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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-02-02 15:34:10 +1000 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2018-02-08 18:21:42 -0600 |
| commit | d5378d2a0d54793ee59cd460e465fd0471bdd703 (patch) | |
| tree | 800467f2c73b98f79c3e3ec25f10a2d61b78dfb1 /asm/head.S | |
| parent | 92777d335ab3fe8e364014584b454ac48883993b (diff) | |
| download | blackbird-skiboot-d5378d2a0d54793ee59cd460e465fd0471bdd703.tar.gz blackbird-skiboot-d5378d2a0d54793ee59cd460e465fd0471bdd703.zip | |
core/exception: beautify exception handler, add MCE-involved registers
Print DSISR and DAR, to help with deciphering machine check exceptions,
and improve the output a bit, decode NIP symbol, improve alignment, etc.
Also print a specific header for machine check, because we do expect to
see these if there is a hardware failure.
Before:
[ 0.005968779,3] ***********************************************
[ 0.005974102,3] Unexpected exception 200 !
[ 0.005978696,3] SRR0 : 000000003002ad80 SRR1 : 9000000000001000
[ 0.005985239,3] HSRR0: 00000000300027b4 HSRR1: 9000000030001000
[ 0.005991782,3] LR : 000000003002ad80 CTR : 0000000000000000
[ 0.005998130,3] CFAR : 00000000300b58bc
[ 0.006002769,3] CR : 40000004 XER: 20000000
[ 0.006008069,3] GPR00: 000000003002ad80 GPR16: 0000000000000000
[ 0.006015170,3] GPR01: 0000000031c03bd0 GPR17: 0000000000000000
[...]
After:
[ 0.003287941,3] ***********************************************
[ 0.003561769,3] Fatal MCE at 000000003002ad80 .nvram_init+0x24
[ 0.003579628,3] CFAR : 00000000300b5964
[ 0.003584268,3] SRR0 : 000000003002ad80 SRR1 : 9000000000001000
[ 0.003590812,3] HSRR0: 00000000300027b4 HSRR1: 9000000030001000
[ 0.003597355,3] DSISR: 00000000 DAR : 0000000000000000
[ 0.003603480,3] LR : 000000003002ad68 CTR : 0000000030093d80
[ 0.003609930,3] CR : 40000004 XER : 20000000
[ 0.003615698,3] GPR00: 00000000300149e8 GPR16: 0000000000000000
[ 0.003622799,3] GPR01: 0000000031c03bc0 GPR17: 0000000000000000
[...]
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'asm/head.S')
| -rw-r--r-- | asm/head.S | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -210,6 +210,10 @@ _exception: std %r4,STACK_SRR1(%r1) std %r5,STACK_HSRR0(%r1) std %r6,STACK_HSRR1(%r1) + mfspr %r3,SPR_DSISR + mfspr %r4,SPR_DAR + stw %r3,STACK_DSISR(%r1) + std %r4,STACK_DAR(%r1) mr %r3,%r1 LOAD_IMM64(%r4, SKIBOOT_BASE) LOAD_IMM32(%r5, exception_entry_foo - __head) |
