projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5d360a75 | 1 | /* |
| a53c8fab | 2 | * Copyright IBM Corp. 2008, 2009 |
| 5d360a75 HC |
3 | * |
| 4 | * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, | |
| 5 | * | |
| 6 | */ | |
| 7 | ||
| 144d634a | 8 | #include <linux/linkage.h> |
| cf087343 | 9 | #include <asm/asm-offsets.h> |
| aca91209 | 10 | #include <asm/ftrace.h> |
| cf087343 | 11 | |
| 860dba45 MS |
12 | .section .kprobes.text, "ax" |
| 13 | ||
| 144d634a | 14 | ENTRY(ftrace_stub) |
| dfd9f7ab HC |
15 | br %r14 |
| 16 | ||
| 144d634a | 17 | ENTRY(_mcount) |
| 6ac2a4dd | 18 | #ifdef CONFIG_DYNAMIC_FTRACE |
| 5d360a75 HC |
19 | br %r14 |
| 20 | ||
| 144d634a | 21 | ENTRY(ftrace_caller) |
| 6ac2a4dd | 22 | #endif |
| dfd9f7ab | 23 | stm %r2,%r5,16(%r15) |
| 2a62a57a | 24 | bras %r1,1f |
| 8b4488f8 | 25 | 0: .long ftrace_trace_function |
| 2a62a57a | 26 | 1: st %r14,56(%r15) |
| 8b4488f8 | 27 | lr %r0,%r15 |
| dfd9f7ab HC |
28 | ahi %r15,-96 |
| 29 | l %r3,100(%r15) | |
| 30 | la %r2,0(%r14) | |
| 8b4488f8 | 31 | st %r0,__SF_BACKCHAIN(%r15) |
| dfd9f7ab | 32 | la %r3,0(%r3) |
| aca91209 | 33 | ahi %r2,-MCOUNT_INSN_SIZE |
| 8b4488f8 | 34 | l %r14,0b-0b(%r1) |
| dfd9f7ab HC |
35 | l %r14,0(%r14) |
| 36 | basr %r14,%r14 | |
| 88dbd203 | 37 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 4cc9bed0 MS |
38 | l %r2,100(%r15) |
| 39 | l %r3,152(%r15) | |
| 144d634a | 40 | ENTRY(ftrace_graph_caller) |
| 4cc9bed0 MS |
41 | # The bras instruction gets runtime patched to call prepare_ftrace_return. |
| 42 | # See ftrace_enable_ftrace_graph_caller. The patched instruction is: | |
| 43 | # bras %r14,prepare_ftrace_return | |
| 44 | bras %r14,0f | |
| 45 | 0: st %r2,100(%r15) | |
| 88dbd203 | 46 | #endif |
| dfd9f7ab | 47 | ahi %r15,96 |
| dfd9f7ab | 48 | l %r14,56(%r15) |
| 2a62a57a | 49 | lm %r2,%r5,16(%r15) |
| 5d360a75 HC |
50 | br %r14 |
| 51 | ||
| 88dbd203 HC |
52 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 53 | ||
| 144d634a | 54 | ENTRY(return_to_handler) |
| 88dbd203 HC |
55 | stm %r2,%r5,16(%r15) |
| 56 | st %r14,56(%r15) | |
| 57 | lr %r0,%r15 | |
| 58 | ahi %r15,-96 | |
| 59 | st %r0,__SF_BACKCHAIN(%r15) | |
| 60 | bras %r1,0f | |
| 61 | .long ftrace_return_to_handler | |
| 62 | 0: l %r2,0b-0b(%r1) | |
| 63 | basr %r14,%r2 | |
| 64 | lr %r14,%r2 | |
| 65 | ahi %r15,96 | |
| 66 | lm %r2,%r5,16(%r15) | |
| 67 | br %r14 | |
| 68 | ||
| 6ac2a4dd | 69 | #endif |