/* Alpha specific support for 64-bit ELF
- Copyright 1996, 1997, 1998, 1999, 2000, 2001
- 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 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 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_FUNC 0x08
+ /* 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;
+
+ /* How many references to this entry? */
+ int use_count;
+
+ /* The relocation type of this entry. */
+ unsigned char reloc_type;
- /* which .got subsection? */
- bfd *gotobj;
+ /* How a LITERAL is used. */
+ unsigned char flags;
- /* the addend in effect for this entry. */
- bfd_vma addend;
+ /* Have we initialized the dynamic relocation for this entry? */
+ unsigned char reloc_done;
- /* the .got offset for this entry. */
- int got_offset;
+ /* Have we adjusted this entry for SEC_MERGE? */
+ unsigned char reloc_xlated;
+};
- int flags;
+struct alpha_elf_reloc_entry
+{
+ struct alpha_elf_reloc_entry *next;
- /* Additional flags. */
-#define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10
-#define ALPHA_ELF_GOT_ENTRY_RELOCS_XLATED 0x20
+ /* Which .reloc section? */
+ asection *srel;
- int use_count;
- } *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);
- ret = (struct alpha_elf_link_hash_table *) bfd_zalloc (abfd, amt);
+ ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
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))
{
- bfd_release (abfd, ret);
+ 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 section. */
asection *got;
- /* For every got, this is it's total number of *entries*. */
- int total_got_entries;
+ /* For every got, this is it's total number of words. */
+ int total_got_size;
- /* For every got, this is the sum of the number of *entries* required
+ /* For every got, this is the sum of the number of words required
to hold all of the member object's local got. */
- int n_local_got_entries;
+ 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 relocation function which doesn't do anything. */
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "BRSGP", /* name */
+ FALSE, /* partial_inplace */
+ 0x1fffff, /* src_mask */
+ 0x1fffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
-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;
-{
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_ok;
-}
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "TLSGD", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
-/* A relocation function used for an unsupported reloc. */
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "TLSLDM", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
-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;
-{
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_notsupported;
-}
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "DTPMOD64", /* name */
+ FALSE, /* partial_inplace */
+ MINUS_ONE, /* src_mask */
+ MINUS_ONE, /* dst_mask */
+ FALSE), /* pcrel_offset */
-/* Do the work of the GPDISP relocation. */
+ /* Creates a 64-bit offset in the got for the displacement
+ from DTP to the target. */
+ HOWTO (R_ALPHA_GOTDTPREL, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "GOTDTPREL", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
-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;
-{
- bfd_reloc_status_type ret = bfd_reloc_ok;
- bfd_vma addend;
- unsigned long i_ldah, i_lda;
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "DTPREL64", /* name */
+ FALSE, /* partial_inplace */
+ MINUS_ONE, /* src_mask */
+ MINUS_ONE, /* dst_mask */
+ FALSE), /* pcrel_offset */
- i_ldah = bfd_get_32 (abfd, p_ldah);
- i_lda = bfd_get_32 (abfd, p_lda);
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "DTPRELHI", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- /* Complain if the instructions are not correct. */
- if (((i_ldah >> 26) & 0x3f) != 0x09
- || ((i_lda >> 26) & 0x3f) != 0x08)
- ret = bfd_reloc_dangerous;
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "DTPRELLO", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- /* 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 (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;
-{
- bfd_reloc_status_type ret;
- bfd_vma gp, relocation;
- 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;
- }
-
- 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);
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "DTPREL16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- relocation = (input_section->output_section->vma
- + input_section->output_offset
- + reloc_entry->address);
+ /* Creates a 64-bit offset in the got for the displacement
+ from TP to the target. */
+ HOWTO (R_ALPHA_GOTTPREL, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "GOTTPREL", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- p_ldah = (bfd_byte *) data + reloc_entry->address;
- p_lda = p_ldah + reloc_entry->addend;
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "TPREL64", /* name */
+ FALSE, /* partial_inplace */
+ MINUS_ONE, /* src_mask */
+ MINUS_ONE, /* dst_mask */
+ FALSE), /* pcrel_offset */
- ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "TPRELHI", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- /* Complain if the instructions are not correct. */
- if (ret == bfd_reloc_dangerous)
- *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "TPRELLO", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- return ret;
-}
+ /* 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 */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "TPREL16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+};
/* A mapping from BFD reloc types to Alpha ELF reloc types. */
{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},
};
/* Given a BFD reloc type, return a HOWTO structure. */
static reloc_howto_type *
-elf64_alpha_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
+elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
const struct elf_reloc_map *i, *e;
i = e = elf64_alpha_reloc_map;
return 0;
}
+static reloc_howto_type *
+elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
+{
+ unsigned int i;
+
+ 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];
+
+ return NULL;
+}
+
/* Given an Alpha ELF reloc type, fill in an arelent structure. */
-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_info_to_howto (bfd *abfd, arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
{
- unsigned r_type;
+ unsigned r_type = ELF64_R_TYPE(dst->r_info);
- r_type = ELF64_R_TYPE(dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
+ 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;
}
-\f
-/* These functions do relaxation for Alpha ELF.
- 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.
+/* 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)
- 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. */
+/* This is PT_TLS segment p_vaddr. */
+#define alpha_get_dtprel_base(info) \
+ (elf_hash_table (info)->tls_sec->vma)
-#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 0x2fe00000
+/* 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. */
-struct alpha_relax_info
+static bfd_boolean
+elf64_alpha_section_from_shdr (bfd *abfd,
+ Elf_Internal_Shdr *hdr,
+ const char *name,
+ int shindex)
{
- 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;
-};
+ asection *newsect;
+
+ /* 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)
+ {
+ case SHT_ALPHA_DEBUG:
+ if (strcmp (name, ".mdebug") != 0)
+ return FALSE;
+ break;
+ default:
+ return FALSE;
+ }
-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 (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
+ return FALSE;
+ newsect = hdr->bfd_section;
-static boolean elf64_alpha_relax_without_lituse
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel));
+ if (hdr->sh_type == SHT_ALPHA_DEBUG)
+ {
+ if (!bfd_set_section_flags (newsect,
+ bfd_section_flags (newsect) | SEC_DEBUGGING))
+ return FALSE;
+ }
-static bfd_vma elf64_alpha_relax_opt_call
- PARAMS((struct alpha_relax_info *info, bfd_vma symval));
+ return TRUE;
+}
-static boolean elf64_alpha_relax_section
- PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
- boolean *again));
+/* Convert Alpha specific section flags to bfd internal section flags. */
-static Elf_Internal_Rela *
-elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
- Elf_Internal_Rela *rel, *relend;
- bfd_vma offset;
- int type;
+static bfd_boolean
+elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
{
- while (rel < relend)
- {
- if (rel->r_offset == offset
- && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
- return rel;
- ++rel;
- }
- return NULL;
+ if (hdr->sh_flags & SHF_ALPHA_GPREL)
+ *flags |= SEC_SMALL_DATA;
+
+ 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;
+/* 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 bfd_boolean
+elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
{
- 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;
+ register const char *name;
- 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;
- }
+ name = bfd_section_name (sec);
- /* Summarize how this particular LITERAL is used. */
- for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
+ if (strcmp (name, ".mdebug") == 0)
{
- if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
- break;
- if (urel->r_addend <= 3)
- flags |= 1 << urel->r_addend;
+ 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;
- /* A little preparation for the loop... */
- disp = symval - info->gp;
+ return TRUE;
+}
+
+/* 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. */
- for (urel = irel+1, i = 0; i < count; ++i, ++urel)
+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)
+{
+ if (sym->st_shndx == SHN_COMMON
+ && !bfd_link_relocatable (info)
+ && sym->st_size <= elf_gp_size (abfd))
{
- unsigned int insn;
- int insn_disp;
- bfd_signed_vma xdisp;
+ /* Common symbols less than or equal to -G nn bytes are
+ automatically put into .sbss. */
- insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
+ asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
- switch (urel->r_addend)
+ if (scomm == NULL)
{
- 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;
+ scomm = bfd_make_section_with_flags (abfd, ".scommon",
+ (SEC_ALLOC
+ | SEC_IS_COMMON
+ | SEC_LINKER_CREATED));
+ if (scomm == NULL)
+ return FALSE;
+ }
- case 1: /* MEM FORMAT */
- /* We can always optimize 16-bit displacements. */
+ *secp = scomm;
+ *valp = sym->st_size;
+ }
