diff options
Diffstat (limited to 'sysdeps/unix/sysv/i386/linux/socket.S')
| -rw-r--r-- | sysdeps/unix/sysv/i386/linux/socket.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/i386/linux/socket.S b/sysdeps/unix/sysv/i386/linux/socket.S new file mode 100644 index 0000000000..9f59bad095 --- /dev/null +++ b/sysdeps/unix/sysv/i386/linux/socket.S @@ -0,0 +1,55 @@ +/* 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 |