
function descriptor symbol entries. */
+
static bfd_boolean
-func_desc_adjust (h, inf)
- struct elf_link_hash_entry *h;
- PTR inf;
+func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
struct plt_entry *ent;
+ struct ppc_link_hash_entry *fh;
+ struct ppc_link_hash_entry *fdh;
+ bfd_boolean force_local;
- if (h->root.type == bfd_link_hash_indirect)
+ fh = (struct ppc_link_hash_entry *) h;
+ if (fh->elf.root.type == bfd_link_hash_indirect)
return TRUE;
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ if (fh->elf.root.type == bfd_link_hash_warning)
+ fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
- info = (struct bfd_link_info *) inf;
+ info = inf;
htab = ppc_hash_table (info);
+ /* Resolve undefined references to dot-symbols as the value
+ in the function descriptor, if we have one in a regular object.
+ This is to satisfy cases like ".quad .foo". Calls to functions
+ in dynamic objects are handled elsewhere. */
+ if (fh->elf.root.type == bfd_link_hash_undefweak
+ && fh->was_undefined
+ && (fh->oh->elf.root.type == bfd_link_hash_defined
+ || fh->oh->elf.root.type == bfd_link_hash_defweak)
+ && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
+ && opd_entry_value (fh->oh->elf.root.u.def.section,
+ fh->oh->elf.root.u.def.value,
+ &fh->elf.root.u.def.section,
+ &fh->elf.root.u.def.value) != (bfd_vma) -1)
+ {
+ fh->elf.root.type = fh->oh->elf.root.type;
+ fh->elf.forced_local = 1;
+ fh->elf.def_regular = fh->oh->elf.def_regular;
+ fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
+ }
+
/* If this is a function code symbol, transfer dynamic linking
information to the function descriptor symbol. */
- if (!((struct ppc_link_hash_entry *) h)->is_func)
+ if (!fh->is_func)
return TRUE;
- if (h->root.type == bfd_link_hash_undefweak
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
- htab->have_undefweak = TRUE;
-
- for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.refcount > 0)
break;
- if (ent != NULL
- && h->root.root.string[0] == '.'
- && h->root.root.string[1] != '\0')
- {
- struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
- bfd_boolean force_local;
+ if (ent == NULL
+ || fh->elf.root.root.string[0] != '.'
+ || fh->elf.root.root.string[1] == '\0')
+ return TRUE;
+
+ /* Find the corresponding function descriptor symbol. Create it
+ as undefined if necessary. */
- /* Find the corresponding function descriptor symbol. Create it
- as undefined if necessary. */
+ fdh = get_fdh (fh, htab);
+ if (fdh != NULL)
+ while (fdh->elf.root.type == bfd_link_hash_indirect
+ || fdh->elf.root.type == bfd_link_hash_warning)
+ fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
+ if (fdh == NULL
+ && info->shared
+ && (fh->elf.root.type == bfd_link_hash_undefined
+ || fh->elf.root.type == bfd_link_hash_undefweak))
+ {
+ fdh = make_fdh (info, fh);
if (fdh == NULL)
- fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
- FALSE, FALSE, TRUE);
-
- if (fdh == NULL
- && info->shared
- && (h->root.type == bfd_link_hash_undefined
- || h->root.type == bfd_link_hash_undefweak))
- {
- bfd *abfd;
- asymbol *newsym;
- struct bfd_link_hash_entry *bh;
-
- abfd = h->root.u.undef.abfd;
- newsym = bfd_make_empty_symbol (abfd);
- newsym->name = h->root.root.string + 1;
- newsym->section = bfd_und_section_ptr;
- newsym->value = 0;
- newsym->flags = BSF_OBJECT;
- if (h->root.type == bfd_link_hash_undefweak)
- newsym->flags |= BSF_WEAK;
-
- bh = &fdh->root;
- if ( !(_bfd_generic_link_add_one_symbol
- (info, abfd, newsym->name, newsym->flags,
- newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
- {
- return FALSE;
- }
- fdh = (struct elf_link_hash_entry *) bh;
- fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
+ return FALSE;
+ }
+
+ /* Fake function descriptors are made undefweak. If the function
+ code symbol is strong undefined, make the fake sym the same.
+ If the function code symbol is defined, then force the fake
+ descriptor local; We can't support overriding of symbols in a
+ shared library on a fake descriptor. */
+
+ if (fdh != NULL
+ && fdh->fake
+ && fdh->elf.root.type == bfd_link_hash_undefweak)
+ {
+ if (fh->elf.root.type == bfd_link_hash_undefined)
+ {
+ fdh->elf.root.type = bfd_link_hash_undefined;
+ bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
}
+ else if (fh->elf.root.type == bfd_link_hash_defined
+ || fh->elf.root.type == bfd_link_hash_defweak)
+ {
+ _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
+ }
+ }
- if (fdh != NULL
- && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
- && (info->shared
- || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
+ if (fdh != NULL
+ && !fdh->elf.forced_local
+ && (info->shared
+ || fdh->elf.def_dynamic
+ || fdh->elf.ref_dynamic
+ || (fdh->elf.root.type == bfd_link_hash_undefweak
+ && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
+ {
+ if (fdh->elf.dynindx == -1)
+ if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
+ return FALSE;
+ fdh->elf.ref_regular |= fh->elf.ref_regular;
+ fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
+ fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
+ fdh->elf.non_got_ref |= fh->elf.non_got_ref;
+ if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
{
- if (fdh->dynindx == -1)
- if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
- return FALSE;
- fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
- & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_DYNAMIC
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK
- | ELF_LINK_NON_GOT_REF));
- if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
- {
- fdh->plt.plist = h->plt.plist;
- fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
- }
- ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
- ((struct ppc_link_hash_entry *) fdh)->oh = h;
- ((struct ppc_link_hash_entry *) h)->oh = fdh;
- }
-
- /* Now that the info is on the function descriptor, clear the
- function code sym info. Any function code syms for which we
- don't have a definition in a regular file, we force local.
- This prevents a shared library from exporting syms that have
- been imported from another library. Function code syms that
- are really in the library we must leave global to prevent the
- linker dragging in a definition from a static library. */
- force_local = (info->shared
- && ((h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0
- || fdh == NULL
- || (fdh->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0
- || (fdh->elf_link_hash_flags
- & ELF_LINK_FORCED_LOCAL) != 0));
- _bfd_elf_link_hash_hide_symbol (info, h, force_local);
+ move_plt_plist (fh, fdh);
+ fdh->elf.needs_plt = 1;
+ }
+ fdh->is_func_descriptor = 1;
+ fdh->oh = fh;
+ fh->oh = fdh;
}
+ /* Now that the info is on the function descriptor, clear the
+ function code sym info. Any function code syms for which we
+ don't have a definition in a regular file, we force local.
+ This prevents a shared library from exporting syms that have
+ been imported from another library. Function code syms that
+ are really in the library we must leave global to prevent the
+ linker dragging in a definition from a static library. */
+ force_local = (!fh->elf.def_regular
+ || fdh == NULL
+ || !fdh->elf.def_regular
+ || fdh->elf.forced_local);
+ _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
+
return TRUE;
}
-#define MIN_SAVE_FPR 14
-#define MAX_SAVE_FPR 31
-
/* Called near the start of bfd_elf_size_dynamic_sections. We use
this hook to a) provide some gcc support functions, and b) transfer
dynamic linking information gathered so far on function code symbol
entries, to their corresponding function descriptor symbol entries. */
+
static bfd_boolean
-ppc64_elf_func_desc_adjust (obfd, info)
- bfd *obfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
+ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
- unsigned int lowest_savef = MAX_SAVE_FPR + 2;
- unsigned int lowest_restf = MAX_SAVE_FPR + 2;
unsigned int i;
- struct elf_link_hash_entry *h;
- bfd_byte *p;
- char sym[10];
+ const struct sfpr_def_parms funcs[] =
+ {
+ { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
+ { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
+ { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
+ { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
+ { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
+ { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
+ { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
+ { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
+ { "._savef", 14, 31, savefpr, savefpr1_tail },
+ { "._restf", 14, 31, restfpr, restfpr1_tail },
+ { "_savevr_", 20, 31, savevr, savevr_tail },
+ { "_restvr_", 20, 31, restvr, restvr_tail }
+ };
htab = ppc_hash_table (info);
-
if (htab->sfpr == NULL)
/* We don't have any relocs. */
return TRUE;
- /* First provide any missing ._savef* and ._restf* functions. */
- memcpy (sym, "._savef14", 10);
- for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
- {
- sym[7] = i / 10 + '0';
- sym[8] = i % 10 + '0';
- h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
- if (h != NULL
- && h->root.type == bfd_link_hash_undefined)
- {
- if (lowest_savef > i)
- lowest_savef = i;
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = htab->sfpr;
- h->root.u.def.value = (i - lowest_savef) * 4;
- h->type = STT_FUNC;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
- }
- }
-
- memcpy (sym, "._restf14", 10);
- for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
- {
- sym[7] = i / 10 + '0';
- sym[8] = i % 10 + '0';
- h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
- if (h != NULL
- && h->root.type == bfd_link_hash_undefined)
- {
- if (lowest_restf > i)
- lowest_restf = i;
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = htab->sfpr;
- h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
- + (i - lowest_restf) * 4);
- h->type = STT_FUNC;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- _bfd_elf_link_hash_hide_symbol (info, h, info->shared);
- }
- }
-
- elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
-
- htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
- + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
-
- if (htab->sfpr->_raw_size == 0)
- {
- if (!htab->have_undefweak)
- {
- _bfd_strip_section_from_output (info, htab->sfpr);
- return TRUE;
- }
-
- htab->sfpr->_raw_size = 4;
- }
-
- p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
- if (p == NULL)
- return FALSE;
- htab->sfpr->contents = p;
+ /* Provide any missing _save* and _rest* functions. */
+ htab->sfpr->size = 0;
+ for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
+ if (!sfpr_define (info, &funcs[i]))
+ return FALSE;
- for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
- {
- unsigned int fpr = i << 21;
- unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
- bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
- p += 4;
- }
- if (lowest_savef <= MAX_SAVE_FPR)
- {
- bfd_put_32 (htab->elf.dynobj, BLR, p);
- p += 4;
- }
+ elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
- for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
- {
- unsigned int fpr = i << 21;
- unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
- bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
- p += 4;
- }
- if (lowest_restf <= MAX_SAVE_FPR
- || htab->sfpr->_raw_size == 4)
- {
- bfd_put_32 (htab->elf.dynobj, BLR, p);
- }
+ if (htab->sfpr->size == 0)
+ htab->sfpr->flags |= SEC_EXCLUDE;
return TRUE;
}
understand. */
static bfd_boolean
-ppc64_elf_adjust_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
+ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
{
struct ppc_link_hash_table *htab;
asection *s;
- unsigned int power_of_two;
htab = ppc_hash_table (info);
/* Deal with function syms. */
if (h->type == STT_FUNC
- || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ || h->needs_plt)
{
/* Clear procedure linkage table information for any symbol that
won't need a .plt entry. */
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.refcount > 0)
break;
- if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
- || ent == NULL
+ if (ent == NULL
|| SYMBOL_CALLS_LOCAL (info, h)
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
&& h->root.type == bfd_link_hash_undefweak))
{
h->plt.plist = NULL;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ h->needs_plt = 0;
}
}
else
/* If this is a weak symbol, and there is a real definition, the
processor independent code will have arranged for us to see the
real definition first, and we can just use the same value. */
- if (h->weakdef != NULL)
+ if (h->u.weakdef != NULL)
{
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
- || h->weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->weakdef->root.u.def.section;
- h->root.u.def.value = h->weakdef->root.u.def.value;
+ BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
+ || h->u.weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->u.weakdef->root.u.def.section;
+ h->root.u.def.value = h->u.weakdef->root.u.def.value;
if (ELIMINATE_COPY_RELOCS)
- h->elf_link_hash_flags
- = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
- | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
+ h->non_got_ref = h->u.weakdef->non_got_ref;
return TRUE;
}
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
-
/* If we are creating a shared library, we must presume that the
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
/* If there are no references to this symbol that do not use the
GOT, we don't need to generate a copy reloc. */
- if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
+ if (!h->non_got_ref)
+ return TRUE;
+
+ /* Don't generate a copy reloc for symbols defined in the executable. */
+ if (!h->def_dynamic || !h->ref_regular || h->def_regular)
return TRUE;
if (ELIMINATE_COPY_RELOCS)
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
if (p == NULL)
{
- h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
+ h->non_got_ref = 0;
return TRUE;
}
}
+ if (h->plt.plist != NULL)
+ {
+ /* We should never get here, but unfortunately there are versions
+ of gcc out there that improperly (for this ABI) put initialized
+ function pointers, vtable refs and suchlike in read-only
+ sections. Allow them to proceed, but warn that this might
+ break at runtime. */
+ (*_bfd_error_handler)
+ (_("copy reloc against `%s' requires lazy plt linking; "
+ "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
+ h->root.root.string);
+ }
+
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. */
+
+ if (h->size == 0)
+ {
+ (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
+ h->root.root.string);
+ return TRUE;
+ }
+
/* We must allocate the symbol in our .dynbss section, which will
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
.rela.bss section we are going to use. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
- htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
- }
-
- /* We need to figure out the alignment required for this symbol. I
- have no idea how ELF linkers handle this. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 4)
- power_of_two = 4;
-
- /* Apply the required alignment. */
- s = htab->sdynbss;
- s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
- if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
- {
- if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
- return FALSE;
+ htab->relbss->size += sizeof (Elf64_External_Rela);
+ h->needs_copy = 1;
}
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->_raw_size;
+ s = htab->dynbss;
- /* Increment the section size to make room for the symbol. */
- s->_raw_size += h->size;
-
- return TRUE;
+ return _bfd_elf_adjust_dynamic_copy (h, s);
}
/* If given a function descriptor symbol, hide both the function code
sym and the descriptor. */
static void
-ppc64_elf_hide_symbol (info, h, force_local)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
- bfd_boolean force_local;
+ppc64_elf_hide_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ bfd_boolean force_local)
{
+ struct ppc_link_hash_entry *eh;
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
- if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh->is_func_descriptor)
{
- struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
+ struct ppc_link_hash_entry *fh = eh->oh;
if (fh == NULL)
{
when it runs out of memory. This function doesn't have a
return status, so there's no way to gracefully return an
error. So cheat. We know that string[-1] can be safely
- dereferenced; It's either a string in an ELF string
- table, or allocated in an objalloc structure. */
+ accessed; It's either a string in an ELF string table,
+ or allocated in an objalloc structure. */
- p = h->root.root.string - 1;
+ p = eh->elf.root.root.string - 1;
save = *p;
*(char *) p = '.';
htab = ppc_hash_table (info);
- fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
+ fh = (struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
*(char *) p = save;
/* Unfortunately, if it so happens that the string we were
reason the lookup should fail. */
if (fh == NULL)
{
- q = h->root.root.string + strlen (h->root.root.string);
- while (q >= h->root.root.string && *q == *p)
+ q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
+ while (q >= eh->elf.root.root.string && *q == *p)
--q, --p;
- if (q < h->root.root.string && *p == '.')
- fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
+ if (q < eh->elf.root.root.string && *p == '.')
+ fh = (struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
}
if (fh != NULL)
{
- ((struct ppc_link_hash_entry *) h)->oh = fh;
- ((struct ppc_link_hash_entry *) fh)->oh = h;
+ eh->oh = fh;
+ fh->oh = eh;
}
}
if (fh != NULL)
- _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
+ _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
}
}
static bfd_boolean
-get_sym_h (hp, symp, symsecp, tls_maskp, locsymsp, r_symndx, ibfd)
- struct elf_link_hash_entry **hp;
- Elf_Internal_Sym **symp;
- asection **symsecp;
- char **tls_maskp;
- Elf_Internal_Sym **locsymsp;
- unsigned long r_symndx;
- bfd *ibfd;
+get_sym_h (struct elf_link_hash_entry **hp,
+ Elf_Internal_Sym **symp,
+ asection **symsecp,
+ char **tls_maskp,
+ Elf_Internal_Sym **locsymsp,
+ unsigned long r_symndx,
+ bfd *ibfd)
{
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
if (r_symndx >= symtab_hdr->sh_info)
{
*symp = sym;
if (symsecp != NULL)
- {
- asection *symsec = NULL;
- if ((sym->st_shndx != SHN_UNDEF
- && sym->st_shndx < SHN_LORESERVE)
- || sym->st_shndx > SHN_HIRESERVE)
- symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
- *symsecp = symsec;
- }
+ *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
if (tls_maskp != NULL)
{
type suitable for optimization, and 1 otherwise. */
static int
-get_tls_mask (tls_maskp, locsymsp, rel, ibfd)
- char **tls_maskp;
- Elf_Internal_Sym **locsymsp;
- const Elf_Internal_Rela *rel;
- bfd *ibfd;
+get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
+ Elf_Internal_Sym **locsymsp,
+ const Elf_Internal_Rela *rel, bfd *ibfd)
{
unsigned long r_symndx;
- unsigned int next_r;
+ int next_r;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sec;
if ((*tls_maskp != NULL && **tls_maskp != 0)
|| sec == NULL
- || ppc64_elf_section_data (sec)->t_symndx == NULL)
+ || ppc64_elf_section_data (sec)->sec_type != sec_toc)
return 1;
/* Look inside a TOC section too. */
off = sym->st_value;
off += rel->r_addend;
BFD_ASSERT (off % 8 == 0);
- r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
- next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
+ r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
+ next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
return 0;
- if (h == NULL
- || h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
+ if (toc_symndx != NULL)
+ *toc_symndx = r_symndx;
+ if ((h == NULL
+ || ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && !h->def_dynamic))
+ && (next_r == -1 || next_r == -2))
+ return 1 - next_r;
+ return 1;
+}
+
+/* Adjust all global syms defined in opd sections. In gcc generated
+ code for the old ABI, these will already have been done. */
+
+static bfd_boolean
+adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
+{
+ struct ppc_link_hash_entry *eh;
+ asection *sym_sec;
+ struct _opd_sec_data *opd;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ return TRUE;
+
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh->adjust_done)
+ return TRUE;
+
+ sym_sec = eh->elf.root.u.def.section;
+ opd = get_opd_info (sym_sec);
+ if (opd != NULL && opd->adjust != NULL)
{
- if (next_r == (unsigned) -1)
- return 2;
- if (next_r == (unsigned) -2
- && (h == NULL
- || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
- return 3;
+ long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
+ if (adjust == -1)
+ {
+ /* This entry has been deleted. */
+ asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
+ if (dsec == NULL)
+ {
+ for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
+ if (elf_discarded_section (dsec))
+ {
+ ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
+ break;
+ }
+ }
+ eh->elf.root.u.def.value = 0;
+ eh->elf.root.u.def.section = dsec;
+ }
+ else
+ eh->elf.root.u.def.value += adjust;
+ eh->adjust_done = 1;
}
- return 1;
+ return TRUE;
}
+/* Handles decrementing dynamic reloc counts for the reloc specified by
+ R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
+ have already been determined. */
+
+static bfd_boolean
+dec_dynrel_count (bfd_vma r_info,
+ asection *sec,
+ struct bfd_link_info *info,
+ Elf_Internal_Sym **local_syms,
+ struct elf_link_hash_entry *h,
+ asection *sym_sec)
+{
+ enum elf_ppc64_reloc_type r_type;
+ struct ppc_dyn_relocs *p;
+ struct ppc_dyn_relocs **pp;
+
+ /* Can this reloc be dynamic? This switch, and later tests here
+ should be kept in sync with the code in check_relocs. */
+ r_type = ELF64_R_TYPE (r_info);
+ switch (r_type)
+ {
+ default:
+ return TRUE;
+
+ case R_PPC64_TPREL16:
+ case R_PPC64_TPREL16_LO:
+ case R_PPC64_TPREL16_HI:
+ case R_PPC64_TPREL16_HA:
+ case R_PPC64_TPREL16_DS:
+ case R_PPC64_TPREL16_LO_DS:
+ case R_PPC64_TPREL16_HIGHER:
+ case R_PPC64_TPREL16_HIGHERA:
+ case R_PPC64_TPREL16_HIGHEST:
+ case R_PPC64_TPREL16_HIGHESTA:
+ if (!info->shared)
+ return TRUE;
+
+ case R_PPC64_TPREL64:
+ case R_PPC64_DTPMOD64:
+ case R_PPC64_DTPREL64:
+ case R_PPC64_ADDR64:
+ case R_PPC64_REL30:
+ case R_PPC64_REL32:
+ case R_PPC64_REL64:
+ case R_PPC64_ADDR14:
+ case R_PPC64_ADDR14_BRNTAKEN:
+ case R_PPC64_ADDR14_BRTAKEN:
+ case R_PPC64_ADDR16:
+ case R_PPC64_ADDR16_DS:
+ case R_PPC64_ADDR16_HA:
+ case R_PPC64_ADDR16_HI:
+ case R_PPC64_ADDR16_HIGHER:
+ case R_PPC64_ADDR16_HIGHERA:
+ case R_PPC64_ADDR16_HIGHEST:
+ case R_PPC64_ADDR16_HIGHESTA:
+ case R_PPC64_ADDR16_LO:
+ case R_PPC64_ADDR16_LO_DS:
+ case R_PPC64_ADDR24:
+ case R_PPC64_ADDR32:
+ case R_PPC64_UADDR16:
+ case R_PPC64_UADDR32:
+ case R_PPC64_UADDR64:
+ case R_PPC64_TOC:
+ break;
+ }
+
+ if (local_syms != NULL)
+ {
+ unsigned long r_symndx;
+ Elf_Internal_Sym *sym;
+ bfd *ibfd = sec->owner;
+
+ r_symndx = ELF64_R_SYM (r_info);
+ if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
+ return FALSE;
+ }
+
+ if ((info->shared
+ && (must_be_dyn_reloc (info, r_type)
+ || (h != NULL
+ && (!info->symbolic
+ || h->root.type == bfd_link_hash_defweak
+ || !h->def_regular))))
+ || (ELIMINATE_COPY_RELOCS
+ && !info->shared
+ && h != NULL
+ && (h->root.type == bfd_link_hash_defweak
+ || !h->def_regular)))
+ ;
+ else
+ return TRUE;
+
+ if (h != NULL)
+ pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
+ else
+ {
+ if (sym_sec != NULL)
+ {
+ void *vpp = &elf_section_data (sym_sec)->local_dynrel;
+ pp = (struct ppc_dyn_relocs **) vpp;
+ }
+ else
+ {
+ void *vpp = &elf_section_data (sec)->local_dynrel;
+ pp = (struct ppc_dyn_relocs **) vpp;
+ }
+
+ /* elf_gc_sweep may have already removed all dyn relocs associated
+ with local syms for a given section. Don't report a dynreloc
+ miscount. */
+ if (*pp == NULL)
+ return TRUE;
+ }
+
+ while ((p = *pp) != NULL)
+ {
+ if (p->sec == sec)
+ {
+ if (!must_be_dyn_reloc (info, r_type))
+ p->pc_count -= 1;
+ p->count -= 1;
+ if (p->count == 0)
+ *pp = p->next;
+ return TRUE;
+ }
+ pp = &p->next;
+ }
+
+ (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
+ sec->owner, sec);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+}
+
+/* Remove unused Official Procedure Descriptor entries. Currently we
+ only remove those associated with functions in discarded link-once
+ sections, or weakly defined functions that have been overridden. It
+ would be possible to remove many more entries for statically linked
+ applications. */
+
bfd_boolean
-ppc64_elf_edit_opd (obfd, info)
- bfd *obfd;
- struct bfd_link_info *info;
+ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
+ bfd_boolean non_overlapping)
{
bfd *ibfd;
+ bfd_boolean some_edited = FALSE;
+ asection *need_pad = NULL;
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
Elf_Internal_Sym *local_syms;
struct elf_link_hash_entry **sym_hashes;
bfd_vma offset;
- bfd_size_type amt;
- long *adjust;
- bfd_boolean need_edit;
+ struct _opd_sec_data *opd;
+ bfd_boolean need_edit, add_aux_fields;
+ bfd_size_type cnt_16b = 0;
sec = bfd_get_section_by_name (ibfd, ".opd");
- if (sec == NULL)
+ if (sec == NULL || sec->size == 0)
continue;
- amt = sec->_raw_size * sizeof (long) / 24;
- adjust = ppc64_elf_section_data (sec)->opd.adjust;
- if (adjust == NULL)
- {
- /* Must be a ld -r link. ie. check_relocs hasn't been
- called. */
- adjust = (long *) bfd_zalloc (obfd, amt);
- ppc64_elf_section_data (sec)->opd.adjust = adjust;
- }
- memset (adjust, 0, (size_t) amt);
+ if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
+ continue;
if (sec->output_section == bfd_abs_section_ptr)
continue;
continue;
local_syms = NULL;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (ibfd);
sym_hashes = elf_sym_hashes (ibfd);
/* Read the relocations. */
- relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
+ relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
info->keep_memory);
if (relstart == NULL)
return FALSE;
/* First run through the relocs to check they are sane, and to
determine whether we need to edit this opd section. */
need_edit = FALSE;
+ need_pad = sec;
offset = 0;
relend = relstart + sec->reloc_count;
- for (rel = relstart; rel < relend; rel++)
+ for (rel = relstart; rel < relend; )
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
- /* .opd contains a regular array of 24 byte entries. We're
+ /* .opd contains a regular array of 16 or 24 byte entries. We're
only interested in the reloc pointing to a function entry
point. */
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
- if (r_type == R_PPC64_TOC)
- continue;
-
- if (r_type != R_PPC64_ADDR64)
- {
- (*_bfd_error_handler)
- (_("%s: unexpected reloc type %u in .opd section"),
- bfd_archive_filename (ibfd), r_type);
- need_edit = FALSE;
- break;
- }
-
- if (rel + 1 >= relend)
- continue;
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
- if (r_type != R_PPC64_TOC)
- continue;
-
- if (rel->r_offset != offset)
+ if (rel->r_offset != offset
+ || rel + 1 >= relend
+ || (rel + 1)->r_offset != offset + 8)
{
/* If someone messes with .opd alignment then after a
"ld -r" we might have padding in the middle of .opd.
