[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / i386 / sysdep.S

/* Copyright (C) 1995, 1996, 1997 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdep.h>

/* Because the Linux version is in fact i386/ELF and the start.? file
   for this system (sysdeps/i386/elf/start.S) is also used by The Hurd
   and therefore this files must not contain the definition of the
   `errno' variable (I don't know why, ask Roland), we have to define
   it somewhere else.

   ...and this place is here.  */
	.bss
	.globl errno
	.type errno,@object
	.size errno,4
errno:	.zero 4
	.globl _errno
	.type _errno,@object
_errno = errno	/* This name is expected by hj's libc.so.5 startup code.  */
	.text

/* The following code is only used in the shared library when we
   compile the reentrant version.  Otherwise each system call defines
   each own version.  */

#ifndef PIC

/* The syscall stubs jump here when they detect an error.
   The code for Linux is almost identical to the canonical Unix/i386
   code, except that the error number in %eax is negated.  */

#undef CALL_MCOUNT
#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %eax.  */

ENTRY (__syscall_error)
	negl %eax

#define __syscall_error __syscall_error_1
#include <sysdeps/unix/i386/sysdep.S>

#endif	/* !PIC */
Commit	Line	Data
5ae9d168	1	/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
b5791037	2	This file is part of the GNU C Library.
28f540f4	3
b5791037 UD	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
28f540f4	8
b5791037 UD	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Library General Public License for more details.
28f540f4	13
b5791037 UD	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If not,
	16	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	17	Boston, MA 02111-1307, USA. */
28f540f4	18
ec4b0518 UD	19	#include <sysdep.h>
ec4b0518 UD	20
d2f5be2a UD	21	/* Because the Linux version is in fact i386/ELF and the start.? file
	22	for this system (sysdeps/i386/elf/start.S) is also used by The Hurd
	23	and therefore this files must not contain the definition of the
	24	`errno' variable (I don't know why, ask Roland), we have to define
	25	it somewhere else.
	26
cabcc273	27	...and this place is here. */
bfc04a9f RM	28	.bss
	29	.globl errno
	30	.type errno,@object
	31	.size errno,4
edf5b2d7	32	errno: .zero 4
bfc04a9f RM	33	.globl _errno
bfc04a9f RM	34	.type _errno,@object
ba1ffaa1	35	_errno = errno /* This name is expected by hj's libc.so.5 startup code. */
bfc04a9f	36	.text
03a75825	37
edf5b2d7 UD	38	/* The following code is only used in the shared library when we
	39	compile the reentrant version. Otherwise each system call defines
	40	each own version. */
03a75825	41
edf5b2d7	42	#ifndef PIC
03a75825 RM	43
	44	/* The syscall stubs jump here when they detect an error.
	45	The code for Linux is almost identical to the canonical Unix/i386
	46	code, except that the error number in %eax is negated. */
	47
5ae9d168 UD	48	#undef CALL_MCOUNT
	49	#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %eax. */
	50
ec4b0518	51	ENTRY (__syscall_error)
03a75825 RM	52	negl %eax
	53
	54	#define __syscall_error __syscall_error_1
	55	#include <sysdeps/unix/i386/sysdep.S>
	56
edf5b2d7	57	#endif /* !PIC */