/* Alpha specific support for 64-bit ELF
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright (C) 1996-2019 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@tamu.edu>.
-This file is part of BFD, the Binary File Descriptor library.
+ 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
-(at your option) any later version.
+ 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 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* We need a published ABI spec for this. Until one comes out, don't
assume this'll remain unchanged forever. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
+#include "ecoff-bfd.h"
#include "elf/alpha.h"
#define ECOFF_64
#include "ecoffswap.h"
-static int alpha_elf_dynamic_symbol_p
- PARAMS((struct elf_link_hash_entry *, struct bfd_link_info *));
-static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc
- PARAMS((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create
- PARAMS((bfd *));
-
-static bfd_reloc_status_type elf64_alpha_reloc_nil
- PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static bfd_reloc_status_type elf64_alpha_reloc_bad
- PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp
- PARAMS((bfd *, bfd_vma, bfd_byte *, bfd_byte *));
-static bfd_reloc_status_type elf64_alpha_reloc_gpdisp
- PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-
-static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup
- PARAMS((bfd *, bfd_reloc_code_real_type));
-static void elf64_alpha_info_to_howto
- PARAMS((bfd *, arelent *, Elf64_Internal_Rela *));
-
-static boolean elf64_alpha_mkobject
- PARAMS((bfd *));
-static boolean elf64_alpha_object_p
- PARAMS((bfd *));
-static boolean elf64_alpha_section_from_shdr
- PARAMS((bfd *, Elf64_Internal_Shdr *, char *));
-static boolean elf64_alpha_section_flags
- PARAMS((flagword *, Elf64_Internal_Shdr *));
-static boolean elf64_alpha_fake_sections
- PARAMS((bfd *, Elf64_Internal_Shdr *, asection *));
-static boolean elf64_alpha_create_got_section
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_create_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-
-static boolean elf64_alpha_read_ecoff_info
- PARAMS((bfd *, asection *, struct ecoff_debug_info *));
-static boolean elf64_alpha_is_local_label_name
- PARAMS((bfd *, const char *));
-static boolean elf64_alpha_find_nearest_line
- PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **,
- const char **, unsigned int *));
-
-#if defined(__STDC__) || defined(ALMOST_STDC)
-struct alpha_elf_link_hash_entry;
+\f
+/* Instruction data for plt generation and relaxation. */
+
+#define OP_LDA 0x08
+#define OP_LDAH 0x09
+#define OP_LDQ 0x29
+#define OP_BR 0x30
+#define OP_BSR 0x34
+
+#define INSN_LDA (OP_LDA << 26)
+#define INSN_LDAH (OP_LDAH << 26)
+#define INSN_LDQ (OP_LDQ << 26)
+#define INSN_BR (OP_BR << 26)
+
+#define INSN_ADDQ 0x40000400
+#define INSN_RDUNIQ 0x0000009e
+#define INSN_SUBQ 0x40000520
+#define INSN_S4SUBQ 0x40000560
+#define INSN_UNOP 0x2ffe0000
+
+#define INSN_JSR 0x68004000
+#define INSN_JMP 0x68000000
+#define INSN_JSR_MASK 0xfc00c000
+
+#define INSN_A(I,A) (I | (A << 21))
+#define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
+#define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
+#define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
+#define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
+
+/* PLT/GOT Stuff */
+
+/* Set by ld emulation. Putting this into the link_info or hash structure
+ is simply working too hard. */
+#ifdef USE_SECUREPLT
+bfd_boolean elf64_alpha_use_secureplt = TRUE;
+#else
+bfd_boolean elf64_alpha_use_secureplt = FALSE;
#endif
-static boolean elf64_alpha_output_extsym
- PARAMS((struct alpha_elf_link_hash_entry *, PTR));
-
-static boolean elf64_alpha_can_merge_gots
- PARAMS((bfd *, bfd *));
-static void elf64_alpha_merge_gots
- PARAMS((bfd *, bfd *));
-static boolean elf64_alpha_calc_got_offsets_for_symbol
- PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
-static void elf64_alpha_calc_got_offsets PARAMS ((struct bfd_link_info *));
-static boolean elf64_alpha_size_got_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_always_size_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static int alpha_dynamic_entries_for_reloc
- PARAMS ((int, int, int));
-static boolean elf64_alpha_calc_dynrel_sizes
- PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
-static boolean elf64_alpha_add_symbol_hook
- PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
- const char **, flagword *, asection **, bfd_vma *));
-static struct alpha_elf_got_entry *get_got_entry
- PARAMS ((bfd *, struct alpha_elf_link_hash_entry *, unsigned long,
- unsigned long, bfd_vma));
-static boolean elf64_alpha_check_relocs
- PARAMS((bfd *, struct bfd_link_info *, asection *sec,
- const Elf_Internal_Rela *));
-static boolean elf64_alpha_adjust_dynamic_symbol
- PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *));
-static boolean elf64_alpha_size_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_relocate_section
- PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-static boolean elf64_alpha_finish_dynamic_symbol
- PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- Elf_Internal_Sym *));
-static boolean elf64_alpha_finish_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_final_link
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_merge_ind_symbols
- PARAMS((struct alpha_elf_link_hash_entry *, PTR));
-static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs
- PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int));
-static enum elf_reloc_type_class elf64_alpha_reloc_type_class
- PARAMS ((const Elf_Internal_Rela *));
+#define OLD_PLT_HEADER_SIZE 32
+#define OLD_PLT_ENTRY_SIZE 12
+#define NEW_PLT_HEADER_SIZE 36
+#define NEW_PLT_ENTRY_SIZE 4
+
+#define PLT_HEADER_SIZE \
+ (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
+#define PLT_ENTRY_SIZE \
+ (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
+
+#define MAX_GOT_SIZE (64*1024)
+
+#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
\f
-struct alpha_elf_link_hash_entry
+
+/* Used to implement multiple .got subsections. */
+struct alpha_elf_got_entry
{
- struct elf_link_hash_entry root;
+ struct alpha_elf_got_entry *next;
- /* External symbol information. */
- EXTR esym;
+ /* Which .got subsection? */
+ bfd *gotobj;
- /* Cumulative flags for all the .got entries. */
- int flags;
+ /* The addend in effect for this entry. */
+ bfd_vma addend;
- /* Contexts (LITUSE) in which a literal was referenced. */
-#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
-#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
-#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
-#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
-#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
-#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
-#define ALPHA_ELF_LINK_HASH_LU_FUNC 0x38
+ /* The .got offset for this entry. */
+ int got_offset;
- /* Used to implement multiple .got subsections. */
- struct alpha_elf_got_entry
- {
- struct alpha_elf_got_entry *next;
+ /* The .plt offset for this entry. */
+ int plt_offset;
- /* which .got subsection? */
- bfd *gotobj;
+ /* How many references to this entry? */
+ int use_count;
- /* the addend in effect for this entry. */
- bfd_vma addend;
+ /* The relocation type of this entry. */
+ unsigned char reloc_type;
- /* the .got offset for this entry. */
- int got_offset;
+ /* How a LITERAL is used. */
+ unsigned char flags;
- /* How many references to this entry? */
- int use_count;
+ /* Have we initialized the dynamic relocation for this entry? */
+ unsigned char reloc_done;
- /* The relocation type of this entry. */
- unsigned char reloc_type;
+ /* Have we adjusted this entry for SEC_MERGE? */
+ unsigned char reloc_xlated;
+};
- /* How a LITERAL is used. */
- unsigned char flags;
+struct alpha_elf_reloc_entry
+{
+ struct alpha_elf_reloc_entry *next;
- /* Have we initialized the dynamic relocation for this entry? */
- unsigned char reloc_done;
+ /* Which .reloc section? */
+ asection *srel;
- /* Have we adjusted this entry for SEC_MERGE? */
- unsigned char reloc_xlated;
- } *got_entries;
+ /* What kind of relocation? */
+ unsigned int rtype;
- /* used to count non-got, non-plt relocations for delayed sizing
- of relocation sections. */
- struct alpha_elf_reloc_entry
- {
- struct alpha_elf_reloc_entry *next;
+ /* Is this against read-only section? */
+ unsigned int reltext : 1;
+
+ /* How many did we find? */
+ unsigned long count;
+};
+
+struct alpha_elf_link_hash_entry
+{
+ struct elf_link_hash_entry root;
+
+ /* External symbol information. */
+ EXTR esym;
- /* which .reloc section? */
- asection *srel;
+ /* Cumulative flags for all the .got entries. */
+ int flags;
- /* what kind of relocation? */
- unsigned int rtype;
+ /* Contexts in which a literal was referenced. */
+#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
+#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
+#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
+#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
+#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
+#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
+#define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
+#define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
+#define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
- /* is this against read-only section? */
- unsigned int reltext : 1;
+ /* Used to implement multiple .got subsections. */
+ struct alpha_elf_got_entry *got_entries;
- /* how many did we find? */
- unsigned long count;
- } *reloc_entries;
+ /* Used to count non-got, non-plt relocations for delayed sizing
+ of relocation sections. */
+ struct alpha_elf_reloc_entry *reloc_entries;
};
/* Alpha ELF linker hash table. */
/* The head of a list of .got subsections linked through
alpha_elf_tdata(abfd)->got_link_next. */
bfd *got_list;
+
+ /* The most recent relax pass that we've seen. The GOTs
+ should be regenerated if this doesn't match. */
+ int relax_trip;
};
/* Look up an entry in a Alpha ELF linker hash table. */
#define alpha_elf_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
- (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
+ (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
(info)))
/* Get the Alpha ELF linker hash table from a link_info structure. */
#define alpha_elf_hash_table(p) \
- ((struct alpha_elf_link_hash_table *) ((p)->hash))
+ (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
+ == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL)
/* Get the object's symbols as our own entry type. */
#define alpha_elf_sym_hashes(abfd) \
((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
-/* Should we do dynamic things to this symbol? */
+/* Should we do dynamic things to this symbol? This differs from the
+ generic version in that we never need to consider function pointer
+ equality wrt PLT entries -- we don't create a PLT entry if a symbol's
+ address is ever taken. */
-static int
-alpha_elf_dynamic_symbol_p (h, info)
- struct elf_link_hash_entry *h;
- struct bfd_link_info *info;
+static inline bfd_boolean
+alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h,
+ struct bfd_link_info *info)
{
- if (h == NULL)
- return false;
-
- 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;
-
- if (h->dynindx == -1)
- return false;
-
- if (h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_defweak)
- return true;
-
- switch (ELF_ST_VISIBILITY (h->other))
- {
- case STV_DEFAULT:
- break;
- case STV_HIDDEN:
- case STV_INTERNAL:
- return false;
- case STV_PROTECTED:
- if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
- return false;
- break;
- }
-
- if ((info->shared && !info->symbolic)
- || ((h->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))
- == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)))
- return true;
-
- return false;
+ return _bfd_elf_dynamic_symbol_p (h, info, 0);
}
/* Create an entry in a Alpha ELF linker hash table. */
static struct bfd_hash_entry *
-elf64_alpha_link_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
struct alpha_elf_link_hash_entry *ret =
(struct alpha_elf_link_hash_entry *) entry;
/* Create a Alpha ELF linker hash table. */
static struct bfd_link_hash_table *
-elf64_alpha_bfd_link_hash_table_create (abfd)
- bfd *abfd;
+elf64_alpha_bfd_link_hash_table_create (bfd *abfd)
{
struct alpha_elf_link_hash_table *ret;
bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table);
if (ret == (struct alpha_elf_link_hash_table *) NULL)
return NULL;
- if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
- elf64_alpha_link_hash_newfunc))
+ if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
+ elf64_alpha_link_hash_newfunc,
+ sizeof (struct alpha_elf_link_hash_entry),
+ ALPHA_ELF_DATA))
{
free (ret);
return NULL;
return &ret->root.root;
}
\f
+/* Alpha ELF follows MIPS ELF in using a special find_nearest_line
+ routine in order to handle the ECOFF debugging information. */
+
+struct alpha_elf_find_line
+{
+ struct ecoff_debug_info d;
+ struct ecoff_find_line i;
+};
+
/* We have some private fields hanging off of the elf_tdata structure. */
struct alpha_elf_obj_tdata
/* For every got, this is the sum of the number of words required
to hold all of the member object's local got. */
int local_got_size;
+
+ /* Used by elf64_alpha_find_nearest_line entry point. */
+ struct alpha_elf_find_line *find_line_info;
+
};
#define alpha_elf_tdata(abfd) \
((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
-static boolean
-elf64_alpha_mkobject (abfd)
- bfd *abfd;
+#define is_alpha_elf(bfd) \
+ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
+ && elf_tdata (bfd) != NULL \
+ && elf_object_id (bfd) == ALPHA_ELF_DATA)
+
+static bfd_boolean
+elf64_alpha_mkobject (bfd *abfd)
{
- bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
- abfd->tdata.any = bfd_zalloc (abfd, amt);
- if (abfd->tdata.any == NULL)
- return false;
- return true;
+ return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata),
+ ALPHA_ELF_DATA);
}
-static boolean
-elf64_alpha_object_p (abfd)
- bfd *abfd;
+static bfd_boolean
+elf64_alpha_object_p (bfd *abfd)
{
- /* Allocate our special target data. */
- struct alpha_elf_obj_tdata *new_tdata;
- bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
- new_tdata = bfd_zalloc (abfd, amt);
- if (new_tdata == NULL)
- return false;
- new_tdata->root = *abfd->tdata.elf_obj_data;
- abfd->tdata.any = new_tdata;
-
/* Set the right machine number for an Alpha ELF file. */
return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
}
\f
+/* A relocation function which doesn't do anything. */
+
+static bfd_reloc_status_type
+elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
+ asymbol *sym ATTRIBUTE_UNUSED,
+ void * data ATTRIBUTE_UNUSED, asection *sec,
+ bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
+{
+ if (output_bfd)
+ reloc->address += sec->output_offset;
+ return bfd_reloc_ok;
+}
+
+/* A relocation function used for an unsupported reloc. */
+
+static bfd_reloc_status_type
+elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
+ asymbol *sym ATTRIBUTE_UNUSED,
+ void * data ATTRIBUTE_UNUSED, asection *sec,
+ bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
+{
+ if (output_bfd)
+ reloc->address += sec->output_offset;
+ return bfd_reloc_notsupported;
+}
+
+/* Do the work of the GPDISP relocation. */
+
+static bfd_reloc_status_type
+elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah,
+ bfd_byte *p_lda)
+{
+ bfd_reloc_status_type ret = bfd_reloc_ok;
+ bfd_vma addend;
+ unsigned long i_ldah, i_lda;
+
+ i_ldah = bfd_get_32 (abfd, p_ldah);
+ i_lda = bfd_get_32 (abfd, p_lda);
+
+ /* Complain if the instructions are not correct. */
+ if (((i_ldah >> 26) & 0x3f) != 0x09
+ || ((i_lda >> 26) & 0x3f) != 0x08)
+ ret = bfd_reloc_dangerous;
+
+ /* Extract the user-supplied offset, mirroring the sign extensions
+ that the instructions perform. */
+ addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
+ addend = (addend ^ 0x80008000) - 0x80008000;
+
+ gpdisp += addend;
+
+ if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
+ || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
+ ret = bfd_reloc_overflow;
+
+ /* compensate for the sign extension again. */
+ i_ldah = ((i_ldah & 0xffff0000)
+ | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
+ i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
+
+ bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
+ bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
+
+ return ret;
+}
+
+/* The special function for the GPDISP reloc. */
+
+static bfd_reloc_status_type
+elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry,
+ asymbol *sym ATTRIBUTE_UNUSED, void * data,
+ asection *input_section, bfd *output_bfd,
+ char **err_msg)
+{
+ bfd_reloc_status_type ret;
+ bfd_vma gp, relocation;
+ bfd_vma high_address;
+ bfd_byte *p_ldah, *p_lda;
+
+ /* Don't do anything if we're not doing a final link. */
+ if (output_bfd)
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ high_address = bfd_get_section_limit (abfd, input_section);
+ if (reloc_entry->address > high_address
+ || reloc_entry->address + reloc_entry->addend > high_address)
+ return bfd_reloc_outofrange;
+
+ /* The gp used in the portion of the output object to which this
+ input object belongs is cached on the input bfd. */
+ gp = _bfd_get_gp_value (abfd);
+
+ relocation = (input_section->output_section->vma
+ + input_section->output_offset
+ + reloc_entry->address);
+
+ p_ldah = (bfd_byte *) data + reloc_entry->address;
+ p_lda = p_ldah + reloc_entry->addend;
+
+ ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
+
+ /* Complain if the instructions are not correct. */
+ if (ret == bfd_reloc_dangerous)
+ *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
+
+ return ret;
+}
+
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
from smaller values. Start with zero, widen, *then* decrement. */
#define MINUS_ONE (((bfd_vma)0) - 1)
+
#define SKIP_HOWTO(N) \
- HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
+ HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
static reloc_howto_type elf64_alpha_howto_table[] =
{
HOWTO (R_ALPHA_NONE, /* type */
0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- true, /* pc_relative */
+ 3, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_nil, /* special_function */
"NONE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 32 bit reference to a symbol. */
HOWTO (R_ALPHA_REFLONG, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"REFLONG", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 64 bit reference to a symbol. */
HOWTO (R_ALPHA_REFQUAD, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"REFQUAD", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 32 bit GP relative offset. This is just like REFLONG except
that when the value is used the value of the gp register will be
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPREL32", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Used for an instruction that refers to memory off the GP register. */
HOWTO (R_ALPHA_LITERAL, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"ELF_LITERAL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* This reloc only appears immediately following an ELF_LITERAL reloc.
It identifies a use of the literal. The symbol index is special:
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_nil, /* special_function */
"LITUSE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Load the gp register. This is always used for a ldah instruction
which loads the upper 16 bits of the gp register. The symbol
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_gpdisp, /* special_function */
"GPDISP", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 21 bit branch. */
HOWTO (R_ALPHA_BRADDR, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
21, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"BRADDR", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x1fffff, /* src_mask */
0x1fffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A hint for a jump to a register. */
HOWTO (R_ALPHA_HINT, /* type */
2, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
14, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"HINT", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x3fff, /* src_mask */
0x3fff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* 16 bit PC relative offset. */
HOWTO (R_ALPHA_SREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"SREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* 32 bit PC relative offset. */
HOWTO (R_ALPHA_SREL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"SREL32", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 64 bit PC relative offset. */
HOWTO (R_ALPHA_SREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"SREL64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* Skip 12 - 16; deprecated ECOFF relocs. */
SKIP_HOWTO (12),
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPRELHIGH", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The low 16 bits of the displacement from GP to the target. */
HOWTO (R_ALPHA_GPRELLOW,
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPRELLOW", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16-bit displacement from the GP to the target. */
HOWTO (R_ALPHA_GPREL16,
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Skip 20 - 23; deprecated ECOFF relocs. */
SKIP_HOWTO (20),
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"COPY",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A dynamic relocation for a .got entry. */
HOWTO (R_ALPHA_GLOB_DAT,
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"GLOB_DAT",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A dynamic relocation for a .plt entry. */
HOWTO (R_ALPHA_JMP_SLOT,
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"JMP_SLOT",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A dynamic relocation to add the base of the DSO to a 64-bit field. */
HOWTO (R_ALPHA_RELATIVE,
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"RELATIVE",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A 21 bit branch that adjusts for gp loads. */
HOWTO (R_ALPHA_BRSGP, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
21, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"BRSGP", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x1fffff, /* src_mask */
0x1fffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* Creates a tls_index for the symbol in the got. */
HOWTO (R_ALPHA_TLSGD, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TLSGD", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Creates a tls_index for the (current) module in the got. */
HOWTO (R_ALPHA_TLSLDM, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TLSLDM", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A dynamic relocation for a DTP module entry. */
HOWTO (R_ALPHA_DTPMOD64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPMOD64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Creates a 64-bit offset in the got for the displacement
from DTP to the target. */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GOTDTPREL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A dynamic relocation for a displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPREL64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The high 16 bits of the displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPRELHI, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPRELHI", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The low 16 bits of the displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPRELLO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPRELLO", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16-bit displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Creates a 64-bit offset in the got for the displacement
from TP to the target. */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GOTTPREL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A dynamic relocation for a displacement from TP to the target. */
HOWTO (R_ALPHA_TPREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPREL64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The high 16 bits of the displacement from TP to the target. */
HOWTO (R_ALPHA_TPRELHI, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPRELHI", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The low 16 bits of the displacement from TP to the target. */
HOWTO (R_ALPHA_TPRELLO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPRELLO", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16-bit displacement from TP to the target. */
HOWTO (R_ALPHA_TPREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
};
-/* A relocation function which doesn't do anything. */
+/* A mapping from BFD reloc types to Alpha ELF reloc types. */
-static bfd_reloc_status_type
-elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *reloc;
- asymbol *sym ATTRIBUTE_UNUSED;
- PTR data ATTRIBUTE_UNUSED;
- asection *sec;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+struct elf_reloc_map
{
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_ok;
-}
+ bfd_reloc_code_real_type bfd_reloc_val;
+ int elf_reloc_val;
+};
-/* A relocation function used for an unsupported reloc. */
+static const struct elf_reloc_map elf64_alpha_reloc_map[] =
+{
+ {BFD_RELOC_NONE, R_ALPHA_NONE},
+ {BFD_RELOC_32, R_ALPHA_REFLONG},
+ {BFD_RELOC_64, R_ALPHA_REFQUAD},
+ {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
+ {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
+ {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
+ {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
+ {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
+ {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
+ {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
+ {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
+ {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
+ {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
+ {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
+ {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
+ {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
+ {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
+ {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
+ {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
+ {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
+ {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
+ {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
+ {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
+ {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
+ {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
+ {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
+ {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
+ {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
+ {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
+ {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
+};
-static bfd_reloc_status_type
-elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *reloc;
- asymbol *sym ATTRIBUTE_UNUSED;
- PTR data ATTRIBUTE_UNUSED;
- asection *sec;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+/* Given a BFD reloc type, return a HOWTO structure. */
+
+static reloc_howto_type *
+elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_notsupported;
+ const struct elf_reloc_map *i, *e;
+ i = e = elf64_alpha_reloc_map;
+ e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
+ for (; i != e; ++i)
+ {
+ if (i->bfd_reloc_val == code)
+ return &elf64_alpha_howto_table[i->elf_reloc_val];
+ }
+ return 0;
}
-/* Do the work of the GPDISP relocation. */
-
-static bfd_reloc_status_type
-elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
- bfd *abfd;
- bfd_vma gpdisp;
- bfd_byte *p_ldah;
- bfd_byte *p_lda;
+static reloc_howto_type *
+elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
{
- bfd_reloc_status_type ret = bfd_reloc_ok;
- bfd_vma addend;
- unsigned long i_ldah, i_lda;
+ unsigned int i;
- i_ldah = bfd_get_32 (abfd, p_ldah);
- i_lda = bfd_get_32 (abfd, p_lda);
+ for (i = 0;
+ i < (sizeof (elf64_alpha_howto_table)
+ / sizeof (elf64_alpha_howto_table[0]));
+ i++)
+ if (elf64_alpha_howto_table[i].name != NULL
+ && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0)
+ return &elf64_alpha_howto_table[i];
- /* Complain if the instructions are not correct. */
- if (((i_ldah >> 26) & 0x3f) != 0x09
- || ((i_lda >> 26) & 0x3f) != 0x08)
- ret = bfd_reloc_dangerous;
+ return NULL;
+}
- /* Extract the user-supplied offset, mirroring the sign extensions
- that the instructions perform. */
- addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
- addend = (addend ^ 0x80008000) - 0x80008000;
+/* Given an Alpha ELF reloc type, fill in an arelent structure. */
- gpdisp += addend;
+static bfd_boolean
+elf64_alpha_info_to_howto (bfd *abfd, arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
+{
+ unsigned r_type = ELF64_R_TYPE(dst->r_info);
- if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
- || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
- ret = bfd_reloc_overflow;
-
- /* compensate for the sign extension again. */
- i_ldah = ((i_ldah & 0xffff0000)
- | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
- i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
+ if (r_type >= R_ALPHA_max)
+ {
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ cache_ptr->howto = &elf64_alpha_howto_table[r_type];
+ return TRUE;
+}
- bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
- bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
+/* These two relocations create a two-word entry in the got. */
+#define alpha_got_entry_size(r_type) \
+ (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
- return ret;
-}
+/* This is PT_TLS segment p_vaddr. */
+#define alpha_get_dtprel_base(info) \
+ (elf_hash_table (info)->tls_sec->vma)
-/* The special function for the GPDISP reloc. */
+/* Main program TLS (whose template starts at PT_TLS p_vaddr)
+ is assigned offset round(16, PT_TLS p_align). */
+#define alpha_get_tprel_base(info) \
+ (elf_hash_table (info)->tls_sec->vma \
+ - align_power ((bfd_vma) 16, \
+ elf_hash_table (info)->tls_sec->alignment_power))
+\f
+/* Handle an Alpha specific section when reading an object file. This
+ is called when bfd_section_from_shdr finds a section with an unknown
+ type.
+ FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
+ how to. */
-static bfd_reloc_status_type
-elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
- output_bfd, err_msg)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *sym ATTRIBUTE_UNUSED;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **err_msg;
+static bfd_boolean
+elf64_alpha_section_from_shdr (bfd *abfd,
+ Elf_Internal_Shdr *hdr,
+ const char *name,
+ int shindex)
{
- bfd_reloc_status_type ret;
- bfd_vma gp, relocation;
- bfd_byte *p_ldah, *p_lda;
+ asection *newsect;
- /* Don't do anything if we're not doing a final link. */
- if (output_bfd)
+ /* There ought to be a place to keep ELF backend specific flags, but
+ at the moment there isn't one. We just keep track of the
+ sections by their name, instead. Fortunately, the ABI gives
+ suggested names for all the MIPS specific sections, so we will
+ probably get away with this. */
+ switch (hdr->sh_type)
{
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
+ case SHT_ALPHA_DEBUG:
+ if (strcmp (name, ".mdebug") != 0)
+ return FALSE;
+ break;
+ default:
+ return FALSE;
}
- if (reloc_entry->address > input_section->_cooked_size ||
- reloc_entry->address + reloc_entry->addend > input_section->_cooked_size)
- return bfd_reloc_outofrange;
-
- /* The gp used in the portion of the output object to which this
- input object belongs is cached on the input bfd. */
- gp = _bfd_get_gp_value (abfd);
+ if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
+ return FALSE;
+ newsect = hdr->bfd_section;
- relocation = (input_section->output_section->vma
- + input_section->output_offset
- + reloc_entry->address);
+ if (hdr->sh_type == SHT_ALPHA_DEBUG)
+ {
+ if (!bfd_set_section_flags (newsect,
+ bfd_section_flags (newsect) | SEC_DEBUGGING))
+ return FALSE;
+ }
- p_ldah = (bfd_byte *) data + reloc_entry->address;
- p_lda = p_ldah + reloc_entry->addend;
+ return TRUE;
+}
- ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
+/* Convert Alpha specific section flags to bfd internal section flags. */
- /* Complain if the instructions are not correct. */
- if (ret == bfd_reloc_dangerous)
- *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
+static bfd_boolean
+elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
+{
+ if (hdr->sh_flags & SHF_ALPHA_GPREL)
+ *flags |= SEC_SMALL_DATA;
- return ret;
+ return TRUE;
}
-/* A mapping from BFD reloc types to Alpha ELF reloc types. */
-
-struct elf_reloc_map
-{
- bfd_reloc_code_real_type bfd_reloc_val;
- int elf_reloc_val;
-};
+/* Set the correct type for an Alpha ELF section. We do this by the
+ section name, which is a hack, but ought to work. */
-static const struct elf_reloc_map elf64_alpha_reloc_map[] =
+static bfd_boolean
+elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
{
- {BFD_RELOC_NONE, R_ALPHA_NONE},
- {BFD_RELOC_32, R_ALPHA_REFLONG},
- {BFD_RELOC_64, R_ALPHA_REFQUAD},
- {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
- {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
- {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
- {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
- {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
- {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
- {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
- {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
- {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
- {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
- {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
- {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
- {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
- {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
- {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
- {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
- {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
- {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
- {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
- {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
- {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
- {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
- {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
- {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
- {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
- {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
-};
+ register const char *name;
-/* Given a BFD reloc type, return a HOWTO structure. */
+ name = bfd_section_name (sec);
-static reloc_howto_type *
-elf64_alpha_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
-{
- const struct elf_reloc_map *i, *e;
- i = e = elf64_alpha_reloc_map;
- e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
- for (; i != e; ++i)
+ if (strcmp (name, ".mdebug") == 0)
{
- if (i->bfd_reloc_val == code)
- return &elf64_alpha_howto_table[i->elf_reloc_val];
+ hdr->sh_type = SHT_ALPHA_DEBUG;
+ /* In a shared object on Irix 5.3, the .mdebug section has an
+ entsize of 0. FIXME: Does this matter? */
+ if ((abfd->flags & DYNAMIC) != 0 )
+ hdr->sh_entsize = 0;
+ else
+ hdr->sh_entsize = 1;
}
- return 0;
+ else if ((sec->flags & SEC_SMALL_DATA)
+ || strcmp (name, ".sdata") == 0
+ || strcmp (name, ".sbss") == 0
+ || strcmp (name, ".lit4") == 0
+ || strcmp (name, ".lit8") == 0)
+ hdr->sh_flags |= SHF_ALPHA_GPREL;
+
+ return TRUE;
}
-/* Given an Alpha ELF reloc type, fill in an arelent structure. */
+/* Hook called by the linker routine which adds symbols from an object
+ file. We use it to put .comm items in .sbss, and not .bss. */
-static void
-elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf64_Internal_Rela *dst;
+static bfd_boolean
+elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp, bfd_vma *valp)
{
- unsigned r_type;
+ if (sym->st_shndx == SHN_COMMON
+ && !bfd_link_relocatable (info)
+ && sym->st_size <= elf_gp_size (abfd))
+ {
+ /* Common symbols less than or equal to -G nn bytes are
+ automatically put into .sbss. */
- r_type = ELF64_R_TYPE(dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
- cache_ptr->howto = &elf64_alpha_howto_table[r_type];
-}
+ asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
-/* These two relocations create a two-word entry in the got. */
-#define alpha_got_entry_size(r_type) \
- (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
-\f
-/* These functions do relaxation for Alpha ELF.
+ if (scomm == NULL)
+ {
+ scomm = bfd_make_section_with_flags (abfd, ".scommon",
+ (SEC_ALLOC
+ | SEC_IS_COMMON
+ | SEC_LINKER_CREATED));
+ if (scomm == NULL)
+ return FALSE;
+ }
- Currently I'm only handling what I can do with existing compiler
- and assembler support, which means no instructions are removed,
- though some may be nopped. At this time GCC does not emit enough
- information to do all of the relaxing that is possible. It will
- take some not small amount of work for that to happen.
+ *secp = scomm;
+ *valp = sym->st_size;
+ }
- There are a couple of interesting papers that I once read on this
- subject, that I cannot find references to at the moment, that
- related to Alpha in particular. They are by David Wall, then of
- DEC WRL. */
+ return TRUE;
+}
-#define OP_LDA 0x08
-#define OP_LDAH 0x09
-#define INSN_JSR 0x68004000
-#define INSN_JSR_MASK 0xfc00c000
-#define OP_LDQ 0x29
-#define OP_BR 0x30
-#define OP_BSR 0x34
-#define INSN_UNOP 0x2ffe0000
+/* Create the .got section. */
-struct alpha_relax_info
+static bfd_boolean
+elf64_alpha_create_got_section (bfd *abfd,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED)
{
- bfd *abfd;
- asection *sec;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs, *relend;
- struct bfd_link_info *link_info;
- boolean changed_contents;
- boolean changed_relocs;
- bfd_vma gp;
- bfd *gotobj;
- asection *tsec;
- struct alpha_elf_link_hash_entry *h;
- struct alpha_elf_got_entry *gotent;
- unsigned char other;
-};
+ flagword flags;
+ asection *s;
-static Elf_Internal_Rela * elf64_alpha_relax_with_lituse
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel, Elf_Internal_Rela *irelend));
+ if (! is_alpha_elf (abfd))
+ return FALSE;
-static boolean elf64_alpha_relax_without_lituse
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel));
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+ s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
+ if (s == NULL
+ || !bfd_set_section_alignment (s, 3))
+ return FALSE;
-static bfd_vma elf64_alpha_relax_opt_call
- PARAMS((struct alpha_relax_info *info, bfd_vma symval));
+ alpha_elf_tdata (abfd)->got = s;
-static boolean elf64_alpha_relax_section
- PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
- boolean *again));
+ /* Make sure the object's gotobj is set to itself so that we default
+ to every object with its own .got. We'll merge .gots later once
+ we've collected each object's info. */
+ alpha_elf_tdata (abfd)->gotobj = abfd;
-static Elf_Internal_Rela *
-elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
- Elf_Internal_Rela *rel, *relend;
- bfd_vma offset;
- int type;
-{
- while (rel < relend)
- {
- if (rel->r_offset == offset
- && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
- return rel;
- ++rel;
- }
- return NULL;
+ return TRUE;
}
-static Elf_Internal_Rela *
-elf64_alpha_relax_with_lituse (info, symval, irel, irelend)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel, *irelend;
+/* Create all the dynamic sections. */
+
+static bfd_boolean
+elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
{
- Elf_Internal_Rela *urel;
- int flags, count, i;
- bfd_signed_vma disp;
- boolean fits16;
- boolean fits32;
- boolean lit_reused = false;
- boolean all_optimized = true;
- unsigned int lit_insn;
+ asection *s;
+ flagword flags;
+ struct elf_link_hash_entry *h;
- lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
- if (lit_insn >> 26 != OP_LDQ)
- {
- ((*_bfd_error_handler)
- ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
- bfd_archive_filename (info->abfd), info->sec->name,
- (unsigned long) irel->r_offset));
- return irel;
- }
+ if (! is_alpha_elf (abfd))
+ return FALSE;
- /* Summarize how this particular LITERAL is used. */
- for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
+ /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | (elf64_alpha_use_secureplt ? SEC_READONLY : 0));
+ s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags);
+ elf_hash_table (info)->splt = s;
+ if (s == NULL || ! bfd_set_section_alignment (s, 4))
+ return FALSE;
+
+ /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
+ .plt section. */
+ h = _bfd_elf_define_linkage_sym (abfd, info, s,
+ "_PROCEDURE_LINKAGE_TABLE_");
+ elf_hash_table (info)->hplt = h;
+ if (h == NULL)
+ return FALSE;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED | SEC_READONLY);
+ s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags);
+ elf_hash_table (info)->srelplt = s;
+ if (s == NULL || ! bfd_set_section_alignment (s, 3))
+ return FALSE;
+
+ if (elf64_alpha_use_secureplt)
{
- if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
- break;
- if (urel->r_addend <= 3)
- flags |= 1 << urel->r_addend;
+ flags = SEC_ALLOC | SEC_LINKER_CREATED;
+ s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
+ elf_hash_table (info)->sgotplt = s;
+ if (s == NULL || ! bfd_set_section_alignment (s, 3))
+ return FALSE;
}
- /* A little preparation for the loop... */
- disp = symval - info->gp;
+ /* We may or may not have created a .got section for this object, but
+ we definitely havn't done the rest of the work. */
- for (urel = irel+1, i = 0; i < count; ++i, ++urel)
+ if (alpha_elf_tdata(abfd)->gotobj == NULL)
{
- unsigned int insn;
- int insn_disp;
- bfd_signed_vma xdisp;
+ if (!elf64_alpha_create_got_section (abfd, info))
+ return FALSE;
+ }
- insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED | SEC_READONLY);
+ s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags);
+ elf_hash_table (info)->srelgot = s;
+ if (s == NULL
+ || !bfd_set_section_alignment (s, 3))
+ return FALSE;
- switch (urel->r_addend)
- {
- default: /* 0 = ADDRESS FORMAT */
- /* This type is really just a placeholder to note that all
- uses cannot be optimized, but to still allow some. */
- all_optimized = false;
- break;
+ /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
+ dynobj's .got section. We don't do this in the linker script
+ because we don't want to define the symbol if we are not creating
+ a global offset table. */
+ h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got,
+ "_GLOBAL_OFFSET_TABLE_");
+ elf_hash_table (info)->hgot = h;
+ if (h == NULL)
+ return FALSE;
- case 1: /* MEM FORMAT */
- /* We can always optimize 16-bit displacements. */
+ return TRUE;
+}
+\f
+/* Read ECOFF debugging information from a .mdebug section into a
+ ecoff_debug_info structure. */
- /* Extract the displacement from the instruction, sign-extending
- it if necessary, then test whether it is within 16 or 32 bits
- displacement from GP. */
- insn_disp = insn & 0x0000ffff;
- if (insn_disp & 0x00008000)
- insn_disp |= 0xffff0000; /* Negative: sign-extend. */
+static bfd_boolean
+elf64_alpha_read_ecoff_info (bfd *abfd, asection *section,
+ struct ecoff_debug_info *debug)
+{
+ HDRR *symhdr;
+ const struct ecoff_debug_swap *swap;
+ char *ext_hdr = NULL;
- xdisp = disp + insn_disp;
- fits16 = (xdisp >= - (bfd_signed_vma) 0x00008000 && xdisp < 0x00008000);
- fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 && xdisp < 0x7fff8000);
+ swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+ memset (debug, 0, sizeof (*debug));
- if (fits16)
- {
- /* Take the op code and dest from this insn, take the base
- register from the literal insn. Leave the offset alone. */
- insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPREL16);
- urel->r_addend = irel->r_addend;
- info->changed_relocs = true;
-
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
- info->changed_contents = true;
- }
+ ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
+ if (ext_hdr == NULL && swap->external_hdr_size != 0)
+ goto error_return;
- /* If all mem+byte, we can optimize 32-bit mem displacements. */
- else if (fits32 && !(flags & ~6))
- {
- /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
+ if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
+ swap->external_hdr_size))
+ goto error_return;
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELHIGH);
- lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
- bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
- info->contents + irel->r_offset);
- lit_reused = true;
- info->changed_contents = true;
+ symhdr = &debug->symbolic_header;
+ (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELLOW);
- urel->r_addend = irel->r_addend;
- info->changed_relocs = true;
- }
- else
- all_optimized = false;
- break;
+ /* The symbolic header contains absolute file offsets and sizes to
+ read. */
+#define READ(ptr, offset, count, size, type) \
+ if (symhdr->count == 0) \
+ debug->ptr = NULL; \
+ else \
+ { \
+ bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
+ debug->ptr = (type) bfd_malloc (amt); \
+ if (debug->ptr == NULL) \
+ goto error_return; \
+ if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
+ || bfd_bread (debug->ptr, amt, abfd) != amt) \
+ goto error_return; \
+ }
- case 2: /* BYTE OFFSET FORMAT */
- /* We can always optimize byte instructions. */
+ READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
+ READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *);
+ READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *);
+ READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *);
+ READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *);
+ READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
+ union aux_ext *);
+ READ (ss, cbSsOffset, issMax, sizeof (char), char *);
+ READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
+ READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *);
+ READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *);
+ READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *);
+#undef READ
- /* FIXME: sanity check the insn for byte op. Check that the
- literal dest reg is indeed Rb in the byte insn. */
+ debug->fdr = NULL;
- insn &= ~ (unsigned) 0x001ff000;
- insn |= ((symval & 7) << 13) | 0x1000;
+ return TRUE;
- urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- urel->r_addend = 0;
- info->changed_relocs = true;
+ error_return:
+ if (ext_hdr != NULL)
+ free (ext_hdr);
+ if (debug->line != NULL)
+ free (debug->line);
+ if (debug->external_dnr != NULL)
+ free (debug->external_dnr);
+ if (debug->external_pdr != NULL)
+ free (debug->external_pdr);
+ if (debug->external_sym != NULL)
+ free (debug->external_sym);
+ if (debug->external_opt != NULL)
+ free (debug->external_opt);
+ if (debug->external_aux != NULL)
+ free (debug->external_aux);
+ if (debug->ss != NULL)
+ free (debug->ss);
+ if (debug->ssext != NULL)
+ free (debug->ssext);
+ if (debug->external_fdr != NULL)
+ free (debug->external_fdr);
+ if (debug->external_rfd != NULL)
+ free (debug->external_rfd);
+ if (debug->external_ext != NULL)
+ free (debug->external_ext);
+ return FALSE;
+}
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
- info->changed_contents = true;
- break;
+/* Alpha ELF local labels start with '$'. */
- case 3: /* CALL FORMAT */
- {
- /* If not zero, place to jump without needing pv. */
- bfd_vma optdest = elf64_alpha_relax_opt_call (info, symval);
- bfd_vma org = (info->sec->output_section->vma
- + info->sec->output_offset
- + urel->r_offset + 4);
- bfd_signed_vma odisp;
+static bfd_boolean
+elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
+{
+ return name[0] == '$';
+}
- odisp = (optdest ? optdest : symval) - org;
- if (odisp >= -0x400000 && odisp < 0x400000)
- {
- Elf_Internal_Rela *xrel;
+static bfd_boolean
+elf64_alpha_find_nearest_line (bfd *abfd, asymbol **symbols,
+ asection *section, bfd_vma offset,
+ const char **filename_ptr,
+ const char **functionname_ptr,
+ unsigned int *line_ptr,
+ unsigned int *discriminator_ptr)
+{
+ asection *msec;
- /* Preserve branch prediction call stack when possible. */
- if ((insn & INSN_JSR_MASK) == INSN_JSR)
- insn = (OP_BSR << 26) | (insn & 0x03e00000);
- else
- insn = (OP_BR << 26) | (insn & 0x03e00000);
+ if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
+ filename_ptr, functionname_ptr,
+ line_ptr, discriminator_ptr,
+ dwarf_debug_sections,
+ &elf_tdata (abfd)->dwarf2_find_line_info)
+ == 1)
+ return TRUE;
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_BRADDR);
- urel->r_addend = irel->r_addend;
+ msec = bfd_get_section_by_name (abfd, ".mdebug");
+ if (msec != NULL)
+ {
+ flagword origflags;
+ struct alpha_elf_find_line *fi;
+ const struct ecoff_debug_swap * const swap =
+ get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- if (optdest)
- urel->r_addend += optdest - symval;
- else
- all_optimized = false;
+ /* If we are called during a link, alpha_elf_final_link may have
+ cleared the SEC_HAS_CONTENTS field. We force it back on here
+ if appropriate (which it normally will be). */
+ origflags = msec->flags;
+ if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
+ msec->flags |= SEC_HAS_CONTENTS;
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
+ fi = alpha_elf_tdata (abfd)->find_line_info;
+ if (fi == NULL)
+ {
+ bfd_size_type external_fdr_size;
+ char *fraw_src;
+ char *fraw_end;
+ struct fdr *fdr_ptr;
+ bfd_size_type amt = sizeof (struct alpha_elf_find_line);
- /* Kill any HINT reloc that might exist for this insn. */
- xrel = (elf64_alpha_find_reloc_at_ofs
- (info->relocs, info->relend, urel->r_offset,
- R_ALPHA_HINT));
- if (xrel)
- xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt);
+ if (fi == NULL)
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
- info->changed_contents = true;
- info->changed_relocs = true;
- }
- else
- all_optimized = false;
+ if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
- /* Even if the target is not in range for a direct branch,
- if we share a GP, we can eliminate the gp reload. */
- if (optdest)
- {
- Elf_Internal_Rela *gpdisp
- = (elf64_alpha_find_reloc_at_ofs
- (irel, irelend, urel->r_offset + 4, R_ALPHA_GPDISP));
- if (gpdisp)
- {
- bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
- bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
- unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
- unsigned int lda = bfd_get_32 (info->abfd, p_lda);
+ /* Swap in the FDR information. */
+ amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
+ fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
+ if (fi->d.fdr == NULL)
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
+ external_fdr_size = swap->external_fdr_size;
+ fdr_ptr = fi->d.fdr;
+ fraw_src = (char *) fi->d.external_fdr;
+ fraw_end = (fraw_src
+ + fi->d.symbolic_header.ifdMax * external_fdr_size);
+ for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
+ (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr);
- /* Verify that the instruction is "ldah $29,0($26)".
- Consider a function that ends in a noreturn call,
- and that the next function begins with an ldgp,
- and that by accident there is no padding between.
- In that case the insn would use $27 as the base. */
- if (ldah == 0x27ba0000 && lda == 0x23bd0000)
- {
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
+ alpha_elf_tdata (abfd)->find_line_info = fi;
- gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_contents = true;
- info->changed_relocs = true;
- }
- }
- }
- }
- break;
+ /* Note that we don't bother to ever free this information.
+ find_nearest_line is either called all the time, as in
+ objdump -l, so the information should be saved, or it is
+ rarely called, as in ld error messages, so the memory
+ wasted is unimportant. Still, it would probably be a
+ good idea for free_cached_info to throw it away. */
}
- }
- /* If all cases were optimized, we can reduce the use count on this
- got entry by one, possibly eliminating it. */
- if (all_optimized)
- {
- if (--info->gotent->use_count == 0)
+ if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
+ &fi->i, filename_ptr, functionname_ptr,
+ line_ptr))
{
- int sz = alpha_got_entry_size (info->gotent->reloc_type);
- alpha_elf_tdata (info->gotent->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotent->gotobj)->local_got_size -= sz;
+ msec->flags = origflags;
+ return TRUE;
}
- /* If the literal instruction is no longer needed (it may have been
- reused. We can eliminate it. */
- /* ??? For now, I don't want to deal with compacting the section,
- so just nop it out. */
- if (!lit_reused)
- {
- irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_relocs = true;
-
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
- info->contents + irel->r_offset);
- info->changed_contents = true;
- }
+ msec->flags = origflags;
}
- return irel + count;
+ /* Fall back on the generic ELF find_nearest_line routine. */
+
+ return _bfd_elf_find_nearest_line (abfd, symbols, section, offset,
+ filename_ptr, functionname_ptr,
+ line_ptr, discriminator_ptr);
}
+\f
+/* Structure used to pass information to alpha_elf_output_extsym. */
-static bfd_vma
-elf64_alpha_relax_opt_call (info, symval)
- struct alpha_relax_info *info;
- bfd_vma symval;
+struct extsym_info
{
- /* If the function has the same gp, and we can identify that the
- function does not use its function pointer, we can eliminate the
- address load. */
-
- /* If the symbol is marked NOPV, we are being told the function never
- needs its procedure value. */
- if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
- return symval;
+ bfd *abfd;
+ struct bfd_link_info *info;
+ struct ecoff_debug_info *debug;
+ const struct ecoff_debug_swap *swap;
+ bfd_boolean failed;
+};
- /* If the symbol is marked STD_GP, we are being told the function does
- a normal ldgp in the first two words. */
- else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
- ;
+static bfd_boolean
+elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, void * data)
+{
+ struct extsym_info *einfo = (struct extsym_info *) data;
+ bfd_boolean strip;
+ asection *sec, *output_section;
- /* Otherwise, we may be able to identify a GP load in the first two
- words, which we can then skip. */
+ if (h->root.indx == -2)
+ strip = FALSE;
+ else if ((h->root.def_dynamic
+ || h->root.ref_dynamic
+ || h->root.root.type == bfd_link_hash_new)
+ && !h->root.def_regular
+ && !h->root.ref_regular)
+ strip = TRUE;
+ else if (einfo->info->strip == strip_all
+ || (einfo->info->strip == strip_some
+ && bfd_hash_lookup (einfo->info->keep_hash,
+ h->root.root.root.string,
+ FALSE, FALSE) == NULL))
+ strip = TRUE;
else
+ strip = FALSE;
+
+ if (strip)
+ return TRUE;
+
+ if (h->esym.ifd == -2)
{
- Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
- bfd_vma ofs;
+ h->esym.jmptbl = 0;
+ h->esym.cobol_main = 0;
+ h->esym.weakext = 0;
+ h->esym.reserved = 0;
+ h->esym.ifd = ifdNil;
+ h->esym.asym.value = 0;
+ h->esym.asym.st = stGlobal;
- /* Load the relocations from the section that the target symbol is in. */
- if (info->sec == info->tsec)
- {
- tsec_relocs = info->relocs;
- tsec_relend = info->relend;
- tsec_free = NULL;
- }
+ if (h->root.root.type != bfd_link_hash_defined
+ && h->root.root.type != bfd_link_hash_defweak)
+ h->esym.asym.sc = scAbs;
else
{
- tsec_relocs = (_bfd_elf64_link_read_relocs
- (info->abfd, info->tsec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->link_info->keep_memory));
- if (tsec_relocs == NULL)
- return 0;
- tsec_relend = tsec_relocs + info->tsec->reloc_count;
- tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
- }
+ const char *name;
- /* Recover the symbol's offset within the section. */
- ofs = (symval - info->tsec->output_section->vma
- - info->tsec->output_offset);
+ sec = h->root.root.u.def.section;
+ output_section = sec->output_section;
- /* Look for a GPDISP reloc. */
- gpdisp = (elf64_alpha_find_reloc_at_ofs
- (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
+ /* When making a shared library and symbol h is the one from
+ the another shared library, OUTPUT_SECTION may be null. */
+ if (output_section == NULL)
+ h->esym.asym.sc = scUndefined;
+ else
+ {
+ name = bfd_section_name (output_section);
- if (!gpdisp || gpdisp->r_addend != 4)
- {
- if (tsec_free)
- free (tsec_free);
- return 0;
+ if (strcmp (name, ".text") == 0)
+ h->esym.asym.sc = scText;
+ else if (strcmp (name, ".data") == 0)
+ h->esym.asym.sc = scData;
+ else if (strcmp (name, ".sdata") == 0)
+ h->esym.asym.sc = scSData;
+ else if (strcmp (name, ".rodata") == 0
+ || strcmp (name, ".rdata") == 0)
+ h->esym.asym.sc = scRData;
+ else if (strcmp (name, ".bss") == 0)
+ h->esym.asym.sc = scBss;
+ else if (strcmp (name, ".sbss") == 0)
+ h->esym.asym.sc = scSBss;
+ else if (strcmp (name, ".init") == 0)
+ h->esym.asym.sc = scInit;
+ else if (strcmp (name, ".fini") == 0)
+ h->esym.asym.sc = scFini;
+ else
+ h->esym.asym.sc = scAbs;
+ }
}
- if (tsec_free)
- free (tsec_free);
+
+ h->esym.asym.reserved = 0;
+ h->esym.asym.index = indexNil;
}
- /* We've now determined that we can skip an initial gp load. Verify
- that the call and the target use the same gp. */
- if (info->link_info->hash->creator != info->tsec->owner->xvec
- || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
- return 0;
+ if (h->root.root.type == bfd_link_hash_common)
+ h->esym.asym.value = h->root.root.u.c.size;
+ else if (h->root.root.type == bfd_link_hash_defined
+ || h->root.root.type == bfd_link_hash_defweak)
+ {
+ if (h->esym.asym.sc == scCommon)
+ h->esym.asym.sc = scBss;
+ else if (h->esym.asym.sc == scSCommon)
+ h->esym.asym.sc = scSBss;
- return symval + 8;
+ sec = h->root.root.u.def.section;
+ output_section = sec->output_section;
+ if (output_section != NULL)
+ h->esym.asym.value = (h->root.root.u.def.value
+ + sec->output_offset
+ + output_section->vma);
+ else
+ h->esym.asym.value = 0;
+ }
+
+ if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
+ h->root.root.root.string,
+ &h->esym))
+ {
+ einfo->failed = TRUE;
+ return FALSE;
+ }
+
+ return TRUE;
}
+\f
+/* Search for and possibly create a got entry. */
-static boolean
-elf64_alpha_relax_without_lituse (info, symval, irel)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
+static struct alpha_elf_got_entry *
+get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h,
+ unsigned long r_type, unsigned long r_symndx,
+ bfd_vma r_addend)
{
- unsigned int insn;
- bfd_signed_vma disp;
-
- /* Get the instruction. */
- insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
+ struct alpha_elf_got_entry *gotent;
+ struct alpha_elf_got_entry **slot;
- if (insn >> 26 != OP_LDQ)
+ if (h)
+ slot = &h->got_entries;
+ else
{
- ((*_bfd_error_handler)
- ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
- bfd_archive_filename (info->abfd), info->sec->name,
- (unsigned long) irel->r_offset));
- return true;
- }
+ /* This is a local .got entry -- record for merge. */
- /* So we aren't told much. Do what we can with the address load and
- fake the rest. All of the optimizations here require that the
- offset from the GP fit in 16 bits. */
+ struct alpha_elf_got_entry **local_got_entries;
- disp = symval - info->gp;
- if (disp < -0x8000 || disp >= 0x8000)
- return true;
+ local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
+ if (!local_got_entries)
+ {
+ bfd_size_type size;
+ Elf_Internal_Shdr *symtab_hdr;
- /* On the LITERAL instruction itself, consider exchanging
- `ldq R,X(gp)' for `lda R,Y(gp)'. */
+ symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
+ size = symtab_hdr->sh_info;
+ size *= sizeof (struct alpha_elf_got_entry *);
- insn = (OP_LDA << 26) | (insn & 0x03ff0000);
- bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
- info->changed_contents = true;
+ local_got_entries
+ = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
+ if (!local_got_entries)
+ return NULL;
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPREL16);
- info->changed_relocs = true;
+ alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
+ }
- /* Reduce the use count on this got entry by one, possibly
- eliminating it. */
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (info->gotent->reloc_type);
- alpha_elf_tdata (info->gotent->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotent->gotobj)->local_got_size -= sz;
+ slot = &local_got_entries[r_symndx];
}
- /* ??? Search forward through this basic block looking for insns
- that use the target register. Stop after an insn modifying the
- register is seen, or after a branch or call.
