/* PowerPC64-specific support for 64-bit ELF.
- Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
- Free Software Foundation, Inc.
+ Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+ 2009 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>
+ Largely rewritten by Alan Modra.
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,
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
+
/* 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 "bfd.h"
#include "sysdep.h"
+#include <stdarg.h>
+#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#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_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 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_check_directives ppc64_elf_process_dot_syms
+#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
+#define elf_backend_post_process_headers _bfd_elf_set_osabi
/* 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
/* 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 */
0xfffc, /* dst_mask */
FALSE), /* pcrel_offset */
- /* Marker reloc for TLS. */
+ /* Marker relocs for TLS. */
HOWTO (R_PPC64_TLS,
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* dst_mask */
FALSE), /* pcrel_offset */
+ HOWTO (R_PPC64_TLSGD,
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC64_TLSGD", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_PPC64_TLSLD,
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC64_TLSLD", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
/* Computes the load module index of the load module that contains the
definition of its TLS sym. */
HOWTO (R_PPC64_DTPMOD64,
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
+ HOWTO (R_PPC64_JMP_IREL, /* type */
+ 0, /* rightshift */
+ 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ ppc64_elf_unhandled_reloc, /* special_function */
+ "R_PPC64_JMP_IREL", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_PPC64_IRELATIVE, /* type */
+ 0, /* rightshift */
+ 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
+ 64, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC64_IRELATIVE", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ ONES (64), /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 16 bit relative relocation. */
+ HOWTO (R_PPC64_REL16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC64_REL16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 16 bit relative relocation without overflow. */
+ HOWTO (R_PPC64_REL16_LO, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC64_REL16_LO", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* The high order 16 bits of a relative address. */
+ HOWTO (R_PPC64_REL16_HI, /* type */
+ 16, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_PPC64_REL16_HI", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* The high order 16 bits of a relative address, plus 1 if the contents of
+ the low 16 bits, treated as a signed number, is negative. */
+ HOWTO (R_PPC64_REL16_HA, /* type */
+ 16, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ ppc64_elf_ha_reloc, /* special_function */
+ "R_PPC64_REL16_HA", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
0, /* rightshift */
break;
case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
break;
+ case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
+ break;
+ case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
+ break;
case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
break;
case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
break;
case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
break;
+ case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
+ break;
+ case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
+ break;
+ case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
+ break;
+ case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
+ break;
case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
break;
case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
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
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];
}
asection *got;
asection *relgot;
- union {
- /* 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;
-
- /* Used when adding symbols. */
- bfd_boolean has_dotsym;
- } u;
+ /* 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. */
#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)
{
- bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
- abfd->tdata.any = bfd_zalloc (abfd, amt);
- if (abfd->tdata.any == NULL)
- return FALSE;
- return TRUE;
-}
-
-/* Return 1 if target is one of ours. */
-
-static bfd_boolean
-is_ppc64_elf_target (const struct bfd_target *targ)
-{
- extern const bfd_target bfd_elf64_powerpc_vec;
- extern const bfd_target bfd_elf64_powerpcle_vec;
-
- return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
+ 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
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. */
/* Add extra PPC sections. */
-static struct bfd_elf_special_section const
- ppc64_special_sections_p[]=
-{
- { ".plt", 4, 0, SHT_NOBITS, 0 },
- { NULL, 0, 0, 0, 0 }
-};
-
-static struct bfd_elf_special_section const
- ppc64_special_sections_s[]=
-{
- { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
- { NULL, 0, 0, 0, 0 }
-};
-
-static struct bfd_elf_special_section const
- ppc64_special_sections_t[]=
+static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
{
- { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
- { NULL, 0, 0, 0, 0 }
+ { 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 }
};
-static struct bfd_elf_special_section const *
- ppc64_elf_special_sections[27]=
-{
- NULL, /* 'a' */
- NULL, /* 'b' */
- NULL, /* 'c' */
- NULL, /* 'd' */
- NULL, /* 'e' */
- NULL, /* 'f' */
- NULL, /* 'g' */
- NULL, /* 'h' */
- NULL, /* 'i' */
- NULL, /* 'j' */
- NULL, /* 'k' */
- NULL, /* 'l' */
- NULL, /* 'm' */
- NULL, /* 'n' */
- NULL, /* 'o' */
- ppc64_special_sections_p, /* 'p' */
- NULL, /* 'q' */
- NULL, /* 'r' */
- ppc64_special_sections_s, /* 's' */
- ppc64_special_sections_t, /* 't' */
- NULL, /* 'u' */
- NULL, /* 'v' */
- NULL, /* 'w' */
- NULL, /* 'x' */
- NULL, /* 'y' */
- NULL, /* 'z' */
- NULL /* other */
+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. */
+ struct _toc_sec_data
+ {
+ /* Specifies the relocation symbol index used at a given toc offset. */
+ unsigned *symndx;
+
+ /* And the relocation addend. */
+ bfd_vma *add;
+ } toc;
+ } 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) \
static bfd_boolean
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 = bfd_zalloc (abfd, amt);
- if (sdata == NULL)
- return FALSE;
- sec->used_by_bfd = 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 void *
+static struct _opd_sec_data *
get_opd_info (asection * sec)
{
if (sec != NULL
&& ppc64_elf_section_data (sec) != NULL
- && ppc64_elf_section_data (sec)->opd.adjust != NULL)
- return ppc64_elf_section_data (sec)->opd.adjust;
+ && ppc64_elf_section_data (sec)->sec_type == sec_opd)
+ return &ppc64_elf_section_data (sec)->u.opd;
return NULL;
}
\f
/* Parameters for the qsort hook. */
-static asection *synthetic_opd;
static bfd_boolean synthetic_relocatable;
/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
return 1;
/* then .opd symbols. */
- if (a->section == synthetic_opd && b->section != synthetic_opd)
+ if (strcmp (a->section->name, ".opd") == 0
+ && strcmp (b->section->name, ".opd") != 0)
return -1;
- if (a->section != synthetic_opd && b->section == synthetic_opd)
+ if (strcmp (a->section->name, ".opd") != 0
+ && strcmp (b->section->name, ".opd") == 0)
return 1;
/* then other code symbols. */
if (a->value + a->section->vma > b->value + b->section->vma)
return 1;
+ /* 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;
+
+ if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
+ return 1;
+
+ if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
+ return -1;
+
+ if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
+ return 1;
+
+ if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
+ return -1;
+
+ if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
+ return 1;
+
+ if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
+ return -1;
+
+ if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
+ return 1;
+
return 0;
}
return NULL;
}
+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);
+}
+
/* Create synthetic symbols, effectively restoring "dot-symbol" function
- entry syms. */
+ entry syms. Also generate @plt symbols for the glink branch table. */
static long
ppc64_elf_get_synthetic_symtab (bfd *abfd,
else
memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
- synthetic_opd = opd;
synthetic_relocatable = relocatable;
qsort (syms, symcount, sizeof (*syms), compare_symbols);
}
i = 0;
- if (syms[i]->section == opd)
+ if (strcmp (syms[i]->section->name, ".opd") == 0)
++i;
codesecsym = i;
secsymend = i;
for (; i < symcount; ++i)
- if (syms[i]->section != opd)
+ if (strcmp (syms[i]->section->name, ".opd") != 0)
break;
opdsymend = i;
symcount = i;
count = 0;
- if (opdsymend == secsymend)
- goto done;
if (relocatable)
{
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)
size_t len;
*s = *syms[i];
+ s->flags |= BSF_SYNTHETIC;
s->section = sym->section;
s->value = sym->value + r->addend;
s->name = 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))
{
{
bfd_vma ent;
+ /* Ignore bogus symbols. */
+ if (syms[i]->value > opd->size - 8)
+ continue;
+
ent = bfd_get_64 (abfd, contents + syms[i]->value);
if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
{
}
}
+ /* Get start of .glink stubs from DT_PPC64_GLINK. */
+ if (dyn_count != 0
+ && (dynamic = bfd_get_section_by_name (abfd, ".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 (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");
+ if (p->addend != 0)
+ size += sizeof ("+0x") - 1 + 16;
+ }
+ }
+ }
+
s = *ret = bfd_malloc (size);
if (s == NULL)
goto free_contents_and_exit;
- names = (char *) (s + count);
+ names = (char *) (s + count + plt_count + (resolv_vma != 0));
for (i = secsymend; i < opdsymend; ++i)
{
bfd_vma ent;
+ if (syms[i]->value > opd->size - 8)
+ continue;
+
ent = bfd_get_64 (abfd, contents + syms[i]->value);
if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
{
if ((sec->flags & SEC_CODE) != 0)
s->section = sec;
}
+ s->flags |= BSF_SYNTHETIC;
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, 0, sizeof *s);
+ s->the_bfd = abfd;
+ s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
+ 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->flags |= BSF_SYNTHETIC;
+ 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;
+ if (p->addend != 0)
+ {
+ memcpy (names, "+0x", sizeof ("+0x") - 1);
+ names += sizeof ("+0x") - 1;
+ bfd_sprintf_vma (abfd, names, p->addend);
+ names += strlen (names);
+ }
+ memcpy (names, "@plt", sizeof ("@plt"));
+ names += sizeof ("@plt");
+ s++;
+ glink_vma += 8;
+ if (i >= 0x8000)
+ glink_vma += 4;
+ }
+ count += plt_count;
+ }
}
done:
/* 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.
+ 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;
} plt;
};
-/* Of those relocs that might be copied as dynamic relocs, this macro
+/* 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. */
-#define MUST_BE_DYN_RELOC(RTYPE) \
- ((RTYPE) != R_PPC64_REL32 \
- && (RTYPE) != R_PPC64_REL64 \
- && (RTYPE) != R_PPC64_REL30)
+static int
+must_be_dyn_reloc (struct bfd_link_info *info,
+ enum elf_ppc64_reloc_type r_type)
+{
+ switch (r_type)
+ {
+ default:
+ return 1;
-/* 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
+ 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
ppc_stub_plt_call:
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
- "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
- xxx+16 as appropriate.