- /* 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. */
+ return TRUE;
+}
- xdisp = disp + insn_disp;
- fits16 = (xdisp >= - (bfd_signed_vma) 0x00008000 && xdisp < 0x00008000);
- fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 && xdisp < 0x7fff8000);
+/* Create the .got section. */
- 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;
+static bfd_boolean
+elf64_alpha_create_got_section (bfd *abfd,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+ flagword flags;
+ asection *s;
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
- info->changed_contents = true;
- }
+ if (! is_alpha_elf (abfd))
+ return FALSE;
- /* 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. */
+ 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;
- 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;
+ alpha_elf_tdata (abfd)->got = s;
- 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;
+ /* 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;
- case 2: /* BYTE OFFSET FORMAT */
- /* We can always optimize byte instructions. */
+ return TRUE;
+}
- /* FIXME: sanity check the insn for byte op. Check that the
- literal dest reg is indeed Rb in the byte insn. */
+/* Create all the dynamic sections. */
- insn &= ~ (unsigned) 0x001ff000;
- insn |= ((symval & 7) << 13) | 0x1000;
+static bfd_boolean
+elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
+{
+ asection *s;
+ flagword flags;
+ struct elf_link_hash_entry *h;
- urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- urel->r_addend = 0;
- info->changed_relocs = true;
+ if (! is_alpha_elf (abfd))
+ return FALSE;
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
- info->changed_contents = true;
- break;
+ /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
- 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;
+ 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;
- odisp = (optdest ? optdest : symval) - org;
- if (odisp >= -0x400000 && odisp < 0x400000)
- {
- Elf_Internal_Rela *xrel;
+ /* 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;
- /* 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);
+ 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;
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_BRADDR);
- urel->r_addend = irel->r_addend;
+ if (elf64_alpha_use_secureplt)
+ {
+ 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;
+ }
- if (optdest)
- urel->r_addend += optdest - symval;
- else
- all_optimized = false;
+ /* We may or may not have created a .got section for this object, but
+ we definitely havn't done the rest of the work. */
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
+ if (alpha_elf_tdata(abfd)->gotobj == NULL)
+ {
+ if (!elf64_alpha_create_got_section (abfd, info))
+ return FALSE;
+ }
- /* 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);
+ 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;
- info->changed_contents = true;
- info->changed_relocs = true;
- }
- else
- all_optimized = false;
+ /* 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;
- /* 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);
+ return TRUE;
+}
+\f
+/* Read ECOFF debugging information from a .mdebug section into a
+ ecoff_debug_info structure. */
- /* 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);
+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;
- gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_contents = true;
- info->changed_relocs = true;
- }
- }
- }
- }
- break;
- }
+ swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+ memset (debug, 0, sizeof (*debug));
+
+ ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
+ if (ext_hdr == NULL && swap->external_hdr_size != 0)
+ goto error_return;
+
+ if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
+ swap->external_hdr_size))
+ goto error_return;
+
+ symhdr = &debug->symbolic_header;
+ (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
+
+ /* 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; \
}
- /* If all cases were optimized, we can reduce the use count on this
- got entry by one, possibly eliminating it. */
- if (all_optimized)
+ 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
+
+ debug->fdr = NULL;
+
+ return 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;
+}
+
+/* Alpha ELF local labels start with '$'. */
+
+static bfd_boolean
+elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
+{
+ return name[0] == '$';
+}
+
+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;
+
+ 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;
+
+ msec = bfd_get_section_by_name (abfd, ".mdebug");
+ if (msec != NULL)
{
- info->gotent->use_count -= 1;
- alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1;
- if (!info->h)
- alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1;
+ 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 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)
+ /* 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;
+
+ fi = alpha_elf_tdata (abfd)->find_line_info;
+ if (fi == NULL)
{
- irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_relocs = true;
+ 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);
+
+ fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt);
+ if (fi == NULL)
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
+
+ if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
+ {
+ msec->flags = origflags;
+ 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, fraw_src, fdr_ptr);
+
+ alpha_elf_tdata (abfd)->find_line_info = fi;
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
- info->contents + irel->r_offset);
- info->changed_contents = 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. */
+ }
+
+ if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
+ &fi->i, filename_ptr, functionname_ptr,
+ line_ptr))
+ {
+ msec->flags = origflags;
+ return 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;
+
+ sec = h->root.root.u.def.section;
+ output_section = sec->output_section;
+
+ /* 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 (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;
+ }
}
- /* Recover the symbol's offset within the section. */
- ofs = (symval - info->tsec->output_section->vma
- - info->tsec->output_offset);
+ h->esym.asym.reserved = 0;
+ h->esym.asym.index = indexNil;
+ }
- /* Look for a GPDISP reloc. */
- gpdisp = (elf64_alpha_find_reloc_at_ofs
- (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
+ 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;
- if (!gpdisp || gpdisp->r_addend != 4)
- {
- if (tsec_free)
- free (tsec_free);
- return 0;
- }
- if (tsec_free)
- free (tsec_free);
+ 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;
}
- /* 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 (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
+ h->root.root.root.string,
+ &h->esym))
+ {
+ einfo->failed = TRUE;
+ return FALSE;
+ }
- return symval + 8;
+ 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. */
- info->gotent->use_count -= 1;
- alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1;
- if (!info->h)
- alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1;
+ 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;
+
+ amt = sizeof (struct alpha_elf_got_entry);
+ gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
+ if (!gotent)
+ return NULL;
+
+ 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;
- Any such jsr insn can be replaced by a bsr if it is in range.
+ return gotent;
+}
- This would mean that we'd have to _add_ relocations, the pain of
- which gives one pause. */
+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_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;
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_relax_info info;
-
- /* We are not currently changing any sizes, so only one pass. */
- *again = false;
+ struct alpha_elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel, *relend;
+ bfd_size_type amt;
- if (link_info->relocateable
- || (sec->flags & SEC_RELOC) == 0
- || sec->reloc_count == 0)
- return true;
+ if (bfd_link_relocatable (info))
+ 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;
+ /* 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;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
+ BFD_ASSERT (is_alpha_elf (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;
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ elf_hash_table (info)->dynobj = dynobj = abfd;
- 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;
+ sreloc = NULL;
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ sym_hashes = alpha_elf_sym_hashes (abfd);
- /* Find the GP for this object. */
- info.gotobj = alpha_elf_tdata (abfd)->gotobj;
- if (info.gotobj)
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; ++rel)
{
- asection *sgot = alpha_elf_tdata (info.gotobj)->got;
- info.gp = _bfd_get_gp_value (info.gotobj);
- if (info.gp == 0)
+ 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;
+
+ case R_ALPHA_REFLONG:
+ case R_ALPHA_REFQUAD:
+ if (bfd_link_pic (info) || maybe_dynamic)
+ need = NEED_DYNREL;
+ break;
+
+ 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 */
+
+ case R_ALPHA_TLSGD:
+ case R_ALPHA_GOTDTPREL:
+ need = NEED_GOT | NEED_GOT_ENTRY;
+ break;
+
+ 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;
+
+ case R_ALPHA_TPREL64:
+ if (bfd_link_dll (info))
+ {
+ info->flags |= DF_STATIC_TLS;
+ need = NEED_DYNREL;
+ }
+ else if (maybe_dynamic)
+ need = NEED_DYNREL;
+ break;
+ }
+
+ if (need & NEED_GOT)
+ {
+ if (alpha_elf_tdata(abfd)->gotobj == NULL)
+ {
+ if (!elf64_alpha_create_got_section (abfd, info))
+ return FALSE;
+ }
+ }
+
+ if (need & NEED_GOT_ENTRY)
{
- info.gp = (sgot->output_section->vma
- + sgot->output_offset
- + 0x8000);
- _bfd_set_gp_value (info.gotobj, info.gp);
+ struct alpha_elf_got_entry *gotent;
+
+ gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
+ if (!gotent)
+ return FALSE;
+
+ if (gotent_flags)
+ {
+ gotent->flags |= gotent_flags;
+ if (h)
+ {
+ gotent_flags |= h->flags;
+ h->flags = gotent_flags;
+
+ /* 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));
+ }
+ }
+ }
+
+ 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);
+
+ if (sreloc == NULL)
+ return FALSE;
+ }
+
+ 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;
+
+ for (rent = h->reloc_entries; rent; rent = rent->next)
+ if (rent->rtype == r_type && rent->srel == sreloc)
+ break;
+
+ if (!rent)
+ {
