Re: [U-Boot] [PATCH] arm: bugfix: save_boot_params_default accesses uninitalized stack when -O0
On Mon, Jun 25, 2012 at 09:42:29PM +0900, Tetsuyuki Kobayashi wrote: save_boot_params_default() in cpu.c accesses uninitialized stack area when it compiled with -O0 (not optimized). Signed-off-by: Tetsuyuki Kobayashi k...@kmckk.co.jp --- arch/arm/cpu/armv7/cpu.c |3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/cpu/armv7/cpu.c b/arch/arm/cpu/armv7/cpu.c index c6fa8ef..6104cb2 100644 --- a/arch/arm/cpu/armv7/cpu.c +++ b/arch/arm/cpu/armv7/cpu.c @@ -37,8 +37,11 @@ #include asm/cache.h #include asm/armv7.h +__attribute__((naked)) /* don't save anything to stack even if compiled with -O0 */ void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3) { + /* stack is not yet initialized */ + asm(bx lr); } Please add linux/compiler.h and use __naked instead. Thanks! -- Tom signature.asc Description: Digital signature ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH] arm: bugfix: save_boot_params_default accesses uninitalized stack when -O0
Hi Tom, thank you for reviewing. (2012/06/28 2:40), Tom Rini wrote: On Mon, Jun 25, 2012 at 09:42:29PM +0900, Tetsuyuki Kobayashi wrote: save_boot_params_default() in cpu.c accesses uninitialized stack area when it compiled with -O0 (not optimized). Signed-off-by: Tetsuyuki Kobayashik...@kmckk.co.jp --- arch/arm/cpu/armv7/cpu.c |3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/cpu/armv7/cpu.c b/arch/arm/cpu/armv7/cpu.c index c6fa8ef..6104cb2 100644 --- a/arch/arm/cpu/armv7/cpu.c +++ b/arch/arm/cpu/armv7/cpu.c @@ -37,8 +37,11 @@ #includeasm/cache.h #includeasm/armv7.h +__attribute__((naked)) /* don't save anything to stack even if compiled with -O0 */ void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3) { + /* stack is not yet initialized */ + asm(bx lr); } Please addlinux/compiler.h and use __naked instead. Thanks! OK. I will post V2 patch. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot