-/* copy no more then N bytes from SRC to DEST, returning the address of
+/* copy no more than N bytes from SRC to DEST, returning the address of
the terminating '\0' in DEST.
For Intel 80x86, x>=3.
- Copyright (C) 1994, 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1994-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>
Some bug fixes by Alan Modra <Alan@SPRI.Levels.UniSA.Edu.Au>
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. */
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include "asm-syntax.h"
-#include "bp-sym.h"
-#include "bp-asm.h"
-#define PARMS LINKAGE+4 /* space for 1 saved reg */
+#define PARMS 4+4 /* space for 1 saved reg */
#define RTN PARMS
-#define DEST RTN+RTN_SIZE
-#define SRC DEST+PTR_SIZE
-#define LEN SRC+PTR_SIZE
+#define DEST RTN
+#define SRC DEST+4
+#define LEN SRC+4
.text
-ENTRY (BP_SYM (__stpncpy))
- ENTER
+ENTRY (__stpncpy)
pushl %esi
+ cfi_adjust_cfa_offset (4)
movl DEST(%esp), %eax
movl SRC(%esp), %esi
+ cfi_rel_offset (esi, 0)
movl LEN(%esp), %ecx
- CHECK_BOUNDS_LOW (%eax, DEST(%esp))
- CHECK_BOUNDS_LOW (%esi, SRC(%esp))
subl %eax, %esi /* magic: reduce number of loop variants
to one using addressing mode */
ALIGN(4)
/* Four times unfolded loop with two loop counters. We get the
- the third value (the source address) by using the index+base
+ third value (the source address) by using the index+base
addressing mode. */
L(2): movb (%eax,%esi), %dl /* load current char */
movb %dl, (%eax) /* and store it */
L(3): decl %ecx /* all bytes written? */
jnz L(8) /* no, then again */
-L(9):
-#if __BOUNDED_POINTERS__
- addl %eax, %esi /* undo magic: %esi now points beyond end of SRC */
- CHECK_BOUNDS_HIGH (%esi, SRC(%esp), jbe)
- CHECK_BOUNDS_HIGH (%eax, DEST(%esp), jbe)
- RETURN_BOUNDED_POINTER (DEST(%esp))
-#endif
- popl %esi /* restore saved register content */
+L(9): popl %esi /* restore saved register content */
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (esi)
- LEAVE
- RET_PTR
-END (BP_SYM (__stpncpy))
+ ret
+END (__stpncpy)
-weak_alias (BP_SYM (__stpncpy), BP_SYM (stpncpy))
+libc_hidden_def (__stpncpy)
+weak_alias (__stpncpy, stpncpy)