projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2009-2015 Free Software Foundation, Inc. |
| 7756ba9d DH |
2 | |
| 3 | This file is part of the GNU C Library. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public License as | |
| 7 | published by the Free Software Foundation; either version 2.1 of the | |
| 8 | License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 19 | #include <sysdep-cancel.h> | |
| 20 | #include <socketcall.h> | |
| 21 | ||
| 22 | #define P(a, b) P2(a, b) | |
| 23 | #define P2(a, b) a##b | |
| 24 | ||
| 25 | /* The socket-oriented system calls are handled unusally in Linux. | |
| 26 | They are all gated through the single `socketcall' system call number. | |
| 27 | `socketcall' takes two arguments: the first is the subcode, specifying | |
| 28 | which socket function is being called; and the second is a pointer to | |
| 29 | the arguments to the specific function. | |
| 30 | ||
| 31 | The .S files for the other calls just #define socket and #include this. | |
| 32 | They also #define a 'number-of-arguments' word in NARGS, which | |
| 33 | defaults to 3. */ | |
| 34 | ||
| 35 | #ifndef NARGS | |
| 36 | # ifdef socket | |
| 37 | # error NARGS not defined | |
| 38 | # endif | |
| 39 | # define NARGS 3 | |
| 40 | #endif | |
| 41 | ||
| 42 | /* Stack usage: | |
| 43 | 0 - r15 (return address) | |
| 44 | 4 - 12 args to syscall | |
| 45 | 16 - scratch for cancellation state | |
| 46 | 20 - scratch for return value | |
| 47 | */ | |
| 48 | #define stackadjust 24 | |
| 49 | ||
| 50 | #ifndef __socket | |
| 51 | # ifndef NO_WEAK_ALIAS | |
| 52 | # define __socket P(__,socket) | |
| 53 | # else | |
| 54 | # define __socket socket | |
| 55 | # endif | |
| 56 | #endif | |
| 57 | ||
| 58 | .text | |
| 59 | ENTRY(__socket) | |
| 60 | addik r1,r1,-stackadjust | |
| 61 | swi r15,r1,0 | |
| 62 | #if NARGS >= 1 | |
| 63 | swi r5,r1,stackadjust+4 | |
| 64 | #endif | |
| 65 | #if NARGS >= 2 | |
| 66 | swi r6,r1,stackadjust+8 | |
| 67 | #endif | |
| 68 | #if NARGS >= 3 | |
| 69 | swi r7,r1,stackadjust+12 | |
| 70 | #endif | |
| 71 | #if NARGS >= 4 | |
| 72 | swi r8,r1,stackadjust+16 | |
| 73 | #endif | |
| 74 | #if NARGS >= 5 | |
| 75 | swi r9,r1,stackadjust+20 | |
| 76 | #endif | |
| 77 | #if NARGS >= 6 | |
| 78 | swi r10,r1,stackadjust+24 | |
| 79 | #endif | |
| 80 | /* The rest of the args (if any) are on the caller's stack already. */ | |
| 81 | ||
| 82 | #if defined NEED_CANCELLATION && defined CENABLE | |
| 0cdcad17 | 83 | SINGLE_THREAD_P(r12) |
| 7756ba9d DH |
84 | bnei r12,L(socket_cancel) |
| 85 | #endif | |
| 86 | ||
| 87 | addik r12,r0,SYS_ify(socketcall) | |
| 88 | addik r5,r0,P(SOCKOP_,socket) | |
| 89 | addik r6,r1,stackadjust+4 | |
| 90 | brki r14,8 | |
| 91 | addk r0,r0,r0 | |
| 92 | lwi r15,r1,0 | |
| 93 | addik r1,r1,stackadjust | |
| 94 | addik r4,r0,-4095 | |
| 95 | cmpu r4,r4,r3 | |
| 96 | bgei r4,SYSCALL_ERROR_LABEL | |
| 97 | rtsd r15,8 | |
| 98 | addk r0,r0,r0 | |
| 99 | ||
| 100 | #if defined NEED_CANCELLATION && defined CENABLE | |
| 101 | L(socket_cancel): | |
| 102 | CENABLE | |
| 103 | swi r3,r1,16 | |
| 104 | addik r12,r0,SYS_ify(socketcall) | |
| 105 | addik r5,r0,P(SOCKOP_,socket) | |
| 106 | addik r6,r1,stackadjust+4 | |
| 107 | brki r14,8 | |
| 108 | addk r0,r0,r0 | |
| 109 | swi r3,r1,20 | |
| 110 | lwi r5,r1,16 | |
| 111 | CDISABLE | |
| 112 | lwi r3,r1,20 | |
| 113 | lwi r15,r1,0 | |
| 114 | addik r1,r1,stackadjust | |
| 115 | addik r4,r0,-4095 | |
| 116 | cmpu r4,r4,r3 | |
| 117 | bgei r4,SYSCALL_ERROR_LABEL | |
| 118 | rtsd r15,8 | |
| 119 | addk r0,r0,r0 | |
| 120 | #endif | |
| 121 | ||
| 122 | PSEUDO_END (__socket) | |
| 123 | ||
| 124 | #ifndef NO_WEAK_ALIAS | |
| 125 | weak_alias (__socket, socket) | |
| 126 | #endif |