+ amt = sizeof (struct alpha_elf_reloc_entry);
+ rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
+ if (!rent)
+ return FALSE;
+
+ rent->srel = sreloc;
+ rent->rtype = r_type;
+ rent->count = 1;
+ rent->reltext = (sec->flags & SEC_READONLY) != 0;
+
+ 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;
+ }
}
}
- for (irel = internal_relocs; irel < irelend; irel++)
+ return TRUE;
+}
+
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+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))
{
- bfd_vma symval;
- Elf_Internal_Sym isym;
- struct alpha_elf_got_entry *gotent;
+ case R_ALPHA_LITUSE:
+ case R_ALPHA_GPDISP:
+ case R_ALPHA_HINT:
+ return NULL;
+ }
- if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL)
- continue;
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
+}
- /* 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
- {
- info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
- if (info.contents == NULL)
- goto error_return;
- free_contents = info.contents;
+/* 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. */
- if (! bfd_get_section_contents (abfd, sec, info.contents,
- (file_ptr) 0, sec->_raw_size))
- goto error_return;
- }
- }
+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;
- /* Read this BFD's symbols if we haven't done so already. */
- if (extsyms == NULL)
- {
- if (symtab_hdr->contents != NULL)
- extsyms = (Elf64_External_Sym *) symtab_hdr->contents;
- else
- {
- extsyms = (Elf64_External_Sym *) bfd_malloc (symtab_hdr->sh_size);
- if (extsyms == NULL)
- goto error_return;
- free_extsyms = extsyms;
- if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || (bfd_bread (extsyms, symtab_hdr->sh_size, abfd)
- != symtab_hdr->sh_size))
- goto error_return;
- }
- }
+ dynobj = elf_hash_table(info)->dynobj;
+ ah = (struct alpha_elf_link_hash_entry *)h;
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- bfd_elf64_swap_symbol_in (abfd,
- extsyms + ELF64_R_SYM (irel->r_info),
- &isym);
- if (isym.st_shndx == SHN_UNDEF)
- info.tsec = bfd_und_section_ptr;
- else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE)
- info.tsec = bfd_section_from_elf_index (abfd, isym.st_shndx);
- 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
- continue; /* who knows. */
+ /* 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))
+ {
+ h->needs_plt = TRUE;
- 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;
+ s = elf_hash_table(info)->splt;
+ if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
+ return FALSE;
- indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info;
- h = alpha_elf_sym_hashes (abfd)[indx];
- BFD_ASSERT (h != NULL);
+ /* 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. */
- 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;
+ return TRUE;
+ }
+ else
+ h->needs_plt = FALSE;
- /* 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 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;
+ }
- 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;
- }
+ /* 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. */
- /* 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;
+ return TRUE;
+}
- symval += info.tsec->output_section->vma + info.tsec->output_offset;
- symval += irel->r_addend;
+/* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
- BFD_ASSERT(info.gotent != NULL);
+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)));
+}
- /* 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. */
+/* 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. */
- 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;
- }
- }
+static void
+elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
+{
+ 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;
- if (!elf64_alpha_size_got_sections (abfd, link_info))
- return false;
+ /* Do the merging in the superclass. */
+ _bfd_elf_link_hash_copy_indirect(info, dir, ind);
- if (info.changed_relocs)
- {
- elf_section_data (sec)->relocs = internal_relocs;
- }
- else if (free_relocs != NULL)
- {
- free (free_relocs);
- }
+ /* Merge the flags. Whee. */
+ hs->flags |= hi->flags;
- if (info.changed_contents)
- {
- elf_section_data (sec)->this_hdr.contents = info.contents;
- }
- else if (free_contents != NULL)
+ /* ??? 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
{
- if (! link_info->keep_memory)
- free (free_contents);
- else
+ struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
+
+ gsh = hs->got_entries;
+ for (gi = hi->got_entries; gi ; gi = gin)
{
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = info.contents;
+ 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;
+
+ /* And similar for the reloc entries. */
- if (free_extsyms != NULL)
+ if (hs->reloc_entries == NULL)
+ hs->reloc_entries = hi->reloc_entries;
+ else
{
- if (! link_info->keep_memory)
- free (free_extsyms);
- else
+ struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
+
+ rsh = hs->reloc_entries;
+ for (ri = hi->reloc_entries; ri ; ri = rin)
{
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) extsyms;
+ 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:;
}
}
-
- *again = info.changed_contents || info.changed_relocs;
-
- return true;
-
- error_return:
- if (free_relocs != NULL)
- free (free_relocs);
- if (free_contents != NULL)
- free (free_contents);
- if (free_extsyms != NULL)
- free (free_extsyms);
- return false;
+ hi->reloc_entries = NULL;
}
-\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
+/* Is it possible to merge two object file's .got tables? */
-#define MAX_GOT_ENTRIES (64*1024 / 8)
+static bfd_boolean
+elf64_alpha_can_merge_gots (bfd *a, bfd *b)
+{
+ int total = alpha_elf_tdata (a)->total_got_size;
+ bfd *bsub;
-#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. */
+ /* Trivial quick fallout test. */
+ if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
+ return TRUE;
-static boolean
-elf64_alpha_section_from_shdr (abfd, hdr, name)
- bfd *abfd;
- Elf64_Internal_Shdr *hdr;
- char *name;
-{
- asection *newsect;
+ /* By their nature, local .got entries cannot be merged. */
+ if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
+ return FALSE;
- /* 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)
+ /* 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)
{
- case SHT_ALPHA_DEBUG:
- if (strcmp (name, ".mdebug") != 0)
- return false;
- break;
- default:
- return false;
- }
+ 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;
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
- newsect = hdr->bfd_section;
+ 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;
- if (hdr->sh_type == SHT_ALPHA_DEBUG)
- {
- if (! bfd_set_section_flags (abfd, newsect,
- (bfd_get_section_flags (abfd, newsect)
- | SEC_DEBUGGING)))
- 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;
- return true;
-}
+ for (be = h->got_entries; be ; be = be->next)
+ {
+ if (be->use_count == 0)
+ continue;
+ if (be->gotobj != b)
+ continue;
-/* Convert Alpha specific section flags to bfd internal section flags. */
+ 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;
-static boolean
-elf64_alpha_section_flags (flags, hdr)
- flagword *flags;
- Elf64_Internal_Shdr *hdr;
-{
- if (hdr->sh_flags & SHF_ALPHA_GPREL)
- *flags |= SEC_SMALL_DATA;
+ total += alpha_got_entry_size (be->reloc_type);
+ if (total > MAX_GOT_SIZE)
+ return FALSE;
+ global_found:;
+ }
+ }
+ }
- return true;
+ 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. */
+/* Actually merge two .got tables. */
-static boolean
-elf64_alpha_fake_sections (abfd, hdr, sec)
- bfd *abfd;
- Elf64_Internal_Shdr *hdr;
- asection *sec;
+static void
+elf64_alpha_merge_gots (bfd *a, bfd *b)
{
- register const char *name;
+ int total = alpha_elf_tdata (a)->total_got_size;
+ bfd *bsub;
- name = bfd_get_section_name (abfd, sec);
+ /* Remember local expansion. */
+ {
+ int e = alpha_elf_tdata (b)->local_got_size;
+ total += e;
+ alpha_elf_tdata (a)->local_got_size += e;
+ }
- if (strcmp (name, ".mdebug") == 0)
+ 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_got_entry **local_got_entries;
+ struct alpha_elf_link_hash_entry **hashes;
+ Elf_Internal_Shdr *symtab_hdr;
+ int i, n;
- return true;
-}
+ /* 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;
-/* 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. */
+ 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;
- asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
+ 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 (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;
+ next:;
+ pbe = &be->next;
+ kill:;
+ }
}
- *secp = scomm;
- *valp = sym->st_size;
+ alpha_elf_tdata (bsub)->gotobj = a;
}
+ alpha_elf_tdata (a)->total_got_size = total;
+
+ /* Merge the two in_got chains. */
+ {
+ bfd *next;
+
+ 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;
+ }
}
-/* Create the .got section. */
+/* Calculate the offsets for the got entries. */
-static boolean
-elf64_alpha_create_got_section(abfd, info)
- bfd *abfd;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
+static bfd_boolean
+elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
+ void * arg ATTRIBUTE_UNUSED)
{
- asection *s;
-
- if (bfd_get_section_by_name (abfd, ".got"))
- return true;
+ struct alpha_elf_got_entry *gotent;
- 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;
+ for (gotent = h->got_entries; gotent; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ {
+ struct alpha_elf_obj_tdata *td;
+ bfd_size_type *plge;
- alpha_elf_tdata (abfd)->got = s;
+ td = alpha_elf_tdata (gotent->gotobj);
+ plge = &td->got->size;
+ gotent->got_offset = *plge;
+ *plge += alpha_got_entry_size (gotent->reloc_type);
+ }
- return true;
+ return TRUE;
}
-/* Create all the dynamic sections. */
-
-static boolean
-elf64_alpha_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
+static void
+elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
{
- asection *s;
- struct elf_link_hash_entry *h;
-
- /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
+ bfd *i, *got_list;
+ struct alpha_elf_link_hash_table * htab;
- 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;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
+ got_list = htab->got_list;
- /* 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;
+ /* 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;
- /* We may or may not have created a .got section for this object, but
- we definitely havn't done the rest of the work. */
