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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-12-13 09:12:51 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-12-13 09:12:51 +0000 |
| commit | 72aaf09fda49f5919d98d65d35e5179f3acb0497 (patch) | |
| tree | 5fd25748f7f5640f8ee8efb86ddca88d12840791 /arch/powerpc/kernel/entry_64.S | |
| parent | 67fbc2312312095acc2f19a0b601bac10f84cf9d (diff) | |
| parent | 58c2467355ed3154a12ee49d8f8236547145c9d3 (diff) | |
Merge git://git.marvell.com/orion into devel
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index e6d52845854..e0bcf935428 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -57,12 +57,18 @@ system_call_common: beq- 1f ld r1,PACAKSAVE(r13) 1: std r10,0(r1) - crclr so std r11,_NIP(r1) std r12,_MSR(r1) std r0,GPR0(r1) std r10,GPR1(r1) ACCOUNT_CPU_USER_ENTRY(r10, r11) + /* + * This "crclr so" clears CR0.SO, which is the error indication on + * return from this system call. There must be no cmp instruction + * between it and the "mfcr r9" below, otherwise if XER.SO is set, + * CR0.SO will get set, causing all system calls to appear to fail. + */ + crclr so std r2,GPR2(r1) std r3,GPR3(r1) std r4,GPR4(r1) |