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137 lines
3.8 KiB
ArmAsm
137 lines
3.8 KiB
ArmAsm
/* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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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
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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/* &%/$&!! preprocessor */
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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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.text
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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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#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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#ifndef NARGS /* The socket.o object is compiled directly ... */
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#define NARGS 3
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#endif
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.globl __socket
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ENTRY(__socket)
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/* Save registers and setup stack. */
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stmg %r6,%r15,48(%r15) /* Save registers. */
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cfi_offset (%r15,-40)
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cfi_offset (%r14,-48)
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cfi_offset (%r13,-56)
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cfi_offset (%r12,-64)
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cfi_offset (%r11,-72)
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cfi_offset (%r10,-80)
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cfi_offset (%r9,-88)
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cfi_offset (%r8,-96)
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cfi_offset (%r7,-104)
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cfi_offset (%r6,-112)
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lgr %r1,%r15
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lg %r0,8(%r15) /* Load eos. */
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aghi %r15,-208 /* Buy stack space. */
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cfi_adjust_cfa_offset (208)
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stg %r1,0(%r15) /* Store back chain. */
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stg %r0,8(%r15) /* Store eos. */
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/* Reorder arguments. */
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#if (NARGS >= 6)
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mvc 200(8,%r15),368(%r15) /* Move between parameter lists. */
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#endif
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#if (NARGS >= 5)
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stg %r6,192(%r15) /* Store into parameter list. */
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#endif
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#if (NARGS >= 4)
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stg %r5,184(%r15) /* Store into parameter list. */
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#endif
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#if (NARGS >= 3)
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stg %r4,176(%r15) /* Store into parameter list. */
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#endif
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#if (NARGS >= 2)
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stg %r3,168(%r15) /* Store into parameter list. */
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stg %r2,160(%r15)
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#endif
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#if defined NEED_CANCELLATION && defined CENABLE
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SINGLE_THREAD_P
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jne L(socket_cancel)
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#endif
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/* Load subcode for socket syscall. */
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lghi %r2,P(SOCKOP_,socket)
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la %r3,160(%r15) /* Load address of parameter list. */
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/* Do the system call trap. */
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svc SYS_ify(socketcall)
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4:
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lg %r15,0(%r15) /* Load back chain. */
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lmg %r6,15,48(%r15) /* Load registers. */
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/* gpr2 is < 0 if there was an error. */
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lghi %r0,-125
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clgr %r2,%r0
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jgnl SYSCALL_ERROR_LABEL
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/* Successful; return the syscall's value. */
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br %r14
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#if defined NEED_CANCELLATION && defined CENABLE
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L(socket_cancel):
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brasl %r14,CENABLE
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lr %r0,%r2
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/* Load subcode for socket syscall. */
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lghi %r2,P(SOCKOP_,socket)
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la %r3,160(%r15) /* Load address of parameter list. */
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/* Do the system call trap. */
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svc SYS_ify(socketcall)
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lgr %r12,%r2
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lr %r2,%r0
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brasl %r14,CDISABLE
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lgr %r2,%r12
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j 4b
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#endif
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SYSCALL_ERROR_HANDLER
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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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