+ /* Next, fill in the offsets for all the global entries. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_calc_got_offsets_for_symbol,
+ NULL);
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
+ /* 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;
- 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;
+ 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;
- /* 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;
+ local_got_entries = alpha_elf_tdata(j)->local_got_entries;
+ if (!local_got_entries)
+ continue;
- elf_hash_table (info)->hgot = h;
+ 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);
+ }
+ }
- return true;
+ alpha_elf_tdata(i)->got->size = got_offset;
+ }
}
-\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;
+/* Constructs the gots. */
+
+static bfd_boolean
+elf64_alpha_size_got_sections (struct bfd_link_info *info,
+ bfd_boolean may_merge)
{
- HDRR *symhdr;
- const struct ecoff_debug_swap *swap;
- char *ext_hdr = NULL;
+ bfd *i, *got_list, *cur_got_obj = NULL;
+ struct alpha_elf_link_hash_table * htab;
- swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- memset (debug, 0, sizeof (*debug));
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
+ got_list = htab->got_list;
- ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
- if (ext_hdr == NULL && swap->external_hdr_size != 0)
- goto error_return;
+ /* 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;
- if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
- swap->external_hdr_size)
- == false)
- goto error_return;
+ if (! is_alpha_elf (i))
+ continue;
- symhdr = &debug->symbolic_header;
- (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
+ this_got = alpha_elf_tdata (i)->gotobj;
+ if (this_got == NULL)
+ continue;
- /* 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; \
- }
+ /* We are assuming no merging has yet occurred. */
+ BFD_ASSERT (this_got == i);
- 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
+ if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
+ {
+ /* 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;
+ }
- debug->fdr = NULL;
- debug->adjust = NULL;
+ 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;
+ }
- return true;
+ /* Strange degenerate case of no got references. */
+ if (got_list == NULL)
+ return 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;
-}
+ htab->got_list = got_list;
+ }
-/* Alpha ELF local labels start with '$'. */
+ cur_got_obj = got_list;
+ if (cur_got_obj == NULL)
+ return FALSE;
-static boolean
-elf64_alpha_is_local_label_name (abfd, name)
- bfd *abfd ATTRIBUTE_UNUSED;
- const char *name;
-{
- return name[0] == '$';
-}
+ if (may_merge)
+ {
+ i = alpha_elf_tdata(cur_got_obj)->got_link_next;
+ while (i != NULL)
+ {
+ if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ {
+ elf64_alpha_merge_gots (cur_got_obj, i);
-/* 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. */
+ 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;
+ }
+ }
+ }
-struct mips_elf_find_line
-{
- struct ecoff_debug_info d;
- struct ecoff_find_line i;
-};
+ /* Once the gots have been merged, fill in the got offsets for
+ everything therein. */
+ elf64_alpha_calc_got_offsets (info);
-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;
-{
- asection *msec;
+ return TRUE;
+}
- 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;
+static bfd_boolean
+elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h,
+ void * data)
+{
+ asection *splt = (asection *) data;
+ struct alpha_elf_got_entry *gotent;
+ bfd_boolean saw_one = FALSE;
- msec = bfd_get_section_by_name (abfd, ".mdebug");
- if (msec != 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;
+ /* If we didn't need an entry before, we still don't. */
+ if (!h->root.needs_plt)
+ return TRUE;
- /* 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;
+ /* 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;
+ }
- 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);
+ /* If there weren't any, there's no longer a need for the PLT entry. */
+ if (!saw_one)
+ h->root.needs_plt = FALSE;
- fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
- if (fi == NULL)
- {
- msec->flags = origflags;
- return false;
- }
+ return TRUE;
+}
- if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
- {
- msec->flags = origflags;
- return false;
- }
+/* Called from relax_section to rebuild the PLT in light of potential changes
+ in the function's status. */
- /* 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);
+static void
+elf64_alpha_size_plt_section (struct bfd_link_info *info)
+{
+ asection *splt, *spltrel, *sgotplt;
+ unsigned long entries;
+ struct alpha_elf_link_hash_table * htab;
- elf_tdata (abfd)->find_line_info = fi;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
- /* 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. */
- }
+ splt = elf_hash_table(info)->splt;
+ if (splt == NULL)
+ return;
- if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
- &fi->i, filename_ptr, functionname_ptr,
- line_ptr))
- {
- msec->flags = origflags;
- return true;
- }
+ splt->size = 0;
- msec->flags = origflags;
- }
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_size_plt_section_1, splt);
- /* Fall back on the generic ELF find_nearest_line routine. */
+ /* 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
+ entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
+ }
+ spltrel->size = entries * sizeof (Elf64_External_Rela);
- return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr);
+ /* 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;
+ }
}
-\f
-/* Structure used to pass information to alpha_elf_output_extsym. */
-struct extsym_info
+static bfd_boolean
+elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
{
- bfd *abfd;
- struct bfd_link_info *info;
- struct ecoff_debug_info *debug;
- const struct ecoff_debug_swap *swap;
- boolean failed;
-};
+ bfd *i;
+ struct alpha_elf_link_hash_table * htab;
-static boolean
-elf64_alpha_output_extsym (h, data)
- struct alpha_elf_link_hash_entry *h;
- PTR data;
-{
- struct extsym_info *einfo = (struct extsym_info *) data;
- boolean strip;
- asection *sec, *output_section;
+ if (bfd_link_relocatable (info))
+ return TRUE;
- 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;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
- if (strip)
- return true;
+ if (!elf64_alpha_size_got_sections (info, TRUE))
+ return FALSE;
- if (h->esym.ifd == -2)
+ /* Allocate space for all of the .got subsections. */
+ i = htab->got_list;
+ for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
{
- 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;
+ 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_defined
- && h->root.root.type != bfd_link_hash_defweak)
- h->esym.asym.sc = scAbs;
- else
- {
- const char *name;
-
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
-
- /* 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);
-
- 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;
- }
- }
+ return TRUE;
+}
- h->esym.asym.reserved = 0;
- h->esym.asym.index = indexNil;
- }
+/* The number of dynamic relocations required by a static relocation. */
- 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)
+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;
-
- 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;
+ /* 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;
}
- else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 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;
+
+ /* 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))
+ return TRUE;
+}
+
+/* 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;
+ unsigned long entries;
+
+ /* 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;
+
+ /* 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;
+
+ 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));
+
+ if (entries > 0)
{
- einfo->failed = true;
- return false;
+ asection *srel = elf_hash_table(info)->srelgot;
+ BFD_ASSERT (srel != NULL);
+ srel->size += sizeof (Elf64_External_Rela) * entries;
}
- return true;
+ return TRUE;
}
-/* FIXME: Create a runtime procedure table from the .mdebug section.
+/* Set the sizes of the dynamic relocation sections. */
-static boolean
-mips_elf_create_procedure_table (handle, abfd, info, s, debug)
- PTR handle;
- bfd *abfd;
- struct bfd_link_info *info;
- asection *s;
- struct ecoff_debug_info *debug;
-*/
-\f
-/* Handle dynamic relocations when doing an Alpha ELF link. */
-
-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 void
+elf64_alpha_size_rela_got_section (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;
- struct alpha_elf_got_entry **local_got_entries;
- const Elf_Internal_Rela *rel, *relend;
- int got_created;
- bfd_size_type amt;
-
- if (info->relocateable)
- return true;
+ unsigned long entries;
+ bfd *i;
+ asection *srel;
+ struct alpha_elf_link_hash_table * htab;
- dynobj = elf_hash_table(info)->dynobj;
- if (dynobj == NULL)
- elf_hash_table(info)->dynobj = dynobj = abfd;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
- sreloc = NULL;
- rel_sec_name = NULL;
- symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
- sym_hashes = alpha_elf_sym_hashes(abfd);
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
- got_created = 0;
+ /* Shared libraries often require RELATIVE relocs, and some relocs
+ require attention for the main application as well. */
- relend = relocs + sec->reloc_count;
- for (rel = relocs; rel < relend; ++rel)
+ entries = 0;
+ for (i = htab->got_list;
+ i ; i = alpha_elf_tdata(i)->got_link_next)
{
- unsigned long r_symndx, r_type;
- struct alpha_elf_link_hash_entry *h;
+ bfd *j;
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
+ for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
{
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ struct alpha_elf_got_entry **local_got_entries, *gotent;
+ int k, n;
- 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;
+ local_got_entries = alpha_elf_tdata(j)->local_got_entries;
+ if (!local_got_entries)
+ continue;
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
+ 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)));
}
- r_type = ELF64_R_TYPE (rel->r_info);
+ }
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- {
- struct alpha_elf_got_entry *gotent;
- int flags = 0;
+ srel = elf_hash_table(info)->srelgot;
+ if (!srel)
+ {
+ BFD_ASSERT (entries == 0);
+ return;
+ }
