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x86: Treat R_X86_64_PLT32 as R_X86_64_PC32 #518

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x86: Treat R_X86_64_PLT32 as R_X86_64_PC32 #518

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1 change: 1 addition & 0 deletions arch/x86/kernel/machine_kexec_64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -542,6 +542,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
goto overflow;
break;
case R_X86_64_PC32:
case R_X86_64_PLT32:
value -= (u64)address;
*(u32 *)location = value;
break;
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1 change: 1 addition & 0 deletions arch/x86/kernel/module.c
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Expand Up @@ -191,6 +191,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
goto overflow;
break;
case R_X86_64_PC32:
case R_X86_64_PLT32:
if (*(u32 *)loc != 0)
goto invalid_relocation;
val -= (u64)loc;
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3 changes: 3 additions & 0 deletions arch/x86/tools/relocs.c
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Expand Up @@ -770,9 +770,12 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
break;

case R_X86_64_PC32:
case R_X86_64_PLT32:
/*
* PC relative relocations don't need to be adjusted unless
* referencing a percpu symbol.
*
* NB: R_X86_64_PLT32 can be treated as R_X86_64_PC32.
*/
if (is_percpu_sym(sym, symname))
add_reloc(&relocs32neg, offset);
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