This commit adds profiling support for powerpc64. Now we can do application

profiling and kernel profiling. To enable kernel profiling one has to build
kgmon(8). I will enable the build once I managed to build and test powerpc
(32-bit) kernels with profiling support.

- add a powerpc64 PROF_PROLOGUE for _mcount.
- add macros to avoid adding the PROF_PROLOGUE in certain assembly entries.
- apply these macros where needed.
- add size information to the MCOUNT function.

MFC after:	3 weeks, together with r230291

3 files changed, 8 insertions, 7 deletions

diff --git a/sys/powerpc/aim/locore64.S b/sys/powerpc/aim/locore64.S
index 64e4e62..83d9048 100644
--- a/sys/powerpc/aim/locore64.S
+++ b/sys/powerpc/aim/locore64.S
@@ -115,7 +115,7 @@ kernel_text:
  * segment!
  */
 	.text
-ASENTRY(__start)
+ASENTRY_NOPROF(__start)
 	li	8,0
 	li	9,0x100
 	mtctr	9
@@ -202,7 +202,7 @@ tocbase:
  * or the (currently used) C code optimized, so it doesn't use any non-volatile
  * registers.
  */
-ASENTRY(setfault)
+ASENTRY_NOPROF(setfault)
 	mflr	0
 	mfcr	12
 	mfsprg	4,0
diff --git a/sys/powerpc/aim/swtch64.S b/sys/powerpc/aim/swtch64.S
index c5cdcbc..489ec40 100644
--- a/sys/powerpc/aim/swtch64.S
+++ b/sys/powerpc/aim/swtch64.S
@@ -68,7 +68,7 @@
 /*
  * void cpu_throw(struct thread *old, struct thread *new)
  */
-ENTRY(cpu_throw)
+ENTRY_NOPROF(cpu_throw)
 	mr	%r13, %r4
 	b	cpu_switchin
 
@@ -79,7 +79,7 @@ ENTRY(cpu_throw)
  *
  * Switch to a new thread saving the current state in the old thread.
  */
-ENTRY(cpu_switch)
+ENTRY_NOPROF(cpu_switch)
 	ld	%r6,TD_PCB(%r3)		/* Get the old thread's PCB ptr */
 	std	%r12,PCB_CONTEXT(%r6)	/* Save the non-volatile GP regs.
 					   These can now be used for scratch */
@@ -237,7 +237,7 @@ blocked_loop:
  * savectx(pcb)
  * Update pcb, saving current processor state
  */
-ENTRY(savectx)
+ENTRY_NOPROF(savectx)
 	std	%r12,PCB_CONTEXT(%r3)	/* Save the non-volatile GP regs. */
 	std	%r13,PCB_CONTEXT+1*8(%r3)	
 	std	%r14,PCB_CONTEXT+2*8(%r3)	
@@ -268,7 +268,8 @@ ENTRY(savectx)
  * fork_trampoline()
  * Set up the return from cpu_fork()
  */
-ENTRY(fork_trampoline)
+
+ENTRY_NOPROF(fork_trampoline)
 	ld	%r3,CF_FUNC(%r1)
 	ld	%r4,CF_ARG0(%r1)
 	ld	%r5,CF_ARG1(%r1)
diff --git a/sys/powerpc/aim/trap_subr64.S b/sys/powerpc/aim/trap_subr64.S
index 82935e7..8243dc7 100644
--- a/sys/powerpc/aim/trap_subr64.S
+++ b/sys/powerpc/aim/trap_subr64.S
@@ -703,7 +703,7 @@ CNAME(asttrapexit):
 /*
  * Deliberate entry to dbtrap
  */
-ASENTRY(breakpoint)
+ASENTRY_NOPROF(breakpoint)
 	mtsprg1	%r1
 	mfmsr	%r3
 	mtsrr1	%r3