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Unify GOT/trampoline handling between PPC, MIPS and IA64 as they

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do essentially the same thing, do it in similar way.
This commit is contained in:
Vladimir Serbinenko 2013-11-21 21:54:33 +01:00
parent c6a823e267
commit 4906052019
8 changed files with 99 additions and 80 deletions
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92
grub-core/kern/mips/dl.c
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@ -51,6 +51,58 @@ grub_arch_dl_check_header (void *ehdr)
#pragma GCC diagnostic ignored "-Wcast-align"
grub_err_t
grub_arch_dl_get_tramp_got_size (const void *ehdr, grub_size_t *tramp,
grub_size_t *got)
{
const Elf_Ehdr *e = ehdr;
const Elf_Shdr *s;
unsigned i;
/* FIXME: suboptimal. */
grub_size_t gp_size = 0;
*tramp = 0;
*got = 0;
/* Find a symbol table. */
for (i = 0, s = (const Elf_Shdr *) ((const char *) e + e->e_shoff);
i < e->e_shnum;
i++, s = (const Elf_Shdr *) ((const char *) s + e->e_shentsize))
if (s->sh_type == SHT_SYMTAB)
break;
if (i == e->e_shnum)
return grub_error (GRUB_ERR_BAD_MODULE, N_("no symbol table"));
for (i = 0, s = (const Elf_Shdr *) ((const char *) e + e->e_shoff);
i < e->e_shnum;
i++, s = (const Elf_Shdr *) ((const char *) s + e->e_shentsize))
if (s->sh_type == SHT_REL)
{
const Elf_Rel *rel, *max;
for (rel = (const Elf_Rel *) ((const char *) e + s->sh_offset),
max = rel + s->sh_size / s->sh_entsize;
rel < max;
rel++)
switch (ELF_R_TYPE (rel->r_info))
{
case R_MIPS_GOT16:
case R_MIPS_CALL16:
case R_MIPS_GPREL32:
gp_size += 4;
break;
}
}
if (gp_size > 0x08000)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "__gnu_local_gp is too big\n");
*got = gp_size;
return GRUB_ERR_NONE;
}
/* Relocate symbols. */
grub_err_t
grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
@ -59,7 +111,6 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
Elf_Shdr *s;
Elf_Word entsize;
unsigned i;
grub_size_t gp_size = 0;
/* FIXME: suboptimal. */
grub_uint32_t *gp, *gpptr;
grub_uint32_t gp0;
@ -88,43 +139,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
gp0 = ((grub_uint32_t *)((char *) e + s->sh_offset))[5];
for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
i < e->e_shnum;
i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize))
if (s->sh_type == SHT_REL)
{
grub_dl_segment_t seg;
/* Find the target segment. */
for (seg = mod->segment; seg; seg = seg->next)
if (seg->section == s->sh_info)
break;
if (seg)
{
Elf_Rel *rel, *max;
for (rel = (Elf_Rel *) ((char *) e + s->sh_offset),
max = rel + s->sh_size / s->sh_entsize;
rel < max;
rel++)
switch (ELF_R_TYPE (rel->r_info))
{
case R_MIPS_GOT16:
case R_MIPS_CALL16:
case R_MIPS_GPREL32:
gp_size += 4;
break;
}
}
}
if (gp_size > 0x08000)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "__gnu_local_gp is too big\n");
gpptr = gp = grub_malloc (gp_size);
if (!gp)
return grub_errno;
gpptr = gp = mod->got;
for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
i < e->e_shnum;
@ -234,7 +249,6 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
break;
default:
{
grub_free (gp);
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
N_("relocation 0x%x is not implemented yet"),
ELF_R_TYPE (rel->r_info));