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* elf64-alpha.c (alpha_elf_dynamic_symbol_p): Undef weak symbols 

are always dynamic.
        (elf64_alpha_calc_dynrel_sizes): Allow enough room for RELATIVE
        .got relocs in -Bsymbolic shared objects.
This commit is contained in:
Richard Henderson 1998-08-08 22:17:16 +00:00
parent 157a2e242f
commit 382fab1a7a
2 changed files with 230 additions and 189 deletions
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7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
Sat Aug 8 15:15:30 1998 Richard Henderson <rth@cygnus.com>
* elf64-alpha.c (alpha_elf_dynamic_symbol_p): Undef weak symbols
are always dynamic.
(elf64_alpha_calc_dynrel_sizes): Allow enough room for RELATIVE
.got relocs in -Bsymbolic shared objects.
start-sanitize-armelf
Wed Aug 5 15:48:08 1998 Nick Clifton <nickc@cygnus.com>

412
bfd/elf64-alpha.c
View File

@ -229,7 +229,8 @@ struct alpha_elf_link_hash_table
(((info)->shared && !(info)->symbolic && (h)->dynindx != -1) \
|| (((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)))
== (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) \
|| (h)->root.type == bfd_link_hash_undefweak)
/* Create an entry in a Alpha ELF linker hash table. */
@ -1043,9 +1044,9 @@ struct alpha_relax_info
bfd_vma gp;
bfd *gotobj;
asection *tsec;
Elf_Internal_Sym *elfsym;
struct alpha_elf_link_hash_entry *h;
struct alpha_elf_got_entry *gotent;
unsigned char other;
};
static Elf_Internal_Rela * elf64_alpha_relax_with_lituse
@ -1282,12 +1283,12 @@ elf64_alpha_relax_opt_call (info, symval)
/* If the symbol is marked NOPV, we are being told the function never
needs its procedure value. */
if (info->elfsym->st_other == STO_ALPHA_NOPV)
if (info->other == STO_ALPHA_NOPV)
return symval;
/* 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->elfsym->st_other == STO_ALPHA_STD_GPLOAD)
else if (info->other == STO_ALPHA_STD_GPLOAD)
;
/* Otherwise, we may be able to identify a GP load in the first two
@ -1298,14 +1299,23 @@ elf64_alpha_relax_opt_call (info, symval)
bfd_vma ofs;
/* Load the relocations from the section that the target symbol is in. */
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_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
tsec_relend = tsec_relocs + info->tsec->reloc_count;
if (info->sec == info->tsec)
{
tsec_relocs = info->relocs;
tsec_relend = info->relend;
tsec_free = NULL;
}
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);
}
/* Recover the symbol's offset within the section. */
ofs = (symval - info->tsec->output_section->vma
@ -1527,7 +1537,7 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
info.h = NULL;
info.gotent = local_got_entries[ELF64_R_SYM(irel->r_info)];
info.elfsym = &isym;
info.other = isym.st_other;
symval = isym.st_value;
}
else
@ -1555,7 +1565,7 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
info.h = h;
info.gotent = gotent;
info.tsec = h->root.root.u.def.section;
info.elfsym = &((elf_symbol_type *) h)->internal_elf_sym;
info.other = h->root.other;
symval = h->root.root.u.def.value;
}
symval += info.tsec->output_section->vma + info.tsec->output_offset;
@ -1618,6 +1628,8 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
}
}
*again = info.changed_contents || info.changed_relocs;
return true;
error_return:
@ -2279,7 +2291,7 @@ elf64_alpha_output_extsym (h, data)
{
output_section = sec->output_section;
if (output_section != NULL)
h->esym.asym.value = (h->root.plt_offset
h->esym.asym.value = (h->root.plt.offset
+ sec->output_offset
+ output_section->vma);
else
@ -2636,7 +2648,7 @@ elf64_alpha_adjust_dynamic_symbol (info, h)
if (s->_raw_size == 0)
s->_raw_size = PLT_HEADER_SIZE;
h->plt_offset = s->_raw_size;
h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
/* If this symbol is not defined in a regular file, and we are not
@ -2646,7 +2658,7 @@ elf64_alpha_adjust_dynamic_symbol (info, h)
if (!info->shared)
{
h->root.u.def.section = s;
h->root.u.def.value = h->plt_offset;
h->root.u.def.value = h->plt.offset;
}
/* We also need a JMP_SLOT entry in the .rela.plt section. */
@ -2759,6 +2771,7 @@ elf64_alpha_can_merge_gots (a, b)
bfd *a, *b;
{
int total = alpha_elf_tdata (a)->total_got_entries;
bfd *bsub;
/* Trivial quick fallout test. */
if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES)
@ -2771,39 +2784,40 @@ elf64_alpha_can_merge_gots (a, b)
/* 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. */
{
struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
int i, n;
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;
n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
for (i = 0; i < n; ++i)
{
struct alpha_elf_got_entry *ae, *be;