+ "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 {
/* The symbol table entry, if any, that this was derived from. */
struct ppc_link_hash_entry *h;
+ struct plt_entry *plt_ent;
/* And the reloc addend that this was derived from. */
bfd_vma addend;
/* 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;
#define TLS_TLS 16 /* Any TLS reloc. */
#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
+#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
char tls_mask;
};
/* 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;
asection *got;
asection *plt;
asection *relplt;
+ asection *iplt;
+ asection *reliplt;
asection *dynbss;
asection *relbss;
asection *glink;
/* Set if we should emit symbols for stubs. */
unsigned int emit_stub_syms:1;
+ /* Set if __tls_get_addr optimization should not be done. */
+ unsigned int no_tls_get_addr_opt:1;
+
/* Support for multiple toc sections. */
unsigned int no_multi_toc:1;
unsigned int multi_toc_needed:1;
/* Set on error. */
unsigned int stub_error:1;
- /* Flag set when small branches are detected. Used to
- select suitable defaults for the stub group size. */
- unsigned int has_14bit_branch:1;
-
- /* Temp used by ppc64_elf_check_directives. */
+ /* Temp used by ppc64_elf_process_dot_syms. */
unsigned int twiddled_syms:1;
/* Incremented every time we size stubs. */
unsigned int stub_iteration;
- /* Small local sym to section mapping cache. */
- struct sym_sec_cache sym_sec;
+ /* Small local sym cache. */
+ struct sym_cache sym_cache;
};
/* Rename some of the generic section flags to better document how they
{
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
- memset (&eh->stub_cache, 0,
+ memset (&eh->u.stub_cache, 0,
(sizeof (struct ppc_link_hash_entry)
- - offsetof (struct ppc_link_hash_entry, stub_cache)));
+ - 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;
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;
/* Initializing two fields of the union is just cosmetic. We really
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);
}
htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
flags);
if (htab->glink == NULL
- || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
+ || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
+ return FALSE;
+
+ flags = SEC_ALLOC | SEC_LINKER_CREATED;
+ htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
+ if (htab->iplt == NULL
+ || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
return FALSE;
- /* Create .branch_lt for plt_branch stubs. */
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
+ ".rela.iplt",
+ flags);
+ if (htab->reliplt == NULL
+ || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
+ return FALSE;
+
+ /* Create branch lookup table for plt_branch stubs. */
flags = (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
|| ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
return FALSE;
- if (info->shared || info->emitrelocations)
- {
- 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)
+ 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 == NULL
+ || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
+ return FALSE;
+
return TRUE;
}
flagword flags;
struct ppc_link_hash_table *htab = ppc_hash_table (info);
+ if (!is_ppc64_elf (abfd))
+ return FALSE;
+
if (!htab->got)
{
if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
- got = bfd_make_section_with_flags (abfd, ".got", flags);
+ 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_with_flags (abfd, ".rela.got",
- flags | SEC_READONLY);
+ relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
+ flags | SEC_READONLY);
if (!relgot
|| ! bfd_set_section_alignment (abfd, relgot, 3))
return FALSE;
return TRUE;
}
+/* Follow indirect and warning symbol links. */
+
+static inline struct bfd_link_hash_entry *
+follow_link (struct bfd_link_hash_entry *h)
+{
+ while (h->type == bfd_link_hash_indirect
+ || h->type == bfd_link_hash_warning)
+ h = h->u.i.link;
+ return h;
+}
+
+static inline struct elf_link_hash_entry *
+elf_follow_link (struct elf_link_hash_entry *h)
+{
+ return (struct elf_link_hash_entry *) follow_link (&h->root);
+}
+
+static inline struct ppc_link_hash_entry *
+ppc_follow_link (struct ppc_link_hash_entry *h)
+{
+ return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
+}
+
/* Merge PLT info on FROM with that on TO. */
static void
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
-ppc64_elf_copy_indirect_symbol
- (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *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;
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->tls_mask |= eind->tls_mask;
+ if (eind->oh != NULL)
+ edir->oh = ppc_follow_link (eind->oh);
/* If called to transfer flags for a weakdef during processing
of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
/* And plt entries. */
move_plt_plist (eind, edir);
- if (edir->elf.dynindx == -1)
+ if (eind->elf.dynindx != -1)
{
+ 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;
}
- else
- BFD_ASSERT (eind->elf.dynindx == -1);
}
/* Find the function descriptor hash entry from the given function code
hash entry FH. Link the entries via their OH fields. */
static struct ppc_link_hash_entry *
-get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
+lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
{
struct ppc_link_hash_entry *fdh = fh->oh;
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 (fdh == NULL)
+ return fdh;
+
+ fdh->is_func_descriptor = 1;
+ fdh->oh = fh;
+ fh->is_func = 1;
+ fh->oh = fdh;
}
- return fdh;
+ return ppc_follow_link (fdh);
}
/* Make a fake function descriptor sym for the code sym FH. */
return fdh;
}
-/* Hacks to support old ABI code.
- 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. */
-
/* Fix function descriptor symbols defined in .opd sections to be
function type. */
static bfd_boolean
-ppc64_elf_add_symbol_hook (bfd *ibfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info,
Elf_Internal_Sym *isym,
- const char **name,
+ 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)
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
+ else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
+ ;
+ else 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);
- if ((*name)[0] == '.'
- && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
- && ELF_ST_TYPE (isym->st_info) < STT_SECTION
- && is_ppc64_elf_target (ibfd->xvec))
- ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
-
return TRUE;
}
most restrictive visibility of the function descriptor and the
function entry symbol is used. */
-struct add_symbol_adjust_data
-{
- struct bfd_link_info *info;
- bfd_boolean ok;
-};
-
static bfd_boolean
-add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
+add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
{
- struct add_symbol_adjust_data *data;
struct ppc_link_hash_table *htab;
- struct ppc_link_hash_entry *eh;
struct ppc_link_hash_entry *fdh;
- if (h->root.type == bfd_link_hash_indirect)
+ if (eh->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 (eh->elf.root.type == bfd_link_hash_warning)
+ eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
- if (h->root.root.string[0] != '.')
- return TRUE;
+ if (eh->elf.root.root.string[0] != '.')
+ abort ();
- data = inf;
- htab = ppc_hash_table (data->info);
- eh = (struct ppc_link_hash_entry *) h;
- fdh = get_fdh (eh, htab);
- if (fdh == NULL
- && !data->info->relocatable
- && (eh->elf.root.type == bfd_link_hash_undefined
- || eh->elf.root.type == bfd_link_hash_undefweak)
- && eh->elf.ref_regular)
- {
- /* 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 (data->info, eh);
- if (fdh == NULL)
- data->ok = FALSE;
- else
- fdh->elf.ref_regular = 1;
+ htab = ppc_hash_table (info);
+ fdh = lookup_fdh (eh, htab);
+ if (fdh == NULL)
+ {
+ if (!info->relocatable
+ && (eh->elf.root.type == bfd_link_hash_undefined
+ || eh->elf.root.type == bfd_link_hash_undefweak)
+ && eh->elf.ref_regular)
+ {
+ /* 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;
+ fdh->elf.ref_regular = 1;
+ }
}
- else if (fdh != NULL)
+ else
{
unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
return TRUE;
}
+/* Process list of dot-symbols we made in link_hash_newfunc. */
+
static bfd_boolean
-ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
+ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
- struct add_symbol_adjust_data data;
-
- if (!is_ppc64_elf_target (abfd->xvec))
- return TRUE;
-
- if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
- return TRUE;
- ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
+ struct ppc_link_hash_entry **p, *eh;
htab = ppc_hash_table (info);
- if (!is_ppc64_elf_target (htab->elf.root.creator))
+ if (!is_ppc64_elf (info->output_bfd))
return TRUE;
- data.info = info;
- data.ok = TRUE;
- elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
+ if (is_ppc64_elf (ibfd))
+ {
+ p = &htab->dot_syms;
+ while ((eh = *p) != NULL)
+ {
+ *p = NULL;
+ if (!add_symbol_adjust (eh, info))
+ return FALSE;
+ p = &eh->u.next_dot_sym;
+ }
+ }
+
+ /* 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. */
bfd_link_repair_undef_list (&htab->elf.root);
htab->twiddled_syms = 0;
}
- return data.ok;
+ 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 struct plt_entry **
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);
+ struct plt_entry **local_plt;
char *local_got_tls_masks;
if (local_got_ents == NULL)
{
bfd_size_type size = symtab_hdr->sh_info;
- size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
+ size *= (sizeof (*local_got_ents)
+ + sizeof (*local_plt)
+ + sizeof (*local_got_tls_masks));
local_got_ents = bfd_zalloc (abfd, size);
if (local_got_ents == NULL)
- return FALSE;
+ return NULL;
elf_local_got_ents (abfd) = local_got_ents;
}
- if ((tls_type & TLS_EXPLICIT) == 0)
+ if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
{
struct got_entry *ent;
ent->got.refcount += 1;
}
- local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
+ local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
+ local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
local_got_tls_masks[r_symndx] |= tls_type;
- return TRUE;
+
+ return local_plt + r_symndx;
}
static bfd_boolean
-update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
+update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
{
struct plt_entry *ent;
- for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
+ for (ent = *plist; ent != NULL; ent = ent->next)
if (ent->addend == addend)
break;
if (ent == NULL)
ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
- ent->next = eh->elf.plt.plist;
+ ent->next = *plist;
ent->addend = addend;
ent->plt.refcount = 0;
- eh->elf.plt.plist = ent;
+ *plist = ent;
}
ent->plt.refcount += 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;
}
+static bfd_boolean
+is_branch_reloc (enum elf_ppc64_reloc_type r_type)
+{
+ return (r_type == R_PPC64_REL24
+ || r_type == R_PPC64_REL14
+ || r_type == R_PPC64_REL14_BRTAKEN
+ || r_type == R_PPC64_REL14_BRNTAKEN
+ || r_type == R_PPC64_ADDR24
+ || r_type == R_PPC64_ADDR14
+ || r_type == R_PPC64_ADDR14_BRTAKEN
+ || r_type == R_PPC64_ADDR14_BRNTAKEN);
+}
+
/* Look through the relocs for a section during the first phase, and
calculate needed space in the global offset table, procedure
linkage table, and dynamic reloc sections. */
const Elf_Internal_Rela *rel_end;
asection *sreloc;
asection **opd_sym_map;
+ struct elf_link_hash_entry *tga, *dottga;
if (info->relocatable)
return TRUE;
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;
+ tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
+ FALSE, FALSE, TRUE);
+ dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
+ FALSE, FALSE, TRUE);
+ 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->size * sizeof (union opd_info) / 8;
+ 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->sfpr == NULL
unsigned long r_symndx;
struct elf_link_hash_entry *h;
enum elf_ppc64_reloc_type r_type;
- int tls_type = 0;
+ int tls_type;
+ struct _ppc64_elf_section_data *ppc64_sec;
+ struct plt_entry **ifunc;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
else
{
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;
+ h = elf_follow_link (h);
+ }
+
+ tls_type = 0;
+ ifunc = NULL;
+ if (h != NULL)
+ {
+ if (h->type == STT_GNU_IFUNC)
+ {
+ h->needs_plt = 1;
+ ifunc = &h->plt.plist;
+ }
}
+ else
+ {
+ Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ {
+ ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
+ rel->r_addend, PLT_IFUNC);
+ if (ifunc == NULL)
+ return FALSE;
+ }
+ }
r_type = ELF64_R_TYPE (rel->r_info);
+ if (is_branch_reloc (r_type))
+ {
+ if (h != NULL && (h == tga || h == dottga))
+ {
+ if (rel != relocs
+ && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
+ || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
+ /* We have a new-style __tls_get_addr call with a marker
+ reloc. */
+ ;
+ else
+ /* Mark this section as having an old-style call. */
+ sec->has_tls_get_addr_call = 1;
+ }
+
+ /* STT_GNU_IFUNC symbols must have a PLT entry. */
+ if (ifunc != NULL
+ && !update_plt_info (abfd, ifunc, rel->r_addend))
+ return FALSE;
+ }
+
switch (r_type)
{
+ case R_PPC64_TLSGD:
+ case R_PPC64_TLSLD:
+ /* These special tls relocs tie a call to __tls_get_addr with
+ its parameter symbol. */
+ break;
+
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
- ppc64_tlsld_got (abfd)->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;
return FALSE;
}
else
- if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
- rel->r_addend))
- return FALSE;
+ {
+ if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
+ return FALSE;
+ h->needs_plt = 1;
+ if (h->root.root.string[0] == '.'
+ && h->root.root.string[1] != '\0')
+ ((struct ppc_link_hash_entry *) h)->is_func = 1;
+ }
break;
/* The following relocations don't need to propagate the
break;
/* Nor do these. */
+ case R_PPC64_REL16:
+ case R_PPC64_REL16_LO:
+ case R_PPC64_REL16_HI:
+ case R_PPC64_REL16_HA:
+ break;
+
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_PPC64_GNU_VTENTRY:
- if (!bfd_elf_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
+ {
+ Elf_Internal_Sym *isym;
+
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+
+ dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ }
+
+ if (dest != sec)
+ ppc64_elf_section_data (sec)->has_14bit_branch = 1;
+ }
/* Fall through. */
case R_PPC64_REL24:
- if (h != NULL)
+ if (h != NULL && ifunc == 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))
+ if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
return FALSE;
- if (h == &htab->tls_get_addr->elf
- || h == &htab->tls_get_addr_fd->elf)
+ h->needs_plt = 1;
+ if (h->root.root.string[0] == '.'
