1 /* Copyright (C) 1995-1998,2002,2003,2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 #include <sysdep-cancel.h>
20 #include <socketcall.h>
23 #define P(a, b) P2(a, b)
27 /* The socket-oriented system calls are handled unusally in Linux.
28 They are all gated through the single `socketcall' system call number.
29 `socketcall' takes two arguments: the first is the subcode, specifying
30 which socket function is being called; and the second is a pointer to
31 the arguments to the specific function.
33 The .S files for the other calls just #define socket and #include this. */
36 # ifndef NO_WEAK_ALIAS
37 # define __socket P(__,socket)
39 # define __socket socket
45 #if defined NEED_CANCELLATION && defined CENABLE
54 movl $SYS_ify(socketcall), %eax /* System call number in %eax. */
56 /* Use ## so `socket' is a separate token that might be #define'd. */
57 movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */
58 lea 4(%esp), %ecx /* Address of args is 2nd arg. */
60 /* Do the system call trap. */
63 /* Restore registers. */
67 /* %eax is < 0 if there was an error. */
69 jae SYSCALL_ERROR_LABEL
71 /* Successful; return the syscall's value. */
76 #if defined NEED_CANCELLATION && defined CENABLE
77 /* We need one more register. */
79 cfi_adjust_cfa_offset(4)
81 /* Enable asynchronous cancellation. */
84 cfi_offset(6, -8) /* %esi */
90 movl $SYS_ify(socketcall), %eax /* System call number in %eax. */
92 /* Use ## so `socket' is a separate token that might be #define'd. */
93 movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */
94 lea 8(%esp), %ecx /* Address of args is 2nd arg. */
96 /* Do the system call trap. */
99 /* Restore registers. */
103 /* Restore the cancellation. */
107 /* Restore registers. */
111 cfi_adjust_cfa_offset(-4)
113 /* %eax is < 0 if there was an error. */
115 jae SYSCALL_ERROR_LABEL
117 /* Successful; return the syscall's value. */
120 PSEUDO_END (__socket)
122 #ifndef NO_WEAK_ALIAS
123 weak_alias (__socket, socket)