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authorDavid S. Miller <davem@davemloft.net>2010-04-07 04:41:33 -0700
committerDavid S. Miller <davem@davemloft.net>2010-04-12 22:37:26 -0700
commit9960e9e8944f9b1ca6af5f7d26400ca45b429600 (patch)
tree2483b4c55f54663a8cc358fae5837e7d8232c554 /arch/sparc/lib
parenta71d1d6bb1b26e566e5c06c37857f4cdc1664780 (diff)
downloadlinux-linaro-9960e9e8944f9b1ca6af5f7d26400ca45b429600.tar.gz
sparc64: Add function graph tracer support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib')
-rw-r--r--arch/sparc/lib/mcount.S62
1 files changed, 56 insertions, 6 deletions
diff --git a/arch/sparc/lib/mcount.S b/arch/sparc/lib/mcount.S
index 153c80e62cf..3753e3c6e17 100644
--- a/arch/sparc/lib/mcount.S
+++ b/arch/sparc/lib/mcount.S
@@ -26,22 +26,42 @@ mcount:
#else
sethi %hi(function_trace_stop), %g1
lduw [%g1 + %lo(function_trace_stop)], %g2
- brnz,pn %g2, 1f
+ brnz,pn %g2, 2f
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, %g2
+ mov %i7, %g3
save %sp, -128, %sp
- mov %g2, %o1
+ mov %g3, %o1
jmpl %g1, %o7
mov %i7, %o0
ret
restore
/* not reached */
1:
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ sethi %hi(ftrace_graph_return), %g1
+ ldx [%g1 + %lo(ftrace_graph_return)], %g3
+ cmp %g2, %g3
+ bne,pn %xcc, 5f
+ sethi %hi(ftrace_graph_entry_stub), %g2
+ sethi %hi(ftrace_graph_entry), %g1
+ or %g2, %lo(ftrace_graph_entry_stub), %g2
+ ldx [%g1 + %lo(ftrace_graph_entry)], %g1
+ cmp %g1, %g2
+ be,pt %xcc, 2f
+ nop
+5: mov %i7, %g2
+ mov %fp, %g3
+ save %sp, -128, %sp
+ mov %g2, %l0
+ ba,pt %xcc, ftrace_graph_caller
+ mov %g3, %l1
+#endif
+2:
#endif
#endif
retl
@@ -62,18 +82,48 @@ ftrace_stub:
ftrace_caller:
sethi %hi(function_trace_stop), %g1
mov %i7, %g2
- lduw [%g1 + %lo(function_trace_stop)], %g3
- brnz,pn %g3, ftrace_stub
- nop
+ lduw [%g1 + %lo(function_trace_stop)], %g1
+ brnz,pn %g1, ftrace_stub
+ mov %fp, %g3
save %sp, -128, %sp
mov %g2, %o1
+ mov %g2, %l0
+ mov %g3, %l1
.globl ftrace_call
ftrace_call:
call ftrace_stub
mov %i7, %o0
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ .globl ftrace_graph_call
+ftrace_graph_call:
+ call ftrace_stub
+ nop
+#endif
ret
restore
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ .size ftrace_graph_call,.-ftrace_graph_call
+#endif
.size ftrace_call,.-ftrace_call
.size ftrace_caller,.-ftrace_caller
#endif
#endif
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ENTRY(ftrace_graph_caller)
+ mov %l0, %o0
+ mov %i7, %o1
+ call prepare_ftrace_return
+ mov %l1, %o2
+ ret
+ restore %o0, -8, %i7
+END(ftrace_graph_caller)
+
+ENTRY(return_to_handler)
+ save %sp, -128, %sp
+ call ftrace_return_to_handler
+ mov %fp, %o0
+ jmpl %o0 + 8, %g0
+ restore
+END(return_to_handler)
+#endif