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objtool: Handle different entry size of rodata

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In the most cases, the entry size of rodata is 8 bytes because the
relocation type is 64 bit. There are also 32 bit relocation types,
the entry size of rodata should be 4 bytes in this case.

Add an arch-specific function arch_reloc_size() to assign the entry
size of rodata for x86, powerpc and LoongArch.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/20250211115016.26913-3-yangtiezhu@loongson.cn
Acked-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Tiezhu Yang 2025-02-11 19:50:11 +08:00 committed by Josh Poimboeuf
parent ab6ce22b78
commit 091bf313f8
5 changed files with 41 additions and 1 deletions
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11
tools/objtool/arch/loongarch/decode.c
View File

@ -363,3 +363,14 @@ void arch_initial_func_cfi_state(struct cfi_init_state *state)
state->cfa.base = CFI_SP;
state->cfa.offset = 0;
}
unsigned int arch_reloc_size(struct reloc *reloc)
{
switch (reloc_type(reloc)) {
case R_LARCH_32:
case R_LARCH_32_PCREL:
return 4;
default:
return 8;
}
}

14
tools/objtool/arch/powerpc/decode.c
View File

@ -106,3 +106,17 @@ void arch_initial_func_cfi_state(struct cfi_init_state *state)
state->regs[CFI_RA].base = CFI_CFA;
state->regs[CFI_RA].offset = 0;
}
unsigned int arch_reloc_size(struct reloc *reloc)
{
switch (reloc_type(reloc)) {
case R_PPC_REL32:
case R_PPC_ADDR32:
case R_PPC_UADDR32:
case R_PPC_PLT32:
case R_PPC_PLTREL32:
return 4;
default:
return 8;
}
}

13
tools/objtool/arch/x86/decode.c
View File

@ -852,3 +852,16 @@ bool arch_is_embedded_insn(struct symbol *sym)
return !strcmp(sym->name, "retbleed_return_thunk") ||
!strcmp(sym->name, "srso_safe_ret");
}
unsigned int arch_reloc_size(struct reloc *reloc)
{
switch (reloc_type(reloc)) {
case R_X86_64_32:
case R_X86_64_32S:
case R_X86_64_PC32:
case R_X86_64_PLT32:
return 4;
default:
return 8;
}
}

2
tools/objtool/check.c
View File

@ -1969,7 +1969,7 @@ static int add_jump_table(struct objtool_file *file, struct instruction *insn,
break;
/* Make sure the table entries are consecutive: */
if (prev_offset && reloc_offset(reloc) != prev_offset + 8)
if (prev_offset && reloc_offset(reloc) != prev_offset + arch_reloc_size(reloc))
break;
sym_offset = reloc->sym->offset + reloc_addend(reloc);

2
tools/objtool/include/objtool/arch.h
View File

@ -97,4 +97,6 @@ int arch_rewrite_retpolines(struct objtool_file *file);
bool arch_pc_relative_reloc(struct reloc *reloc);
unsigned int arch_reloc_size(struct reloc *reloc);
#endif /* _ARCH_H */