mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-23 09:56:00 +00:00
68 lines
1.2 KiB
ArmAsm
68 lines
1.2 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
|
|
|
|
.globl ftrace_caller
|
|
ftrace_caller:
|
|
#endif
|
|
larl %r1,function_trace_stop
|
|
icm %r1,0xf,0(%r1)
|
|
bnzr %r14
|
|
stmg %r2,%r5,32(%r15)
|
|
stg %r14,112(%r15)
|
|
lgr %r1,%r15
|
|
aghi %r15,-160
|
|
stg %r1,__SF_BACKCHAIN(%r15)
|
|
lgr %r2,%r14
|
|
lg %r3,168(%r15)
|
|
larl %r14,ftrace_trace_function
|
|
lg %r14,0(%r14)
|
|
basr %r14,%r14
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
lg %r2,168(%r15)
|
|
lg %r3,272(%r15)
|
|
.globl ftrace_graph_caller
|
|
ftrace_graph_caller:
|
|
# The bras instruction gets runtime patched to call prepare_ftrace_return.
|
|
# See ftrace_enable_ftrace_graph_caller. The patched instruction is:
|
|
# bras %r14,prepare_ftrace_return
|
|
bras %r14,0f
|
|
0: stg %r2,168(%r15)
|
|
#endif
|
|
aghi %r15,160
|
|
lmg %r2,%r5,32(%r15)
|
|
lg %r14,112(%r15)
|
|
br %r14
|
|
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
|
|
.globl return_to_handler
|
|
return_to_handler:
|
|
stmg %r2,%r5,32(%r15)
|
|
lgr %r1,%r15
|
|
aghi %r15,-160
|
|
stg %r1,__SF_BACKCHAIN(%r15)
|
|
brasl %r14,ftrace_return_to_handler
|
|
aghi %r15,160
|
|
lgr %r14,%r2
|
|
lmg %r2,%r5,32(%r15)
|
|
br %r14
|
|
|
|
#endif
|