+ srel->size = sizeof (Elf64_External_Rela) * entries;
- if (h)
- {
- /* Search for and possibly create a got entry. */
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- if (gotent->gotobj == abfd &&
- gotent->addend == rel->r_addend)
- break;
+ /* Now do the non-local symbols. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_size_rela_got_1, info);
+}
- if (!gotent)
- {
- amt = sizeof (struct alpha_elf_got_entry);
- gotent = ((struct alpha_elf_got_entry *)
- bfd_alloc (abfd, amt));
- if (!gotent)
- return false;
-
- gotent->gotobj = abfd;
- gotent->addend = rel->r_addend;
- gotent->got_offset = -1;
- gotent->flags = 0;
- gotent->use_count = 1;
-
- gotent->next = h->got_entries;
- h->got_entries = gotent;
-
- alpha_elf_tdata (abfd)->total_got_entries++;
- }
- else
- gotent->use_count += 1;
- }
- else
- {
- /* This is a local .got entry -- record for merge. */
- if (!local_got_entries)
- {
- bfd_size_type size;
- size = symtab_hdr->sh_info;
- size *= sizeof (struct alpha_elf_got_entry *);
-
- local_got_entries = ((struct alpha_elf_got_entry **)
- bfd_alloc (abfd, size));
- if (!local_got_entries)
- return false;
-
- memset (local_got_entries, 0, (size_t) size);
- alpha_elf_tdata (abfd)->local_got_entries =
- local_got_entries;
- }
+/* Set the sizes of the dynamic sections. */
- for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)];
- gotent != NULL && gotent->addend != rel->r_addend;
- gotent = gotent->next)
- continue;
- if (!gotent)
- {
- amt = sizeof (struct alpha_elf_got_entry);
- gotent = ((struct alpha_elf_got_entry *)
- bfd_alloc (abfd, amt));
- if (!gotent)
- return false;
-
- gotent->gotobj = abfd;
- gotent->addend = rel->r_addend;
- gotent->got_offset = -1;
- gotent->flags = 0;
- gotent->use_count = 1;
-
- gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)];
- local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent;
-
- alpha_elf_tdata(abfd)->total_got_entries++;
- alpha_elf_tdata(abfd)->n_local_got_entries++;
- }
- else
- gotent->use_count += 1;
- }
+static bfd_boolean
+elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *s;
+ bfd_boolean relplt, relocs;
+ struct alpha_elf_link_hash_table * htab;
- /* 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. */
- if (rel+1 < relend
- && ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE)
- {
- do
- {
- ++rel;
- if (rel->r_addend >= 1 && rel->r_addend <= 3)
- flags |= 1 << rel->r_addend;
- }
- while (rel+1 < relend &&
- ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE);
- }
- else
- {
- /* No LITUSEs -- presumably the address is not being
- loaded for nothing. */
- flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
- }
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
- gotent->flags |= flags;
- if (h)
- {
- /* Make a guess as to whether a .plt entry will be needed. */
- if ((h->flags |= 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;
- }
- }
- /* FALLTHRU */
+ dynobj = elf_hash_table(info)->dynobj;
+ BFD_ASSERT(dynobj != NULL);
- case R_ALPHA_GPDISP:
- case R_ALPHA_GPREL16:
- case R_ALPHA_GPREL32:
- case R_ALPHA_GPRELHIGH:
- case R_ALPHA_GPRELLOW:
- /* We don't actually use the .got here, but the sections must
- be created before the linker maps input sections to output
- sections. */
- if (!got_created)
- {
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Set the contents of the .interp section to the interpreter. */
+ if (bfd_link_executable (info) && !info->nointerp)
+ {
+ s = bfd_get_linker_section (dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
- /* 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;
+ /* 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);
- got_created = 1;
- }
- 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_SREL16:
- case R_ALPHA_SREL32:
- case R_ALPHA_SREL64:
- if (h == NULL)
- break;
- /* FALLTHRU */
+ /* 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_REFLONG:
- case R_ALPHA_REFQUAD:
- 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 (!(s->flags & SEC_LINKER_CREATED))
+ continue;
- /* 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)
+ /* 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 (CONST_STRNEQ (name, ".rela"))
+ {
+ if (s->size != 0)
{
- 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 (strcmp (name, ".rela.plt") == 0)
+ relplt = TRUE;
+ else
+ relocs = TRUE;
+
+ /* 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 (s->size == 0)
+ {
+ /* 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;
+ }
+ }
- 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. */
+ 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)
- struct alpha_elf_reloc_entry *rent;
+ if (bfd_link_executable (info))
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
- for (rent = h->reloc_entries; rent; rent = rent->next)
- if (rent->rtype == r_type && rent->srel == sreloc)
- break;
+ 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;
- if (!rent)
- {
- amt = sizeof (struct alpha_elf_reloc_entry);
- rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
- if (!rent)
- return false;
+ if (elf64_alpha_use_secureplt
+ && !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
+ return FALSE;
+ }
- rent->srel = sreloc;
- rent->rtype = r_type;
- rent->count = 1;
- rent->reltext = (sec->flags & SEC_READONLY) != 0;
+ if (relocs)
+ {
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
+ return FALSE;
- rent->next = h->reloc_entries;
- h->reloc_entries = rent;
- }
- else
- rent->count++;
- }
- else if (info->shared && (sec->flags & SEC_ALLOC))
+ if (info->flags & DF_TEXTREL)
{
- /* 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)
- info->flags |= DF_TEXTREL;
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
}
- break;
}
}
+#undef add_dynamic_entry
- return true;
+ return TRUE;
}
+\f
+/* These functions do relaxation for Alpha ELF.
-/* 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. */
+ 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.
-static boolean
-elf64_alpha_adjust_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
-{
- bfd *dynobj;
- asection *s;
- struct alpha_elf_link_hash_entry *ah;
+ 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. */
- dynobj = elf_hash_table(info)->dynobj;
- ah = (struct alpha_elf_link_hash_entry *)h;
+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;
+};
- /* Now that we've seen all of the input symbols, finalize our decision
- about whether this symbol should get a .plt entry. */
-
- if (h->root.type != bfd_link_hash_undefweak
- && 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))
- /* 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)
+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)
{
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ if (rel->r_offset == offset
+ && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
+ return rel;
+ ++rel;
+ }
+ return NULL;
+}
- s = bfd_get_section_by_name(dynobj, ".plt");
- if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
- return false;
+static bfd_boolean
+elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
+ Elf_Internal_Rela *irel, unsigned long r_type)
+{
+ unsigned int insn;
+ bfd_signed_vma disp;
+
+ /* Get the instruction. */
+ insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
+
+ if (insn >> 26 != OP_LDQ)
+ {
+ 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;
+ {
+ bfd_vma dtp_base, tp_base;
- /* 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 (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);
+
+ insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
+
+ 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;
+ }
+ }
+
+ if (disp < -0x8000 || disp >= 0x8000)
+ return TRUE;
+
+ bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
+ info->changed_contents = TRUE;
+
+ /* Reduce the use count on this got entry by one, possibly
+ eliminating it. */
+ if (--info->gotent->use_count == 0)
{
- 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;
+ 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;
}
- /* 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. */
+ /* 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;
- return true;
-}
+ /* ??? 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.
-/* 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. */
+ 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.
-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;
+ Any such jsr insn can be replaced by a bsr if it is in range.
- 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);
+ This would mean that we'd have to _add_ relocations, the pain of
+ which gives one pause. */
- /* Merge the flags. Whee. */
+ return TRUE;
+}
- hs->flags |= hi->flags;
+static bfd_vma
+elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
+{
+ /* 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. */
- /* Merge the .got entries. Cannibalize the old symbol's list in
- doing so, since we don't need it anymore. */
+ /* 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;
- if (hs->got_entries == NULL)
- hs->got_entries = hi->got_entries;
+ /* 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)
+ ;
+
+ /* Otherwise, we may be able to identify a GP load in the first two
+ words, which we can then skip. */
else
{
- struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
+ Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
+ bfd_vma ofs;
- gsh = hs->got_entries;
- for (gi = hi->got_entries; gi ; gi = gin)
+ /* Load the relocations from the section that the target symbol is in. */
+ if (info->sec == info->tsec)
{
- gin = gi->next;
- for (gs = gsh; gs ; gs = gs->next)
- if (gi->gotobj == gs->gotobj && gi->addend == gs->addend)
- goto got_found;
- gi->next = hs->got_entries;
- hs->got_entries = gi;
- got_found:;
+ 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);
}
- }
- hi->got_entries = NULL;
- /* And similar for the reloc entries. */
+ /* Recover the symbol's offset within the section. */
+ ofs = (symval - info->tsec->output_section->vma
+ - info->tsec->output_offset);
- if (hs->reloc_entries == NULL)
- hs->reloc_entries = hi->reloc_entries;
- else
- {
- struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
+ /* Look for a GPDISP reloc. */
+ gpdisp = (elf64_alpha_find_reloc_at_ofs
+ (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
- rsh = hs->reloc_entries;
- for (ri = hi->reloc_entries; ri ; ri = rin)
+ if (!gpdisp || gpdisp->r_addend != 4)
{
