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authorDavid S. Miller <davem@davemloft.net>2010-04-13 01:36:03 -0400
committerDavid S. Miller <davem@davemloft.net>2010-04-13 01:36:03 -0400
commitddacd0bc70fe724eba2b5967dd5b68e10d41486c (patch)
tree43d80d0c693aaf66cc968b748ad0b92d62c7f602 /arch/sparc/lib
parent63b754957371c23b7515399a977a2e1d361a036c (diff)
sparc64: Kill CONFIG_STACK_DEBUG code.
The generic stack tracer does this job just as well. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib')
-rw-r--r--arch/sparc/lib/mcount.S74
1 files changed, 0 insertions, 74 deletions
diff --git a/arch/sparc/lib/mcount.S b/arch/sparc/lib/mcount.S
index 7047997be0eb..73ed0f3aaa0c 100644
--- a/arch/sparc/lib/mcount.S
+++ b/arch/sparc/lib/mcount.S
@@ -7,26 +7,11 @@
7 7
8#include <linux/linkage.h> 8#include <linux/linkage.h>
9 9
10#include <asm/ptrace.h>
11#include <asm/thread_info.h>
12
13/* 10/*
14 * This is the main variant and is called by C code. GCC's -pg option 11 * This is the main variant and is called by C code. GCC's -pg option
15 * automatically instruments every C function with a call to this. 12 * automatically instruments every C function with a call to this.
16 */ 13 */
17 14
18#ifdef CONFIG_STACK_DEBUG
19
20#define OVSTACKSIZE 4096 /* lets hope this is enough */
21
22 .data
23 .align 8
24panicstring:
25 .asciz "Stack overflow\n"
26 .align 8
27ovstack:
28 .skip OVSTACKSIZE
29#endif
30 .text 15 .text
31 .align 32 16 .align 32
32 .globl _mcount 17 .globl _mcount
@@ -35,65 +20,6 @@ ovstack:
35 .type mcount,#function 20 .type mcount,#function
36_mcount: 21_mcount:
37mcount: 22mcount:
38#ifdef CONFIG_STACK_DEBUG
39 /*
40 * Check whether %sp is dangerously low.
41 */
42 ldub [%g6 + TI_FPDEPTH], %g1
43 srl %g1, 1, %g3
44 add %g3, 1, %g3
45 sllx %g3, 8, %g3 ! each fpregs frame is 256b
46 add %g3, 192, %g3
47 add %g6, %g3, %g3 ! where does task_struct+frame end?
48 sub %g3, STACK_BIAS, %g3
49 cmp %sp, %g3
50 bg,pt %xcc, 1f
51 nop
52 lduh [%g6 + TI_CPU], %g1
53 sethi %hi(hardirq_stack), %g3
54 or %g3, %lo(hardirq_stack), %g3
55 sllx %g1, 3, %g1
56 ldx [%g3 + %g1], %g7
57 sub %g7, STACK_BIAS, %g7
58 cmp %sp, %g7
59 bleu,pt %xcc, 2f
60 sethi %hi(THREAD_SIZE), %g3
61 add %g7, %g3, %g7
62 cmp %sp, %g7
63 blu,pn %xcc, 1f
642: sethi %hi(softirq_stack), %g3
65 or %g3, %lo(softirq_stack), %g3
66 ldx [%g3 + %g1], %g7
67 sub %g7, STACK_BIAS, %g7
68 cmp %sp, %g7
69 bleu,pt %xcc, 3f
70 sethi %hi(THREAD_SIZE), %g3
71 add %g7, %g3, %g7
72 cmp %sp, %g7
73 blu,pn %xcc, 1f
74 nop
75 /* If we are already on ovstack, don't hop onto it
76 * again, we are already trying to output the stack overflow
77 * message.
78 */
793: sethi %hi(ovstack), %g7 ! cant move to panic stack fast enough
80 or %g7, %lo(ovstack), %g7
81 add %g7, OVSTACKSIZE, %g3
82 sub %g3, STACK_BIAS + 192, %g3
83 sub %g7, STACK_BIAS, %g7
84 cmp %sp, %g7
85 blu,pn %xcc, 2f
86 cmp %sp, %g3
87 bleu,pn %xcc, 1f
88 nop
892: mov %g3, %sp
90 sethi %hi(panicstring), %g3
91 call prom_printf
92 or %g3, %lo(panicstring), %o0
93 call prom_halt
94 nop
951:
96#endif
97#ifdef CONFIG_FUNCTION_TRACER 23#ifdef CONFIG_FUNCTION_TRACER
98#ifdef CONFIG_DYNAMIC_FTRACE 24#ifdef CONFIG_DYNAMIC_FTRACE
99 /* Do nothing, the retl/nop below is all we need. */ 25 /* Do nothing, the retl/nop below is all we need. */