+ && h->root.root.string[1] != '\0')
+ ((struct ppc_link_hash_entry *) h)->is_func = 1;
+ if (h == tga || h == dottga)
sec->has_tls_reloc = 1;
- else if (htab->tls_get_addr == NULL
- && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
- && (h->root.root.string[15] == 0
- || h->root.root.string[15] == '@'))
- {
- htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
- sec->has_tls_reloc = 1;
- }
- else if (htab->tls_get_addr_fd == NULL
- && !strncmp (h->root.root.string, "__tls_get_addr", 14)
- && (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;
- }
}
break;
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)
{
+ bfd_size_type amt;
+
/* One extra to simplify get_tls_mask. */
- bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
- ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
- if (ppc64_elf_section_data (sec)->t_symndx == NULL)
+ amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
+ ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
+ if (ppc64_sec->u.toc.symndx == NULL)
+ return FALSE;
+ amt = sec->size * sizeof (bfd_vma) / 8;
+ ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
+ if (ppc64_sec->u.toc.add == 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.toc.symndx[rel->r_offset / 8] = r_symndx;
+ ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
/* 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.toc.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.toc.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;
{
if (h->root.root.string[0] == '.'
&& h->root.root.string[1] != 0
- && get_fdh ((struct ppc_link_hash_entry *) h, htab))
+ && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
;
else
((struct ppc_link_hash_entry *) h)->is_func = 1;
else
{
asection *s;
+ Elf_Internal_Sym *isym;
- s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
- r_symndx);
- if (s == NULL)
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
return FALSE;
- else if (s != sec)
+
+ s = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ if (s != NULL && s != sec)
opd_sym_map[rel->r_offset / 8] = s;
}
}
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
&& !info->shared
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
- || !h->def_regular)))
+ || !h->def_regular))
+ || (!info->shared
+ && ifunc != NULL))
{
struct ppc_dyn_relocs *p;
struct ppc_dyn_relocs **head;
this reloc. */
if (sreloc == NULL)
{
- const char *name;
- bfd *dynobj;
-
- name = (bfd_elf_string_from_elf_section
- (abfd,
- elf_elfheader (abfd)->e_shstrndx,
- elf_section_data (sec)->rel_hdr.sh_name));
- if (name == NULL)
- return FALSE;
-
- if (strncmp (name, ".rela", 5) != 0
- || strcmp (bfd_get_section_name (abfd, sec),
- name + 5) != 0)
- {
- (*_bfd_error_handler)
- (_("%B: bad relocation section name `%s\'"),
- abfd, name);
- bfd_set_error (bfd_error_bad_value);
- }
+ sreloc = _bfd_elf_make_dynamic_reloc_section
+ (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
- dynobj = htab->elf.dynobj;
- sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
- {
- flagword flags;
-
- flags = (SEC_HAS_CONTENTS | SEC_READONLY
- | 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_alignment (dynobj, sreloc, 3))
- return FALSE;
- }
- elf_section_data (sec)->sreloc = sreloc;
+ return FALSE;
}
/* If this is a global symbol, we count the number of
/* Track dynamic relocs needed for local syms too.
We really need local syms available to do this
easily. Oh well. */
-
asection *s;
- s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
- sec, r_symndx);
- if (s == NULL)
+ void *vpp;
+ Elf_Internal_Sym *isym;
+
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
return FALSE;
- head = ((struct ppc_dyn_relocs **)
- &elf_section_data (s)->local_dynrel);
+ s = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ if (s == NULL)
+ s = sec;
+
+ vpp = &elf_section_data (s)->local_dynrel;
+ head = (struct ppc_dyn_relocs **) vpp;
}
p = *head;
}
p->count += 1;
- if (!MUST_BE_DYN_RELOC (r_type))
+ if (!must_be_dyn_reloc (info, r_type))
p->pc_count += 1;
}
break;
/* 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;
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);
hi = look;
else
{
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
+ 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)
{
sym += symndx;
val = sym->st_value;
- sec = NULL;
- if ((sym->st_shndx != SHN_UNDEF
- && sym->st_shndx < SHN_LORESERVE)
- || sym->st_shndx > SHN_HIRESERVE)
- sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
+ sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
}
else
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);
+ rh = elf_follow_link (rh);
BFD_ASSERT (rh->root.type == bfd_link_hash_defined
|| rh->root.type == bfd_link_hash_defweak);
val = rh->root.u.def.value;
return val;
}
-/* Return the section that should be marked against GC for a given
- relocation. */
+/* If FDH is a function descriptor symbol, return the associated code
+ entry symbol if it is defined. Return NULL otherwise. */
-static asection *
-ppc64_elf_gc_mark_hook (asection *sec,
- struct bfd_link_info *info,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
+static struct ppc_link_hash_entry *
+defined_code_entry (struct ppc_link_hash_entry *fdh)
{
- asection *rsec;
-
- /* First mark all our entry sym sections. */
- if (info->gc_sym_list != NULL)
+ if (fdh->is_func_descriptor)
{
- struct ppc_link_hash_table *htab = ppc_hash_table (info);
- struct bfd_sym_chain *sym = info->gc_sym_list;
+ struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
+ if (fh->elf.root.type == bfd_link_hash_defined
+ || fh->elf.root.type == bfd_link_hash_defweak)
+ return fh;
+ }
+ return NULL;
+}
- info->gc_sym_list = NULL;
- do
- {
- struct ppc_link_hash_entry *eh;
+/* If FH is a function code entry symbol, return the associated
+ function descriptor symbol if it is defined. Return NULL otherwise. */
- 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;
+static struct ppc_link_hash_entry *
+defined_func_desc (struct ppc_link_hash_entry *fh)
+{
+ if (fh->oh != NULL
+ && fh->oh->is_func_descriptor)
+ {
+ struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
+ if (fdh->elf.root.type == bfd_link_hash_defined
+ || fdh->elf.root.type == bfd_link_hash_defweak)
+ return fdh;
+ }
+ return NULL;
+}
- if (eh->is_func_descriptor
- && (eh->oh->elf.root.type == bfd_link_hash_defined
- || eh->oh->elf.root.type == bfd_link_hash_defweak))
- 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)
- ;
- else
- continue;
+/* 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;
- if (!rsec->gc_mark)
- _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
+ for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
+ {
+ struct ppc_link_hash_entry *eh, *fh;
+ asection *sec;
- rsec = eh->elf.root.u.def.section;
- if (!rsec->gc_mark)
- _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
+ eh = (struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
+ if (eh == NULL)
+ continue;
+ if (eh->elf.root.type != bfd_link_hash_defined
+ && eh->elf.root.type != bfd_link_hash_defweak)
+ continue;
- sym = sym->next;
+ fh = defined_code_entry (eh);
+ if (fh != NULL)
+ {
+ sec = fh->elf.root.u.def.section;
+ sec->flags |= SEC_KEEP;
}
- while (sym != NULL);
+ 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;
}
+}
- /* Syms return NULL if we're marking .opd, so we avoid marking all
- function sections, as all functions are referenced in .opd. */
+/* 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;
+ struct ppc_link_hash_entry *fdh;
+
+ 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. */
+ fdh = defined_func_desc (eh);
+ if (fdh != NULL)
+ eh = fdh;
+
+ 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;
+ struct ppc_link_hash_entry *fh;
+
+ eh->elf.root.u.def.section->flags |= SEC_KEEP;
+
+ /* Function descriptor syms cause the associated
+ function code sym section to be marked. */
+ fh = defined_code_entry (eh);
+ if (fh != NULL)
+ {
+ code_sec = fh->elf.root.u.def.section;
+ code_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,
+ &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 (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;
+
+ /* 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 *eh;
+ struct ppc_link_hash_entry *eh, *fh, *fdh;
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
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;
+ fdh = defined_func_desc (eh);
+ if (fdh != NULL)
+ eh = fdh;
/* 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))
+ fh = defined_code_entry (eh);
+ if (fh != NULL)
{
/* They also mark their opd section. */
- if (!eh->elf.root.u.def.section->gc_mark)
- _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
- ppc64_elf_gc_mark_hook);
+ eh->elf.root.u.def.section->gc_mark = 1;
- rsec = eh->oh->elf.root.u.def.section;
+ rsec = fh->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)
- {
- if (!eh->elf.root.u.def.section->gc_mark)
- _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
- ppc64_elf_gc_mark_hook);
- }
+ 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 = get_opd_info (rsec);
- if (opd_sym_section != NULL)
+ opd = get_opd_info (rsec);
+ if (opd != NULL && opd->func_sec != NULL)
{
- if (!rsec->gc_mark)
- _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
+ rsec->gc_mark = 1;
- rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
+ rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
}
}
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);
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;
+ h = elf_follow_link (h);
eh = (struct ppc_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
}
}
+ if (is_branch_reloc (r_type))
+ {
+ struct plt_entry **ifunc = NULL;
+ if (h != NULL)
+ {
+ if (h->type == STT_GNU_IFUNC)
+ ifunc = &h->plt.plist;
+ }
+ else if (local_got_ents != NULL)
+ {
+ struct plt_entry **local_plt = (struct plt_entry **)
+ (local_got_ents + symtab_hdr->sh_info);
+ char *local_got_tls_masks = (char *)
+ (local_plt + symtab_hdr->sh_info);
+ if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
+ ifunc = local_plt + r_symndx;
+ }
+ if (ifunc != NULL)
+ {
+ struct plt_entry *ent;
+
+ for (ent = *ifunc; 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;
+ continue;
+ }
+ }
+
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:
- ppc64_tlsld_got (abfd)->refcount -= 1;
tls_type = TLS_TLS | TLS_LD;
goto dogot;
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)
+ if (ent != NULL && ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
break;
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,
+ && (fdh = defined_func_desc (fh)) != NULL
+ && get_opd_info (fdh->elf.root.u.def.section) != NULL
+ && opd_entry_value (fdh->elf.root.u.def.section,
+ fdh->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.root.type = fdh->elf.root.type;
fh->elf.forced_local = 1;
+ fh->elf.def_regular = fdh->elf.def_regular;
+ fh->elf.def_dynamic = fdh->elf.def_dynamic;
}
/* If this is a function code symbol, transfer dynamic linking
/* 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;
-
+ fdh = lookup_fdh (fh, htab);
if (fdh == NULL
- && info->shared
+ && !info->executable
&& (fh->elf.root.type == bfd_link_hash_undefined
|| fh->elf.root.type == bfd_link_hash_undefweak))
{
if (fdh != NULL
&& !fdh->elf.forced_local
- && (info->shared
+ && (!info->executable
|| fdh->elf.def_dynamic
|| fdh->elf.ref_dynamic
|| (fdh->elf.root.type == bfd_link_hash_undefweak
{
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->type == STT_GNU_IFUNC
|| h->needs_plt)
{
/* Clear procedure linkage table information for any symbol that
if (ent->plt.refcount > 0)
break;
if (ent == NULL
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
+ || (h->type != STT_GNU_IFUNC
+ && (SYMBOL_CALLS_LOCAL (info, h)
+ || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak))))
{
h->plt.plist = NULL;
h->needs_plt = 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)
{
struct ppc_link_hash_entry * eh;
/* 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
h->needs_copy = 1;
}
- /* 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->dynbss;
- s->size = BFD_ALIGN (s->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;
- }
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->size;
-
- /* Increment the section size to make room for the symbol. */
- s->size += h->size;
-
- return TRUE;
+ return _bfd_elf_adjust_dynamic_copy (h, s);
}
/* If given a function descriptor symbol, hide both the function code
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)
{
struct elf_link_hash_entry *h;
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;
+ h = elf_follow_link (h);
if (hp != NULL)
*hp = h;
*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)
{
lgot_ents = elf_local_got_ents (ibfd);
if (lgot_ents != NULL)
{
- char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
+ struct plt_entry **local_plt = (struct plt_entry **)
+ (lgot_ents + symtab_hdr->sh_info);
+ char *lgot_masks = (char *)
+ (local_plt + symtab_hdr->sh_info);
tls_mask = &lgot_masks[r_symndx];
}
*tls_maskp = tls_mask;
type suitable for optimization, and 1 otherwise. */
static int
-get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
+get_tls_mask (char **tls_maskp,
+ unsigned long *toc_symndx,
+ bfd_vma *toc_addend,
Elf_Internal_Sym **locsymsp,
- const Elf_Internal_Rela *rel, bfd *ibfd)
+ const Elf_Internal_Rela *rel,
+ bfd *ibfd)
{
unsigned long r_symndx;
int next_r;
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];
- if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
- return 0;
+ r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
+ next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
if (toc_symndx != NULL)
*toc_symndx = r_symndx;
+ if (toc_addend != NULL)
+ *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
+ 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)
{
struct ppc_link_hash_entry *eh;
asection *sym_sec;
- long *opd_adjust;
+ struct _opd_sec_data *opd;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
return TRUE;
sym_sec = eh->elf.root.u.def.section;
- opd_adjust = get_opd_info (sym_sec);
- if (opd_adjust != NULL)
+ opd = get_opd_info (sym_sec);
+ if (opd != NULL && opd->adjust != NULL)
{
- long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
+ 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)->u.deleted_section;
+ 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)->u.deleted_section = dsec;
+ ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
break;
}
}
}
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
if (h != NULL)
pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
- else if (sym_sec != NULL)
- pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
else
- pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
+ {
+ 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 (r_type))
+ if (!must_be_dyn_reloc (info, r_type))
p->pc_count -= 1;
p->count -= 1;
if (p->count == 0)
bfd_boolean
ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
- bfd_boolean no_opd_opt,
bfd_boolean non_overlapping)
{
bfd *ibfd;
Elf_Internal_Sym *local_syms;
struct elf_link_hash_entry **sym_hashes;
bfd_vma offset;
- bfd_size_type amt;
- long *opd_adjust;
+ struct _opd_sec_data *opd;
bfd_boolean need_edit, add_aux_fields;
bfd_size_type cnt_16b = 0;
if (sec == NULL || sec->size == 0)
continue;
- amt = sec->size * sizeof (long) / 8;
- opd_adjust = get_opd_info (sec);
- if (opd_adjust == NULL)
- {
- /* check_relocs hasn't been called. Must be a ld -r link
- or --just-symbols object. */
- opd_adjust = bfd_alloc (obfd, amt);
- if (opd_adjust == NULL)
- return FALSE;
- ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
- }
- memset (opd_adjust, 0, amt);
-
- if (no_opd_opt)
- continue;
-
if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
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. */
{
Elf_Internal_Rela *write_rel;
bfd_byte *rptr, *wptr;
- bfd_byte *new_contents = NULL;
+ bfd_byte *new_contents;
bfd_boolean skip;
long opd_ent_size;
+ bfd_size_type amt;
+
+ new_contents = NULL;
+ 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
if (h != NULL
&& h->root.root.string[0] == '.')
