1 /* Copyright (C) 1995-2015 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, see
16 <http://www.gnu.org/licenses/>. */
18 #include <sysdep-cancel.h>
19 #include <socketcall.h>
22 #define P(a, b) P2(a, b)
26 /* The socket-oriented system calls are handled unusally in Linux/i386.
27 They are all gated through the single `socketcall' system call number.
28 `socketcall' takes two arguments: the first is the subcode, specifying
29 which socket function is being called; and the second is a pointer to
30 the arguments to the specific function.
32 The .S files for the other calls just #define socket and #include this. */
35 # ifndef NO_WEAK_ALIAS
36 # define __socket P(__,socket)
38 # define __socket socket
44 #if defined NEED_CANCELLATION && defined CENABLE
53 movl $SYS_ify(socketcall), %eax /* System call number in %eax. */
55 /* Use ## so `socket' is a separate token that might be #define'd. */
56 movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */
57 lea 4(%esp), %ecx /* Address of args is 2nd arg. */
59 /* Do the system call trap. */
62 /* Restore registers. */
66 /* %eax is < 0 if there was an error. */
68 jae SYSCALL_ERROR_LABEL
70 /* Successful; return the syscall's value. */
74 #if defined NEED_CANCELLATION && defined CENABLE
75 /* We need one more register. */
77 cfi_adjust_cfa_offset(4)
79 /* Enable asynchronous cancellation. */
82 cfi_offset(6, -8) /* %esi */
88 movl $SYS_ify(socketcall), %eax /* System call number in %eax. */
90 /* Use ## so `socket' is a separate token that might be #define'd. */
91 movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */
92 lea 8(%esp), %ecx /* Address of args is 2nd arg. */
94 /* Do the system call trap. */
97 /* Restore registers. */
101 /* Restore the cancellation. */
105 /* Restore registers. */
109 cfi_adjust_cfa_offset(-4)
111 /* %eax is < 0 if there was an error. */
113 jae SYSCALL_ERROR_LABEL
115 /* Successful; return the syscall's value. */
118 PSEUDO_END (__socket)
120 #ifndef NO_WEAK_ALIAS
121 weak_alias (__socket, socket)