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ARM: entry: prefetch/data abort helpers: avoid corrupting r4 

Replace r4 with ip for calling abort helpers - ip is allowed to be
corrupted by called functions in the ABI, so it makes more sense to
use such a register.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-06-25 15:46:08 +01:00
parent ac8b9c1ce0
commit 0402becef9
1 changed files with 4 additions and 4 deletions
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8
arch/arm/kernel/entry-armv.S
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@ -47,9 +47,9 @@
.macro pabt_helper
mov r0, r2 @ pass address of aborted instruction.
#ifdef MULTI_PABORT
ldr r4, .LCprocfns
ldr ip, .LCprocfns
mov lr, pc
ldr pc, [r4, #PROCESSOR_PABT_FUNC]
ldr pc, [ip, #PROCESSOR_PABT_FUNC]
#else
bl CPU_PABORT_HANDLER
#endif
@ -67,9 +67,9 @@
@ the fault status register in r1. r9 must be preserved.
@
#ifdef MULTI_DABORT
ldr r4, .LCprocfns
ldr ip, .LCprocfns
mov lr, pc
ldr pc, [r4, #PROCESSOR_DABT_FUNC]
ldr pc, [ip, #PROCESSOR_DABT_FUNC]
#else
bl CPU_DABORT_HANDLER
#endif