Commit aec58baf authored Oct 15, 2013 by Kees Cook Committed by Ingo Molnar Oct 18, 2013

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>

parent 6e6a4932

arch/x86/tools/relocs.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}