+ for (gotent = *slot; gotent ; gotent = gotent->next)
+ if (gotent->gotobj == abfd
+ && gotent->reloc_type == r_type
+ && gotent->addend == r_addend)
+ break;
- Any such memory load insn may be substituted by a load directly
- off the GP. This allows the memory load insn to be issued before
- the calculated GP register would otherwise be ready.
+ if (!gotent)
+ {
+ int entry_size;
+ bfd_size_type amt;
- Any such jsr insn can be replaced by a bsr if it is in range.
+ amt = sizeof (struct alpha_elf_got_entry);
+ gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
+ if (!gotent)
+ return NULL;
- This would mean that we'd have to _add_ relocations, the pain of
- which gives one pause. */
+ gotent->gotobj = abfd;
+ gotent->addend = r_addend;
+ gotent->got_offset = -1;
+ gotent->plt_offset = -1;
+ gotent->use_count = 1;
+ gotent->reloc_type = r_type;
+ gotent->reloc_done = 0;
+ gotent->reloc_xlated = 0;
+
+ gotent->next = *slot;
+ *slot = gotent;
+
+ entry_size = alpha_got_entry_size (r_type);
+ alpha_elf_tdata (abfd)->total_got_size += entry_size;
+ if (!h)
+ alpha_elf_tdata(abfd)->local_got_size += entry_size;
+ }
+ else
+ gotent->use_count += 1;
+
+ return gotent;
+}
+
+static bfd_boolean
+elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah)
+{
+ return ((ah->root.type == STT_FUNC
+ || ah->root.root.type == bfd_link_hash_undefweak
+ || ah->root.root.type == bfd_link_hash_undefined)
+ && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0
+ && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0);
+}
- return true;
+/* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
+ Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE
+ as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
+ relocs to be sorted. */
+
+static bfd_boolean
+elf64_alpha_sort_relocs_p (asection *sec)
+{
+ return (sec->flags & SEC_CODE) == 0;
}
-static boolean
-elf64_alpha_relax_section (abfd, sec, link_info, again)
- bfd *abfd;
- asection *sec;
- struct bfd_link_info *link_info;
- boolean *again;
+
+/* Handle dynamic relocations when doing an Alpha ELF link. */
+
+static bfd_boolean
+elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, const Elf_Internal_Rela *relocs)
{
+ bfd *dynobj;
+ asection *sreloc;
Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *shndx_hdr;
- Elf_Internal_Rela *internal_relocs;
- Elf_Internal_Rela *free_relocs = NULL;
- Elf_Internal_Rela *irel, *irelend;
- bfd_byte *free_contents = NULL;
- Elf64_External_Sym *extsyms = NULL;
- Elf64_External_Sym *free_extsyms = NULL;
- Elf_External_Sym_Shndx *shndx_buf = NULL;
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_relax_info info;
+ struct alpha_elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel, *relend;
+ bfd_size_type amt;
- /* We are not currently changing any sizes, so only one pass. */
- *again = false;
+ if (bfd_link_relocatable (info))
+ return TRUE;
- if (link_info->relocateable
- || (sec->flags & SEC_RELOC) == 0
- || sec->reloc_count == 0)
- return true;
+ /* Don't do anything special with non-loaded, non-alloced sections.
+ In particular, any relocs in such sections should not affect GOT
+ and PLT reference counting (ie. we don't allow them to create GOT
+ or PLT entries), there's no possibility or desire to optimize TLS
+ relocs, and there's not much point in propagating relocs to shared
+ libs that the dynamic linker won't relocate. */
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
- /* If this is the first time we have been called for this section,
- initialize the cooked size. */
- if (sec->_cooked_size == 0)
- sec->_cooked_size = sec->_raw_size;
+ BFD_ASSERT (is_alpha_elf (abfd));
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ elf_hash_table (info)->dynobj = dynobj = abfd;
- /* Load the relocations for this section. */
- internal_relocs = (_bfd_elf64_link_read_relocs
- (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
- link_info->keep_memory));
- if (internal_relocs == NULL)
- goto error_return;
- if (! link_info->keep_memory)
- free_relocs = internal_relocs;
+ sreloc = NULL;
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ sym_hashes = alpha_elf_sym_hashes (abfd);
+
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; ++rel)
+ {
+ enum {
+ NEED_GOT = 1,
+ NEED_GOT_ENTRY = 2,
+ NEED_DYNREL = 4
+ };
+
+ unsigned long r_symndx, r_type;
+ struct alpha_elf_link_hash_entry *h;
+ unsigned int gotent_flags;
+ bfd_boolean maybe_dynamic;
+ unsigned int need;
+ bfd_vma addend;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+
+ /* PR15323, ref flags aren't set for references in the same
+ object. */
+ h->root.ref_regular = 1;
+ }
+
+ /* We can only get preliminary data on whether a symbol is
+ locally or externally defined, as not all of the input files
+ have yet been processed. Do something with what we know, as
+ this may help reduce memory usage and processing time later. */
+ maybe_dynamic = FALSE;
+ if (h && ((bfd_link_pic (info)
+ && (!info->symbolic
+ || info->unresolved_syms_in_shared_libs == RM_IGNORE))
+ || !h->root.def_regular
+ || h->root.root.type == bfd_link_hash_defweak))
+ maybe_dynamic = TRUE;
+
+ need = 0;
+ gotent_flags = 0;
+ r_type = ELF64_R_TYPE (rel->r_info);
+ addend = rel->r_addend;
+
+ switch (r_type)
+ {
+ case R_ALPHA_LITERAL:
+ need = NEED_GOT | NEED_GOT_ENTRY;
+
+ /* Remember how this literal is used from its LITUSEs.
+ This will be important when it comes to decide if we can
+ create a .plt entry for a function symbol. */
+ while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
+ if (rel->r_addend >= 1 && rel->r_addend <= 6)
+ gotent_flags |= 1 << rel->r_addend;
+ --rel;
+
+ /* No LITUSEs -- presumably the address is used somehow. */
+ if (gotent_flags == 0)
+ gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
+ break;
+
+ case R_ALPHA_GPDISP:
+ case R_ALPHA_GPREL16:
+ case R_ALPHA_GPREL32:
+ case R_ALPHA_GPRELHIGH:
+ case R_ALPHA_GPRELLOW:
+ case R_ALPHA_BRSGP:
+ need = NEED_GOT;
+ break;
- memset(&info, 0, sizeof (info));
- info.abfd = abfd;
- info.sec = sec;
- info.link_info = link_info;
- info.relocs = internal_relocs;
- info.relend = irelend = internal_relocs + sec->reloc_count;
+ case R_ALPHA_REFLONG:
+ case R_ALPHA_REFQUAD:
+ if (bfd_link_pic (info) || maybe_dynamic)
+ need = NEED_DYNREL;
+ break;
- /* Find the GP for this object. Do not store the result back via
- _bfd_set_gp_value, since this could change again before final. */
- info.gotobj = alpha_elf_tdata (abfd)->gotobj;
- if (info.gotobj)
- {
- asection *sgot = alpha_elf_tdata (info.gotobj)->got;
- info.gp = (sgot->output_section->vma
- + sgot->output_offset
- + 0x8000);
- }
+ case R_ALPHA_TLSLDM:
+ /* The symbol for a TLSLDM reloc is ignored. Collapse the
+ reloc to the STN_UNDEF (0) symbol so that they all match. */
+ r_symndx = STN_UNDEF;
+ h = 0;
+ maybe_dynamic = FALSE;
+ /* FALLTHRU */
- for (irel = internal_relocs; irel < irelend; irel++)
- {
- bfd_vma symval;
- Elf_Internal_Sym isym;
- struct alpha_elf_got_entry *gotent;
+ case R_ALPHA_TLSGD:
+ case R_ALPHA_GOTDTPREL:
+ need = NEED_GOT | NEED_GOT_ENTRY;
+ break;
- if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL)
- continue;
+ case R_ALPHA_GOTTPREL:
+ need = NEED_GOT | NEED_GOT_ENTRY;
+ gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
+ if (bfd_link_pic (info))
+ info->flags |= DF_STATIC_TLS;
+ break;
- /* Get the section contents. */
- if (info.contents == NULL)
- {
- if (elf_section_data (sec)->this_hdr.contents != NULL)
- info.contents = elf_section_data (sec)->this_hdr.contents;
- else
+ case R_ALPHA_TPREL64:
+ if (bfd_link_dll (info))
{
- info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
- if (info.contents == NULL)
- goto error_return;
- free_contents = info.contents;
-
- if (! bfd_get_section_contents (abfd, sec, info.contents,
- (file_ptr) 0, sec->_raw_size))
- goto error_return;
+ info->flags |= DF_STATIC_TLS;
+ need = NEED_DYNREL;
}
+ else if (maybe_dynamic)
+ need = NEED_DYNREL;
+ break;
}
- /* Read this BFD's symbols if we haven't done so already. */
- if (extsyms == NULL)
+ if (need & NEED_GOT)
{
- bfd_size_type amt;
-
- if (symtab_hdr->contents != NULL)
- extsyms = (Elf64_External_Sym *) symtab_hdr->contents;
- else
- {
- amt = symtab_hdr->sh_info;
- amt *= sizeof (Elf64_External_Sym);
- extsyms = (Elf64_External_Sym *) bfd_malloc (amt);
- if (extsyms == NULL)
- goto error_return;
- free_extsyms = extsyms;
- if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread ((PTR) extsyms, amt, abfd) != amt)
- goto error_return;
- }
-
- shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
- if (shndx_hdr->sh_size != 0)
+ if (alpha_elf_tdata(abfd)->gotobj == NULL)
{
- amt = symtab_hdr->sh_info;
- amt *= sizeof (Elf_External_Sym_Shndx);
- shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (shndx_buf == NULL)
- goto error_return;
- if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
- goto error_return;
+ if (!elf64_alpha_create_got_section (abfd, info))
+ return FALSE;
}
}
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ if (need & NEED_GOT_ENTRY)
{
- /* A local symbol. */
- Elf64_External_Sym *esym;
- Elf_External_Sym_Shndx *shndx;
-
- esym = extsyms + ELF64_R_SYM (irel->r_info);
- shndx = shndx_buf + (shndx_buf ? ELF64_R_SYM (irel->r_info) : 0);
- bfd_elf64_swap_symbol_in (abfd, esym, shndx, &isym);
- if (isym.st_shndx == SHN_UNDEF)
- info.tsec = bfd_und_section_ptr;
- else if (isym.st_shndx == SHN_ABS)
- info.tsec = bfd_abs_section_ptr;
- else if (isym.st_shndx == SHN_COMMON)
- info.tsec = bfd_com_section_ptr;
- else
- info.tsec = bfd_section_from_elf_index (abfd, isym.st_shndx);
+ struct alpha_elf_got_entry *gotent;
- info.h = NULL;
- info.other = isym.st_other;
- gotent = local_got_entries[ELF64_R_SYM(irel->r_info)];
- symval = isym.st_value;
- }
- else
- {
- unsigned long indx;
- struct alpha_elf_link_hash_entry *h;
+ gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
+ if (!gotent)
+ return FALSE;
- indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info;
- h = alpha_elf_sym_hashes (abfd)[indx];
- BFD_ASSERT (h != NULL);
+ if (gotent_flags)
+ {
+ gotent->flags |= gotent_flags;
+ if (h)
+ {
+ gotent_flags |= h->flags;
+ h->flags = gotent_flags;
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ /* Make a guess as to whether a .plt entry is needed. */
+ /* ??? It appears that we won't make it into
+ adjust_dynamic_symbol for symbols that remain
+ totally undefined. Copying this check here means
+ we can create a plt entry for them too. */
+ h->root.needs_plt
+ = (maybe_dynamic && elf64_alpha_want_plt (h));
+ }
+ }
+ }
- /* We can't do anthing with undefined or dynamic symbols. */
- if (h->root.root.type == bfd_link_hash_undefined
- || h->root.root.type == bfd_link_hash_undefweak
- || alpha_elf_dynamic_symbol_p (&h->root, link_info))
- continue;
+ if (need & NEED_DYNREL)
+ {
+ /* We need to create the section here now whether we eventually
+ use it or not so that it gets mapped to an output section by
+ the linker. If not used, we'll kill it in size_dynamic_sections. */
+ if (sreloc == NULL)
+ {
+ sreloc = _bfd_elf_make_dynamic_reloc_section
+ (sec, dynobj, 3, abfd, /*rela?*/ TRUE);
- info.h = h;
- info.tsec = h->root.root.u.def.section;
- info.other = h->root.other;
- gotent = h->got_entries;
- symval = h->root.root.u.def.value;
- }
+ if (sreloc == NULL)
+ return FALSE;
+ }
- /* Search for the got entry to be used by this relocation. */
- while (gotent->gotobj != info.gotobj || gotent->addend != irel->r_addend)
- gotent = gotent->next;
- info.gotent = gotent;
+ if (h)
+ {
+ /* Since we havn't seen all of the input symbols yet, we
+ don't know whether we'll actually need a dynamic relocation
+ entry for this reloc. So make a record of it. Once we
+ find out if this thing needs dynamic relocation we'll
+ expand the relocation sections by the appropriate amount. */
- symval += info.tsec->output_section->vma + info.tsec->output_offset;
- symval += irel->r_addend;
+ struct alpha_elf_reloc_entry *rent;
+
+ for (rent = h->reloc_entries; rent; rent = rent->next)
+ if (rent->rtype == r_type && rent->srel == sreloc)
+ break;
- BFD_ASSERT(info.gotent != NULL);
+ if (!rent)
+ {
+ amt = sizeof (struct alpha_elf_reloc_entry);
+ rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
+ if (!rent)
+ return FALSE;
- /* If there exist LITUSE relocations immediately following, this
- opens up all sorts of interesting optimizations, because we
- now know every location that this address load is used. */
+ rent->srel = sreloc;
+ rent->rtype = r_type;
+ rent->count = 1;
+ rent->reltext = (sec->flags & SEC_READONLY) != 0;
- if (irel+1 < irelend && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
- {
- irel = elf64_alpha_relax_with_lituse (&info, symval, irel, irelend);
- if (irel == NULL)
- goto error_return;
- }
- else
- {
- if (!elf64_alpha_relax_without_lituse (&info, symval, irel))
- goto error_return;
+ rent->next = h->reloc_entries;
+ h->reloc_entries = rent;
+ }
+ else
+ rent->count++;
+ }
+ else if (bfd_link_pic (info))
+ {
+ /* If this is a shared library, and the section is to be
+ loaded into memory, we need a RELATIVE reloc. */
+ sreloc->size += sizeof (Elf64_External_Rela);
+ if (sec->flags & SEC_READONLY)
+ info->flags |= DF_TEXTREL;
+ }
}
}
- if (!elf64_alpha_size_got_sections (abfd, link_info))
- return false;
+ return TRUE;
+}
- if (info.changed_relocs)
- {
- elf_section_data (sec)->relocs = internal_relocs;
- }
- else if (free_relocs != NULL)
- {
- free (free_relocs);
- }
+/* Return the section that should be marked against GC for a given
+ relocation. */
- if (info.changed_contents)
- {
- elf_section_data (sec)->this_hdr.contents = info.contents;
- }
- else if (free_contents != NULL)
+static asection *
+elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)
+{
+ /* These relocations don't really reference a symbol. Instead we store
+ extra data in their addend slot. Ignore the symbol. */
+ switch (ELF64_R_TYPE (rel->r_info))
{
- if (! link_info->keep_memory)
- free (free_contents);
- else
- {
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = info.contents;
- }
+ case R_ALPHA_LITUSE:
+ case R_ALPHA_GPDISP:
+ case R_ALPHA_HINT:
+ return NULL;
}
- if (shndx_buf != NULL)
- free (shndx_buf);
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
+}
+
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. The current definition is in some section of the
+ dynamic object, but we're not including those sections. We have to
+ change the definition to something the rest of the link can
+ understand. */
+
+static bfd_boolean
+elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
+{
+ bfd *dynobj;
+ asection *s;
+ struct alpha_elf_link_hash_entry *ah;
- if (free_extsyms != NULL)
+ dynobj = elf_hash_table(info)->dynobj;
+ ah = (struct alpha_elf_link_hash_entry *)h;
+
+ /* Now that we've seen all of the input symbols, finalize our decision
+ about whether this symbol should get a .plt entry. Irritatingly, it
+ is common for folk to leave undefined symbols in shared libraries,
+ and they still expect lazy binding; accept undefined symbols in lieu
+ of STT_FUNC. */
+ if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah))
{
- if (! link_info->keep_memory)
- free (free_extsyms);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) extsyms;
- }
+ h->needs_plt = TRUE;
+
+ s = elf_hash_table(info)->splt;
+ if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
+ return FALSE;
+
+ /* We need one plt entry per got subsection. Delay allocation of
+ the actual plt entries until size_plt_section, called from
+ size_dynamic_sections or during relaxation. */
+
+ return TRUE;
}
+ else
+ h->needs_plt = FALSE;
- *again = info.changed_contents || info.changed_relocs;
+ /* If this is a weak symbol, and there is a real definition, the
+ processor independent code will have arranged for us to see the
+ real definition first, and we can just use the same value. */
+ if (h->is_weakalias)
+ {
+ struct elf_link_hash_entry *def = weakdef (h);
+ BFD_ASSERT (def->root.type == bfd_link_hash_defined);
+ h->root.u.def.section = def->root.u.def.section;
+ h->root.u.def.value = def->root.u.def.value;
+ return TRUE;
+ }
- return true;
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. The Alpha, since it uses .got entries for all
+ symbols even in regular objects, does not need the hackery of a
+ .dynbss section and COPY dynamic relocations. */
- error_return:
- if (free_relocs != NULL)
- free (free_relocs);
- if (free_contents != NULL)
- free (free_contents);
- if (shndx_buf != NULL)
- free (shndx_buf);
- if (free_extsyms != NULL)
- free (free_extsyms);
- return false;
+ return TRUE;
}
-\f
-/* PLT/GOT Stuff */
-#define PLT_HEADER_SIZE 32
-#define PLT_HEADER_WORD1 (bfd_vma) 0xc3600000 /* br $27,.+4 */
-#define PLT_HEADER_WORD2 (bfd_vma) 0xa77b000c /* ldq $27,12($27) */
-#define PLT_HEADER_WORD3 (bfd_vma) 0x47ff041f /* nop */
-#define PLT_HEADER_WORD4 (bfd_vma) 0x6b7b0000 /* jmp $27,($27) */
-#define PLT_ENTRY_SIZE 12
-#define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */
-#define PLT_ENTRY_WORD2 0
-#define PLT_ENTRY_WORD3 0
+/* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
-#define MAX_GOT_SIZE (64*1024)
+static void
+elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h,
+ const Elf_Internal_Sym *isym,
+ bfd_boolean definition,
+ bfd_boolean dynamic)
+{
+ if (!dynamic && definition)
+ h->other = ((h->other & ELF_ST_VISIBILITY (-1))
+ | (isym->st_other & ~ELF_ST_VISIBILITY (-1)));
+}
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
-\f
-/* Handle an Alpha specific section when reading an object file. This
- is called when elfcode.h finds a section with an unknown type.
- FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
- how to. */
+/* Symbol versioning can create new symbols, and make our old symbols
+ indirect to the new ones. Consolidate the got and reloc information
+ in these situations. */
-static boolean
-elf64_alpha_section_from_shdr (abfd, hdr, name)
- bfd *abfd;
- Elf64_Internal_Shdr *hdr;
- char *name;
+static void
+elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
{
- asection *newsect;
+ struct alpha_elf_link_hash_entry *hi
+ = (struct alpha_elf_link_hash_entry *) ind;
+ struct alpha_elf_link_hash_entry *hs
+ = (struct alpha_elf_link_hash_entry *) dir;
- /* There ought to be a place to keep ELF backend specific flags, but
- at the moment there isn't one. We just keep track of the
- sections by their name, instead. Fortunately, the ABI gives
- suggested names for all the MIPS specific sections, so we will
- probably get away with this. */
- switch (hdr->sh_type)
+ /* Do the merging in the superclass. */
+ _bfd_elf_link_hash_copy_indirect(info, dir, ind);
+
+ /* Merge the flags. Whee. */
+ hs->flags |= hi->flags;
+
+ /* ??? It's unclear to me what's really supposed to happen when
+ "merging" defweak and defined symbols, given that we don't
+ actually throw away the defweak. This more-or-less copies
+ the logic related to got and plt entries in the superclass. */
+ if (ind->root.type != bfd_link_hash_indirect)
+ return;
+
+ /* Merge the .got entries. Cannibalize the old symbol's list in
+ doing so, since we don't need it anymore. */
+
+ if (hs->got_entries == NULL)
+ hs->got_entries = hi->got_entries;
+ else
{
- case SHT_ALPHA_DEBUG:
- if (strcmp (name, ".mdebug") != 0)
- return false;
- break;
- default:
- return false;
+ struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
+
+ gsh = hs->got_entries;
+ for (gi = hi->got_entries; gi ; gi = gin)
+ {
+ gin = gi->next;
+ for (gs = gsh; gs ; gs = gs->next)
+ if (gi->gotobj == gs->gotobj
+ && gi->reloc_type == gs->reloc_type
+ && gi->addend == gs->addend)
+ {
+ gs->use_count += gi->use_count;
+ goto got_found;
+ }
+ gi->next = hs->got_entries;
+ hs->got_entries = gi;
+ got_found:;
+ }
}
+ hi->got_entries = NULL;
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
- newsect = hdr->bfd_section;
+ /* And similar for the reloc entries. */
- if (hdr->sh_type == SHT_ALPHA_DEBUG)
+ if (hs->reloc_entries == NULL)
+ hs->reloc_entries = hi->reloc_entries;
+ else
{
- if (! bfd_set_section_flags (abfd, newsect,
- (bfd_get_section_flags (abfd, newsect)
- | SEC_DEBUGGING)))
- return false;
+ struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
+
+ rsh = hs->reloc_entries;
+ for (ri = hi->reloc_entries; ri ; ri = rin)
+ {
+ rin = ri->next;
+ for (rs = rsh; rs ; rs = rs->next)
+ if (ri->rtype == rs->rtype && ri->srel == rs->srel)
+ {
+ rs->count += ri->count;
+ goto found_reloc;
+ }
+ ri->next = hs->reloc_entries;
+ hs->reloc_entries = ri;
+ found_reloc:;
+ }
}
-
- return true;
+ hi->reloc_entries = NULL;
}
-/* Convert Alpha specific section flags to bfd internal section flags. */
+/* Is it possible to merge two object file's .got tables? */
-static boolean
-elf64_alpha_section_flags (flags, hdr)
- flagword *flags;
- Elf64_Internal_Shdr *hdr;
+static bfd_boolean
+elf64_alpha_can_merge_gots (bfd *a, bfd *b)
{
- if (hdr->sh_flags & SHF_ALPHA_GPREL)
- *flags |= SEC_SMALL_DATA;
-
- return true;
-}
-
-/* Set the correct type for an Alpha ELF section. We do this by the
- section name, which is a hack, but ought to work. */
+ int total = alpha_elf_tdata (a)->total_got_size;
+ bfd *bsub;
-static boolean
-elf64_alpha_fake_sections (abfd, hdr, sec)
- bfd *abfd;
- Elf64_Internal_Shdr *hdr;
- asection *sec;
-{
- register const char *name;
+ /* Trivial quick fallout test. */
+ if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
+ return TRUE;
- name = bfd_get_section_name (abfd, sec);
+ /* By their nature, local .got entries cannot be merged. */
+ if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
+ return FALSE;
- if (strcmp (name, ".mdebug") == 0)
+ /* Failing the common trivial comparison, we must effectively
+ perform the merge. Not actually performing the merge means that
+ we don't have to store undo information in case we fail. */
+ for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
{
- hdr->sh_type = SHT_ALPHA_DEBUG;
- /* In a shared object on Irix 5.3, the .mdebug section has an
- entsize of 0. FIXME: Does this matter? */
- if ((abfd->flags & DYNAMIC) != 0 )
- hdr->sh_entsize = 0;
- else
- hdr->sh_entsize = 1;
- }
- else if ((sec->flags & SEC_SMALL_DATA)
- || strcmp (name, ".sdata") == 0
- || strcmp (name, ".sbss") == 0
- || strcmp (name, ".lit4") == 0
- || strcmp (name, ".lit8") == 0)
- hdr->sh_flags |= SHF_ALPHA_GPREL;
+ struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
+ Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
+ int i, n;
- return true;
-}
+ n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ae, *be;
+ struct alpha_elf_link_hash_entry *h;
-/* Hook called by the linker routine which adds symbols from an object
- file. We use it to put .comm items in .sbss, and not .bss. */
+ h = hashes[i];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
-static boolean
-elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
- bfd *abfd;
- struct bfd_link_info *info;
- const Elf_Internal_Sym *sym;
- const char **namep ATTRIBUTE_UNUSED;
- flagword *flagsp ATTRIBUTE_UNUSED;
- asection **secp;
- bfd_vma *valp;
-{
- if (sym->st_shndx == SHN_COMMON
- && !info->relocateable
- && sym->st_size <= elf_gp_size (abfd))
- {
- /* Common symbols less than or equal to -G nn bytes are
- automatically put into .sbss. */
+ for (be = h->got_entries; be ; be = be->next)
+ {
+ if (be->use_count == 0)
+ continue;
+ if (be->gotobj != b)
+ continue;
- asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
+ for (ae = h->got_entries; ae ; ae = ae->next)
+ if (ae->gotobj == a
+ && ae->reloc_type == be->reloc_type
+ && ae->addend == be->addend)
+ goto global_found;
- if (scomm == NULL)
- {
- scomm = bfd_make_section (abfd, ".scommon");
- if (scomm == NULL
- || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
- | SEC_IS_COMMON
- | SEC_LINKER_CREATED)))
- return false;
+ total += alpha_got_entry_size (be->reloc_type);
+ if (total > MAX_GOT_SIZE)
+ return FALSE;
+ global_found:;
+ }
}
-
- *secp = scomm;
- *valp = sym->st_size;
}
- return true;
+ return TRUE;
}
-/* Create the .got section. */
+/* Actually merge two .got tables. */
-static boolean
-elf64_alpha_create_got_section(abfd, info)
- bfd *abfd;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
+static void
+elf64_alpha_merge_gots (bfd *a, bfd *b)
{
- asection *s;
-
- if (bfd_get_section_by_name (abfd, ".got"))
- return true;
-
- s = bfd_make_section (abfd, ".got");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED))
- || !bfd_set_section_alignment (abfd, s, 3))
- return false;
+ int total = alpha_elf_tdata (a)->total_got_size;
+ bfd *bsub;
- alpha_elf_tdata (abfd)->got = s;
+ /* Remember local expansion. */
+ {
+ int e = alpha_elf_tdata (b)->local_got_size;
+ total += e;
+ alpha_elf_tdata (a)->local_got_size += e;
+ }
- return true;
-}
+ for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ {
+ struct alpha_elf_got_entry **local_got_entries;
+ struct alpha_elf_link_hash_entry **hashes;
+ Elf_Internal_Shdr *symtab_hdr;
+ int i, n;
-/* Create all the dynamic sections. */
+ /* Let the local .got entries know they are part of a new subsegment. */
+ local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
+ if (local_got_entries)
+ {
+ n = elf_tdata (bsub)->symtab_hdr.sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ent;
+ for (ent = local_got_entries[i]; ent; ent = ent->next)
+ ent->gotobj = a;
+ }
+ }
-static boolean
-elf64_alpha_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- asection *s;
- struct elf_link_hash_entry *h;
+ /* Merge the global .got entries. */
+ hashes = alpha_elf_sym_hashes (bsub);
+ symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
+ n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ae, *be, **pbe, **start;
+ struct alpha_elf_link_hash_entry *h;
- s = bfd_make_section (abfd, ".plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_CODE))
- || ! bfd_set_section_alignment (abfd, s, 3))
- return false;
+ h = hashes[i];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
- .plt section. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
- (bfd_vma) 0, (const char *) NULL, false,
- get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
-
- s = bfd_make_section (abfd, ".rela.plt");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY))
- || ! bfd_set_section_alignment (abfd, s, 3))
- return false;
+ pbe = start = &h->got_entries;
+ while ((be = *pbe) != NULL)
+ {
+ if (be->use_count == 0)
+ {
+ *pbe = be->next;
+ memset (be, 0xa5, sizeof (*be));
+ goto kill;
+ }
+ if (be->gotobj != b)
+ goto next;
- /* We may or may not have created a .got section for this object, but
- we definitely havn't done the rest of the work. */
+ for (ae = *start; ae ; ae = ae->next)
+ if (ae->gotobj == a
+ && ae->reloc_type == be->reloc_type
+ && ae->addend == be->addend)
+ {
+ ae->flags |= be->flags;
+ ae->use_count += be->use_count;
+ *pbe = be->next;
+ memset (be, 0xa5, sizeof (*be));
+ goto kill;
+ }
+ be->gotobj = a;
+ total += alpha_got_entry_size (be->reloc_type);
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
+ next:;
+ pbe = &be->next;
+ kill:;
+ }
+ }
- s = bfd_make_section(abfd, ".rela.got");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY))
- || !bfd_set_section_alignment (abfd, s, 3))
- return false;
+ alpha_elf_tdata (bsub)->gotobj = a;
+ }
+ alpha_elf_tdata (a)->total_got_size = total;
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
- dynobj's .got section. We don't do this in the linker script
- because we don't want to define the symbol if we are not creating
- a global offset table. */
- h = NULL;
- if (!(_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
- alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
- false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
+ /* Merge the two in_got chains. */
+ {
+ bfd *next;
- elf_hash_table (info)->hgot = h;
+ bsub = a;
+ while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
+ bsub = next;
- return true;
+ alpha_elf_tdata (bsub)->in_got_link_next = b;
+ }
}
-\f
-/* Read ECOFF debugging information from a .mdebug section into a
- ecoff_debug_info structure. */
-
-static boolean
-elf64_alpha_read_ecoff_info (abfd, section, debug)
- bfd *abfd;
- asection *section;
- struct ecoff_debug_info *debug;
-{
- HDRR *symhdr;
- const struct ecoff_debug_swap *swap;
- char *ext_hdr = NULL;
- swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- memset (debug, 0, sizeof (*debug));
+/* Calculate the offsets for the got entries. */
- ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
- if (ext_hdr == NULL && swap->external_hdr_size != 0)
- goto error_return;
+static bfd_boolean
+elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
+ void * arg ATTRIBUTE_UNUSED)
+{
+ struct alpha_elf_got_entry *gotent;
- if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
- swap->external_hdr_size)
- == false)
- goto error_return;
+ for (gotent = h->got_entries; gotent; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ {
+ struct alpha_elf_obj_tdata *td;
+ bfd_size_type *plge;
- symhdr = &debug->symbolic_header;
- (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
+ td = alpha_elf_tdata (gotent->gotobj);
+ plge = &td->got->size;
+ gotent->got_offset = *plge;
+ *plge += alpha_got_entry_size (gotent->reloc_type);
+ }
- /* The symbolic header contains absolute file offsets and sizes to
- read. */
-#define READ(ptr, offset, count, size, type) \
- if (symhdr->count == 0) \
- debug->ptr = NULL; \
- else \
- { \
- bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
- debug->ptr = (type) bfd_malloc (amt); \
- if (debug->ptr == NULL) \
- goto error_return; \
- if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
- || bfd_bread (debug->ptr, amt, abfd) != amt) \
- goto error_return; \
- }
+ return TRUE;
+}
- READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
- READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
- READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
- READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
- READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
- READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
- union aux_ext *);
- READ (ss, cbSsOffset, issMax, sizeof (char), char *);
- READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
- READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
- READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
- READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
-#undef READ
+static void
+elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
+{
+ bfd *i, *got_list;
+ struct alpha_elf_link_hash_table * htab;
- debug->fdr = NULL;
- debug->adjust = NULL;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
+ got_list = htab->got_list;
- return true;
+ /* First, zero out the .got sizes, as we may be recalculating the
+ .got after optimizing it. */
+ for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
+ alpha_elf_tdata(i)->got->size = 0;
- error_return:
- if (ext_hdr != NULL)
- free (ext_hdr);
- if (debug->line != NULL)
- free (debug->line);
- if (debug->external_dnr != NULL)
- free (debug->external_dnr);
- if (debug->external_pdr != NULL)
- free (debug->external_pdr);
- if (debug->external_sym != NULL)
- free (debug->external_sym);
- if (debug->external_opt != NULL)
- free (debug->external_opt);
- if (debug->external_aux != NULL)
- free (debug->external_aux);
- if (debug->ss != NULL)
- free (debug->ss);
- if (debug->ssext != NULL)
- free (debug->ssext);
- if (debug->external_fdr != NULL)
- free (debug->external_fdr);
- if (debug->external_rfd != NULL)
- free (debug->external_rfd);
- if (debug->external_ext != NULL)
- free (debug->external_ext);
- return false;
-}
+ /* Next, fill in the offsets for all the global entries. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_calc_got_offsets_for_symbol,
+ NULL);
-/* Alpha ELF local labels start with '$'. */
+ /* Finally, fill in the offsets for the local entries. */
+ for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
+ {
+ bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
+ bfd *j;
-static boolean
-elf64_alpha_is_local_label_name (abfd, name)
- bfd *abfd ATTRIBUTE_UNUSED;
- const char *name;
-{
- return name[0] == '$';
-}
+ for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
+ {
+ struct alpha_elf_got_entry **local_got_entries, *gotent;
+ int k, n;
-/* Alpha ELF follows MIPS ELF in using a special find_nearest_line
- routine in order to handle the ECOFF debugging information. We
- still call this mips_elf_find_line because of the slot
- find_line_info in elf_obj_tdata is declared that way. */
+ local_got_entries = alpha_elf_tdata(j)->local_got_entries;
+ if (!local_got_entries)
+ continue;
-struct mips_elf_find_line
-{
- struct ecoff_debug_info d;
- struct ecoff_find_line i;
-};
+ for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
+ for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ {
+ gotent->got_offset = got_offset;
+ got_offset += alpha_got_entry_size (gotent->reloc_type);
+ }
+ }
+
+ alpha_elf_tdata(i)->got->size = got_offset;
+ }
+}
+
+/* Constructs the gots. */
-static boolean
-elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
- functionname_ptr, line_ptr)
- bfd *abfd;
- asection *section;
- asymbol **symbols;
- bfd_vma offset;
- const char **filename_ptr;
- const char **functionname_ptr;
- unsigned int *line_ptr;
+static bfd_boolean
+elf64_alpha_size_got_sections (struct bfd_link_info *info,
+ bfd_boolean may_merge)
{
- asection *msec;
+ bfd *i, *got_list, *cur_got_obj = NULL;
+ struct alpha_elf_link_hash_table * htab;
- if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr, 0,
- &elf_tdata (abfd)->dwarf2_find_line_info))
- return true;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
+ got_list = htab->got_list;
- msec = bfd_get_section_by_name (abfd, ".mdebug");
- if (msec != NULL)
+ /* On the first time through, pretend we have an existing got list
+ consisting of all of the input files. */
+ if (got_list == NULL)
{
- flagword origflags;
- struct mips_elf_find_line *fi;
- const struct ecoff_debug_swap * const swap =
- get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+ for (i = info->input_bfds; i ; i = i->link.next)
+ {
+ bfd *this_got;
- /* If we are called during a link, alpha_elf_final_link may have
- cleared the SEC_HAS_CONTENTS field. We force it back on here
- if appropriate (which it normally will be). */
- origflags = msec->flags;
- if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
- msec->flags |= SEC_HAS_CONTENTS;
+ if (! is_alpha_elf (i))
+ continue;
- fi = elf_tdata (abfd)->find_line_info;
- if (fi == NULL)
- {
- bfd_size_type external_fdr_size;
- char *fraw_src;
- char *fraw_end;
- struct fdr *fdr_ptr;
- bfd_size_type amt = sizeof (struct mips_elf_find_line);
+ this_got = alpha_elf_tdata (i)->gotobj;
+ if (this_got == NULL)
+ continue;
- fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
- if (fi == NULL)
- {
- msec->flags = origflags;
- return false;
- }
+ /* We are assuming no merging has yet occurred. */
+ BFD_ASSERT (this_got == i);
- if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
+ if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
{
- msec->flags = origflags;
- return false;
+ /* Yikes! A single object file has too many entries. */
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: .got subsegment exceeds 64K (size %d)"),
+ i, alpha_elf_tdata (this_got)->total_got_size);
+ return FALSE;
}
- /* Swap in the FDR information. */
- amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
- fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
- if (fi->d.fdr == NULL)
- {
- msec->flags = origflags;
- return false;
- }
- external_fdr_size = swap->external_fdr_size;
- fdr_ptr = fi->d.fdr;
- fraw_src = (char *) fi->d.external_fdr;
- fraw_end = (fraw_src
- + fi->d.symbolic_header.ifdMax * external_fdr_size);
- for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
- (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
+ if (got_list == NULL)
+ got_list = this_got;
+ else
+ alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
+ cur_got_obj = this_got;
+ }
- elf_tdata (abfd)->find_line_info = fi;
+ /* Strange degenerate case of no got references. */
+ if (got_list == NULL)
+ return TRUE;
- /* Note that we don't bother to ever free this information.
- find_nearest_line is either called all the time, as in
- objdump -l, so the information should be saved, or it is
- rarely called, as in ld error messages, so the memory
- wasted is unimportant. Still, it would probably be a
- good idea for free_cached_info to throw it away. */
- }
+ htab->got_list = got_list;
+ }
- if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
- &fi->i, filename_ptr, functionname_ptr,
- line_ptr))
+ cur_got_obj = got_list;
+ if (cur_got_obj == NULL)
+ return FALSE;
+
+ if (may_merge)
+ {
+ i = alpha_elf_tdata(cur_got_obj)->got_link_next;
+ while (i != NULL)
{
- msec->flags = origflags;
- return true;
- }
+ if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ {
+ elf64_alpha_merge_gots (cur_got_obj, i);
- msec->flags = origflags;
+ alpha_elf_tdata(i)->got->size = 0;
+ i = alpha_elf_tdata(i)->got_link_next;
+ alpha_elf_tdata(cur_got_obj)->got_link_next = i;
+ }
+ else
+ {
+ cur_got_obj = i;
+ i = alpha_elf_tdata(i)->got_link_next;
+ }
+ }
}
- /* Fall back on the generic ELF find_nearest_line routine. */
+ /* Once the gots have been merged, fill in the got offsets for
+ everything therein. */
+ elf64_alpha_calc_got_offsets (info);
- return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr);
+ return TRUE;
}
-\f
-/* Structure used to pass information to alpha_elf_output_extsym. */
-struct extsym_info
+static bfd_boolean
+elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h,
+ void * data)
{
- bfd *abfd;
- struct bfd_link_info *info;
- struct ecoff_debug_info *debug;
- const struct ecoff_debug_swap *swap;
- boolean failed;
-};
+ asection *splt = (asection *) data;
+ struct alpha_elf_got_entry *gotent;
+ bfd_boolean saw_one = FALSE;
+
+ /* If we didn't need an entry before, we still don't. */
+ if (!h->root.needs_plt)
+ return TRUE;
+
+ /* For each LITERAL got entry still in use, allocate a plt entry. */
+ for (gotent = h->got_entries; gotent ; gotent = gotent->next)
+ if (gotent->reloc_type == R_ALPHA_LITERAL
+ && gotent->use_count > 0)
+ {
+ if (splt->size == 0)
+ splt->size = PLT_HEADER_SIZE;
+ gotent->plt_offset = splt->size;
+ splt->size += PLT_ENTRY_SIZE;
+ saw_one = TRUE;
+ }
-static boolean
-elf64_alpha_output_extsym (h, data)
- struct alpha_elf_link_hash_entry *h;
- PTR data;
+ /* If there weren't any, there's no longer a need for the PLT entry. */
+ if (!saw_one)
+ h->root.needs_plt = FALSE;
+
+ return TRUE;
+}
+
+/* Called from relax_section to rebuild the PLT in light of potential changes
+ in the function's status. */
+
+static void
+elf64_alpha_size_plt_section (struct bfd_link_info *info)
{
- struct extsym_info *einfo = (struct extsym_info *) data;
- boolean strip;
- asection *sec, *output_section;
+ asection *splt, *spltrel, *sgotplt;
+ unsigned long entries;
+ struct alpha_elf_link_hash_table * htab;
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
- if (h->root.indx == -2)
- strip = false;
- else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
- && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- strip = true;
- else if (einfo->info->strip == strip_all
- || (einfo->info->strip == strip_some
- && bfd_hash_lookup (einfo->info->keep_hash,
- h->root.root.root.string,
- false, false) == NULL))
- strip = true;
- else
- strip = false;
+ splt = elf_hash_table(info)->splt;
+ if (splt == NULL)
+ return;
- if (strip)
- return true;
+ splt->size = 0;
- if (h->esym.ifd == -2)
- {
- h->esym.jmptbl = 0;
- h->esym.cobol_main = 0;
- h->esym.weakext = 0;
- h->esym.reserved = 0;
- h->esym.ifd = ifdNil;
- h->esym.asym.value = 0;
- h->esym.asym.st = stGlobal;
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_size_plt_section_1, splt);
- if (h->root.root.type != bfd_link_hash_defined
- && h->root.root.type != bfd_link_hash_defweak)
- h->esym.asym.sc = scAbs;
+ /* Every plt entry requires a JMP_SLOT relocation. */
+ spltrel = elf_hash_table(info)->srelplt;
+ entries = 0;
+ if (splt->size)
+ {
+ if (elf64_alpha_use_secureplt)
+ entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE;
else
- {
- const char *name;
+ entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
+ }
+ spltrel->size = entries * sizeof (Elf64_External_Rela);
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
+ /* When using the secureplt, we need two words somewhere in the data
+ segment for the dynamic linker to tell us where to go. This is the
+ entire contents of the .got.plt section. */
+ if (elf64_alpha_use_secureplt)
+ {
+ sgotplt = elf_hash_table(info)->sgotplt;
+ sgotplt->size = entries ? 16 : 0;
+ }
+}
- /* When making a shared library and symbol h is the one from
- the another shared library, OUTPUT_SECTION may be null. */
- if (output_section == NULL)
- h->esym.asym.sc = scUndefined;
- else
- {
- name = bfd_section_name (output_section->owner, output_section);
+static bfd_boolean
+elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *i;
+ struct alpha_elf_link_hash_table * htab;
- if (strcmp (name, ".text") == 0)
- h->esym.asym.sc = scText;
- else if (strcmp (name, ".data") == 0)
- h->esym.asym.sc = scData;
- else if (strcmp (name, ".sdata") == 0)
- h->esym.asym.sc = scSData;
- else if (strcmp (name, ".rodata") == 0
- || strcmp (name, ".rdata") == 0)
- h->esym.asym.sc = scRData;
- else if (strcmp (name, ".bss") == 0)
- h->esym.asym.sc = scBss;
- else if (strcmp (name, ".sbss") == 0)
- h->esym.asym.sc = scSBss;
- else if (strcmp (name, ".init") == 0)
- h->esym.asym.sc = scInit;
- else if (strcmp (name, ".fini") == 0)
- h->esym.asym.sc = scFini;
- else
- h->esym.asym.sc = scAbs;
- }
- }
+ if (bfd_link_relocatable (info))
+ return TRUE;
- h->esym.asym.reserved = 0;
- h->esym.asym.index = indexNil;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
+
+ if (!elf64_alpha_size_got_sections (info, TRUE))
+ return FALSE;
+
+ /* Allocate space for all of the .got subsections. */
+ i = htab->got_list;
+ for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
+ {
+ asection *s = alpha_elf_tdata(i)->got;
+ if (s->size > 0)
+ {
+ s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
}
- if (h->root.root.type == bfd_link_hash_common)
- h->esym.asym.value = h->root.root.u.c.size;
- else if (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
+ return TRUE;
+}
+
+/* The number of dynamic relocations required by a static relocation. */
+
+static int
+alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie)
+{
+ switch (r_type)
{
- if (h->esym.asym.sc == scCommon)
- h->esym.asym.sc = scBss;
- else if (h->esym.asym.sc == scSCommon)
- h->esym.asym.sc = scSBss;
+ /* May appear in GOT entries. */
+ case R_ALPHA_TLSGD:
+ return (dynamic ? 2 : shared ? 1 : 0);
+ case R_ALPHA_TLSLDM:
+ return shared;
+ case R_ALPHA_LITERAL:
+ return dynamic || shared;
+ case R_ALPHA_GOTTPREL:
+ return dynamic || (shared && !pie);
+ case R_ALPHA_GOTDTPREL:
+ return dynamic;
+
+ /* May appear in data sections. */
+ case R_ALPHA_REFLONG:
+ case R_ALPHA_REFQUAD:
+ return dynamic || shared;
+ case R_ALPHA_TPREL64:
+ return dynamic || (shared && !pie);
+
+ /* Everything else is illegal. We'll issue an error during
+ relocate_section. */
+ default:
+ return 0;
+ }
+}
+
+/* Work out the sizes of the dynamic relocation entries. */
+
+static bfd_boolean
+elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h,
+ struct bfd_link_info *info)
+{
+ bfd_boolean dynamic;
+ struct alpha_elf_reloc_entry *relent;
+ unsigned long entries;
+
+ /* If the symbol was defined as a common symbol in a regular object
+ file, and there was no definition in any dynamic object, then the
+ linker will have allocated space for the symbol in a common
+ section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
+ set. This is done for dynamic symbols in
+ elf_adjust_dynamic_symbol but this is not done for non-dynamic
+ symbols, somehow. */
+ if (!h->root.def_regular
+ && h->root.ref_regular
+ && !h->root.def_dynamic
+ && (h->root.root.type == bfd_link_hash_defined
+ || h->root.root.type == bfd_link_hash_defweak)
+ && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
+ h->root.def_regular = 1;
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
- if (output_section != NULL)
- h->esym.asym.value = (h->root.root.u.def.value
- + sec->output_offset
- + output_section->vma);
- else
- h->esym.asym.value = 0;
- }
- else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ /* If the symbol is dynamic, we'll need all the relocations in their
+ natural form. If this is a shared object, and it has been forced
+ local, we'll need the same number of RELATIVE relocations. */
+ dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
+
+ /* If the symbol is a hidden undefined weak, then we never have any
+ relocations. Avoid the loop which may want to add RELATIVE relocs
+ based on bfd_link_pic (info). */
+ if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
+ return TRUE;
+
+ for (relent = h->reloc_entries; relent; relent = relent->next)
{
- /* Set type and value for a symbol with a function stub. */
- h->esym.asym.st = stProc;
- sec = bfd_get_section_by_name (einfo->abfd, ".plt");
- if (sec == NULL)
- h->esym.asym.value = 0;
- else
+ entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
+ bfd_link_pic (info),
+ bfd_link_pie (info));
+ if (entries)
{
- output_section = sec->output_section;
- if (output_section != NULL)
- h->esym.asym.value = (h->root.plt.offset
- + sec->output_offset
- + output_section->vma);
- else
- h->esym.asym.value = 0;
+ relent->srel->size +=
+ entries * sizeof (Elf64_External_Rela) * relent->count;
+ if (relent->reltext)
+ info->flags |= DT_TEXTREL;
}
}
- if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
- h->root.root.root.string,
- &h->esym))
- {
- einfo->failed = true;
- return false;
- }
-
- return true;
+ return TRUE;
}
-\f
-/* Search for and possibly create a got entry. */
-static struct alpha_elf_got_entry *
-get_got_entry (abfd, h, r_type, r_symndx, r_addend)
- bfd *abfd;
- struct alpha_elf_link_hash_entry *h;
- unsigned long r_type, r_symndx;
- bfd_vma r_addend;
+/* Subroutine of elf64_alpha_size_rela_got_section for doing the
+ global symbols. */
+
+static bfd_boolean
+elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h,
+ struct bfd_link_info *info)
{
+ bfd_boolean dynamic;
struct alpha_elf_got_entry *gotent;
- struct alpha_elf_got_entry **slot;
+ unsigned long entries;
- if (h)
- slot = &h->got_entries;
- else
- {
- /* This is a local .got entry -- record for merge. */
+ /* If we're using a plt for this symbol, then all of its relocations
+ for its got entries go into .rela.plt. */
+ if (h->root.needs_plt)
+ return TRUE;
- struct alpha_elf_got_entry **local_got_entries;
+ /* If the symbol is dynamic, we'll need all the relocations in their
+ natural form. If this is a shared object, and it has been forced
+ local, we'll need the same number of RELATIVE relocations. */
+ dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
- if (!local_got_entries)
- {
- bfd_size_type size;
- Elf_Internal_Shdr *symtab_hdr;
+ /* If the symbol is a hidden undefined weak, then we never have any
+ relocations. Avoid the loop which may want to add RELATIVE relocs
+ based on bfd_link_pic (info). */
+ if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
+ return TRUE;
- symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
- size = symtab_hdr->sh_info;
- size *= sizeof (struct alpha_elf_got_entry *);
+ entries = 0;
+ for (gotent = h->got_entries; gotent ; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic,
+ bfd_link_pic (info),
+ bfd_link_pie (info));
- local_got_entries
- = (struct alpha_elf_got_entry **) bfd_alloc (abfd, size);
- if (!local_got_entries)
- return NULL;
+ if (entries > 0)
+ {
+ asection *srel = elf_hash_table(info)->srelgot;
+ BFD_ASSERT (srel != NULL);
+ srel->size += sizeof (Elf64_External_Rela) * entries;
+ }
- memset (local_got_entries, 0, (size_t) size);
- alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
- }
+ return TRUE;
+}
- slot = &local_got_entries[r_symndx];
- }
+/* Set the sizes of the dynamic relocation sections. */
- for (gotent = *slot; gotent ; gotent = gotent->next)
- if (gotent->gotobj == abfd
- && gotent->reloc_type == r_type
- && gotent->addend == r_addend)
- break;
+static void
+elf64_alpha_size_rela_got_section (struct bfd_link_info *info)
+{
+ unsigned long entries;
+ bfd *i;
+ asection *srel;
+ struct alpha_elf_link_hash_table * htab;
- if (!gotent)
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
+
+ /* Shared libraries often require RELATIVE relocs, and some relocs
+ require attention for the main application as well. */
+
+ entries = 0;
+ for (i = htab->got_list;
+ i ; i = alpha_elf_tdata(i)->got_link_next)
{
- int entry_size;
- bfd_size_type amt;
+ bfd *j;
- amt = sizeof (struct alpha_elf_got_entry);
- gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
- if (!gotent)
- return NULL;
+ for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
+ {
+ struct alpha_elf_got_entry **local_got_entries, *gotent;
+ int k, n;
- gotent->gotobj = abfd;
- gotent->addend = r_addend;
- gotent->got_offset = -1;
- gotent->use_count = 1;
- gotent->reloc_type = r_type;
- gotent->reloc_done = 0;
- gotent->reloc_xlated = 0;
+ local_got_entries = alpha_elf_tdata(j)->local_got_entries;
+ if (!local_got_entries)
+ continue;
- gotent->next = *slot;
- *slot = gotent;
+ for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
+ for (gotent = local_got_entries[k];
+ gotent ; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ entries += (alpha_dynamic_entries_for_reloc
+ (gotent->reloc_type, 0, bfd_link_pic (info),
+ bfd_link_pie (info)));
+ }
+ }
- entry_size = alpha_got_entry_size (r_type);
- alpha_elf_tdata (abfd)->total_got_size += entry_size;
- if (!h)
- alpha_elf_tdata(abfd)->local_got_size += entry_size;
+ srel = elf_hash_table(info)->srelgot;
+ if (!srel)
+ {
+ BFD_ASSERT (entries == 0);
+ return;
}
- else
- gotent->use_count += 1;
+ srel->size = sizeof (Elf64_External_Rela) * entries;
- return gotent;
+ /* Now do the non-local symbols. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_size_rela_got_1, info);
}
-/* Handle dynamic relocations when doing an Alpha ELF link. */
+/* Set the sizes of the dynamic sections. */
-static boolean
-elf64_alpha_check_relocs (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
+static bfd_boolean
+elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
{
bfd *dynobj;
- asection *sreloc;
- const char *rel_sec_name;
- Elf_Internal_Shdr *symtab_hdr;
- struct alpha_elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel, *relend;
- boolean got_created;
- bfd_size_type amt;
+ asection *s;
+ bfd_boolean relplt, relocs;
+ struct alpha_elf_link_hash_table * htab;
- if (info->relocateable)
- return true;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
dynobj = elf_hash_table(info)->dynobj;
- if (dynobj == NULL)
- elf_hash_table(info)->dynobj = dynobj = abfd;
-
- sreloc = NULL;
- rel_sec_name = NULL;
- symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
- sym_hashes = alpha_elf_sym_hashes(abfd);
- got_created = false;
+ BFD_ASSERT(dynobj != NULL);
- relend = relocs + sec->reloc_count;
- for (rel = relocs; rel < relend; ++rel)
+ if (elf_hash_table (info)->dynamic_sections_created)
{
- enum {
- NEED_GOT = 1,
- NEED_GOT_ENTRY = 2,
- NEED_DYNREL = 4
- };
-
- unsigned long r_symndx, r_type;
- struct alpha_elf_link_hash_entry *h;
- unsigned int gotent_flags;
- boolean maybe_dynamic;
- unsigned int need;
- bfd_vma addend;
-
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
+ /* Set the contents of the .interp section to the interpreter. */
+ if (bfd_link_executable (info) && !info->nointerp)
{
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
-
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
-
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
+ s = bfd_get_linker_section (dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
- /* We can only get preliminary data on whether a symbol is
- locally or externally defined, as not all of the input files
- have yet been processed. Do something with what we know, as
- this may help reduce memory usage and processing time later. */
- maybe_dynamic = false;
- if (h && ((info->shared
- && (!info->symbolic || info->allow_shlib_undefined))
- || ! (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
- || h->root.root.type == bfd_link_hash_defweak))
- maybe_dynamic = true;
-
- need = 0;
- gotent_flags = 0;
- r_type = ELF64_R_TYPE (rel->r_info);
- addend = rel->r_addend;
-
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- need = NEED_GOT | NEED_GOT_ENTRY;
-
- /* Remember how this literal is used from its LITUSEs.
- This will be important when it comes to decide if we can
- create a .plt entry for a function symbol. */
- while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
- if (rel->r_addend >= 1 && rel->r_addend <= 5)
- gotent_flags |= 1 << rel->r_addend;
- --rel;
-
- /* No LITUSEs -- presumably the address is used somehow. */
- if (gotent_flags == 0)
- gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
- break;
-
- case R_ALPHA_GPDISP:
- case R_ALPHA_GPREL16:
- case R_ALPHA_GPREL32:
- case R_ALPHA_GPRELHIGH:
- case R_ALPHA_GPRELLOW:
- case R_ALPHA_BRSGP:
- need = NEED_GOT;
- break;
+ /* Now that we've seen all of the input files, we can decide which
+ symbols need dynamic relocation entries and which don't. We've
+ collected information in check_relocs that we can now apply to
+ size the dynamic relocation sections. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_calc_dynrel_sizes, info);
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- if (info->shared || maybe_dynamic)
- need = NEED_DYNREL;
- break;
+ elf64_alpha_size_rela_got_section (info);
+ elf64_alpha_size_plt_section (info);
+ }
+ /* else we're not dynamic and by definition we don't need such things. */
- case R_ALPHA_TLSGD:
- case R_ALPHA_TLSLDM:
- case R_ALPHA_GOTDTPREL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- break;
+ /* The check_relocs and adjust_dynamic_symbol entry points have
+ determined the sizes of the various dynamic sections. Allocate
+ memory for them. */
+ relplt = FALSE;
+ relocs = FALSE;
+ for (s = dynobj->sections; s != NULL; s = s->next)
+ {
+ const char *name;
- case R_ALPHA_GOTTPREL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- if (info->shared)
- info->flags |= DF_STATIC_TLS;
- break;
+ if (!(s->flags & SEC_LINKER_CREATED))
+ continue;
- case R_ALPHA_TPREL64:
- if (info->shared || maybe_dynamic)
- need = NEED_DYNREL;
- if (info->shared)
- info->flags |= DF_STATIC_TLS;
- break;
- }
+ /* It's OK to base decisions on the section name, because none
+ of the dynobj section names depend upon the input files. */
+ name = bfd_section_name (s);
- if (need & NEED_GOT)
+ if (CONST_STRNEQ (name, ".rela"))
{
- if (!got_created)
+ if (s->size != 0)
{
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
-
- /* Make sure the object's gotobj is set to itself so
- that we default to every object with its own .got.
- We'll merge .gots later once we've collected each
- object's info. */
- alpha_elf_tdata(abfd)->gotobj = abfd;
+ if (strcmp (name, ".rela.plt") == 0)
+ relplt = TRUE;
+ else
+ relocs = TRUE;
- got_created = 1;
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
}
}
+ else if (! CONST_STRNEQ (name, ".got")
+ && strcmp (name, ".plt") != 0
+ && strcmp (name, ".dynbss") != 0)
+ {
+ /* It's not one of our dynamic sections, so don't allocate space. */
+ continue;
+ }
- if (need & NEED_GOT_ENTRY)
+ if (s->size == 0)
{
- struct alpha_elf_got_entry *gotent;
+ /* If we don't need this section, strip it from the output file.
+ This is to handle .rela.bss and .rela.plt. We must create it
+ in create_dynamic_sections, because it 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. */
+ if (!CONST_STRNEQ (name, ".got"))
+ s->flags |= SEC_EXCLUDE;
+ }
+ else if ((s->flags & SEC_HAS_CONTENTS) != 0)
+ {
+ /* Allocate memory for the section contents. */
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
+ }
- gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
- if (!gotent)
- return false;
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in elf64_alpha_finish_dynamic_sections, but we
+ must add the entries now so that we get the correct size for
+ the .dynamic section. The DT_DEBUG entry is filled in by the
+ dynamic linker and used by the debugger. */
+#define add_dynamic_entry(TAG, VAL) \
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+
+ if (bfd_link_executable (info))
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
- if (gotent_flags)
- {
- gotent->flags |= gotent_flags;
- if (h)
- {
- gotent_flags |= h->flags;
- h->flags = gotent_flags;
+ if (relplt)
+ {
+ if (!add_dynamic_entry (DT_PLTGOT, 0)
+ || !add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+ || !add_dynamic_entry (DT_JMPREL, 0))
+ return FALSE;
- /* Make a guess as to whether a .plt entry is needed. */
- if ((gotent_flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
- && !(gotent_flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC))
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
- else
- h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
- }
+ if (elf64_alpha_use_secureplt
+ && !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
+ return FALSE;
}
- if (need & NEED_DYNREL)
+ if (relocs)
{
- if (rel_sec_name == NULL)
- {
- rel_sec_name = (bfd_elf_string_from_elf_section
- (abfd, elf_elfheader(abfd)->e_shstrndx,
- elf_section_data(sec)->rel_hdr.sh_name));
- if (rel_sec_name == NULL)
- return false;
-
- BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
- && strcmp (bfd_get_section_name (abfd, sec),
- rel_sec_name+5) == 0);
- }
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
+ return FALSE;
- /* We need to create the section here now whether we eventually
- use it or not so that it gets mapped to an output section by
- the linker. If not used, we'll kill it in
- size_dynamic_sections. */
- if (sreloc == NULL)
+ if (info->flags & DF_TEXTREL)
{
- sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
- if (sreloc == NULL)
- {
- flagword flags;
-
- sreloc = bfd_make_section (dynobj, rel_sec_name);
- flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED | SEC_READONLY);
- if (sec->flags & SEC_ALLOC)
- flags |= SEC_ALLOC | SEC_LOAD;
- if (sreloc == NULL
- || !bfd_set_section_flags (dynobj, sreloc, flags)
- || !bfd_set_section_alignment (dynobj, sreloc, 3))
- return false;
- }
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
}
+ }
+ }
+#undef add_dynamic_entry
- if (h)
- {
- /* Since we havn't seen all of the input symbols yet, we
- don't know whether we'll actually need a dynamic relocation
- entry for this reloc. So make a record of it. Once we
- find out if this thing needs dynamic relocation we'll
- expand the relocation sections by the appropriate amount. */
-
- struct alpha_elf_reloc_entry *rent;
+ return TRUE;
+}
+\f
+/* These functions do relaxation for Alpha ELF.
- for (rent = h->reloc_entries; rent; rent = rent->next)
- if (rent->rtype == r_type && rent->srel == sreloc)
- break;
+ Currently I'm only handling what I can do with existing compiler
+ and assembler support, which means no instructions are removed,
+ though some may be nopped. At this time GCC does not emit enough
+ information to do all of the relaxing that is possible. It will
+ take some not small amount of work for that to happen.
- if (!rent)
- {
- amt = sizeof (struct alpha_elf_reloc_entry);
- rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
- if (!rent)
- return false;
+ There are a couple of interesting papers that I once read on this
+ subject, that I cannot find references to at the moment, that
+ related to Alpha in particular. They are by David Wall, then of
+ DEC WRL. */
- rent->srel = sreloc;
- rent->rtype = r_type;
- rent->count = 1;
- rent->reltext = ((sec->flags & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC));
+struct alpha_relax_info
+{
+ bfd *abfd;
+ asection *sec;
+ bfd_byte *contents;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *relocs, *relend;
+ struct bfd_link_info *link_info;
+ bfd_vma gp;
+ bfd *gotobj;
+ asection *tsec;
+ struct alpha_elf_link_hash_entry *h;
+ struct alpha_elf_got_entry **first_gotent;
+ struct alpha_elf_got_entry *gotent;
+ bfd_boolean changed_contents;
+ bfd_boolean changed_relocs;
+ unsigned char other;
+};
- rent->next = h->reloc_entries;
- h->reloc_entries = rent;
- }
- else
- rent->count++;
- }
- else if (info->shared)
- {
- /* If this is a shared library, and the section is to be
- loaded into memory, we need a RELATIVE reloc. */
- sreloc->_raw_size += sizeof (Elf64_External_Rela);
- if ((sec->flags & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC))
- info->flags |= DF_TEXTREL;
- }
- }
+static Elf_Internal_Rela *
+elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel,
+ Elf_Internal_Rela *relend,
+ bfd_vma offset, int type)
+{
+ while (rel < relend)
+ {
+ if (rel->r_offset == offset
+ && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
+ return rel;
+ ++rel;
}
-
- return true;
+ return NULL;
}
-/* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
-
-static boolean
-elf64_alpha_adjust_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
+static bfd_boolean
+elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
+ Elf_Internal_Rela *irel, unsigned long r_type)
{
- bfd *dynobj;
- asection *s;
- struct alpha_elf_link_hash_entry *ah;
+ unsigned int insn;
+ bfd_signed_vma disp;
- dynobj = elf_hash_table(info)->dynobj;
- ah = (struct alpha_elf_link_hash_entry *)h;
+ /* Get the instruction. */
+ insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
- /* Now that we've seen all of the input symbols, finalize our decision
- about whether this symbol should get a .plt entry. */
-
- if (alpha_elf_dynamic_symbol_p (h, info)
- && ((h->type == STT_FUNC
- && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR))
- || (h->type == STT_NOTYPE
- && (ah->flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
- && !(ah->flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC)))
- /* Don't prevent otherwise valid programs from linking by attempting
- to create a new .got entry somewhere. A Correct Solution would be
- to add a new .got section to a new object file and let it be merged
- somewhere later. But for now don't bother. */
- && ah->got_entries)
+ if (insn >> 26 != OP_LDQ)
{
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
-
- s = bfd_get_section_by_name(dynobj, ".plt");
- if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
- return false;
+ reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: %pA+%#" PRIx64 ": warning: "
+ "%s relocation against unexpected insn"),
+ info->abfd, info->sec, (uint64_t) irel->r_offset, howto->name);
+ return TRUE;
+ }
- /* The first bit of the .plt is reserved. */
- if (s->_raw_size == 0)
- s->_raw_size = PLT_HEADER_SIZE;
+ /* Can't relax dynamic symbols. */
+ if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
+ return TRUE;
- h->plt.offset = s->_raw_size;
- s->_raw_size += PLT_ENTRY_SIZE;
+ /* Can't use local-exec relocations in shared libraries. */
+ if (r_type == R_ALPHA_GOTTPREL
+ && bfd_link_dll (info->link_info))
+ return TRUE;
- /* If this symbol is not defined in a regular file, and we are not
- generating a shared library, then set the symbol to the location
- in the .plt. This is required to make function pointers compare
- equal between the normal executable and the shared library. */
- if (! info->shared
- && h->root.type != bfd_link_hash_defweak)
+ if (r_type == R_ALPHA_LITERAL)
+ {
+ /* Look for nice constant addresses. This includes the not-uncommon
+ special case of 0 for undefweak symbols. */
+ if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak)
+ || (!bfd_link_pic (info->link_info)
+ && (symval >= (bfd_vma)-0x8000 || symval < 0x8000)))
{
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
+ disp = 0;
+ insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
+ insn |= (symval & 0xffff);
+ r_type = R_ALPHA_NONE;
}
+ else
+ {
+ /* We may only create GPREL relocs during the second pass. */
+ if (info->link_info->relax_pass == 0)
+ return TRUE;
- /* We also need a JMP_SLOT entry in the .rela.plt section. */
- s = bfd_get_section_by_name (dynobj, ".rela.plt");
- BFD_ASSERT (s != NULL);
- s->_raw_size += sizeof (Elf64_External_Rela);
-
- return true;
+ disp = symval - info->gp;
+ insn = (OP_LDA << 26) | (insn & 0x03ff0000);
+ r_type = R_ALPHA_GPREL16;
+ }
}
else
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
-
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->weakdef != NULL)
{
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
- || h->weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->weakdef->root.u.def.section;
- h->root.u.def.value = h->weakdef->root.u.def.value;
- return true;
- }
-
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. The Alpha, since it uses .got entries for all
- symbols even in regular objects, does not need the hackery of a
- .dynbss section and COPY dynamic relocations. */
-
- return true;
-}
-
-/* Symbol versioning can create new symbols, and make our old symbols
- indirect to the new ones. Consolidate the got and reloc information
- in these situations. */
+ bfd_vma dtp_base, tp_base;
-static boolean
-elf64_alpha_merge_ind_symbols (hi, dummy)
- struct alpha_elf_link_hash_entry *hi;
- PTR dummy ATTRIBUTE_UNUSED;
-{
- struct alpha_elf_link_hash_entry *hs;
+ BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
+ dtp_base = alpha_get_dtprel_base (info->link_info);
+ tp_base = alpha_get_tprel_base (info->link_info);
+ disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
- if (hi->root.root.type != bfd_link_hash_indirect)
- return true;
- hs = hi;
- do {
- hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
- } while (hs->root.root.type == bfd_link_hash_indirect);
+ insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
- /* Merge the flags. Whee. */
+ switch (r_type)
+ {
+ case R_ALPHA_GOTDTPREL:
+ r_type = R_ALPHA_DTPREL16;
+ break;
+ case R_ALPHA_GOTTPREL:
+ r_type = R_ALPHA_TPREL16;
+ break;
+ default:
+ BFD_ASSERT (0);
+ return FALSE;
+ }
+ }
- hs->flags |= hi->flags;
+ if (disp < -0x8000 || disp >= 0x8000)
+ return TRUE;
- /* Merge the .got entries. Cannibalize the old symbol's list in
- doing so, since we don't need it anymore. */
+ bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
+ info->changed_contents = TRUE;
- if (hs->got_entries == NULL)
- hs->got_entries = hi->got_entries;
- else
+ /* Reduce the use count on this got entry by one, possibly
+ eliminating it. */
+ if (--info->gotent->use_count == 0)
{
- struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
-
- gsh = hs->got_entries;
- for (gi = hi->got_entries; gi ; gi = gin)
- {
- gin = gi->next;
- for (gs = gsh; gs ; gs = gs->next)
- if (gi->gotobj == gs->gotobj
- && gi->reloc_type == gs->reloc_type
- && gi->addend == gs->addend)
- {
- gi->use_count += gs->use_count;
- goto got_found;
- }
- gi->next = hs->got_entries;
- hs->got_entries = gi;
- got_found:;
- }
+ int sz = alpha_got_entry_size (r_type);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ if (!info->h)
+ alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
}
- hi->got_entries = NULL;
- /* And similar for the reloc entries. */
+ /* Smash the existing GOT relocation for its 16-bit immediate pair. */
+ irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
+ info->changed_relocs = TRUE;
- if (hs->reloc_entries == NULL)
- hs->reloc_entries = hi->reloc_entries;
- else
- {
- struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
+ /* ??? Search forward through this basic block looking for insns
+ that use the target register. Stop after an insn modifying the
+ register is seen, or after a branch or call.
- rsh = hs->reloc_entries;
- for (ri = hi->reloc_entries; ri ; ri = rin)
- {
- rin = ri->next;
- for (rs = rsh; rs ; rs = rs->next)
- if (ri->rtype == rs->rtype)
- {
- rs->count += ri->count;
- goto found_reloc;
- }
- ri->next = hs->reloc_entries;
- hs->reloc_entries = ri;
- found_reloc:;
- }
- }
- hi->reloc_entries = NULL;
+ Any such memory load insn may be substituted by a load directly
+ off the GP. This allows the memory load insn to be issued before
+ the calculated GP register would otherwise be ready.
- return true;
-}
+ Any such jsr insn can be replaced by a bsr if it is in range.
