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-rw-r--r--arch/s390/kernel/mcount.S212
1 files changed, 185 insertions, 27 deletions
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 80641224a095..2a0a5e97ba8c 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -1,5 +1,5 @@
1/* 1/*
2 * Copyright IBM Corp. 2008 2 * Copyright IBM Corp. 2008,2009
3 * 3 *
4 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, 4 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
5 * 5 *
@@ -7,36 +7,64 @@
7 7
8#include <asm/asm-offsets.h> 8#include <asm/asm-offsets.h>
9 9
10#ifndef CONFIG_64BIT 10 .globl ftrace_stub
11.globl _mcount 11ftrace_stub:
12 br %r14
13
14#ifdef CONFIG_64BIT
15
16#ifdef CONFIG_DYNAMIC_FTRACE
17
18 .globl _mcount
12_mcount: 19_mcount:
13 stm %r0,%r5,8(%r15)
14 st %r14,56(%r15)
15 lr %r1,%r15
16 ahi %r15,-96
17 l %r3,100(%r15)
18 la %r2,0(%r14)
19 st %r1,__SF_BACKCHAIN(%r15)
20 la %r3,0(%r3)
21 bras %r14,0f
22 .long ftrace_trace_function
230: l %r14,0(%r14)
24 l %r14,0(%r14)
25 basr %r14,%r14
26 ahi %r15,96
27 lm %r0,%r5,8(%r15)
28 l %r14,56(%r15)
29 br %r14 20 br %r14
30 21
31.globl ftrace_stub 22 .globl ftrace_caller
32ftrace_stub: 23ftrace_caller:
24 larl %r1,function_trace_stop
25 icm %r1,0xf,0(%r1)
26 bnzr %r14
27 stmg %r2,%r5,32(%r15)
28 stg %r14,112(%r15)
29 lgr %r1,%r15
30 aghi %r15,-160
31 stg %r1,__SF_BACKCHAIN(%r15)
32 lgr %r2,%r14
33 lg %r3,168(%r15)
34 larl %r14,ftrace_dyn_func
35 lg %r14,0(%r14)
36 basr %r14,%r14
37#ifdef CONFIG_FUNCTION_GRAPH_TRACER
38 .globl ftrace_graph_caller
39ftrace_graph_caller:
40 # This unconditional branch gets runtime patched. Change only if
41 # you know what you are doing. See ftrace_enable_graph_caller().
42 j 0f
43 lg %r2,272(%r15)
44 lg %r3,168(%r15)
45 brasl %r14,prepare_ftrace_return
46 stg %r2,168(%r15)
470:
48#endif
49 aghi %r15,160
50 lmg %r2,%r5,32(%r15)
51 lg %r14,112(%r15)
33 br %r14 52 br %r14
34 53
35#else /* CONFIG_64BIT */ 54 .data
55 .globl ftrace_dyn_func
56ftrace_dyn_func:
57 .quad ftrace_stub
58 .previous
59
60#else /* CONFIG_DYNAMIC_FTRACE */
36 61
37.globl _mcount 62 .globl _mcount
38_mcount: 63_mcount:
39 stmg %r0,%r5,16(%r15) 64 larl %r1,function_trace_stop
65 icm %r1,0xf,0(%r1)
66 bnzr %r14
67 stmg %r2,%r5,32(%r15)
40 stg %r14,112(%r15) 68 stg %r14,112(%r15)
41 lgr %r1,%r15 69 lgr %r1,%r15
42 aghi %r15,-160 70 aghi %r15,-160
@@ -46,13 +74,143 @@ _mcount:
46 larl %r14,ftrace_trace_function 74 larl %r14,ftrace_trace_function
47 lg %r14,0(%r14) 75 lg %r14,0(%r14)
48 basr %r14,%r14 76 basr %r14,%r14
77#ifdef CONFIG_FUNCTION_GRAPH_TRACER
78 lg %r2,272(%r15)
79 lg %r3,168(%r15)
80 brasl %r14,prepare_ftrace_return
81 stg %r2,168(%r15)
82#endif
49 aghi %r15,160 83 aghi %r15,160
50 lmg %r0,%r5,16(%r15) 84 lmg %r2,%r5,32(%r15)
51 lg %r14,112(%r15) 85 lg %r14,112(%r15)
52 br %r14 86 br %r14
53 87