{
- fdh = get_fdh ((struct ppc_link_hash_entry *) h,
- ppc_hash_table (info));
+ fdh = lookup_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->elf.root.u.def.value = 0;
fdh->elf.root.u.def.section = sym_sec;
}
- opd_adjust[rel->r_offset / 8] = -1;
+ opd->adjust[rel->r_offset / 8] = -1;
}
else
{
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]
+ opd->adjust[rel->r_offset / 8]
= (wptr - new_contents) - (rptr - sec->contents);
if (wptr != rptr)
if (skip)
{
- if (!dec_dynrel_count (rel->r_info, sec, info,
- NULL, h, sym_sec))
+ if (!NO_OPD_RELOCS
+ && !info->relocatable
+ && !dec_dynrel_count (rel->r_info, sec, info,
+ NULL, h, sym_sec))
goto error_ret;
}
else
/* 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];
+ rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
if (write_rel != rel)
memcpy (write_rel, rel, sizeof (*rel));
++write_rel;
sec->contents = new_contents;
}
- /* Fudge the size too, as this is used later in
+ /* 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;
/* 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)
+ppc64_elf_tls_setup (bfd *obfd,
+ struct bfd_link_info *info,
+ int no_tls_get_addr_opt)
{
struct ppc_link_hash_table *htab;
htab = ppc_hash_table (info);
+ htab->tls_get_addr = ((struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
+ FALSE, FALSE, TRUE));
+ /* Move dynamic linking info to the function descriptor sym. */
if (htab->tls_get_addr != NULL)
+ func_desc_adjust (&htab->tls_get_addr->elf, info);
+ htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
+ elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
+ FALSE, FALSE, TRUE));
+ if (!no_tls_get_addr_opt)
{
- struct ppc_link_hash_entry *h = htab->tls_get_addr;
+ struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
+
+ opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
+ FALSE, FALSE, TRUE);
+ if (opt != NULL)
+ func_desc_adjust (opt, info);
+ opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
+ FALSE, FALSE, TRUE);
+ if (opt_fd != NULL
+ && (opt_fd->root.type == bfd_link_hash_defined
+ || opt_fd->root.type == bfd_link_hash_defweak))
+ {
+ /* If glibc supports an optimized __tls_get_addr call stub,
+ signalled by the presence of __tls_get_addr_opt, and we'll
+ be calling __tls_get_addr via a plt call stub, then
+ make __tls_get_addr point to __tls_get_addr_opt. */
+ tga_fd = &htab->tls_get_addr_fd->elf;
+ if (htab->elf.dynamic_sections_created
+ && tga_fd != NULL
+ && (tga_fd->type == STT_FUNC
+ || tga_fd->needs_plt)
+ && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
+ || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
+ && tga_fd->root.type == bfd_link_hash_undefweak)))
+ {
+ struct plt_entry *ent;
- 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;
+ for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->plt.refcount > 0)
+ break;
+ if (ent != NULL)
+ {
+ tga_fd->root.type = bfd_link_hash_indirect;
+ tga_fd->root.u.i.link = &opt_fd->root;
+ ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
+ if (opt_fd->dynindx != -1)
+ {
+ /* Use __tls_get_addr_opt in dynamic relocations. */
+ opt_fd->dynindx = -1;
+ _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
+ opt_fd->dynstr_index);
+ if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
+ return FALSE;
+ }
+ htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
+ tga = &htab->tls_get_addr->elf;
+ if (opt != NULL && tga != NULL)
+ {
+ tga->root.type = bfd_link_hash_indirect;
+ tga->root.u.i.link = &opt->root;
+ ppc64_elf_copy_indirect_symbol (info, opt, tga);
+ _bfd_elf_link_hash_hide_symbol (info, opt,
+ tga->forced_local);
+ htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
+ }
+ htab->tls_get_addr_fd->oh = htab->tls_get_addr;
+ htab->tls_get_addr_fd->is_func_descriptor = 1;
+ if (htab->tls_get_addr != NULL)
+ {
+ htab->tls_get_addr->oh = htab->tls_get_addr_fd;
+ htab->tls_get_addr->is_func = 1;
+ }
+ }
+ }
+ }
+ else
+ no_tls_get_addr_opt = TRUE;
+ }
+ htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
+ return _bfd_elf_tls_setup (obfd, info);
+}
- htab->tls_get_addr = h;
+/* Return TRUE iff REL is a branch reloc with a global symbol matching
+ HASH1 or HASH2. */
- 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;
- }
+static bfd_boolean
+branch_reloc_hash_match (const bfd *ibfd,
+ const Elf_Internal_Rela *rel,
+ const struct ppc_link_hash_entry *hash1,
+ const struct ppc_link_hash_entry *hash2)
+{
+ Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
+ enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
+ unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
- if (htab->tls_get_addr_fd != NULL)
+ if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
{
- 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;
+ struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
+ struct elf_link_hash_entry *h;
- htab->tls_get_addr_fd = h;
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ h = elf_follow_link (h);
+ if (h == &hash1->elf || h == &hash2->elf)
+ return TRUE;
}
-
- return _bfd_elf_tls_setup (obfd, info);
+ return FALSE;
}
/* Run through all the TLS relocs looking for optimization
bfd *ibfd;
asection *sec;
struct ppc_link_hash_table *htab;
+ int pass;
- if (info->relocatable || info->shared)
+ 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;
- 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, NULL, NULL,
+ info->keep_memory);
+ if (relstart == NULL)
+ return FALSE;
- /* 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;
- expecting_tls_get_addr = 0;
- 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;
+ 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;
+ }
- 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 (locsyms != NULL
- && (elf_tdata (ibfd)->symtab_hdr.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);
+ }
- 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;
- 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:
- /* These relocs should never be against a symbol
- defined in a shared lib. Leave them alone if
- that turns out to be the case. */
- ppc64_tlsld_got (ibfd)->refcount -= 1;
- if (!is_local)
+ /* 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;
- /* LD -> LE */
- tls_set = 0;
- tls_clear = TLS_LD;
- tls_type = TLS_TLS | TLS_LD;
- expecting_tls_get_addr = 1;
- break;
+ case R_PPC64_TOC16:
+ case R_PPC64_TOC16_LO:
+ case R_PPC64_TLS:
+ case R_PPC64_TLSGD:
+ case R_PPC64_TLSLD:
+ 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
+ || r_type == R_PPC64_TLSGD
+ || r_type == R_PPC64_TLSLD)
+ {
+ toc_ref[toc_ref_index] = 1;
+ continue;
+ }
+
+ if (pass != 0 && toc_ref[toc_ref_index] == 0)
+ continue;
- 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;
+ tls_clear = 0;
+ expecting_tls_get_addr = 2;
+ 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:
- 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
+ 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_REL14:
- case R_PPC64_REL14_BRTAKEN:
- case R_PPC64_REL14_BRNTAKEN:
- case R_PPC64_REL24:
- if (h != NULL
- && (h == &htab->tls_get_addr->elf
- || h == &htab->tls_get_addr_fd->elf))
- {
- 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, NULL, &locsyms,
- rel - 1, ibfd);
- if (retval == 0)
- goto err_free_rel;
- if (toc_tls != NULL)
- expecting_tls_get_addr = retval > 1;
- }
+ 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;
- 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;
+ /* LD -> LE */
+ tls_set = TLS_EXPLICIT;
+ tls_clear = TLS_LD;
+ }
+ break;
- case R_PPC64_TPREL64:
- expecting_tls_get_addr = 0;
- if (ok_tprel)
- {
- /* IE -> LE */
- tls_set = TLS_EXPLICIT;
- tls_clear = TLS_TPREL;
- break;
- }
- else
+ 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)
+ if (pass == 0)
+ {
+ if (!expecting_tls_get_addr
+ || !sec->has_tls_get_addr_call)
+ continue;
+
+ if (rel + 1 < relend
+ && branch_reloc_hash_match (ibfd, rel + 1,
+ htab->tls_get_addr,
+ htab->tls_get_addr_fd))
+ {
+ if (expecting_tls_get_addr == 2)
+ {
+ /* Check for toc tls entries. */
+ char *toc_tls;
+ int retval;
+
+ retval = get_tls_mask (&toc_tls, NULL, NULL,
+ &locsyms,
+ rel, ibfd);
+ if (retval == 0)
+ goto err_free_rel;
+ if (retval > 1 && toc_tls != NULL)
+ toc_ref[toc_ref_index] = 1;
+ }
continue;
+ }
- /* LD -> LE */
- tls_set = TLS_EXPLICIT;
- tls_clear = TLS_LD;
- }
- break;
+ if (expecting_tls_get_addr != 1)
+ continue;
- default:
- expecting_tls_get_addr = 0;
- 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 ((tls_set & TLS_EXPLICIT) == 0)
- {
- struct got_entry *ent;
+ 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;
+ }
+ }
- /* Adjust got entry for this reloc. */
- if (h != NULL)
- ent = h->got.glist;
- else
- ent = elf_local_got_ents (ibfd)[r_symndx];
+ 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;
+ }
+ }
- 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_clear == 0)
+ continue;
- 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) == 0)
+ {
+ struct got_entry *ent;
- if (tls_set == (TLS_EXPLICIT | TLS_GD))
- {
- if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
- NULL, h, sym_sec))
- return FALSE;
- }
- }
+ /* Adjust got entry for this reloc. */
+ if (h != NULL)
+ ent = h->got.glist;
+ else
+ ent = elf_local_got_ents (ibfd)[r_symndx];
- *tls_mask |= tls_set;
- *tls_mask &= ~tls_clear;
- }
+ 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 (elf_section_data (sec)->relocs != relstart)
- free (relstart);
- }
+ 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_tdata (ibfd)->symtab_hdr.contents
- != (unsigned char *) locsyms))
+ && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
{
if (!info->keep_memory)
free (locsyms);
else
- elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
+ elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
}
}
return TRUE;
continue;
local_syms = NULL;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (ibfd);
sym_hashes = elf_sym_hashes (ibfd);
/* Look at sections dropped from the final link. */
return FALSE;
}
- /* Now check all kept sections that might reference the toc. */
- for (sec = ibfd->sections;
+ /* 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;
- /* Check the toc itself last. */
sec = (sec == toc ? NULL
- : sec->next == toc && sec->next->next ? sec->next->next
: sec->next == NULL ? toc
+ : sec->next == toc && toc->next ? toc->next