Also, there's nothing to prevent someone putting
something silly in .opd with the assembler. No .opd
optimization for them! */
+ broken_opd:
+ (*_bfd_error_handler)
+ (_("%B: .opd is not a regular array of opd entries"), ibfd);
+ need_edit = FALSE;
+ break;
+ }
+
+ if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
+ || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
+ {
(*_bfd_error_handler)
- (_("%s: .opd is not a regular array of opd entries"),
- bfd_archive_filename (ibfd));
+ (_("%B: unexpected reloc type %u in .opd section"),
+ ibfd, r_type);
need_edit = FALSE;
break;
}
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
- goto error_free_rel;
+ goto error_ret;
if (sym_sec == NULL || sym_sec->owner == NULL)
{
if (h != NULL)
sym_name = h->root.root.string;
else
- sym_name = bfd_elf_local_sym_name (ibfd, sym);
+ sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
+ sym_sec);
(*_bfd_error_handler)
- (_("%s: undefined sym `%s' in .opd section"),
- bfd_archive_filename (ibfd),
- sym_name);
+ (_("%B: undefined sym `%s' in .opd section"),
+ ibfd, sym_name);
need_edit = FALSE;
break;
}
|| sym_sec->output_section == bfd_abs_section_ptr)
need_edit = TRUE;
- offset += 24;
+ rel += 2;
+ if (rel == relend
+ || (rel + 1 == relend && rel->r_offset == offset + 16))
+ {
+ if (sec->size == offset + 24)
+ {
+ need_pad = NULL;
+ break;
+ }
+ if (rel == relend && sec->size == offset + 16)
+ {
+ cnt_16b++;
+ break;
+ }
+ goto broken_opd;
+ }
+
+ if (rel->r_offset == offset + 24)
+ offset += 24;
+ else if (rel->r_offset != offset + 16)
+ goto broken_opd;
+ else if (rel + 1 < relend
+ && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
+ && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
+ {
+ offset += 16;
+ cnt_16b++;
+ }
+ else if (rel + 2 < relend
+ && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
+ && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
+ {
+ offset += 24;
+ rel += 1;
+ }
+ else
+ goto broken_opd;
}
- if (need_edit)
+ add_aux_fields = non_overlapping && cnt_16b > 0;
+
+ if (need_edit || add_aux_fields)
{
Elf_Internal_Rela *write_rel;
bfd_byte *rptr, *wptr;
+ bfd_byte *new_contents = NULL;
bfd_boolean skip;
+ long opd_ent_size;
+ bfd_size_type amt;
+
+ amt = sec->size * sizeof (long) / 8;
+ opd = &ppc64_elf_section_data (sec)->u.opd;
+ opd->adjust = bfd_zalloc (obfd, amt);
+ if (opd->adjust == NULL)
+ return FALSE;
+ ppc64_elf_section_data (sec)->sec_type = sec_opd;
/* This seems a waste of time as input .opd sections are all
zeros as generated by gcc, but I suppose there's no reason
the third word of .opd entries. */
if ((sec->flags & SEC_IN_MEMORY) == 0)
{
- bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
- if (loc == NULL
- || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
- sec->_raw_size))
+ bfd_byte *loc;
+ if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
{
+ if (loc != NULL)
+ free (loc);
+ error_ret:
if (local_syms != NULL
&& symtab_hdr->contents != (unsigned char *) local_syms)
free (local_syms);
- error_free_rel:
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
return FALSE;
elf_section_data (sec)->relocs = relstart;
- wptr = sec->contents;
+ new_contents = sec->contents;
+ if (add_aux_fields)
+ {
+ new_contents = bfd_malloc (sec->size + cnt_16b * 8);
+ if (new_contents == NULL)
+ return FALSE;
+ need_pad = FALSE;
+ }
+ wptr = new_contents;
rptr = sec->contents;
+
write_rel = relstart;
skip = FALSE;
offset = 0;
+ opd_ent_size = 0;
for (rel = relstart; rel < relend; rel++)
{
+ unsigned long r_symndx;
+ asection *sym_sec;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
+ r_symndx, ibfd))
+ goto error_ret;
+
if (rel->r_offset == offset)
{
- unsigned long r_symndx;
- asection *sym_sec;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
-
- r_symndx = ELF64_R_SYM (rel->r_info);
- get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
- r_symndx, ibfd);
+ struct ppc_link_hash_entry *fdh = NULL;
+
+ /* See if the .opd entry is full 24 byte or
+ 16 byte (with fd_aux entry overlapped with next
+ fd_func). */
+ opd_ent_size = 24;
+ if ((rel + 2 == relend && sec->size == offset + 16)
+ || (rel + 3 < relend
+ && rel[2].r_offset == offset + 16
+ && rel[3].r_offset == offset + 24
+ && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
+ && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
+ opd_ent_size = 16;
+
+ if (h != NULL
+ && h->root.root.string[0] == '.')
+ {
+ fdh = get_fdh ((struct ppc_link_hash_entry *) h,
+ ppc_hash_table (info));
+ if (fdh != NULL
+ && fdh->elf.root.type != bfd_link_hash_defined
+ && fdh->elf.root.type != bfd_link_hash_defweak)
+ fdh = NULL;
+ }
skip = (sym_sec->owner != ibfd
|| sym_sec->output_section == bfd_abs_section_ptr);
if (skip)
{
- if (h != NULL && sym_sec->owner == ibfd)
+ if (fdh != NULL && sym_sec->owner == ibfd)
{
/* Arrange for the function descriptor sym
to be dropped. */
- struct ppc_link_hash_entry *fdh;
- struct ppc_link_hash_entry *fh;
-
- fh = (struct ppc_link_hash_entry *) h;
- fdh = (struct ppc_link_hash_entry *) fh->oh;
- if (fdh == NULL)
- {
- const char *fd_name;
- struct ppc_link_hash_table *htab;
-
- fd_name = h->root.root.string + 1;
- htab = ppc_hash_table (info);
- fdh = (struct ppc_link_hash_entry *)
- elf_link_hash_lookup (&htab->elf, fd_name,
- FALSE, FALSE, FALSE);
- fdh->is_func_descriptor = 1;
- fdh->oh = &fh->elf;
- fh->is_func = 1;
- fh->oh = &fdh->elf;
- }
-
fdh->elf.root.u.def.value = 0;
fdh->elf.root.u.def.section = sym_sec;
}
+ opd->adjust[rel->r_offset / 8] = -1;
}
else
{
/* We'll be keeping this opd entry. */
- if (h != NULL)
- {
- /* Redefine the function descriptor symbol
- to this location in the opd section.
- We've checked above that opd relocs are
- ordered. */
- struct ppc_link_hash_entry *fdh;
- struct ppc_link_hash_entry *fh;
-
- fh = (struct ppc_link_hash_entry *) h;
- fdh = (struct ppc_link_hash_entry *) fh->oh;
- if (fdh == NULL)
- {
- const char *fd_name;
- struct ppc_link_hash_table *htab;
-
- fd_name = h->root.root.string + 1;
- htab = ppc_hash_table (info);
- fdh = (struct ppc_link_hash_entry *)
- elf_link_hash_lookup (&htab->elf, fd_name,
- FALSE, FALSE, FALSE);
- fdh->is_func_descriptor = 1;
- fdh->oh = &fh->elf;
- fh->is_func = 1;
- fh->oh = &fdh->elf;
- }
-
- fdh->elf.root.u.def.value = wptr - sec->contents;
- }
- else
+ if (fdh != NULL)
{
- /* Local syms are a bit tricky. We could
- tweak them as they can be cached, but
- we'd need to look through the local syms
- for the function descriptor sym which we
- don't have at the moment. So keep an
- array of adjustments. */
- adjust[rel->r_offset / 24] = wptr - rptr;
+ /* Redefine the function descriptor symbol to
+ this location in the opd section. It is
+ necessary to update the value here rather
+ than using an array of adjustments as we do
+ for local symbols, because various places
+ in the generic ELF code use the value
+ stored in u.def.value. */
+ fdh->elf.root.u.def.value = wptr - new_contents;
+ fdh->adjust_done = 1;
}
+ /* Local syms are a bit tricky. We could
+ tweak them as they can be cached, but
+ we'd need to look through the local syms
+ for the function descriptor sym which we
+ don't have at the moment. So keep an
+ array of adjustments. */
+ opd->adjust[rel->r_offset / 8]
+ = (wptr - new_contents) - (rptr - sec->contents);
+
if (wptr != rptr)
- memcpy (wptr, rptr, 24);
- wptr += 24;
+ memcpy (wptr, rptr, opd_ent_size);
+ wptr += opd_ent_size;
+ if (add_aux_fields && opd_ent_size == 16)
+ {
+ memset (wptr, '\0', 8);
+ wptr += 8;
+ }
}
- rptr += 24;
- offset += 24;
+ rptr += opd_ent_size;
+ offset += opd_ent_size;
}
- /* We need to adjust any reloc offsets to point to the
- new opd entries. While we're at it, we may as well
- remove redundant relocs. */
- if (!skip)
+ if (skip)
+ {
+ if (!NO_OPD_RELOCS
+ && !info->relocatable
+ && !dec_dynrel_count (rel->r_info, sec, info,
+ NULL, h, sym_sec))
+ goto error_ret;
+ }
+ else
{
- rel->r_offset += wptr - rptr;
+ /* We need to adjust any reloc offsets to point to the
+ new opd entries. While we're at it, we may as well
+ remove redundant relocs. */
+ rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
if (write_rel != rel)
memcpy (write_rel, rel, sizeof (*rel));
++write_rel;
}
}
- sec->_cooked_size = wptr - sec->contents;
+ sec->size = wptr - new_contents;
sec->reloc_count = write_rel - relstart;
- /* Fudge the size too, as this is used later in
+ if (add_aux_fields)
+ {
+ free (sec->contents);
+ sec->contents = new_contents;
+ }
+
+ /* Fudge the header size too, as this is used later in
elf_bfd_final_link if we are emitting relocs. */
elf_section_data (sec)->rel_hdr.sh_size
= sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
+ some_edited = TRUE;
}
else if (elf_section_data (sec)->relocs != relstart)
free (relstart);
- if (local_syms != NULL
- && symtab_hdr->contents != (unsigned char *) local_syms)
+ if (local_syms != NULL
+ && symtab_hdr->contents != (unsigned char *) local_syms)
+ {
+ if (!info->keep_memory)
+ free (local_syms);
+ else
+ symtab_hdr->contents = (unsigned char *) local_syms;
+ }
+ }
+
+ if (some_edited)
+ elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
+
+ /* If we are doing a final link and the last .opd entry is just 16 byte
+ long, add a 8 byte padding after it. */
+ if (need_pad != NULL && !info->relocatable)
+ {
+ bfd_byte *p;
+
+ if ((need_pad->flags & SEC_IN_MEMORY) == 0)
+ {
+ BFD_ASSERT (need_pad->size > 0);
+
+ p = bfd_malloc (need_pad->size + 8);
+ if (p == NULL)
+ return FALSE;
+
+ if (! bfd_get_section_contents (need_pad->owner, need_pad,
+ p, 0, need_pad->size))
+ return FALSE;
+
+ need_pad->contents = p;
+ need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
+ }
+ else
+ {
+ p = bfd_realloc (need_pad->contents, need_pad->size + 8);
+ if (p == NULL)
+ return FALSE;
+
+ need_pad->contents = p;
+ }
+
+ memset (need_pad->contents + need_pad->size, 0, 8);
+ need_pad->size += 8;
+ }
+
+ return TRUE;
+}
+
+/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
+
+asection *
+ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
+{
+ struct ppc_link_hash_table *htab;
+
+ htab = ppc_hash_table (info);
+ if (htab->tls_get_addr != NULL)
+ {
+ struct ppc_link_hash_entry *h = htab->tls_get_addr;
+
+ while (h->elf.root.type == bfd_link_hash_indirect
+ || h->elf.root.type == bfd_link_hash_warning)
+ h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
+
+ htab->tls_get_addr = h;
+
+ if (htab->tls_get_addr_fd == NULL
+ && h->oh != NULL
+ && h->oh->is_func_descriptor
+ && (h->oh->elf.root.type == bfd_link_hash_defined
+ || h->oh->elf.root.type == bfd_link_hash_defweak))
+ htab->tls_get_addr_fd = h->oh;
+ }
+
+ if (htab->tls_get_addr_fd != NULL)
+ {
+ struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
+
+ while (h->elf.root.type == bfd_link_hash_indirect
+ || h->elf.root.type == bfd_link_hash_warning)
+ h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
+
+ htab->tls_get_addr_fd = h;
+ }
+
+ return _bfd_elf_tls_setup (obfd, info);
+}
+
+/* Run through all the TLS relocs looking for optimization
+ opportunities. The linker has been hacked (see ppc64elf.em) to do
+ a preliminary section layout so that we know the TLS segment
+ offsets. We can't optimize earlier because some optimizations need
+ to know the tp offset, and we need to optimize before allocating
+ dynamic relocations. */
+
+bfd_boolean
+ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
+{
+ bfd *ibfd;
+ asection *sec;
+ struct ppc_link_hash_table *htab;
+ int pass;
+
+ if (info->relocatable || !info->executable)
+ return TRUE;
+
+ htab = ppc_hash_table (info);
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ Elf_Internal_Sym *locsyms = NULL;
+ asection *toc = bfd_get_section_by_name (ibfd, ".toc");
+ unsigned char *toc_ref = NULL;
+
+ /* Look at all the sections for this file. Make two passes over
+ the relocs. On the first pass, mark toc entries involved
+ with tls relocs, and check that tls relocs involved in
+ setting up a tls_get_addr call are indeed followed by such a
+ call. If they are not, exclude them from the optimizations
+ done on the second pass. */
+ for (pass = 0; pass < 2; ++pass)
+ for (sec = ibfd->sections; sec != NULL; sec = sec->next)
+ if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
+ {
+ Elf_Internal_Rela *relstart, *rel, *relend;
+
+ /* Read the relocations. */
+ relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
+ info->keep_memory);
+ if (relstart == NULL)
+ return FALSE;
+
+ relend = relstart + sec->reloc_count;
+ for (rel = relstart; rel < relend; rel++)
+ {
+ enum elf_ppc64_reloc_type r_type;
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+ asection *sym_sec;
+ char *tls_mask;
+ char tls_set, tls_clear, tls_type = 0;
+ bfd_vma value;
+ bfd_boolean ok_tprel, is_local;
+ long toc_ref_index = 0;
+ int expecting_tls_get_addr = 0;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
+ r_symndx, ibfd))
+ {
+ err_free_rel:
+ if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ if (toc_ref != NULL)
+ free (toc_ref);
+ if (locsyms != NULL
+ && (elf_symtab_hdr (ibfd).contents
+ != (unsigned char *) locsyms))
+ free (locsyms);
+ return FALSE;
+ }
+
+ if (h != NULL)
+ {
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ continue;
+ value = h->root.u.def.value;
+ }
+ else
+ /* Symbols referenced by TLS relocs must be of type
+ STT_TLS. So no need for .opd local sym adjust. */
+ value = sym->st_value;
+
+ ok_tprel = FALSE;
+ is_local = FALSE;
+ if (h == NULL
+ || !h->def_dynamic)
+ {
+ is_local = TRUE;
+ value += sym_sec->output_offset;
+ value += sym_sec->output_section->vma;
+ value -= htab->elf.tls_sec->vma;
+ ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
+ < (bfd_vma) 1 << 32);
+ }
+
+ r_type = ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ case R_PPC64_GOT_TLSLD16:
+ case R_PPC64_GOT_TLSLD16_LO:
+ expecting_tls_get_addr = 1;
+ /* Fall thru */
+
+ case R_PPC64_GOT_TLSLD16_HI:
+ case R_PPC64_GOT_TLSLD16_HA:
+ /* These relocs should never be against a symbol
+ defined in a shared lib. Leave them alone if
+ that turns out to be the case. */
+ if (!is_local)
+ continue;
+
+ /* LD -> LE */
+ tls_set = 0;
+ tls_clear = TLS_LD;
+ tls_type = TLS_TLS | TLS_LD;
+ break;
+
+ case R_PPC64_GOT_TLSGD16:
+ case R_PPC64_GOT_TLSGD16_LO:
+ expecting_tls_get_addr = 1;
+ /* Fall thru */
+
+ case R_PPC64_GOT_TLSGD16_HI:
+ case R_PPC64_GOT_TLSGD16_HA:
+ if (ok_tprel)
+ /* GD -> LE */
+ tls_set = 0;
+ else
+ /* GD -> IE */
+ tls_set = TLS_TLS | TLS_TPRELGD;
+ tls_clear = TLS_GD;
+ tls_type = TLS_TLS | TLS_GD;
+ break;
+
+ case R_PPC64_GOT_TPREL16_DS:
+ case R_PPC64_GOT_TPREL16_LO_DS:
+ case R_PPC64_GOT_TPREL16_HI:
+ case R_PPC64_GOT_TPREL16_HA:
+ if (ok_tprel)
+ {
+ /* IE -> LE */
+ tls_set = 0;
+ tls_clear = TLS_TPREL;
+ tls_type = TLS_TLS | TLS_TPREL;
+ break;
+ }
+ continue;
+
+ case R_PPC64_TOC16:
+ case R_PPC64_TOC16_LO:
+ case R_PPC64_TLS:
+ if (sym_sec == NULL || sym_sec != toc)
+ continue;
+
+ /* Mark this toc entry as referenced by a TLS
+ code sequence. We can do that now in the
+ case of R_PPC64_TLS, and after checking for
+ tls_get_addr for the TOC16 relocs. */
+ if (toc_ref == NULL)
+ {
+ toc_ref = bfd_zmalloc (toc->size / 8);
+ if (toc_ref == NULL)
+ goto err_free_rel;
+ }
+ if (h != NULL)
+ value = h->root.u.def.value;
+ else
+ value = sym->st_value;
+ value += rel->r_addend;
+ BFD_ASSERT (value < toc->size && value % 8 == 0);
+ toc_ref_index = value / 8;
+ if (r_type == R_PPC64_TLS)
+ {
+ toc_ref[toc_ref_index] = 1;
+ continue;
+ }
+
+ if (pass != 0 && toc_ref[toc_ref_index] == 0)
+ continue;
+
+ tls_set = 0;
+ tls_clear = 0;
+ expecting_tls_get_addr = 2;
+ break;
+
+ case R_PPC64_TPREL64:
+ if (pass == 0
+ || sec != toc
+ || toc_ref == NULL
+ || !toc_ref[rel->r_offset / 8])
+ continue;
+ if (ok_tprel)
+ {
+ /* IE -> LE */
+ tls_set = TLS_EXPLICIT;
+ tls_clear = TLS_TPREL;
+ break;
+ }
+ continue;
+
+ case R_PPC64_DTPMOD64:
+ if (pass == 0
+ || sec != toc
+ || toc_ref == NULL
+ || !toc_ref[rel->r_offset / 8])
+ continue;
+ if (rel + 1 < relend
+ && (rel[1].r_info
+ == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
+ && rel[1].r_offset == rel->r_offset + 8)
+ {
+ if (ok_tprel)
+ /* GD -> LE */
+ tls_set = TLS_EXPLICIT | TLS_GD;
+ else
+ /* GD -> IE */
+ tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
+ tls_clear = TLS_GD;
+ }
+ else
+ {
+ if (!is_local)
+ continue;
+
+ /* LD -> LE */
+ tls_set = TLS_EXPLICIT;
+ tls_clear = TLS_LD;
+ }
+ break;
+
+ default:
+ continue;
+ }
+
+ if (pass == 0)
+ {
+ if (!expecting_tls_get_addr)
+ continue;
+
+ if (rel + 1 < relend)
+ {
+ Elf_Internal_Shdr *symtab_hdr;
+ enum elf_ppc64_reloc_type r_type2;
+ unsigned long r_symndx2;
+ struct elf_link_hash_entry *h2;
+
+ symtab_hdr = &elf_symtab_hdr (ibfd);
+
+ /* The next instruction should be a call to
+ __tls_get_addr. Peek at the reloc to be sure. */
+ r_type2 = ELF64_R_TYPE (rel[1].r_info);
+ r_symndx2 = ELF64_R_SYM (rel[1].r_info);
+ if (r_symndx2 >= symtab_hdr->sh_info
+ && (r_type2 == R_PPC64_REL14
+ || r_type2 == R_PPC64_REL14_BRTAKEN
+ || r_type2 == R_PPC64_REL14_BRNTAKEN
+ || r_type2 == R_PPC64_REL24))
+ {
+ struct elf_link_hash_entry **sym_hashes;
+
+ sym_hashes = elf_sym_hashes (ibfd);
+
+ h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
+ while (h2->root.type == bfd_link_hash_indirect
+ || h2->root.type == bfd_link_hash_warning)
+ h2 = ((struct elf_link_hash_entry *)
+ h2->root.u.i.link);
+ if (h2 != NULL
+ && (h2 == &htab->tls_get_addr->elf
+ || h2 == &htab->tls_get_addr_fd->elf))
+ {
+ if (expecting_tls_get_addr == 2)
+ {
+ /* Check for toc tls entries. */
+ char *toc_tls;
+ int retval;
+
+ retval = get_tls_mask (&toc_tls, NULL,
+ &locsyms,
+ rel, ibfd);
+ if (retval == 0)
+ goto err_free_rel;
+ if (retval > 1 && toc_tls != NULL)
+ toc_ref[toc_ref_index] = 1;
+ }
+ continue;
+ }
+ }
+ }
+
+ if (expecting_tls_get_addr != 1)
+ continue;
+
+ /* Uh oh, we didn't find the expected call. We
+ could just mark this symbol to exclude it
+ from tls optimization but it's safer to skip
+ the entire section. */
+ sec->has_tls_reloc = 0;
+ break;
+ }
+
+ if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
+ {
+ struct plt_entry *ent;
+ for (ent = htab->tls_get_addr->elf.plt.plist;
+ ent != NULL;
+ ent = ent->next)
+ if (ent->addend == 0)
+ {
+ if (ent->plt.refcount > 0)
+ {
+ ent->plt.refcount -= 1;
+ expecting_tls_get_addr = 0;
+ }
+ break;
+ }
+ }
+
+ if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
+ {
+ struct plt_entry *ent;
+ for (ent = htab->tls_get_addr_fd->elf.plt.plist;
+ ent != NULL;
+ ent = ent->next)
+ if (ent->addend == 0)
+ {
+ if (ent->plt.refcount > 0)
+ ent->plt.refcount -= 1;
+ break;
+ }
+ }
+
+ if (tls_clear == 0)
+ continue;
+
+ if ((tls_set & TLS_EXPLICIT) == 0)
+ {
+ struct got_entry *ent;
+
+ /* Adjust got entry for this reloc. */
+ if (h != NULL)
+ ent = h->got.glist;
+ else
+ ent = elf_local_got_ents (ibfd)[r_symndx];
+
+ for (; ent != NULL; ent = ent->next)
+ if (ent->addend == rel->r_addend
+ && ent->owner == ibfd
+ && ent->tls_type == tls_type)
+ break;
+ if (ent == NULL)
+ abort ();
+
+ if (tls_set == 0)
+ {
+ /* We managed to get rid of a got entry. */
+ if (ent->got.refcount > 0)
+ ent->got.refcount -= 1;
+ }
+ }
+ else
+ {
+ /* If we got rid of a DTPMOD/DTPREL reloc pair then
+ we'll lose one or two dyn relocs. */
+ if (!dec_dynrel_count (rel->r_info, sec, info,
+ NULL, h, sym_sec))
+ return FALSE;
+
+ if (tls_set == (TLS_EXPLICIT | TLS_GD))
+ {
+ if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
+ NULL, h, sym_sec))
+ return FALSE;
+ }
+ }
+
+ *tls_mask |= tls_set;
+ *tls_mask &= ~tls_clear;
+ }
+
+ if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ }
+
+ if (toc_ref != NULL)
+ free (toc_ref);
+
+ if (locsyms != NULL
+ && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
+ {
+ if (!info->keep_memory)
+ free (locsyms);
+ else
+ elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
+ }
+ }
+ return TRUE;
+}
+
+/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
+ the values of any global symbols in a toc section that has been
+ edited. Globals in toc sections should be a rarity, so this function
