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/* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep-cancel.h>
#include <socketcall.h>
/* &%/$&!! preprocessor */
#define P(a, b) P2(a, b)
#define P2(a, b) a##b
.text
/* 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. */
#ifndef __socket
#ifndef NO_WEAK_ALIAS
#define __socket P(__,socket)
#else
#define __socket socket
#endif
#endif
#ifndef NARGS /* The socket.o object is compiled directly ... */
#define NARGS 3
#endif
.globl __socket
ENTRY(__socket)
/* Save registers and setup stack. */
stmg %r6,%r15,48(%r15) /* Save registers. */
cfi_offset (%r15,-40)
cfi_offset (%r14,-48)
cfi_offset (%r13,-56)
cfi_offset (%r12,-64)
cfi_offset (%r11,-72)
cfi_offset (%r10,-80)
cfi_offset (%r9,-88)
cfi_offset (%r8,-96)
cfi_offset (%r7,-104)
cfi_offset (%r6,-112)
lgr %r1,%r15
lg %r0,8(%r15) /* Load eos. */
aghi %r15,-208 /* Buy stack space. */
cfi_adjust_cfa_offset (208)
stg %r1,0(%r15) /* Store back chain. */
stg %r0,8(%r15) /* Store eos. */
/* Reorder arguments. */
#if (NARGS >= 6)
mvc 200(8,%r15),368(%r15) /* Move between parameter lists. */
#endif
#if (NARGS >= 5)
stg %r6,192(%r15) /* Store into parameter list. */
#endif
#if (NARGS >= 4)
stg %r5,184(%r15) /* Store into parameter list. */
#endif
#if (NARGS >= 3)
stg %r4,176(%r15) /* Store into parameter list. */
#endif
#if (NARGS >= 2)
stg %r3,168(%r15) /* Store into parameter list. */
stg %r2,160(%r15)
#endif
#if defined NEED_CANCELLATION && defined CENABLE
SINGLE_THREAD_P
jne L(socket_cancel)
#endif
/* Load subcode for socket syscall. */
lghi %r2,P(SOCKOP_,socket)
la %r3,160(%r15) /* Load address of parameter list. */
/* Do the system call trap. */
svc SYS_ify(socketcall)
4:
lg %r15,0(%r15) /* Load back chain. */
lmg %r6,15,48(%r15) /* Load registers. */
/* gpr2 is < 0 if there was an error. */
lghi %r0,-125
clgr %r2,%r0
jgnl SYSCALL_ERROR_LABEL
/* Successful; return the syscall's value. */
br %r14
#if defined NEED_CANCELLATION && defined CENABLE
L(socket_cancel):
brasl %r14,CENABLE
lr %r0,%r2
/* Load subcode for socket syscall. */
lghi %r2,P(SOCKOP_,socket)
la %r3,160(%r15) /* Load address of parameter list. */
/* Do the system call trap. */
svc SYS_ify(socketcall)
lgr %r12,%r2
lr %r2,%r0
brasl %r14,CDISABLE
lgr %r2,%r12
j 4b
#endif
SYSCALL_ERROR_HANDLER
END (__socket)
#ifndef NO_WEAK_ALIAS
weak_alias (__socket, socket)
#endif
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