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Restructure module loading and many fixes. Now normal.mod loads successfully

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This commit is contained in:
phcoder 2011-01-02 23:30:25 +01:00
parent bbbf84350e
commit f49157dfe5
4 changed files with 99 additions and 126 deletions
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83
grub-core/kern/dl.c
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@ -229,6 +229,46 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
{
unsigned i;
Elf_Shdr *s;
grub_size_t tsize = 0, talign = 1;
#ifdef __ia64__
grub_size_t tramp;
grub_size_t got;
#endif
char *ptr;
for (i = 0, s = (Elf_Shdr *)((char *) e + e->e_shoff);
i < e->e_shnum;
i++, s = (Elf_Shdr *)((char *) s + e->e_shentsize))
{
tsize += ALIGN_UP (s->sh_size, s->sh_addralign);
if (talign < s->sh_addralign)
talign = s->sh_addralign;
}
#ifdef __ia64__
grub_arch_dl_get_tramp_got_size (e, &tramp, &got);
tsize += ALIGN_UP (tramp, GRUB_ARCH_DL_TRAMP_ALIGN);
if (talign < GRUB_ARCH_DL_TRAMP_ALIGN)
talign = GRUB_ARCH_DL_TRAMP_ALIGN;
tsize += ALIGN_UP (got, GRUB_ARCH_DL_GOT_ALIGN);
if (talign < GRUB_ARCH_DL_GOT_ALIGN)
talign = GRUB_ARCH_DL_GOT_ALIGN;
#endif
#ifdef GRUB_MACHINE_EMU
if (talign < 8192 * 16)
talign = 8192 * 16;
tsize = ALIGN_UP (tsize, 8192 * 16);
#endif
mod->base = grub_memalign (talign, tsize);
if (!mod->base)
return grub_errno;
ptr = mod->base;
#ifdef GRUB_MACHINE_EMU
mprotect (mod->base, tsize, PROT_READ | PROT_WRITE | PROT_EXEC);
#endif
for (i = 0, s = (Elf_Shdr *)((char *) e + e->e_shoff);
i < e->e_shnum;
@ -237,38 +277,18 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
if (s->sh_flags & SHF_ALLOC)
{
grub_dl_segment_t seg;
grub_size_t tramp_size = 0;
grub_size_t alsize, align;
seg = (grub_dl_segment_t) grub_malloc (sizeof (*seg));
if (! seg)
return grub_errno;
alsize = s->sh_size;
align = s->sh_addralign;
tramp_size = grub_arch_dl_get_tramp_size (e, i);
if (tramp_size && align < GRUB_ARCH_DL_TRAMP_ALIGN)
{
align = GRUB_ARCH_DL_TRAMP_ALIGN;
alsize = ALIGN_UP (alsize, GRUB_ARCH_DL_TRAMP_ALIGN);
}
alsize += tramp_size;
#ifdef GRUB_MACHINE_EMU
if (align < 8192 * 16)
align = 8192 * 16;
alsize = ALIGN_UP (alsize, 8192 * 16);
#endif
if (alsize)
if (s->sh_size)
{
void *addr;
addr = grub_memalign (align, alsize);
if (! addr)
{
grub_free (seg);
return grub_errno;
}
ptr = (char *) ALIGN_UP ((grub_addr_t) ptr, s->sh_addralign);
addr = ptr;
ptr += s->sh_size;
switch (s->sh_type)
{
@ -281,10 +301,6 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
}
seg->addr = addr;
#ifdef GRUB_MACHINE_EMU
if (s->sh_flags & SHF_EXECINSTR)
mprotect (addr, alsize, PROT_READ | PROT_WRITE | PROT_EXEC);
#endif
}
else
seg->addr = 0;
@ -295,6 +311,14 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
mod->segment = seg;
}
}
#ifdef __ia64__
ptr = (char *) ALIGN_UP ((grub_addr_t) ptr, GRUB_ARCH_DL_TRAMP_ALIGN);
mod->tramp = ptr;
ptr += tramp;
ptr = (char *) ALIGN_UP ((grub_addr_t) ptr, GRUB_ARCH_DL_GOT_ALIGN);
mod->got = ptr;
ptr += got;
#endif
return GRUB_ERR_NONE;
}
@ -371,7 +395,7 @@ grub_dl_resolve_symbols (grub_dl_t mod, Elf_Ehdr *e)
if (!desc)
return grub_errno;
desc[0] = (void *) sym->st_value;
desc[1] = mod->gp;
desc[1] = mod->base;
if (grub_dl_register_symbol (name, (void *) desc, mod))
return grub_errno;
sym->st_value = (grub_addr_t) desc;
@ -564,7 +588,6 @@ grub_dl_load_core (void *addr, grub_size_t size)
if (grub_dl_resolve_name (mod, e)
|| grub_dl_resolve_dependencies (mod, e)
|| grub_dl_load_segments (mod, e)
|| grub_arch_dl_allocate_gp (mod, e)
|| grub_dl_resolve_symbols (mod, e)
|| grub_arch_dl_relocate_symbols (mod, e))
{