struct alpha_elf_link_hash_entry *h;
n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
for (i = 0; i < n; ++i)
{
struct alpha_elf_got_entry *ae, *be;
struct alpha_elf_link_hash_entry *h;
h = hashes[i];
while (h->root.root.type == bfd_link_hash_indirect
|| h->root.root.type == bfd_link_hash_warning)
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
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;
for (be = h->got_entries; be ; be = be->next)
{
if (be->use_count == 0)
continue;
if (be->gotobj != b)
continue;
for (be = h->got_entries; be ; be = be->next)
{
if (be->use_count == 0)
continue;
if (be->gotobj != b)
continue;
for (ae = h->got_entries; ae ; ae = ae->next)
if (ae->gotobj == a && ae->addend == be->addend)
goto global_found;
for (ae = h->got_entries; ae ; ae = ae->next)
if (ae->gotobj == a && ae->addend == be->addend)
goto global_found;
if (++total > MAX_GOT_ENTRIES)
return false;
global_found:;
}
}
}
if (++total > MAX_GOT_ENTRIES)
return false;
global_found:;
}
}
}
return true;
}
@ -2814,79 +2828,91 @@ static void
elf64_alpha_merge_gots (a, b)
bfd *a, *b;
{
int total = alpha_elf_tdata(a)->total_got_entries;
int total = alpha_elf_tdata (a)->total_got_entries;
bfd *bsub;
/* Remember local expansion. */
{
int e = alpha_elf_tdata(b)->n_local_got_entries;
int e = alpha_elf_tdata (b)->n_local_got_entries;
total += e;
alpha_elf_tdata(a)->n_local_got_entries += e;
alpha_elf_tdata (a)->n_local_got_entries += e;
}
/* Let the local .got entries know they are part of a new subsegment. */
{
struct alpha_elf_got_entry **local_got_entries;
local_got_entries = alpha_elf_tdata(b)->local_got_entries;
if (local_got_entries)
{
int i, n;
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;
n = elf_tdata(b)->symtab_hdr.sh_info;
for (i = 0; i < n; ++i)
{
struct alpha_elf_got_entry *gotent;
for (gotent = local_got_entries[i]; gotent; gotent = gotent->next)
gotent->gotobj = a;
}
}
}
/* 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. */
{
struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
int i, n;
/* Merge the global .got entries. */
hashes = alpha_elf_sym_hashes (bsub);
symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - 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;
n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - 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;
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;
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;
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;
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;
start = &h->got_entries;
for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
{
if (be->use_count == 0)
{
*pbe = be->next;
goto global_found;
}
be->gotobj = a;
total += 1;
continue;
}
if (be->gotobj != b)
continue;
global_found:;
}
}
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;
global_found:;
}
}
alpha_elf_tdata (bsub)->gotobj = a;
}
alpha_elf_tdata (a)->total_got_entries = total;
/* Merge the two in_got chains. */
{
bfd *next;
bsub = a;
while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
bsub = next;
alpha_elf_tdata (bsub)->in_got_link_next = b;
}
alpha_elf_tdata(a)->total_got_entries = total;
alpha_elf_tdata(b)->gotobj = a;
}
/* Calculate the offsets for the got entries. */
@ -2979,69 +3005,73 @@ elf64_alpha_size_got_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
bfd *i, *got_list, *cur_got_obj, **cur_got_tail;
int ngots;
bfd *i, *got_list, *cur_got_obj;
int something_changed = 0;
ngots = 0;
got_list = NULL;
cur_got_obj = NULL;
cur_got_tail = NULL;
for (i = info->input_bfds; i ; i = i->link_next)
got_list = alpha_elf_hash_table (info)->got_list;
/* On the first time through, pretend we have an existing got list
consisting of all of the input files. */
if (got_list == NULL)
{
bfd *this_got = alpha_elf_tdata (i)->gotobj;
/* Don't play if there is no .got for this input file. */
if (this_got == NULL)
continue;
if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
for (i = info->input_bfds; i ; i = i->link_next)
{
/* Yikes! A single object file has too many entries. */
(*_bfd_error_handler)
(_("%s: .got subsegment exceeds 64K (size %d)"),
bfd_get_filename(i),
alpha_elf_tdata(this_got)->total_got_entries * 8);
return false;
bfd *this_got = alpha_elf_tdata (i)->gotobj;
if (this_got == NULL)
continue;
/* We are assuming no merging has yet ocurred. */
BFD_ASSERT (this_got == i);
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_get_filename (i),
alpha_elf_tdata (this_got)->total_got_entries * 8);
return false;
}
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;
}
if (cur_got_obj)
/* Strange degenerate case of no got references. */
if (got_list == NULL)
