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-rw-r--r--arch/sparc64/lib/mcount.S39
1 files changed, 36 insertions, 3 deletions
diff --git a/arch/sparc64/lib/mcount.S b/arch/sparc64/lib/mcount.S
index 7735a7a6053..fad90ddb3a2 100644
--- a/arch/sparc64/lib/mcount.S
+++ b/arch/sparc64/lib/mcount.S
@@ -48,12 +48,45 @@ mcount:
sub %g3, STACK_BIAS, %g3
cmp %sp, %g3
bg,pt %xcc, 1f
- sethi %hi(panicstring), %g3
+ nop
+ lduh [%g6 + TI_CPU], %g1
+ sethi %hi(hardirq_stack), %g3
+ or %g3, %lo(hardirq_stack), %g3
+ sllx %g1, 3, %g1
+ ldx [%g3 + %g1], %g7
+ sub %g7, STACK_BIAS, %g7
+ cmp %sp, %g7
+ bleu,pt %xcc, 2f
+ sethi %hi(THREAD_SIZE), %g3
+ add %g7, %g3, %g7
+ cmp %sp, %g7
+ blu,pn %xcc, 1f
+2: sethi %hi(softirq_stack), %g3
+ or %g3, %lo(softirq_stack), %g3
+ ldx [%g3 + %g1], %g7
+ cmp %sp, %g7
+ bleu,pt %xcc, 2f
+ sethi %hi(THREAD_SIZE), %g3
+ add %g7, %g3, %g7
+ cmp %sp, %g7
+ blu,pn %xcc, 1f
+ nop
+ /* If we are already on ovstack, don't hop onto it
+ * again, we are already trying to output the stack overflow
+ * message.
+ */
sethi %hi(ovstack), %g7 ! cant move to panic stack fast enough
or %g7, %lo(ovstack), %g7
- add %g7, OVSTACKSIZE, %g7
+ add %g7, OVSTACKSIZE, %g3
+ sub %g3, STACK_BIAS + 192, %g3
sub %g7, STACK_BIAS, %g7
- mov %g7, %sp
+ cmp %sp, %g7
+ blu,pn %xcc, 2f
+ cmp %sp, %g3
+ bleu,pn %xcc, 1f
+ nop
+2: mov %g3, %sp
+ sethi %hi(panicstring), %g3
call prom_printf
or %g3, %lo(panicstring), %o0
call prom_halt