diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/socket.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/socket.S | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/socket.S b/sysdeps/unix/sysv/linux/s390/s390-64/socket.S new file mode 100644 index 0000000000..471c0b5ef2 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-64/socket.S @@ -0,0 +1,99 @@ +/* Copyright (C) 2001 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.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. */ + lgr %r1,%r15 + lg %r0,8(%r15) /* Load eos. */ + ahi %r15,-208 /* Buy stack space. */ + 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 + /* 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) + + 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 + jnl SYSCALL_ERROR_LABEL + + /* Successful; return the syscall's value. */ + br %r14 + +PSEUDO_END (__socket) + +#ifndef NO_WEAK_ALIAS +weak_alias (__socket, socket) +#endif + |