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

3 files changed, 2 insertions, 80 deletions

diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index f2582e1a8..6a80686a7 100644
--- a/libc/sysdeps/linux/arm/Makefile
+++ b/libc/sysdeps/linux/arm/Makefile
@@ -21,7 +21,7 @@ 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
 
@@ -54,12 +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
 	$(CC) $(CFLAGS) -c crti.S -o crti.o
diff --git a/libc/sysdeps/linux/arm/bits/machine-gmon.h b/libc/sysdeps/linux/arm/bits/machine-gmon.h
deleted file mode 100644
index 039dfd951..000000000
--- a/libc/sysdeps/linux/arm/bits/machine-gmon.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/* Machine-dependent definitions for profiling support.  ARM version.
-   Copyright (C) 1996, 1997, 1998 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.  */
-
-/* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0, 
-   so we must use an assembly stub.  */
-
-#include <sysdep.h>
-#ifndef NO_UNDERSCORES
-/* The asm symbols for C functions are `_function'.
-   The canonical name for the counter function is `mcount', no _.  */
-void _mcount (void) asm ("mcount");
-#else
-/* The canonical name for the function is `_mcount' in both C and asm,
-   but some old asm code might assume it's `mcount'.  */
-void _mcount (void);
-weak_alias (_mcount, mcount)
-#endif
-
-static void mcount_internal (u_long frompc, u_long selfpc);
-
-#define _MCOUNT_DECL(frompc, selfpc) \
-static void mcount_internal (u_long frompc, u_long selfpc)
-
-/* This macro/func MUST save r0, r1 because the compiler inserts
-	blind calls to _mount(), ignoring the fact that _mcount may
-	clobber registers; therefore, _mcount may NOT clobber registers */
-/* if (this_fp!=0) {
-	r0 = this_fp
-	r1 = this_lr
-  	r1 = [r1-4] which is caller's lr 
-	if (r1!=0) 
-		r1 = caller's lr
-	call mcount_internal(this_lr, caller's_lr)
-   }
-*/
-
-#define MCOUNT								\
-void _mcount (void)							\
-{									\
-  __asm__("stmdb	sp!, {r0, r1, r2, r3};"				\
-	  "movs		fp, fp;"				      	\
-          "moveq	r1, #0;"					\
-	  "ldrne	r1, [fp, $-4];"					\
-	  "ldrne	r0, [fp, $-12];"				\
-	  "movnes	r0, r0;"					\
-	  "ldrne	r0, [r0, $-4];"					\
-	  "movs		r0, r0;"					\
-	  "blne		mcount_internal;"				\
-	  "ldmia	sp!, {r0, r1, r2, r3}");			\
-}
-
diff --git a/libc/sysdeps/linux/arm/crt0.S b/libc/sysdeps/linux/arm/crt0.S
index 6704a81e2..455d35d2d 100644
--- a/libc/sysdeps/linux/arm/crt0.S
+++ b/libc/sysdeps/linux/arm/crt0.S
@@ -92,7 +92,7 @@ _start:
 	ldr r2,[sp, #8]
 #endif
 
-#if (defined L_crt1 || defined L_gcrt1 ) && defined __UCLIBC_CTOR_DTOR__
+#if (defined L_crt1 ) && defined __UCLIBC_CTOR_DTOR__
 	/* Store the address of _init in r3 as an argument to main() */
 	ldr r3, =_init
 
@@ -123,11 +123,6 @@ _start:
 	.long 2,0,0
 3:	.align 4
 
-#if defined L_gcrt1 && defined __UCLIBC_PROFILING__
-# include "./gmon-start.S"
-#endif
-
-
 /* Define a symbol for the first piece of initialized data.  */
 	.data
 	.globl __data_start