+ sets a flag if any are found in toc sections other than the one just
+ edited, so that futher hash table traversals can be avoided. */
+
+struct adjust_toc_info
+{
+ asection *toc;
+ unsigned long *skip;
+ bfd_boolean global_toc_syms;
+};
+
+static bfd_boolean
+adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
+{
+ struct ppc_link_hash_entry *eh;
+ struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ return TRUE;
+
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh->adjust_done)
+ return TRUE;
+
+ if (eh->elf.root.u.def.section == toc_inf->toc)
+ {
+ unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
+ if (skip != (unsigned long) -1)
+ eh->elf.root.u.def.value -= skip;
+ else
{
- if (!info->keep_memory)
- free (local_syms);
- else
- symtab_hdr->contents = (unsigned char *) local_syms;
+ (*_bfd_error_handler)
+ (_("%s defined in removed toc entry"), eh->elf.root.root.string);
+ eh->elf.root.u.def.section = &bfd_abs_section;
+ eh->elf.root.u.def.value = 0;
}
+ eh->adjust_done = 1;
}
+ else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
+ toc_inf->global_toc_syms = TRUE;
return TRUE;
}
-/* Set htab->tls_sec. */
+/* Examine all relocs referencing .toc sections in order to remove
+ unused .toc entries. */
bfd_boolean
-ppc64_elf_tls_setup (obfd, info)
- bfd *obfd;
- struct bfd_link_info *info;
+ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
{
- asection *tls;
- struct ppc_link_hash_table *htab;
+ bfd *ibfd;
+ struct adjust_toc_info toc_inf;
- for (tls = obfd->sections; tls != NULL; tls = tls->next)
- if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
- == (SEC_THREAD_LOCAL | SEC_LOAD))
- break;
+ toc_inf.global_toc_syms = TRUE;
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ asection *toc, *sec;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *local_syms;
+ struct elf_link_hash_entry **sym_hashes;
+ Elf_Internal_Rela *relstart, *rel;
+ unsigned long *skip, *drop;
+ unsigned char *used;
+ unsigned char *keep, last, some_unused;
+
+ toc = bfd_get_section_by_name (ibfd, ".toc");
+ if (toc == NULL
+ || toc->size == 0
+ || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
+ || elf_discarded_section (toc))
+ continue;
- htab = ppc_hash_table (info);
- htab->tls_sec = tls;
+ local_syms = NULL;
+ symtab_hdr = &elf_symtab_hdr (ibfd);
+ sym_hashes = elf_sym_hashes (ibfd);
- if (htab->tls_get_addr != NULL)
- {
- struct elf_link_hash_entry *h = htab->tls_get_addr;
+ /* Look at sections dropped from the final link. */
+ skip = NULL;
+ relstart = NULL;
+ for (sec = ibfd->sections; sec != NULL; sec = sec->next)
+ {
+ if (sec->reloc_count == 0
+ || !elf_discarded_section (sec)
+ || get_opd_info (sec)
+ || (sec->flags & SEC_ALLOC) == 0
+ || (sec->flags & SEC_DEBUGGING) != 0)
+ continue;
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
+ if (relstart == NULL)
+ goto error_ret;
- htab->tls_get_addr = h;
- }
+ /* Run through the relocs to see which toc entries might be
+ unused. */
+ for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
+ {
+ enum elf_ppc64_reloc_type r_type;
+ unsigned long r_symndx;
+ asection *sym_sec;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+ bfd_vma val;
+
+ r_type = ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ default:
+ continue;
- return tls != NULL;
-}
+ case R_PPC64_TOC16:
+ case R_PPC64_TOC16_LO:
+ case R_PPC64_TOC16_HI:
+ case R_PPC64_TOC16_HA:
+ case R_PPC64_TOC16_DS:
+ case R_PPC64_TOC16_LO_DS:
+ break;
+ }
-/* Run through all the TLS relocs looking for optimization
- opportunities. The linker has been hacked (see ppc64elf.em) to do
- a preliminary section layout so that we know the TLS segment
- offsets. We can't optimize earlier because some optimizations need
- to know the tp offset, and we need to optimize before allocating
- dynamic relocations. */
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
+ r_symndx, ibfd))
+ goto error_ret;
-bfd_boolean
-ppc64_elf_tls_optimize (obfd, info)
- bfd *obfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
-{
- bfd *ibfd;
- asection *sec;
- struct ppc_link_hash_table *htab;
+ if (sym_sec != toc)
+ continue;
- if (info->relocateable || info->shared)
- return TRUE;
+ if (h != NULL)
+ val = h->root.u.def.value;
+ else
+ val = sym->st_value;
+ val += rel->r_addend;
- htab = ppc_hash_table (info);
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
- {
- Elf_Internal_Sym *locsyms = NULL;
+ if (val >= toc->size)
+ continue;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
- {
- Elf_Internal_Rela *relstart, *rel, *relend;
- int expecting_tls_get_addr;
-
- /* Read the relocations. */
- relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->keep_memory);
- if (relstart == NULL)
- return FALSE;
+ /* Anything in the toc ought to be aligned to 8 bytes.
+ If not, don't mark as unused. */
+ if (val & 7)
+ continue;
+
+ if (skip == NULL)
+ {
+ skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
+ if (skip == NULL)
+ goto error_ret;
+ }
+
+ skip[val >> 3] = 1;
+ }
+
+ if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ }
+
+ if (skip == NULL)
+ continue;
+
+ used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
+ if (used == NULL)
+ {
+ error_ret:
+ if (local_syms != NULL
+ && symtab_hdr->contents != (unsigned char *) local_syms)
+ free (local_syms);
+ if (sec != NULL
+ && relstart != NULL
+ && elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ if (skip != NULL)
+ free (skip);
+ return FALSE;
+ }
+
+ /* Now check all kept sections that might reference the toc.
+ Check the toc itself last. */
+ for (sec = (ibfd->sections == toc && toc->next ? toc->next
+ : ibfd->sections);
+ sec != NULL;
+ sec = (sec == toc ? NULL
+ : sec->next == NULL ? toc
+ : sec->next == toc && toc->next ? toc->next
+ : sec->next))
+ {
+ int repeat;
+
+ if (sec->reloc_count == 0
+ || elf_discarded_section (sec)
+ || get_opd_info (sec)
+ || (sec->flags & SEC_ALLOC) == 0
+ || (sec->flags & SEC_DEBUGGING) != 0)
+ continue;
- expecting_tls_get_addr = 0;
- relend = relstart + sec->reloc_count;
- for (rel = relstart; rel < relend; rel++)
+ relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
+ if (relstart == NULL)
+ goto error_ret;
+
+ /* Mark toc entries referenced as used. */
+ repeat = 0;
+ do
+ for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
+ asection *sym_sec;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
- asection *sym_sec;
- char *tls_mask;
- char tls_set, tls_clear, tls_type = 0;
- bfd_vma value;
- bfd_boolean ok_tprel, is_local;
+ bfd_vma val;
+
+ r_type = ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ case R_PPC64_TOC16:
+ case R_PPC64_TOC16_LO:
+ case R_PPC64_TOC16_HI:
+ case R_PPC64_TOC16_HA:
+ case R_PPC64_TOC16_DS:
+ case R_PPC64_TOC16_LO_DS:
+ /* In case we're taking addresses of toc entries. */
+ case R_PPC64_ADDR64:
+ break;
+
+ default:
+ continue;
+ }
r_symndx = ELF64_R_SYM (rel->r_info);
- if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
+ if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
{
- err_free_rel:
- if (elf_section_data (sec)->relocs != relstart)
- free (relstart);
- if (locsyms != NULL
- && (elf_tdata (ibfd)->symtab_hdr.contents
- != (unsigned char *) locsyms))
- free (locsyms);
- return FALSE;
+ free (used);
+ goto error_ret;
}
+ if (sym_sec != toc)
+ continue;
+
if (h != NULL)
- {
- if (h->root.type != bfd_link_hash_defined
- && h->root.type != bfd_link_hash_defweak)
- continue;
- value = h->root.u.def.value;
- }
+ val = h->root.u.def.value;
else
- value = sym->st_value;
+ val = sym->st_value;
+ val += rel->r_addend;
- ok_tprel = FALSE;
- is_local = FALSE;
- if (h == NULL
- || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
- {
- is_local = TRUE;
- value += sym_sec->output_offset;
- value += sym_sec->output_section->vma;
- value -= htab->tls_sec->vma;
- ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
- < (bfd_vma) 1 << 32);
- }
+ if (val >= toc->size)
+ continue;
- r_type
- = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
- switch (r_type)
- {
- case R_PPC64_GOT_TLSLD16:
- case R_PPC64_GOT_TLSLD16_LO:
- case R_PPC64_GOT_TLSLD16_HI:
- case R_PPC64_GOT_TLSLD16_HA:
- /* These relocs should never be against a symbol
- defined in a shared lib. Leave them alone if
- that turns out to be the case. */
- htab->tlsld_got.refcount -= 1;
- if (!is_local)
- continue;
+ /* For the toc section, we only mark as used if
+ this entry itself isn't unused. */
+ if (sec == toc
+ && !used[val >> 3]
+ && (used[rel->r_offset >> 3]
+ || !skip[rel->r_offset >> 3]))
+ /* Do all the relocs again, to catch reference
+ chains. */
+ repeat = 1;
+
+ used[val >> 3] = 1;
+ }
+ while (repeat);
+ }
- /* LD -> LE */
- tls_set = 0;
- tls_clear = TLS_LD;
- tls_type = TLS_TLS | TLS_LD;
- expecting_tls_get_addr = 1;
- break;
+ /* Merge the used and skip arrays. Assume that TOC
+ doublewords not appearing as either used or unused belong
+ to to an entry more than one doubleword in size. */
+ for (drop = skip, keep = used, last = 0, some_unused = 0;
+ drop < skip + (toc->size + 7) / 8;
+ ++drop, ++keep)
+ {
+ if (*keep)
+ {
+ *drop = 0;
+ last = 0;
+ }
+ else if (*drop)
+ {
+ some_unused = 1;
+ last = 1;
+ }
+ else
+ *drop = last;
+ }
- case R_PPC64_GOT_TLSGD16:
- case R_PPC64_GOT_TLSGD16_LO:
- case R_PPC64_GOT_TLSGD16_HI:
- case R_PPC64_GOT_TLSGD16_HA:
- if (ok_tprel)
- /* GD -> LE */
- tls_set = 0;
- else
- /* GD -> IE */
- tls_set = TLS_TLS | TLS_TPRELGD;
- tls_clear = TLS_GD;
- tls_type = TLS_TLS | TLS_GD;
- expecting_tls_get_addr = 1;
- break;
+ free (used);
- case R_PPC64_GOT_TPREL16_DS:
- case R_PPC64_GOT_TPREL16_LO_DS:
- case R_PPC64_GOT_TPREL16_HI:
- case R_PPC64_GOT_TPREL16_HA:
- expecting_tls_get_addr = 0;
- if (ok_tprel)
- {
- /* IE -> LE */
- tls_set = 0;
- tls_clear = TLS_TPREL;
- tls_type = TLS_TLS | TLS_TPREL;
- break;
- }
- else
- continue;
+ if (some_unused)
+ {
+ bfd_byte *contents, *src;
+ unsigned long off;
- case R_PPC64_REL14:
- case R_PPC64_REL14_BRTAKEN:
- case R_PPC64_REL14_BRNTAKEN:
- case R_PPC64_REL24:
- if (h != NULL
- && h == htab->tls_get_addr)
- {
- if (!expecting_tls_get_addr
- && rel != relstart
- && ((ELF64_R_TYPE (rel[-1].r_info)
- == R_PPC64_TOC16)
- || (ELF64_R_TYPE (rel[-1].r_info)
- == R_PPC64_TOC16_LO)))
- {
- /* Check for toc tls entries. */
- char *toc_tls;
- int retval;
-
- retval = get_tls_mask (&toc_tls, &locsyms,
- rel - 1, ibfd);
- if (retval == 0)
- goto err_free_rel;
- if (toc_tls != NULL)
- expecting_tls_get_addr = retval > 1;
- }
+ /* Shuffle the toc contents, and at the same time convert the
+ skip array from booleans into offsets. */
+ if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
+ goto error_ret;
- if (expecting_tls_get_addr)
- {
- struct plt_entry *ent;
- for (ent = h->plt.plist; ent; ent = ent->next)
- if (ent->addend == 0)
- {
- if (ent->plt.refcount > 0)
- ent->plt.refcount -= 1;
- break;
- }
- }
- }
- expecting_tls_get_addr = 0;
- continue;
+ elf_section_data (toc)->this_hdr.contents = contents;
- case R_PPC64_TPREL64:
- expecting_tls_get_addr = 0;
- if (ok_tprel)
- {
- /* IE -> LE */
- tls_set = TLS_EXPLICIT;
- tls_clear = TLS_TPREL;
- break;
- }
- else
+ for (src = contents, off = 0, drop = skip;
+ src < contents + toc->size;
+ src += 8, ++drop)
+ {
+ if (*drop)
+ {
+ *drop = (unsigned long) -1;
+ off += 8;
+ }
+ else if (off != 0)
+ {
+ *drop = off;
+ memcpy (src - off, src, 8);
+ }
+ }
+ toc->rawsize = toc->size;
+ toc->size = src - contents - off;
+
+ if (toc->reloc_count != 0)
+ {
+ Elf_Internal_Rela *wrel;
+ bfd_size_type sz;
+
+ /* Read toc relocs. */
+ relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
+ TRUE);
+ if (relstart == NULL)
+ goto error_ret;
+
+ /* Remove unused toc relocs, and adjust those we keep. */
+ wrel = relstart;
+ for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
+ if (skip[rel->r_offset >> 3] != (unsigned long) -1)
+ {
+ wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
+ wrel->r_info = rel->r_info;
+ wrel->r_addend = rel->r_addend;
+ ++wrel;
+ }
+ else if (!dec_dynrel_count (rel->r_info, toc, info,
+ &local_syms, NULL, NULL))
+ goto error_ret;
+
+ toc->reloc_count = wrel - relstart;
+ sz = elf_section_data (toc)->rel_hdr.sh_entsize;
+ elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
+ BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
+ }
+
+ /* Adjust addends for relocs against the toc section sym. */
+ for (sec = ibfd->sections; sec != NULL; sec = sec->next)
+ {
+ if (sec->reloc_count == 0
+ || elf_discarded_section (sec))
+ continue;
+
+ relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
+ TRUE);
+ if (relstart == NULL)
+ goto error_ret;
+
+ for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
+ {
+ enum elf_ppc64_reloc_type r_type;
+ unsigned long r_symndx;
+ asection *sym_sec;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+
+ r_type = ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ default:
continue;
- case R_PPC64_DTPMOD64:
- expecting_tls_get_addr = 0;
- if (rel + 1 < relend
- && (rel[1].r_info
- == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
- && rel[1].r_offset == rel->r_offset + 8)
- {
- if (ok_tprel)
- /* GD -> LE */
- tls_set = TLS_EXPLICIT | TLS_GD;
- else
- /* GD -> IE */
- tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
- tls_clear = TLS_GD;
- }
- else
- {
- if (!is_local)
- continue;
+ case R_PPC64_TOC16:
+ case R_PPC64_TOC16_LO:
+ case R_PPC64_TOC16_HI:
+ case R_PPC64_TOC16_HA:
+ case R_PPC64_TOC16_DS:
+ case R_PPC64_TOC16_LO_DS:
+ case R_PPC64_ADDR64:
+ break;
+ }
- /* LD -> LE */
- tls_set = TLS_EXPLICIT;
- tls_clear = TLS_LD;
- }
- break;
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
+ r_symndx, ibfd))
+ goto error_ret;
- default:
- expecting_tls_get_addr = 0;
+ if (sym_sec != toc || h != NULL || sym->st_value != 0)
continue;
- }
-
- if ((tls_set & TLS_EXPLICIT) == 0)
- {
- struct got_entry *ent;
- /* Adjust got entry for this reloc. */
- if (h != NULL)
- ent = h->got.glist;
- else
- ent = elf_local_got_ents (ibfd)[r_symndx];
+ rel->r_addend -= skip[rel->r_addend >> 3];
+ }
+ }
- for (; ent != NULL; ent = ent->next)
- if (ent->addend == rel->r_addend
- && ent->tls_type == tls_type)
- break;
- if (ent == NULL)
- abort ();
+ /* We shouldn't have local or global symbols defined in the TOC,
+ but handle them anyway. */
+ if (local_syms != NULL)
+ {
+ Elf_Internal_Sym *sym;
- if (tls_set == 0)
+ for (sym = local_syms;
+ sym < local_syms + symtab_hdr->sh_info;
+ ++sym)
+ if (sym->st_value != 0
+ && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
+ {
+ if (skip[sym->st_value >> 3] != (unsigned long) -1)
+ sym->st_value -= skip[sym->st_value >> 3];
+ else
{
- /* We managed to get rid of a got entry. */
- if (ent->got.refcount > 0)
- ent->got.refcount -= 1;
+ (*_bfd_error_handler)
+ (_("%s defined in removed toc entry"),
+ bfd_elf_sym_name (ibfd, symtab_hdr, sym,
+ NULL));
+ sym->st_value = 0;
+ sym->st_shndx = SHN_ABS;
}
+ symtab_hdr->contents = (unsigned char *) local_syms;
}
- else if (h != NULL)
- {
- struct ppc_link_hash_entry * eh;
- struct ppc_dyn_relocs **pp;
- struct ppc_dyn_relocs *p;
-
- /* Adjust dynamic relocs. */
- eh = (struct ppc_link_hash_entry *) h;
- for (pp = &eh->dyn_relocs;
- (p = *pp) != NULL;
- pp = &p->next)
- if (p->sec == sec)
- {
- /* If we got rid of a DTPMOD/DTPREL reloc
- pair then we'll lose one or two dyn
- relocs. */
- if (tls_set == (TLS_EXPLICIT | TLS_GD))
- p->count -= 1;
- p->count -= 1;
- if (p->count == 0)
- *pp = p->next;
- break;
- }
- }
-
- *tls_mask |= tls_set;
- *tls_mask &= ~tls_clear;
- }
+ }
- if (elf_section_data (sec)->relocs != relstart)
- free (relstart);
- }
+ /* Finally, adjust any global syms defined in the toc. */
+ if (toc_inf.global_toc_syms)
+ {
+ toc_inf.toc = toc;
+ toc_inf.skip = skip;
+ toc_inf.global_toc_syms = FALSE;
+ elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
+ &toc_inf);
+ }
+ }
- if (locsyms != NULL
- && (elf_tdata (ibfd)->symtab_hdr.contents
- != (unsigned char *) locsyms))
+ if (local_syms != NULL
+ && symtab_hdr->contents != (unsigned char *) local_syms)
{
if (!info->keep_memory)
- free (locsyms);
+ free (local_syms);
else
- elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
+ symtab_hdr->contents = (unsigned char *) local_syms;
}
+ free (skip);
}
+
return TRUE;
}
-/* This is the condition under which ppc64_elf_finish_dynamic_symbol
- will be called from elflink.h. If elflink.h doesn't call our
- finish_dynamic_symbol routine, we'll need to do something about
- initializing any .plt and .got entries in ppc64_elf_relocate_section. */
-#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
- ((DYN) \
- && ((SHARED) \
- || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
- && ((H)->dynindx != -1 \
- || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
-
/* Allocate space in .plt, .got and associated reloc sections for
dynamic relocs. */
static bfd_boolean
-allocate_dynrelocs (h, inf)
- struct elf_link_hash_entry *h;
- PTR inf;
+allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
for (pent = h->plt.plist; pent != NULL; pent = pent->next)
if (pent->plt.refcount > 0)
{
- BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
-
/* If this is the first .plt entry, make room for the special
first entry. */
- s = htab->splt;
- if (s->_raw_size == 0)
- s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
+ s = htab->plt;
+ if (s->size == 0)
+ s->size += PLT_INITIAL_ENTRY_SIZE;
- pent->plt.offset = s->_raw_size;
+ pent->plt.offset = s->size;
/* Make room for this entry. */
- s->_raw_size += PLT_ENTRY_SIZE;
+ s->size += PLT_ENTRY_SIZE;
/* Make room for the .glink code. */
- s = htab->sglink;
- if (s->_raw_size == 0)
- s->_raw_size += GLINK_CALL_STUB_SIZE;
+ s = htab->glink;
+ if (s->size == 0)
+ s->size += GLINK_CALL_STUB_SIZE;
/* We need bigger stubs past index 32767. */
- if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
- s->_raw_size += 4;
- s->_raw_size += 2*4;
+ if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
+ s->size += 4;
+ s->size += 2*4;
/* We also need to make an entry in the .rela.plt section. */
- s = htab->srelplt;
- s->_raw_size += sizeof (Elf64_External_Rela);
+ s = htab->relplt;
+ s->size += sizeof (Elf64_External_Rela);
doneone = TRUE;
}
else
if (!doneone)
{
h->plt.plist = NULL;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ h->needs_plt = 0;
}
}
else
{
h->plt.plist = NULL;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ h->needs_plt = 0;
}
eh = (struct ppc_link_hash_entry *) h;
for (ent = h->got.glist; ent != NULL; ent = ent->next)
if (ent->got.refcount > 0
&& (ent->tls_type & TLS_TPREL) != 0
- && ent->addend == gent->addend)
+ && ent->addend == gent->addend
+ && ent->owner == gent->owner)
{
gent->got.refcount = 0;
break;
Undefined weak syms won't yet be marked as dynamic,
nor will all TLS symbols. */
if (h->dynindx == -1
- && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ && !h->forced_local)
{
- if (! bfd_elf64_link_record_dynamic_symbol (info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
if ((gent->tls_type & TLS_LD) != 0
- && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
+ && !h->def_dynamic)
{
- gent->got.offset = htab->tlsld_got.offset;
+ ppc64_tlsld_got (gent->owner)->refcount += 1;
+ gent->got.offset = (bfd_vma) -1;
continue;
}
- s = htab->sgot;
- gent->got.offset = s->_raw_size;
- s->_raw_size
+ if (!is_ppc64_elf (gent->owner))
+ continue;
+
+ s = ppc64_elf_tdata (gent->owner)->got;
+ gent->got.offset = s->size;
+ s->size
+= (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
dyn = htab->elf.dynamic_sections_created;
if ((info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
&& (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak))
- htab->srelgot->_raw_size
+ ppc64_elf_tdata (gent->owner)->relgot->size
+= (gent->tls_type & eh->tls_mask & TLS_GD
? 2 * sizeof (Elf64_External_Rela)
: sizeof (Elf64_External_Rela));
if (info->shared)
{
/* Relocs that use pc_count are those that appear on a call insn,
- or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
+ or certain REL relocs (see must_be_dyn_reloc) that can be
generated via assembly. We want calls to protected symbols to
resolve directly to the function rather than going via the plt.
