diff options
author | Sam Ravnborg <sam@ravnborg.org> | 2008-12-03 06:10:25 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-12-04 12:17:19 -0500 |
commit | 478b8fecda511942404ac232897a718cecd13e48 (patch) | |
tree | e022fce8ca92f93a000e1cd686255f0b126e9fd5 /arch/sparc/lib/mcount.S | |
parent | 18269c0fd4db9bec2668f895f21d742486ccb90f (diff) |
sparc,sparc64: unify lib/
o Renamed files in sparc64 to <name>_64.S when identical
to sparc32 files.
o iomap.c were equal for sparc32 and sparc64
o adjusted sparc/Makefile now we have only one lib/
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib/mcount.S')
-rw-r--r-- | arch/sparc/lib/mcount.S | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/arch/sparc/lib/mcount.S b/arch/sparc/lib/mcount.S new file mode 100644 index 000000000000..7ce9c65f3592 --- /dev/null +++ b/arch/sparc/lib/mcount.S | |||
@@ -0,0 +1,143 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com) | ||
3 | * | ||
4 | * This file implements mcount(), which is used to collect profiling data. | ||
5 | * This can also be tweaked for kernel stack overflow detection. | ||
6 | */ | ||
7 | |||
8 | #include <linux/linkage.h> | ||
9 | |||
10 | #include <asm/ptrace.h> | ||
11 | #include <asm/thread_info.h> | ||
12 | |||
13 | /* | ||
14 | * 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. | ||
16 | */ | ||
17 | |||
18 | #ifdef CONFIG_STACK_DEBUG | ||
19 | |||
20 | #define OVSTACKSIZE 4096 /* lets hope this is enough */ | ||
21 | |||
22 | .data | ||
23 | .align 8 | ||
24 | panicstring: | ||
25 | .asciz "Stack overflow\n" | ||
26 | .align 8 | ||
27 | ovstack: | ||
28 | .skip OVSTACKSIZE | ||
29 | #endif | ||
30 | .text | ||
31 | .align 32 | ||
32 | .globl _mcount | ||
33 | .type _mcount,#function | ||
34 | .globl mcount | ||
35 | .type mcount,#function | ||
36 | _mcount: | ||
37 | mcount: | ||
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 | ||
64 | 2: sethi %hi(softirq_stack), %g3 | ||
65 | or %g3, %lo(softirq_stack), %g3 | ||
66 | ldx [%g3 + %g1], %g7 | ||
67 | cmp %sp, %g7 | ||
68 | bleu,pt %xcc, 2f | ||
69 | sethi %hi(THREAD_SIZE), %g3 | ||
70 | add %g7, %g3, %g7 | ||
71 | cmp %sp, %g7 | ||
72 | blu,pn %xcc, 1f | ||
73 | nop | ||
74 | /* If we are already on ovstack, don't hop onto it | ||
75 | * again, we are already trying to output the stack overflow | ||
76 | * message. | ||
77 | */ | ||
78 | sethi %hi(ovstack), %g7 ! cant move to panic stack fast enough | ||
79 | or %g7, %lo(ovstack), %g7 | ||
80 | add %g7, OVSTACKSIZE, %g3 | ||
81 | sub %g3, STACK_BIAS + 192, %g3 | ||
82 | sub %g7, STACK_BIAS, %g7 | ||
83 | cmp %sp, %g7 | ||
84 | blu,pn %xcc, 2f | ||
85 | cmp %sp, %g3 | ||
86 | bleu,pn %xcc, 1f | ||
87 | nop | ||
88 | 2: mov %g3, %sp | ||
89 | sethi %hi(panicstring), %g3 | ||
90 | call prom_printf | ||
91 | or %g3, %lo(panicstring), %o0 | ||
92 | call prom_halt | ||
93 | nop | ||
94 | 1: | ||
95 | #endif | ||
96 | #ifdef CONFIG_FUNCTION_TRACER | ||
97 | #ifdef CONFIG_DYNAMIC_FTRACE | ||
98 | mov %o7, %o0 | ||
99 | .globl mcount_call | ||
100 | mcount_call: | ||
101 | call ftrace_stub | ||
102 | mov %o0, %o7 | ||
103 | #else | ||
104 | sethi %hi(ftrace_trace_function), %g1 | ||
105 | sethi %hi(ftrace_stub), %g2 | ||
106 | ldx [%g1 + %lo(ftrace_trace_function)], %g1 | ||
107 | or %g2, %lo(ftrace_stub), %g2 | ||
108 | cmp %g1, %g2 | ||
109 | be,pn %icc, 1f | ||
110 | mov %i7, %o1 | ||
111 | jmpl %g1, %g0 | ||
112 | mov %o7, %o0 | ||
113 | /* not reached */ | ||
114 | 1: | ||
115 | #endif | ||
116 | #endif | ||
117 | retl | ||
118 | nop | ||
119 | .size _mcount,.-_mcount | ||
120 | .size mcount,.-mcount | ||
121 | |||
122 | #ifdef CONFIG_FUNCTION_TRACER | ||
123 | .globl ftrace_stub | ||
124 | .type ftrace_stub,#function | ||
125 | ftrace_stub: | ||
126 | retl | ||
127 | nop | ||
128 | .size ftrace_stub,.-ftrace_stub | ||
129 | #ifdef CONFIG_DYNAMIC_FTRACE | ||
130 | .globl ftrace_caller | ||
131 | .type ftrace_caller,#function | ||
132 | ftrace_caller: | ||
133 | mov %i7, %o1 | ||
134 | mov %o7, %o0 | ||
135 | .globl ftrace_call | ||
136 | ftrace_call: | ||
137 | call ftrace_stub | ||
138 | mov %o0, %o7 | ||
139 | retl | ||
140 | nop | ||
141 | .size ftrace_caller,.-ftrace_caller | ||
142 | #endif | ||
143 | #endif | ||