| /* Copyright (C) 2009-2014 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 Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep-cancel.h> |
| #include <socketcall.h> |
| |
| #define P(a, b) P2(a, b) |
| #define P2(a, b) a##b |
| |
| /* 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 the specific function. |
| |
| The .S files for the other calls just #define socket and #include this. |
| They also #define a 'number-of-arguments' word in NARGS, which |
| defaults to 3. */ |
| |
| #ifndef NARGS |
| # ifdef socket |
| # error NARGS not defined |
| # endif |
| # define NARGS 3 |
| #endif |
| |
| /* Stack usage: |
| 0 - r15 (return address) |
| 4 - 12 args to syscall |
| 16 - scratch for cancellation state |
| 20 - scratch for return value |
| */ |
| #define stackadjust 24 |
| |
| #ifndef __socket |
| # ifndef NO_WEAK_ALIAS |
| # define __socket P(__,socket) |
| # else |
| # define __socket socket |
| # endif |
| #endif |
| |
| .text |
| ENTRY(__socket) |
| addik r1,r1,-stackadjust |
| swi r15,r1,0 |
| #if NARGS >= 1 |
| swi r5,r1,stackadjust+4 |
| #endif |
| #if NARGS >= 2 |
| swi r6,r1,stackadjust+8 |
| #endif |
| #if NARGS >= 3 |
| swi r7,r1,stackadjust+12 |
| #endif |
| #if NARGS >= 4 |
| swi r8,r1,stackadjust+16 |
| #endif |
| #if NARGS >= 5 |
| swi r9,r1,stackadjust+20 |
| #endif |
| #if NARGS >= 6 |
| swi r10,r1,stackadjust+24 |
| #endif |
| /* The rest of the args (if any) are on the caller's stack already. */ |
| |
| #if defined NEED_CANCELLATION && defined CENABLE |
| SINGLE_THREAD_P |
| bnei r12,L(socket_cancel) |
| #endif |
| |
| addik r12,r0,SYS_ify(socketcall) |
| addik r5,r0,P(SOCKOP_,socket) |
| addik r6,r1,stackadjust+4 |
| brki r14,8 |
| addk r0,r0,r0 |
| lwi r15,r1,0 |
| addik r1,r1,stackadjust |
| addik r4,r0,-4095 |
| cmpu r4,r4,r3 |
| bgei r4,SYSCALL_ERROR_LABEL |
| rtsd r15,8 |
| addk r0,r0,r0 |
| |
| #if defined NEED_CANCELLATION && defined CENABLE |
| L(socket_cancel): |
| CENABLE |
| swi r3,r1,16 |
| addik r12,r0,SYS_ify(socketcall) |
| addik r5,r0,P(SOCKOP_,socket) |
| addik r6,r1,stackadjust+4 |
| brki r14,8 |
| addk r0,r0,r0 |
| swi r3,r1,20 |
| lwi r5,r1,16 |
| CDISABLE |
| lwi r3,r1,20 |
| lwi r15,r1,0 |
| addik r1,r1,stackadjust |
| addik r4,r0,-4095 |
| cmpu r4,r4,r3 |
| bgei r4,SYSCALL_ERROR_LABEL |
| rtsd r15,8 |
| addk r0,r0,r0 |
| #endif |
| |
| PSEUDO_END (__socket) |
| |
| #ifndef NO_WEAK_ALIAS |
| weak_alias (__socket, socket) |
| #endif |
