diff options
Diffstat (limited to 'sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h b/sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h deleted file mode 100644 index d0c1c10dba..0000000000 --- a/sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h +++ /dev/null @@ -1,86 +0,0 @@ -/* Copyright (C) 1992, 1993, 1995 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. */ - -/* In the Linux/ELF world, C symbols are asm symbols. */ -#define NO_UNDERSCORES - -/* There is some commonality. */ -#include <sysdeps/unix/i386/sysdep.h> - -#ifdef ASSEMBLER - -/* Linux uses a negative return value to indicate syscall errors, unlike - most Unices, which use the condition codes' carry flag. */ -#undef PSEUDO -#define PSEUDO(name, syscall_name, args) \ - .text; \ - .globl __syscall_error; \ - ENTRY (name) \ - movl $SYS_##syscall_name, %eax; \ - DO_CALL (args) \ - testl %eax, %eax; \ - jl JUMPTARGET(__syscall_error) - - -/* Linux takes system call arguments in registers: - - syscall number %eax call-clobbered - arg 1 %ebx call-saved - arg 2 %ecx call-clobbered - arg 3 %edx call-clobbered - arg 4 %esi call-saved - arg 5 %edi call-saved - - The stack layout upon entering the function is: - - 24(%esp) Arg# 5 - 20(%esp) Arg# 4 - 16(%esp) Arg# 3 - 12(%esp) Arg# 2 - 8(%esp) Arg# 1 - 4(%esp) Return address - (%esp) - - (Of course a function with e.g. 3 argumentS does not have entries for - arguments 4 and 5.) - - We put the arguments into registers from the stack, and save the - call-saved registers, by using the 386 `xchg' instruction to swap the - values in both directions. */ - -#undef DO_CALL -#define DO_CALL(args) \ - DOARGS_##args \ - int $0x80; \ - UNDOARGS_##args \ - -#define DOARGS_0 /* No arguments to frob. */ -#define UNDOARGS_0 /* No arguments to unfrob. */ -#define DOARGS_1 xchg 8(%esp), %ebx; DOARGS_0 /* Save %ebx on stack. */ -#define UNDOARGS_1 xchg 8(%esp), %ebx; UNDOARGS_0 /* Restore %ebx */ -#define DOARGS_2 movel 12(%esp), %ecx; DOARGS_1 -#define UNDOARGS_2 UNDOARGS_1 /* %ecx is clobbered. */ -#define DOARGS_3 movel 16(%esp), %edx; DOARGS_2 -#define UNDOARGS_3 UNDOARGS_2 /* %edx is clobbered. */ -#define DOARGS_4 xchg 20(%esp), %esi; DOARGS_3 /* Save %esi on stack. */ -#define UNDOARGS_4 xchg 20(%esp), %esi; UNDOARGS_3 /* Restore %esi. */ -#define DOARGS_5 xchg 24(%esp), %edi; DOARGS_3 /* Save %edi on stack. */ -#define UNDOARGS_5 xchg 24(%esp), %edi; UNDOARGS_3 /* Restore %edi. */ - - -#endif /* ASSEMBLER */ |