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loongarch: Add support for ELF psABI v2.00 relocations

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A new set of relocation types was added in the LoongArch ELF psABI v2.00
spec [1], [2] to replace the stack-based scheme in v1.00. Toolchain
support is available from binutils 2.40 and gcc 13 onwards.

This patch adds support for the new relocation types, that are simpler
to handle (in particular, stack operations are gone). Support for the
v1.00 relocs are kept for now, for compatibility with older toolchains.

[1] https://github.com/loongson/LoongArch-Documentation/pull/57
[2] https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_appendix_revision_history

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
This commit is contained in:
Wentao Guan 2024-08-25 16:05:11 +08:00
parent a12fcf90ed
commit 30b840dae2
7 changed files with 193 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
GRUB2/MOD_SRC/grub-2.04/configure.ac
View File

@ -833,6 +833,21 @@ if ( test "x$target_cpu" = xi386 || test "x$target_cpu" = xx86_64 ) && test "x$p
TARGET_CFLAGS="$TARGET_CFLAGS -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow"
fi
if test "x$target_cpu" = xloongarch64; then
AC_CACHE_CHECK([whether _mno_explicit_relocs works], [grub_cv_cc_mno_explicit_relocs], [
CFLAGS="$TARGET_CFLAGS -mno-explicit-relocs -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_mno_explicit_relocs=yes],
[grub_cv_cc_mno_explicit_relocs=no])
])
if test "x$grub_cv_cc_mno_explicit_relocs" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mno-explicit-relocs -fno-plt"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -mno-explicit-relocs -fno-plt"
fi
TARGET_CFLAGS="$TARGET_CFLAGS -Wa,-mla-global-with-abs"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -Wa,-mla-global-with-abs"
fi
# GRUB doesn't use float or doubles at all. Yet some toolchains may decide
# that floats are a good fit to run instead of what's written in the code.
# Given that floating point unit is disabled (if present to begin with)

54
GRUB2/MOD_SRC/grub-2.04/grub-core/kern/loongarch64/dl.c
View File

@ -58,7 +58,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
rel = (Elf_Rel *) ((char *) rel + s->sh_entsize))
{
Elf_Sym *sym;
grub_uint64_t *place;
void *place;
grub_uint64_t sym_addr;
if (rel->r_offset >= seg->size)
@ -72,12 +72,19 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
if (s->sh_type == SHT_RELA)
sym_addr += ((Elf_Rela *) rel)->r_addend;
place = (grub_uint64_t *) ((grub_addr_t) seg->addr + rel->r_offset);
place = (void *) ((grub_addr_t) seg->addr + rel->r_offset);
switch (ELF_R_TYPE (rel->r_info))
{
case R_LARCH_64:
*place = sym_addr;
{
grub_uint64_t *abs_place = place;
grub_dprintf ("dl", "reloc_abs64 %p => 0x%016llx, %p\n",
place, (unsigned long long) sym_addr, abs_place);
*abs_place += (grub_uint64_t) sym_addr;
}
break;
case R_LARCH_MARK_LA:
break;
@ -85,6 +92,47 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
case R_LARCH_SOP_PUSH_PLT_PCREL:
grub_loongarch64_sop_push (&stack, sym_addr - (grub_uint64_t)place);
break;
case R_LARCH_B26:
{
grub_uint32_t *abs_place = place;
grub_ssize_t off = sym_addr - (grub_addr_t) place;
grub_loongarch64_b26 (abs_place, off);
}
break;
case R_LARCH_ABS_HI20:
{
grub_uint32_t *abs_place = place;
grub_loongarch64_xxx_hi20 (abs_place, sym_addr);
}
break;
case R_LARCH_ABS64_LO20:
{
grub_uint32_t *abs_place = place;
grub_loongarch64_xxx64_lo20 (abs_place, sym_addr);
}
break;
case R_LARCH_ABS64_HI12:
{
grub_uint32_t *abs_place = place;
grub_loongarch64_xxx64_hi12 (abs_place, sym_addr);
}
break;
case R_LARCH_PCALA_HI20:
{
grub_uint32_t *abs_place = place;
grub_int32_t off = (((sym_addr + 0x800) & ~0xfffULL) - ((grub_addr_t)place & ~0xfffULL));
grub_loongarch64_xxx_hi20 (abs_place, off);
}
break;
case R_LARCH_ABS_LO12:
case R_LARCH_PCALA_LO12:
{
grub_uint32_t *abs_place = place;
grub_loongarch64_xxx_lo12 (abs_place, sym_addr);
}
break;
GRUB_LOONGARCH64_RELOCATION (&stack, place, sym_addr)
default:
{

