sparc64: add ftrace support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/sparc64/lib/mcount.S b/arch/sparc64/lib/mcount.S
index 9e4534b..7735a7a 100644
--- a/arch/sparc64/lib/mcount.S
+++ b/arch/sparc64/lib/mcount.S
@@ -28,10 +28,13 @@
.skip OVSTACKSIZE
#endif
.text
- .align 32
- .globl mcount, _mcount
-mcount:
+ .align 32
+ .globl _mcount
+ .type _mcount,#function
+ .globl mcount
+ .type mcount,#function
_mcount:
+mcount:
#ifdef CONFIG_STACK_DEBUG
/*
* Check whether %sp is dangerously low.
@@ -55,6 +58,53 @@
or %g3, %lo(panicstring), %o0
call prom_halt
nop
+1:
#endif
-1: retl
+#ifdef CONFIG_FTRACE
+#ifdef CONFIG_DYNAMIC_FTRACE
+ mov %o7, %o0
+ .globl mcount_call
+mcount_call:
+ call ftrace_stub
+ mov %o0, %o7
+#else
+ sethi %hi(ftrace_trace_function), %g1
+ sethi %hi(ftrace_stub), %g2
+ ldx [%g1 + %lo(ftrace_trace_function)], %g1
+ or %g2, %lo(ftrace_stub), %g2
+ cmp %g1, %g2
+ be,pn %icc, 1f
+ mov %i7, %o1
+ jmpl %g1, %g0
+ mov %o7, %o0
+ /* not reached */
+1:
+#endif
+#endif
+ retl
nop
+ .size _mcount,.-_mcount
+ .size mcount,.-mcount
+
+#ifdef CONFIG_FTRACE
+ .globl ftrace_stub
+ .type ftrace_stub,#function
+ftrace_stub:
+ retl
+ nop
+ .size ftrace_stub,.-ftrace_stub
+#ifdef CONFIG_DYNAMIC_FTRACE
+ .globl ftrace_caller
+ .type ftrace_caller,#function
+ftrace_caller:
+ mov %i7, %o1
+ mov %o7, %o0
+ .globl ftrace_call
+ftrace_call:
+ call ftrace_stub
+ mov %o0, %o7
+ retl
+ nop
+ .size ftrace_caller,.-ftrace_caller
+#endif
+#endif