return true;
alpha_elf_hash_table (info)->got_list = got_list;
/* Force got offsets to be recalculated. */
something_changed = 1;
}
cur_got_obj = got_list;
i = alpha_elf_tdata(cur_got_obj)->got_link_next;
while (i != NULL)
{
if (elf64_alpha_can_merge_gots (cur_got_obj, i))
{
if (this_got == cur_got_obj)
; /* Some previous pass merged us already. */
else if (elf64_alpha_can_merge_gots (cur_got_obj, i))
{
elf64_alpha_merge_gots (cur_got_obj, i);
*cur_got_tail = i;
}
else
{
if (++ngots == 2)
{
(*info->callbacks->warning)
(info, _("using multiple gp values"), (char *) NULL,
output_bfd, (asection *) NULL, (bfd_vma) 0);
}
*cur_got_tail = NULL;
alpha_elf_tdata(cur_got_obj)->got_link_next = got_list;
got_list = cur_got_obj;
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;
}
else
{
++ngots;
cur_got_obj = i;
i = alpha_elf_tdata(i)->got_link_next;
}
cur_got_tail = &alpha_elf_tdata(i)->in_got_link_next;
}
if (cur_got_obj)
alpha_elf_tdata (cur_got_obj)->got_link_next = got_list;
alpha_elf_hash_table (info)->got_list = cur_got_obj;
/* Once the gots have been merged, fill in the got offsets for everything
therein. */
elf64_alpha_calc_got_offsets (info);
/* 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;
}
@ -3108,39 +3138,31 @@ elf64_alpha_calc_dynrel_sizes (h, info)
/* If the symbol is dynamic, we'll need all the relocations in their
natural form. If it has been forced local, we'll need the same
number of RELATIVE relocations. */
if (alpha_elf_dynamic_symbol_p (&h->root, info)
|| (info->shared && h->root.dynindx == -1))
number of RELATIVE relocations.
Except, don't add a .got reloc if we're not using a .plt entry. */
if ((alpha_elf_dynamic_symbol_p (&h->root, info)
|| info->shared)
&& h->root.plt.offset == MINUS_ONE)
{
struct alpha_elf_reloc_entry *relent;
bfd *dynobj = elf_hash_table(info)->dynobj;
struct alpha_elf_got_entry *gotent;
bfd_size_type count = 0;
asection *srel;
for (relent = h->reloc_entries; relent; relent = relent->next)
for (gotent = h->got_entries; gotent ; gotent = gotent->next)
count++;
if (count > 0)
{
relent->srel->_raw_size +=
sizeof (Elf64_External_Rela) * relent->count;
}
/* Only add a .rela.got entry if we're not using a .plt entry. */
if (h->root.plt_offset == MINUS_ONE)
{
bfd *dynobj = elf_hash_table(info)->dynobj;
struct alpha_elf_got_entry *gotent;
bfd_size_type count = 0;
asection *srel;
for (gotent = h->got_entries; gotent ; gotent = gotent->next)
count++;
if (count > 0)
{
srel = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (srel != NULL);
srel->_raw_size += sizeof (Elf64_External_Rela) * count;
}
srel = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (srel != NULL);
srel->_raw_size += sizeof (Elf64_External_Rela) * count;
}
}
/* Otherwise, shared objects require RELATIVE relocs for all REFQUAD
/* Shared objects require at least RELATIVE relocs for all REFQUAD
and REFLONG relocations. */
else if (info->shared)
if (info->shared)
{
struct alpha_elf_reloc_entry *relent;
@ -3581,7 +3603,8 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
/* If the symbol has been forced local, output a
RELATIVE reloc, otherwise it will be handled in
finish_dynamic_symbol. */
if (info->shared && h->root.dynindx == -1)
if (info->shared
&& !alpha_elf_dynamic_symbol_p (&h->root, info))
{
Elf_Internal_Rela outrel;
@ -3794,7 +3817,7 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
{
bfd *dynobj = elf_hash_table(info)->dynobj;
if (h->plt_offset != MINUS_ONE)
if (h->plt.offset != MINUS_ONE)
{
/* Fill in the .plt entry for this symbol. */
asection *splt, *sgot, *srel;
@ -3822,21 +3845,21 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
+ gotent->got_offset);
plt_addr = (splt->output_section->vma
+ splt->output_offset
+ h->plt_offset);
+ h->plt.offset);
plt_index = (h->plt_offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
/* Fill in the entry in the procedure linkage table. */
{
unsigned insn1, insn2, insn3;
insn1 = PLT_ENTRY_WORD1 | ((-(h->plt_offset + 4) >> 2) & 0x1fffff);
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);
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);
}
/* Fill in the entry in the .rela.plt section. */
@ -4053,6 +4076,15 @@ elf64_alpha_final_link (abfd, info)
HDRR *symhdr = &debug.symbolic_header;
PTR mdebug_handle = NULL;
#if 0
if (++ngots == 2)
{
(*info->callbacks->warning)
(info, _("using multiple gp values"), (char *) NULL,
output_bfd, (asection *) NULL, (bfd_vma) 0);
}
#endif
/* Go through the sections and collect the .reginfo and .mdebug
information. */
reginfo_sec = NULL;
@ -4764,5 +4796,7 @@ elf64_alpha_ecoff_debug_swap =
#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
#include "elf64-target.h"