Commit-ID: aec58bafaf89279522c44ec8ca9211eabb2b6976
Gitweb: http://git.kernel.org/tip/aec58bafaf89279522c44ec8ca9211eabb2b6976
Author: Kees Cook <keescook@xxxxxxxxxxxx>
AuthorDate: Tue, 15 Oct 2013 23:43:14 -0700
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 18 Oct 2013 08:45:09 +0200
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@xxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Michael Davidson <md@xxxxxxxxxx>
Cc: Cong Ding <dinggnu@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20131016064314.GA2739@xxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/tools/relocs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index 71a2533..11f9285 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);
}
--
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