1 /* Copyright (C) 1999-2015 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.
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. */
36 #define __socket P(__,socket)
38 #define __socket socket
42 #define PUSHARGS_1 mov.l r4,@-r15; \
43 cfi_adjust_cfa_offset (4); \
44 cfi_rel_offset (r4, 0)
45 #define PUSHARGS_2 mov.l r5,@-r15; \
46 cfi_adjust_cfa_offset (4); \
47 cfi_rel_offset (r5, 0); \
49 #define PUSHARGS_3 mov.l r6,@-r15; \
50 cfi_adjust_cfa_offset (4); \
51 cfi_rel_offset (r6, 0); \
53 #define PUSHARGS_4 mov.l r7,@-r15; \
54 cfi_adjust_cfa_offset (4); \
55 cfi_rel_offset (r7, 0); \
57 #define PUSHARGS_5 PUSHARGS_4 /* Caller has already pushed arg 5 */
58 #define PUSHARGS_6 PUSHARGS_4 /* Caller has already pushed arg 5,6 */
60 #define POPARGS_1 add #4,r15; cfi_adjust_cfa_offset (-4)
61 #define POPARGS_2 add #8,r15; cfi_adjust_cfa_offset (-8)
62 #define POPARGS_3 add #12,r15; cfi_adjust_cfa_offset (-12)
63 #define POPARGS_4 add #16,r15; cfi_adjust_cfa_offset (-16)
64 #define POPARGS_5 POPARGS_4
65 #define POPARGS_6 POPARGS_4
67 #define ADJUSTCFI_1 cfi_adjust_cfa_offset (4); \
69 #define ADJUSTCFI_2 cfi_adjust_cfa_offset (8); \
70 cfi_offset (r4, -4); \
72 #define ADJUSTCFI_3 cfi_adjust_cfa_offset (12); \
73 cfi_offset (r4, -4); \
74 cfi_offset (r5, -8); \
76 #define ADJUSTCFI_4 cfi_adjust_cfa_offset (16); \
77 cfi_offset (r4, -4); \
78 cfi_offset (r5, -8); \
79 cfi_offset (r6, -12); \
81 #define ADJUSTCFI_5 ADJUSTCFI_4
82 #define ADJUSTCFI_6 ADJUSTCFI_4
85 /* If we were called with no wrapper, this is really socket(). */
91 /* This will not work in the case of a socket call being interrupted
92 by a signal. If the signal handler uses any stack the arguments
93 to socket will be trashed. The results of a restart of any
94 socket call are then unpredictable. */
96 /* Push args onto the stack. */
99 #if defined NEED_CANCELLATION && defined CENABLE
104 /* Do the system call trap. */
105 mov #+P(SOCKOP_,socket), r4
110 /* Pop args off the stack */
116 not r1, r1 // r1=0 means r0 = -1 to -4095
117 tst r1, r1 // i.e. error in linux
120 SYSCALL_ERROR_HANDLER
122 /* Successful; return the syscall's value. */
126 #if defined NEED_CANCELLATION && defined CENABLE
128 /* Enable asynchronous cancellation. */
131 cfi_adjust_cfa_offset (4)
132 cfi_rel_offset (pr, 0)
135 cfi_adjust_cfa_offset (-4)
138 /* Do the system call trap. */
139 mov #+P(SOCKOP_,socket), r4
145 cfi_adjust_cfa_offset (4)
146 cfi_rel_offset (pr, 0)
148 cfi_adjust_cfa_offset (4)
149 cfi_rel_offset (r0, 0)
152 cfi_adjust_cfa_offset (-4)
155 cfi_adjust_cfa_offset (-4)
158 /* Pop args off the stack */
164 not r1, r1 // r1=0 means r0 = -1 to -4095
165 tst r1, r1 // i.e. error in linux
173 .long SYS_ify(socketcall)
175 PSEUDO_END (__socket)
177 #ifndef NO_WEAK_ALIAS
178 weak_alias (__socket, socket)