: sec->next))
{
int repeat;
for (sym = local_syms;
sym < local_syms + symtab_hdr->sh_info;
++sym)
- if (sym->st_shndx != SHN_UNDEF
- && (sym->st_shndx < SHN_LORESERVE
- || sym->st_shndx > SHN_HIRESERVE)
- && sym->st_value != 0
+ if (sym->st_value != 0
&& bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
{
if (skip[sym->st_value >> 3] != (unsigned long) -1)
info = (struct bfd_link_info *) inf;
htab = ppc_hash_table (info);
- if (htab->elf.dynamic_sections_created
- && h->dynindx != -1
- && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
+ if ((htab->elf.dynamic_sections_created
+ && h->dynindx != -1
+ && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
+ || h->type == STT_GNU_IFUNC)
{
struct plt_entry *pent;
bfd_boolean doneone = FALSE;
for (pent = h->plt.plist; pent != NULL; pent = pent->next)
if (pent->plt.refcount > 0)
{
- /* If this is the first .plt entry, make room for the special
- first entry. */
- s = htab->plt;
- if (s->size == 0)
- s->size += PLT_INITIAL_ENTRY_SIZE;
-
- pent->plt.offset = s->size;
-
- /* Make room for this entry. */
- s->size += PLT_ENTRY_SIZE;
-
- /* Make room for the .glink code. */
- s = htab->glink;
- if (s->size == 0)
- s->size += GLINK_CALL_STUB_SIZE;
- /* We need bigger stubs past index 32767. */
- 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->relplt;
+ if (!htab->elf.dynamic_sections_created
+ || h->dynindx == -1)
+ {
+ s = htab->iplt;
+ pent->plt.offset = s->size;
+ s->size += PLT_ENTRY_SIZE;
+ s = htab->reliplt;
+ }
+ else
+ {
+ /* If this is the first .plt entry, make room for the special
+ first entry. */
+ s = htab->plt;
+ if (s->size == 0)
+ s->size += PLT_INITIAL_ENTRY_SIZE;
+
+ pent->plt.offset = s->size;
+
+ /* Make room for this entry. */
+ s->size += PLT_ENTRY_SIZE;
+
+ /* Make room for the .glink code. */
+ s = htab->glink;
+ if (s->size == 0)
+ s->size += GLINK_CALL_STUB_SIZE;
+ /* We need bigger stubs past index 32767. */
+ 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->relplt;
+ }
s->size += sizeof (Elf64_External_Rela);
doneone = TRUE;
}
if (gent->got.refcount > 0)
{
bfd_boolean dyn;
+ asection *rsec;
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic,
nor will all TLS symbols. */
if (h->dynindx == -1
- && !h->forced_local)
+ && !h->forced_local
+ && h->type != STT_GNU_IFUNC
+ && htab->elf.dynamic_sections_created)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
if ((gent->tls_type & TLS_LD) != 0
&& !h->def_dynamic)
{
- gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
+ ppc64_tlsld_got (gent->owner)->refcount += 1;
+ gent->got.offset = (bfd_vma) -1;
continue;
}
+ 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;
+ rsec = NULL;
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))
- ppc64_elf_tdata (gent->owner)->relgot->size
- += (gent->tls_type & eh->tls_mask & TLS_GD
- ? 2 * sizeof (Elf64_External_Rela)
- : sizeof (Elf64_External_Rela));
+ rsec = ppc64_elf_tdata (gent->owner)->relgot;
+ else if (h->type == STT_GNU_IFUNC)
+ rsec = htab->reliplt;
+ if (rsec != NULL)
+ rsec->size += (gent->tls_type & eh->tls_mask & TLS_GD
+ ? 2 * sizeof (Elf64_External_Rela)
+ : sizeof (Elf64_External_Rela));
}
else
gent->got.offset = (bfd_vma) -1;
- if (eh->dyn_relocs == NULL)
+ if (eh->dyn_relocs == NULL
+ || (!htab->elf.dynamic_sections_created
+ && h->type != STT_GNU_IFUNC))
return TRUE;
/* In the shared -Bsymbolic case, discard space allocated for
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)
+ {
+ 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 (h->type == STT_GNU_IFUNC)
+ {
+ if (!h->non_got_ref)
eh->dyn_relocs = NULL;
}
else if (ELIMINATE_COPY_RELOCS)
dynamic. */
if (!h->non_got_ref
- && h->def_dynamic
&& !h->def_regular)
{
/* Make sure this symbol is output as a dynamic symbol.
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
+ if (!htab->elf.dynamic_sections_created)
+ sreloc = htab->reliplt;
sreloc->size += p->count * sizeof (Elf64_External_Rela);
}
{
struct got_entry **lgot_ents;
struct got_entry **end_lgot_ents;
+ struct plt_entry **local_plt;
+ struct plt_entry **end_local_plt;
char *lgot_masks;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
- if (!is_ppc64_elf_target (ibfd->xvec))
+ 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)
- {
- srel = ppc64_elf_tdata (ibfd)->relgot;
- srel->size += sizeof (Elf64_External_Rela);
- }
- }
- else
- ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
-
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;
+ if (!htab->elf.dynamic_sections_created)
+ srel = htab->reliplt;
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;
+ local_plt = (struct plt_entry **) end_lgot_ents;
+ end_local_plt = local_plt + locsymcount;
+ lgot_masks = (char *) end_local_plt;
s = ppc64_elf_tdata (ibfd)->got;
srel = ppc64_elf_tdata (ibfd)->relgot;
for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
{
if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
{
- if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
- {
- ppc64_tlsld_got (ibfd)->offset = s->size;
- s->size += 16;
- if (info->shared)
- srel->size += sizeof (Elf64_External_Rela);
- }
- ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
+ ppc64_tlsld_got (ibfd)->refcount += 1;
+ ent->got.offset = (bfd_vma) -1;
}
else
{
+ unsigned int num = 1;
ent->got.offset = s->size;
if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
- {
- s->size += 16;
- if (info->shared)
- srel->size += 2 * sizeof (Elf64_External_Rela);
- }
- else
- {
- s->size += 8;
- if (info->shared)
- srel->size += sizeof (Elf64_External_Rela);
- }
+ num = 2;
+ s->size += num * 8;
+ if (info->shared)
+ srel->size += num * sizeof (Elf64_External_Rela);
+ else if ((*lgot_masks & PLT_IFUNC) != 0)
+ htab->reliplt->size += num * sizeof (Elf64_External_Rela);
}
}
else
ent->got.offset = (bfd_vma) -1;
}
+
+ /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
+ for (; local_plt < end_local_plt; ++local_plt)
+ {
+ struct plt_entry *ent;
+
+ for (ent = *local_plt; ent != NULL; ent = ent->next)
+ if (ent->plt.refcount > 0)
+ {
+ s = htab->iplt;
+ ent->plt.offset = s->size;
+ s->size += PLT_ENTRY_SIZE;
+
+ htab->reliplt->size += sizeof (Elf64_External_Rela);
+ }
+ else
+ ent->plt.offset = (bfd_vma) -1;
+ }
}
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
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. */
relocs = FALSE;
continue;
else if (s == htab->got
|| s == htab->plt
- || s == htab->glink)
+ || s == htab->iplt
+ || 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->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->relplt)
relocs = TRUE;
if (s->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. */
s->flags |= SEC_EXCLUDE;
continue;
}
- /* .plt is in the bss section. We don't initialise it. */
- if (s == htab->plt)
+ if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
/* Allocate memory for the section contents. We use bfd_zalloc
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
- if (!is_ppc64_elf_target (ibfd->xvec))
+ if (!is_ppc64_elf (ibfd))
continue;
s = ppc64_elf_tdata (ibfd)->got;
return FALSE;
}
+ if (!htab->no_tls_get_addr_opt
+ && htab->tls_get_addr_fd != NULL
+ && htab->tls_get_addr_fd->elf.plt.plist != NULL
+ && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
+ return FALSE;
+
if (relocs)
{
if (!add_dynamic_entry (DT_RELA, 0)
ppc_type_of_stub (asection *input_sec,
const Elf_Internal_Rela *rel,
struct ppc_link_hash_entry **hash,
+ struct plt_entry **plt_ent,
bfd_vma destination)
{
struct ppc_link_hash_entry *h = *hash;
if (h != NULL)
{
+ struct plt_entry *ent;
+ struct ppc_link_hash_entry *fdh = h;
if (h->oh != NULL
&& h->oh->is_func_descriptor)
- h = h->oh;
+ fdh = ppc_follow_link (h->oh);
- if (h->elf.dynindx != -1)
+ for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
+ if (ent->addend == rel->r_addend
+ && ent->plt.offset != (bfd_vma) -1)
+ {
+ *hash = fdh;
+ *plt_ent = ent;
+ return ppc_stub_plt_call;
+ }
+
+ /* 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;
+ }
+ else if (elf_local_got_ents (input_sec->owner) != NULL)
+ {
+ Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
+ struct plt_entry **local_plt = (struct plt_entry **)
+ elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
+ unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
+
+ if (local_plt[r_symndx] != NULL)
{
struct plt_entry *ent;
- for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
+ for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
&& ent->plt.offset != (bfd_vma) -1)
{
- *hash = h;
+ *plt_ent = ent;
return ppc_stub_plt_call;
}
}
-
- if (!(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 where the call point is. */
/* Build a .plt call stub. */
static inline bfd_byte *
-build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
+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;
+}
+
+/* Build a special .plt call stub for __tls_get_addr. */
+
+#define LD_R11_0R3 0xe9630000
+#define LD_R12_0R3 0xe9830000
+#define MR_R0_R3 0x7c601b78
+#define CMPDI_R11_0 0x2c2b0000
+#define ADD_R3_R12_R13 0x7c6c6a14
+#define BEQLR 0x4d820020
+#define MR_R3_R0 0x7c030378
+#define MFLR_R11 0x7d6802a6
+#define STD_R11_0R1 0xf9610000
+#define BCTRL 0x4e800421
+#define LD_R11_0R1 0xe9610000
+#define LD_R2_0R1 0xe8410000
+#define MTLR_R11 0x7d6803a6
+
+static inline bfd_byte *
+build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
+ Elf_Internal_Rela *r)
+{
+ bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
+ bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
+ bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
+ bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
+ bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
+ bfd_put_32 (obfd, BEQLR, p), p += 4;
+ bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
+ bfd_put_32 (obfd, MFLR_R11, p), p += 4;
+ bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
+
+ if (r != NULL)
+ r[0].r_offset += 9 * 4;
+ p = build_plt_stub (obfd, p, offset, r);
+ bfd_put_32 (obfd, BCTRL, p - 4);
+
+ bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
+ bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
+ bfd_put_32 (obfd, MTLR_R11, p), p += 4;
+ bfd_put_32 (obfd, BLR, 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 (struct bfd_hash_entry *gen_entry, void *in_arg)
{
struct ppc_link_hash_table *htab;
bfd_byte *loc;
