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/* Copyright (C) 1992 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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sysdeps/linux/sysdep.h>
#ifdef __ELF__
#define SYMBOL_NAME(X) X
#define SYMBOL_NAME_LABEL(X) X##:
#define ALIGN 4
#else
#define SYMBOL_NAME(X) _##X
#define SYMBOL_NAME_LABEL(X) _##X##:
#define ALIGN 2
#endif
#define ENTRY(name) \
.globl SYMBOL_NAME(name); \
.align ALIGN; \
SYMBOL_NAME_LABEL(name)
#define _HASH #
#ifdef PTHREAD_KERNEL
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
PUSH_##args \
movel _HASH SYS_##syscall_name,%d0; \
MOVE_##args \
trap _HASH 0; \
POP_##args
#else /* PTHREAD_KERNEL */
/* In case of returning a memory address, negative values may not mean
error. Moreover, we have to copy the return value to register %a0,
as those syscalls are normally declared to return a pointer. */
#ifdef __CHECK_RETURN_ADDR
#define check_error(LAB) cmp.l _HASH -4096, %d0; jls LAB
#define copy_ret move.l %d0, %a0
#else
#define check_error(LAB) tst.l %d0; jpl LAB
#define copy_ret /* empty */
#endif
#define ERRNO_LOCATION SYMBOL_NAME(__errno_location)
#if defined(__PIC__) || defined (__pic__)
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
PUSH_##args \
movel _HASH SYS_##syscall_name,%d0; \
MOVE_##args \
trap _HASH 0; \
check_error(1f); \
negl %d0; \
movel %d0,%sp@-; \
bsrl ERRNO_LOCATION@PLTPC; \
movel %sp@+,%a0@; \
moveq _HASH -1,%d0; \
1: copy_ret; \
POP_##args
#else /* PIC */
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
PUSH_##args \
movel _HASH SYS_##syscall_name,%d0; \
MOVE_##args \
trap _HASH 0; \
check_error(1f); \
negl %d0; \
movel %d0,%sp@-; \
jbsr ERRNO_LOCATION; \
movel %sp@+,%a0@; \
moveq _HASH -1,%d0; \
1: copy_ret; \
POP_##args
#endif /* PIC */
#endif /* PTHREAD_KERNEL */
/* Linux takes system call arguments in registers:
1: d1
2: d2
3: d3
4: d4
5: d5
*/
/* We don't need the GOT any more. */
#if 0 && (defined (__PIC__) || defined (__pic__))
#define PUSH_0 movel a5,sp@-;
#define PUSH_1 PUSH_0 /* no need to restore d1 */
#define PUSH_2 movel a5,sp@-; movel d2,sp@-;
#define PUSH_3 movml d2-d3/a5,sp@-;
#define PUSH_4 movml d2-d4/a5,sp@-;
#define PUSH_5 movml d2-d5/a5,sp@-;
#define MOVE_0 /* No arguments to move. */
#define MOVE_1 movl sp@(8),d1;
#define MOVE_2 movml sp@(12),d1-d2;
#define MOVE_3 movml sp@(16),d1-d3;
#define MOVE_4 movml sp@(20),d1-d4;
#define MOVE_5 movml sp@(24),d1-d5;
#define POP_0 movel sp@+,a5;
#define POP_1 POP_0
#define POP_2 movel sp@+,d2; movel sp@+,a5;
#define POP_3 movml sp@+,d2-d3/a5;
#define POP_4 movml sp@+,d2-d4/a5;
#define POP_5 movml sp@+,d2-d5/a5;
#else
#define PUSH_0 /* No arguments to push. */
#define PUSH_1 /* no need to restore d1 */
#define PUSH_2 movel %d2,%sp@-;
#define PUSH_3 movml %d2-%d3,%sp@-;
#define PUSH_4 movml %d2-%d4,%sp@-;
#define PUSH_5 movml %d2-%d5,%sp@-;
#define MOVE_0 /* No arguments to move. */
#define MOVE_1 movl %sp@(4),%d1;
#define MOVE_2 movml %sp@(8),%d1-%d2;
#define MOVE_3 movml %sp@(12),%d1-%d3;
#define MOVE_4 movml %sp@(16),%d1-%d4;
#define MOVE_5 movml %sp@(20),%d1-%d5;
#define POP_0 /* No arguments to pop. */
#define POP_1 /* didn't save d1 */
#define POP_2 movel %sp@+,%d2;
#define POP_3 movml %sp@+,%d2-%d3;
#define POP_4 movml %sp@+,%d2-%d4;
#define POP_5 movml %sp@+,%d2-%d5;
#endif
#define ret rts
/* Linux doesn't use it. */
#if 0
#define r0 d0
#define r1 d1
#define MOVE(x,y) movel x , y
#endif
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