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Revamp relocation handling.

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Move more code to common dl.c. Add missing veneers for arm and arm64.
	Decreases kernel size by 70 bytes on i386-pc (40-50 compressed)
This commit is contained in:
Vladimir Serbinenko 2013-12-06 09:18:55 +01:00
parent a846dd4b3a
commit 8c534b85f1
18 changed files with 1097 additions and 987 deletions
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39
grub-core/kern/arm64/dl_helper.c
View file

@ -25,46 +25,31 @@
#include <grub/i18n.h>
#include <grub/arm64/reloc.h>
static grub_ssize_t
sign_compress_offset (grub_ssize_t offset, int bitpos)
{
return offset & ((1LL << (bitpos + 1)) - 1);
}
/*
* grub_arm64_reloc_xxxx26():
*
* JUMP26/CALL26 relocations for B and BL instructions.
*/
grub_err_t
grub_arm64_reloc_xxxx26 (grub_uint32_t *place, Elf64_Addr adjust)
int
grub_arm_64_check_xxxx26_offset (grub_int64_t offset)
{
grub_uint32_t insword, insmask;
grub_ssize_t offset;
const grub_ssize_t offset_low = -(1 << 27), offset_high = (1 << 27) - 1;
insword = grub_le_to_cpu32 (*place);
insmask = 0xfc000000;
offset = adjust;
#ifndef GRUB_UTIL
offset -= (grub_addr_t) place;
#endif
if ((offset < offset_low) || (offset > offset_high))
{
return grub_error (GRUB_ERR_BAD_MODULE,
N_("CALL26 Relocation out of range"));
}
return 0;
return 1;
}
void
grub_arm64_set_xxxx26_offset (grub_uint32_t *place, grub_int64_t offset)
{
const grub_uint32_t insmask = grub_cpu_to_le32_compile_time (0xfc000000);
grub_dprintf ("dl", " reloc_xxxx64 %p %c= 0x%llx\n",
place, offset > 0 ? '+' : '-',
offset < 0 ? (long long) -(unsigned long long) offset : offset);
offset = sign_compress_offset (offset, 27) >> 2;
*place = grub_cpu_to_le32 ((insword & insmask) | offset);
return GRUB_ERR_NONE;
*place &= insmask;
*place |= grub_cpu_to_le32 (offset >> 2) & ~insmask;
}