59
GRUB2/MOD_SRC/grub-2.04/grub-core/kern/loongarch64/dl_helper.c
View File

@ -199,3 +199,62 @@ grub_loongarch64_sop_32_s_0_10_10_16_s2 (grub_loongarch64_stack_t stack,
*place =(*place) | (((a >> 2) & 0xffff) << 10);
*place =(*place) | ((a >> 18) & 0x3ff);
}
void grub_loongarch64_b26 (grub_uint32_t *place, grub_int64_t offset)
{
grub_uint32_t val;
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);
val = ((offset >> 18) & 0x3ff) | (((offset >> 2) & 0xffff) << 10);
*place &= insmask;
*place |= grub_cpu_to_le32 (val) & ~insmask;
}
void grub_loongarch64_xxx_hi20 (grub_uint32_t *place, grub_int64_t offset)
{
const grub_uint32_t insmask = grub_cpu_to_le32_compile_time (0xfe00001f);
grub_uint32_t val;
offset >>= 12;
val = ((offset & 0xfffff) << 5);
*place &= insmask;
*place |= grub_cpu_to_le32 (val) & ~insmask;
}
void grub_loongarch64_xxx_lo12 (grub_uint32_t *place, grub_int64_t offset)
{
const grub_uint32_t insmask = grub_cpu_to_le32_compile_time (0xffc003ff);
*place &= insmask;
*place |= grub_cpu_to_le32 (offset << 10) & ~insmask;
}
void grub_loongarch64_xxx64_hi12 (grub_uint32_t *place, grub_int64_t offset)
{
const grub_uint32_t insmask = grub_cpu_to_le32_compile_time (0xffc003ff);
grub_uint32_t val;
offset >>= 52;
val = ((offset & 0xfff) << 10);
*place &= insmask;
*place |= grub_cpu_to_le32 (val) & ~insmask;
}
void grub_loongarch64_xxx64_lo20 (grub_uint32_t *place, grub_int64_t offset)
{
const grub_uint32_t insmask = grub_cpu_to_le32_compile_time (0xfe00001f);
grub_uint32_t val;
offset >>= 32;
val = ((offset & 0xfffff) << 5);
*place &= insmask;
*place |= grub_cpu_to_le32 (val) & ~insmask;
}

7
GRUB2/MOD_SRC/grub-2.04/include/grub/elf.h
View File

@ -2553,6 +2553,13 @@ typedef Elf32_Addr Elf32_Conflict;
#define R_LARCH_SOP_POP_32_S_5_20 43
#define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
#define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
#define R_LARCH_B26 66
#define R_LARCH_ABS_HI20 67
#define R_LARCH_ABS_LO12 68
#define R_LARCH_ABS64_LO20 69
#define R_LARCH_ABS64_HI12 70
#define R_LARCH_PCALA_HI20 71
#define R_LARCH_PCALA_LO12 72
#ifdef GRUB_TARGET_WORDSIZE
#if GRUB_TARGET_WORDSIZE == 32

6
GRUB2/MOD_SRC/grub-2.04/include/grub/loongarch64/reloc.h
View File

@ -57,6 +57,12 @@ void grub_loongarch64_sop_32_s_0_5_10_16_s2 (grub_loongarch64_stack_t stack,
void grub_loongarch64_sop_32_s_0_10_10_16_s2 (grub_loongarch64_stack_t stack,
grub_uint64_t *place);
void grub_loongarch64_b26 (grub_uint32_t *place, grub_int64_t offset);
void grub_loongarch64_xxx_hi20 (grub_uint32_t *place, grub_int64_t offset);
void grub_loongarch64_xxx_lo12 (grub_uint32_t *place, grub_int64_t offset);
void grub_loongarch64_xxx64_hi12 (grub_uint32_t *place, grub_int64_t offset);
void grub_loongarch64_xxx64_lo20 (grub_uint32_t *place, grub_int64_t offset);
#define GRUB_LOONGARCH64_RELOCATION(STACK, PLACE, OFFSET) \
case R_LARCH_SOP_PUSH_ABSOLUTE: \
grub_loongarch64_sop_push (STACK, OFFSET); \

