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127 lines
3.0 KiB
ArmAsm
127 lines
3.0 KiB
ArmAsm
/* Copyright (C) 2009-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep-cancel.h>
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#include <socketcall.h>
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#define P(a, b) P2(a, b)
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#define P2(a, b) a##b
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/* The socket-oriented system calls are handled unusally in Linux.
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They are all gated through the single `socketcall' system call number.
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`socketcall' takes two arguments: the first is the subcode, specifying
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which socket function is being called; and the second is a pointer to
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the arguments to the specific function.
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The .S files for the other calls just #define socket and #include this.
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They also #define a 'number-of-arguments' word in NARGS, which
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defaults to 3. */
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#ifndef NARGS
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# ifdef socket
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# error NARGS not defined
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# endif
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# define NARGS 3
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#endif
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/* Stack usage:
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0 - r15 (return address)
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4 - 12 args to syscall
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16 - scratch for cancellation state
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20 - scratch for return value
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*/
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#define stackadjust 24
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#ifndef __socket
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# ifndef NO_WEAK_ALIAS
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# define __socket P(__,socket)
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# else
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# define __socket socket
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# endif
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#endif
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.text
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ENTRY(__socket)
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addik r1,r1,-stackadjust
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swi r15,r1,0
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#if NARGS >= 1
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swi r5,r1,stackadjust+4
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#endif
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#if NARGS >= 2
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swi r6,r1,stackadjust+8
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#endif
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#if NARGS >= 3
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swi r7,r1,stackadjust+12
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#endif
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#if NARGS >= 4
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swi r8,r1,stackadjust+16
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#endif
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#if NARGS >= 5
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swi r9,r1,stackadjust+20
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#endif
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#if NARGS >= 6
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swi r10,r1,stackadjust+24
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#endif
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/* The rest of the args (if any) are on the caller's stack already. */
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#if defined NEED_CANCELLATION && defined CENABLE
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SINGLE_THREAD_P
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bnei r12,L(socket_cancel)
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#endif
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addik r12,r0,SYS_ify(socketcall)
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addik r5,r0,P(SOCKOP_,socket)
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addik r6,r1,stackadjust+4
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brki r14,8
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addk r0,r0,r0
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lwi r15,r1,0
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addik r1,r1,stackadjust
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addik r4,r0,-4095
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cmpu r4,r4,r3
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bgei r4,SYSCALL_ERROR_LABEL
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rtsd r15,8
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addk r0,r0,r0
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#if defined NEED_CANCELLATION && defined CENABLE
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L(socket_cancel):
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CENABLE
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swi r3,r1,16
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addik r12,r0,SYS_ify(socketcall)
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addik r5,r0,P(SOCKOP_,socket)
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addik r6,r1,stackadjust+4
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brki r14,8
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addk r0,r0,r0
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swi r3,r1,20
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lwi r5,r1,16
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CDISABLE
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lwi r3,r1,20
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lwi r15,r1,0
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addik r1,r1,stackadjust
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addik r4,r0,-4095
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cmpu r4,r4,r3
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bgei r4,SYSCALL_ERROR_LABEL
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rtsd r15,8
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addk r0,r0,r0
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#endif
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PSEUDO_END (__socket)
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#ifndef NO_WEAK_ALIAS
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weak_alias (__socket, socket)
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#endif
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