| /* |
| * Copyright IBM Corp. 2008,2009 |
| * |
| * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, |
| * |
| */ |
| |
| #include <asm/asm-offsets.h> |
| |
| .globl ftrace_stub |
| ftrace_stub: |
| br %r14 |
| |
| .globl _mcount |
| _mcount: |
| #ifdef CONFIG_DYNAMIC_FTRACE |
| br %r14 |
| |
| .data |
| .globl ftrace_dyn_func |
| ftrace_dyn_func: |
| .long ftrace_stub |
| .previous |
| |
| .globl ftrace_caller |
| ftrace_caller: |
| #endif |
| stm %r2,%r5,16(%r15) |
| bras %r1,2f |
| #ifdef CONFIG_DYNAMIC_FTRACE |
| 0: .long ftrace_dyn_func |
| #else |
| 0: .long ftrace_trace_function |
| #endif |
| 1: .long function_trace_stop |
| 2: l %r2,1b-0b(%r1) |
| icm %r2,0xf,0(%r2) |
| jnz 3f |
| st %r14,56(%r15) |
| lr %r0,%r15 |
| ahi %r15,-96 |
| l %r3,100(%r15) |
| la %r2,0(%r14) |
| st %r0,__SF_BACKCHAIN(%r15) |
| la %r3,0(%r3) |
| l %r14,0b-0b(%r1) |
| l %r14,0(%r14) |
| basr %r14,%r14 |
| #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| #ifdef CONFIG_DYNAMIC_FTRACE |
| .globl ftrace_graph_caller |
| ftrace_graph_caller: |
| # This unconditional branch gets runtime patched. Change only if |
| # you know what you are doing. See ftrace_enable_graph_caller(). |
| j 1f |
| #endif |
| bras %r1,0f |
| .long prepare_ftrace_return |
| 0: l %r2,152(%r15) |
| l %r4,0(%r1) |
| l %r3,100(%r15) |
| basr %r14,%r4 |
| st %r2,100(%r15) |
| 1: |
| #endif |
| ahi %r15,96 |
| l %r14,56(%r15) |
| 3: lm %r2,%r5,16(%r15) |
| br %r14 |
| |
| #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| |
| .globl return_to_handler |
| return_to_handler: |
| stm %r2,%r5,16(%r15) |
| st %r14,56(%r15) |
| lr %r0,%r15 |
| ahi %r15,-96 |
| st %r0,__SF_BACKCHAIN(%r15) |
| bras %r1,0f |
| .long ftrace_return_to_handler |
| 0: l %r2,0b-0b(%r1) |
| basr %r14,%r2 |
| lr %r14,%r2 |
| ahi %r15,96 |
| lm %r2,%r5,16(%r15) |
| br %r14 |
| |
| #endif |
