Kill off all support for 'gcc -pg' / 'gprof' style profiling. There is both a

size and performance penalty to profiling applications this way, as well as
Heisenberg effects, where the act of measuring changes what is measured.
There are better tools for doing profiling, such as OProfile, that do not
require gcc to instrument the application code.
 -Erik

4 files changed, 2 insertions, 146 deletions

diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index 5365e3f38..93f447137 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -21,15 +21,12 @@ include $(TOPDIR)Rules.mak
 ASFLAGS=$(CFLAGS)
 
 CRT0_SRC = crt0.S
-CRT0_OBJ = crt0.o crt1.o gcrt1.o
+CRT0_OBJ = crt0.o crt1.o
 CRT0_DEPS=gmon-start.S
 CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
 
 SSRC=__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S \
 	clone.S __uClibc_syscall.S syscall.S
-ifeq ($(strip $(UCLIBC_PROFILING)),y)
-SSRC+=mcount.S
-endif
 SOBJS=$(patsubst %.S,%.o, $(SSRC))
 
 CSRC=mmap.c vfork.c __syscall_error.c pread_write.c ioctl.c
@@ -57,12 +54,6 @@ $(COBJS): %.o : %.c
 	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
-ifeq ($(strip $(UCLIBC_PROFILING)),y)
-gmon-start.S: ../common/gmon-start.c
-	$(CC) $(CFLAGS) -c $< -S -o $*.S
-gcrt1.o: $(CRT0_DEPS)
-endif
-
 
 ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
 crti.o: crti.S
diff --git a/libc/sysdeps/linux/powerpc/bits/machine-gmon.h b/libc/sysdeps/linux/powerpc/bits/machine-gmon.h
deleted file mode 100644
index b0f3d8130..000000000
--- a/libc/sysdeps/linux/powerpc/bits/machine-gmon.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/* PowerPC-specific implementation of profiling support.
-   Copyright (C) 1997 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-/* We need a special version of the `mcount' function because it has
-   to preserve more registers than your usual function.  */
-
-void __mcount_internal (unsigned long frompc, unsigned long selfpc);
-
-#define _MCOUNT_DECL(frompc, selfpc) \
-void __mcount_internal (unsigned long frompc, unsigned long selfpc)
-
-
-/* Define MCOUNT as empty since we have the implementation in another
-   file.  */
-#define MCOUNT
diff --git a/libc/sysdeps/linux/powerpc/crt0.S b/libc/sysdeps/linux/powerpc/crt0.S
index c3b903e1e..114ffa093 100644
--- a/libc/sysdeps/linux/powerpc/crt0.S
+++ b/libc/sysdeps/linux/powerpc/crt0.S
@@ -68,7 +68,7 @@ _start:
 	add	r5,r5,r4
 
 	/* Ok, now run uClibc's main() -- shouldn't return */
-#if (defined L_crt1 || defined L_gcrt1 ) && defined __UCLIBC_CTOR_DTOR__
+#if (defined L_crt1) && defined __UCLIBC_CTOR_DTOR__
 	lis     r6,_init@ha	# load top 16 bits
 	addi    r6,r6,_init@l	# load bottom 16 bits
 	lis     r7,_fini@ha	# load top 16 bits of &msg
@@ -87,7 +87,3 @@ __data_start:
 	.weak data_start
 	data_start = __data_start
 
-#if defined L_gcrt1 && defined __UCLIBC_PROFILING__
-# include "./gmon-start.S"
-#endif
-
diff --git a/libc/sysdeps/linux/powerpc/mcount.S b/libc/sysdeps/linux/powerpc/mcount.S
deleted file mode 100644
index 303a0dd53..000000000
--- a/libc/sysdeps/linux/powerpc/mcount.S
+++ /dev/null
@@ -1,100 +0,0 @@
-/* PowerPC-specific implementation of profiling support.
-   Copyright (C) 1997, 1999 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <features.h>
-#include "ppc_asm.h"
-
-/* This would be bad.  */
-#ifdef PROF
-#undef PROF
-#endif
-
-
-/* We do profiling as described in the SYSV ELF ABI, _mcount is called
-   with the address of a data word in r0 (that is different for every
-   routine, initialised to 0, and otherwise unused).  The caller has put
-   the address the caller will return to in the usual place on the stack,
-   4(r1).  _mcount is responsible for ensuring that when it returns no
-   argument-passing registers are disturbed, and that the LR is set back
-   to (what the caller sees as) 4(r1).
-
-   This is intended so that the following code can be inserted at the
-   front of any routine without changing the routine:
-
-	.data
-	.align	2
-   0:	.long	0
-	.previous
-	mflr	r0
-	lis	r11,0b@ha
-	stw	r0,4(r1)
-	addi	r0,r11,0b@l
-	bl	_mcount
-*/
-
-
-.globl      _mcount;
-.type      _mcount, @function;
-.align  2;
-
-_mcount:
-	stwu	r1,-48(r1)
-/* We need to save the parameter-passing registers.  */
-	stw	r3, 12(r1)
-	stw	r4, 16(r1)
-	stw	r5, 20(r1)
-	stw	r6, 24(r1)
-	mflr	r4
-	lwz	r3, 52(r1)
-	mfcr	r5
-	stw	r7, 28(r1)
-	stw	r8, 32(r1)
-	stw	r9, 36(r1)
-	stw	r10,40(r1)
-	stw	r4, 44(r1)
-	stw	r5,  8(r1)
-#ifdef __PIC__
-	bl	__mcount_internal@plt
-#else
-	bl	__mcount_internal
-#endif
-	nop
- /* Restore the registers...  */
-	lwz     r6,  8(r1)
-	lwz	r0, 44(r1)
-	lwz	r3, 12(r1)
-	mtctr	r0
-	lwz	r4, 16(r1)
-	mtcrf	0xff,r6
-	lwz	r5, 20(r1)
-	lwz	r6, 24(r1)
-	lwz	r0, 52(r1)
-	lwz	r7, 28(r1)
-	lwz	r8, 32(r1)
-	mtlr	r0
-	lwz	r9, 36(r1)
-	lwz	r10,40(r1)
- /* ...unwind the stack frame, and return to your usual programming.  */
-	addi	r1,r1,48
-	bctr
-	.size _mcount,.-_mcount;
-
-#undef mcount
-.weak mcount ; mcount = _mcount
-