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x86/relocs: Handle R_X86_64_REX_GOTPCRELX relocations

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Clang may produce R_X86_64_REX_GOTPCRELX relocations when redefining the
stack protector location.  Treat them as another type of PC-relative
relocation.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250123190747.745588-6-brgerst@gmail.com
This commit is contained in:
Brian Gerst
2025-01-23 14:07:37 -05:00
committed by Ingo Molnar
parent f58b63857a
commit cb7927fda0
1 changed files with 7 additions and 0 deletions
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7
arch/x86/tools/relocs.c
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@@ -32,6 +32,11 @@ static struct relocs relocs32;
static struct relocs relocs32neg;
static struct relocs relocs64;
# define FMT PRIu64
#ifndef R_X86_64_REX_GOTPCRELX
# define R_X86_64_REX_GOTPCRELX 42
#endif
#else
# define FMT PRIu32
#endif
@@ -227,6 +232,7 @@ static const char *rel_type(unsigned type)
REL_TYPE(R_X86_64_PC16),
REL_TYPE(R_X86_64_8),
REL_TYPE(R_X86_64_PC8),
REL_TYPE(R_X86_64_REX_GOTPCRELX),
#else
REL_TYPE(R_386_NONE),
REL_TYPE(R_386_32),
@@ -861,6 +867,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
case R_X86_64_PC32:
case R_X86_64_PLT32:
case R_X86_64_REX_GOTPCRELX:
/*
* PC relative relocations don't need to be adjusted unless
* referencing a percpu symbol.