a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
71 lines
1.3 KiB
ArmAsm
71 lines
1.3 KiB
ArmAsm
/*
|
|
* Copyright IBM Corp. 2008, 2009
|
|
*
|
|
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
|
|
*
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
.section .kprobes.text, "ax"
|
|
|
|
ENTRY(ftrace_stub)
|
|
br %r14
|
|
|
|
ENTRY(_mcount)
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
br %r14
|
|
|
|
ENTRY(ftrace_caller)
|
|
#endif
|
|
stm %r2,%r5,16(%r15)
|
|
bras %r1,2f
|
|
0: .long ftrace_trace_function
|
|
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
|
|
l %r2,100(%r15)
|
|
l %r3,152(%r15)
|
|
ENTRY(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: st %r2,100(%r15)
|
|
#endif
|
|
ahi %r15,96
|
|
l %r14,56(%r15)
|
|
3: lm %r2,%r5,16(%r15)
|
|
br %r14
|
|
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
|
|
ENTRY(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
|