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-rw-r--r--arch/blackfin/kernel/ftrace-entry.S23
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/blackfin/kernel/ftrace-entry.S b/arch/blackfin/kernel/ftrace-entry.S
index 6980b7a..76dd4fb 100644
--- a/arch/blackfin/kernel/ftrace-entry.S
+++ b/arch/blackfin/kernel/ftrace-entry.S
@@ -17,8 +17,8 @@
* only one we can blow away. With pointer registers, we have P0-P2.
*
* Upon entry, the RETS will point to the top of the current profiled
- * function. And since GCC setup the frame for us, the previous function
- * will be waiting there. mmmm pie.
+ * function. And since GCC pushed the previous RETS for us, the previous
+ * function will be waiting there. mmmm pie.
*/
ENTRY(__mcount)
/* save third function arg early so we can do testing below */
@@ -70,14 +70,14 @@ ENTRY(__mcount)
/* setup the tracer function */
p0 = r3;
- /* tracer(ulong frompc, ulong selfpc):
- * frompc: the pc that did the call to ...
- * selfpc: ... this location
- * the selfpc itself will need adjusting for the mcount call
+ /* function_trace_call(unsigned long ip, unsigned long parent_ip):
+ * ip: this point was called by ...
+ * parent_ip: ... this function
+ * the ip itself will need adjusting for the mcount call
*/
- r1 = rets;
- r0 = [fp + 4];
- r1 += -MCOUNT_INSN_SIZE;
+ r0 = rets;
+ r1 = [sp + 16]; /* skip the 4 local regs on stack */
+ r0 += -MCOUNT_INSN_SIZE;
/* call the tracer */
call (p0);
@@ -106,9 +106,10 @@ ENTRY(_ftrace_graph_caller)
[--sp] = r1;
[--sp] = rets;
- r0 = fp;
+ /* prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) */
+ r0 = sp;
r1 = rets;
- r0 += 4;
+ r0 += 16; /* skip the 4 local regs on stack */
r1 += -MCOUNT_INSN_SIZE;
call _prepare_ftrace_return;
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