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| author | Tony Lindgren <tony@atomide.com> | 2012-09-24 11:42:13 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2012-09-24 11:42:13 -0700 |
| commit | 3fe05bd9980df7207a35b4841a94dc2875e86960 (patch) | |
| tree | b5bb9287088955d2b4b4552b4a4ca9c4c40769a4 /arch/arm/lib/getuser.S | |
| parent | 6bfc82ff589a00e5fbc12b958c649d703d273c86 (diff) | |
| parent | 5698bd757d55b1bb87edd1a9744ab09c142abfc2 (diff) | |
Merge tag 'v3.6-rc6' into devel-dt
Linux 3.6-rc6
Diffstat (limited to 'arch/arm/lib/getuser.S')
| -rw-r--r-- | arch/arm/lib/getuser.S | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S index 11093a7c3e3..9b06bb41fca 100644 --- a/arch/arm/lib/getuser.S +++ b/arch/arm/lib/getuser.S @@ -16,8 +16,9 @@ * __get_user_X * * Inputs: r0 contains the address + * r1 contains the address limit, which must be preserved * Outputs: r0 is the error code - * r2, r3 contains the zero-extended value + * r2 contains the zero-extended value * lr corrupted * * No other registers must be altered. (see <asm/uaccess.h> @@ -27,33 +28,39 @@ * Note also that it is intended that __get_user_bad is not global. */ #include <linux/linkage.h> +#include <asm/assembler.h> #include <asm/errno.h> #include <asm/domain.h> ENTRY(__get_user_1) + check_uaccess r0, 1, r1, r2, __get_user_bad 1: TUSER(ldrb) r2, [r0] mov r0, #0 mov pc, lr ENDPROC(__get_user_1) ENTRY(__get_user_2) -#ifdef CONFIG_THUMB2_KERNEL -2: TUSER(ldrb) r2, [r0] -3: TUSER(ldrb) r3, [r0, #1] + check_uaccess r0, 2, r1, r2, __get_user_bad +#ifdef CONFIG_CPU_USE_DOMAINS +rb .req ip +2: ldrbt r2, [r0], #1 +3: ldrbt rb, [r0], #0 #else -2: TUSER(ldrb) r2, [r0], #1 -3: TUSER(ldrb) r3, [r0] +rb .req r0 +2: ldrb r2, [r0] +3: ldrb rb, [r0, #1] #endif #ifndef __ARMEB__ - orr r2, r2, r3, lsl #8 + orr r2, r2, rb, lsl #8 #else - orr r2, r3, r2, lsl #8 + orr r2, rb, r2, lsl #8 #endif mov r0, #0 mov pc, lr ENDPROC(__get_user_2) ENTRY(__get_user_4) + check_uaccess r0, 4, r1, r2, __get_user_bad 4: TUSER(ldr) r2, [r0] mov r0, #0 mov pc, lr |