49
GRUB2/MOD_SRC/grub-2.04/util/grub-mkimagexx.c
View File

@ -1192,11 +1192,20 @@ SUFFIX (relocate_addrs) (Elf_Ehdr *e, struct section_metadata *smd,
}
case EM_LOONGARCH:
{
grub_int64_t pc;
grub_uint32_t *t32 = (grub_uint32_t *) target;
sym_addr += addend;
pc = offset + target_section_addr + image_target->vaddr_offset;
switch (ELF_R_TYPE (info))
{
case R_LARCH_64:
*target = grub_host_to_target64 (grub_target_to_host64 (*target) + sym_addr);
{
grub_uint64_t *t64 = (grub_uint64_t *) target;
*t64 = grub_host_to_target64 (grub_target_to_host64 (*t64) + sym_addr);
}
break;
case R_LARCH_MARK_LA:
break;
@ -1207,6 +1216,37 @@ SUFFIX (relocate_addrs) (Elf_Ehdr *e, struct section_metadata *smd,
+offset
+image_target->vaddr_offset));
break;
case R_LARCH_B26:
{
grub_int64_t off;
off = sym_addr - target_section_addr - offset - image_target->vaddr_offset;
grub_loongarch64_b26 (t32, off);
}
break;
case R_LARCH_ABS_HI20:
grub_loongarch64_xxx_hi20 (t32, sym_addr);
break;
case R_LARCH_ABS64_LO20:
grub_loongarch64_xxx64_lo20 (t32, sym_addr);
break;
case R_LARCH_ABS64_HI12:
grub_loongarch64_xxx64_hi12 (t32, sym_addr);
break;
case R_LARCH_PCALA_HI20:
{
grub_int32_t hi20;
hi20 = (((sym_addr + 0x800) & ~0xfffULL) - (pc & ~0xfffULL));
grub_loongarch64_xxx_hi20 (t32, hi20);
}
break;
case R_LARCH_ABS_LO12:
case R_LARCH_PCALA_LO12:
grub_loongarch64_xxx_lo12 (t32, sym_addr);
break;
GRUB_LOONGARCH64_RELOCATION (&stack, target, sym_addr)
default:
grub_util_error (_("relocation 0x%x is not implemented yet"),
@ -1801,6 +1841,13 @@ translate_relocation_pe (struct translate_context *ctx,
case R_LARCH_SOP_POP_32_S_5_20:
case R_LARCH_SOP_POP_32_S_0_5_10_16_S2:
case R_LARCH_SOP_POP_32_S_0_10_10_16_S2:
case R_LARCH_B26:
case R_LARCH_ABS_HI20:
case R_LARCH_ABS_LO12:
case R_LARCH_ABS64_LO20:
case R_LARCH_ABS64_HI12:
case R_LARCH_PCALA_HI20:
case R_LARCH_PCALA_LO12:
grub_util_info (" %s: not adding fixup: 0x%08x : 0x%08x",
__FUNCTION__,
(unsigned int) addr,

7
GRUB2/MOD_SRC/grub-2.04/util/grub-module-verifier.c
View File

@ -140,6 +140,13 @@ struct grub_module_verifier_arch archs[] = {
R_LARCH_SOP_POP_32_S_5_20,
R_LARCH_SOP_POP_32_S_0_5_10_16_S2,
R_LARCH_SOP_POP_32_S_0_10_10_16_S2,
R_LARCH_B26,
R_LARCH_ABS_HI20,
R_LARCH_ABS_LO12,
R_LARCH_ABS64_LO20,
R_LARCH_ABS64_HI12,
R_LARCH_PCALA_HI20,
R_LARCH_PCALA_LO12,
-1
}, (int[]){
-1