-/* Is it possible to merge two object file's .got tables? */
+ This would mean that we'd have to _add_ relocations, the pain of
+ which gives one pause. */
+
+ return TRUE;
+}
-static boolean
-elf64_alpha_can_merge_gots (a, b)
- bfd *a, *b;
+static bfd_vma
+elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
{
- int total = alpha_elf_tdata (a)->total_got_size;
- bfd *bsub;
+ /* If the function has the same gp, and we can identify that the
+ function does not use its function pointer, we can eliminate the
+ address load. */
- /* Trivial quick fallout test. */
- if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
- return true;
+ /* If the symbol is marked NOPV, we are being told the function never
+ needs its procedure value. */
+ if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
+ return symval;
- /* By their nature, local .got entries cannot be merged. */
- if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
- return false;
+ /* If the symbol is marked STD_GP, we are being told the function does
+ a normal ldgp in the first two words. */
+ else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
+ ;
- /* Failing the common trivial comparison, we must effectively
- perform the merge. Not actually performing the merge means that
- we don't have to store undo information in case we fail. */
- for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ /* Otherwise, we may be able to identify a GP load in the first two
+ words, which we can then skip. */
+ else
{
- struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- int i, n;
+ Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
+ bfd_vma ofs;
- n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
+ /* Load the relocations from the section that the target symbol is in. */
+ if (info->sec == info->tsec)
{
- struct alpha_elf_got_entry *ae, *be;
- struct alpha_elf_link_hash_entry *h;
-
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ tsec_relocs = info->relocs;
+ tsec_relend = info->relend;
+ tsec_free = NULL;
+ }
+ else
+ {
+ tsec_relocs = (_bfd_elf_link_read_relocs
+ (info->abfd, info->tsec, NULL,
+ (Elf_Internal_Rela *) NULL,
+ info->link_info->keep_memory));
+ if (tsec_relocs == NULL)
+ return 0;
+ tsec_relend = tsec_relocs + info->tsec->reloc_count;
+ tsec_free = (elf_section_data (info->tsec)->relocs == tsec_relocs
+ ? NULL
+ : tsec_relocs);
+ }
- for (be = h->got_entries; be ; be = be->next)
- {
- if (be->use_count == 0)
- continue;
- if (be->gotobj != b)
- continue;
+ /* Recover the symbol's offset within the section. */
+ ofs = (symval - info->tsec->output_section->vma
+ - info->tsec->output_offset);
- for (ae = h->got_entries; ae ; ae = ae->next)
- if (ae->gotobj == a
- && ae->reloc_type == be->reloc_type
- && ae->addend == be->addend)
- goto global_found;
+ /* Look for a GPDISP reloc. */
+ gpdisp = (elf64_alpha_find_reloc_at_ofs
+ (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
- total += alpha_got_entry_size (be->reloc_type);
- if (total > MAX_GOT_SIZE)
- return false;
- global_found:;
- }
+ if (!gpdisp || gpdisp->r_addend != 4)
+ {
+ if (tsec_free)
+ free (tsec_free);
+ return 0;
}
+ if (tsec_free)
+ free (tsec_free);
}
- return true;
-}
+ /* We've now determined that we can skip an initial gp load. Verify
+ that the call and the target use the same gp. */
+ if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec
+ || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
+ return 0;
-/* Actually merge two .got tables. */
+ return symval + 8;
+}
-static void
-elf64_alpha_merge_gots (a, b)
- bfd *a, *b;
+static bfd_boolean
+elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
+ bfd_vma symval, Elf_Internal_Rela *irel)
{
- int total = alpha_elf_tdata (a)->total_got_size;
- bfd *bsub;
-
- /* Remember local expansion. */
- {
- int e = alpha_elf_tdata (b)->local_got_size;
- total += e;
- alpha_elf_tdata (a)->local_got_size += e;
- }
+ Elf_Internal_Rela *urel, *erel, *irelend = info->relend;
+ int flags;
+ bfd_signed_vma disp;
+ bfd_boolean fits16;
+ bfd_boolean fits32;
+ bfd_boolean lit_reused = FALSE;
+ bfd_boolean all_optimized = TRUE;
+ bfd_boolean changed_contents;
+ bfd_boolean changed_relocs;
+ bfd_byte *contents = info->contents;
+ bfd *abfd = info->abfd;
+ bfd_vma sec_output_vma;
+ unsigned int lit_insn;
+ int relax_pass;
- for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ lit_insn = bfd_get_32 (abfd, contents + irel->r_offset);
+ if (lit_insn >> 26 != OP_LDQ)
{
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_elf_link_hash_entry **hashes;
- Elf_Internal_Shdr *symtab_hdr;
- int i, n;
-
- /* Let the local .got entries know they are part of a new subsegment. */
- local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
- if (local_got_entries)
- {
- n = elf_tdata (bsub)->symtab_hdr.sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ent;
- for (ent = local_got_entries[i]; ent; ent = ent->next)
- ent->gotobj = a;
- }
- }
-
- /* Merge the global .got entries. */
- hashes = alpha_elf_sym_hashes (bsub);
- symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
-
- n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ae, *be, **pbe, **start;
- struct alpha_elf_link_hash_entry *h;
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: %pA+%#" PRIx64 ": warning: "
+ "%s relocation against unexpected insn"),
+ abfd, info->sec, (uint64_t) irel->r_offset, "LITERAL");
+ return TRUE;
+ }
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ /* Can't relax dynamic symbols. */
+ if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
+ return TRUE;
- start = &h->got_entries;
- for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
- {
- if (be->use_count == 0)
- {
- *pbe = be->next;
- continue;
- }
- if (be->gotobj != b)
- continue;
+ changed_contents = info->changed_contents;
+ changed_relocs = info->changed_relocs;
+ sec_output_vma = info->sec->output_section->vma + info->sec->output_offset;
+ relax_pass = info->link_info->relax_pass;
- for (ae = *start; ae ; ae = ae->next)
- if (ae->gotobj == a
- && ae->reloc_type == be->reloc_type
- && ae->addend == be->addend)
- {
- ae->flags |= be->flags;
- ae->use_count += be->use_count;
- *pbe = be->next;
- goto global_found;
- }
- be->gotobj = a;
- total += alpha_got_entry_size (be->reloc_type);
+ /* Summarize how this particular LITERAL is used. */
+ for (erel = irel+1, flags = 0; erel < irelend; ++erel)
+ {
+ if (ELF64_R_TYPE (erel->r_info) != R_ALPHA_LITUSE)
+ break;
+ if (erel->r_addend <= 6)
+ flags |= 1 << erel->r_addend;
+ }
- global_found:;
- }
- }
+ /* A little preparation for the loop... */
+ disp = symval - info->gp;
- alpha_elf_tdata (bsub)->gotobj = a;
- }
- alpha_elf_tdata (a)->total_got_size = total;
+ for (urel = irel+1; urel < erel; ++urel)
+ {
+ bfd_vma urel_r_offset = urel->r_offset;
+ unsigned int insn;
+ int insn_disp;
+ bfd_signed_vma xdisp;
+ Elf_Internal_Rela nrel;
- /* Merge the two in_got chains. */
- {
- bfd *next;
+ insn = bfd_get_32 (abfd, contents + urel_r_offset);
- bsub = a;
- while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
- bsub = next;
+ switch (urel->r_addend)
+ {
+ case LITUSE_ALPHA_ADDR:
+ default:
+ /* This type is really just a placeholder to note that all
+ uses cannot be optimized, but to still allow some. */
+ all_optimized = FALSE;
+ break;
- alpha_elf_tdata (bsub)->in_got_link_next = b;
- }
-}
+ case LITUSE_ALPHA_BASE:
+ /* We may only create GPREL relocs during the second pass. */
+ if (relax_pass == 0)
+ {
+ all_optimized = FALSE;
+ break;
+ }
-/* Calculate the offsets for the got entries. */
+ /* We can always optimize 16-bit displacements. */
-static boolean
-elf64_alpha_calc_got_offsets_for_symbol (h, arg)
- struct alpha_elf_link_hash_entry *h;
- PTR arg ATTRIBUTE_UNUSED;
-{
- struct alpha_elf_got_entry *gotent;
+ /* Extract the displacement from the instruction, sign-extending
+ it if necessary, then test whether it is within 16 or 32 bits
+ displacement from GP. */
+ insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000;
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ xdisp = disp + insn_disp;
+ fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
+ fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
+ && xdisp < 0x7fff8000);
- for (gotent = h->got_entries; gotent; gotent = gotent->next)
- if (gotent->use_count > 0)
- {
- bfd_size_type *plge
- = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size;
+ if (fits16)
+ {
+ /* Take the op code and dest from this insn, take the base
+ register from the literal insn. Leave the offset alone. */
+ insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
+ bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
+ changed_contents = TRUE;
+
+ nrel = *urel;
+ nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_GPREL16);
+ nrel.r_addend = irel->r_addend;
+
+ /* As we adjust, move the reloc to the end so that we don't
+ break the LITERAL+LITUSE chain. */
+ if (urel < --erel)
+ *urel-- = *erel;
+ *erel = nrel;
+ changed_relocs = TRUE;
+ }
- gotent->got_offset = *plge;
- *plge += alpha_got_entry_size (gotent->reloc_type);
- }
+ /* If all mem+byte, we can optimize 32-bit mem displacements. */
+ else if (fits32 && !(flags & ~6))
+ {
+ /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
- return true;
-}
+ irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_GPRELHIGH);
+ lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
+ bfd_put_32 (abfd, (bfd_vma) lit_insn, contents + irel->r_offset);
+ lit_reused = TRUE;
+ changed_contents = TRUE;
-static void
-elf64_alpha_calc_got_offsets (info)
- struct bfd_link_info *info;
-{
- bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
+ /* Since all relocs must be optimized, don't bother swapping
+ this relocation to the end. */
+ urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_GPRELLOW);
+ urel->r_addend = irel->r_addend;
+ changed_relocs = TRUE;
+ }
+ else
+ all_optimized = FALSE;
+ break;
- /* First, zero out the .got sizes, as we may be recalculating the
- .got after optimizing it. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
- alpha_elf_tdata(i)->got->_raw_size = 0;
+ case LITUSE_ALPHA_BYTOFF:
+ /* We can always optimize byte instructions. */
- /* Next, fill in the offsets for all the global entries. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_calc_got_offsets_for_symbol,
- NULL);
+ /* FIXME: sanity check the insn for byte op. Check that the
+ literal dest reg is indeed Rb in the byte insn. */
- /* Finally, fill in the offsets for the local entries. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
- {
- bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
- bfd *j;
+ insn &= ~ (unsigned) 0x001ff000;
+ insn |= ((symval & 7) << 13) | 0x1000;
+ bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
+ changed_contents = TRUE;
+
+ nrel = *urel;
+ nrel.r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ nrel.r_addend = 0;
+
+ /* As we adjust, move the reloc to the end so that we don't
+ break the LITERAL+LITUSE chain. */
+ if (urel < --erel)
+ *urel-- = *erel;
+ *erel = nrel;
+ changed_relocs = TRUE;
+ break;
- for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
- {
- struct alpha_elf_got_entry **local_got_entries, *gotent;
- int k, n;
+ case LITUSE_ALPHA_JSR:
+ case LITUSE_ALPHA_TLSGD:
+ case LITUSE_ALPHA_TLSLDM:
+ case LITUSE_ALPHA_JSRDIRECT:
+ {
+ bfd_vma optdest, org;
+ bfd_signed_vma odisp;
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
- continue;
+ /* For undefined weak symbols, we're mostly interested in getting
+ rid of the got entry whenever possible, so optimize this to a
+ use of the zero register. */
+ if (info->h && info->h->root.root.type == bfd_link_hash_undefweak)
+ {
+ insn |= 31 << 16;
+ bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
- for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
- for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
- if (gotent->use_count > 0)
- {
- gotent->got_offset = got_offset;
- got_offset += alpha_got_entry_size (gotent->reloc_type);
- }
- }
+ changed_contents = TRUE;
+ break;
+ }
- alpha_elf_tdata(i)->got->_raw_size = got_offset;
- alpha_elf_tdata(i)->got->_cooked_size = got_offset;
- }
-}
+ /* If not zero, place to jump without needing pv. */
+ optdest = elf64_alpha_relax_opt_call (info, symval);
+ org = sec_output_vma + urel_r_offset + 4;
+ odisp = (optdest ? optdest : symval) - org;
-/* Constructs the gots. */
+ if (odisp >= -0x400000 && odisp < 0x400000)
+ {
+ Elf_Internal_Rela *xrel;
-static boolean
-elf64_alpha_size_got_sections (output_bfd, info)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
-{
- bfd *i, *got_list, *cur_got_obj = NULL;
- int something_changed = 0;
+ /* Preserve branch prediction call stack when possible. */
+ if ((insn & INSN_JSR_MASK) == INSN_JSR)
+ insn = (OP_BSR << 26) | (insn & 0x03e00000);
+ else
+ insn = (OP_BR << 26) | (insn & 0x03e00000);
+ bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
+ changed_contents = TRUE;
- got_list = alpha_elf_hash_table (info)->got_list;
+ nrel = *urel;
+ nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_BRADDR);
+ nrel.r_addend = irel->r_addend;
- /* On the first time through, pretend we have an existing got list
- consisting of all of the input files. */
- if (got_list == NULL)
- {
- for (i = info->input_bfds; i ; i = i->link_next)
- {
- bfd *this_got = alpha_elf_tdata (i)->gotobj;
- if (this_got == NULL)
- continue;
+ if (optdest)
+ nrel.r_addend += optdest - symval;
+ else
+ all_optimized = FALSE;
- /* We are assuming no merging has yet ocurred. */
- BFD_ASSERT (this_got == i);
+ /* Kill any HINT reloc that might exist for this insn. */
+ xrel = (elf64_alpha_find_reloc_at_ofs
+ (info->relocs, info->relend, urel_r_offset,
+ R_ALPHA_HINT));
+ if (xrel)
+ xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
- {
- /* Yikes! A single object file has too many entries. */
- (*_bfd_error_handler)
- (_("%s: .got subsegment exceeds 64K (size %d)"),
- bfd_archive_filename (i),
- alpha_elf_tdata (this_got)->total_got_size);
- return false;
- }
+ /* As we adjust, move the reloc to the end so that we don't
+ break the LITERAL+LITUSE chain. */
+ if (urel < --erel)
+ *urel-- = *erel;
+ *erel = nrel;
- if (got_list == NULL)
- got_list = this_got;
- else
- alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
- cur_got_obj = this_got;
- }
+ info->changed_relocs = TRUE;
+ }
+ else
+ all_optimized = FALSE;
- /* Strange degenerate case of no got references. */
- if (got_list == NULL)
- return true;
+ /* Even if the target is not in range for a direct branch,
+ if we share a GP, we can eliminate the gp reload. */
+ if (optdest)
+ {
+ Elf_Internal_Rela *gpdisp
+ = (elf64_alpha_find_reloc_at_ofs
+ (info->relocs, irelend, urel_r_offset + 4,
+ R_ALPHA_GPDISP));
+ if (gpdisp)
+ {
+ bfd_byte *p_ldah = contents + gpdisp->r_offset;
+ bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
+ unsigned int ldah = bfd_get_32 (abfd, p_ldah);
+ unsigned int lda = bfd_get_32 (abfd, p_lda);
- alpha_elf_hash_table (info)->got_list = got_list;
+ /* Verify that the instruction is "ldah $29,0($26)".
+ Consider a function that ends in a noreturn call,
+ and that the next function begins with an ldgp,
+ and that by accident there is no padding between.
+ In that case the insn would use $27 as the base. */
+ if (ldah == 0x27ba0000 && lda == 0x23bd0000)
+ {
+ bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_ldah);
+ bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_lda);
- /* Force got offsets to be recalculated. */
- something_changed = 1;
+ gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ changed_contents = TRUE;
+ changed_relocs = TRUE;
+ }
+ }
+ }
+ }
+ break;
+ }
}
- cur_got_obj = got_list;
- i = alpha_elf_tdata(cur_got_obj)->got_link_next;
- while (i != NULL)
+ /* If we reused the literal instruction, we must have optimized all. */
+ BFD_ASSERT(!lit_reused || all_optimized);
+
+ /* If all cases were optimized, we can reduce the use count on this
+ got entry by one, possibly eliminating it. */
+ if (all_optimized)
{
- if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ if (--info->gotent->use_count == 0)
{
- elf64_alpha_merge_gots (cur_got_obj, i);
- i = alpha_elf_tdata(i)->got_link_next;
- alpha_elf_tdata(cur_got_obj)->got_link_next = i;
- something_changed = 1;
+ int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ if (!info->h)
+ alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
}
- else
+
+ /* If the literal instruction is no longer needed (it may have been
+ reused. We can eliminate it. */
+ /* ??? For now, I don't want to deal with compacting the section,
+ so just nop it out. */
+ if (!lit_reused)
{
- cur_got_obj = i;
- i = alpha_elf_tdata(i)->got_link_next;
+ irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ changed_relocs = TRUE;
+
+ bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset);
+ changed_contents = TRUE;
}
}
- /* Once the gots have been merged, fill in the got offsets for
- everything therein. */
- if (1 || something_changed)
- elf64_alpha_calc_got_offsets (info);
+ info->changed_contents = changed_contents;
+ info->changed_relocs = changed_relocs;
- return true;
+ if (all_optimized || relax_pass == 0)
+ return TRUE;
+ return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL);
}
-static boolean
-elf64_alpha_always_size_sections (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval,
+ Elf_Internal_Rela *irel, bfd_boolean is_gd)
{
- bfd *i;
+ bfd_byte *pos[5];
+ unsigned int insn, tlsgd_reg;
+ Elf_Internal_Rela *gpdisp, *hint;
+ bfd_boolean dynamic, use_gottprel;
+ unsigned long new_symndx;
- if (info->relocateable)
- return true;
+ dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
- /* First, take care of the indirect symbols created by versioning. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_merge_ind_symbols,
- NULL);
+ /* If a TLS symbol is accessed using IE at least once, there is no point
+ to use dynamic model for it. */
+ if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
+ ;
- if (!elf64_alpha_size_got_sections (output_bfd, info))
- return false;
+ /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
+ then we might as well relax to IE. */
+ else if (bfd_link_pic (info->link_info) && !dynamic
+ && (info->link_info->flags & DF_STATIC_TLS))
+ ;
- /* Allocate space for all of the .got subsections. */
- i = alpha_elf_hash_table (info)->got_list;
- for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
+ /* Otherwise we must be building an executable to do anything. */
+ else if (bfd_link_pic (info->link_info))
+ return TRUE;
+
+ /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
+ the matching LITUSE_TLS relocations. */
+ if (irel + 2 >= info->relend)
+ return TRUE;
+ if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
+ || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
+ || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
+ return TRUE;
+
+ /* There must be a GPDISP relocation positioned immediately after the
+ LITUSE relocation. */
+ gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
+ irel[2].r_offset + 4, R_ALPHA_GPDISP);
+ if (!gpdisp)
+ return TRUE;
+
+ pos[0] = info->contents + irel[0].r_offset;
+ pos[1] = info->contents + irel[1].r_offset;
+ pos[2] = info->contents + irel[2].r_offset;
+ pos[3] = info->contents + gpdisp->r_offset;
+ pos[4] = pos[3] + gpdisp->r_addend;
+
+ /* Beware of the compiler hoisting part of the sequence out a loop
+ and adjusting the destination register for the TLSGD insn. If this
+ happens, there will be a move into $16 before the JSR insn, so only
+ transformations of the first insn pair should use this register. */
+ tlsgd_reg = bfd_get_32 (info->abfd, pos[0]);
+ tlsgd_reg = (tlsgd_reg >> 21) & 31;
+
+ /* Generally, the positions are not allowed to be out of order, lest the
+ modified insn sequence have different register lifetimes. We can make
+ an exception when pos 1 is adjacent to pos 0. */
+ if (pos[1] + 4 == pos[0])
{
- asection *s = alpha_elf_tdata(i)->got;
- if (s->_raw_size > 0)
- {
- s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
- if (s->contents == NULL)
- return false;
- }
+ bfd_byte *tmp = pos[0];
+ pos[0] = pos[1];
+ pos[1] = tmp;
}
+ if (pos[1] >= pos[2] || pos[2] >= pos[3])
+ return TRUE;
- return true;
-}
+ /* Reduce the use count on the LITERAL relocation. Do this before we
+ smash the symndx when we adjust the relocations below. */
+ {
+ struct alpha_elf_got_entry *lit_gotent;
+ struct alpha_elf_link_hash_entry *lit_h;
+ unsigned long indx;
+
+ BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
+ indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
+ lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
+
+ while (lit_h->root.root.type == bfd_link_hash_indirect
+ || lit_h->root.root.type == bfd_link_hash_warning)
+ lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
+
+ for (lit_gotent = lit_h->got_entries; lit_gotent ;
+ lit_gotent = lit_gotent->next)
+ if (lit_gotent->gotobj == info->gotobj
+ && lit_gotent->reloc_type == R_ALPHA_LITERAL
+ && lit_gotent->addend == irel[1].r_addend)
+ break;
+ BFD_ASSERT (lit_gotent);
-/* The number of dynamic relocations required by a static relocation. */
+ if (--lit_gotent->use_count == 0)
+ {
+ int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ }
+ }
-static int
-alpha_dynamic_entries_for_reloc (r_type, dynamic, shared)
- int r_type, dynamic, shared;
-{
- switch (r_type)
+ /* Change
+
+ lda $16,x($gp) !tlsgd!1
+ ldq $27,__tls_get_addr($gp) !literal!1
+ jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
+ ldah $29,0($26) !gpdisp!2
+ lda $29,0($29) !gpdisp!2
+ to
+ ldq $16,x($gp) !gottprel
+ unop
+ call_pal rduniq
+ addq $16,$0,$0
+ unop
+ or the first pair to
+ lda $16,x($gp) !tprel
+ unop
+ or
+ ldah $16,x($gp) !tprelhi
+ lda $16,x($16) !tprello
+
+ as appropriate. */
+
+ use_gottprel = FALSE;
+ new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF;
+
+ /* Some compilers warn about a Boolean-looking expression being
+ used in a switch. The explicit cast silences them. */
+ switch ((int) (!dynamic && !bfd_link_pic (info->link_info)))
{
- /* May appear in GOT entries. */
- case R_ALPHA_TLSGD:
- return (dynamic ? 2 : shared ? 1 : 0);
- case R_ALPHA_TLSLDM:
- return shared;
- case R_ALPHA_LITERAL:
- return dynamic || shared;
- case R_ALPHA_GOTDTPREL:
- case R_ALPHA_GOTTPREL:
- return dynamic;
+ case 1:
+ {
+ bfd_vma tp_base;
+ bfd_signed_vma disp;
- /* May appear in data sections. */
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- return dynamic || shared;
- case R_ALPHA_SREL64:
- case R_ALPHA_TPREL64:
- return dynamic;
+ BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
+ tp_base = alpha_get_tprel_base (info->link_info);
+ disp = symval - tp_base;
+
+ if (disp >= -0x8000 && disp < 0x8000)
+ {
+ insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
+
+ irel[0].r_offset = pos[0] - info->contents;
+ irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
+ irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ break;
+ }
+ else if (disp >= -(bfd_signed_vma) 0x80000000
+ && disp < (bfd_signed_vma) 0x7fff8000
+ && pos[0] + 4 == pos[1])
+ {
+ insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
+ insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
+
+ irel[0].r_offset = pos[0] - info->contents;
+ irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
+ irel[1].r_offset = pos[1] - info->contents;
+ irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
+ break;
+ }
+ }
+ /* FALLTHRU */
- /* Everything else is illegal. We'll issue an error during
- relocate_section. */
default:
- return 0;
+ use_gottprel = TRUE;
+
+ insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
+
+ irel[0].r_offset = pos[0] - info->contents;
+ irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
+ irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ break;
}
-}
-/* Work out the sizes of the dynamic relocation entries. */
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
-static boolean
-elf64_alpha_calc_dynrel_sizes (h, info)
- struct alpha_elf_link_hash_entry *h;
- struct bfd_link_info *info;
-{
- boolean dynamic;
- struct alpha_elf_reloc_entry *relent;
- struct alpha_elf_got_entry *gotent;
- int entries;
+ insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
- /* If the symbol was defined as a common symbol in a regular object
- file, and there was no definition in any dynamic object, then the
- linker will have allocated space for the symbol in a common
- section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
- set. This is done for dynamic symbols in
- elf_adjust_dynamic_symbol but this is not done for non-dynamic
- symbols, somehow. */
- if (((h->root.elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_DYNAMIC))
- == ELF_LINK_HASH_REF_REGULAR)
- && (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
- {
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- }
+ irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- /* If the symbol is dynamic, we'll need all the relocations in their
- natural form. If this is a shared object, and it has been forced
- local, we'll need the same number of RELATIVE relocations. */
+ hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
+ irel[2].r_offset, R_ALPHA_HINT);
+ if (hint)
+ hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
+ info->changed_contents = TRUE;
+ info->changed_relocs = TRUE;
- for (relent = h->reloc_entries; relent; relent = relent->next)
+ /* Reduce the use count on the TLSGD/TLSLDM relocation. */
+ if (--info->gotent->use_count == 0)
{
- entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
- info->shared);
- if (entries)
+ int sz = alpha_got_entry_size (info->gotent->reloc_type);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ if (!info->h)
+ alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
+ }
+
+ /* If we've switched to a GOTTPREL relocation, increment the reference
+ count on that got entry. */
+ if (use_gottprel)
+ {
+ struct alpha_elf_got_entry *tprel_gotent;
+
+ for (tprel_gotent = *info->first_gotent; tprel_gotent ;
+ tprel_gotent = tprel_gotent->next)
+ if (tprel_gotent->gotobj == info->gotobj
+ && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
+ && tprel_gotent->addend == irel->r_addend)
+ break;
+ if (tprel_gotent)
+ tprel_gotent->use_count++;
+ else
{
- relent->srel->_raw_size +=
- entries * sizeof (Elf64_External_Rela) * relent->count;
- if (relent->reltext)
- info->flags |= DT_TEXTREL;
+ if (info->gotent->use_count == 0)
+ tprel_gotent = info->gotent;
+ else
+ {
+ tprel_gotent = (struct alpha_elf_got_entry *)
+ bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
+ if (!tprel_gotent)
+ return FALSE;
+
+ tprel_gotent->next = *info->first_gotent;
+ *info->first_gotent = tprel_gotent;
+
+ tprel_gotent->gotobj = info->gotobj;
+ tprel_gotent->addend = irel->r_addend;
+ tprel_gotent->got_offset = -1;
+ tprel_gotent->reloc_done = 0;
+ tprel_gotent->reloc_xlated = 0;
+ }
+
+ tprel_gotent->use_count = 1;
+ tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
}
}
- entries = 0;
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type,
- dynamic, info->shared);
+ return TRUE;
+}
+
+static bfd_boolean
+elf64_alpha_relax_section (bfd *abfd, asection *sec,
+ struct bfd_link_info *link_info, bfd_boolean *again)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *internal_relocs;
+ Elf_Internal_Rela *irel, *irelend;
+ Elf_Internal_Sym *isymbuf = NULL;
+ struct alpha_elf_got_entry **local_got_entries;
+ struct alpha_relax_info info;
+ struct alpha_elf_link_hash_table * htab;
+ int relax_pass;
- /* If we are using a .plt entry, subtract one, as the first
- reference uses a .rela.plt entry instead. */
- if (h->root.plt.offset != MINUS_ONE)
- entries--;
+ htab = alpha_elf_hash_table (link_info);
+ if (htab == NULL)
+ return FALSE;
- if (entries > 0)
+ /* There's nothing to change, yet. */
+ *again = FALSE;
+
+ if (bfd_link_relocatable (link_info)
+ || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC))
+ != (SEC_CODE | SEC_RELOC | SEC_ALLOC))
+ || sec->reloc_count == 0)
+ return TRUE;
+
+ BFD_ASSERT (is_alpha_elf (abfd));
+ relax_pass = link_info->relax_pass;
+
+ /* Make sure our GOT and PLT tables are up-to-date. */
+ if (htab->relax_trip != link_info->relax_trip)
{
- bfd *dynobj = elf_hash_table(info)->dynobj;
- asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf64_External_Rela) * entries;
+ htab->relax_trip = link_info->relax_trip;
+
+ /* This should never fail after the initial round, since the only error
+ is GOT overflow, and relaxation only shrinks the table. However, we
+ may only merge got sections during the first pass. If we merge
+ sections after we've created GPREL relocs, the GP for the merged
+ section backs up which may put the relocs out of range. */
+ if (!elf64_alpha_size_got_sections (link_info, relax_pass == 0))
+ abort ();
+ if (elf_hash_table (link_info)->dynamic_sections_created)
+ {
+ elf64_alpha_size_plt_section (link_info);
+ elf64_alpha_size_rela_got_section (link_info);
+ }
}
- return true;
-}
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
-/* Set the sizes of the dynamic sections. */
+ /* Load the relocations for this section. */
+ internal_relocs = (_bfd_elf_link_read_relocs
+ (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
+ link_info->keep_memory));
+ if (internal_relocs == NULL)
+ return FALSE;
-static boolean
-elf64_alpha_size_dynamic_sections (output_bfd, info)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
-{
- bfd *dynobj;
- asection *s;
- boolean relplt;
+ memset(&info, 0, sizeof (info));
+ info.abfd = abfd;
+ info.sec = sec;
+ info.link_info = link_info;
+ info.symtab_hdr = symtab_hdr;
+ info.relocs = internal_relocs;
+ info.relend = irelend = internal_relocs + sec->reloc_count;
- dynobj = elf_hash_table(info)->dynobj;
- BFD_ASSERT(dynobj != NULL);
+ /* Find the GP for this object. Do not store the result back via
+ _bfd_set_gp_value, since this could change again before final. */
+ info.gotobj = alpha_elf_tdata (abfd)->gotobj;
+ if (info.gotobj)
+ {
+ asection *sgot = alpha_elf_tdata (info.gotobj)->got;
+ info.gp = (sgot->output_section->vma
+ + sgot->output_offset
+ + 0x8000);
+ }
- if (elf_hash_table (info)->dynamic_sections_created)
+ /* Get the section contents. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ info.contents = elf_section_data (sec)->this_hdr.contents;
+ else
{
- int entries;
- bfd *i;
+ if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
+ goto error_return;
+ }
- /* Set the contents of the .interp section to the interpreter. */
- if (!info->shared)
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ bfd_vma symval;
+ struct alpha_elf_got_entry *gotent;
+ unsigned long r_type = ELF64_R_TYPE (irel->r_info);
+ unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
+
+ /* Early exit for unhandled or unrelaxable relocations. */
+ if (r_type != R_ALPHA_LITERAL)
{
- s = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ /* We complete everything except LITERAL in the first pass. */
+ if (relax_pass != 0)
+ continue;
+ if (r_type == R_ALPHA_TLSLDM)
+ {
+ /* The symbol for a TLSLDM reloc is ignored. Collapse the
+ reloc to the STN_UNDEF (0) symbol so that they all match. */
+ r_symndx = STN_UNDEF;
+ }
+ else if (r_type != R_ALPHA_GOTDTPREL
+ && r_type != R_ALPHA_GOTTPREL
+ && r_type != R_ALPHA_TLSGD)
+ continue;
}
- /* Now that we've seen all of the input files, we can decide which
- symbols need dynamic relocation entries and which don't. We've
- collected information in check_relocs that we can now apply to
- size the dynamic relocation sections. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_calc_dynrel_sizes,
- info);
-
- /* Shared libraries often require RELATIVE relocs, and some relocs
- require attention for the main application as well. */
-
- entries = 0;
- for (i = alpha_elf_hash_table(info)->got_list;
- i ; i = alpha_elf_tdata(i)->got_link_next)
+ /* Get the value of the symbol referred to by the reloc. */
+ if (r_symndx < symtab_hdr->sh_info)
{
- bfd *j;
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+
+ /* Read this BFD's local symbols. */
+ if (isymbuf == NULL)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ goto error_return;
+ }
+
+ isym = isymbuf + r_symndx;
+
+ /* Given the symbol for a TLSLDM reloc is ignored, this also
+ means forcing the symbol value to the tp base. */
+ if (r_type == R_ALPHA_TLSLDM)
+ {
+ info.tsec = bfd_abs_section_ptr;
+ symval = alpha_get_tprel_base (info.link_info);
+ }
+ else
+ {
+ symval = isym->st_value;
+ if (isym->st_shndx == SHN_UNDEF)
+ continue;
+ else if (isym->st_shndx == SHN_ABS)
+ info.tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ info.tsec = bfd_com_section_ptr;
+ else
+ info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ }
- for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
+ info.h = NULL;
+ info.other = isym->st_other;
+ if (local_got_entries)
+ info.first_gotent = &local_got_entries[r_symndx];
+ else
{
- struct alpha_elf_got_entry **local_got_entries, *gotent;
- int k, n;
+ info.first_gotent = &info.gotent;
+ info.gotent = NULL;
+ }
+ }
+ else
+ {
+ unsigned long indx;
+ struct alpha_elf_link_hash_entry *h;
+
+ indx = r_symndx - symtab_hdr->sh_info;
+ h = alpha_elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
+
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+
+ /* If the symbol is undefined, we can't do anything with it. */
+ if (h->root.root.type == bfd_link_hash_undefined)
+ continue;
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
+ /* If the symbol isn't defined in the current module,
+ again we can't do anything. */
+ if (h->root.root.type == bfd_link_hash_undefweak)
+ {
+ info.tsec = bfd_abs_section_ptr;
+ symval = 0;
+ }
+ else if (!h->root.def_regular)
+ {
+ /* Except for TLSGD relocs, which can sometimes be
+ relaxed to GOTTPREL relocs. */
+ if (r_type != R_ALPHA_TLSGD)
continue;
+ info.tsec = bfd_abs_section_ptr;
+ symval = 0;
+ }
+ else
+ {
+ info.tsec = h->root.root.u.def.section;
+ symval = h->root.root.u.def.value;
+ }
+
+ info.h = h;
+ info.other = h->root.other;
+ info.first_gotent = &h->got_entries;
+ }
+
+ /* Search for the got entry to be used by this relocation. */
+ for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
+ if (gotent->gotobj == info.gotobj
+ && gotent->reloc_type == r_type
+ && gotent->addend == irel->r_addend)
+ break;
+ info.gotent = gotent;
+
+ symval += info.tsec->output_section->vma + info.tsec->output_offset;
+ symval += irel->r_addend;
+
+ switch (r_type)
+ {
+ case R_ALPHA_LITERAL:
+ BFD_ASSERT(info.gotent != NULL);
- for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
- for (gotent = local_got_entries[k];
- gotent ; gotent = gotent->next)
- if (gotent->use_count > 0)
- entries += (alpha_dynamic_entries_for_reloc
- (gotent->reloc_type, 0, info->shared));
+ /* If there exist LITUSE relocations immediately following, this
+ opens up all sorts of interesting optimizations, because we
+ now know every location that this address load is used. */
+ if (irel+1 < irelend
+ && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
+ {
+ if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
+ goto error_return;
+ }
+ else
+ {
+ if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
+ goto error_return;
}
+ break;
+
+ case R_ALPHA_GOTDTPREL:
+ case R_ALPHA_GOTTPREL:
+ BFD_ASSERT(info.gotent != NULL);
+ if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
+ goto error_return;
+ break;
+
+ case R_ALPHA_TLSGD:
+ case R_ALPHA_TLSLDM:
+ BFD_ASSERT(info.gotent != NULL);
+ if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
+ r_type == R_ALPHA_TLSGD))
+ goto error_return;
+ break;
+ }
+ }
+
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (!link_info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
}
+ }
- if (entries > 0)
+ if (info.contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != info.contents)
+ {
+ if (!info.changed_contents && !link_info->keep_memory)
+ free (info.contents);
+ else
{
- s = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (s != NULL);
- s->_raw_size += sizeof (Elf64_External_Rela) * entries;
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = info.contents;
}
}
- /* else we're not dynamic and by definition we don't need such things. */
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- relplt = false;
- for (s = dynobj->sections; s != NULL; s = s->next)
+ if (elf_section_data (sec)->relocs != internal_relocs)
{
- const char *name;
- boolean strip;
+ if (!info.changed_relocs)
+ free (internal_relocs);
+ else
+ elf_section_data (sec)->relocs = internal_relocs;
+ }
- if (!(s->flags & SEC_LINKER_CREATED))
- continue;
+ *again = info.changed_contents || info.changed_relocs;
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_get_section_name (dynobj, s);
+ return TRUE;
- /* If we don't need this section, strip it from the output file.