If people want function pointer comparisons to work as expected
/* Also discard relocs on undefined weak syms with non-default
visibility. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ if (eh->dyn_relocs != NULL
&& h->root.type == bfd_link_hash_undefweak)
- eh->dyn_relocs = NULL;
+ {
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
+ eh->dyn_relocs = NULL;
+
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ else if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+ }
}
else if (ELIMINATE_COPY_RELOCS)
{
symbols which turn out to need copy relocs or are not
dynamic. */
- if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ if (!h->non_got_ref
+ && h->def_dynamic
+ && !h->def_regular)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
- && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ && !h->forced_local)
{
- if (! bfd_elf64_link_record_dynamic_symbol (info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
- sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
+ sreloc->size += p->count * sizeof (Elf64_External_Rela);
}
return TRUE;
/* Find any dynamic relocs that apply to read-only sections. */
static bfd_boolean
-readonly_dynrelocs (h, inf)
- struct elf_link_hash_entry *h;
- PTR inf;
+readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
{
- struct bfd_link_info *info = (struct bfd_link_info *) inf;
+ struct bfd_link_info *info = inf;
info->flags |= DF_TEXTREL;
/* Set the sizes of the dynamic sections. */
static bfd_boolean
-ppc64_elf_size_dynamic_sections (output_bfd, info)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
+ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
s = bfd_get_section_by_name (dynobj, ".interp");
if (s == NULL)
abort ();
- s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
- if (htab->tlsld_got.refcount > 0)
- {
- htab->tlsld_got.offset = htab->sgot->_raw_size;
- htab->sgot->_raw_size += 16;
- if (info->shared)
- htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
- }
- else
- htab->tlsld_got.offset = (bfd_vma) -1;
-
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
+ if (!is_ppc64_elf (ibfd))
continue;
for (s = ibfd->sections; s != NULL; s = s->next)
{
struct ppc_dyn_relocs *p;
- for (p = *((struct ppc_dyn_relocs **)
- &elf_section_data (s)->local_dynrel);
- p != NULL;
- p = p->next)
+ for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
{
if (!bfd_is_abs_section (p->sec)
&& bfd_is_abs_section (p->sec->output_section))
else if (p->count != 0)
{
srel = elf_section_data (p->sec)->sreloc;
- srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
+ srel->size += p->count * sizeof (Elf64_External_Rela);
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
info->flags |= DF_TEXTREL;
}
if (!lgot_ents)
continue;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (ibfd);
locsymcount = symtab_hdr->sh_info;
end_lgot_ents = lgot_ents + locsymcount;
lgot_masks = (char *) end_lgot_ents;
- s = htab->sgot;
- srel = htab->srelgot;
+ s = ppc64_elf_tdata (ibfd)->got;
+ srel = ppc64_elf_tdata (ibfd)->relgot;
for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
{
struct got_entry *ent;
{
if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
{
- if (htab->tlsld_got.offset == (bfd_vma) -1)
- {
- htab->tlsld_got.offset = s->_raw_size;
- s->_raw_size += 16;
- if (info->shared)
- srel->_raw_size += sizeof (Elf64_External_Rela);
- }
- ent->got.offset = htab->tlsld_got.offset;
+ ppc64_tlsld_got (ibfd)->refcount += 1;
+ ent->got.offset = (bfd_vma) -1;
}
else
{
- ent->got.offset = s->_raw_size;
+ ent->got.offset = s->size;
if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
{
- s->_raw_size += 16;
+ s->size += 16;
if (info->shared)
- srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
+ srel->size += 2 * sizeof (Elf64_External_Rela);
}
else
{
- s->_raw_size += 8;
+ s->size += 8;
if (info->shared)
- srel->_raw_size += sizeof (Elf64_External_Rela);
+ srel->size += sizeof (Elf64_External_Rela);
}
}
}
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
- elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
+ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
+
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ if (!is_ppc64_elf (ibfd))
+ continue;
+
+ if (ppc64_tlsld_got (ibfd)->refcount > 0)
+ {
+ s = ppc64_elf_tdata (ibfd)->got;
+ ppc64_tlsld_got (ibfd)->offset = s->size;
+ s->size += 16;
+ if (info->shared)
+ {
+ asection *srel = ppc64_elf_tdata (ibfd)->relgot;
+ srel->size += sizeof (Elf64_External_Rela);
+ }
+ }
+ else
+ ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
+ }
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
- /* Reset _cooked_size since prelim layout will set it wrongly,
- and a non-zero _cooked_size sticks. */
- s->_cooked_size = 0;
-
- if (s == htab->sbrlt || s == htab->srelbrlt)
+ if (s == htab->brlt || s == htab->relbrlt)
/* These haven't been allocated yet; don't strip. */
continue;
- else if (s == htab->sgot)
- {
- /* Automatic multiple tocs aren't possible if we are using the
- GOT. The GOT is accessed via r2, so we can't adjust r2.
- FIXME: There's no reason why we couldn't lay out multiple
- GOTs too. */
- if (s->_raw_size > elf_backend_got_header_size)
- htab->no_multi_toc = 1;
- }
- else if (s == htab->splt
- || s == htab->sglink)
+ else if (s == htab->got
+ || s == htab->plt
+ || s == htab->glink
+ || s == htab->dynbss)
{
/* Strip this section if we don't need it; see the
comment below. */
}
- else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
+ else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
{
- if (s->_raw_size == 0)
- {
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rela.bss and
- .rela.plt. We must create both sections in
- create_dynamic_sections, because they must be created
- before the linker maps input sections to output
- sections. The linker does that before
- adjust_dynamic_symbol is called, and it is that
- function which decides whether anything needs to go
- into these sections. */
- }
- else
+ if (s->size != 0)
{
- if (s != htab->srelplt)
+ if (s != htab->relplt)
relocs = TRUE;
/* We use the reloc_count field as a counter if we need
continue;
}
- if (s->_raw_size == 0)
+ if (s->size == 0)
{
- _bfd_strip_section_from_output (info, s);
+ /* If we don't need this section, strip it from the
+ output file. This is mostly to handle .rela.bss and
+ .rela.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ s->flags |= SEC_EXCLUDE;
continue;
}
- /* .plt is in the bss section. We don't initialise it. */
- if ((s->flags & SEC_LOAD) == 0)
+ if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
/* Allocate memory for the section contents. We use bfd_zalloc
sections instead of garbage.
We also rely on the section contents being zero when writing
the GOT. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
+ s->contents = bfd_zalloc (dynobj, s->size);
if (s->contents == NULL)
return FALSE;
}
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ if (!is_ppc64_elf (ibfd))
+ continue;
+
+ s = ppc64_elf_tdata (ibfd)->got;
+ if (s != NULL && s != htab->got)
+ {
+ if (s->size == 0)
+ s->flags |= SEC_EXCLUDE;
+ else
+ {
+ s->contents = bfd_zalloc (ibfd, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
+ }
+ s = ppc64_elf_tdata (ibfd)->relgot;
+ if (s != NULL)
+ {
+ if (s->size == 0)
+ s->flags |= SEC_EXCLUDE;
+ else
+ {
+ s->contents = bfd_zalloc (ibfd, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ relocs = TRUE;
+ s->reloc_count = 0;
+ }
+ }
+ }
+
if (htab->elf.dynamic_sections_created)
{
/* Add some entries to the .dynamic section. We fill in the
the .dynamic section. The DT_DEBUG entry is filled in by the
dynamic linker and used by the debugger. */
#define add_dynamic_entry(TAG, VAL) \
- bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
if (info->executable)
{
return FALSE;
}
- if (htab->splt != NULL && htab->splt->_raw_size != 0)
+ if (htab->plt != NULL && htab->plt->size != 0)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
/* If any dynamic relocs apply to a read-only section,
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
- elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
- (PTR) info);
+ elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
if ((info->flags & DF_TEXTREL) != 0)
{
/* Determine the type of stub needed, if any, for a call. */
-static INLINE enum ppc_stub_type
-ppc_type_of_stub (input_sec, rel, hash, destination)
- asection *input_sec;
- const Elf_Internal_Rela *rel;
- struct ppc_link_hash_entry **hash;
- bfd_vma destination;
+static inline enum ppc_stub_type
+ppc_type_of_stub (asection *input_sec,
+ const Elf_Internal_Rela *rel,
+ struct ppc_link_hash_entry **hash,
+ bfd_vma destination)
{
struct ppc_link_hash_entry *h = *hash;
bfd_vma location;
bfd_vma branch_offset;
bfd_vma max_branch_offset;
- unsigned int r_type;
+ enum elf_ppc64_reloc_type r_type;
if (h != NULL)
{
- if (h->oh != NULL
- && h->oh->dynindx != -1)
+ struct ppc_link_hash_entry *fdh = h;
+ if (fdh->oh != NULL
+ && fdh->oh->is_func_descriptor)
+ fdh = fdh->oh;
+
+ if (fdh->elf.dynindx != -1)
{
struct plt_entry *ent;
- for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
+
+ for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
&& ent->plt.offset != (bfd_vma) -1)
{
- *hash = (struct ppc_link_hash_entry *) h->oh;
+ *hash = fdh;
return ppc_stub_plt_call;
}
}
- if (h->elf.root.type != bfd_link_hash_defined
- && h->elf.root.type != bfd_link_hash_defweak)
+ /* Here, we know we don't have a plt entry. If we don't have a
+ either a defined function descriptor or a defined entry symbol
+ in a regular object file, then it is pointless trying to make
+ any other type of stub. */
+ if (!((fdh->elf.root.type == bfd_link_hash_defined
+ || fdh->elf.root.type == bfd_link_hash_defweak)
+ && fdh->elf.root.u.def.section->output_section != NULL)
+ && !((h->elf.root.type == bfd_link_hash_defined
+ || h->elf.root.type == bfd_link_hash_defweak)
+ && h->elf.root.u.def.section->output_section != NULL))
return ppc_stub_none;
}
/* Determine if a long branch stub is needed. */
max_branch_offset = 1 << 25;
- if (r_type != (unsigned int) R_PPC64_REL24)
+ if (r_type != R_PPC64_REL24)
max_branch_offset = 1 << 15;
if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
/* Build a .plt call stub. */
-static bfd_byte *
-build_plt_stub (obfd, p, offset)
- bfd *obfd;
- bfd_byte *p;
- int offset;
+static inline bfd_byte *
+build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
{
#define PPC_LO(v) ((v) & 0xffff)
#define PPC_HI(v) (((v) >> 16) & 0xffff)
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
- bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
- bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
- bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
- if (PPC_HA (offset + 8) != PPC_HA (offset))
- bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
- offset += 8;
- bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
- if (PPC_HA (offset + 8) != PPC_HA (offset))
- bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
- offset += 8;
- bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
- bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
- bfd_put_32 (obfd, BCTR, p), p += 4;
+ if (PPC_HA (offset) != 0)
+ {
+ if (r != NULL)
+ {
+ r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
+ r[1].r_offset = r[0].r_offset + 8;
+ r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
+ r[1].r_addend = r[0].r_addend;
+ if (PPC_HA (offset + 16) != PPC_HA (offset))
+ {
+ r[2].r_offset = r[1].r_offset + 4;
+ r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
+ r[2].r_addend = r[0].r_addend;
+ }
+ else
+ {
+ r[2].r_offset = r[1].r_offset + 8;
+ r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
+ r[2].r_addend = r[0].r_addend + 8;
+ r[3].r_offset = r[2].r_offset + 4;
+ r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
+ r[3].r_addend = r[0].r_addend + 16;
+ }
+ }
+ bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
+ bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
+ bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
+ if (PPC_HA (offset + 16) != PPC_HA (offset))
+ {
+ bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
+ offset = 0;
+ }
+ bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
+ bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
+ bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
+ bfd_put_32 (obfd, BCTR, p), p += 4;
+ }
+ else
+ {
+ if (r != NULL)
+ {
+ r[0].r_offset += 4;
+ r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
+ if (PPC_HA (offset + 16) != PPC_HA (offset))
+ {
+ r[1].r_offset = r[0].r_offset + 4;
+ r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
+ r[1].r_addend = r[0].r_addend;
+ }
+ else
+ {
+ r[1].r_offset = r[0].r_offset + 8;
+ r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
+ r[1].r_addend = r[0].r_addend + 16;
+ r[2].r_offset = r[1].r_offset + 4;
+ r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
+ r[2].r_addend = r[0].r_addend + 8;
+ }
+ }
+ bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
+ bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
+ if (PPC_HA (offset + 16) != PPC_HA (offset))
+ {
+ bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
+ offset = 0;
+ }
+ bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
+ bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
+ bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
+ bfd_put_32 (obfd, BCTR, p), p += 4;
+ }
return p;
}
+static Elf_Internal_Rela *
+get_relocs (asection *sec, int count)
+{
+ Elf_Internal_Rela *relocs;
+ struct bfd_elf_section_data *elfsec_data;
+
+ elfsec_data = elf_section_data (sec);
+ relocs = elfsec_data->relocs;
+ if (relocs == NULL)
+ {
+ bfd_size_type relsize;
+ relsize = sec->reloc_count * sizeof (*relocs);
+ relocs = bfd_alloc (sec->owner, relsize);
+ if (relocs == NULL)
+ return NULL;
+ elfsec_data->relocs = relocs;
+ elfsec_data->rel_hdr.sh_size = (sec->reloc_count
+ * sizeof (Elf64_External_Rela));
+ elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
+ sec->reloc_count = 0;
+ }
+ relocs += sec->reloc_count;
+ sec->reloc_count += count;
+ return relocs;
+}
+
static bfd_boolean
-ppc_build_one_stub (gen_entry, in_arg)
- struct bfd_hash_entry *gen_entry;
- PTR in_arg;
+ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
{
struct ppc_stub_hash_entry *stub_entry;
struct ppc_branch_hash_entry *br_entry;
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
- asection *stub_sec;
- bfd *stub_bfd;
bfd_byte *loc;
bfd_byte *p;
- unsigned int indx;
struct plt_entry *ent;
- bfd_vma off;
+ bfd_vma dest, off;
int size;
+ Elf_Internal_Rela *r;
/* Massage our args to the form they really have. */
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
- info = (struct bfd_link_info *) in_arg;
+ info = in_arg;
htab = ppc_hash_table (info);
- stub_sec = stub_entry->stub_sec;
/* Make a note of the offset within the stubs for this entry. */
- stub_entry->stub_offset = stub_sec->_cooked_size;
- loc = stub_sec->contents + stub_entry->stub_offset;
-
- if (htab->emit_stub_syms)
- {
- struct elf_link_hash_entry *h;
- h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
- TRUE, FALSE, FALSE);
- if (h == NULL)
- return FALSE;
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = stub_entry->stub_sec;
- h->root.u.def.value = stub_entry->stub_offset;
- h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK
- | ELF_LINK_FORCED_LOCAL);
- }
-
- stub_bfd = stub_sec->owner;
+ stub_entry->stub_offset = stub_entry->stub_sec->size;
+ loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
+ htab->stub_count[stub_entry->stub_type - 1] += 1;
switch (stub_entry->stub_type)
{
case ppc_stub_long_branch:
case ppc_stub_long_branch_r2off:
/* Branches are relative. This is where we are going to. */
- off = (stub_entry->target_value
- + stub_entry->target_section->output_offset
- + stub_entry->target_section->output_section->vma);
+ off = dest = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
/* And this is where we are coming from. */
off -= (stub_entry->stub_offset
- + stub_sec->output_offset
- + stub_sec->output_section->vma);
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma);
- if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
- size = 4;
- else
+ size = 4;
+ if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
{
bfd_vma r2off;
r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
- htab->stub_group[stub_entry->id_sec->id].toc_off);
- bfd_put_32 (stub_bfd, (bfd_vma) STD_R2_40R1, loc);
+ bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R2_R2 | PPC_HA (r2off), loc);
- loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) ADDI_R2_R2 | PPC_LO (r2off), loc);
+ size = 12;
+ if (PPC_HA (r2off) != 0)
+ {
+ size = 16;
+ bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
+ loc += 4;
+ }
+ bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
loc += 4;
- off -= 12;
- size = 16;
+ off -= size - 4;
+ }
+ bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
+
+ if (off + (1 << 25) >= (bfd_vma) (1 << 26))
+ {
+ (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
+ stub_entry->root.string);
+ htab->stub_error = TRUE;
+ return FALSE;
}
- bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
- BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
+ if (info->emitrelocations)
+ {
+ r = get_relocs (stub_entry->stub_sec, 1);
+ if (r == NULL)
+ return FALSE;
+ r->r_offset = loc - stub_entry->stub_sec->contents;
+ r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
+ r->r_addend = dest;
+ if (stub_entry->h != NULL)
+ {
+ struct elf_link_hash_entry **hashes;
+ unsigned long symndx;
+ struct ppc_link_hash_entry *h;
+
+ hashes = elf_sym_hashes (htab->stub_bfd);
+ if (hashes == NULL)
+ {
+ bfd_size_type hsize;
+
+ hsize = (htab->stub_globals + 1) * sizeof (*hashes);
+ hashes = bfd_zalloc (htab->stub_bfd, hsize);
+ if (hashes == NULL)
+ return FALSE;
+ elf_sym_hashes (htab->stub_bfd) = hashes;
+ htab->stub_globals = 1;
+ }
+ symndx = htab->stub_globals++;
+ h = stub_entry->h;
+ hashes[symndx] = &h->elf;
+ r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
+ if (h->oh != NULL && h->oh->is_func)
+ h = h->oh;
+ if (h->elf.root.u.def.section != stub_entry->target_section)
+ /* H is an opd symbol. The addend must be zero. */
+ r->r_addend = 0;
+ else
+ {
+ off = (h->elf.root.u.def.value
+ + h->elf.root.u.def.section->output_offset
+ + h->elf.root.u.def.section->output_section->vma);
+ r->r_addend -= off;
+ }
+ }
+ }
break;
case ppc_stub_plt_branch:
if (br_entry == NULL)
{
(*_bfd_error_handler) (_("can't find branch stub `%s'"),
- stub_entry->root.string + 9);
+ stub_entry->root.string);
htab->stub_error = TRUE;
return FALSE;
}
- off = (stub_entry->target_value
- + stub_entry->target_section->output_offset
- + stub_entry->target_section->output_section->vma);
+ dest = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
- bfd_put_64 (htab->sbrlt->owner, off,
- htab->sbrlt->contents + br_entry->offset);
+ bfd_put_64 (htab->brlt->owner, dest,
+ htab->brlt->contents + br_entry->offset);
- if (info->shared)
+ if (br_entry->iter == htab->stub_iteration)
{
- /* Create a reloc for the branch lookup table entry. */
- Elf_Internal_Rela rela;
- bfd_byte *rl;
-
- rela.r_offset = (br_entry->offset
- + htab->sbrlt->output_offset
- + htab->sbrlt->output_section->vma);
- rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
- rela.r_addend = off;
+ br_entry->iter = 0;
- rl = htab->srelbrlt->contents;
- rl += htab->srelbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, rl);
+ if (htab->relbrlt != NULL)
+ {
+ /* Create a reloc for the branch lookup table entry. */
+ Elf_Internal_Rela rela;
+ bfd_byte *rl;
+
+ rela.r_offset = (br_entry->offset
+ + htab->brlt->output_offset
+ + htab->brlt->output_section->vma);
+ rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
+ rela.r_addend = dest;
+
+ rl = htab->relbrlt->contents;
+ rl += (htab->relbrlt->reloc_count++
+ * sizeof (Elf64_External_Rela));
+ bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
+ }
+ else if (info->emitrelocations)
+ {
+ r = get_relocs (htab->brlt, 1);
+ if (r == NULL)
+ return FALSE;
+ /* brlt, being SEC_LINKER_CREATED does not go through the
+ normal reloc processing. Symbols and offsets are not
+ translated from input file to output file form, so
+ set up the offset per the output file. */
+ r->r_offset = (br_entry->offset
+ + htab->brlt->output_offset
+ + htab->brlt->output_section->vma);
+ r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
+ r->r_addend = dest;
+ }
}
- off = (br_entry->offset
- + htab->sbrlt->output_offset
- + htab->sbrlt->output_section->vma
- - elf_gp (htab->sbrlt->output_section->owner)
+ dest = (br_entry->offset
+ + htab->brlt->output_offset
+ + htab->brlt->output_section->vma);
+
+ off = (dest
+ - elf_gp (htab->brlt->output_section->owner)
- htab->stub_group[stub_entry->id_sec->id].toc_off);
if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
return FALSE;
}
- indx = off;
+ if (info->emitrelocations)
+ {
+ r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
+ if (r == NULL)
+ return FALSE;
+ r[0].r_offset = loc - stub_entry->stub_sec->contents;
+ if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
+ r[0].r_offset += 4;
+ r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
+ r[0].r_addend = dest;
+ if (PPC_HA (off) != 0)
+ {
+ r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
+ r[1].r_offset = r[0].r_offset + 4;
+ r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
+ r[1].r_addend = r[0].r_addend;
+ }
+ }
+
if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
{
- bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
- loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc);
