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/* Copyright (C) 1992, 1993, 1994 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>
#if defined(__i486__) || defined(i486)
#define ALIGN 4
#else
#define ALIGN 2
#endif
#ifdef __ELF__
#define SYMBOL_NAME(X) X
#define SYMBOL_NAME_LABEL(X) X##:
#else
#define SYMBOL_NAME(X) _##X
#define SYMBOL_NAME_LABEL(X) _##X##:
#endif
#ifdef __ELF__
#define ENTRY(name) \
.globl SYMBOL_NAME(name); \
.align ALIGN; \
SYMBOL_NAME_LABEL(name)
#else
#define ENTRY(name) \
.globl _##name##; \
.align ALIGN; \
SYMBOL_NAME_LABEL(name)
#endif
/* Use this for the different syntaxes for local assembler labels */
#ifdef __ELF__
#define L(X) .L##X
#define LF(X) .L##X
#define LL(X) .L##X##:
#else
#define L(X) X
#define LF(X) X##f
#define LL(X) X##:
#endif
#ifdef PTHREAD_KERNEL
#ifdef __SVR4_I386_ABI_L1__
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
movl $(SYS_##syscall_name), %eax; \
lcall $0x7,$0;
#else /* __SVR4_I386_ABI_L1__ */
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
pushl %ebp; \
movl %esp,%ebp; \
PUSH_##args \
movl $(SYS_##syscall_name), %eax; \
MOVE_##args \
int $0x80; \
POP_##args \
movl %ebp,%esp; \
popl %ebp;
#endif /* __SVR4_I386_ABI_L1__ */
#else /* PTHREAD_KERNEL */
/* In case of returning a memory address, negative values may not mean
error. */
#ifdef __CHECK_RETURN_ADDR
#define check_error cmpl $-4096,%edx; jbe
#else
#define check_error test %edx,%edx; jge
#endif
#define ERRNO_LOCATION SYMBOL_NAME(__errno_location)
#if defined(__PIC__) || defined (__pic__)
#ifdef __SVR4_I386_ABI_L1__
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
movl $(SYS_##syscall_name), %eax; \
lcall $0x7,$0; \
movl %eax,%edx; \
check_error L(Lexit); \
negl %edx; \
pushl %edx; \
call L(L4); \
LL(L4) \
popl %ebx; \
addl $_GLOBAL_OFFSET_TABLE_+[.-L(L4)],%ebx; \
call ERRNO_LOCATION@PLT; \
popl %edx; \
movl %edx,(%eax); \
movl $-1,%eax; \
LL(Lexit)
#else /* __SVR4_I386_ABI_L1__ */
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
pushl %ebp; \
movl %esp,%ebp; \
PUSH_##args \
movl $SYS_##syscall_name, %eax; \
MOVE_##args \
int $0x80; \
movl %eax,%edx; \
check_error L(Lexit); \
negl %edx; \
pushl %edx; \
call L(L4); \
LL(L4) \
popl %ebx; \
addl $_GLOBAL_OFFSET_TABLE_+[.-L(L4)],%ebx; \
call ERRNO_LOCATION@PLT; \
popl %edx; \
movl %edx,(%eax); \
movl $-1,%eax; \
LL(Lexit) \
POP_##args \
movl %ebp,%esp; \
popl %ebp;
#endif /* __SVR4_I386_ABI_L1__ */
#else /* PIC */
#ifdef __SVR4_I386_ABI_L1__
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
movl $(SYS_##syscall_name), %eax; \
lcall $0x7,$0; \
movl %eax,%edx; \
check_error L(Lexit); \
negl %edx; \
pushl %edx; \
call ERRNO_LOCATION; \
popl %edx; \
movl %edx,(%eax); \
movl $-1,%eax; \
LL(Lexit)
#else /* __SVR4_I386_ABI_L1__ */
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
pushl %ebp; \
movl %esp,%ebp; \
PUSH_##args \
movl $(SYS_##syscall_name), %eax; \
MOVE_##args \
int $0x80; \
movl %eax,%edx; \
check_error L(Lexit); \
negl %edx; \
pushl %edx; \
call ERRNO_LOCATION; \
popl %edx; \
movl %edx,(%eax); \
movl $-1,%eax; \
LL(Lexit) \
POP_##args \
movl %ebp,%esp; \
popl %ebp;
#endif /* __SVR4_I386_ABI_L1__ */
#endif /* PIC */
#endif /* PTHREAD_KERNEL */
/* Linux takes system call arguments in registers:
0: %eax This is the system call number.
1: %ebx This is the first argument.
2: %ecx
3: %edx
4: %esi
5: %edi
*/
#if defined(__PIC__) || defined (__pic__)
#define PUSH_0 pushl %ebx;
#else
#define PUSH_0 /* No arguments to push. */
#endif
#define PUSH_1 pushl %ebx;
#define PUSH_2 PUSH_1
#define PUSH_3 PUSH_1
#define PUSH_4 pushl %esi; PUSH_3
#define PUSH_5 pushl %edi; PUSH_4
#define MOVE_0 /* No arguments to move. */
#define MOVE_1 movl 8(%ebp),%ebx;
#define MOVE_2 MOVE_1 movl 12(%ebp),%ecx;
#define MOVE_3 MOVE_2 movl 16(%ebp),%edx;
#define MOVE_4 MOVE_3 movl 20(%ebp),%esi;
#define MOVE_5 MOVE_4 movl 24(%ebp),%edi;
#if defined(__PIC__) || defined (__pic__)
#define POP_0 popl %ebx;
#else
#define POP_0 /* No arguments to pop. */
#endif
#define POP_1 popl %ebx;
#define POP_2 POP_1
#define POP_3 POP_1
#define POP_4 POP_3 popl %esi;
#define POP_5 POP_4 popl %edi;
/* Linux doesn't use it. */
#if 0
#define r0 %eax
#define r1 %edx
#define MOVE(x,y) movl x , y
#endif
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