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-rw-r--r--sysdeps/i386/i586/strchr.S35
1 files changed, 25 insertions, 10 deletions
diff --git a/sysdeps/i386/i586/strchr.S b/sysdeps/i386/i586/strchr.S
index 9df504d335..136b19a3f3 100644
--- a/sysdeps/i386/i586/strchr.S
+++ b/sysdeps/i386/i586/strchr.S
@@ -1,6 +1,6 @@
/* Find character CH in a NUL terminated string.
Highly optimized version for ix85, x>=5.
- Copyright (C) 1995, 1996, 1997, 2000, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1995,1996,1997,2000,2003,2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
@@ -47,16 +47,21 @@ ENTRY (BP_SYM (strchr))
ENTER
pushl %edi /* Save callee-safe registers. */
+ cfi_adjust_cfa_offset (-4)
pushl %esi
+ cfi_adjust_cfa_offset (-4)
pushl %ebx
+ cfi_adjust_cfa_offset (-4)
pushl %ebp
+ cfi_adjust_cfa_offset (-4)
movl STR(%esp), %eax
movl CHR(%esp), %edx
CHECK_BOUNDS_LOW (%eax, STR(%esp))
movl %eax, %edi /* duplicate string pointer for later */
+ cfi_rel_offset (edi, 12)
xorl %ecx, %ecx /* clear %ecx */
/* At the moment %edx contains C. What we need for the
@@ -107,6 +112,10 @@ L(0): movb (%eax), %cl /* load single byte */
incl %eax /* increment pointer */
+ cfi_rel_offset (esi, 8)
+ cfi_rel_offset (ebx, 4)
+ cfi_rel_offset (ebp, 0)
+
/* The following code is the preparation for the loop. The
four instruction up to `L1' will not be executed in the loop
because the same code is found at the end of the loop, but
@@ -283,15 +292,28 @@ L(5): subl $4, %eax /* adjust pointer */
L(2): CHECK_BOUNDS_HIGH (%eax, STR(%esp), jb)
RETURN_BOUNDED_POINTER (STR(%esp))
- popl %ebp /* restore saved registers */
+L(out): popl %ebp /* restore saved registers */
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (ebp)
popl %ebx
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (ebx)
popl %esi
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (esi)
popl %edi
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (edi)
LEAVE
RET_PTR
+ cfi_adjust_cfa_offset (16)
+ cfi_rel_offset (edi, 12)
+ cfi_rel_offset (esi, 8)
+ cfi_rel_offset (ebx, 4)
+ cfi_rel_offset (ebp, 0)
/* We know there is a NUL byte in the word. But we have to test
whether there is an C byte before it in the word. */
L(4): subl $4, %eax /* adjust pointer */
@@ -327,14 +349,7 @@ L(4): subl $4, %eax /* adjust pointer */
L(3): xorl %eax, %eax
RETURN_NULL_BOUNDED_POINTER
- popl %ebp /* restore saved registers */
- popl %ebx
-
- popl %esi
- popl %edi
-
- LEAVE
- RET_PTR
+ jmp L(out)
END (BP_SYM (strchr))
#undef index