- size = 16;
+ if (PPC_HA (off) != 0)
+ {
+ size = 16;
+ bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
+ loc += 4;
+ bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
+ }
+ else
+ {
+ size = 12;
+ bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
+ }
}
else
{
r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
- htab->stub_group[stub_entry->id_sec->id].toc_off);
- bfd_put_32 (stub_bfd, (bfd_vma) STD_R2_40R1, loc);
- loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
- loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc);
+ bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R2_R2 | PPC_HA (r2off), loc);
- loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) ADDI_R2_R2 | PPC_LO (r2off), loc);
- size = 28;
+ size = 20;
+ if (PPC_HA (off) != 0)
+ {
+ size += 4;
+ bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
+ loc += 4;
+ bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
+ loc += 4;
+ }
+ else
+ {
+ bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
+ loc += 4;
+ }
+
+ if (PPC_HA (r2off) != 0)
+ {
+ size += 4;
+ bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
+ loc += 4;
+ }
+ bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
}
loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc);
+ bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
loc += 4;
- bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc);
+ bfd_put_32 (htab->stub_bfd, BCTR, loc);
break;
case ppc_stub_plt_call:
/* Do the best we can for shared libraries built without
exporting ".foo" for each "foo". This can happen when symbol
versioning scripts strip all bar a subset of symbols. */
- if (stub_entry->h->oh->root.type != bfd_link_hash_defined
- && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
+ if (stub_entry->h->oh != NULL
+ && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
+ && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
{
/* Point the symbol at the stub. There may be multiple stubs,
we don't really care; The main thing is to make this sym
- defined somewhere. */
- stub_entry->h->oh->root.type = bfd_link_hash_defined;
- stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
- stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
+ defined somewhere. Maybe defining the symbol in the stub
+ section is a silly idea. If we didn't do this, htab->top_id
+ could disappear. */
+ stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
+ stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
+ stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
}
/* Now build the stub. */
- off = (bfd_vma) -1;
+ dest = (bfd_vma) -1;
for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == stub_entry->addend)
{
- off = ent->plt.offset;
+ dest = ent->plt.offset;
break;
}
- if (off >= (bfd_vma) -2)
+ if (dest >= (bfd_vma) -2)
abort ();
- off &= ~ (bfd_vma) 1;
- off += (htab->splt->output_offset
- + htab->splt->output_section->vma
- - elf_gp (htab->splt->output_section->owner)
- - htab->stub_group[stub_entry->id_sec->id].toc_off);
+ dest &= ~ (bfd_vma) 1;
+ dest += (htab->plt->output_offset
+ + htab->plt->output_section->vma);
+
+ off = (dest
+ - elf_gp (htab->plt->output_section->owner)
+ - htab->stub_group[stub_entry->id_sec->id].toc_off);
if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
{
return FALSE;
}
- p = build_plt_stub (stub_bfd, loc, (int) off);
+ r = NULL;
+ if (info->emitrelocations)
+ {
+ r = get_relocs (stub_entry->stub_sec,
+ (2 + (PPC_HA (off) != 0)
+ + (PPC_HA (off + 16) == PPC_HA (off))));
+ if (r == NULL)
+ return FALSE;
+ r[0].r_offset = loc - stub_entry->stub_sec->contents;
+ r[0].r_addend = dest;
+ }
+ p = build_plt_stub (htab->stub_bfd, loc, off, r);
size = p - loc;
break;
return FALSE;
}
- stub_sec->_cooked_size += size;
+ stub_entry->stub_sec->size += size;
+
+ if (htab->emit_stub_syms)
+ {
+ struct elf_link_hash_entry *h;
+ size_t len1, len2;
+ char *name;
+ const char *const stub_str[] = { "long_branch",
+ "long_branch_r2off",
+ "plt_branch",
+ "plt_branch_r2off",
+ "plt_call" };
+
+ len1 = strlen (stub_str[stub_entry->stub_type - 1]);
+ len2 = strlen (stub_entry->root.string);
+ name = bfd_malloc (len1 + len2 + 2);
+ if (name == NULL)
+ return FALSE;
+ memcpy (name, stub_entry->root.string, 9);
+ memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
+ memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
+ h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
+ if (h == NULL)
+ return FALSE;
+ if (h->root.type == bfd_link_hash_new)
+ {
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = stub_entry->stub_sec;
+ h->root.u.def.value = stub_entry->stub_offset;
+ h->ref_regular = 1;
+ h->def_regular = 1;
+ h->ref_regular_nonweak = 1;
+ h->forced_local = 1;
+ h->non_elf = 0;
+ }
+ }
+
return TRUE;
}
long_branch stubs won't do. */
static bfd_boolean
-ppc_size_one_stub (gen_entry, in_arg)
- struct bfd_hash_entry *gen_entry;
- PTR in_arg;
+ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
{
struct ppc_stub_hash_entry *stub_entry;
+ struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
bfd_vma off;
int size;
/* Massage our args to the form they really have. */
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
- htab = (struct ppc_link_hash_table *) in_arg;
+ info = in_arg;
+
+ htab = ppc_hash_table (info);
if (stub_entry->stub_type == ppc_stub_plt_call)
{
}
if (off >= (bfd_vma) -2)
abort ();
- off += (htab->splt->output_offset
- + htab->splt->output_section->vma
- - elf_gp (htab->splt->output_section->owner)
+ off += (htab->plt->output_offset
+ + htab->plt->output_section->vma
+ - elf_gp (htab->plt->output_section->owner)
- htab->stub_group[stub_entry->id_sec->id].toc_off);
size = PLT_CALL_STUB_SIZE;
- if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
+ if (PPC_HA (off) == 0)
+ size -= 4;
+ if (PPC_HA (off + 16) != PPC_HA (off))
size += 4;
+ if (info->emitrelocations)
+ {
+ stub_entry->stub_sec->reloc_count
+ += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
+ stub_entry->stub_sec->flags |= SEC_RELOC;
+ }
}
else
{
/* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
variants. */
+ bfd_vma r2off = 0;
+
off = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
- off -= (stub_entry->stub_sec->_raw_size
+ off -= (stub_entry->stub_sec->size
+ stub_entry->stub_sec->output_offset
+ stub_entry->stub_sec->output_section->vma);
size = 4;
if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
{
- off -= 12;
- size = 16;
+ r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
+ - htab->stub_group[stub_entry->id_sec->id].toc_off);
+ size = 12;
+ if (PPC_HA (r2off) != 0)
+ size = 16;
+ off -= size - 4;
}
/* If the branch offset if too big, use a ppc_stub_plt_branch. */
if (br_entry == NULL)
{
(*_bfd_error_handler) (_("can't build branch stub `%s'"),
- stub_entry->root.string + 9);
+ stub_entry->root.string);
htab->stub_error = TRUE;
return FALSE;
}
if (br_entry->iter != htab->stub_iteration)
{
br_entry->iter = htab->stub_iteration;
- br_entry->offset = htab->sbrlt->_raw_size;
- htab->sbrlt->_raw_size += 8;
+ br_entry->offset = htab->brlt->size;
+ htab->brlt->size += 8;
+
+ if (htab->relbrlt != NULL)
+ htab->relbrlt->size += sizeof (Elf64_External_Rela);
+ else if (info->emitrelocations)
+ {
+ htab->brlt->reloc_count += 1;
+ htab->brlt->flags |= SEC_RELOC;
+ }
}
stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
- size = 16;
- if (stub_entry->stub_type != ppc_stub_plt_branch)
- size = 28;
+ off = (br_entry->offset
+ + htab->brlt->output_offset
+ + htab->brlt->output_section->vma
+ - elf_gp (htab->brlt->output_section->owner)
+ - htab->stub_group[stub_entry->id_sec->id].toc_off);
+
+ if (info->emitrelocations)
+ {
+ stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
+ stub_entry->stub_sec->flags |= SEC_RELOC;
+ }
+
+ if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
+ {
+ size = 12;
+ if (PPC_HA (off) != 0)
+ size = 16;
+ }
+ else
+ {
+ size = 20;
+ if (PPC_HA (off) != 0)
+ size += 4;
+
+ if (PPC_HA (r2off) != 0)
+ size += 4;
+ }
+ }
+ else if (info->emitrelocations)
+ {
+ stub_entry->stub_sec->reloc_count += 1;
+ stub_entry->stub_sec->flags |= SEC_RELOC;
}
}
- stub_entry->stub_sec->_raw_size += size;
+ stub_entry->stub_sec->size += size;
return TRUE;
}
0 when no stubs will be needed, and 1 on success. */
int
-ppc64_elf_setup_section_lists (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
+ppc64_elf_setup_section_lists (bfd *output_bfd,
+ struct bfd_link_info *info,
+ int no_multi_toc)
{
bfd *input_bfd;
- int top_id, id;
+ int top_id, top_index, id;
asection *section;
+ asection **input_list;
bfd_size_type amt;
struct ppc_link_hash_table *htab = ppc_hash_table (info);
- if (htab->sbrlt == NULL)
+ htab->no_multi_toc = no_multi_toc;
+
+ if (htab->brlt == NULL)
return 0;
/* Find the top input section id. */
section != NULL;
section = section->next)
{
- if (top_id < section->id)
- top_id = section->id;
+ if (top_id < section->id)
+ top_id = section->id;
+ }
+ }
+
+ htab->top_id = top_id;
+ amt = sizeof (struct map_stub) * (top_id + 1);
+ htab->stub_group = bfd_zmalloc (amt);
+ if (htab->stub_group == NULL)
+ return -1;
+
+ /* Set toc_off for com, und, abs and ind sections. */
+ for (id = 0; id < 3; id++)
+ htab->stub_group[id].toc_off = TOC_BASE_OFF;
+
+ elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
+
+ /* We can't use output_bfd->section_count here to find the top output
+ section index as some sections may have been removed, and
+ strip_excluded_output_sections doesn't renumber the indices. */
+ for (section = output_bfd->sections, top_index = 0;
+ section != NULL;
+ section = section->next)
+ {
+ if (top_index < section->index)
+ top_index = section->index;
+ }
+
+ htab->top_index = top_index;
+ amt = sizeof (asection *) * (top_index + 1);
+ input_list = bfd_zmalloc (amt);
+ htab->input_list = input_list;
+ if (input_list == NULL)
+ return -1;
+
+ return 1;
+}
+
+/* The linker repeatedly calls this function for each TOC input section
+ and linker generated GOT section. Group input bfds such that the toc
+ within a group is less than 64k in size. Will break with cute linker
+ scripts that play games with dot in the output toc section. */
+
+void
+ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
+{
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+
+ if (!htab->no_multi_toc)
+ {
+ bfd_vma addr = isec->output_offset + isec->output_section->vma;
+ bfd_vma off = addr - htab->toc_curr;
+
+ if (off + isec->size > 0x10000)
+ htab->toc_curr = addr;
+
+ elf_gp (isec->owner) = (htab->toc_curr
+ - elf_gp (isec->output_section->owner)
+ + TOC_BASE_OFF);
+ }
+}
+
+/* Called after the last call to the above function. */
+
+void
+ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
+{
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+
+ htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
+
+ /* toc_curr tracks the TOC offset used for code sections below in
+ ppc64_elf_next_input_section. Start off at 0x8000. */
+ htab->toc_curr = TOC_BASE_OFF;
+}
+
+/* No toc references were found in ISEC. If the code in ISEC makes no
+ calls, then there's no need to use toc adjusting stubs when branching
+ into ISEC. Actually, indirect calls from ISEC are OK as they will
+ load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
+ needed, and 2 if a cyclical call-graph was found but no other reason
+ for a stub was detected. If called from the top level, a return of
+ 2 means the same as a return of 0. */
+
+static int
+toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
+{
+ Elf_Internal_Rela *relstart, *rel;
+ Elf_Internal_Sym *local_syms;
+ int ret;
+ struct ppc_link_hash_table *htab;
+
+ /* We know none of our code bearing sections will need toc stubs. */
+ if ((isec->flags & SEC_LINKER_CREATED) != 0)
+ return 0;
+
+ if (isec->size == 0)
+ return 0;
+
+ if (isec->output_section == NULL)
+ return 0;
+
+ if (isec->reloc_count == 0)
+ return 0;
+
+ relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
+ info->keep_memory);
+ if (relstart == NULL)
+ return -1;
+
+ /* Look for branches to outside of this section. */
+ local_syms = NULL;
+ ret = 0;
+ htab = ppc_hash_table (info);
+ for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
+ {
+ enum elf_ppc64_reloc_type r_type;
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+ asection *sym_sec;
+ struct _opd_sec_data *opd;
+ bfd_vma sym_value;
+ bfd_vma dest;
+
+ r_type = ELF64_R_TYPE (rel->r_info);
+ if (r_type != R_PPC64_REL24
+ && r_type != R_PPC64_REL14
+ && r_type != R_PPC64_REL14_BRTAKEN
+ && r_type != R_PPC64_REL14_BRNTAKEN)
+ continue;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
+ isec->owner))
+ {
+ ret = -1;
+ break;
+ }
+
+ /* Calls to dynamic lib functions go through a plt call stub
+ that uses r2. Branches to undefined symbols might be a call
+ using old-style dot symbols that can be satisfied by a plt
+ call into a new-style dynamic library. */
+ if (sym_sec == NULL)
+ {
+ struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
+ if (eh != NULL
+ && eh->oh != NULL
+ && eh->oh->elf.plt.plist != NULL)
+ {
+ ret = 1;
+ break;
+ }
+
+ /* Ignore other undefined symbols. */
+ continue;
+ }
+
+ /* Assume branches to other sections not included in the link need
+ stubs too, to cover -R and absolute syms. */
+ if (sym_sec->output_section == NULL)
+ {
+ ret = 1;
+ break;
+ }
+
+ if (h == NULL)
+ sym_value = sym->st_value;
+ else
+ {
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ abort ();
+ sym_value = h->root.u.def.value;
}
- }
+ sym_value += rel->r_addend;
- amt = sizeof (struct map_stub) * (top_id + 1);
- htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
- if (htab->stub_group == NULL)
- return -1;
+ /* If this branch reloc uses an opd sym, find the code section. */
+ opd = get_opd_info (sym_sec);
+ if (opd != NULL)
+ {
+ if (h == NULL && opd->adjust != NULL)
+ {
+ long adjust;
- /* Set toc_off for com, und, abs and ind sections. */
- for (id = 0; id < 3; id++)
- htab->stub_group[id].toc_off = TOC_BASE_OFF;
+ adjust = opd->adjust[sym->st_value / 8];
+ if (adjust == -1)
+ /* Assume deleted functions won't ever be called. */
+ continue;
+ sym_value += adjust;
+ }
- elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
- return 1;
-}
+ dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
+ if (dest == (bfd_vma) -1)
+ continue;
+ }
+ else
+ dest = (sym_value
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
-/* The linker repeatedly calls this function for each toc input
- section. Group input bfds such that the toc within a group
- is less than 64k in size. Will break with cute linker scripts
- that play games with dot in the output toc section. */
+ /* Ignore branch to self. */
+ if (sym_sec == isec)
+ continue;
-void
-ppc64_elf_next_toc_section (info, isec)
- struct bfd_link_info *info;
- asection *isec;
-{
- struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ /* If the called function uses the toc, we need a stub. */
+ if (sym_sec->has_toc_reloc
+ || sym_sec->makes_toc_func_call)
+ {
+ ret = 1;
+ break;
+ }
- if (!htab->no_multi_toc)
- {
- bfd_vma addr = isec->output_offset + isec->output_section->vma;
- bfd_vma off = addr - htab->toc_curr;
- if (off + isec->_raw_size > 0x10000)
+ /* Assume any branch that needs a long branch stub might in fact
+ need a plt_branch stub. A plt_branch stub uses r2. */
+ else if (dest - (isec->output_offset
+ + isec->output_section->vma
+ + rel->r_offset) + (1 << 25) >= (2 << 25))
{
- htab->toc_curr = addr;
- htab->multi_toc_needed = 1;
+ ret = 1;
+ break;
}
- elf_gp (isec->owner) = (htab->toc_curr
- - elf_gp (isec->output_section->owner)
- + TOC_BASE_OFF);
- }
-}
-/* Called after the last call to the above function. */
+ /* If calling back to a section in the process of being tested, we
+ can't say for sure that no toc adjusting stubs are needed, so
+ don't return zero. */
+ else if (sym_sec->call_check_in_progress)
+ ret = 2;
-void
-ppc64_elf_reinit_toc (output_bfd, info)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
-{
- struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ /* Branches to another section that itself doesn't have any TOC
+ references are OK. Recursively call ourselves to check. */
+ else if (sym_sec->id <= htab->top_id
+ && htab->stub_group[sym_sec->id].toc_off == 0)
+ {
+ int recur;
- /* toc_curr tracks the TOC offset used for code sections below in
- ppc64_elf_next_input_section. Start off at 0x8000. */
- htab->toc_curr = TOC_BASE_OFF;
+ /* Mark current section as indeterminate, so that other
+ sections that call back to current won't be marked as
+ known. */
+ isec->call_check_in_progress = 1;
+ recur = toc_adjusting_stub_needed (info, sym_sec);
+ isec->call_check_in_progress = 0;
+
+ if (recur < 0)
+ {
+ /* An error. Exit. */
+ ret = -1;
+ break;
+ }
+ else if (recur <= 1)
+ {
+ /* Known result. Mark as checked and set section flag. */
+ htab->stub_group[sym_sec->id].toc_off = 1;
+ if (recur != 0)
+ {
+ sym_sec->makes_toc_func_call = 1;
+ ret = 1;
+ break;
+ }
+ }
+ else
+ {
+ /* Unknown result. Continue checking. */
+ ret = 2;
+ }
+ }
+ }
+
+ if (local_syms != NULL
+ && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
+ free (local_syms);
+ if (elf_section_data (isec)->relocs != relstart)
+ free (relstart);
+
+ return ret;
}
/* The linker repeatedly calls this function for each input section,
Build lists of input sections to determine groupings between which
we may insert linker stubs. */
-void
-ppc64_elf_next_input_section (info, isec)
- struct bfd_link_info *info;
- asection *isec;
+bfd_boolean
+ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
- if ((isec->output_section->flags & SEC_CODE) != 0)
+ if ((isec->output_section->flags & SEC_CODE) != 0
+ && isec->output_section->index <= htab->top_index)
{
+ asection **list = htab->input_list + isec->output_section->index;
/* Steal the link_sec pointer for our list. */
#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
/* This happens to make the list in reverse order,
which is what we want. */
- PREV_SEC (isec) = htab->input_list;
- htab->input_list = isec;
+ PREV_SEC (isec) = *list;
+ *list = isec;
}
- /* If a code section has a function that uses the TOC then we need
- to use the right TOC (obviously). Also, make sure that .opd gets
- the correct TOC value. */
- if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
- if (elf_gp (isec->owner) != 0)
- htab->toc_curr = elf_gp (isec->owner);
+ if (htab->multi_toc_needed)
+ {
+ /* If a code section has a function that uses the TOC then we need
+ to use the right TOC (obviously). Also, make sure that .opd gets
+ the correct TOC value for R_PPC64_TOC relocs that don't have or
+ can't find their function symbol (shouldn't ever happen now).
+ Also specially treat .fixup for the linux kernel. .fixup
+ contains branches, but only back to the function that hit an
+ exception. */
+ if (isec->has_toc_reloc
+ || (isec->flags & SEC_CODE) == 0
+ || strcmp (isec->name, ".fixup") == 0)
+ {
+ if (elf_gp (isec->owner) != 0)
+ htab->toc_curr = elf_gp (isec->owner);
+ }
+ else if (htab->stub_group[isec->id].toc_off == 0)
+ {
+ int ret = toc_adjusting_stub_needed (info, isec);
+ if (ret < 0)
+ return FALSE;
+ else
+ isec->makes_toc_func_call = ret & 1;
+ }
+ }
/* Functions that don't use the TOC can belong in any TOC group.
Use the last TOC base. This happens to make _init and _fini
pasting work. */
htab->stub_group[isec->id].toc_off = htab->toc_curr;
+ return TRUE;
}
/* See whether we can group stub sections together. Grouping stub
the middle of a function is not a good idea. */
static void
-group_sections (htab, stub_group_size, stubs_always_before_branch)
- struct ppc_link_hash_table *htab;
- bfd_size_type stub_group_size;
- bfd_boolean stubs_always_before_branch;
+group_sections (struct ppc_link_hash_table *htab,
+ bfd_size_type stub_group_size,
+ bfd_boolean stubs_always_before_branch)
{
- asection *tail = htab->input_list;
- while (tail != NULL)
- {
- asection *curr;
- asection *prev;
- bfd_size_type total;
- bfd_boolean big_sec;
- bfd_vma curr_toc;
-
- curr = tail;
- if (tail->_cooked_size)
- total = tail->_cooked_size;
+ asection **list;
+ bfd_size_type stub14_group_size;
+ bfd_boolean suppress_size_errors;
+
+ suppress_size_errors = FALSE;
+ stub14_group_size = stub_group_size;
+ if (stub_group_size == 1)
+ {
+ /* Default values. */
+ if (stubs_always_before_branch)
+ {
+ stub_group_size = 0x1e00000;
+ stub14_group_size = 0x7800;
+ }
else
- total = tail->_raw_size;
- big_sec = total >= stub_group_size;
- curr_toc = htab->stub_group[tail->id].toc_off;
-
- while ((prev = PREV_SEC (curr)) != NULL
- && ((total += (curr->output_section->vma
- + curr->output_offset
- - prev->output_section->vma
- - prev->output_offset))
- < stub_group_size)
- && htab->stub_group[prev->id].toc_off == curr_toc)
- curr = prev;
-
- /* OK, the size from the start of CURR to the end is less
- than stub_group_size and thus can be handled by one stub
- section. (or the tail section is itself larger than
- stub_group_size, in which case we may be toast.) We
- should really be keeping track of the total size of stubs
- added here, as stubs contribute to the final output
- section size. That's a little tricky, and this way will
- only break if stubs added make the total size more than
- 2^25, ie. for the default stub_group_size, if stubs total
- more than 2097152 bytes, or nearly 75000 plt call stubs. */
- do
- {
- prev = PREV_SEC (tail);
- /* Set up this stub group. */
- htab->stub_group[tail->id].link_sec = curr;
- }
- while (tail != curr && (tail = prev) != NULL);
-
- /* But wait, there's more! Input sections up to stub_group_size
- bytes before the stub section can be handled by it too.