bfd_byte *p;
- unsigned int indx;
- struct plt_entry *ent;
bfd_vma dest, off;
int size;
+ Elf_Internal_Rela *r;
+ asection *plt;
/* Massage our args to the form they really have. */
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
+ 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;
- htab->stub_group[stub_entry->id_sec->id].toc_off);
bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
loc += 4;
- bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
- loc += 4;
+ 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);
- BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
+ 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;
+ }
if (info->emitrelocations)
{
- Elf_Internal_Rela *relocs, *r;
- struct bfd_elf_section_data *elfsec_data;
-
- elfsec_data = elf_section_data (stub_entry->stub_sec);
- relocs = elfsec_data->relocs;
- if (relocs == NULL)
- {
- bfd_size_type relsize;
- relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
- relocs = bfd_alloc (htab->stub_bfd, relsize);
- if (relocs == NULL)
- return FALSE;
- elfsec_data->relocs = relocs;
- elfsec_data->rel_hdr.sh_size = relsize;
- elfsec_data->rel_hdr.sh_entsize = 24;
- stub_entry->stub_sec->reloc_count = 0;
- }
- r = relocs + stub_entry->stub_sec->reloc_count;
- stub_entry->stub_sec->reloc_count += 1;
+ 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;
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;
+ h = ppc_follow_link (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;
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->brlt->owner, off,
+ bfd_put_64 (htab->brlt->owner, dest,
htab->brlt->contents + br_entry->offset);
- if (htab->relbrlt != NULL)
+ 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->brlt->output_offset
- + htab->brlt->output_section->vma);
- rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
- rela.r_addend = off;
+ br_entry->iter = 0;
- rl = htab->relbrlt->contents;
- rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (htab->relbrlt->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->brlt->output_offset
- + htab->brlt->output_section->vma
+ 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);
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 (bfd_big_endian (info->output_bfd))
+ r[0].r_offset += 2;
+ 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 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
- loc += 4;
- bfd_put_32 (htab->stub_bfd, 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
{
- htab->stub_group[stub_entry->id_sec->id].toc_off);
bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
loc += 4;
- bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
- loc += 4;
- bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
- loc += 4;
- bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
- loc += 4;
+ 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);
- size = 28;
}
loc += 4;
bfd_put_32 (htab->stub_bfd, MTCTR_R11, 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 != 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. 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;
+ if (stub_entry->h != NULL
+ && stub_entry->h->is_func_descriptor
+ && stub_entry->h->oh != NULL)
+ {
+ struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
+
+ /* If the old-ABI "dot-symbol" is undefined make it weak so
+ we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
+ FIXME: We used to define the symbol on one of the call
+ stubs instead, which is why we test symbol section id
+ against htab->top_id in various places. Likely all
+ these checks could now disappear. */
+ if (fh->elf.root.type == bfd_link_hash_undefined)
+ fh->elf.root.type = bfd_link_hash_undefweak;
}
/* Now build the stub. */
- off = (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;
- break;
- }
- if (off >= (bfd_vma) -2)
+ dest = stub_entry->plt_ent->plt.offset & ~1;
+ if (dest >= (bfd_vma) -2)
abort ();
- off &= ~ (bfd_vma) 1;
- 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);
+ plt = htab->plt;
+ if (!htab->elf.dynamic_sections_created
+ || stub_entry->h == NULL
+ || stub_entry->h->elf.dynindx == -1)
+ plt = htab->iplt;
+
+ dest += plt->output_offset + plt->output_section->vma;
+
+ if (stub_entry->h == NULL
+ && (stub_entry->plt_ent->plt.offset & 1) == 0)
+ {
+ Elf_Internal_Rela rela;
+ bfd_byte *rl;
+
+ rela.r_offset = dest;
+ rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
+ rela.r_addend = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
+
+ rl = (htab->reliplt->contents
+ + (htab->reliplt->reloc_count++
+ * sizeof (Elf64_External_Rela)));
+ bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
+ stub_entry->plt_ent->plt.offset |= 1;
+ }
+
+ off = (dest
+ - elf_gp (plt->output_section->owner)
+ - htab->stub_group[stub_entry->id_sec->id].toc_off);
if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
{
(*_bfd_error_handler)
(_("linkage table error against `%s'"),
- stub_entry->h->elf.root.root.string);
+ stub_entry->h != NULL
+ ? stub_entry->h->elf.root.root.string
+ : "<local sym>");
bfd_set_error (bfd_error_bad_value);
htab->stub_error = TRUE;
return FALSE;
}
- p = build_plt_stub (htab->stub_bfd, loc, 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;
+ if (bfd_big_endian (info->output_bfd))
+ r[0].r_offset += 2;
+ r[0].r_addend = dest;
+ }
+ if (stub_entry->h != NULL
+ && (stub_entry->h == htab->tls_get_addr_fd
+ || stub_entry->h == htab->tls_get_addr)
+ && !htab->no_tls_get_addr_opt)
+ p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
+ else
+ p = build_plt_stub (htab->stub_bfd, loc, off, r);
size = p - loc;
break;
if (stub_entry->stub_type == ppc_stub_plt_call)
{
- struct plt_entry *ent;
- off = (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 & ~(bfd_vma) 1;
- break;
- }
+ asection *plt;
+ off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
if (off >= (bfd_vma) -2)
abort ();
- off += (htab->plt->output_offset
- + htab->plt->output_section->vma
- - elf_gp (htab->plt->output_section->owner)
+ plt = htab->plt;
+ if (!htab->elf.dynamic_sections_created
+ || stub_entry->h == NULL
+ || stub_entry->h->elf.dynindx == -1)
+ plt = htab->iplt;
+ off += (plt->output_offset
+ + plt->output_section->vma
+ - elf_gp (plt->output_section->owner)
- htab->stub_group[stub_entry->id_sec->id].toc_off);
size = PLT_CALL_STUB_SIZE;
+ if (PPC_HA (off) == 0)
+ size -= 4;
if (PPC_HA (off + 16) != PPC_HA (off))
size += 4;
+ if (stub_entry->h != NULL
+ && (stub_entry->h == htab->tls_get_addr_fd
+ || stub_entry->h == htab->tls_get_addr)
+ && !htab->no_tls_get_addr_opt)
+ size += 13 * 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);
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 (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_type == ppc_stub_long_branch
- || stub_entry->stub_type == ppc_stub_long_branch_r2off))
- stub_entry->stub_sec->reloc_count += 1;
+ 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->size += size;
if (isec->output_section == NULL)
return 0;
- /* Hack for linux kernel. .fixup contains branches, but only back to
- the function that hit an exception. */
- if (strcmp (isec->name, ".fixup") == 0)
- return 0;
-
if (isec->reloc_count == 0)
return 0;
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
+ struct ppc_link_hash_entry *eh;
Elf_Internal_Sym *sym;
asection *sym_sec;
- long *opd_adjust;
+ struct _opd_sec_data *opd;
bfd_vma sym_value;
bfd_vma dest;
}
/* 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)
+ that uses r2. */
+ eh = (struct ppc_link_hash_entry *) h;
+ if (eh != NULL
+ && (eh->elf.plt.plist != NULL
+ || (eh->oh != NULL
+ && ppc_follow_link (eh->oh)->elf.plt.plist != 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;
+ ret = 1;
+ break;
}
+ if (sym_sec == NULL)
+ /* 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)
sym_value += rel->r_addend;
/* If this branch reloc uses an opd sym, find the code section. */
- opd_adjust = get_opd_info (sym_sec);
- if (opd_adjust != NULL)
+ opd = get_opd_info (sym_sec);
+ if (opd != NULL)
{
- if (h == NULL)
+ if (h == NULL && opd->adjust != NULL)
{
long adjust;
- adjust = opd_adjust[sym->st_value / 8];
+ adjust = opd->adjust[sym->st_value / 8];
if (adjust == -1)
/* Assume deleted functions won't ever be called. */
continue;
}
if (local_syms != NULL
- && (elf_tdata (isec->owner)->symtab_hdr.contents
- != (unsigned char *) local_syms))
+ && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
free (local_syms);
if (elf_section_data (isec)->relocs != relstart)
free (relstart);
/* 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). */
- if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
+ 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);
bfd_size_type stub_group_size,
bfd_boolean stubs_always_before_branch)
{
- asection **list = htab->input_list + htab->top_index;
+ 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
+ {
+ stub_group_size = 0x1c00000;
+ stub14_group_size = 0x7000;
+ }
+ suppress_size_errors = TRUE;
+ }
+
+ list = htab->input_list + htab->top_index;
do
{
asection *tail = *list;
curr = tail;
total = tail->size;
- big_sec = total >= stub_group_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)
- < stub_group_size)
+ < (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;
total = 0;
while (prev != NULL
&& ((total += tail->output_offset - prev->output_offset)
- < stub_group_size)
+ < (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;
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;
enum ppc_stub_type stub_type;
struct ppc_stub_hash_entry *stub_entry;
asection *sym_sec, *code_sec;
- bfd_vma sym_value;
+ bfd_vma sym_value, code_value;
bfd_vma destination;
bfd_boolean ok_dest;
struct ppc_link_hash_entry *hash;
Elf_Internal_Sym *sym;
char *stub_name;
const asection *id_sec;
- long *opd_adjust;
+ struct _opd_sec_data *opd;
+ struct plt_entry *plt_ent;
r_type = ELF64_R_TYPE (irela->r_info);
r_indx = ELF64_R_SYM (irela->r_info);
ok_dest = FALSE;
fdh = NULL;
+ sym_value = 0;
if (hash == NULL)
{
sym_value = sym->st_value;
ok_dest = TRUE;
}
- else
+ 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)
{
- sym_value = 0;
/* Recognise an old ABI func code entry sym, and
- use the func descriptor sym instead. */
+ use the func descriptor sym instead if it is
+ defined. */
if (hash->elf.root.root.string[0] == '.'
