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gerrit-public.fairphone.software / kernel / msm-4.9 / 581048527071d09cbaa62943a44296b63a1799d1 / . / arch / sparc / lib / mcount.S
blob: 194f383611c02f815431f90dfd662c3718f3b4a8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8#include <linux/linkage.h>
Al Virod3867f042016-01-16 21:39:30 -0500[diff] [blame]9#include <asm/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]10
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]11/*
12 * This is the main variant and is called by C code. GCC's -pg option
13 * automatically instruments every C function with a call to this.
14 */
15
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]16 .text
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]17 .align 32
18 .globl _mcount
19 .type _mcount,#function
Al Virod3867f042016-01-16 21:39:30 -0500[diff] [blame]20 EXPORT_SYMBOL(_mcount)
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]21 .globl mcount
22 .type mcount,#function
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]23_mcount:
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]24mcount:
Steven Rostedt606576c2008-10-06 19:06:12 -0400[diff] [blame]25#ifdef CONFIG_FUNCTION_TRACER
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]26#ifdef CONFIG_DYNAMIC_FTRACE
David S. Miller63b75492010-04-12 22:35:24 -0700[diff] [blame]27 /* Do nothing, the retl/nop below is all we need. */
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]28#else
Steven Rostedt (Red Hat)2563b9d2014-06-25 12:22:53 -0400[diff] [blame]29 sethi %hi(ftrace_trace_function), %g1
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]30 sethi %hi(ftrace_stub), %g2
31 ldx [%g1 + %lo(ftrace_trace_function)], %g1
32 or %g2, %lo(ftrace_stub), %g2
33 cmp %g1, %g2
34 be,pn %icc, 1f
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]35 mov %i7, %g3
David S. Miller035df352010-04-13 18:59:02 -0700[diff] [blame]36 save %sp, -176, %sp
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]37 mov %g3, %o1
David S. Millera71d1d62010-04-06 19:59:46 -0700[diff] [blame]38 jmpl %g1, %o7
39 mov %i7, %o0
40 ret
41 restore
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]42 /* not reached */
431:
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]44#ifdef CONFIG_FUNCTION_GRAPH_TRACER
45 sethi %hi(ftrace_graph_return), %g1
46 ldx [%g1 + %lo(ftrace_graph_return)], %g3
47 cmp %g2, %g3
48 bne,pn %xcc, 5f
49 sethi %hi(ftrace_graph_entry_stub), %g2
50 sethi %hi(ftrace_graph_entry), %g1
51 or %g2, %lo(ftrace_graph_entry_stub), %g2
52 ldx [%g1 + %lo(ftrace_graph_entry)], %g1
53 cmp %g1, %g2
54 be,pt %xcc, 2f
55 nop
565: mov %i7, %g2
57 mov %fp, %g3
David S. Miller035df352010-04-13 18:59:02 -0700[diff] [blame]58 save %sp, -176, %sp
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]59 mov %g2, %l0
60 ba,pt %xcc, ftrace_graph_caller
61 mov %g3, %l1
62#endif
632:
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]64#endif
65#endif
66 retl
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]67 nop
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]68 .size _mcount,.-_mcount
69 .size mcount,.-mcount
70
Steven Rostedt606576c2008-10-06 19:06:12 -0400[diff] [blame]71#ifdef CONFIG_FUNCTION_TRACER
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]72 .globl ftrace_stub
73 .type ftrace_stub,#function
74ftrace_stub:
75 retl
76 nop
77 .size ftrace_stub,.-ftrace_stub
78#ifdef CONFIG_DYNAMIC_FTRACE
79 .globl ftrace_caller
80 .type ftrace_caller,#function
81ftrace_caller:
David S. Millera71d1d62010-04-06 19:59:46 -0700[diff] [blame]82 mov %i7, %g2
Steven Rostedt (Red Hat)2563b9d2014-06-25 12:22:53 -0400[diff] [blame]83 mov %fp, %g3
David S. Miller035df352010-04-13 18:59:02 -0700[diff] [blame]84 save %sp, -176, %sp
David S. Millera71d1d62010-04-06 19:59:46 -0700[diff] [blame]85 mov %g2, %o1
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]86 mov %g2, %l0
87 mov %g3, %l1
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]88 .globl ftrace_call
89ftrace_call:
90 call ftrace_stub
David S. Millera71d1d62010-04-06 19:59:46 -0700[diff] [blame]91 mov %i7, %o0
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]92#ifdef CONFIG_FUNCTION_GRAPH_TRACER
93 .globl ftrace_graph_call
94ftrace_graph_call:
95 call ftrace_stub
96 nop
97#endif
David S. Millera71d1d62010-04-06 19:59:46 -0700[diff] [blame]98 ret
99 restore
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]100#ifdef CONFIG_FUNCTION_GRAPH_TRACER
101 .size ftrace_graph_call,.-ftrace_graph_call
102#endif
David S. Miller63b75492010-04-12 22:35:24 -0700[diff] [blame]103 .size ftrace_call,.-ftrace_call
David Millerd05f5f92008-05-13 22:06:59 -0700[diff] [blame]104 .size ftrace_caller,.-ftrace_caller
105#endif
106#endif
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]107
108#ifdef CONFIG_FUNCTION_GRAPH_TRACER
109ENTRY(ftrace_graph_caller)
110 mov %l0, %o0
111 mov %i7, %o1
112 call prepare_ftrace_return
113 mov %l1, %o2
114 ret
115 restore %o0, -8, %i7
116END(ftrace_graph_caller)
117
118ENTRY(return_to_handler)
David S. Miller035df352010-04-13 18:59:02 -0700[diff] [blame]119 save %sp, -176, %sp
David S. Miller9960e9e2010-04-07 04:41:33 -0700[diff] [blame]120 call ftrace_return_to_handler
121 mov %fp, %o0
122 jmpl %o0 + 8, %g0
123 restore
124END(return_to_handler)
125#endif