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arm64: Add support for GOT and PCREL32 relocations.

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This commit is contained in:
Vladimir Serbinenko 2017-02-01 21:46:19 +01:00
parent 377c121170
commit 34fe0b5901
9 changed files with 226 additions and 54 deletions
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39
grub-core/kern/arm64/dl_helper.c
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@ -93,3 +93,42 @@ grub_arm64_set_abs_lo12_ldst64 (grub_uint32_t *place, grub_int64_t target)
*place &= insmask;
*place |= grub_cpu_to_le32 (target << 7) & ~insmask;
}
#pragma GCC diagnostic ignored "-Wcast-align"
grub_err_t
grub_arm64_dl_get_tramp_got_size (const void *ehdr, grub_size_t *tramp,
grub_size_t *got)
{
const Elf64_Ehdr *e = ehdr;
const Elf64_Shdr *s;
unsigned i;
*tramp = 0;
*got = 0;
for (i = 0, s = (Elf64_Shdr *) ((char *) e + grub_le_to_cpu64 (e->e_shoff));
i < grub_le_to_cpu16 (e->e_shnum);
i++, s = (Elf64_Shdr *) ((char *) s + grub_le_to_cpu16 (e->e_shentsize)))
if (s->sh_type == grub_cpu_to_le32_compile_time (SHT_REL)
|| s->sh_type == grub_cpu_to_le32_compile_time (SHT_RELA))
{
const Elf64_Rela *rel, *max;
for (rel = (Elf64_Rela *) ((char *) e + grub_le_to_cpu64 (s->sh_offset)),
max = (const Elf64_Rela *) ((grub_addr_t) rel + grub_le_to_cpu64 (s->sh_size));
rel < max; rel = (const Elf64_Rela *) ((grub_addr_t) rel + grub_le_to_cpu64 (s->sh_entsize)))
switch (ELF64_R_TYPE (rel->r_info))
{
case R_AARCH64_CALL26:
case R_AARCH64_JUMP26:
*tramp += sizeof (struct grub_arm64_trampoline);
break;
case R_AARCH64_ADR_GOT_PAGE:
*got += 8;
break;
}
}
return GRUB_ERR_NONE;
}