- 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:;
+ if (tsec_free)
+ free (tsec_free);
+ return 0;
}
+ if (tsec_free)
+ free (tsec_free);
}
- hi->reloc_entries = NULL;
- 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;
+
+ return symval + 8;
}
-/* Is it possible to merge two object file's .got tables? */
+static bfd_boolean
+elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
+ bfd_vma symval, Elf_Internal_Rela *irel)
+{
+ 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;
+
+ lit_insn = bfd_get_32 (abfd, contents + irel->r_offset);
+ if (lit_insn >> 26 != OP_LDQ)
+ {
+ _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;
+ }
+
+ /* Can't relax dynamic symbols. */
+ if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
+ return TRUE;
+
+ 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;
+
+ /* 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;
+ }
+
+ /* A little preparation for the loop... */
+ disp = symval - info->gp;
+
+ 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;
+
+ insn = bfd_get_32 (abfd, contents + urel_r_offset);
-static boolean
-elf64_alpha_can_merge_gots (a, b)
- bfd *a, *b;
-{
- int total = alpha_elf_tdata (a)->total_got_entries;
- bfd *bsub;
+ 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;
- /* Trivial quick fallout test. */
- if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES)
- return true;
+ case LITUSE_ALPHA_BASE:
+ /* We may only create GPREL relocs during the second pass. */
+ if (relax_pass == 0)
+ {
+ all_optimized = FALSE;
+ break;
+ }
- /* By their nature, local .got entries cannot be merged. */
- if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES)
- return false;
+ /* We can always optimize 16-bit displacements. */
- /* 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)
- {
- 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;
+ /* 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;
- 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;
+ xdisp = disp + insn_disp;
+ fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
+ fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
+ && xdisp < 0x7fff8000);
- 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;
+ 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;
+ }
- for (be = h->got_entries; be ; be = be->next)
+ /* If all mem+byte, we can optimize 32-bit mem displacements. */
+ else if (fits32 && !(flags & ~6))
{
- if (be->use_count == 0)
- continue;
- if (be->gotobj != b)
- continue;
+ /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
- for (ae = h->got_entries; ae ; ae = ae->next)
- if (ae->gotobj == a && ae->addend == be->addend)
- goto global_found;
+ 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;
- if (++total > MAX_GOT_ENTRIES)
- return false;
- global_found:;
+ /* 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;
- return true;
-}
+ case LITUSE_ALPHA_BYTOFF:
+ /* We can always optimize byte instructions. */
-/* Actually merge two .got tables. */
+ /* FIXME: sanity check the insn for byte op. Check that the
+ literal dest reg is indeed Rb in the byte insn. */
-static void
-elf64_alpha_merge_gots (a, b)
- bfd *a, *b;
-{
- int total = alpha_elf_tdata (a)->total_got_entries;
- bfd *bsub;
+ 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;
- /* Remember local expansion. */
- {
- int e = alpha_elf_tdata (b)->n_local_got_entries;
- total += e;
- alpha_elf_tdata (a)->n_local_got_entries += e;
- }
+ case LITUSE_ALPHA_JSR:
+ case LITUSE_ALPHA_TLSGD:
+ case LITUSE_ALPHA_TLSLDM:
+ case LITUSE_ALPHA_JSRDIRECT:
+ {
+ bfd_vma optdest, org;
+ bfd_signed_vma odisp;
- 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;
+ /* 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);
- /* 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;
- }
- }
+ changed_contents = TRUE;
+ break;
+ }
- /* Merge the global .got entries. */
- hashes = alpha_elf_sym_hashes (bsub);
- symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
+ /* 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;
- 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;
+ if (odisp >= -0x400000 && odisp < 0x400000)
+ {
+ Elf_Internal_Rela *xrel;
- 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;
+ /* 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;
- 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;
+ nrel = *urel;
+ nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_BRADDR);
+ nrel.r_addend = irel->r_addend;
- for (ae = *start; ae ; ae = ae->next)
- if (ae->gotobj == a && ae->addend == be->addend)
- {
- ae->flags |= be->flags;
- ae->use_count += be->use_count;
- *pbe = be->next;
- goto global_found;
- }
- be->gotobj = a;
- total += 1;
+ if (optdest)
+ nrel.r_addend += optdest - symval;
+ else
+ all_optimized = FALSE;
- global_found:;
- }
- }
+ /* 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);
- alpha_elf_tdata (bsub)->gotobj = a;
- }
- alpha_elf_tdata (a)->total_got_entries = total;
+ /* 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;
- /* Merge the two in_got chains. */
- {
- bfd *next;
+ info->changed_relocs = TRUE;
+ }
+ else
+ all_optimized = FALSE;
- bsub = a;
- while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
- bsub = next;
+ /* 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_tdata (bsub)->in_got_link_next = b;
- }
-}
+ /* 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);
-/* Calculate the offsets for the got entries. */
+ gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ changed_contents = TRUE;
+ changed_relocs = TRUE;
+ }
+ }
+ }
+ }
+ break;
+ }
+ }
-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;
+ /* If we reused the literal instruction, we must have optimized all. */
+ BFD_ASSERT(!lit_reused || all_optimized);
- 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 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)
+ {
+ 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;
+ }
- gotent->got_offset = *plge;
- *plge += 8;
- }
+ /* 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);
+ changed_relocs = TRUE;
+
+ bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset);
+ changed_contents = TRUE;
+ }
+ }
+
+ 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 void
-elf64_alpha_calc_got_offsets (info)
- 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, *got_list = alpha_elf_hash_table(info)->got_list;
+ bfd_byte *pos[5];
+ unsigned int insn, tlsgd_reg;
+ Elf_Internal_Rela *gpdisp, *hint;
+ bfd_boolean dynamic, use_gottprel;
+ unsigned long new_symndx;
- /* 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;
+ dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
- /* 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);
+ /* 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))
+ ;
- /* Finally, fill in the offsets for the local entries. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
+ /* 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))
+ ;
+
+ /* 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])
{
- bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
- bfd *j;
+ bfd_byte *tmp = pos[0];
+ pos[0] = pos[1];
+ pos[1] = tmp;
+ }
+ if (pos[1] >= pos[2] || pos[2] >= pos[3])
+ return TRUE;
- 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;
+ /* 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);
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
- continue;
+ if (--lit_gotent->use_count == 0)
+ {
+ int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ }
+ }
- 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 += 8;
- }
- }
+ /* 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)))
+ {
+ case 1:
+ {
+ bfd_vma tp_base;
+ bfd_signed_vma disp;
- alpha_elf_tdata(i)->got->_raw_size = got_offset;
- alpha_elf_tdata(i)->got->_cooked_size = got_offset;
- }
-}
+ BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
+ tp_base = alpha_get_tprel_base (info->link_info);
+ disp = symval - tp_base;
-/* Constructs the gots. */
+ 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]);
-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;
+ 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 */
- got_list = alpha_elf_hash_table (info)->got_list;
+ default:
+ use_gottprel = TRUE;
- /* 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;
+ 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]);
- /* We are assuming no merging has yet ocurred. */
- BFD_ASSERT (this_got == i);
+ 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;
+ }
+
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
+
+ insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
- if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
- {
- /* 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_entries * 8);
- return false;
- }
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
- 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;
- }
+ irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- /* Strange degenerate case of no got references. */
- if (got_list == NULL)
- return true;
+ 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);
- alpha_elf_hash_table (info)->got_list = got_list;
+ info->changed_contents = TRUE;
+ info->changed_relocs = TRUE;
- /* Force got offsets to be recalculated. */
- something_changed = 1;
+ /* Reduce the use count on the TLSGD/TLSLDM relocation. */
+ if (--info->gotent->use_count == 0)
+ {
+ 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;
}
- cur_got_obj = got_list;
- i = alpha_elf_tdata(cur_got_obj)->got_link_next;
- while (i != NULL)
+ /* If we've switched to a GOTTPREL relocation, increment the reference
+ count on that got entry. */
+ if (use_gottprel)
{
- if (elf64_alpha_can_merge_gots (cur_got_obj, i))
- {
- 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;
- }
+ 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
{
- cur_got_obj = i;
- i = alpha_elf_tdata(i)->got_link_next;
+ 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;
}
}
- /* Once the gots have been merged, fill in the got offsets for
- everything therein. */
- if (1 || something_changed)
- elf64_alpha_calc_got_offsets (info);
-
- return true;
+ return TRUE;
}
-static boolean
-elf64_alpha_always_size_sections (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_relax_section (bfd *abfd, asection *sec,
+ struct bfd_link_info *link_info, bfd_boolean *again)
{
- bfd *i;
+ 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 (info->relocateable)
