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- /* Copyright (C) 1991, 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 <sysdep.h>
-
- .globl syscall_error
-
- /* The socket-oriented system calls are handled unusally in Linux.
- They are all gated through the single `socketcall' system call number.
- `socketcall' takes two arguments: the first is the subcode, specifying
- which socket function is being called; and the second is a pointer to
- the arguments to specific function.
-
- The .S files for the other calls just #define socket and #include this. */
-
- ENTRY (socket)
-
- /* Save registers. */
- pushl %ebx
- pushl %ecx
-
- movl $__NR_socketcall, %eax /* System call number in %eax. */
-
- /* Use ## so `socket' is a separate token that might be #define'd. */
- movl $SYS_##socket, %ebx /* Subcode is first arg to syscall. */
- lea 12(%esp), %ecx /* Address of args in 2nd arg. */
-
- /* Do the system call trap. */
- int $0x80
-
- /* Restore registers. */
- popl %ecx
- popl %ebx
-
- /* %eax is < 0 if there was an error. */
- testl %eax, %eax
- jl syscall_error
-
- /* Successful; return the syscall's value. */
- ret
-