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arm: bugfix: save_boot_params_default accesses uninitalized stack when -O0

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save_boot_params_default() in cpu.c accesses uninitialized stack area
when it compiled with -O0 (not optimized).

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Acked-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tetsuyuki Kobayashi 2012-06-28 23:36:21 +00:00 • committed by Albert ARIBAUD
parent 816e392148
commit fa042186b9
1 changed files with 7 additions and 1 deletions
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8
arch/arm/cpu/armv7/cpu.c
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@ -36,9 +36,15 @@
#include <asm/system.h> #include <asm/system.h>
#include <asm/cache.h> #include <asm/cache.h>
#include <asm/armv7.h> #include <asm/armv7.h>
#include <linux/compiler.h>
void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3) void __naked save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3)
{ {
/*
* Stack pointer is not yet initialized
* Don't save anything to stack even if compiled with -O0
*/
asm("bx lr");
} }
void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3)