54.globl ftrace_stub 88#endif /* CONFIG_DYNAMIC_FTRACE */
55ftrace_stub: 89
90#ifdef CONFIG_FUNCTION_GRAPH_TRACER
91
92 .globl return_to_handler
93return_to_handler:
94 stmg %r2,%r5,32(%r15)
95 lgr %r1,%r15
96 aghi %r15,-160
97 stg %r1,__SF_BACKCHAIN(%r15)
98 brasl %r14,ftrace_return_to_handler
99 aghi %r15,160
100 lgr %r14,%r2
101 lmg %r2,%r5,32(%r15)
102 br %r14
103
104#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
105
106#else /* CONFIG_64BIT */
107
108#ifdef CONFIG_DYNAMIC_FTRACE
109
110 .globl _mcount
111_mcount:
112 br %r14
113
114 .globl ftrace_caller
115ftrace_caller:
116 stm %r2,%r5,16(%r15)
117 bras %r1,2f
1180: .long ftrace_trace_function
1191: .long function_trace_stop
1202: l %r2,1b-0b(%r1)
121 icm %r2,0xf,0(%r2)
122 jnz 3f
123 st %r14,56(%r15)
124 lr %r0,%r15
125 ahi %r15,-96
126 l %r3,100(%r15)
127 la %r2,0(%r14)
128 st %r0,__SF_BACKCHAIN(%r15)
129 la %r3,0(%r3)
130 l %r14,0b-0b(%r1)
131 l %r14,0(%r14)
132 basr %r14,%r14
133#ifdef CONFIG_FUNCTION_GRAPH_TRACER
134 .globl ftrace_graph_caller
135ftrace_graph_caller:
136 # This unconditional branch gets runtime patched. Change only if
137 # you know what you are doing. See ftrace_enable_graph_caller().
138 j 1f
139 bras %r1,0f
140 .long prepare_ftrace_return
1410: l %r2,152(%r15)
142 l %r4,0(%r1)
143 l %r3,100(%r15)
144 basr %r14,%r4
145 st %r2,100(%r15)
1461:
147#endif
148 ahi %r15,96
149 l %r14,56(%r15)
1503: lm %r2,%r5,16(%r15)
56 br %r14 151 br %r14
57 152
153 .data
154 .globl ftrace_dyn_func
155ftrace_dyn_func:
156 .long ftrace_stub
157 .previous
158
159#else /* CONFIG_DYNAMIC_FTRACE */
160
161 .globl _mcount
162_mcount:
163 stm %r2,%r5,16(%r15)
164 bras %r1,2f
1650: .long ftrace_trace_function
1661: .long function_trace_stop
1672: l %r2,1b-0b(%r1)
168 icm %r2,0xf,0(%r2)
169 jnz 3f
170 st %r14,56(%r15)
171 lr %r0,%r15
172 ahi %r15,-96
173 l %r3,100(%r15)
174 la %r2,0(%r14)
175 st %r0,__SF_BACKCHAIN(%r15)
176 la %r3,0(%r3)
177 l %r14,0b-0b(%r1)
178 l %r14,0(%r14)
179 basr %r14,%r14
180#ifdef CONFIG_FUNCTION_GRAPH_TRACER
181 bras %r1,0f
182 .long prepare_ftrace_return
1830: l %r2,152(%r15)
184 l %r4,0(%r1)
185 l %r3,100(%r15)
186 basr %r14,%r4
187 st %r2,100(%r15)
188#endif
189 ahi %r15,96
190 l %r14,56(%r15)
1913: lm %r2,%r5,16(%r15)
192 br %r14
193
194#endif /* CONFIG_DYNAMIC_FTRACE */
195
196#ifdef CONFIG_FUNCTION_GRAPH_TRACER
197
198 .globl return_to_handler
199return_to_handler:
200 stm %r2,%r5,16(%r15)
201 st %r14,56(%r15)
202 lr %r0,%r15
203 ahi %r15,-96
204 st %r0,__SF_BACKCHAIN(%r15)
205 bras %r1,0f
206 .long ftrace_return_to_handler
2070: l %r2,0b-0b(%r1)
208 basr %r14,%r2
209 lr %r14,%r2
210 ahi %r15,96
211 lm %r2,%r5,16(%r15)
212 br %r14
213
214#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
215
58#endif /* CONFIG_64BIT */ 216#endif /* CONFIG_64BIT */
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-09 09:28:11 -0500