aboutsummaryrefslogtreecommitdiff
path: root/bfd
diff options
context:
space:
mode:
Diffstat (limited to 'bfd')
-rw-r--r--bfd/ChangeLog9
-rw-r--r--bfd/elf64-alpha.c107
2 files changed, 83 insertions, 33 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index c1f1ab5..2710c8b 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,12 @@
+Sat Apr 25 18:29:07 1998 Richard Henderson <rth@cygnus.com>
+
+ * elf64-alpha.c (struct alpha_relax_info): Add tsec & elfsym members.
+ (elf64_alpha_relax_section): Fill them in.
+ (elf64_alpha_relax_opt_call): Implement more than a stub.
+ (elf64_alpha_add_symbol_hook): Don't set SEC_LOAD or default
+ alignment on .scommon.
+ (elf64_alpha_merge_gots): Merge use counts as well.
+
Sat Apr 25 14:07:29 1998 Richard Henderson <rth@cygnus.com>
* elf64-alpha.c (elf64_alpha_relax_section): Use the proper section
diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c
index 3103081..a4aa3aa 100644
--- a/bfd/elf64-alpha.c
+++ b/bfd/elf64-alpha.c
@@ -1042,6 +1042,8 @@ struct alpha_relax_info
boolean changed_relocs;
bfd_vma gp;
bfd *gotobj;
+ asection *tsec;
+ Elf_Internal_Sym *elfsym;
struct alpha_elf_link_hash_entry *h;
struct alpha_elf_got_entry *gotent;
};
@@ -1209,7 +1211,13 @@ elf64_alpha_relax_with_lituse (info, symval, irel, irelend)
urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
R_ALPHA_BRADDR);
urel->r_addend = irel->r_addend;
- info->changed_relocs = true;
+
+ if (optdest)
+ urel->r_addend += optdest - symval;
+ else
+ all_optimized = false;
+
+ bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
/* Kill any HINT reloc that might exist for this insn. */
xrel = (elf64_alpha_find_reloc_at_ofs
@@ -1218,13 +1226,8 @@ elf64_alpha_relax_with_lituse (info, symval, irel, irelend)
if (xrel)
xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- if (optdest)
- urel->r_addend += optdest - symval;
- else
- all_optimized = false;
-
- bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
info->changed_contents = true;
+ info->changed_relocs = true;
}
else
all_optimized = false;
@@ -1275,16 +1278,60 @@ elf64_alpha_relax_opt_call (info, 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.
+ address load. */
- ??? The .prologue [0,1] information is what we need. How do we
- get it out of the mdebug uglyness? What shall we do when we drop
- that crap for dwarf2?
+ /* 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)
+ return symval;
- For now, only consider the case in which there is an identifyable
- GP load in the first two words. We can then skip over that load. */
+ /* 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)
+ ;
- return 0;
+ /* Otherwise, we may be able to identify a GP load in the first two
+ words, which we can then skip. */
+ else
+ {
+ Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
+ 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;
+
+ /* Recover the symbol's offset within the section. */
+ ofs = (symval - info->tsec->output_section->vma
+ - info->tsec->output_offset);
+
+ /* Look for a GPDISP reloc. */
+ gpdisp = (elf64_alpha_find_reloc_at_ofs
+ (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
+
+ if (!gpdisp || gpdisp->r_addend != 4)
+ {
+ if (tsec_free)
+ free (tsec_free);
+ return 0;
+ }
+ if (tsec_free)
+ free (tsec_free);
+ }
+
+ /* 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;
+
+ return symval + 8;
}
static boolean
@@ -1417,6 +1464,7 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
{
bfd_vma symval;
unsigned int insn;
+ Elf_Internal_Sym isym;
if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL)
continue;
@@ -1461,29 +1509,26 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
/* Get the value of the symbol referred to by the reloc. */
if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
{
- Elf_Internal_Sym isym;
- asection *lsec;
/* A local symbol. */
bfd_elf64_swap_symbol_in (abfd,
extsyms + ELF64_R_SYM (irel->r_info),
&isym);
if (isym.st_shndx == SHN_UNDEF)
- lsec = bfd_und_section_ptr;
+ info.tsec = bfd_und_section_ptr;
else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE)
- lsec = bfd_section_from_elf_index (abfd, isym.st_shndx);
+ info.tsec = bfd_section_from_elf_index (abfd, isym.st_shndx);
else if (isym.st_shndx == SHN_ABS)
- lsec = bfd_abs_section_ptr;
+ info.tsec = bfd_abs_section_ptr;
else if (isym.st_shndx == SHN_COMMON)
- lsec = bfd_com_section_ptr;
+ info.tsec = bfd_com_section_ptr;
else
continue; /* who knows. */
info.h = NULL;
info.gotent = local_got_entries[ELF64_R_SYM(irel->r_info)];
- symval = (isym.st_value
- + lsec->output_section->vma
- + lsec->output_offset);
+ info.elfsym = &isym;
+ symval = isym.st_value;
}
else
{
@@ -1509,10 +1554,11 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
info.h = h;
info.gotent = gotent;
- symval = (h->root.root.u.def.value
- + h->root.root.u.def.section->output_section->vma
- + h->root.root.u.def.section->output_offset);
+ info.tsec = h->root.root.u.def.section;
+ info.elfsym = &((elf_symbol_type *) h)->internal_elf_sym;
+ symval = h->root.root.u.def.value;
}
+ symval += info.tsec->output_section->vma + info.tsec->output_offset;
symval += irel->r_addend;
BFD_ASSERT(info.gotent != NULL);
@@ -1749,18 +1795,12 @@ elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
{
scomm = bfd_make_section (abfd, ".scommon");
if (scomm == NULL
- || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC | SEC_LOAD
+ || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
| SEC_IS_COMMON
| SEC_LINKER_CREATED)))
return false;
}
- if (bfd_get_section_alignment (abfd, scomm) < sym->st_value)
- {
- if (!bfd_set_section_alignment (abfd, scomm, sym->st_value))
- return false;
- }
-
*secp = scomm;
*valp = sym->st_size;
}
@@ -2833,6 +2873,7 @@ elf64_alpha_merge_gots (a, b)
if (ae->gotobj == a && ae->addend == be->addend)
{
ae->flags |= be->flags;
+ ae->use_count += be->use_count;
*pbe = be->next;
goto global_found;
}
generated by cgit v1.1 at 2024-11-13 01:21:20 +0000