projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5d360a75 | 1 | /* |
| dfd9f7ab | 2 | * Copyright IBM Corp. 2008,2009 |
| 5d360a75 HC |
3 | * |
| 4 | * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, | |
| 5 | * | |
| 6 | */ | |
| 7 | ||
| cf087343 HC |
8 | #include <asm/asm-offsets.h> |
| 9 | ||
| dfd9f7ab HC |
10 | .globl ftrace_stub |
| 11 | ftrace_stub: | |
| 12 | br %r14 | |
| 13 | ||
| 14 | #ifdef CONFIG_64BIT | |
| 15 | ||
| 16 | #ifdef CONFIG_DYNAMIC_FTRACE | |
| 17 | ||
| 18 | .globl _mcount | |
| 5d360a75 | 19 | _mcount: |
| 5d360a75 HC |
20 | br %r14 |
| 21 | ||
| dfd9f7ab HC |
22 | .globl ftrace_caller |
| 23 | ftrace_caller: | |
| 8b4488f8 HC |
24 | larl %r1,function_trace_stop |
| 25 | icm %r1,0xf,0(%r1) | |
| 26 | bnzr %r14 | |
| dfd9f7ab HC |
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 | |
| 88dbd203 HC |
37 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 38 | .globl ftrace_graph_caller | |
| 39 | ftrace_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) | |
| 47 | 0: | |
| 48 | #endif | |
| dfd9f7ab HC |
49 | aghi %r15,160 |
| 50 | lmg %r2,%r5,32(%r15) | |
| 51 | lg %r14,112(%r15) | |
| 5d360a75 HC |
52 | br %r14 |
| 53 | ||
| dfd9f7ab HC |
54 | .data |
| 55 | .globl ftrace_dyn_func | |
| 56 | ftrace_dyn_func: | |
| 57 | .quad ftrace_stub | |
| 58 | .previous | |
| 59 | ||
| 60 | #else /* CONFIG_DYNAMIC_FTRACE */ | |
| 5d360a75 | 61 | |
| dfd9f7ab | 62 | .globl _mcount |
| 5d360a75 | 63 | _mcount: |
| 8b4488f8 HC |
64 | larl %r1,function_trace_stop |
| 65 | icm %r1,0xf,0(%r1) | |
| 66 | bnzr %r14 | |
| dfd9f7ab | 67 | stmg %r2,%r5,32(%r15) |
| 5d360a75 HC |
68 | stg %r14,112(%r15) |
| 69 | lgr %r1,%r15 | |
| 70 | aghi %r15,-160 | |
| cf087343 | 71 | stg %r1,__SF_BACKCHAIN(%r15) |
| 5d360a75 HC |
72 | lgr %r2,%r14 |
| 73 | lg %r3,168(%r15) | |
| 74 | larl %r14,ftrace_trace_function | |
| 75 | lg %r14,0(%r14) | |
| 76 | basr %r14,%r14 | |
| 88dbd203 HC |
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 | |
| 5d360a75 | 83 | aghi %r15,160 |
| dfd9f7ab | 84 | lmg %r2,%r5,32(%r15) |
| 5d360a75 HC |
85 | lg %r14,112(%r15) |
| 86 | br %r14 | |
| 87 | ||
| dfd9f7ab HC |
88 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
| 89 | ||
| 88dbd203 HC |
90 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 91 | ||
| 92 | .globl return_to_handler | |
| 93 | return_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 | ||
| dfd9f7ab HC |
106 | #else /* CONFIG_64BIT */ |
| 107 | ||
| 108 | #ifdef CONFIG_DYNAMIC_FTRACE | |
| 109 | ||
| 110 | .globl _mcount | |
| 111 | _mcount: | |
| 112 | br %r14 | |
| 113 | ||
| 114 | .globl ftrace_caller | |
| 115 | ftrace_caller: | |
| 116 | stm %r2,%r5,16(%r15) | |
| 8b4488f8 HC |
117 | bras %r1,2f |
| 118 | 0: .long ftrace_trace_function | |
| 119 | 1: .long function_trace_stop | |
| 120 | 2: l %r2,1b-0b(%r1) | |
| 121 | icm %r2,0xf,0(%r2) | |
| 122 | jnz 3f | |
| dfd9f7ab | 123 | st %r14,56(%r15) |
| 8b4488f8 | 124 | lr %r0,%r15 |
| dfd9f7ab HC |
125 | ahi %r15,-96 |
| 126 | l %r3,100(%r15) | |
| 127 | la %r2,0(%r14) | |
| 8b4488f8 | 128 | st %r0,__SF_BACKCHAIN(%r15) |
| dfd9f7ab | 129 | la %r3,0(%r3) |
| 8b4488f8 | 130 | l %r14,0b-0b(%r1) |
| dfd9f7ab HC |
131 | l %r14,0(%r14) |
| 132 | basr %r14,%r14 | |
| 88dbd203 HC |
133 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 134 | .globl ftrace_graph_caller | |
| 135 | ftrace_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 | |
| 141 | 0: l %r2,152(%r15) | |
| 142 | l %r4,0(%r1) | |
| 143 | l %r3,100(%r15) | |
| 144 | basr %r14,%r4 | |
| 145 | st %r2,100(%r15) | |
| 146 | 1: | |
| 147 | #endif | |
| dfd9f7ab | 148 | ahi %r15,96 |
| dfd9f7ab | 149 | l %r14,56(%r15) |
| 8b4488f8 | 150 | 3: lm %r2,%r5,16(%r15) |
| dfd9f7ab HC |
151 | br %r14 |
| 152 | ||
| 153 | .data | |
| 154 | .globl ftrace_dyn_func | |
| 155 | ftrace_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) | |
| 8b4488f8 HC |
164 | bras %r1,2f |
| 165 | 0: .long ftrace_trace_function | |
| 166 | 1: .long function_trace_stop | |
| 167 | 2: l %r2,1b-0b(%r1) | |
| 168 | icm %r2,0xf,0(%r2) | |
| 169 | jnz 3f | |
| dfd9f7ab | 170 | st %r14,56(%r15) |
| 8b4488f8 | 171 | lr %r0,%r15 |
| dfd9f7ab HC |
172 | ahi %r15,-96 |
| 173 | l %r3,100(%r15) | |
| 174 | la %r2,0(%r14) | |
| 8b4488f8 | 175 | st %r0,__SF_BACKCHAIN(%r15) |
| dfd9f7ab | 176 | la %r3,0(%r3) |
| 8b4488f8 | 177 | l %r14,0b-0b(%r1) |
| dfd9f7ab HC |
178 | l %r14,0(%r14) |
| 179 | basr %r14,%r14 | |
| 88dbd203 HC |
180 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 181 | bras %r1,0f | |
| 182 | .long prepare_ftrace_return | |
| 183 | 0: 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 | |
| dfd9f7ab | 189 | ahi %r15,96 |
| dfd9f7ab | 190 | l %r14,56(%r15) |
| 8b4488f8 | 191 | 3: lm %r2,%r5,16(%r15) |
| 5d360a75 HC |
192 | br %r14 |
| 193 | ||
| dfd9f7ab | 194 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
| 88dbd203 HC |
195 | |
| 196 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER | |
| 197 | ||
| 198 | .globl return_to_handler | |
| 199 | return_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 | |
| 207 | 0: 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 | ||
| 5d360a75 | 216 | #endif /* CONFIG_64BIT */ |