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| author | Olof Johansson <olof@lixom.net> | 2007-04-24 01:11:55 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-04-24 22:06:59 +1000 |
| commit | 687304014f7ca8e2fbb3feaefef356b4a0da65ad (patch) | |
| tree | 2212a33688e74d8c8bef0affe67cabbf5a14e03c /arch | |
| parent | 6cfef5b27e49e826125f12637ee0d7210a896044 (diff) | |
| download | linux-687304014f7ca8e2fbb3feaefef356b4a0da65ad.tar.gz linux-687304014f7ca8e2fbb3feaefef356b4a0da65ad.tar.bz2 linux-687304014f7ca8e2fbb3feaefef356b4a0da65ad.zip | |
[POWERPC] Save trap number in bad_stack
Save the trap number in the case of getting a bad stack in an exception
handler. It is sometimes useful to know what exception it was that caused
this to happen. Without this, no trap number is reported.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 10 |
2 files changed, 9 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 9735e828b52d..0c5150c69175 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -139,6 +139,7 @@ int main(void) DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time)); DEFINE(PACA_SLBSHADOWPTR, offsetof(struct paca_struct, slb_shadow_ptr)); DEFINE(PACA_DATA_OFFSET, offsetof(struct paca_struct, data_offset)); + DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save)); DEFINE(SLBSHADOW_STACKVSID, offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].vsid)); diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index aff5398a5f63..1111fcec7673 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -278,8 +278,12 @@ exception_marker: beq- 1f; \ ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ - bge- cr1,bad_stack; /* abort if it is */ \ - std r9,_CCR(r1); /* save CR in stackframe */ \ + bge- cr1,2f; /* abort if it is */ \ + b 3f; \ +2: li r1,(n); /* will be reloaded later */ \ + sth r1,PACA_TRAP_SAVE(r13); \ + b bad_stack; \ +3: std r9,_CCR(r1); /* save CR in stackframe */ \ std r11,_NIP(r1); /* save SRR0 in stackframe */ \ std r12,_MSR(r1); /* save SRR1 in stackframe */ \ std r10,0(r1); /* make stack chain pointer */ \ @@ -940,6 +944,8 @@ bad_stack: SAVE_2GPRS(7,r1) SAVE_10GPRS(12,r1) SAVE_10GPRS(22,r1) + lhz r12,PACA_TRAP_SAVE(r13) + std r12,_TRAP(r1) addi r11,r1,INT_FRAME_SIZE std r11,0(r1) li r12,0 |