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-rw-r--r--arch/arm/kernel/entry-header.S8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 1420725142ca..5d702f8900b1 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -37,9 +37,9 @@
#endif
.endm
- .macro alignment_trap, rtemp
+ .macro alignment_trap, rtemp, label
#ifdef CONFIG_ALIGNMENT_TRAP
- ldr \rtemp, .LCcralign
+ ldr \rtemp, \label
ldr \rtemp, [\rtemp]
mcr p15, 0, \rtemp, c1, c0
#endif
@@ -132,6 +132,10 @@
orrne r5, V7M_xPSR_FRAMEPTRALIGN
biceq r5, V7M_xPSR_FRAMEPTRALIGN
+ @ ensure bit 0 is cleared in the PC, otherwise behaviour is
+ @ unpredictable
+ bic r4, #1
+
@ write basic exception frame
stmdb r2!, {r1, r3-r5}
ldmia sp, {r1, r3-r5}