- This is to handle .rela.bss and .rela.plt. We must create it
- in create_dynamic_sections, because it 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. */
+ error_return:
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (info.contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != info.contents)
+ free (info.contents);
+ if (internal_relocs != NULL
+ && elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+ return FALSE;
+}
+\f
+/* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
+ into the next available slot in SREL. */
- strip = false;
+static void
+elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, asection *srel, bfd_vma offset,
+ long dynindx, long rtype, bfd_vma addend)
+{
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
- if (strncmp (name, ".rela", 5) == 0)
- {
- strip = (s->_raw_size == 0);
+ BFD_ASSERT (srel != NULL);
- if (!strip)
- {
- if (strcmp(name, ".rela.plt") == 0)
- relplt = true;
+ outrel.r_info = ELF64_R_INFO (dynindx, rtype);
+ outrel.r_addend = addend;
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
- }
- }
- else if (strcmp (name, ".plt") != 0)
- {
- /* It's not one of our dynamic sections, so don't allocate space. */
- continue;
- }
+ offset = _bfd_elf_section_offset (abfd, info, sec, offset);
+ if ((offset | 1) != (bfd_vma) -1)
+ outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
+ else
+ memset (&outrel, 0, sizeof (outrel));
- if (strip)
- _bfd_strip_section_from_output (info, s);
- else
- {
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return false;
- }
- }
+ loc = srel->contents;
+ loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
+ bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
+ BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
+}
- if (elf_hash_table (info)->dynamic_sections_created)
+/* Relocate an Alpha ELF section for a relocatable link.
+
+ We don't have to change anything unless the reloc is against a section
+ symbol, in which case we have to adjust according to where the section
+ symbol winds up in the output section. */
+
+static bfd_boolean
+elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ bfd *input_bfd, asection *input_section,
+ bfd_byte *contents ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **local_sections)
+{
+ unsigned long symtab_hdr_sh_info;
+ Elf_Internal_Rela *rel;
+ Elf_Internal_Rela *relend;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_boolean ret_val = TRUE;
+
+ symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info;
+ sym_hashes = elf_sym_hashes (input_bfd);
+
+ relend = relocs + input_section->reloc_count;
+ for (rel = relocs; rel < relend; rel++)
{
- /* Add some entries to the .dynamic section. We fill in the
- values later, in elf64_alpha_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
-#define add_dynamic_entry(TAG, VAL) \
- bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
+ unsigned long r_symndx;
+ Elf_Internal_Sym *sym;
+ asection *sec;
+ unsigned long r_type;
- if (!info->shared)
+ r_type = ELF64_R_TYPE (rel->r_info);
+ if (r_type >= R_ALPHA_max)
{
- if (!add_dynamic_entry (DT_DEBUG, 0))
- return false;
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: unsupported relocation type %#x"),
+ input_bfd, (int) r_type);
+ bfd_set_error (bfd_error_bad_value);
+ ret_val = FALSE;
+ continue;
}
- if (!add_dynamic_entry (DT_PLTGOT, 0))
- return false;
+ /* The symbol associated with GPDISP and LITUSE is
+ immaterial. Only the addend is significant. */
+ if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
+ continue;
- if (relplt)
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr_sh_info)
{
- if (!add_dynamic_entry (DT_PLTRELSZ, 0)
- || !add_dynamic_entry (DT_PLTREL, DT_RELA)
- || !add_dynamic_entry (DT_JMPREL, 0))
- return false;
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
}
+ else
+ {
+ struct elf_link_hash_entry *h;
- if (!add_dynamic_entry (DT_RELA, 0)
- || !add_dynamic_entry (DT_RELASZ, 0)
- || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
- return false;
+ h = sym_hashes[r_symndx - symtab_hdr_sh_info];
- if (info->flags & DF_TEXTREL)
- {
- if (!add_dynamic_entry (DT_TEXTREL, 0))
- return false;
+ 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;
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ continue;
+
+ sym = NULL;
+ sec = h->root.u.def.section;
}
+
+ if (sec != NULL && discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, 1, relend,
+ elf64_alpha_howto_table + r_type, 0,
+ contents);
+
+ if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ rel->r_addend += sec->output_offset;
}
-#undef add_dynamic_entry
- return true;
+ return ret_val;
}
/* Relocate an Alpha ELF section. */
-static boolean
-elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+static bfd_boolean
+elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
+ bfd *input_bfd, asection *input_section,
+ bfd_byte *contents, Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **local_sections)
{
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- struct elf_link_tls_segment *tls_segment = NULL;
- asection *sgot = NULL, *srel = NULL, *srelgot = NULL;
- bfd *dynobj = NULL, *gotobj = NULL;
- bfd_vma gp = 0, tp_base = 0, dtp_base = 0;
- boolean ret_val = true;
+ asection *sgot, *srel, *srelgot;
+ bfd *dynobj, *gotobj;
+ bfd_vma gp, tp_base, dtp_base;
+ struct alpha_elf_got_entry **local_got_entries;
+ bfd_boolean ret_val;
- if (!info->relocateable)
- {
- const char *name;
+ BFD_ASSERT (is_alpha_elf (input_bfd));
+
+ /* Handle relocatable links with a smaller loop. */
+ if (bfd_link_relocatable (info))
+ return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
+ input_section, contents, relocs,
+ local_syms, local_sections);
+
+ /* This is a final link. */
- dynobj = elf_hash_table (info)->dynobj;
- if (dynobj)
- srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+ ret_val = TRUE;
- name = (bfd_elf_string_from_elf_section
- (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
- elf_section_data(input_section)->rel_hdr.sh_name));
- BFD_ASSERT(name != NULL);
- srel = bfd_get_section_by_name (dynobj, name);
+ symtab_hdr = &elf_symtab_hdr (input_bfd);
+
+ dynobj = elf_hash_table (info)->dynobj;
+ srelgot = elf_hash_table (info)->srelgot;
+
+ if (input_section->flags & SEC_ALLOC)
+ {
+ const char *section_name;
+ section_name = (bfd_elf_string_from_elf_section
+ (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
+ _bfd_elf_single_rel_hdr (input_section)->sh_name));
+ BFD_ASSERT(section_name != NULL);
+ srel = bfd_get_linker_section (dynobj, section_name);
+ }
+ else
+ srel = NULL;
- /* Find the gp value for this input bfd. */
- gotobj = alpha_elf_tdata (input_bfd)->gotobj;
- if (gotobj)
+ /* Find the gp value for this input bfd. */
+ gotobj = alpha_elf_tdata (input_bfd)->gotobj;
+ if (gotobj)
+ {
+ sgot = alpha_elf_tdata (gotobj)->got;
+ gp = _bfd_get_gp_value (gotobj);
+ if (gp == 0)
{
- sgot = alpha_elf_tdata (gotobj)->got;
- gp = _bfd_get_gp_value (gotobj);
- if (gp == 0)
- {
- gp = (sgot->output_section->vma
- + sgot->output_offset
- + 0x8000);
- _bfd_set_gp_value (gotobj, gp);
- }
- }
-
- tls_segment = elf_hash_table (info)->tls_segment;
- if (tls_segment)
- {
- /* This is PT_TLS segment p_vaddr. */
- dtp_base = tls_segment->start;
-
- /* Main program TLS (whose template starts at PT_TLS p_vaddr)
- is assigned offset round(16, PT_TLS p_align). */
- tp_base = dtp_base - align_power (16, tls_segment->align);
- }
+ gp = (sgot->output_section->vma
+ + sgot->output_offset
+ + 0x8000);
+ _bfd_set_gp_value (gotobj, gp);
+ }
+ }
+ else
+ {
+ sgot = NULL;
+ gp = 0;
+ }
+
+ local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
+
+ if (elf_hash_table (info)->tls_sec != NULL)
+ {
+ dtp_base = alpha_get_dtprel_base (info);
+ tp_base = alpha_get_tprel_base (info);
}
+ else
+ dtp_base = tp_base = 0;
- rel = relocs;
relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
+ for (rel = relocs; rel < relend; rel++)
{
- struct alpha_elf_link_hash_entry *h;
+ struct alpha_elf_link_hash_entry *h = NULL;
struct alpha_elf_got_entry *gotent;
bfd_reloc_status_type r;
reloc_howto_type *howto;
unsigned long r_symndx;
- Elf_Internal_Sym *sym;
- asection *sec;
+ Elf_Internal_Sym *sym = NULL;
+ asection *sec = NULL;
bfd_vma value;
bfd_vma addend;
- boolean dynamic_symbol_p;
- boolean undef_weak_ref;
+ bfd_boolean dynamic_symbol_p;
+ bfd_boolean unresolved_reloc = FALSE;
+ bfd_boolean undef_weak_ref = FALSE;
unsigned long r_type;
r_type = ELF64_R_TYPE(rel->r_info);
if (r_type >= R_ALPHA_max)
{
- (*_bfd_error_handler)
- (_("%s: unknown relocation type %d"),
- bfd_archive_filename (input_bfd), (int)r_type);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: unsupported relocation type %#x"),
+ input_bfd, (int) r_type);
bfd_set_error (bfd_error_bad_value);
- ret_val = false;
+ ret_val = FALSE;
continue;
}
howto = elf64_alpha_howto_table + r_type;
r_symndx = ELF64_R_SYM(rel->r_info);
- if (info->relocateable)
- {
- /* This is a relocateable link. We don't have to change
- anything, unless the reloc is against a section symbol,
- in which case we have to adjust according to where the
- section symbol winds up in the output section. */
-
- /* The symbol associated with GPDISP and LITUSE is
- immaterial. Only the addend is significant. */
- if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
- continue;
-
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
- {
- sec = local_sections[r_symndx];
- rel->r_addend += sec->output_offset + sym->st_value;
- }
- }
-
- continue;
- }
-
- /* This is a final link. */
-
- h = NULL;
- sym = NULL;
- sec = NULL;
- undef_weak_ref = false;
+ /* The symbol for a TLSLDM reloc is ignored. Collapse the
+ reloc to the STN_UNDEF (0) symbol so that they all match. */
+ if (r_type == R_ALPHA_TLSLDM)
+ r_symndx = STN_UNDEF;
if (r_symndx < symtab_hdr->sh_info)
{
+ asection *msec;
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- value = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
-
- gotent = alpha_elf_tdata(input_bfd)->local_got_entries[r_symndx];
+ msec = sec;
+ value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
+
+ /* If this is a tp-relative relocation against sym STN_UNDEF (0),
+ this is hackery from relax_section. Force the value to
+ be the tls module base. */
+ if (r_symndx == STN_UNDEF
+ && (r_type == R_ALPHA_TLSLDM
+ || r_type == R_ALPHA_GOTTPREL
+ || r_type == R_ALPHA_TPREL64
+ || r_type == R_ALPHA_TPRELHI
+ || r_type == R_ALPHA_TPRELLO
+ || r_type == R_ALPHA_TPREL16))
+ value = dtp_base;
+
+ if (local_got_entries)
+ gotent = local_got_entries[r_symndx];
+ else
+ gotent = NULL;
/* Need to adjust local GOT entries' addends for SEC_MERGE
unless it has been done already. */
if ((sec->flags & SEC_MERGE)
- && ELF_ST_TYPE (sym->st_info) == STT_SECTION
- && (elf_section_data (sec)->sec_info_type
- == ELF_INFO_TYPE_MERGE)
- && !gotent->reloc_xlated)
+ && ELF_ST_TYPE (sym->st_info) == STT_SECTION
+ && sec->sec_info_type == SEC_INFO_TYPE_MERGE
+ && gotent
+ && !gotent->reloc_xlated)
{
struct alpha_elf_got_entry *ent;
- asection *msec;
for (ent = gotent; ent; ent = ent->next)
{
_bfd_merged_section_offset (output_bfd, &msec,
elf_section_data (sec)->
sec_info,
- sym->st_value + ent->addend,
- (bfd_vma) 0);
+ sym->st_value + ent->addend);
ent->addend -= sym->st_value;
ent->addend += msec->output_section->vma
+ msec->output_offset
}
}
- dynamic_symbol_p = false;
+ dynamic_symbol_p = FALSE;
}
else
{
- h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info];
+ bfd_boolean warned, ignored;
+ struct elf_link_hash_entry *hh;
+ struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ hh, sec, value,
+ unresolved_reloc, warned, ignored);
- value = 0;
- if (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- {
- sec = h->root.root.u.def.section;
-
- /* Detect the cases that sym_sec->output_section is
- expected to be NULL -- all cases in which the symbol
- is defined in another shared module. This includes
- PLT relocs for which we've created a PLT entry and
- other relocs for which we're prepared to create
- dynamic relocations. */
- /* ??? Just accept it NULL and continue. */
-
- if (sec->output_section != NULL)
- value = (h->root.root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- }
- else if (h->root.root.type == bfd_link_hash_undefweak)
- undef_weak_ref = true;
- else if (info->shared
- && (!info->symbolic || info->allow_shlib_undefined)
- && !info->no_undefined
- && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
- ;
- else
- {
- if (!((*info->callbacks->undefined_symbol)
- (info, h->root.root.root.string, input_bfd,
- input_section, rel->r_offset,
- (!info->shared || info->no_undefined
- || ELF_ST_VISIBILITY (h->root.other)))))
- return false;
- ret_val = false;
- continue;
- }
+ if (warned)
+ continue;
- dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
+ if (value == 0
+ && ! unresolved_reloc
+ && hh->root.type == bfd_link_hash_undefweak)
+ undef_weak_ref = TRUE;
+
+ h = (struct alpha_elf_link_hash_entry *) hh;
+ dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
gotent = h->got_entries;
}
+ if (sec != NULL && discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, 1, relend, howto, 0, contents);
+
addend = rel->r_addend;
value += addend;
/* If the symbol has been forced local, output a
RELATIVE reloc, otherwise it will be handled in
finish_dynamic_symbol. */
- if (info->shared && !dynamic_symbol_p)
- {
- Elf_Internal_Rela outrel;
-
- BFD_ASSERT(srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- outrel.r_info = ELF64_R_INFO (0, R_ALPHA_RELATIVE);
- outrel.r_addend = value;
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)
- srelgot->contents)
- + srelgot->reloc_count++);
- BFD_ASSERT (sizeof (Elf64_External_Rela)
- * srelgot->reloc_count
- <= srelgot->_cooked_size);
- }
+ if (bfd_link_pic (info)
+ && !dynamic_symbol_p
+ && !undef_weak_ref)
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
+ gotent->got_offset, 0,
+ R_ALPHA_RELATIVE, value);
}
value = (sgot->output_section->vma
value -= gp;
goto default_reloc;
- case R_ALPHA_GPREL16:
case R_ALPHA_GPREL32:
+ case R_ALPHA_GPREL16:
case R_ALPHA_GPRELLOW:
if (dynamic_symbol_p)
- {
- (*_bfd_error_handler)
- (_("%s: gp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: gp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
BFD_ASSERT(gp != 0);
value -= gp;
goto default_reloc;
case R_ALPHA_GPRELHIGH:
if (dynamic_symbol_p)
- {
- (*_bfd_error_handler)
- (_("%s: gp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: gp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
BFD_ASSERT(gp != 0);
value -= gp;
value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
case R_ALPHA_BRADDR:
if (dynamic_symbol_p)
- {
- (*_bfd_error_handler)
- (_("%s: pc-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: pc-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
/* The regular PC-relative stuff measures from the start of
the instruction rather than the end. */
value -= 4;
/* The source and destination gp must be the same. Note that
the source will always have an assigned gp, since we forced
one in check_relocs, but that the destination may not, as
- it might not have had any relocations at all. Also take
+ it might not have had any relocations at all. Also take
care not to crash if H is an undefined symbol. */
if (h != NULL && sec != NULL
&& alpha_elf_tdata (sec->owner)->gotobj
&& gotobj != alpha_elf_tdata (sec->owner)->gotobj)
{
- (*_bfd_error_handler)
- (_("%s: change in gp: BRSGP %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: change in gp: BRSGP %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
/* The symbol should be marked either NOPV or STD_GPLOAD. */
switch (other & STO_ALPHA_STD_GPLOAD)
{
case STO_ALPHA_NOPV:
- break;
+ break;
case STO_ALPHA_STD_GPLOAD:
- addend += 8;
+ value += 8;
break;
default:
if (h != NULL)
if (name == NULL)
name = _("<unknown>");
else if (name[0] == 0)
- name = bfd_section_name (input_bfd, sec);
+ name = bfd_section_name (sec);
}
- (*_bfd_error_handler)
- (_("%s: !samegp reloc against symbol without .prologue: %s"),
- bfd_archive_filename (input_bfd), name);
- ret_val = false;
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: !samegp reloc against symbol without .prologue: %s"),
+ input_bfd, name);
+ ret_val = FALSE;
break;
}
case R_ALPHA_DTPREL64:
case R_ALPHA_TPREL64:
{
- Elf_Internal_Rela outrel;
+ long dynindx, dyntype = r_type;
+ bfd_vma dynaddend;
/* Careful here to remember RELATIVE relocations for global
variables for symbolic shared objects. */
if (dynamic_symbol_p)
{
BFD_ASSERT(h->root.dynindx != -1);
- outrel.r_info = ELF64_R_INFO (h->root.dynindx, r_type);
- outrel.r_addend = addend;
+ dynindx = h->root.dynindx;
+ dynaddend = addend;
addend = 0, value = 0;
}
else if (r_type == R_ALPHA_DTPREL64)
{
- BFD_ASSERT(tls_segment != NULL);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= dtp_base;
goto default_reloc;
}
else if (r_type == R_ALPHA_TPREL64)
{
- BFD_ASSERT(tls_segment != NULL);
- value -= dtp_base;
- goto default_reloc;
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
+ if (!bfd_link_dll (info))
+ {
+ value -= tp_base;
+ goto default_reloc;
+ }
+ dynindx = 0;
+ dynaddend = value - dtp_base;
}
- else if (info->shared
- && r_symndx != 0
- && (input_section->flags & SEC_ALLOC))
+ else if (bfd_link_pic (info)
+ && r_symndx != STN_UNDEF
+ && (input_section->flags & SEC_ALLOC)
+ && !undef_weak_ref
+ && !(unresolved_reloc
+ && (_bfd_elf_section_offset (output_bfd, info,
+ input_section,
+ rel->r_offset)
+ == (bfd_vma) -1)))
{
if (r_type == R_ALPHA_REFLONG)
{
- (*_bfd_error_handler)
- (_("%s: unhandled dynamic relocation against %s"),
- bfd_archive_filename (input_bfd),
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: unhandled dynamic relocation against %s"),
+ input_bfd,
h->root.root.root.string);
- ret_val = false;
+ ret_val = FALSE;
}
- outrel.r_info = ELF64_R_INFO (0, R_ALPHA_RELATIVE);
- outrel.r_addend = value;
+ dynindx = 0;
+ dyntype = R_ALPHA_RELATIVE;
+ dynaddend = value;
}
else
goto default_reloc;
- BFD_ASSERT(srel != NULL);
-
- outrel.r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset);
- if ((outrel.r_offset | 1) != (bfd_vma) -1)
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
- else
- memset (&outrel, 0, sizeof outrel);
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)
- srel->contents)
- + srel->reloc_count++);
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
- <= srel->_cooked_size);
+ if (input_section->flags & SEC_ALLOC)
+ elf64_alpha_emit_dynrel (output_bfd, info, input_section,
+ srel, rel->r_offset, dynindx,
+ dyntype, dynaddend);
}
goto default_reloc;
case R_ALPHA_SREL32:
case R_ALPHA_SREL64:
if (dynamic_symbol_p)
- {
- (*_bfd_error_handler)
- (_("%s: pc-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: pc-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
+ else if (bfd_link_pic (info)
+ && undef_weak_ref)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: pc-relative relocation against undefined weak symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
+
/* ??? .eh_frame references to discarded sections will be smashed
to relocations against SHN_UNDEF. The .eh_frame format allows
NULL to be encoded as 0 in any format, so this works here. */
- if (r_symndx == 0)
+ if (r_symndx == STN_UNDEF
+ || (unresolved_reloc
+ && _bfd_elf_section_offset (output_bfd, info,
+ input_section,
+ rel->r_offset) == (bfd_vma) -1))
howto = (elf64_alpha_howto_table
+ (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
goto default_reloc;
gotent->reloc_done = 1;
/* Note that the module index for the main program is 1. */
- bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p,
+ bfd_put_64 (output_bfd,
+ !bfd_link_pic (info) && !dynamic_symbol_p,
sgot->contents + gotent->got_offset);
/* If the symbol has been forced local, output a
DTPMOD64 reloc, otherwise it will be handled in
finish_dynamic_symbol. */
- if (info->shared && !dynamic_symbol_p)
- {
- Elf_Internal_Rela outrel;
-
- BFD_ASSERT(srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- /* ??? Proper dynindx here. */
- outrel.r_info = ELF64_R_INFO (0, R_ALPHA_DTPMOD64);
- outrel.r_addend = 0;
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)
- srelgot->contents)
- + srelgot->reloc_count++);
- BFD_ASSERT (sizeof (Elf64_External_Rela)
- * srelgot->reloc_count
- <= srelgot->_cooked_size);
- }
+ if (bfd_link_pic (info) && !dynamic_symbol_p)
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
+ gotent->got_offset, 0,
+ R_ALPHA_DTPMOD64, 0);
if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
value = 0;
else
{
- BFD_ASSERT(tls_segment != NULL);
- value -= dtp_base;
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
+ value -= dtp_base;
}
bfd_put_64 (output_bfd, value,
sgot->contents + gotent->got_offset + 8);
case R_ALPHA_DTPRELLO:
case R_ALPHA_DTPREL16:
if (dynamic_symbol_p)
- {
- (*_bfd_error_handler)
- (_("%s: dtp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
- BFD_ASSERT(tls_segment != NULL);
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: dtp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= dtp_base;
+ if (r_type == R_ALPHA_DTPRELHI)
+ value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
goto default_reloc;
case R_ALPHA_TPRELHI:
case R_ALPHA_TPRELLO:
case R_ALPHA_TPREL16:
- if (dynamic_symbol_p)
- {
- (*_bfd_error_handler)
- (_("%s: tp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
- BFD_ASSERT(tls_segment != NULL);
+ if (bfd_link_dll (info))
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: TLS local exec code cannot be linked into shared objects"),
+ input_bfd);
+ ret_val = FALSE;
+ }
+ else if (dynamic_symbol_p)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: tp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= tp_base;
+ if (r_type == R_ALPHA_TPRELHI)
+ value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
goto default_reloc;
case R_ALPHA_GOTDTPREL:
value = 0;
else
{
- BFD_ASSERT(tls_segment != NULL);