- && (fdh = get_fdh (hash, htab)) != NULL)
+ && (fdh = lookup_fdh (hash, htab)) != NULL)
{
if (fdh->elf.root.type == bfd_link_hash_defined
|| fdh->elf.root.type == bfd_link_hash_defweak)
else
fdh = NULL;
}
- 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)
- ;
- else if (hash->elf.root.type == bfd_link_hash_undefined)
- ;
- else
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_ret_free_internal;
- }
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
}
destination = 0;
}
code_sec = sym_sec;
- opd_adjust = get_opd_info (sym_sec);
- if (opd_adjust != NULL)
+ code_value = sym_value;
+ opd = get_opd_info (sym_sec);
+ if (opd != NULL)
{
bfd_vma dest;
- if (hash == NULL)
+ if (hash == NULL && opd->adjust != NULL)
{
- long adjust = opd_adjust[sym_value / 8];
+ long adjust = opd->adjust[sym_value / 8];
if (adjust == -1)
continue;
+ code_value += adjust;
sym_value += adjust;
}
dest = opd_entry_value (sym_sec, sym_value,
- &code_sec, &sym_value);
+ &code_sec, &code_value);
if (dest != (bfd_vma) -1)
{
destination = dest;
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;
+ hash->elf.root.u.def.value = code_value;
}
}
}
/* Determine what (if any) linker stub is needed. */
+ plt_ent = NULL;
stub_type = ppc_type_of_stub (section, irela, &hash,
- destination);
+ &plt_ent, destination);
if (stub_type != ppc_stub_plt_call)
{
/* Get tls info. */
char *tls_mask;
- if (!get_tls_mask (&tls_mask, NULL, &local_syms,
+ if (!get_tls_mask (&tls_mask, NULL, 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 = code_sec;
+ if (stub_type != ppc_stub_plt_call)
+ {
+ stub_entry->target_value = code_value;
+ stub_entry->target_section = code_sec;
+ }
+ else
+ {
+ stub_entry->target_value = sym_value;
+ stub_entry->target_section = sym_sec;
+ }
stub_entry->h = hash;
+ stub_entry->plt_ent = plt_ent;
stub_entry->addend = irela->r_addend;
if (stub_entry->h != NULL)
htab->stub_globals += 1;
-
- stub_changed = TRUE;
}
/* 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)
+ {
+ htab->glink->reloc_count = 1;
+ htab->glink->flags |= SEC_RELOC;
+ }
+
+ 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. */
/* The TOC consists of sections .got, .toc, .tocbss, .plt in that
order. The TOC starts where the first of these sections starts. */
s = bfd_get_section_by_name (obfd, ".got");
- if (s == NULL)
+ if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
s = bfd_get_section_by_name (obfd, ".toc");
- if (s == NULL)
+ if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
s = bfd_get_section_by_name (obfd, ".tocbss");
- if (s == NULL)
+ if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
s = bfd_get_section_by_name (obfd, ".plt");
- if (s == NULL)
+ if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
{
/* This may happen for
o references to TOC base (SYM@toc / TOC[tc0]) without a
/* Look for a likely section. We probably won't even be
using TOCstart. */
for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
+ if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
+ | SEC_EXCLUDE))
== (SEC_ALLOC | SEC_SMALL_DATA))
break;
if (s == NULL)
for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
+ if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
== (SEC_ALLOC | SEC_SMALL_DATA))
break;
if (s == NULL)
for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
+ if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
+ == SEC_ALLOC)
break;
if (s == NULL)
for (s = obfd->sections; s != NULL; s = s->next)
- if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
+ if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
break;
}
stub_sec->size = 0;
}
- if (htab->plt != NULL)
+ if (htab->glink != NULL && htab->glink->size != 0)
{
unsigned int indx;
bfd_vma plt0;
/* Build the .glink plt call stub. */
- plt0 = (htab->plt->output_section->vma
- + htab->plt->output_offset
- - (htab->glink->output_section->vma
- + htab->glink->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", TRUE, FALSE, FALSE);
+ 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 = 0;
+ h->root.u.def.value = 8;
h->ref_regular = 1;
h->def_regular = 1;
h->ref_regular_nonweak = 1;
h->non_elf = 0;
}
}
+ 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;
- bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
- p += 4;
- bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
- p += 4;
- bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
+ 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->glink->owner, SUB_R12_R12_R11, p);
+ bfd_put_32 (htab->glink->owner, BCL_20_31, p);
p += 4;
- bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
+ bfd_put_32 (htab->glink->owner, MFLR_R11, p);
p += 4;
- bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
+ bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
p += 4;
- bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
+ bfd_put_32 (htab->glink->owner, MTLR_R12, p);
p += 4;
- bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
+ bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
p += 4;
- bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
- p += 4;
- bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
- p += 4;
- bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
- p += 4;
- bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
+ bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
p += 4;
bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
p += 4;
p += 4;
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;
p += 4;
}
bfd_put_32 (htab->glink->owner,
- B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
+ B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
indx++;
p += 4;
}
/* 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)
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
to handle the relocations for a section.
bfd_boolean is_opd;
/* Disabled until we sort out how ld should choose 'y' vs 'at'. */
bfd_boolean is_power4 = FALSE;
-
- if (info->relocatable)
- 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])
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 ppc_link_hash_entry *fdh;
const char *sym_name;
unsigned long r_symndx, toc_symndx;
+ bfd_vma toc_addend;
char tls_mask, tls_gd, tls_type;
char sym_type;
bfd_vma relocation;
sym_name = NULL;
unresolved_reloc = FALSE;
warned = FALSE;
+ orig_addend = rel->r_addend;
if (r_symndx < symtab_hdr->sh_info)
{
/* It's a local symbol. */
- long *opd_adjust;
+ struct _opd_sec_data *opd;
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_adjust = get_opd_info (sec);
- if (opd_adjust != NULL)
+ opd = get_opd_info (sec);
+ if (opd != NULL && opd->adjust != NULL)
{
- long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
+ long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
if (adjust == -1)
relocation = 0;
else
- relocation += adjust;
+ {
+ /* 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
}
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
RELOCS so that --emit-relocs will output something sensible
tls_mask = 0;
tls_gd = 0;
toc_symndx = 0;
- if (IS_PPC64_TLS_RELOC (r_type))
+ if (h != NULL)
+ tls_mask = h->tls_mask;
+ else if (local_got_ents != NULL)
{
- if (h != NULL)
- 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;
+ struct plt_entry **local_plt = (struct plt_entry **)
+ (local_got_ents + symtab_hdr->sh_info);
+ char *lgot_masks = (char *)
+ (local_plt + symtab_hdr->sh_info);
+ tls_mask = lgot_masks[r_symndx];
+ }
+ if (tls_mask == 0
+ && (r_type == R_PPC64_TLS
+ || r_type == R_PPC64_TLSGD
+ || r_type == R_PPC64_TLSLD))
+ {
+ /* Check for toc tls entries. */
+ char *toc_tls;
- if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
- rel, input_bfd))
- return FALSE;
+ if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
+ &local_syms, rel, input_bfd))
+ return FALSE;
- if (toc_tls)
- tls_mask = *toc_tls;
- }
+ if (toc_tls)
+ tls_mask = *toc_tls;
}
/* Check that tls relocs are used with tls syms, and non-tls
&& (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))
+ && (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)
+ if (tls_mask != 0
+ && (r_type == R_PPC64_TLS
+ || r_type == R_PPC64_TLSGD
+ || r_type == R_PPC64_TLSLD))
/* R_PPC64_TLS is OK against a symbol in the TOC. */
;
else
(*_bfd_error_handler)
- (sym_type == STT_TLS
+ (!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,
char *toc_tls;
int retval;
- retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
- rel, input_bfd);
+ retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
+ &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;
}
}
}
&& (tls_mask & TLS_TPREL) == 0)
{
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;
if (toc_symndx != 0)
{
rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
+ rel->r_addend = toc_addend;
/* We changed the symbol. Start over in order to
get h, sym, sec etc. right. */
rel--;
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
- bfd_vma rtra;
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
- if ((insn & ((0x3f << 26) | (31 << 11)))
- == ((31 << 26) | (13 << 11)))
- rtra = insn & ((1 << 26) - (1 << 16));
- else if ((insn & ((0x3f << 26) | (31 << 16)))
- == ((31 << 26) | (13 << 16)))
- rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
- else
- abort ();
- if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
- /* add -> addi. */
- insn = 14 << 26;
- else if ((insn & (31 << 1)) == 23 << 1
- && ((insn & (31 << 6)) < 14 << 6
- || ((insn & (31 << 6)) >= 16 << 6
- && (insn & (31 << 6)) < 24 << 6)))
- /* load and store indexed -> dform. */
- insn = (32 | ((insn >> 6) & 31)) << 26;
- else if ((insn & (31 << 1)) == 21 << 1
- && (insn & (0x1a << 6)) == 0)
- /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
- insn = (((58 | ((insn >> 6) & 4)) << 26)
- | ((insn >> 6) & 1));
- else if ((insn & (31 << 1)) == 21 << 1
- && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
- /* lwax -> lwa. */
- insn = (58 << 26) | 2;
- else
+ insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
+ if (insn == 0)
abort ();
- insn |= rtra;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
/* 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);
+ rel->r_addend = toc_addend;
/* We changed the symbol. Start over in order to
get h, sym, sec etc. right. */
rel--;
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)
+ unsigned int insn1, insn2, insn3;
+ bfd_vma offset;
+
+ tls_ldgd_opt:
+ offset = (bfd_vma) -1;
+ /* If not using the newer R_PPC64_TLSGD/LD to mark
+ __tls_get_addr calls, we must trust that the call
+ stays with its arg setup insns, ie. that the next
+ reloc is the __tls_get_addr call associated with
+ the current reloc. Edit both insns. */
+ if (input_section->has_tls_get_addr_call
+ && rel + 1 < relend
+ && branch_reloc_hash_match (input_bfd, rel + 1,
+ htab->tls_get_addr,
+ htab->tls_get_addr_fd))
+ offset = rel[1].r_offset;
+ 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 = 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->elf
- && h2 != &htab->tls_get_addr_fd->elf))
- break;
-
- /* OK, it checks out. Replace the call. */
- offset = rel[1].r_offset;
+ /* IE */
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)
+ contents + rel->r_offset - d_offset);
+ insn1 &= (1 << 26) - (1 << 2);
+ insn1 |= 58 << 26; /* ld */
+ insn2 = 0x7c636a14; /* add 3,3,13 */
+ if (offset != (bfd_vma) -1)
+ rel[1].r_info = ELF64_R_INFO (STN_UNDEF, 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);
+ }
+ else
+ {
+ /* LE */
+ insn1 = 0x3c6d0000; /* addis 3,13,0 */
+ insn2 = 0x38630000; /* addi 3,3,0 */
+ if (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);
+ /* 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);
}
- else
+ else if (toc_symndx != 0)
+ {
+ r_symndx = toc_symndx;
+ rel->r_addend = toc_addend;
+ }
+ r_type = R_PPC64_TPREL16_HA;
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
+ if (offset != (bfd_vma) -1)
{
- /* 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->elf.tls_sec->vma + DTP_OFFSET;
- rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
- }
- 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 += 2;
+ rel[1].r_offset = offset + d_offset;
+ rel[1].r_addend = rel->r_addend;
}
+ }
+ bfd_put_32 (output_bfd, insn1,
+ contents + rel->r_offset - d_offset);
+ if (offset != (bfd_vma) -1)
