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authorEric Andersen <andersen@codepoet.org>2003-03-06 15:03:33 +0000
committerEric Andersen <andersen@codepoet.org>2003-03-06 15:03:33 +0000
commitf8a078764773263c596e67d3dd49a59423895c7c (patch)
tree58dccfc1459cc4c3318c8ce0e4bb39e8fd1c5eb0 /libc/sysdeps/linux
parent6f2da98c8c7c54e38ed8ba02a86b997d2046289c (diff)
Finish off gmon based profiling for powerpc
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/powerpc/Makefile13
-rw-r--r--libc/sysdeps/linux/powerpc/crt0.S11
-rw-r--r--libc/sysdeps/linux/powerpc/mcount.S100
3 files changed, 120 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index 9b79644e6..8e979a1e8 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -21,9 +21,13 @@ include $(TOPDIR)Rules.mak
ASFLAGS=$(CFLAGS)
CRT0_SRC = crt0.S
-CRT0_OBJ = crt0.o crt1.o
+CRT0_OBJ = crt0.o crt1.o gcrt1.o
+CRT0_DEPS=gmon-start.S
SSRC=__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S clone.S __uClibc_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
@@ -52,6 +56,13 @@ $(COBJS): %.o : %.c
$(CC) $(CFLAGS) -c $< -o $@
$(STRIPTOOL) -x -R .note -R .comment $*.o
+ifeq ($(strip $(UCLIBC_PROFILING)),y)
+SAFECFLAGS := $(subst -g,,$(CFLAGS))
+gmon-start.S: ../common/gmon-start.c
+ $(CC) $(SAFECFLAGS) -c $< -S -o $*.S
+gcrt1.o: $(CRT0_DEPS)
+endif
+
headers:
diff --git a/libc/sysdeps/linux/powerpc/crt0.S b/libc/sysdeps/linux/powerpc/crt0.S
index 47fe7e786..24110850d 100644
--- a/libc/sysdeps/linux/powerpc/crt0.S
+++ b/libc/sysdeps/linux/powerpc/crt0.S
@@ -68,14 +68,14 @@ _start:
add r5,r5,r4
/* Ok, now run uClibc's main() -- shouldn't return */
-#if defined L_crt0 || ! defined __UCLIBC_CTOR_DTOR__
- bl __uClibc_main
-#else
+#if (defined L_crt1 || defined L_gcrt1 ) && 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
addi r7,r7,_fini@l # load bottom 16 bits
bl __uClibc_start_main
+#else
+ bl __uClibc_main
#endif
.size _start,.-_start
@@ -83,3 +83,8 @@ _start:
.globl __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
new file mode 100644
index 000000000..a9e3677a1
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/mcount.S
@@ -0,0 +1,100 @@
+/* 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
+