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- /* Copyright (C) 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. */
-
- /* 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
- */
-
- #define PUSH_0 /* No arguments to push. */
- #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
-
- #if defined(__PIC__) || defined (__pic__)
- #define MOVE_0 movl 8(%esp),%eax;
- #define MOVE_1 movl 12(%esp),%eax; movl 16(%esp),%ebx;
- #define MOVE_2 MOVE_1 movl 20(%esp),%ecx;
- #define MOVE_3 MOVE_2 movl 24(%esp),%edx;
- #define MOVE_4 movl 16(%esp),%eax; movl 20(%esp),%ebx; \
- movl 24(%esp),%ecx; movl 28(%esp),%edx; \
- movl 32(%esp),%esi;
- #define MOVE_5 movl 20(%esp),%eax; movl 24(%esp),%ebx; \
- movl 28(%esp),%ecx; movl 32(%esp),%edx; \
- movl 36(%esp),%esi; movl 40(%esp),%edi;
-
- #else
-
- #define MOVE_0 movl 4(%esp),%eax;
- #define MOVE_1 movl 8(%esp),%eax; movl 12(%esp),%ebx;
- #define MOVE_2 MOVE_1 movl 16(%esp),%ecx;
- #define MOVE_3 MOVE_2 movl 20(%esp),%edx;
- #define MOVE_4 movl 12(%esp),%eax; movl 16(%esp),%ebx; \
- movl 20(%esp),%ecx; movl 24(%esp),%edx; \
- movl 28(%esp),%esi;
- #define MOVE_5 movl 16(%esp),%eax; movl 20(%esp),%ebx; \
- movl 24(%esp),%ecx; movl 28(%esp),%edx; \
- movl 32(%esp),%esi; movl 36(%esp),%edi;
-
- #endif
-
- #define POP_0 /* No arguments to pop. */
- #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;
-
- .text
-
- #ifdef __ELF__
- #define _syscall syscall
- #endif
-
- #if defined(__i486__) || defined(i486)
- .align 4
- #else
- .align 2
- #endif
- .globl _syscall
- _syscall:
- PUSH_5
- #if defined(__PIC__) || defined (__pic__)
- call L4
- L4:
- popl %ebx
- addl $_GLOBAL_OFFSET_TABLE_+[.-L4],%ebx
- pushl %ebx
- MOVE_5
- int $0x80
- popl %ebx
- movl %eax,%edx
- test %edx,%edx
- jge Lexit
- negl %edx
- movl _errno@GOT(%ebx),%eax
- movl %edx,(%eax)
- movl $-1,%eax
- #else
- MOVE_5
- int $0x80
- test %eax,%eax
- jge Lexit
- negl %eax
- movl %eax,_errno
- movl $-1,%eax
- #endif
-
- Lexit:
- POP_5
- ret
-
- #ifdef __ELF__
- .type syscall,@function
- #endif
-