- return true;
+ htab = alpha_elf_hash_table (link_info);
+ if (htab == NULL)
+ return FALSE;
- /* 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);
+ /* There's nothing to change, yet. */
+ *again = FALSE;
- if (!elf64_alpha_size_got_sections (output_bfd, info))
- return 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;
- /* 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)
+ 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)
{
- asection *s = alpha_elf_tdata(i)->got;
- if (s->_raw_size > 0)
+ 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)
{
- s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
- if (s->contents == NULL)
- return false;
+ 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;
-/* Work out the sizes of the dynamic relocation entries. */
+ /* 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_calc_dynrel_sizes (h, info)
- struct alpha_elf_link_hash_entry *h;
- struct bfd_link_info *info;
-{
- /* 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))
+ 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;
+
+ /* 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)
{
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ asection *sgot = alpha_elf_tdata (info.gotobj)->got;
+ info.gp = (sgot->output_section->vma
+ + sgot->output_offset
+ + 0x8000);
}
- /* 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. */
+ /* Get the section contents. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ info.contents = elf_section_data (sec)->this_hdr.contents;
+ else
+ {
+ if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
+ goto error_return;
+ }
- if (alpha_elf_dynamic_symbol_p (&h->root, info) || info->shared)
+ for (irel = internal_relocs; irel < irelend; irel++)
{
- struct alpha_elf_reloc_entry *relent;
- bfd *dynobj;
+ bfd_vma symval;
struct alpha_elf_got_entry *gotent;
- bfd_size_type count;
- asection *srel;
-
- for (relent = h->reloc_entries; relent; relent = relent->next)
- if (relent->rtype == R_ALPHA_REFLONG
- || relent->rtype == R_ALPHA_REFQUAD)
- {
- relent->srel->_raw_size +=
- sizeof (Elf64_External_Rela) * relent->count;
- if (relent->reltext)
- info->flags |= DT_TEXTREL;
- }
-
- dynobj = elf_hash_table(info)->dynobj;
- count = 0;
-
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- count++;
-
- /* 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)
- count--;
+ unsigned long r_type = ELF64_R_TYPE (irel->r_info);
+ unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
- if (count > 0)
+ /* Early exit for unhandled or unrelaxable relocations. */
+ if (r_type != R_ALPHA_LITERAL)
{
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf64_External_Rela) * count;
+ /* 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;
}
- }
- return true;
-}
+ /* Get the value of the symbol referred to by the reloc. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
-/* Set the sizes of the dynamic sections. */
+ /* 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;
+ }
-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;
+ isym = isymbuf + r_symndx;
- dynobj = elf_hash_table(info)->dynobj;
- BFD_ASSERT(dynobj != NULL);
+ /* 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);
+ }
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (!info->shared)
- {
- 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;
+ info.h = NULL;
+ info.other = isym->st_other;
+ if (local_got_entries)
+ info.first_gotent = &local_got_entries[r_symndx];
+ else
+ {
+ info.first_gotent = &info.gotent;
+ info.gotent = NULL;
+ }
}
-
- /* 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);
-
- /* When building shared libraries, each local .got entry needs a
- RELATIVE reloc. */
- if (info->shared)
+ else
{
- bfd *i;
- asection *srel;
- bfd_size_type count;
-
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (srel != NULL);
+ unsigned long indx;
+ struct alpha_elf_link_hash_entry *h;
- for (i = alpha_elf_hash_table(info)->got_list, count = 0;
- i != NULL;
- i = alpha_elf_tdata(i)->got_link_next)
- count += alpha_elf_tdata(i)->n_local_got_entries;
+ indx = r_symndx - symtab_hdr->sh_info;
+ h = alpha_elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
- srel->_raw_size += count * sizeof (Elf64_External_Rela);
- }
- }
- /* else we're not dynamic and by definition we don't need such things. */
+ 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;
- /* 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)
- {
- const char *name;
- boolean strip;
+ /* If the symbol is undefined, we can't do anything with it. */
+ if (h->root.root.type == bfd_link_hash_undefined)
+ continue;
- if (!(s->flags & SEC_LINKER_CREATED))
- continue;
+ /* 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;
+ }
- /* 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);
+ info.h = h;
+ info.other = h->root.other;
+ info.first_gotent = &h->got_entries;
+ }
- /* 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. */
+ /* 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;
- strip = false;
+ symval += info.tsec->output_section->vma + info.tsec->output_offset;
+ symval += irel->r_addend;
- if (strncmp (name, ".rela", 5) == 0)
+ switch (r_type)
{
- strip = (s->_raw_size == 0);
+ case R_ALPHA_LITERAL:
+ BFD_ASSERT(info.gotent != NULL);
- if (!strip)
+ /* 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 (strcmp(name, ".rela.plt") == 0)
- relplt = true;
-
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
+ 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;
}
- else if (strcmp (name, ".plt") != 0)
+ }
+
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (!link_info->keep_memory)
+ free (isymbuf);
+ else
{
- /* It's not one of our dynamic sections, so don't allocate space. */
- continue;
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
}
+ }
- if (strip)
- _bfd_strip_section_from_output (info, s);
+ 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
{
- /* 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;
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = info.contents;
}
}
- if (elf_hash_table (info)->dynamic_sections_created)
+ if (elf_section_data (sec)->relocs != internal_relocs)
{
- /* 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))
+ if (!info.changed_relocs)
+ free (internal_relocs);
+ else
+ elf_section_data (sec)->relocs = internal_relocs;
+ }
+
+ *again = info.changed_contents || info.changed_relocs;
+
+ return TRUE;
+
+ 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. */
+
+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;
+
+ BFD_ASSERT (srel != NULL);
+
+ outrel.r_info = ELF64_R_INFO (dynindx, rtype);
+ outrel.r_addend = addend;
+
+ 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));
+
+ 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);
+}
+
+/* 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++)
+ {
+ 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_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- asection *sec, *sgot, *srel, *srelgot;
+ asection *sgot, *srel, *srelgot;
bfd *dynobj, *gotobj;
- bfd_vma gp;
- boolean ret_val = true;
+ bfd_vma gp, tp_base, dtp_base;
+ struct alpha_elf_got_entry **local_got_entries;
+ bfd_boolean ret_val;
+
+ 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. */
+
+ ret_val = TRUE;
+
+ symtab_hdr = &elf_symtab_hdr (input_bfd);
- srelgot = srel = NULL;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
dynobj = elf_hash_table (info)->dynobj;
- if (dynobj)
+ srelgot = elf_hash_table (info)->srelgot;
+
+ if (input_section->flags & SEC_ALLOC)
{
- srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+ 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. */
- sgot = NULL;
- gp = 0;
gotobj = alpha_elf_tdata (input_bfd)->gotobj;
if (gotobj)
{
_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++)
{
- int r_type;
+ 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;
- struct alpha_elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
- bfd_vma relocation;
+ Elf_Internal_Sym *sym = NULL;
+ asection *sec = NULL;
+ bfd_vma value;
bfd_vma addend;
- bfd_reloc_status_type r;
+ 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 < 0 || r_type >= (int) R_ALPHA_max)
+ if (r_type >= R_ALPHA_max)
{
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: unsupported relocation type %#x"),
+ input_bfd, (int) r_type);
bfd_set_error (bfd_error_bad_value);
- return false;
+ ret_val = FALSE;
+ continue;
}
- howto = elf64_alpha_howto_table + r_type;
+ 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;
+ /* 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)
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ asection *msec;
+ sym = local_syms + r_symndx;
+ sec = local_sections[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
+ && sec->sec_info_type == SEC_INFO_TYPE_MERGE
+ && gotent
+ && !gotent->reloc_xlated)
{
- sym = local_syms + r_symndx;
- if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
+ struct alpha_elf_got_entry *ent;
+
+ for (ent = gotent; ent; ent = ent->next)
{
- sec = local_sections[r_symndx];
- rel->r_addend += sec->output_offset + sym->st_value;
+ ent->reloc_xlated = 1;
+ if (ent->use_count == 0)
+ continue;
+ msec = sec;
+ ent->addend =
+ _bfd_merged_section_offset (output_bfd, &msec,
+ elf_section_data (sec)->
+ sec_info,
+ sym->st_value + ent->addend);
+ ent->addend -= sym->st_value;
+ ent->addend += msec->output_section->vma
+ + msec->output_offset
+ - sec->output_section->vma
+ - sec->output_offset;
}
}
- continue;
- }
-
- /* This is a final link. */
-
- h = NULL;
- sym = NULL;
- sec = NULL;
-
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
+ 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);
- if (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- {
- sec = h->root.root.u.def.section;
+ if (warned)
+ continue;
- if (sec->output_section == NULL)
- relocation = 0;
- else
- {
- relocation = (h->root.root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- }
- }
- else if (h->root.root.type == bfd_link_hash_undefweak)
- relocation = 0;
- else if (info->shared
- && (!info->symbolic || info->allow_shlib_undefined)
- && !info->no_undefined
- && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
- relocation = 0;
- 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)))))
- ret_val = false;
- relocation = 0;
- }
+ 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;
+
+ /* Search for the proper got entry. */
