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authorIngo Molnar <mingo@elte.hu>2012-02-07 08:59:29 (GMT)
committerIngo Molnar <mingo@elte.hu>2012-02-07 08:59:29 (GMT)
commit290436c9c61ac983b1bd425da67242a4357c7701 (patch)
tree35e1f189b62eb50515600ad607d7fb57fc547870 /arch/arm/kernel/entry-common.S
parent623ec991ce0e8cd5791bad656c162fa837635907 (diff)
parent62aa2b537c6f5957afd98e29f96897419ed5ebab (diff)
downloadlinux-fsl-qoriq-290436c9c61ac983b1bd425da67242a4357c7701.tar.xz
Merge tag 'v3.3-rc2' into perf/core
Linux 3.3-rc2 Pick up the latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm/kernel/entry-common.S')
-rw-r--r--arch/arm/kernel/entry-common.S15
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 520889c..9fd0ba9 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -149,6 +149,11 @@ ENDPROC(ret_from_fork)
#endif
#endif
+.macro mcount_adjust_addr rd, rn
+ bic \rd, \rn, #1 @ clear the Thumb bit if present
+ sub \rd, \rd, #MCOUNT_INSN_SIZE
+.endm
+
.macro __mcount suffix
mcount_enter
ldr r0, =ftrace_trace_function
@@ -173,8 +178,7 @@ ENDPROC(ret_from_fork)
mcount_exit
1: mcount_get_lr r1 @ lr of instrumented func
- mov r0, lr @ instrumented function
- sub r0, r0, #MCOUNT_INSN_SIZE
+ mcount_adjust_addr r0, lr @ instrumented function
adr lr, BSYM(2f)
mov pc, r2
2: mcount_exit
@@ -184,8 +188,7 @@ ENDPROC(ret_from_fork)
mcount_enter
mcount_get_lr r1 @ lr of instrumented func
- mov r0, lr @ instrumented function
- sub r0, r0, #MCOUNT_INSN_SIZE
+ mcount_adjust_addr r0, lr @ instrumented function
.globl ftrace_call\suffix
ftrace_call\suffix:
@@ -205,11 +208,11 @@ ftrace_graph_call\suffix:
#ifdef CONFIG_DYNAMIC_FTRACE
@ called from __ftrace_caller, saved in mcount_enter
ldr r1, [sp, #16] @ instrumented routine (func)
+ mcount_adjust_addr r1, r1
#else
@ called from __mcount, untouched in lr
- mov r1, lr @ instrumented routine (func)
+ mcount_adjust_addr r1, lr @ instrumented routine (func)
#endif
- sub r1, r1, #MCOUNT_INSN_SIZE
mov r2, fp @ frame pointer
bl prepare_ftrace_return
mcount_exit