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- /* Copyright (C) 1992, 1993 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/unix/sysdep.h>
-
- #define ENTRY(name) \
- .globl _##name; \
- .align 2; \
- _##name##:
-
- #define PSEUDO(name, syscall_name, args) \
- .text; \
- .globl syscall_error; \
- ENTRY (name) \
- XCHG_##args
- movl $SYS_##syscall_name, %eax; \
- int $0x80; \
- test %eax, %eax; \
- jl syscall_error; \
- XCHG_##args
-
- /* Linux takes system call arguments in registers:
- 1: %ebx
- 2: %ecx
- 3: %edx
- 4: %esi
- 5: %edi
- We put the arguments into registers from the stack,
- and save the registers, by using the 386 `xchg' instruction
- to swap the values in both directions. */
-
- #define XCHG_0 /* No arguments to frob. */
- #define XCHG_1 xchg 8(%esp), %ebx; XCHG_0
- #define XCHG_2 xchg 12(%esp), %ecx; XCHG_1
- #define XCHG_3 xchg 16(%esp), %edx; XCHG_2
- #define XCHG_4 xchg 20(%esp), %esi; XCHG_3
- #define XCHG_5 xchg 24(%esp), %edi; XCHG_3
-
- #define r0 %eax /* Normal return-value register. */
- #define r1 %edx /* Secondary return-value register. */
- #define scratch %ecx /* Call-clobbered register for random use. */
- #define MOVE(x,y) movl x, y
-