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PATCH: Add sysdeps/i386/i686/bcopy.S
- From: "H.J. Lu" <hongjiu dot lu at intel dot com>
- To: GNU C Library <libc-alpha at sourceware dot org>
- Date: Wed, 30 Dec 2009 15:12:43 -0800
- Subject: PATCH: Add sysdeps/i386/i686/bcopy.S
- Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>
Hi,
This patch adds sysdeps/i386/i686/bcopy.S.
H.J.
---
2009-12-30 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/i386/i686/bcopy.S: New.
* sysdeps/i386/i686/memmove.S: Support USE_AS_BCOPY.
diff --git a/sysdeps/i386/i686/bcopy.S b/sysdeps/i386/i686/bcopy.S
new file mode 100644
index 0000000..15ef941
--- /dev/null
+++ b/sysdeps/i386/i686/bcopy.S
@@ -0,0 +1,3 @@
+#define USE_AS_BCOPY
+#define memmove bcopy
+#include <sysdeps/i386/i686/memmove.S>
diff --git a/sysdeps/i386/i686/memmove.S b/sysdeps/i386/i686/memmove.S
index b93b5c7..62d208c 100644
--- a/sysdeps/i386/i686/memmove.S
+++ b/sysdeps/i386/i686/memmove.S
@@ -26,18 +26,27 @@
#define PARMS LINKAGE+4 /* one spilled register */
#define RTN PARMS
-#define DEST RTN+RTN_SIZE
-#define SRC DEST+PTR_SIZE
-#define LEN SRC+PTR_SIZE
.text
-#if defined PIC && !defined NOT_IN_libc
+
+#ifdef USE_AS_BCOPY
+# define SRC RTN+RTN_SIZE
+# define DEST SRC+PTR_SIZE
+# define LEN DEST+PTR_SIZE
+#else
+# define DEST RTN+RTN_SIZE
+# define SRC DEST+PTR_SIZE
+# define LEN SRC+PTR_SIZE
+
+# if defined PIC && !defined NOT_IN_libc
ENTRY (__memmove_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memmove_chk)
+# endif
#endif
+
ENTRY (BP_SYM (memmove))
ENTER
@@ -69,8 +78,10 @@ ENTRY (BP_SYM (memmove))
movsl
movl %edx, %esi
cfi_restore (esi)
+#ifndef USE_AS_BCOPY
movl DEST(%esp), %eax
RETURN_BOUNDED_POINTER (DEST(%esp))
+#endif
popl %edi
cfi_adjust_cfa_offset (-4)
@@ -101,8 +112,10 @@ ENTRY (BP_SYM (memmove))
movsl
movl %edx, %esi
cfi_restore (esi)
+#ifndef USE_AS_BCOPY
movl DEST(%esp), %eax
RETURN_BOUNDED_POINTER (DEST(%esp))
+#endif
cld
popl %edi
@@ -112,4 +125,6 @@ ENTRY (BP_SYM (memmove))
LEAVE
RET_PTR
END (BP_SYM (memmove))
+#ifndef USE_AS_BCOPY
libc_hidden_builtin_def (memmove)
+#endif