- value -= (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
+ if (r_type == R_ALPHA_GOTDTPREL)
+ value -= dtp_base;
+ else if (bfd_link_executable (info))
+ value -= tp_base;
+ else
+ {
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
+ gotent->got_offset, 0,
+ R_ALPHA_TPREL64,
+ value - dtp_base);
+ value = 0;
+ }
}
bfd_put_64 (output_bfd, value,
sgot->contents + gotent->got_offset);
if (r_symndx < symtab_hdr->sh_info
&& sec != NULL && howto->pc_relative
- && elf_discarded_section (sec))
+ && discarded_section (sec))
break;
if (h != NULL)
- name = h->root.root.root.string;
+ name = NULL;
else
{
name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name));
if (name == NULL)
- return false;
+ return FALSE;
if (*name == '\0')
- name = bfd_section_name (input_bfd, sec);
+ name = bfd_section_name (sec);
}
- if (! ((*info->callbacks->reloc_overflow)
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset)))
- ret_val = false;
+ (*info->callbacks->reloc_overflow)
+ (info, (h ? &h->root.root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
}
break;
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
-static boolean
-elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
- bfd *output_bfd;
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+static bfd_boolean
+elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
- bfd *dynobj = elf_hash_table(info)->dynobj;
+ struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h;
- if (h->plt.offset != MINUS_ONE)
+ if (h->needs_plt)
{
/* Fill in the .plt entry for this symbol. */
asection *splt, *sgot, *srel;
Elf_Internal_Rela outrel;
+ bfd_byte *loc;
bfd_vma got_addr, plt_addr;
bfd_vma plt_index;
struct alpha_elf_got_entry *gotent;
BFD_ASSERT (h->dynindx != -1);
- /* The first .got entry will be updated by the .plt with the
- address of the target function. */
- gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
- BFD_ASSERT (gotent && gotent->addend == 0);
-
- splt = bfd_get_section_by_name (dynobj, ".plt");
+ splt = elf_hash_table (info)->splt;
BFD_ASSERT (splt != NULL);
- srel = bfd_get_section_by_name (dynobj, ".rela.plt");
+ srel = elf_hash_table (info)->srelplt;
BFD_ASSERT (srel != NULL);
- sgot = alpha_elf_tdata (gotent->gotobj)->got;
- BFD_ASSERT (sgot != NULL);
-
- got_addr = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- plt_addr = (splt->output_section->vma
- + splt->output_offset
- + h->plt.offset);
-
- plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
-
- /* Fill in the entry in the procedure linkage table. */
- {
- bfd_vma insn1, insn2, insn3;
-
- insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff);
- insn2 = PLT_ENTRY_WORD2;
- insn3 = PLT_ENTRY_WORD3;
- bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset);
- bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4);
- bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8);
- }
+ for (gotent = ah->got_entries; gotent ; gotent = gotent->next)
+ if (gotent->reloc_type == R_ALPHA_LITERAL
+ && gotent->use_count > 0)
+ {
+ unsigned int insn;
+ int disp;
- /* Fill in the entry in the .rela.plt section. */
- outrel.r_offset = got_addr;
- outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
- outrel.r_addend = 0;
+ sgot = alpha_elf_tdata (gotent->gotobj)->got;
+ BFD_ASSERT (sgot != NULL);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)srel->contents
- + plt_index));
+ BFD_ASSERT (gotent->got_offset != -1);
+ BFD_ASSERT (gotent->plt_offset != -1);
- if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
- {
- /* Mark the symbol as undefined, rather than as defined in the
- .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- }
+ got_addr = (sgot->output_section->vma
+ + sgot->output_offset
+ + gotent->got_offset);
+ plt_addr = (splt->output_section->vma
+ + splt->output_offset
+ + gotent->plt_offset);
- /* Fill in the entries in the .got. */
- bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
+ plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
- /* Subsequent .got entries will continue to bounce through the .plt. */
- if (gotent->next)
- {
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (! info->shared || srel != NULL);
+ /* Fill in the entry in the procedure linkage table. */
+ if (elf64_alpha_use_secureplt)
+ {
+ disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4);
+ insn = INSN_AD (INSN_BR, 31, disp);
+ bfd_put_32 (output_bfd, insn,
+ splt->contents + gotent->plt_offset);
- gotent = gotent->next;
- do
- {
- sgot = alpha_elf_tdata(gotent->gotobj)->got;
- BFD_ASSERT(sgot != NULL);
- BFD_ASSERT(gotent->addend == 0);
+ plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE)
+ / NEW_PLT_ENTRY_SIZE);
+ }
+ else
+ {
+ disp = -(gotent->plt_offset + 4);
+ insn = INSN_AD (INSN_BR, 28, disp);
+ bfd_put_32 (output_bfd, insn,
+ splt->contents + gotent->plt_offset);
+ bfd_put_32 (output_bfd, INSN_UNOP,
+ splt->contents + gotent->plt_offset + 4);
+ bfd_put_32 (output_bfd, INSN_UNOP,
+ splt->contents + gotent->plt_offset + 8);
+
+ plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE)
+ / OLD_PLT_ENTRY_SIZE);
+ }
- bfd_put_64 (output_bfd, plt_addr,
- sgot->contents + gotent->got_offset);
+ /* Fill in the entry in the .rela.plt section. */
+ outrel.r_offset = got_addr;
+ outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
+ outrel.r_addend = 0;
- if (info->shared)
- {
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
- outrel.r_addend = plt_addr;
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)
- srel->contents)
- + srel->reloc_count++);
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
- <= srel->_cooked_size);
- }
+ loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- gotent = gotent->next;
- }
- while (gotent != NULL);
- }
+ /* Fill in the entry in the .got. */
+ bfd_put_64 (output_bfd, plt_addr,
+ sgot->contents + gotent->got_offset);
+ }
}
else if (alpha_elf_dynamic_symbol_p (h, info))
{
/* Fill in the dynamic relocations for this symbol's .got entries. */
asection *srel;
- Elf_Internal_Rela outrel;
struct alpha_elf_got_entry *gotent;
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
+ srel = elf_hash_table (info)->srelgot;
BFD_ASSERT (srel != NULL);
for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
gotent != NULL;
gotent = gotent->next)
{
- asection *sgot = alpha_elf_tdata (gotent->gotobj)->got;
- int r_type;
+ asection *sgot;
+ long r_type;
+
+ if (gotent->use_count == 0)
+ continue;
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
+ sgot = alpha_elf_tdata (gotent->gotobj)->got;
r_type = gotent->reloc_type;
switch (r_type)
abort ();
}
- outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
- outrel.r_addend = gotent->addend;
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)srel->contents
- + srel->reloc_count++));
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
+ gotent->got_offset, h->dynindx,
+ r_type, gotent->addend);
if (gotent->reloc_type == R_ALPHA_TLSGD)
- {
- outrel.r_offset += 8;
- outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_DTPREL64);
-
- bfd_elf64_swap_reloca_out (output_bfd, &outrel,
- ((Elf64_External_Rela *)srel->contents
- + srel->reloc_count++));
- }
-
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
- <= srel->_cooked_size);
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
+ gotent->got_offset + 8, h->dynindx,
+ R_ALPHA_DTPREL64, gotent->addend);
}
}
/* Mark some specially defined symbols as absolute. */
- if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
- || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
+ if (h == elf_hash_table (info)->hdynamic
+ || h == elf_hash_table (info)->hgot
+ || h == elf_hash_table (info)->hplt)
sym->st_shndx = SHN_ABS;
- return true;
+ return TRUE;
}
/* Finish up the dynamic sections. */
-static boolean
-elf64_alpha_finish_dynamic_sections (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
{
bfd *dynobj;
asection *sdyn;
dynobj = elf_hash_table (info)->dynobj;
- sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+ sdyn = bfd_get_linker_section (dynobj, ".dynamic");
if (elf_hash_table (info)->dynamic_sections_created)
{
- asection *splt;
+ asection *splt, *sgotplt, *srelaplt;
Elf64_External_Dyn *dyncon, *dynconend;
+ bfd_vma plt_vma, gotplt_vma;
- splt = bfd_get_section_by_name (dynobj, ".plt");
+ splt = elf_hash_table (info)->splt;
+ srelaplt = elf_hash_table (info)->srelplt;
BFD_ASSERT (splt != NULL && sdyn != NULL);
+ plt_vma = splt->output_section->vma + splt->output_offset;
+
+ gotplt_vma = 0;
+ if (elf64_alpha_use_secureplt)
+ {
+ sgotplt = elf_hash_table (info)->sgotplt;
+ BFD_ASSERT (sgotplt != NULL);
+ if (sgotplt->size > 0)
+ gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset;
+ }
+
dyncon = (Elf64_External_Dyn *) sdyn->contents;
- dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+ dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
- const char *name;
- asection *s;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
case DT_PLTGOT:
- name = ".plt";
- goto get_vma;
- case DT_PLTRELSZ:
- name = ".rela.plt";
- goto get_size;
- case DT_JMPREL:
- name = ".rela.plt";
- goto get_vma;
-
- case DT_RELASZ:
- /* My interpretation of the TIS v1.1 ELF document indicates
- that RELASZ should not include JMPREL. This is not what
- the rest of the BFD does. It is, however, what the
- glibc ld.so wants. Do this fixup here until we found
- out who is right. */
- s = bfd_get_section_by_name (output_bfd, ".rela.plt");
- if (s)
- {
- dyn.d_un.d_val -=
- (s->_cooked_size ? s->_cooked_size : s->_raw_size);
- }
+ dyn.d_un.d_ptr
+ = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma;
break;
-
- get_vma:
- s = bfd_get_section_by_name (output_bfd, name);
- dyn.d_un.d_ptr = (s ? s->vma : 0);
+ case DT_PLTRELSZ:
+ dyn.d_un.d_val = srelaplt ? srelaplt->size : 0;
break;
-
- get_size:
- s = bfd_get_section_by_name (output_bfd, name);
- dyn.d_un.d_val =
- (s->_cooked_size ? s->_cooked_size : s->_raw_size);
+ case DT_JMPREL:
+ dyn.d_un.d_ptr = srelaplt ? (srelaplt->output_section->vma
+ + srelaplt->output_offset) : 0;
break;
}
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
}
- /* Initialize the PLT0 entry */
- if (splt->_raw_size > 0)
+ /* Initialize the plt header. */
+ if (splt->size > 0)
{
- bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
- bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
- bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
- bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
+ unsigned int insn;
+ int ofs;
+
+ if (elf64_alpha_use_secureplt)
+ {
+ ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE);
+
+ insn = INSN_ABC (INSN_SUBQ, 27, 28, 25);
+ bfd_put_32 (output_bfd, insn, splt->contents);
+
+ insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16);
+ bfd_put_32 (output_bfd, insn, splt->contents + 4);
+
+ insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25);
+ bfd_put_32 (output_bfd, insn, splt->contents + 8);
+
+ insn = INSN_ABO (INSN_LDA, 28, 28, ofs);
+ bfd_put_32 (output_bfd, insn, splt->contents + 12);
+
+ insn = INSN_ABO (INSN_LDQ, 27, 28, 0);
+ bfd_put_32 (output_bfd, insn, splt->contents + 16);
+
+ insn = INSN_ABC (INSN_ADDQ, 25, 25, 25);
+ bfd_put_32 (output_bfd, insn, splt->contents + 20);
+
+ insn = INSN_ABO (INSN_LDQ, 28, 28, 8);
+ bfd_put_32 (output_bfd, insn, splt->contents + 24);
- /* The next two words will be filled in by ld.so */
- bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 16);
- bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 24);
+ insn = INSN_AB (INSN_JMP, 31, 27);
+ bfd_put_32 (output_bfd, insn, splt->contents + 28);
- elf_section_data (splt->output_section)->this_hdr.sh_entsize =
- PLT_HEADER_SIZE;
+ insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE);
+ bfd_put_32 (output_bfd, insn, splt->contents + 32);
+ }
+ else
+ {
+ insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */
+ bfd_put_32 (output_bfd, insn, splt->contents);
+
+ insn = INSN_ABO (INSN_LDQ, 27, 27, 12);
+ bfd_put_32 (output_bfd, insn, splt->contents + 4);
+
+ insn = INSN_UNOP;
+ bfd_put_32 (output_bfd, insn, splt->contents + 8);
+
+ insn = INSN_AB (INSN_JMP, 27, 27);
+ bfd_put_32 (output_bfd, insn, splt->contents + 12);
+
+ /* The next two words will be filled in by ld.so. */
+ bfd_put_64 (output_bfd, 0, splt->contents + 16);
+ bfd_put_64 (output_bfd, 0, splt->contents + 24);
+ }
+
+ elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
}
}
- return true;
+ return TRUE;
}
/* We need to use a special link routine to handle the .mdebug section.
We need to merge all instances of these sections together, not write
them all out sequentially. */
-static boolean
-elf64_alpha_final_link (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info)
{
asection *o;
struct bfd_link_order *p;
const struct ecoff_debug_swap *swap
= get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
HDRR *symhdr = &debug.symbolic_header;
- PTR mdebug_handle = NULL;
+ void * mdebug_handle = NULL;
+ struct alpha_elf_link_hash_table * htab;
+
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
/* Go through the sections and collect the mdebug information. */
mdebug_sec = NULL;
debug.external_ext = debug.external_ext_end = NULL;
mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
- if (mdebug_handle == (PTR) NULL)
- return false;
+ if (mdebug_handle == NULL)
+ return FALSE;
if (1)
{
if (s != NULL)
{
esym.asym.value = s->vma;
- last = s->vma + s->_raw_size;
+ last = s->vma + s->size;
}
else
esym.asym.value = last;
if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
name[i], &esym))
- return false;
+ return FALSE;
}
}
- for (p = o->link_order_head;
+ for (p = o->map_head.link_order;
p != (struct bfd_link_order *) NULL;
p = p->next)
{
input_section = p->u.indirect.section;
input_bfd = input_section->owner;
- if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
- || (get_elf_backend_data (input_bfd)
- ->elf_backend_ecoff_debug_swap) == NULL)
- {
- /* I don't know what a non ALPHA ELF bfd would be
- doing with a .mdebug section, but I don't really
- want to deal with it. */
- continue;
- }
+ if (! is_alpha_elf (input_bfd))
+ /* I don't know what a non ALPHA ELF bfd would be
+ doing with a .mdebug section, but I don't really
+ want to deal with it. */
+ continue;
input_swap = (get_elf_backend_data (input_bfd)
->elf_backend_ecoff_debug_swap);
- BFD_ASSERT (p->size == input_section->_raw_size);
+ BFD_ASSERT (p->size == input_section->size);
/* The ECOFF linking code expects that we have already
read in the debugging information and set up an
ecoff_debug_info structure, so we do that now. */
if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
&input_debug))
- return false;
+ return FALSE;
if (! (bfd_ecoff_debug_accumulate
(mdebug_handle, abfd, &debug, swap, input_bfd,
&input_debug, input_swap, info)))
- return false;
+ return FALSE;
/* Loop through the external symbols. For each one with
interesting information, try to find the symbol in
the linker global hash table and save the information
for the output external symbols. */
- eraw_src = input_debug.external_ext;
+ eraw_src = (char *) input_debug.external_ext;
eraw_end = (eraw_src
+ (input_debug.symbolic_header.iextMax
* input_swap->external_ext_size));
const char *name;
struct alpha_elf_link_hash_entry *h;
- (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
+ (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext);
if (ext.asym.sc == scNil
|| ext.asym.sc == scUndefined
|| ext.asym.sc == scSUndefined)
continue;
name = input_debug.ssext + ext.asym.iss;
- h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
- name, false, false, true);
+ h = alpha_elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE);
if (h == NULL || h->esym.ifd != -2)
continue;
einfo.info = info;
einfo.debug = &debug;
einfo.swap = swap;
- einfo.failed = false;
+ einfo.failed = FALSE;
elf_link_hash_traverse (elf_hash_table (info),
elf64_alpha_output_extsym,
- (PTR) &einfo);
+ &einfo);
if (einfo.failed)
- return false;
+ return FALSE;
/* Set the size of the .mdebug section. */
- o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
+ o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
/* Skip this section later on (I don't think this currently
matters, but someday it might). */
- o->link_order_head = (struct bfd_link_order *) NULL;
+ o->map_head.link_order = (struct bfd_link_order *) NULL;
mdebug_sec = o;
}
}
/* Invoke the regular ELF backend linker to do all the work. */
- if (! bfd_elf64_bfd_final_link (abfd, info))
- return false;
+ if (! bfd_elf_final_link (abfd, info))
+ return FALSE;
/* Now write out the computed sections. */
/* The .got subsections... */
{
bfd *i, *dynobj = elf_hash_table(info)->dynobj;
- for (i = alpha_elf_hash_table(info)->got_list;
+ for (i = htab->got_list;
i != NULL;
i = alpha_elf_tdata(i)->got_link_next)
{
if (! bfd_set_section_contents (abfd, sgot->output_section,
sgot->contents,
(file_ptr) sgot->output_offset,
- sgot->_raw_size))
- return false;
+ sgot->size))
+ return FALSE;
}
}
if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
swap, info,
mdebug_sec->filepos))
- return false;
+ return FALSE;
bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
}
- return true;
+ return TRUE;
}
static enum elf_reloc_type_class
-elf64_alpha_reloc_type_class (rela)
- const Elf_Internal_Rela *rela;
+elf64_alpha_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const asection *rel_sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela *rela)
{
switch ((int) ELF64_R_TYPE (rela->r_info))
{
}
}
\f
+static const struct bfd_elf_special_section elf64_alpha_special_sections[] =
+{
+ { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
+ { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
+ { NULL, 0, 0, 0, 0 }
+};
+
/* ECOFF swapping routines. These are used when dealing with the
.mdebug section, which is in the ECOFF debugging format. Copied
from elf32-mips.c. */
\f
/* Use a non-standard hash bucket size of 8. */
-const struct elf_size_info alpha_elf_size_info =
+static const struct elf_size_info alpha_elf_size_info =
{
sizeof (Elf64_External_Ehdr),
sizeof (Elf64_External_Phdr),
sizeof (Elf_External_Note),
8,
1,
- 64, 8,
+ 64, 3,
ELFCLASS64, EV_CURRENT,
bfd_elf64_write_out_phdrs,
bfd_elf64_write_shdrs_and_ehdr,
+ bfd_elf64_checksum_contents,
bfd_elf64_write_relocs,
+ bfd_elf64_swap_symbol_in,
bfd_elf64_swap_symbol_out,
bfd_elf64_slurp_reloc_table,
bfd_elf64_slurp_symbol_table,
bfd_elf64_swap_dyn_in,
bfd_elf64_swap_dyn_out,
- NULL,
- NULL,
- NULL,
- NULL
+ bfd_elf64_swap_reloc_in,
+ bfd_elf64_swap_reloc_out,
+ bfd_elf64_swap_reloca_in,
+ bfd_elf64_swap_reloca_out
};
-#define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
+#define TARGET_LITTLE_SYM alpha_elf64_vec
#define TARGET_LITTLE_NAME "elf64-alpha"
#define ELF_ARCH bfd_arch_alpha
+#define ELF_TARGET_ID ALPHA_ELF_DATA
#define ELF_MACHINE_CODE EM_ALPHA
#define ELF_MAXPAGESIZE 0x10000
+#define ELF_COMMONPAGESIZE 0x2000
#define bfd_elf64_bfd_link_hash_table_create \
elf64_alpha_bfd_link_hash_table_create
#define bfd_elf64_bfd_reloc_type_lookup \
elf64_alpha_bfd_reloc_type_lookup
+#define bfd_elf64_bfd_reloc_name_lookup \
+ elf64_alpha_bfd_reloc_name_lookup
#define elf_info_to_howto \
elf64_alpha_info_to_howto
#define elf_backend_add_symbol_hook \
elf64_alpha_add_symbol_hook
+#define elf_backend_relocs_compatible \
+ _bfd_elf_relocs_compatible
+#define elf_backend_sort_relocs_p \
+ elf64_alpha_sort_relocs_p
#define elf_backend_check_relocs \
elf64_alpha_check_relocs
#define elf_backend_create_dynamic_sections \
elf64_alpha_create_dynamic_sections
#define elf_backend_adjust_dynamic_symbol \
elf64_alpha_adjust_dynamic_symbol
+#define elf_backend_merge_symbol_attribute \
+ elf64_alpha_merge_symbol_attribute
+#define elf_backend_copy_indirect_symbol \
+ elf64_alpha_copy_indirect_symbol
#define elf_backend_always_size_sections \
elf64_alpha_always_size_sections
#define elf_backend_size_dynamic_sections \
elf64_alpha_size_dynamic_sections
+#define elf_backend_omit_section_dynsym \
+ _bfd_elf_omit_section_dynsym_all
#define elf_backend_relocate_section \
elf64_alpha_relocate_section
#define elf_backend_finish_dynamic_symbol \
#define elf_backend_reloc_type_class \
elf64_alpha_reloc_type_class
+#define elf_backend_can_gc_sections 1
+#define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
+
#define elf_backend_ecoff_debug_swap \
&elf64_alpha_ecoff_debug_swap
#define elf_backend_size_info \
alpha_elf_size_info
+#define elf_backend_special_sections \
+ elf64_alpha_special_sections
+
/* A few constants that determine how the .plt section is set up. */
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 1
#define elf_backend_got_header_size 0
-#define elf_backend_plt_header_size PLT_HEADER_SIZE
+#define elf_backend_dtrel_excludes_plt 1
+
+#include "elf64-target.h"
+\f
+/* FreeBSD support. */
+
+#undef TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
+#undef TARGET_LITTLE_NAME
+#define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
+#undef ELF_OSABI
+#define ELF_OSABI ELFOSABI_FREEBSD
+
+/* The kernel recognizes executables as valid only if they carry a
+ "FreeBSD" label in the ELF header. So we put this label on all
+ executables and (for simplicity) also all other object files. */
+
+static bfd_boolean
+elf64_alpha_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
+{
+ Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
+
+ if (!_bfd_elf_init_file_header (abfd, info))
+ return FALSE;
+
+ i_ehdrp = elf_elfheader (abfd);
+
+ /* Put an ABI label supported by FreeBSD >= 4.1. */
+ i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
+#ifdef OLD_FREEBSD_ABI_LABEL
+ /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
+ memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
+#endif
+ return TRUE;
+}
+
+#undef elf_backend_init_file_header
+#define elf_backend_init_file_header \
+ elf64_alpha_fbsd_init_file_header
+
+#undef elf64_bed
+#define elf64_bed elf64_alpha_fbsd_bed
#include "elf64-target.h"
projects / deliverable / binutils-gdb.git / blobdiff