diff options
| author | Colin Cross <ccross@android.com> | 2011-01-27 15:46:20 -0800 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:38:28 -0800 |
| commit | 411eb5d9d6af3861acfe7ecf239271eef7956700 (patch) | |
| tree | a4af5404671b18ab5fc8cbb7dcc48167f003307f | |
| parent | ae5665eb25692e684769126af44b3d2c8c04cba3 (diff) | |
ARM: vfp: Move exception address fixup into vfphw.S
If the PC on the stack is updated in entry-armv.S,
do_undefinstr can get called after the fixup. do_undefinstr
does its own fixup, and doing both causes the PC to point to
half way through an instruction.
Instead, do the fixup in do_vfp, where only the vfp code
can get called.
Change-Id: I6d966887adc8ed58d88bfe0cb3c0ba29213be488
Signed-off-by: Colin Cross <ccross@android.com>
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 3 | ||||
| -rw-r--r-- | arch/arm/vfp/entry.S | 3 |
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index ce4ec94e5cd0..4f8e30f183b9 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -450,8 +450,7 @@ __und_usr: blo __und_usr_unknown 3: ldrht r0, [r4] add r2, r2, #2 @ r2 is PC + 2, make it PC + 4 - str r2, [sp, #S_PC] @ it's a 2x16bit instr, update - orr r0, r0, r5, lsl #16 @ regs->ARM_pc + orr r0, r0, r5, lsl #16 #else b __und_usr_unknown #endif diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S index 4fa9903b83cf..c1a978402583 100644 --- a/arch/arm/vfp/entry.S +++ b/arch/arm/vfp/entry.S @@ -10,7 +10,7 @@ * * Basic entry code, called from the kernel's undefined instruction trap. * r0 = faulted instruction - * r5 = faulted PC+4 + * r2 = faulted PC+4 * r9 = successful return * r10 = thread_info structure * lr = failure return @@ -26,6 +26,7 @@ ENTRY(do_vfp) str r11, [r10, #TI_PREEMPT] #endif enable_irq + str r2, [sp, #S_PC] @ update regs->ARM_pc for Thumb 2 case ldr r4, .LCvfp ldr r11, [r10, #TI_CPU] @ CPU number add r10, r10, #TI_VFPSTATE @ r10 = workspace |