- Don't do this if we have a really large section after the
- stubs, as adding more stubs increases the chance that
- branches may not reach into the stub section. */
- if (!stubs_always_before_branch && !big_sec)
- {
- total = 0;
- while (prev != NULL
- && ((total += (tail->output_section->vma
- + tail->output_offset
- - prev->output_section->vma
- - prev->output_offset))
- < stub_group_size)
+ {
+ stub_group_size = 0x1c00000;
+ stub14_group_size = 0x7000;
+ }
+ suppress_size_errors = TRUE;
+ }
+
+ list = htab->input_list + htab->top_index;
+ do
+ {
+ asection *tail = *list;
+ while (tail != NULL)
+ {
+ asection *curr;
+ asection *prev;
+ bfd_size_type total;
+ bfd_boolean big_sec;
+ bfd_vma curr_toc;
+
+ curr = tail;
+ total = tail->size;
+ big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
+ ? stub14_group_size : stub_group_size);
+ if (big_sec && !suppress_size_errors)
+ (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
+ tail->owner, tail);
+ curr_toc = htab->stub_group[tail->id].toc_off;
+
+ while ((prev = PREV_SEC (curr)) != NULL
+ && ((total += curr->output_offset - prev->output_offset)
+ < (ppc64_elf_section_data (prev)->has_14bit_branch
+ ? stub14_group_size : stub_group_size))
&& htab->stub_group[prev->id].toc_off == curr_toc)
+ curr = prev;
+
+ /* OK, the size from the start of CURR to the end is less
+ than stub_group_size and thus can be handled by one stub
+ section. (or the tail section is itself larger than
+ stub_group_size, in which case we may be toast.) We
+ should really be keeping track of the total size of stubs
+ added here, as stubs contribute to the final output
+ section size. That's a little tricky, and this way will
+ only break if stubs added make the total size more than
+ 2^25, ie. for the default stub_group_size, if stubs total
+ more than 2097152 bytes, or nearly 75000 plt call stubs. */
+ do
{
- tail = prev;
prev = PREV_SEC (tail);
+ /* Set up this stub group. */
htab->stub_group[tail->id].link_sec = curr;
}
+ while (tail != curr && (tail = prev) != NULL);
+
+ /* But wait, there's more! Input sections up to stub_group_size
+ bytes before the stub section can be handled by it too.
+ Don't do this if we have a really large section after the
+ stubs, as adding more stubs increases the chance that
+ branches may not reach into the stub section. */
+ if (!stubs_always_before_branch && !big_sec)
+ {
+ total = 0;
+ while (prev != NULL
+ && ((total += tail->output_offset - prev->output_offset)
+ < (ppc64_elf_section_data (prev)->has_14bit_branch
+ ? stub14_group_size : stub_group_size))
+ && htab->stub_group[prev->id].toc_off == curr_toc)
+ {
+ tail = prev;
+ prev = PREV_SEC (tail);
+ htab->stub_group[tail->id].link_sec = curr;
+ }
+ }
+ tail = prev;
}
- tail = prev;
}
+ while (list-- != htab->input_list);
+ free (htab->input_list);
#undef PREV_SEC
}
instruction. */
bfd_boolean
-ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
- add_stub_section, layout_sections_again)
- bfd *output_bfd;
- bfd *stub_bfd;
- struct bfd_link_info *info;
- bfd_signed_vma group_size;
- asection * (*add_stub_section) PARAMS ((const char *, asection *));
- void (*layout_sections_again) PARAMS ((void));
+ppc64_elf_size_stubs (bfd *output_bfd,
+ struct bfd_link_info *info,
+ bfd_signed_vma group_size,
+ asection *(*add_stub_section) (const char *, asection *),
+ void (*layout_sections_again) (void))
{
bfd_size_type stub_group_size;
bfd_boolean stubs_always_before_branch;
struct ppc_link_hash_table *htab = ppc_hash_table (info);
/* Stash our params away. */
- htab->stub_bfd = stub_bfd;
htab->add_stub_section = add_stub_section;
htab->layout_sections_again = layout_sections_again;
stubs_always_before_branch = group_size < 0;
stub_group_size = -group_size;
else
stub_group_size = group_size;
- if (stub_group_size == 1)
- {
- /* Default values. */
- if (stubs_always_before_branch)
- {
- stub_group_size = 0x1e00000;
- if (htab->has_14bit_branch)
- stub_group_size = 0x7800;
- }
- else
- {
- stub_group_size = 0x1c00000;
- if (htab->has_14bit_branch)
- stub_group_size = 0x7000;
- }
- }
group_sections (htab, stub_group_size, stubs_always_before_branch);
bfd *input_bfd;
unsigned int bfd_indx;
asection *stub_sec;
- bfd_boolean stub_changed;
htab->stub_iteration += 1;
- stub_changed = FALSE;
for (input_bfd = info->input_bfds, bfd_indx = 0;
input_bfd != NULL;
asection *section;
Elf_Internal_Sym *local_syms = NULL;
+ if (!is_ppc64_elf (input_bfd))
+ continue;
+
/* We'll need the symbol table in a second. */
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (input_bfd);
if (symtab_hdr->sh_info == 0)
continue;
/* If there aren't any relocs, then there's nothing more
to do. */
if ((section->flags & SEC_RELOC) == 0
+ || (section->flags & SEC_ALLOC) == 0
+ || (section->flags & SEC_LOAD) == 0
+ || (section->flags & SEC_CODE) == 0
|| section->reloc_count == 0)
continue;
/* Get the relocs. */
internal_relocs
- = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
- (Elf_Internal_Rela *) NULL,
+ = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
info->keep_memory);
if (internal_relocs == NULL)
goto error_ret_free_local;
irelaend = irela + section->reloc_count;
for (; irela < irelaend; irela++)
{
- unsigned int r_type, r_indx;
+ enum elf_ppc64_reloc_type r_type;
+ unsigned int r_indx;
enum ppc_stub_type stub_type;
struct ppc_stub_hash_entry *stub_entry;
- asection *sym_sec;
+ asection *sym_sec, *code_sec;
bfd_vma sym_value;
bfd_vma destination;
+ bfd_boolean ok_dest;
struct ppc_link_hash_entry *hash;
+ struct ppc_link_hash_entry *fdh;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
char *stub_name;
const asection *id_sec;
+ struct _opd_sec_data *opd;
r_type = ELF64_R_TYPE (irela->r_info);
r_indx = ELF64_R_SYM (irela->r_info);
- if (r_type >= (unsigned int) R_PPC64_max)
+ if (r_type >= R_PPC64_max)
{
bfd_set_error (bfd_error_bad_value);
goto error_ret_free_internal;
}
/* Only look for stubs on branch instructions. */
- if (r_type != (unsigned int) R_PPC64_REL24
- && r_type != (unsigned int) R_PPC64_REL14
- && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
- && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
+ if (r_type != R_PPC64_REL24
+ && r_type != R_PPC64_REL14
+ && r_type != R_PPC64_REL14_BRTAKEN
+ && r_type != R_PPC64_REL14_BRNTAKEN)
continue;
/* Now determine the call target, its name, value,
section. */
- destination = 0;
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_indx, input_bfd))
goto error_ret_free_internal;
hash = (struct ppc_link_hash_entry *) h;
+ ok_dest = FALSE;
+ fdh = NULL;
+ sym_value = 0;
if (hash == NULL)
{
- /* It's a local symbol. */
sym_value = sym->st_value;
- destination = (sym_value + irela->r_addend
+ ok_dest = TRUE;
+ }
+ else if (hash->elf.root.type == bfd_link_hash_defined
+ || hash->elf.root.type == bfd_link_hash_defweak)
+ {
+ sym_value = hash->elf.root.u.def.value;
+ if (sym_sec->output_section != NULL)
+ ok_dest = TRUE;
+ }
+ else if (hash->elf.root.type == bfd_link_hash_undefweak
+ || hash->elf.root.type == bfd_link_hash_undefined)
+ {
+ /* Recognise an old ABI func code entry sym, and
+ use the func descriptor sym instead if it is
+ defined. */
+ if (hash->elf.root.root.string[0] == '.'
+ && (fdh = get_fdh (hash, htab)) != NULL)
+ {
+ if (fdh->elf.root.type == bfd_link_hash_defined
+ || fdh->elf.root.type == bfd_link_hash_defweak)
+ {
+ sym_sec = fdh->elf.root.u.def.section;
+ sym_value = fdh->elf.root.u.def.value;
+ if (sym_sec->output_section != NULL)
+ ok_dest = TRUE;
+ }
+ else
+ fdh = NULL;
+ }
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
+ }
+
+ destination = 0;
+ if (ok_dest)
+ {
+ sym_value += irela->r_addend;
+ destination = (sym_value
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
- else
+
+ code_sec = sym_sec;
+ opd = get_opd_info (sym_sec);
+ if (opd != NULL)
{
- /* It's an external symbol. */
- sym_value = 0;
- if (hash->elf.root.type == bfd_link_hash_defined
- || hash->elf.root.type == bfd_link_hash_defweak)
+ bfd_vma dest;
+
+ if (hash == NULL && opd->adjust != NULL)
{
- sym_value = hash->elf.root.u.def.value;
- if (sym_sec->output_section != NULL)
- destination = (sym_value + irela->r_addend
- + sym_sec->output_offset
- + sym_sec->output_section->vma);
+ long adjust = opd->adjust[sym_value / 8];
+ if (adjust == -1)
+ continue;
+ sym_value += adjust;
}
- else if (hash->elf.root.type == bfd_link_hash_undefweak)
- ;
- else if (hash->elf.root.type == bfd_link_hash_undefined)
- ;
- else
+ dest = opd_entry_value (sym_sec, sym_value,
+ &code_sec, &sym_value);
+ if (dest != (bfd_vma) -1)
{
- bfd_set_error (bfd_error_bad_value);
- goto error_ret_free_internal;
+ destination = dest;
+ if (fdh != NULL)
+ {
+ /* Fixup old ABI sym to point at code
+ entry. */
+ hash->elf.root.type = bfd_link_hash_defweak;
+ hash->elf.root.u.def.section = code_sec;
+ hash->elf.root.u.def.value = sym_value;
+ }
}
}
_init and _fini functions, it may be that a
call to what looks like a local sym is in
fact a call needing a TOC adjustment. */
- if (sym_sec != NULL
- && sym_sec->output_section != NULL
- && (htab->stub_group[sym_sec->id].toc_off
- != htab->stub_group[section->id].toc_off))
+ if (code_sec != NULL
+ && code_sec->output_section != NULL
+ && (htab->stub_group[code_sec->id].toc_off
+ != htab->stub_group[section->id].toc_off)
+ && (code_sec->has_toc_reloc
+ || code_sec->makes_toc_func_call))
stub_type = ppc_stub_long_branch_r2off;
}
/* __tls_get_addr calls might be eliminated. */
if (stub_type != ppc_stub_plt_call
&& hash != NULL
- && &hash->elf == htab->tls_get_addr
+ && (hash == htab->tls_get_addr
+ || hash == htab->tls_get_addr_fd)
&& section->has_tls_reloc
&& irela != internal_relocs)
{
/* Get tls info. */
char *tls_mask;
- if (!get_tls_mask (&tls_mask, &local_syms,
+ if (!get_tls_mask (&tls_mask, NULL, &local_syms,
irela - 1, input_bfd))
goto error_ret_free_internal;
if (*tls_mask != 0)
stub_entry->stub_type = stub_type;
stub_entry->target_value = sym_value;
- stub_entry->target_section = sym_sec;
+ stub_entry->target_section = code_sec;
stub_entry->h = hash;
stub_entry->addend = irela->r_addend;
- stub_changed = TRUE;
+
+ if (stub_entry->h != NULL)
+ htab->stub_globals += 1;
}
/* We're done with the internal relocs, free them. */
}
}
- if (!stub_changed)
- break;
-
- /* OK, we've added some stubs. Find out the new size of the
+ /* We may have added some stubs. Find out the new size of the
stub sections. */
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
+ {
+ stub_sec->rawsize = stub_sec->size;
+ stub_sec->size = 0;
+ stub_sec->reloc_count = 0;
+ stub_sec->flags &= ~SEC_RELOC;
+ }
+
+ htab->brlt->size = 0;
+ htab->brlt->reloc_count = 0;
+ htab->brlt->flags &= ~SEC_RELOC;
+ if (htab->relbrlt != NULL)
+ htab->relbrlt->size = 0;
+
+ bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
+
+ if (info->emitrelocations
+ && htab->glink != NULL && htab->glink->size != 0)
{
- stub_sec->_raw_size = 0;
- stub_sec->_cooked_size = 0;
+ htab->glink->reloc_count = 1;
+ htab->glink->flags |= SEC_RELOC;
}
- htab->sbrlt->_raw_size = 0;
- htab->sbrlt->_cooked_size = 0;
- bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
+ && stub_sec->rawsize != stub_sec->size)
+ break;
+
+ /* Exit from this loop when no stubs have been added, and no stubs
+ have changed size. */
+ if (stub_sec == NULL)
+ break;
/* Ask the linker to do its stuff. */
(*htab->layout_sections_again) ();
}
- /* It would be nice to strip .branch_lt from the output if the
+ /* It would be nice to strip htab->brlt from the output if the
section is empty, but it's too late. If we strip sections here,
the dynamic symbol table is corrupted since the section symbol
for the stripped section isn't written. */
move, we'll be called again. Provide a value for TOCstart. */
bfd_vma
-ppc64_elf_toc (obfd)
- bfd *obfd;
+ppc64_elf_toc (bfd *obfd)
{
asection *s;
bfd_vma TOCstart;
hash table. This function is called via gldelf64ppc_finish. */
bfd_boolean
-ppc64_elf_build_stubs (emit_stub_syms, info)
- bfd_boolean emit_stub_syms;
- struct bfd_link_info *info;
+ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
+ struct bfd_link_info *info,
+ char **stats)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
asection *stub_sec;
bfd_byte *p;
+ int stub_sec_count = 0;
htab->emit_stub_syms = emit_stub_syms;
+
+ /* Allocate memory to hold the linker stubs. */
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
- {
- bfd_size_type size;
-
- /* Allocate memory to hold the linker stubs. */
- size = stub_sec->_raw_size;
- if (size != 0)
- {
- stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
- if (stub_sec->contents == NULL)
- return FALSE;
- }
- stub_sec->_cooked_size = 0;
- }
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
+ && stub_sec->size != 0)
+ {
+ stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
+ if (stub_sec->contents == NULL)
+ return FALSE;
+ /* We want to check that built size is the same as calculated
+ size. rawsize is a convenient location to use. */
+ stub_sec->rawsize = stub_sec->size;
+ stub_sec->size = 0;
+ }
- if (htab->splt != NULL)
+ if (htab->glink != NULL && htab->glink->size != 0)
{
unsigned int indx;
bfd_vma plt0;
/* Build the .glink plt call stub. */
- plt0 = (htab->splt->output_section->vma
- + htab->splt->output_offset
- - (htab->sglink->output_section->vma
- + htab->sglink->output_offset
- + GLINK_CALL_STUB_SIZE));
- if (plt0 + 0x80008000 > 0xffffffff)
- {
- (*_bfd_error_handler) (_(".glink and .plt too far apart"));
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
+ if (htab->emit_stub_syms)
+ {
+ struct elf_link_hash_entry *h;
+ h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
+ TRUE, FALSE, FALSE);
+ if (h == NULL)
+ return FALSE;
+ if (h->root.type == bfd_link_hash_new)
+ {
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = htab->glink;
+ h->root.u.def.value = 8;
+ h->ref_regular = 1;
+ h->def_regular = 1;
+ h->ref_regular_nonweak = 1;
+ h->forced_local = 1;
+ h->non_elf = 0;
+ }
}
-
- p = htab->sglink->contents;
- bfd_put_32 (htab->sglink->owner, MFCTR_R12, p);
- p += 4;
- bfd_put_32 (htab->sglink->owner, SLDI_R11_R0_3, p);
- p += 4;
- bfd_put_32 (htab->sglink->owner, ADDIC_R2_R0_32K, p);
- p += 4;
- bfd_put_32 (htab->sglink->owner, SUB_R12_R12_R11, p);
- p += 4;
- bfd_put_32 (htab->sglink->owner, SRADI_R2_R2_63, p);
- p += 4;
- bfd_put_32 (htab->sglink->owner, SLDI_R11_R0_2, p);
+ plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
+ if (info->emitrelocations)
+ {
+ Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
+ if (r == NULL)
+ return FALSE;
+ r->r_offset = (htab->glink->output_offset
+ + htab->glink->output_section->vma);
+ r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
+ r->r_addend = plt0;
+ }
+ p = htab->glink->contents;
+ plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
+ bfd_put_64 (htab->glink->owner, plt0, p);
+ p += 8;
+ bfd_put_32 (htab->glink->owner, MFLR_R12, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, AND_R2_R2_R11, p);
+ bfd_put_32 (htab->glink->owner, BCL_20_31, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, SUB_R12_R12_R11, p);
+ bfd_put_32 (htab->glink->owner, MFLR_R11, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, ADD_R12_R12_R2, p);
+ bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
+ bfd_put_32 (htab->glink->owner, MTLR_R12, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
+ bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
+ bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, LD_R2_0R12 | 8, p);
+ bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, MTCTR_R11, p);
+ bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, LD_R11_0R12 | 16, p);
+ bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
p += 4;
- bfd_put_32 (htab->sglink->owner, BCTR, p);
+ bfd_put_32 (htab->glink->owner, BCTR, p);
p += 4;
+ while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
+ {
+ bfd_put_32 (htab->glink->owner, NOP, p);
+ p += 4;
+ }
/* Build the .glink lazy link call stubs. */
indx = 0;
- while (p < htab->sglink->contents + htab->sglink->_raw_size)
+ while (p < htab->glink->contents + htab->glink->size)
{
if (indx < 0x8000)
{
- bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
+ bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
p += 4;
}
else
{
- bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
+ bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
p += 4;
- bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
+ bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
p += 4;
}
- bfd_put_32 (htab->sglink->owner,
- B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
+ bfd_put_32 (htab->glink->owner,
+ B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
indx++;
p += 4;
}
- htab->sglink->_cooked_size = p - htab->sglink->contents;
+ htab->glink->rawsize = p - htab->glink->contents;
}
- if (htab->sbrlt->_raw_size != 0)
+ if (htab->brlt->size != 0)
{
- htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
- htab->sbrlt->_raw_size);
- if (htab->sbrlt->contents == NULL)
+ htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
+ htab->brlt->size);
+ if (htab->brlt->contents == NULL)
+ return FALSE;
+ }
+ if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
+ {
+ htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
+ htab->relbrlt->size);
+ if (htab->relbrlt->contents == NULL)
return FALSE;
}
/* Build the stubs as directed by the stub hash table. */
bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
+ if (htab->relbrlt != NULL)
+ htab->relbrlt->reloc_count = 0;
+
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
- {
- if (stub_sec->_raw_size != stub_sec->_cooked_size)
- break;
- }
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
+ {
+ stub_sec_count += 1;
+ if (stub_sec->rawsize != stub_sec->size)
+ break;
+ }
if (stub_sec != NULL
- || htab->sglink->_raw_size != htab->sglink->_cooked_size)
+ || htab->glink->rawsize != htab->glink->size)
{
htab->stub_error = TRUE;
(*_bfd_error_handler) (_("stubs don't match calculated size"));
}
- return !htab->stub_error;
+ if (htab->stub_error)
+ return FALSE;
+
+ if (stats != NULL)
+ {
+ *stats = bfd_malloc (500);
+ if (*stats == NULL)
+ return FALSE;
+
+ sprintf (*stats, _("linker stubs in %u group%s\n"
+ " branch %lu\n"
+ " toc adjust %lu\n"
+ " long branch %lu\n"
+ " long toc adj %lu\n"
+ " plt call %lu"),
+ stub_sec_count,
+ stub_sec_count == 1 ? "" : "s",
+ htab->stub_count[ppc_stub_long_branch - 1],
+ htab->stub_count[ppc_stub_long_branch_r2off - 1],
+ htab->stub_count[ppc_stub_plt_branch - 1],
+ htab->stub_count[ppc_stub_plt_branch_r2off - 1],
+ htab->stub_count[ppc_stub_plt_call - 1]);
+ }
+ return TRUE;
+}
+
+/* This function undoes the changes made by add_symbol_adjust. */
+
+static bfd_boolean
+undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
+{
+ struct ppc_link_hash_entry *eh;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
+ return TRUE;
+
+ eh->elf.root.type = bfd_link_hash_undefined;
+ return TRUE;
+}
+
+void
+ppc64_elf_restore_symbols (struct bfd_link_info *info)
+{
+ struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
+}
+
+/* What to do when ld finds relocations against symbols defined in
+ discarded sections. */
+
+static unsigned int
+ppc64_elf_action_discarded (asection *sec)
+{
+ if (strcmp (".opd", sec->name) == 0)
+ return 0;
+
+ if (strcmp (".toc", sec->name) == 0)
+ return 0;
+
+ if (strcmp (".toc1", sec->name) == 0)
+ return 0;
+
+ return _bfd_elf_default_action_discarded (sec);
}
/* The RELOCATE_SECTION function is called by the ELF backend linker
This function is responsible for adjust the section contents as
necessary, and (if using Rela relocs and generating a
- relocateable output file) adjusting the reloc addend as
+ relocatable output file) adjusting the reloc addend as
necessary.
This function does not have to worry about setting the reloc
The global hash table entry for the global symbols can be found
via elf_sym_hashes (input_bfd).
- When generating relocateable output, this function must handle
+ When generating relocatable output, this function must handle
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
going to be the section symbol corresponding to the output
section, which means that the addend must be adjusted
accordingly. */
static bfd_boolean
-ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+ppc64_elf_relocate_section (bfd *output_bfd,
+ struct bfd_link_info *info,
+ bfd *input_bfd,
+ asection *input_section,
+ bfd_byte *contents,
+ Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **local_sections)
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
bfd_boolean is_opd;
/* Disabled until we sort out how ld should choose 'y' vs 'at'. */
bfd_boolean is_power4 = FALSE;
-
- if (info->relocateable)
- return TRUE;
+ bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
/* Initialize howto table if needed. */
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
ppc_howto_init ();
htab = ppc_hash_table (info);
+
+ /* Don't relocate stub sections. */
+ if (input_section->owner == htab->stub_bfd)
+ return TRUE;
+
+ BFD_ASSERT (is_ppc64_elf (input_bfd));
+
local_got_ents = elf_local_got_ents (input_bfd);
TOCstart = elf_gp (output_bfd);
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (input_bfd);
sym_hashes = elf_sym_hashes (input_bfd);
- is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
+ is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
enum elf_ppc64_reloc_type r_type;
- bfd_vma addend;
+ bfd_vma addend, orig_addend;
bfd_reloc_status_type r;
Elf_Internal_Sym *sym;
asection *sec;
- struct elf_link_hash_entry *h;
- struct elf_link_hash_entry *fdh;
+ struct elf_link_hash_entry *h_elf;
+ struct ppc_link_hash_entry *h;
+ struct ppc_link_hash_entry *fdh;
const char *sym_name;
- unsigned long r_symndx;
+ unsigned long r_symndx, toc_symndx;
char tls_mask, tls_gd, tls_type;
+ char sym_type;
bfd_vma relocation;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
- long insn, mask;
+ unsigned long insn, mask;
struct ppc_stub_hash_entry *stub_entry;
bfd_vma max_br_offset;
bfd_vma from;
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info);
+ r_type = ELF64_R_TYPE (rel->r_info);
r_symndx = ELF64_R_SYM (rel->r_info);
- sym = (Elf_Internal_Sym *) 0;
- sec = (asection *) 0;
- h = (struct elf_link_hash_entry *) 0;
- sym_name = (const char *) 0;
+
+ /* For old style R_PPC64_TOC relocs with a zero symbol, use the
+ symbol of the previous ADDR64 reloc. The symbol gives us the
+ proper TOC base to use. */
+ if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
+ && rel != relocs
+ && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
+ && is_opd)
+ r_symndx = ELF64_R_SYM (rel[-1].r_info);
+
+ sym = NULL;
+ sec = NULL;
+ h_elf = NULL;
+ sym_name = NULL;
unresolved_reloc = FALSE;
warned = FALSE;
+ orig_addend = rel->r_addend;
- if (r_type == R_PPC64_TOC)
- {
- /* Relocation value is TOC base. */
- relocation = TOCstart + htab->stub_group[input_section->id].toc_off;
- }
- else if (r_symndx < symtab_hdr->sh_info)
+ if (r_symndx < symtab_hdr->sh_info)
{
/* It's a local symbol. */
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- sym_name = bfd_elf_local_sym_name (input_bfd, sym);
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
- if (elf_section_data (sec) != NULL)
- {
- long *opd_sym_adjust;
+ struct _opd_sec_data *opd;
- opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
- if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
- relocation += opd_sym_adjust[sym->st_value / 24];
- }
- }
- else
- {
- /* It's a global symbol. */
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- sym_name = h->root.root.string;
- relocation = 0;
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+ sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
+ sym_type = ELF64_ST_TYPE (sym->st_info);
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+ opd = get_opd_info (sec);
+ if (opd != NULL && opd->adjust != NULL)
{
- sec = h->root.u.def.section;
- if (sec->output_section == NULL)
- /* Set a flag that will be cleared later if we find a
- relocation value for this symbol. output_section
- is typically NULL for symbols satisfied by a shared
- library. */
- unresolved_reloc = TRUE;
+ long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
+ if (adjust == -1)
+ relocation = 0;
else
- relocation = (h->root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- }
- else if (h->root.type == bfd_link_hash_undefweak)
- ;
- else if (info->shared
- && !info->no_undefined
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
- ;
- else
- {
- if (! ((*info->callbacks->undefined_symbol)
- (info, h->root.root.string, input_bfd, input_section,
- rel->r_offset, (!info->shared
- || info->no_undefined
- || ELF_ST_VISIBILITY (h->other)))))
- return FALSE;
- warned = TRUE;
+ {
+ /* If this is a relocation against the opd section sym
+ and we have edited .opd, adjust the reloc addend so
+ that ld -r and ld --emit-relocs output is correct.