+ {
+ insn3 = bfd_get_32 (output_bfd,
+ contents + offset + 4);
if (insn3 == NOP
|| insn3 == CROR_151515 || insn3 == CROR_313131)
{
- insn3 = insn2;
- insn2 = NOP;
rel[1].r_offset += 4;
+ bfd_put_32 (output_bfd, insn2, contents + offset + 4);
+ insn2 = NOP;
}
- 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);
- if (tls_gd == 0 || toc_symndx != 0)
+ }
+ if ((tls_mask & tls_gd) == 0
+ && (tls_gd == 0 || toc_symndx != 0))
+ {
+ /* We changed the symbol. Start over in order
+ to get h, sym, sec etc. right. */
+ rel--;
+ continue;
+ }
+ }
+ break;
+
+ case R_PPC64_TLSGD:
+ if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
+ {
+ unsigned int insn2, insn3;
+ bfd_vma offset = rel->r_offset;
+
+ if ((tls_mask & TLS_TPRELGD) != 0)
+ {
+ /* IE */
+ r_type = R_PPC64_NONE;
+ insn2 = 0x7c636a14; /* add 3,3,13 */
+ }
+ else
+ {
+ /* LE */
+ if (toc_symndx != 0)
{
- /* We changed the symbol. Start over in order
- to get h, sym, sec etc. right. */
- rel--;
- continue;
+ r_symndx = toc_symndx;
+ rel->r_addend = toc_addend;
}
+ r_type = R_PPC64_TPREL16_LO;
+ rel->r_offset = offset + d_offset;
+ insn2 = 0x38630000; /* addi 3,3,0 */
+ }
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
+ /* Zap the reloc on the _tls_get_addr call too. */
+ BFD_ASSERT (offset == rel[1].r_offset);
+ rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
+ insn3 = bfd_get_32 (output_bfd,
+ contents + offset + 4);
+ if (insn3 == NOP
+ || insn3 == CROR_151515 || insn3 == CROR_313131)
+ {
+ rel->r_offset += 4;
+ bfd_put_32 (output_bfd, insn2, contents + offset + 4);
+ insn2 = NOP;
+ }
+ bfd_put_32 (output_bfd, insn2, contents + offset);
+ if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
+ {
+ rel--;
+ continue;
}
}
break;
+ case R_PPC64_TLSLD:
+ if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
+ {
+ unsigned int insn2, insn3;
+ bfd_vma offset = rel->r_offset;
+
+ 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);
+
+ r_type = R_PPC64_TPREL16_LO;
+ rel->r_info = ELF64_R_INFO (r_symndx, r_type);
+ rel->r_offset = offset + d_offset;
+ /* Zap the reloc on the _tls_get_addr call too. */
+ BFD_ASSERT (offset == rel[1].r_offset);
+ rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
+ insn2 = 0x38630000; /* addi 3,3,0 */
+ insn3 = bfd_get_32 (output_bfd,
+ contents + offset + 4);
+ if (insn3 == NOP
+ || insn3 == CROR_151515 || insn3 == CROR_313131)
+ {
+ rel->r_offset += 4;
+ bfd_put_32 (output_bfd, insn2, contents + offset + 4);
+ insn2 = NOP;
+ }
+ bfd_put_32 (output_bfd, insn2, contents + offset);
+ rel--;
+ continue;
+ }
+ break;
+
case R_PPC64_DTPMOD64:
if (rel + 1 < relend
&& rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
base pointer. */
stub_entry = NULL;
fdh = h;
- if (((h != NULL
- && (((fdh = h->oh) != NULL
- && fdh->elf.plt.plist != NULL)
- || (fdh = h)->elf.plt.plist != NULL))
+ if (h != NULL
+ && h->oh != NULL
+ && h->oh->is_func_descriptor)
+ fdh = ppc_follow_link (h->oh);
+ if (((fdh != NULL
+ && fdh->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)))
+ != htab->stub_group[input_section->id].toc_off))
+ || (h == NULL
+ && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
&& (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
rel, htab)) != NULL
&& (stub_entry->stub_type == ppc_stub_plt_call
if (nop == NOP
|| nop == CROR_151515 || nop == CROR_313131)
{
- bfd_put_32 (input_bfd, LD_R2_40R1,
- contents + rel->r_offset + 4);
+ if (h != NULL
+ && (h == htab->tls_get_addr_fd
+ || h == htab->tls_get_addr)
+ && !htab->no_tls_get_addr_opt)
+ {
+ /* Special stub used, leave nop alone. */
+ }
+ else
+ bfd_put_32 (input_bfd, LD_R2_40R1,
+ contents + rel->r_offset + 4);
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. */
+ 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 ((br & 1) == 0)
+ if (info->executable && (br & 1) == 0)
can_plt_call = TRUE;
+ else
+ stub_entry = NULL;
}
else if (h != NULL
&& strcmp (h->elf.root.root.string,
&& get_opd_info (sec) != NULL)
{
/* The branch destination is the value of the opd entry. */
- bfd_vma off = (relocation - sec->output_section->vma
- - sec->output_offset + rel->r_addend);
+ 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)
{
+ input_section->output_section->vma);
if (stub_entry == NULL
- && (relocation + rel->r_addend - from + max_br_offset
+ && (relocation + addend - from + max_br_offset
>= 2 * max_br_offset)
&& r_type != R_PPC64_ADDR14_BRTAKEN
&& r_type != R_PPC64_ADDR14_BRNTAKEN)
else
{
/* Invert 'y' bit if not the default. */
- if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
+ if ((bfd_signed_vma) (relocation + addend - from) < 0)
insn ^= 0x01 << 21;
}
&& h->elf.root.type == bfd_link_hash_undefweak
&& r_type == R_PPC64_REL24
&& relocation == 0
- && rel->r_addend == 0)
+ && addend == 0)
{
bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
continue;
case R_PPC64_NONE:
case R_PPC64_TLS:
+ case R_PPC64_TLSGD:
+ case R_PPC64_TLSLD:
case R_PPC64_GNU_VTINHERIT:
case R_PPC64_GNU_VTENTRY:
continue;
}
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;
/* 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;
+ asection *relgot;
+ bfd_boolean ifunc;
*offp = off | 1;
+ relgot = NULL;
+ ifunc = (h != NULL
+ ? h->elf.type == STT_GNU_IFUNC
+ : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
if ((info->shared || indx != 0)
- && (h == NULL
+ && (offp == &ppc64_tlsld_got (input_bfd)->offset
+ || h == NULL
|| ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
|| h->elf.root.type != bfd_link_hash_undefweak))
+ relgot = ppc64_elf_tdata (input_bfd)->relgot;
+ else if (ifunc)
+ relgot = htab->reliplt;
+ if (relgot != NULL)
{
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;
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);
}
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
else if (tls_type == (TLS_TLS | TLS_TPREL))
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
- else if (indx == 0)
+ else if (indx != 0)
+ outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
+ else
{
- outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
+ if (ifunc)
+ outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
+ else
+ outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
/* Write the .got section contents for the sake
of prelink. */
bfd_put_64 (output_bfd, outrel.r_addend + relocation,
loc);
}
- else
- outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
{
emitting a reloc. */
else
{
- relocation += rel->r_addend;
+ relocation += addend;
if (tls_type == (TLS_TLS | TLS_LD))
relocation = 1;
else if (tls_type != 0)
{
struct plt_entry *ent;
for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
- if (ent->addend == rel->r_addend
+ if (ent->addend == orig_addend
&& ent->plt.offset != (bfd_vma) -1)
{
relocation = (htab->plt->output_section->vma
relocation += htab->stub_group[sec->id].toc_off;
else
unresolved_reloc = TRUE;
- goto dodyn2;
+ 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.
addend -= sec->output_section->vma;
break;
+ case R_PPC64_REL16:
+ case R_PPC64_REL16_LO:
+ case R_PPC64_REL16_HI:
+ case R_PPC64_REL16_HA:
+ break;
+
case R_PPC64_REL14:
case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_REL14_BRTAKEN:
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. */
-
- dodyn2:
if ((input_section->flags & SEC_ALLOC) == 0)
break;
&& (h == NULL
|| ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
|| h->elf.root.type != bfd_link_hash_undefweak)
- && (MUST_BE_DYN_RELOC (r_type)
+ && (must_be_dyn_reloc (info, r_type)
|| !SYMBOL_CALLS_LOCAL (info, &h->elf)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
&& h->elf.dynindx != -1
&& !h->elf.non_got_ref
- && h->elf.def_dynamic
- && !h->elf.def_regular))
+ && !h->elf.def_regular)
+ || (!info->shared
+ && (h != NULL
+ ? h->elf.type == STT_GNU_IFUNC
+ : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
{
- Elf_Internal_Rela outrel;
bfd_boolean skip, relocate;
asection *sreloc;
- bfd_byte *loc;
bfd_vma out_off;
/* When generating a dynamic object, these relocations
entry in this lib. */
unresolved_reloc = FALSE;
}
- outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
+ if (!is_opd
+ && r_type == R_PPC64_ADDR64
+ && (h != NULL
+ ? h->elf.type == STT_GNU_IFUNC
+ : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
+ outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
+ else
+ {
+ outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
- /* We need to relocate .opd contents for ld.so.
- Prelink also wants simple and consistent rules
- for relocs. This make all RELATIVE relocs have
- *r_offset equal to r_addend. */
- relocate = TRUE;
+ /* We need to relocate .opd contents for ld.so.
+ Prelink also wants simple and consistent rules
+ for relocs. This make all RELATIVE relocs have
+ *r_offset equal to r_addend. */
+ relocate = TRUE;
+ }
}
else
{
long indx = 0;
- if (bfd_is_abs_section (sec))
+ if (h != NULL
+ ? h->elf.type == STT_GNU_IFUNC
+ : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
+ {
+ (*_bfd_error_handler)
+ (_("%B(%A+0x%lx): relocation %s for indirect "
+ "function %s unsupported"),
+ input_bfd,
+ input_section,
+ (long) rel->r_offset,
+ ppc64_elf_howto_table[r_type]->name,
+ sym_name);
+ ret = FALSE;
+ }
+ else 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
}
sreloc = elf_section_data (input_section)->sreloc;
+ if (!htab->elf.dynamic_sections_created)
+ sreloc = htab->reliplt;
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);
case R_PPC64_COPY:
case R_PPC64_GLOB_DAT:
case R_PPC64_JMP_SLOT:
+ case R_PPC64_JMP_IREL:
case R_PPC64_RELATIVE:
/* We shouldn't ever see these dynamic relocs in relocatable
files. */
break;
case R_PPC64_ADDR16_HA:
+ case R_PPC64_REL16_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:
if (!((*info->callbacks->reloc_overflow)
(info, (h ? &h->elf.root : NULL), sym_name,
ppc64_elf_howto_table[r_type]->name,
- rel->r_addend, input_bfd, input_section, rel->r_offset)))
+ orig_addend, input_bfd, input_section, rel->r_offset)))
return FALSE;
}
else
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)
+ if (is_opd && (info->emitrelocations || info->relocatable))
{
bfd_size_type amt;
amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
/* Adjust the value of any local symbols in opd sections. */
-static bfd_boolean
+static int
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)
{
- long *opd_adjust, adjust;
+ struct _opd_sec_data *opd;
+ long adjust;
bfd_vma value;
if (h != NULL)
- return TRUE;
+ return 1;
- opd_adjust = get_opd_info (input_sec);
- if (opd_adjust == NULL)
- return TRUE;
+ opd = get_opd_info (input_sec);
+ if (opd == NULL || opd->adjust == NULL)
+ return 1;
value = elfsym->st_value - input_sec->output_offset;
if (!info->relocatable)
value -= input_sec->output_section->vma;
- adjust = opd_adjust[value / 8];
+ adjust = opd->adjust[value / 8];
if (adjust == -1)
- elfsym->st_value = 0;
- else
- elfsym->st_value += adjust;
- return TRUE;
+ return 2;
+
+ elfsym->st_value += adjust;
+ return 1;
}
/* Finish up dynamic symbol handling. We set the contents of various
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;
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));
+ if (!htab->elf.dynamic_sections_created
+ || h->dynindx == -1)
+ {
+ BFD_ASSERT (h->type == STT_GNU_IFUNC
+ && h->def_regular
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak));
+ rela.r_offset = (htab->iplt->output_section->vma
+ + htab->iplt->output_offset
+ + ent->plt.offset);
+ rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
+ rela.r_addend = (h->root.u.def.value
+ + h->root.u.def.section->output_offset
+ + h->root.u.def.section->output_section->vma
+ + ent->addend);
+ loc = (htab->reliplt->contents
+ + (htab->reliplt->reloc_count++
+ * sizeof (Elf64_External_Rela)));
+ }
+ else
+ {
+ 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
+ + ((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->needs_copy)
{
- Elf_Internal_Rela rela;
- bfd_byte *loc;
-
/* This symbol needs a copy reloc. Set it up. */
if (h->dynindx == -1
= 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. */
{
asection *s;
- if (!is_ppc64_elf_target (dynobj->xvec))
+ if (!is_ppc64_elf (dynobj))
continue;
s = ppc64_elf_tdata (dynobj)->got;
projects / deliverable / binutils-gdb.git / blobdiff