+ for (; gotent ; gotent = gotent->next)
+ if (gotent->gotobj == gotobj
+ && gotent->reloc_type == r_type
+ && gotent->addend == addend)
+ break;
switch (r_type)
{
BFD_ASSERT(gp != 0);
- relocation = (input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset);
+ value = (input_section->output_section->vma
+ + input_section->output_offset
+ + rel->r_offset);
- p_ldah = contents + rel->r_offset - input_section->vma;
+ p_ldah = contents + rel->r_offset;
p_lda = p_ldah + rel->r_addend;
- r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation,
+ r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
p_ldah, p_lda);
}
break;
case R_ALPHA_LITERAL:
- {
- struct alpha_elf_got_entry *gotent;
- boolean dynamic_symbol;
-
- BFD_ASSERT(sgot != NULL);
- BFD_ASSERT(gp != 0);
-
- if (h != NULL)
- {
- gotent = h->got_entries;
- dynamic_symbol = alpha_elf_dynamic_symbol_p (&h->root, info);
- }
- else
- {
- gotent = (alpha_elf_tdata(input_bfd)->
- local_got_entries[r_symndx]);
- dynamic_symbol = false;
-
- /* 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->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_XLATED) == 0)
- {
- struct alpha_elf_got_entry *ent;
- asection *msec;
-
- for (ent = gotent; ent; ent = ent->next)
- {
- ent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_XLATED;
- if (ent->use_count == 0)
- continue;
- msec = sec;
- ent->addend =
- _bfd_merged_section_offset (output_bfd, &msec,
- elf_section_data (sec)->
- sec_info,
- sym->st_value
- + ent->addend,
- (bfd_vma) 0);
- ent->addend -= sym->st_value;
- ent->addend += msec->output_section->vma
- + msec->output_offset
- - sec->output_section->vma
- - sec->output_offset;
- }
- }
- }
-
- BFD_ASSERT(gotent != NULL);
-
- while (gotent->gotobj != gotobj || gotent->addend != addend)
- gotent = gotent->next;
-
- BFD_ASSERT(gotent->use_count >= 1);
-
- /* Initialize the .got entry's value. */
- if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE))
- {
- bfd_put_64 (output_bfd, relocation + addend,
- sgot->contents + gotent->got_offset);
-
- /* 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)
- {
- 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 = relocation + addend;
-
- 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);
- }
+ BFD_ASSERT(sgot != NULL);
+ BFD_ASSERT(gp != 0);
+ BFD_ASSERT(gotent != NULL);
+ BFD_ASSERT(gotent->use_count >= 1);
- gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE;
- }
+ if (!gotent->reloc_done)
+ {
+ gotent->reloc_done = 1;
+
+ bfd_put_64 (output_bfd, value,
+ sgot->contents + gotent->got_offset);
+
+ /* If the symbol has been forced local, output a
+ RELATIVE reloc, otherwise it will be handled in
+ finish_dynamic_symbol. */
+ 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);
+ }
- /* Figure the gprel relocation. */
- addend = 0;
- relocation = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- relocation -= gp;
- }
- /* overflow handled by _bfd_final_link_relocate */
+ value = (sgot->output_section->vma
+ + sgot->output_offset
+ + gotent->got_offset);
+ value -= gp;
goto default_reloc;
- case R_ALPHA_GPREL16:
case R_ALPHA_GPREL32:
+ case R_ALPHA_GPREL16:
case R_ALPHA_GPRELLOW:
- if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
- {
- (*_bfd_error_handler)
- (_("%s: gp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
+ if (dynamic_symbol_p)
+ {
+ _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);
- relocation -= gp;
+ value -= gp;
goto default_reloc;
case R_ALPHA_GPRELHIGH:
- if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
- {
- (*_bfd_error_handler)
- (_("%s: gp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
- }
+ if (dynamic_symbol_p)
+ {
+ _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);
- relocation -= gp;
- relocation += addend;
- addend = 0;
- relocation = (((bfd_signed_vma) relocation >> 16)
- + ((relocation >> 15) & 1));
+ value -= gp;
+ value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
goto default_reloc;
case R_ALPHA_HINT:
/* A call to a dynamic symbol is definitely out of range of
the 16-bit displacement. Don't bother writing anything. */
- if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
+ if (dynamic_symbol_p)
{
r = bfd_reloc_ok;
break;
}
- /* FALLTHRU */
+ /* The regular PC-relative stuff measures from the start of
+ the instruction rather than the end. */
+ value -= 4;
+ goto default_reloc;
case R_ALPHA_BRADDR:
+ if (dynamic_symbol_p)
+ {
+ _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. */
- addend -= 4;
+ value -= 4;
goto default_reloc;
+ case R_ALPHA_BRSGP:
+ {
+ int other;
+ const char *name;
+
+ /* 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
+ 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
+ /* 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. */
+ if (h != NULL)
+ other = h->root.other;
+ else
+ other = sym->st_other;
+ switch (other & STO_ALPHA_STD_GPLOAD)
+ {
+ case STO_ALPHA_NOPV:
+ break;
+ case STO_ALPHA_STD_GPLOAD:
+ value += 8;
+ break;
+ default:
+ if (h != NULL)
+ name = h->root.root.root.string;
+ else
+ {
+ name = (bfd_elf_string_from_elf_section
+ (input_bfd, symtab_hdr->sh_link, sym->st_name));
+ if (name == NULL)
+ name = _("<unknown>");
+ else if (name[0] == 0)
+ name = bfd_section_name (sec);
+ }
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: !samegp reloc against symbol without .prologue: %s"),
+ input_bfd, name);
+ ret_val = FALSE;
+ break;
+ }
+
+ goto default_reloc;
+ }
+
case R_ALPHA_REFLONG:
case R_ALPHA_REFQUAD:
+ 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 (h && alpha_elf_dynamic_symbol_p (&h->root, info))
+ 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;
- addend = 0, relocation = 0;
+ dynindx = h->root.dynindx;
+ dynaddend = addend;
+ addend = 0, value = 0;
+ }
+ else if (r_type == R_ALPHA_DTPREL64)
+ {
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
+ value -= dtp_base;
+ goto default_reloc;
+ }
+ else if (r_type == R_ALPHA_TPREL64)
+ {
+ 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)))
{
- outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
- outrel.r_addend = relocation + addend;
+ if (r_type == R_ALPHA_REFLONG)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: unhandled dynamic relocation against %s"),
+ input_bfd,
+ h->root.root.root.string);
+ ret_val = FALSE;
+ }
+ dynindx = 0;
+ dyntype = R_ALPHA_RELATIVE;
+ dynaddend = value;
}
else
goto default_reloc;
- if (!srel)
- {
- const char *name;
+ 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;
- 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);
+ case R_ALPHA_SREL16:
+ case R_ALPHA_SREL32:
+ case R_ALPHA_SREL64:
+ if (dynamic_symbol_p)
+ {
+ _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;
+ }
- srel = bfd_get_section_by_name (dynobj, name);
- BFD_ASSERT(srel != NULL);
- }
- outrel.r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset);
- if (outrel.r_offset != (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);
- }
+ /* ??? .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 == 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;
+
+ case R_ALPHA_TLSLDM:
+ /* Ignore the symbol for the relocation. The result is always
+ the current module. */
+ dynamic_symbol_p = 0;
+ /* FALLTHRU */
+
+ case R_ALPHA_TLSGD:
+ if (!gotent->reloc_done)
+ {
+ gotent->reloc_done = 1;
+
+ /* Note that the module index for the main program is 1. */
+ 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 (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 (elf_hash_table (info)->tls_sec != NULL);
+ value -= dtp_base;
+ }
+ bfd_put_64 (output_bfd, value,
+ sgot->contents + gotent->got_offset + 8);
+ }
+
+ value = (sgot->output_section->vma
+ + sgot->output_offset
+ + gotent->got_offset);
+ value -= gp;
+ goto default_reloc;
+
+ case R_ALPHA_DTPRELHI:
+ case R_ALPHA_DTPRELLO:
+ case R_ALPHA_DTPREL16:
+ if (dynamic_symbol_p)
+ {
+ _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 (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:
+ case R_ALPHA_GOTTPREL:
+ BFD_ASSERT(sgot != NULL);
+ BFD_ASSERT(gp != 0);
+ BFD_ASSERT(gotent != NULL);
+ BFD_ASSERT(gotent->use_count >= 1);
+
+ if (!gotent->reloc_done)
+ {
+ gotent->reloc_done = 1;
+
+ if (dynamic_symbol_p)
+ value = 0;
+ else
+ {
+ 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);
+ }
+
+ value = (sgot->output_section->vma
+ + sgot->output_offset
+ + gotent->got_offset);
+ value -= gp;
goto default_reloc;
default:
default_reloc:
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, relocation,
- addend);
+ contents, rel->r_offset, value, 0);
break;
}
{
const char *name;
+ /* Don't warn if the overflow is due to pc relative reloc
+ against discarded section. Section optimization code should
+ handle it. */
+
+ if (r_symndx < symtab_hdr->sh_info
+ && sec != NULL && howto->pc_relative
+ && 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);
- outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT);
for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
gotent != NULL;
gotent = gotent->next)
{
- asection *sgot = alpha_elf_tdata (gotent->gotobj)->got;
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- outrel.r_addend = gotent->addend;
-
- 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);
+ asection *sgot;
+ long r_type;
+
+ if (gotent->use_count == 0)
+ continue;
+
+ sgot = alpha_elf_tdata (gotent->gotobj)->got;
+
+ r_type = gotent->reloc_type;
+ switch (r_type)
+ {
+ case R_ALPHA_LITERAL:
+ r_type = R_ALPHA_GLOB_DAT;
+ break;
+ case R_ALPHA_TLSGD:
+ r_type = R_ALPHA_DTPMOD64;
+ break;
+ case R_ALPHA_GOTDTPREL:
+ r_type = R_ALPHA_DTPREL64;
+ break;
+ case R_ALPHA_GOTTPREL:
+ r_type = R_ALPHA_TPREL64;
+ break;
+ case R_ALPHA_TLSLDM:
+ default:
+ abort ();
+ }
+
+ 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)
+ 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);
- /* 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_ABO (INSN_LDQ, 28, 28, 8);
+ bfd_put_32 (output_bfd, insn, splt->contents + 24);
- elf_section_data (splt->output_section)->this_hdr.sh_entsize =
- PLT_HEADER_SIZE;
+ insn = INSN_AB (INSN_JMP, 31, 27);
+ bfd_put_32 (output_bfd, insn, splt->contents + 28);
+
+ 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)
{
if (p->type != bfd_indirect_link_order)
{
- if (p->type == bfd_fill_link_order)
+ if (p->type == bfd_data_link_order)
continue;
abort ();
}
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