+ If it is a reloc against some other .opd symbol,
+ then the symbol value will be adjusted later. */
+ if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ rel->r_addend += adjust;
+ else
+ relocation += adjust;
+ }
}
}
+ else
+ {
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h_elf, sec, relocation,
+ unresolved_reloc, warned);
+ sym_name = h_elf->root.root.string;
+ sym_type = h_elf->type;
+ }
+ h = (struct ppc_link_hash_entry *) h_elf;
+
+ if (sec != NULL && elf_discarded_section (sec))
+ {
+ /* For relocs against symbols from removed linkonce sections,
+ or sections discarded by a linker script, we just want the
+ section contents zeroed. Avoid any special processing. */
+ _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
+ contents + rel->r_offset);
+ rel->r_info = 0;
+ rel->r_addend = 0;
+ continue;
+ }
+
+ if (info->relocatable)
+ continue;
/* TLS optimizations. Replace instruction sequences and relocs
based on information we collected in tls_optimize. We edit
for the final instruction stream. */
tls_mask = 0;
tls_gd = 0;
+ toc_symndx = 0;
if (IS_PPC64_TLS_RELOC (r_type))
{
if (h != NULL)
- tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
+ tls_mask = h->tls_mask;
else if (local_got_ents != NULL)
{
char *lgot_masks;
lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
tls_mask = lgot_masks[r_symndx];
}
+ if (tls_mask == 0 && r_type == R_PPC64_TLS)
+ {
+ /* Check for toc tls entries. */
+ char *toc_tls;
+
+ if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
+ rel, input_bfd))
+ return FALSE;
+
+ if (toc_tls)
+ tls_mask = *toc_tls;
+ }
+ }
+
+ /* Check that tls relocs are used with tls syms, and non-tls
+ relocs are used with non-tls syms. */
+ if (r_symndx != 0
+ && r_type != R_PPC64_NONE
+ && (h == NULL
+ || h->elf.root.type == bfd_link_hash_defined
+ || h->elf.root.type == bfd_link_hash_defweak)
+ && (IS_PPC64_TLS_RELOC (r_type)
+ != (sym_type == STT_TLS
+ || (sym_type == STT_SECTION
+ && (sec->flags & SEC_THREAD_LOCAL) != 0))))
+ {
+ if (r_type == R_PPC64_TLS && tls_mask != 0)
+ /* R_PPC64_TLS is OK against a symbol in the TOC. */
+ ;
+ else
+ (*_bfd_error_handler)
+ (!IS_PPC64_TLS_RELOC (r_type)
+ ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
+ : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
+ input_bfd,
+ input_section,
+ (long) rel->r_offset,
+ ppc64_elf_howto_table[r_type]->name,
+ sym_name);
}
/* Ensure reloc mapping code below stays sane. */
|| (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
|| (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
abort ();
+
switch (r_type)
{
default:
char *toc_tls;
int retval;
- retval = get_tls_mask (&toc_tls, &local_syms, rel, input_bfd);
+ retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
+ rel, input_bfd);
if (retval == 0)
return FALSE;
{
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
- goto tls_get_addr_check;
+ goto tls_ldgd_opt;
}
else if (retval == 3)
{
if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
- goto tls_get_addr_check;
+ goto tls_ldgd_opt;
}
}
}
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
- bfd_vma insn;
toctprel:
- insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
+ insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
insn &= 31 << 21;
insn |= 0x3c0d0000; /* addis 0,13,0 */
- bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
r_type = R_PPC64_TPREL16_HA;
- rel->r_info = ELF64_R_INFO (r_symndx, r_type);
+ if (toc_symndx != 0)
+ {
+ rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
+ /* We changed the symbol. Start over in order to
+ get h, sym, sec etc. right. */
+ rel--;
+ continue;
+ }
+ else
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
break;
case R_PPC64_TLS:
- if (tls_mask == 0)
- {
- /* Check for toc tls entries. */
- char *toc_tls;
-
- if (!get_tls_mask (&toc_tls, &local_syms, rel, input_bfd))
- return FALSE;
-
- if (toc_tls)
- tls_mask = *toc_tls;
- }
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
- bfd_vma insn, rtra;
+ bfd_vma rtra;
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
- if ((insn & ((31 << 26) | (31 << 11)))
+ if ((insn & ((0x3f << 26) | (31 << 11)))
== ((31 << 26) | (13 << 11)))
rtra = insn & ((1 << 26) - (1 << 16));
- else if ((insn & ((31 << 26) | (31 << 16)))
+ else if ((insn & ((0x3f << 26) | (31 << 16)))
== ((31 << 26) | (13 << 16)))
rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
else
abort ();
insn |= rtra;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
- r_type = R_PPC64_TPREL16_LO;
- rel->r_info = ELF64_R_INFO (r_symndx, r_type);
/* Was PPC64_TLS which sits on insn boundary, now
- PPC64_TPREL16_LO which is at insn+2. */
- rel->r_offset += 2;
+ PPC64_TPREL16_LO which is at low-order half-word. */
+ rel->r_offset += d_offset;
+ r_type = R_PPC64_TPREL16_LO;
+ if (toc_symndx != 0)
+ {
+ rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
+ /* We changed the symbol. Start over in order to
+ get h, sym, sec etc. right. */
+ rel--;
+ continue;
+ }
+ else
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
break;
else
{
bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
- rel->r_offset -= 2;
+ rel->r_offset -= d_offset;
r_type = R_PPC64_NONE;
}
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
case R_PPC64_GOT_TLSGD16_LO:
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
- goto tls_get_addr_check;
+ goto tls_ldgd_opt;
break;
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
{
- tls_get_addr_check:
- if (rel + 1 < relend)
+ bfd_vma insn1, insn2, insn3;
+ bfd_vma offset;
+
+ tls_ldgd_opt:
+ /* We know that the next reloc is on a tls_get_addr
+ call, since ppc64_elf_tls_optimize checks this. */
+ offset = rel[1].r_offset;
+ insn1 = bfd_get_32 (output_bfd,
+ contents + rel->r_offset - d_offset);
+ insn3 = bfd_get_32 (output_bfd,
+ contents + offset + 4);
+ if ((tls_mask & tls_gd) != 0)
{
- enum elf_ppc64_reloc_type r_type2;
- unsigned long r_symndx2;
- struct elf_link_hash_entry *h2;
- bfd_vma insn1, insn2, insn3;
- bfd_vma offset;
-
- /* The next instruction should be a call to
- __tls_get_addr. Peek at the reloc to be sure. */
- r_type2
- = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel[1].r_info);
- r_symndx2 = ELF64_R_SYM (rel[1].r_info);
- if (r_symndx2 < symtab_hdr->sh_info
- || (r_type2 != R_PPC64_REL14
- && r_type2 != R_PPC64_REL14_BRTAKEN
- && r_type2 != R_PPC64_REL14_BRNTAKEN
- && r_type2 != R_PPC64_REL24))
- break;
-
- h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
- while (h2->root.type == bfd_link_hash_indirect
- || h2->root.type == bfd_link_hash_warning)
- h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
- if (h2 == NULL || h2 != htab->tls_get_addr)
- break;
-
- /* OK, it checks out. Replace the call. */
- offset = rel[1].r_offset;
- insn1 = bfd_get_32 (output_bfd,
- contents + rel->r_offset - 2);
- insn3 = bfd_get_32 (output_bfd,
- contents + offset + 4);
- if ((tls_mask & tls_gd) != 0)
- {
- /* IE */
- insn1 &= (1 << 26) - (1 << 2);
- insn1 |= 58 << 26; /* ld */
- insn2 = 0x7c636a14; /* add 3,3,13 */
- rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
- if ((tls_mask & TLS_EXPLICIT) == 0)
- r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
- + R_PPC64_GOT_TPREL16_DS);
- else
- r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
- rel->r_info = ELF64_R_INFO (r_symndx, r_type);
- }
+ /* IE */
+ insn1 &= (1 << 26) - (1 << 2);
+ insn1 |= 58 << 26; /* ld */
+ insn2 = 0x7c636a14; /* add 3,3,13 */
+ rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
+ R_PPC64_NONE);
+ if ((tls_mask & TLS_EXPLICIT) == 0)
+ r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
+ + R_PPC64_GOT_TPREL16_DS);
else
- {
- /* LE */
- insn1 = 0x3c6d0000; /* addis 3,13,0 */
- insn2 = 0x38630000; /* addi 3,3,0 */
- if (tls_gd == 0)
- {
- /* Was an LD reloc. */
- r_symndx = 0;
- rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
- rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
- }
- r_type = R_PPC64_TPREL16_HA;
- rel->r_info = ELF64_R_INFO (r_symndx, r_type);
- rel[1].r_info = ELF64_R_INFO (r_symndx,
- R_PPC64_TPREL16_LO);
- rel[1].r_offset += 2;
- }
- if (insn3 == NOP
- || insn3 == CROR_151515 || insn3 == CROR_313131)
- {
- insn3 = insn2;
- insn2 = NOP;
- rel[1].r_offset += 4;
- }
- bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
- bfd_put_32 (output_bfd, insn2, contents + offset);
- bfd_put_32 (output_bfd, insn3, contents + offset + 4);
+ r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
+ }
+ else
+ {
+ /* LE */
+ insn1 = 0x3c6d0000; /* addis 3,13,0 */
+ insn2 = 0x38630000; /* addi 3,3,0 */
if (tls_gd == 0)
{
- /* We changed the symbol on an LD reloc. Start over
- in order to get h, sym, sec etc. right. */
- rel--;
- continue;
+ /* Was an LD reloc. */
+ if (toc_symndx)
+ sec = local_sections[toc_symndx];
+ for (r_symndx = 0;
+ r_symndx < symtab_hdr->sh_info;
+ r_symndx++)
+ if (local_sections[r_symndx] == sec)
+ break;
+ if (r_symndx >= symtab_hdr->sh_info)
+ r_symndx = 0;
+ rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
+ if (r_symndx != 0)
+ rel->r_addend -= (local_syms[r_symndx].st_value
+ + sec->output_offset
+ + sec->output_section->vma);
+ rel[1].r_addend = rel->r_addend;
}
+ else if (toc_symndx != 0)
+ r_symndx = toc_symndx;
+ r_type = R_PPC64_TPREL16_HA;
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
+ rel[1].r_info = ELF64_R_INFO (r_symndx,
+ R_PPC64_TPREL16_LO);
+ rel[1].r_offset += d_offset;
+ }
+ if (insn3 == NOP
+ || insn3 == CROR_151515 || insn3 == CROR_313131)
+ {
+ insn3 = insn2;
+ insn2 = NOP;
+ rel[1].r_offset += 4;
+ }
+ bfd_put_32 (output_bfd, insn1,
+ contents + rel->r_offset - d_offset);
+ bfd_put_32 (output_bfd, insn2, contents + offset);
+ bfd_put_32 (output_bfd, insn3, contents + offset + 4);
+ if (tls_gd == 0 || toc_symndx != 0)
+ {
+ /* We changed the symbol. Start over in order
+ to get h, sym, sec etc. right. */
+ rel--;
+ continue;
}
}
break;
r_type = R_PPC64_TPREL64;
else
{
- bfd_put_64 (output_bfd, (bfd_vma) 1,
- contents + rel->r_offset);
+ bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
r_type = R_PPC64_NONE;
}
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
{
if ((tls_mask & TLS_LD) == 0)
{
- bfd_put_64 (output_bfd, (bfd_vma) 1,
- contents + rel->r_offset);
+ bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
r_type = R_PPC64_NONE;
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
/* Handle other relocations that tweak non-addend part of insn. */
insn = 0;
+ max_br_offset = 1 << 25;
+ addend = rel->r_addend;
switch (r_type)
{
default:
case R_PPC64_REL14_BRNTAKEN:
insn |= bfd_get_32 (output_bfd,
contents + rel->r_offset) & ~(0x01 << 21);
- if (is_power4)
- {
- /* Set 'a' bit. This is 0b00010 in BO field for branch
- on CR(BI) insns (BO == 001at or 011at), and 0b01000
- for branch on CTR insns (BO == 1a00t or 1a01t). */
- if ((insn & (0x14 << 21)) == (0x04 << 21))
- insn |= 0x02 << 21;
- else if ((insn & (0x14 << 21)) == (0x10 << 21))
- insn |= 0x08 << 21;
- else
- break;
- }
- else
- {
- from = (rel->r_offset
- + input_section->output_offset
- + input_section->output_section->vma);
-
- /* Invert 'y' bit if not the default. */
- if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
- insn ^= 0x01 << 21;
- }
+ /* Fall thru. */
- bfd_put_32 (output_bfd, (bfd_vma) insn, contents + rel->r_offset);
- break;
+ case R_PPC64_REL14:
+ max_br_offset = 1 << 15;
+ /* Fall thru. */
case R_PPC64_REL24:
/* Calls to functions with a different TOC, such as calls to
linkage stubs needs to be followed by a nop, as the nop
will be replaced with an instruction to restore the TOC
base pointer. */
+ stub_entry = NULL;
+ fdh = h;
if (((h != NULL
- && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
- && fdh->plt.plist != NULL)
- || ((fdh = h, sec) != NULL
+ && (((fdh = h->oh) != NULL
+ && fdh->elf.plt.plist != NULL)
+ || (fdh = h)->elf.plt.plist != NULL))
+ || (sec != NULL
&& sec->output_section != NULL
+ && sec->id <= htab->top_id
&& (htab->stub_group[sec->id].toc_off
!= htab->stub_group[input_section->id].toc_off)))
&& (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
|| stub_entry->stub_type == ppc_stub_plt_branch_r2off
|| stub_entry->stub_type == ppc_stub_long_branch_r2off))
{
- bfd_boolean can_plt_call = 0;
+ bfd_boolean can_plt_call = FALSE;
- if (rel->r_offset + 8 <= input_section->_cooked_size)
+ if (rel->r_offset + 8 <= input_section->size)
{
- insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
- if (insn == NOP
- || insn == CROR_151515 || insn == CROR_313131)
+ unsigned long nop;
+ nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
+ if (nop == NOP
+ || nop == CROR_151515 || nop == CROR_313131)
{
- bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
+ bfd_put_32 (input_bfd, LD_R2_40R1,
contents + rel->r_offset + 4);
- can_plt_call = 1;
+ can_plt_call = TRUE;
}
}
if (stub_entry->stub_type == ppc_stub_plt_call)
{
/* If this is a plain branch rather than a branch
- and link, don't require a nop. */
- insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
- if ((insn & 1) == 0)
- can_plt_call = 1;
+ and link, don't require a nop. However, don't
+ allow tail calls in a shared library as they
+ will result in r2 being corrupted. */
+ unsigned long br;
+ br = bfd_get_32 (input_bfd, contents + rel->r_offset);
+ if (info->executable && (br & 1) == 0)
+ can_plt_call = TRUE;
+ else
+ stub_entry = NULL;
+ }
+ else if (h != NULL
+ && strcmp (h->elf.root.root.string,
+ ".__libc_start_main") == 0)
+ {
+ /* Allow crt1 branch to go via a toc adjusting stub. */
+ can_plt_call = TRUE;
}
else
{
|| strcmp (input_section->output_section->name,
".fini") == 0)
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): automatic multiple TOCs "
+ (_("%B(%A+0x%lx): automatic multiple TOCs "
"not supported using your crt files; "
"recompile with -mminimal-toc or upgrade gcc"),
- bfd_archive_filename (input_bfd),
- input_section->name,
+ input_bfd,
+ input_section,
(long) rel->r_offset);
else
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): sibling call optimization to `%s' "
+ (_("%B(%A+0x%lx): sibling call optimization to `%s' "
"does not allow automatic multiple TOCs; "
"recompile with -mminimal-toc or "
"-fno-optimize-sibling-calls, "
"or make `%s' extern"),
- bfd_archive_filename (input_bfd),
- input_section->name,
+ input_bfd,
+ input_section,
(long) rel->r_offset,
sym_name,
sym_name);
}
}
- if (can_plt_call)
+ if (can_plt_call
+ && stub_entry->stub_type == ppc_stub_plt_call)
+ unresolved_reloc = FALSE;
+ }
+
+ if (stub_entry == NULL
+ && get_opd_info (sec) != NULL)
+ {
+ /* The branch destination is the value of the opd entry. */
+ bfd_vma off = (relocation + addend
+ - sec->output_section->vma
+ - sec->output_offset);
+ bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
+ if (dest != (bfd_vma) -1)
{
- relocation = (stub_entry->stub_offset
- + stub_entry->stub_sec->output_offset
- + stub_entry->stub_sec->output_section->vma);
- if (stub_entry->stub_type == ppc_stub_plt_call)
- unresolved_reloc = FALSE;
+ relocation = dest;
+ addend = 0;
}
}
- if (h != NULL
- && h->root.type == bfd_link_hash_undefweak
- && relocation == 0
- && rel->r_addend == 0)
+ /* If the branch is out of reach we ought to have a long
+ branch stub. */
+ from = (rel->r_offset
+ + input_section->output_offset
+ + input_section->output_section->vma);
+
+ if (stub_entry == NULL
+ && (relocation + addend - from + max_br_offset
+ >= 2 * max_br_offset)
+ && r_type != R_PPC64_ADDR14_BRTAKEN
+ && r_type != R_PPC64_ADDR14_BRNTAKEN)
+ stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
+ htab);
+
+ if (stub_entry != NULL)
+ {
+ /* Munge up the value and addend so that we call the stub
+ rather than the procedure directly. */
+ relocation = (stub_entry->stub_offset
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma);
+ addend = 0;
+ }
+
+ if (insn != 0)
+ {
+ if (is_power4)
+ {
+ /* Set 'a' bit. This is 0b00010 in BO field for branch
+ on CR(BI) insns (BO == 001at or 011at), and 0b01000
+ for branch on CTR insns (BO == 1a00t or 1a01t). */
+ if ((insn & (0x14 << 21)) == (0x04 << 21))
+ insn |= 0x02 << 21;
+ else if ((insn & (0x14 << 21)) == (0x10 << 21))
+ insn |= 0x08 << 21;
+ else
+ break;
+ }
+ else
+ {
+ /* Invert 'y' bit if not the default. */
+ if ((bfd_signed_vma) (relocation + addend - from) < 0)
+ insn ^= 0x01 << 21;
+ }
+
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
+ }
+
+ /* NOP out calls to undefined weak functions.
