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authorKees Cook <keescook@chromium.org>2013-10-15 23:43:14 -0700
committerIngo Molnar <mingo@kernel.org>2013-10-18 08:45:09 +0200
commitaec58bafaf89279522c44ec8ca9211eabb2b6976 (patch)
treea22c5bfa255d386d9ec658c554cd6cd7ac3621b6 /arch/x86/tools
parent6e6a4932b0f569b1a5bb4fcbf5dde1b1a42f01bb (diff)
downloadlinux-aec58bafaf89279522c44ec8ca9211eabb2b6976.tar.bz2
x86/relocs: Add percpu fixup for GNU ld 2.23
The GNU linker tries to put __per_cpu_load into the percpu area, resulting in a lack of its relocation. Force this symbol to be relocated. Seen starting with GNU ld 2.23 and later. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Michael Davidson <md@google.com> Cc: Cong Ding <dinggnu@gmail.com> Link: http://lkml.kernel.org/r/20131016064314.GA2739@www.outflux.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/tools')
-rw-r--r--arch/x86/tools/relocs.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index 71a2533c90d3..11f9285a2ff6 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -729,6 +729,7 @@ static void percpu_init(void)
*
* The GNU linker incorrectly associates:
* __init_begin
+ * __per_cpu_load
*
* The "gold" linker incorrectly associates:
* init_per_cpu__irq_stack_union
@@ -738,6 +739,7 @@ static int is_percpu_sym(ElfW(Sym) *sym, const char *symname)
{
return (sym->st_shndx == per_cpu_shndx) &&
strcmp(symname, "__init_begin") &&
+ strcmp(symname, "__per_cpu_load") &&
strncmp(symname, "init_per_cpu_", 13);
}