860dba45e8
Add kprobes annotations to get the massive 'probe kernel.function("*") {}'
stress test working.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
91 lines
1.5 KiB
ArmAsm
91 lines
1.5 KiB
ArmAsm
/*
|
|
* Copyright IBM Corp. 2008,2009
|
|
*
|
|
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
|
|
*
|
|
*/
|
|
|
|
#include <asm/asm-offsets.h>
|
|
|
|
.section .kprobes.text, "ax"
|
|
|
|
.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
|