From: Brian Gerst brgerst@gmail.com
[ Upstream commit cb7927fda002ca49ae62e2782c1692acc7b80c67 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/tools/relocs.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c index e937be979ec86..92a1e503305ef 100644 --- a/arch/x86/tools/relocs.c +++ b/arch/x86/tools/relocs.c @@ -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.