+ We can thus call a weak function without first
+ checking whether the function is defined. */
+ else if (h != NULL
+ && h->elf.root.type == bfd_link_hash_undefweak
+ && r_type == R_PPC64_REL24
+ && relocation == 0
+ && addend == 0)
{
- /* Tweak calls to undefined weak functions to point at a
- blr. We can thus call a weak function without first
- checking whether the function is defined. We have a
- blr at the end of .sfpr. */
- BFD_ASSERT (htab->sfpr->_raw_size != 0);
- relocation = (htab->sfpr->_raw_size - 4
- + htab->sfpr->output_offset
- + htab->sfpr->output_section->vma);
- from = (rel->r_offset
- + input_section->output_offset
- + input_section->output_section->vma);
-
- /* But let's not be silly about it. If the blr isn't in
- reach, just go to the next instruction. */
- if (relocation - from + (1 << 25) >= (1 << 26)
- || htab->sfpr->_raw_size == 0)
- relocation = from + 4;
+ bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
+ continue;
}
break;
}
/* Set `addend'. */
tls_type = 0;
- addend = rel->r_addend;
switch (r_type)
{
default:
(*_bfd_error_handler)
- (_("%s: unknown relocation type %d for symbol %s"),
- bfd_archive_filename (input_bfd), (int) r_type, sym_name);
+ (_("%B: unknown relocation type %d for symbol %s"),
+ input_bfd, (int) r_type, sym_name);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
{
/* Relocation is to the entry for this symbol in the global
offset table. */
+ asection *got;
bfd_vma *offp;
bfd_vma off;
unsigned long indx = 0;
- if (htab->sgot == NULL)
- abort ();
-
if (tls_type == (TLS_TLS | TLS_LD)
&& (h == NULL
- || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
- offp = &htab->tlsld_got.offset;
+ || !h->elf.def_dynamic))
+ offp = &ppc64_tlsld_got (input_bfd)->offset;
else
{
struct got_entry *ent;
if (h != NULL)
{
bfd_boolean dyn = htab->elf.dynamic_sections_created;
- if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
+ if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
+ &h->elf)
|| (info->shared
- && SYMBOL_REFERENCES_LOCAL (info, h)))
+ && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
/* This is actually a static link, or it is a
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
;
else
{
- indx = h->dynindx;
+ indx = h->elf.dynindx;
unresolved_reloc = FALSE;
}
- ent = h->got.glist;
+ ent = h->elf.got.glist;
}
else
{
}
for (; ent != NULL; ent = ent->next)
- if (ent->addend == rel->r_addend
+ if (ent->addend == orig_addend
+ && ent->owner == input_bfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
offp = &ent->got.offset;
}
+ got = ppc64_elf_tdata (input_bfd)->got;
+ if (got == NULL)
+ abort ();
+
/* The offset must always be a multiple of 8. We use the
least significant bit to record whether we have already
processed this entry. */
/* Generate relocs for the dynamic linker, except in
the case of TLSLD where we'll use one entry per
module. */
+ asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
+
*offp = off | 1;
if ((info->shared || indx != 0)
&& (h == NULL
- || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- || h->root.type != bfd_link_hash_undefweak))
+ || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
+ || h->elf.root.type != bfd_link_hash_undefweak))
{
- outrel.r_offset = (htab->sgot->output_section->vma
- + htab->sgot->output_offset
+ outrel.r_offset = (got->output_section->vma
+ + got->output_offset
+ off);
- outrel.r_addend = rel->r_addend;
+ outrel.r_addend = addend;
if (tls_type & (TLS_LD | TLS_GD))
{
outrel.r_addend = 0;
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
if (tls_type == (TLS_TLS | TLS_GD))
{
- loc = htab->srelgot->contents;
- loc += (htab->srelgot->reloc_count++
+ loc = relgot->contents;
+ loc += (relgot->reloc_count++
* sizeof (Elf64_External_Rela));
bfd_elf64_swap_reloca_out (output_bfd,
&outrel, loc);
outrel.r_offset += 8;
- outrel.r_addend = rel->r_addend;
+ outrel.r_addend = addend;
outrel.r_info
= ELF64_R_INFO (indx, R_PPC64_DTPREL64);
}
/* Write the .got section contents for the sake
of prelink. */
- loc = htab->sgot->contents + off;
+ loc = got->contents + off;
bfd_put_64 (output_bfd, outrel.r_addend + relocation,
loc);
}
{
outrel.r_addend += relocation;
if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
- outrel.r_addend -= htab->tls_sec->vma;
+ outrel.r_addend -= htab->elf.tls_sec->vma;
}
- loc = htab->srelgot->contents;
- loc += (htab->srelgot->reloc_count++
+ loc = relgot->contents;
+ loc += (relgot->reloc_count++
* sizeof (Elf64_External_Rela));
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
}
emitting a reloc. */
else
{
- relocation += rel->r_addend;
+ relocation += addend;
if (tls_type == (TLS_TLS | TLS_LD))
relocation = 1;
else if (tls_type != 0)
{
- relocation -= htab->tls_sec->vma + DTP_OFFSET;
+ relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
if (tls_type == (TLS_TLS | TLS_TPREL))
relocation += DTP_OFFSET - TP_OFFSET;
if (tls_type == (TLS_TLS | TLS_GD))
{
bfd_put_64 (output_bfd, relocation,
- htab->sgot->contents + off + 8);
+ got->contents + off + 8);
relocation = 1;
}
}
bfd_put_64 (output_bfd, relocation,
- htab->sgot->contents + off);
+ got->contents + off);
}
}
if (off >= (bfd_vma) -2)
abort ();
- relocation = htab->sgot->output_offset + off;
+ relocation = got->output_offset + off;
/* TOC base (r2) is TOC start plus 0x8000. */
- addend = - TOC_BASE_OFF;
+ addend = -TOC_BASE_OFF;
}
break;
symbol. This happens when statically linking PIC code,
or when using -Bsymbolic. Go find a match if there is a
PLT entry. */
- if (htab->splt != NULL)
+ if (htab->plt != NULL)
{
struct plt_entry *ent;
- for (ent = h->plt.plist; ent != NULL; ent = ent->next)
- if (ent->addend == rel->r_addend
+ for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
+ if (ent->addend == orig_addend
&& ent->plt.offset != (bfd_vma) -1)
{
- relocation = (htab->splt->output_section->vma
- + htab->splt->output_offset
+ relocation = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ ent->plt.offset);
unresolved_reloc = FALSE;
}
}
break;
+ case R_PPC64_TOC:
+ /* Relocation value is TOC base. */
+ relocation = TOCstart;
+ if (r_symndx == 0)
+ relocation += htab->stub_group[input_section->id].toc_off;
+ else if (unresolved_reloc)
+ ;
+ else if (sec != NULL && sec->id <= htab->top_id)
+ relocation += htab->stub_group[sec->id].toc_off;
+ else
+ unresolved_reloc = TRUE;
+ goto dodyn;
+
/* TOC16 relocs. We want the offset relative to the TOC base,
which is the address of the start of the TOC plus 0x8000.
The TOC consists of sections .got, .toc, .tocbss, and .plt,
case R_PPC64_SECTOFF_DS:
case R_PPC64_SECTOFF_LO_DS:
case R_PPC64_SECTOFF_HA:
- if (sec != (asection *) 0)
+ if (sec != NULL)
addend -= sec->output_section->vma;
break;
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
case R_PPC64_TPREL16_HIGHESTA:
- addend -= htab->tls_sec->vma + TP_OFFSET;
+ addend -= htab->elf.tls_sec->vma + TP_OFFSET;
if (info->shared)
/* The TPREL16 relocs shouldn't really be used in shared
libs as they will result in DT_TEXTREL being set, but
case R_PPC64_DTPREL16_HIGHERA:
case R_PPC64_DTPREL16_HIGHEST:
case R_PPC64_DTPREL16_HIGHESTA:
- addend -= htab->tls_sec->vma + DTP_OFFSET;
+ addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
break;
case R_PPC64_DTPMOD64:
goto dodyn;
case R_PPC64_TPREL64:
- addend -= htab->tls_sec->vma + TP_OFFSET;
+ addend -= htab->elf.tls_sec->vma + TP_OFFSET;
goto dodyn;
case R_PPC64_DTPREL64:
- addend -= htab->tls_sec->vma + DTP_OFFSET;
+ addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
/* Fall thru */
/* Relocations that may need to be propagated if this is a
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
- /* r_symndx will be zero only for relocs against symbols
- from removed linkonce sections, or sections discarded by
- a linker script. */
dodyn:
- if (r_symndx == 0)
- break;
- /* Fall thru. */
-
- case R_PPC64_TOC:
if ((input_section->flags & SEC_ALLOC) == 0)
break;
if ((info->shared
&& (h == NULL
- || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- || h->root.type != bfd_link_hash_undefweak)
- && (MUST_BE_DYN_RELOC (r_type)
- || (h != NULL
- && !SYMBOL_CALLS_LOCAL (info, h))))
+ || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
+ || h->elf.root.type != bfd_link_hash_undefweak)
+ && (must_be_dyn_reloc (info, r_type)
+ || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
- && h->dynindx != -1
- && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ && h->elf.dynindx != -1
+ && !h->elf.non_got_ref
+ && h->elf.def_dynamic
+ && !h->elf.def_regular))
{
Elf_Internal_Rela outrel;
bfd_boolean skip, relocate;
asection *sreloc;
bfd_byte *loc;
+ bfd_vma out_off;
/* When generating a dynamic object, these relocations
are copied into the output file to be resolved at run
skip = FALSE;
relocate = FALSE;
- outrel.r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset);
- if (outrel.r_offset == (bfd_vma) -1)
+ out_off = _bfd_elf_section_offset (output_bfd, info,
+ input_section, rel->r_offset);
+ if (out_off == (bfd_vma) -1)
skip = TRUE;
- else if (outrel.r_offset == (bfd_vma) -2)
+ else if (out_off == (bfd_vma) -2)
skip = TRUE, relocate = TRUE;
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
+ out_off += (input_section->output_section->vma
+ + input_section->output_offset);
+ outrel.r_offset = out_off;
outrel.r_addend = rel->r_addend;
+ /* Optimize unaligned reloc use. */
+ if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
+ || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
+ r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
+ else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
+ || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
+ r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
+ else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
+ || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
+ r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
+
if (skip)
memset (&outrel, 0, sizeof outrel);
- else if (h != NULL
- && !SYMBOL_REFERENCES_LOCAL (info, h)
- && !is_opd)
- outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
+ else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
+ && !is_opd
+ && r_type != R_PPC64_TOC)
+ outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
else
{
/* This symbol is local, or marked to become local,
{
long indx = 0;
- if (bfd_is_abs_section (sec))
+ if (r_symndx == 0 || bfd_is_abs_section (sec))
;
else if (sec == NULL || sec->owner == NULL)
{
osec = sec->output_section;
indx = elf_section_data (osec)->dynindx;
+ if (indx == 0)
+ {
+ if ((osec->flags & SEC_READONLY) == 0
+ && htab->elf.data_index_section != NULL)
+ osec = htab->elf.data_index_section;
+ else
+ osec = htab->elf.text_index_section;
+ indx = elf_section_data (osec)->dynindx;
+ }
+ BFD_ASSERT (indx != 0);
+
/* We are turning this relocation into one
against a section symbol, so subtract out
the output section's address but not the
}
}
- /* Optimize unaligned reloc use. */
- if ((ELF64_R_TYPE (outrel.r_info) == R_PPC64_ADDR64
- && (outrel.r_offset & 7) != 0)
- || (ELF64_R_TYPE (outrel.r_info) == R_PPC64_UADDR64
- && (outrel.r_offset & 7) == 0))
- outrel.r_info ^= (ELF64_R_INFO (0, R_PPC64_ADDR64)
- ^ ELF64_R_INFO (0, R_PPC64_UADDR64));
- else if ((ELF64_R_TYPE (outrel.r_info) == R_PPC64_ADDR32
- && (outrel.r_offset & 3) != 0)
- || (ELF64_R_TYPE (outrel.r_info) == R_PPC64_UADDR32
- && (outrel.r_offset & 3) == 0))
- outrel.r_info ^= (ELF64_R_INFO (0, R_PPC64_ADDR32)
- ^ ELF64_R_INFO (0, R_PPC64_UADDR32));
- else if ((ELF64_R_TYPE (outrel.r_info) == R_PPC64_ADDR16
- && (outrel.r_offset & 1) != 0)
- || (ELF64_R_TYPE (outrel.r_info) == R_PPC64_UADDR16
- && (outrel.r_offset & 1) == 0))
- outrel.r_info ^= (ELF64_R_INFO (0, R_PPC64_ADDR16)
- ^ ELF64_R_INFO (0, R_PPC64_UADDR16));
-
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
+ if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
+ >= sreloc->size)
+ abort ();
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
if (r_type == R_PPC64_ADDR64)
addend = outrel.r_addend;
/* Adjust pc_relative relocs to have zero in *r_offset. */
- else if (ppc64_elf_howto_table[(int) r_type]->pc_relative)
+ else if (ppc64_elf_howto_table[r_type]->pc_relative)
addend = (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset);
/* These ones haven't been implemented yet. */
(*_bfd_error_handler)
- (_("%s: relocation %s is not supported for symbol %s."),
- bfd_archive_filename (input_bfd),
- ppc64_elf_howto_table[(int) r_type]->name, sym_name);
+ (_("%B: relocation %s is not supported for symbol %s."),
+ input_bfd,
+ ppc64_elf_howto_table[r_type]->name, sym_name);
bfd_set_error (bfd_error_invalid_operation);
ret = FALSE;
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHESTA:
- case R_PPC64_GOT16_HA:
- case R_PPC64_PLTGOT16_HA:
- case R_PPC64_PLT16_HA:
case R_PPC64_TOC16_HA:
case R_PPC64_SECTOFF_HA:
case R_PPC64_TPREL16_HA:
case R_PPC64_DTPREL16_HA:
- case R_PPC64_GOT_TLSGD16_HA:
- case R_PPC64_GOT_TLSLD16_HA:
- case R_PPC64_GOT_TPREL16_HA:
- case R_PPC64_GOT_DTPREL16_HA:
case R_PPC64_TPREL16_HIGHER:
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
that's not actually defined anywhere. In that case,
'sec' would be NULL, and we should leave the symbol
alone (it will be set to zero elsewhere in the link). */
- if (sec != NULL)
- /* Add 0x10000 if sign bit in 0:15 is set.
- Bits 0:15 are not used. */
- addend += 0x8000;
+ if (sec == NULL)
+ break;
+ /* Fall thru */
+
+ case R_PPC64_GOT16_HA:
+ case R_PPC64_PLTGOT16_HA:
+ case R_PPC64_PLT16_HA:
+ case R_PPC64_GOT_TLSGD16_HA:
+ case R_PPC64_GOT_TLSLD16_HA:
+ case R_PPC64_GOT_TPREL16_HA:
+ case R_PPC64_GOT_DTPREL16_HA:
+ /* Add 0x10000 if sign bit in 0:15 is set.
+ Bits 0:15 are not used. */
+ addend += 0x8000;
break;
case R_PPC64_ADDR16_DS:
_DS relocs bloats all reloc switches in this file. It
doesn't seem to make much sense to use any of these relocs
in data, so testing the insn should be safe. */
- if ((insn & (0x3f << 26)) == (56 << 26))
+ if ((insn & (0x3f << 26)) == (56u << 26))
mask = 15;
if (((relocation + addend) & mask) != 0)
{
(*_bfd_error_handler)
- (_("%s: error: relocation %s not a multiple of %d"),
- bfd_archive_filename (input_bfd),
- ppc64_elf_howto_table[(int) r_type]->name,
+ (_("%B: error: relocation %s not a multiple of %d"),
+ input_bfd,
+ ppc64_elf_howto_table[r_type]->name,
mask + 1);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
}
break;
-
- case R_PPC64_REL14:
- case R_PPC64_REL14_BRNTAKEN:
- case R_PPC64_REL14_BRTAKEN:
- max_br_offset = 1 << 15;
- goto branch_check;
-
- case R_PPC64_REL24:
- max_br_offset = 1 << 25;
-
- branch_check:
- /* If the branch is out of reach or the TOC register needs
- adjusting, then redirect the call to the local stub for
- this function. */
- from = (rel->r_offset
- + input_section->output_offset
- + input_section->output_section->vma);
- if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
- || (sec != NULL
- && sec->output_section != NULL
- && (htab->stub_group[sec->id].toc_off
- != htab->stub_group[input_section->id].toc_off)))
- && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
- rel, htab)) != NULL)
- {
- /* Munge up the value and addend so that we call the stub
- rather than the procedure directly. */
- relocation = (stub_entry->stub_offset
- + stub_entry->stub_sec->output_offset
- + stub_entry->stub_sec->output_section->vma);
- addend = 0;
- }
- break;
}
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
not process them. */
if (unresolved_reloc
&& !((input_section->flags & SEC_DEBUGGING) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
+ && h->elf.def_dynamic))
{
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
+ (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
+ input_bfd,
+ input_section,
(long) rel->r_offset,
ppc64_elf_howto_table[(int) r_type]->name,
- h->root.root.string);
+ h->elf.root.root.string);
ret = FALSE;
}
if (warned)
continue;
if (h != NULL
- && h->root.type == bfd_link_hash_undefweak
- && ppc64_elf_howto_table[(int) r_type]->pc_relative)
+ && h->elf.root.type == bfd_link_hash_undefweak
+ && ppc64_elf_howto_table[r_type]->pc_relative)
{
/* Assume this is a call protected by other code that
detects the symbol is undefined. If this is the case,
}
if (!((*info->callbacks->reloc_overflow)
- (info, sym_name, ppc64_elf_howto_table[(int) r_type]->name,
- rel->r_addend, input_bfd, input_section, rel->r_offset)))
+ (info, (h ? &h->elf.root : NULL), sym_name,
+ ppc64_elf_howto_table[r_type]->name,
+ orig_addend, input_bfd, input_section, rel->r_offset)))
return FALSE;
}
else
{
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
+ (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
+ input_bfd,
+ input_section,
(long) rel->r_offset,
- ppc64_elf_howto_table[(int) r_type]->name,
+ ppc64_elf_howto_table[r_type]->name,
sym_name,
(int) r);
ret = FALSE;
}
}
+ /* If we're emitting relocations, then shortly after this function
+ returns, reloc offsets and addends for this section will be
+ adjusted. Worse, reloc symbol indices will be for the output
+ file rather than the input. Save a copy of the relocs for
+ opd_entry_value. */
+ if (is_opd && (info->emitrelocations || info->relocatable))
+ {
+ bfd_size_type amt;
+ amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
+ rel = bfd_alloc (input_bfd, amt);
+ BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
+ ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
+ if (rel == NULL)
+ return FALSE;
+ memcpy (rel, relocs, amt);
+ }
return ret;
}
+/* Adjust the value of any local symbols in opd sections. */
+
+static bfd_boolean
+ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
+ const char *name ATTRIBUTE_UNUSED,
+ Elf_Internal_Sym *elfsym,
+ asection *input_sec,
+ struct elf_link_hash_entry *h)
+{
+ struct _opd_sec_data *opd;
+ long adjust;
+ bfd_vma value;
+
+ if (h != NULL)
+ return TRUE;
+
+ opd = get_opd_info (input_sec);
+ if (opd == NULL || opd->adjust == NULL)
+ return TRUE;
+
+ value = elfsym->st_value - input_sec->output_offset;
+ if (!info->relocatable)
+ value -= input_sec->output_section->vma;
+
+ adjust = opd->adjust[value / 8];
+ if (adjust == -1)
+ elfsym->st_value = 0;
+ else
+ elfsym->st_value += adjust;
+ return TRUE;
+}
+
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
static bfd_boolean
-ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
- bfd *output_bfd;
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
+ struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
struct ppc_link_hash_table *htab;
- bfd *dynobj;
+ struct plt_entry *ent;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
htab = ppc_hash_table (info);
- dynobj = htab->elf.dynobj;
-
- if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
- {
- struct plt_entry *ent;
- Elf_Internal_Rela rela;
- bfd_byte *loc;
-
- for (ent = h->plt.plist; ent != NULL; ent = ent->next)
- if (ent->plt.offset != (bfd_vma) -1)
- {
- /* This symbol has an entry in the procedure linkage
- table. Set it up. */
-
- if (htab->splt == NULL
- || htab->srelplt == NULL
- || htab->sglink == NULL)
- abort ();
- /* Create a JMP_SLOT reloc to inform the dynamic linker to
- fill in the PLT entry. */
- rela.r_offset = (htab->splt->output_section->vma
- + htab->splt->output_offset
- + ent->plt.offset);
- rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
- rela.r_addend = ent->addend;
-
- loc = htab->srelplt->contents;
- loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
- * sizeof (Elf64_External_Rela));
- bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
- }
- }
+ for (ent = h->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->plt.offset != (bfd_vma) -1)
+ {
+ /* This symbol has an entry in the procedure linkage
+ table. Set it up. */
+
+ if (htab->plt == NULL
+ || htab->relplt == NULL
+ || htab->glink == NULL)
+ abort ();
+
+ /* Create a JMP_SLOT reloc to inform the dynamic linker to
+ fill in the PLT entry. */
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset);
+ rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
+ rela.r_addend = ent->addend;
+
+ loc = htab->relplt->contents;
+ loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
+ * sizeof (Elf64_External_Rela));
+ bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
+ }
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
+ if (h->needs_copy)
{
Elf_Internal_Rela rela;
bfd_byte *loc;
if (h->dynindx == -1
|| (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
- || htab->srelbss == NULL)
+ || htab->relbss == NULL)
abort ();
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
rela.r_addend = 0;
- loc = htab->srelbss->contents;
- loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
+ loc = htab->relbss->contents;
+ loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
-ppc64_elf_reloc_type_class (rela)
- const Elf_Internal_Rela *rela;
+ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
{
enum elf_ppc64_reloc_type r_type;
- r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rela->r_info);
+ r_type = ELF64_R_TYPE (rela->r_info);
switch (r_type)
{
case R_PPC64_RELATIVE:
/* Finish up the dynamic sections. */
static bfd_boolean
-ppc64_elf_finish_dynamic_sections (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
+ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
{
Elf64_External_Dyn *dyncon, *dynconend;
- if (sdyn == NULL || htab->sgot == NULL)
+ if (sdyn == NULL || htab->got == NULL)
abort ();
dyncon = (Elf64_External_Dyn *) sdyn->contents;
- dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+ dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
continue;
case DT_PPC64_GLINK:
- s = htab->sglink;
+ s = htab->glink;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
/* We stupidly defined DT_PPC64_GLINK to be the start
of glink rather than the first entry point, which is
s = bfd_get_section_by_name (output_bfd, ".opd");
if (s == NULL)
continue;
- dyn.d_un.d_val = s->_raw_size;
+ dyn.d_un.d_val = s->size;
break;
case DT_PLTGOT:
- s = htab->splt;
+ s = htab->plt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_JMPREL:
- s = htab->srelplt;
+ s = htab->relplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_PLTRELSZ:
- dyn.d_un.d_val = htab->srelplt->_raw_size;
+ dyn.d_un.d_val = htab->relplt->size;
break;
case DT_RELASZ:
/* Don't count procedure linkage table relocs in the
overall reloc count. */
- s = htab->srelplt;
+ s = htab->relplt;
if (s == NULL)
continue;
- dyn.d_un.d_val -= s->_raw_size;
+ dyn.d_un.d_val -= s->size;
break;
case DT_RELA:
/* We may not be using the standard ELF linker script.
If .rela.plt is the first .rela section, we adjust
DT_RELA to not include it. */
- s = htab->srelplt;
+ s = htab->relplt;
if (s == NULL)
continue;
if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
continue;
- dyn.d_un.d_ptr += s->_raw_size;
+ dyn.d_un.d_ptr += s->size;
break;
}
}
}
- if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
+ if (htab->got != NULL && htab->got->size != 0)
{
/* Fill in the first entry in the global offset table.
We use it to hold the link-time TOCbase. */
bfd_put_64 (output_bfd,
elf_gp (output_bfd) + TOC_BASE_OFF,
- htab->sgot->contents);
+ htab->got->contents);
/* Set .got entry size. */
- elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
+ elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
}
- if (htab->splt != NULL && htab->splt->_raw_size != 0)
+ if (htab->plt != NULL && htab->plt->size != 0)
{
/* Set .plt entry size. */
- elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
+ elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
= PLT_ENTRY_SIZE;
}
+ /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
+ brlt ourselves if emitrelocations. */
+ if (htab->brlt != NULL
+ && htab->brlt->reloc_count != 0
+ && !_bfd_elf_link_output_relocs (output_bfd,
+ htab->brlt,
+ &elf_section_data (htab->brlt)->rel_hdr,
+ elf_section_data (htab->brlt)->relocs,
+ NULL))
+ return FALSE;
+
+ if (htab->glink != NULL
+ && htab->glink->reloc_count != 0
+ && !_bfd_elf_link_output_relocs (output_bfd,
+ htab->glink,
+ &elf_section_data (htab->glink)->rel_hdr,
+ elf_section_data (htab->glink)->relocs,
+ NULL))
+ return FALSE;
+
+ /* We need to handle writing out multiple GOT sections ourselves,
+ since we didn't add them to DYNOBJ. We know dynobj is the first
+ bfd. */
+ while ((dynobj = dynobj->link_next) != NULL)
+ {
+ asection *s;
+
+ if (!is_ppc64_elf (dynobj))
+ continue;
+
+ s = ppc64_elf_tdata (dynobj)->got;
+ if (s != NULL
+ && s->size != 0
+ && s->output_section != bfd_abs_section_ptr
+ && !bfd_set_section_contents (output_bfd, s->output_section,
+ s->contents, s->output_offset,
+ s->size))
+ return FALSE;
+ s = ppc64_elf_tdata (dynobj)->relgot;
+ if (s != NULL
+ && s->size != 0
+ && s->output_section != bfd_abs_section_ptr
+ && !bfd_set_section_contents (output_bfd, s->output_section,
+ s->contents, s->output_offset,
+ s->size))
+ return FALSE;
+ }
+
return TRUE;
}
projects / deliverable / binutils-gdb.git / blobdiff