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/* Copyright (C) 1998, 2002, 2003 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep-cancel.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#include "kernel-features.h"
.text
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
#define SELECT __select_tv64
#else
#define SELECT __select
#endif
#if defined __ASSUME_TIMEVAL64
PSEUDO(SELECT, select, 5)
ret
PSEUDO_END(SELECT)
#else
/* The problem here is that initially we made struct timeval compatible with
OSF/1, using int32. But we defined time_t with uint64, and later found
that POSIX requires tv_sec to be time_t.
So now we have to do compatibility stuff. */
/* The variable is shared between all wrappers around signal handling
functions which have RT equivalents. */
.comm __libc_missing_axp_tv64, 4
LEAF(SELECT, 64)
ldgp gp, 0(pv)
subq sp, 64, sp
#ifdef PROF
.set noat
lda AT, _mcount
jsr AT, (AT), _mcount
.set at
#endif
.prologue 1
#ifdef CENABLE
SINGLE_THREAD_P (t1)
#else
ldl t0, __libc_missing_axp_tv64
#endif
/* Save timeout early, since we'll need to recover this after
the system call. */
stq a4, 48(sp)
#ifdef CENABLE
bne t1, $do_cancel
#endif
bne t0, $do32
/* Save arguments in case we do need to fall back. */
stq a0, 8(sp)
stq a1, 16(sp)
stq a2, 24(sp)
stq a3, 32(sp)
ldi v0, SYS_ify(select)
callsys
bne a3, $err64
/* Everything ok. */
addq sp, 64, sp
ret
/* If we didn't get ENOSYS, it is a real error. */
.align 3
$err64: cmpeq v0, ENOSYS, t0
beq t0, $error
stl t0, __libc_missing_axp_tv64
/* Recover the saved arguments. */
ldq a4, 48(sp)
ldq a3, 32(sp)
ldq a2, 24(sp)
ldq a1, 16(sp)
ldq a0, 8(sp)
.align 3
$do32:
/* If the timeout argument is present bounce to the smaller fmt. */
beq a4, 1f
ldq t0, 0(a4)
ldq t1, 8(a4)
stl t0, 0(sp)
stl t1, 4(sp)
mov sp, a4
1: ldi v0, SYS_ify(osf_select)
callsys
bne a3, $error
/* ... and bounce the remaining timeout back. */
ldq a4, 48(sp)
beq a4, 2f
ldl t0, 0(sp)
ldl t1, 4(sp)
stq t0, 0(a4)
stq t1, 8(a4)
2: addq sp, 64, sp
ret
#ifdef CENABLE
.align 3
$do_cancel:
/* Save arguments. */
stq a0, 8(sp)
stq a1, 16(sp)
stq a2, 24(sp)
stq a3, 32(sp)
stq ra, 40(sp)
CENABLE
ldl t0, __libc_missing_axp_tv64
bne t0, $do_cancel32
/* Recover the saved arguments. */
ldq a4, 48(sp)
ldq a3, 32(sp)
ldq a2, 24(sp)
ldq a1, 16(sp)
ldq a0, 8(sp)
ldi v0, SYS_ify(select)
callsys
bne a3, $cancel_err64
stq v0, 8(sp)
CDISABLE
ldq v0, 8(sp)
ldq ra, 40(sp)
/* Everything ok. */
addq sp, 64, sp
ret
/* If we didn't get ENOSYS, it is a real error. */
.align 3
$cancel_err64:
cmpeq v0, ENOSYS, t0
beq t0, $cancel_error
stl t0, __libc_missing_axp_tv64
/* Recover the saved arguments. */
.align 3
$do_cancel32:
ldq a4, 48(sp)
ldq a3, 32(sp)
ldq a2, 24(sp)
ldq a1, 16(sp)
ldq a0, 8(sp)
/* If the timeout argument is present bounce to the smaller fmt. */
beq a4, 1f
ldq t0, 0(a4)
ldq t1, 8(a4)
stl t0, 0(sp)
stl t1, 4(sp)
mov sp, a4
1: ldi v0, SYS_ify(osf_select)
callsys
bne a3, $cancel_error
/* ... and bounce the remaining timeout back. */
ldq a4, 48(sp)
beq a4, 2f
ldl t0, 0(sp)
ldl t1, 4(sp)
stq t0, 0(a4)
stq t1, 8(a4)
2: stq v0, 8(sp)
CDISABLE
ldq v0, 8(sp)
ldq ra, 40(sp)
addq sp, 64, sp
ret
.align 3
$cancel_error:
stq v0, 8(sp)
CDISABLE
ldq v0, 8(sp)
ldq ra, 40(sp)
#endif
.align 3
$error:
addq sp, 64, sp
SYSCALL_ERROR_HANDLER
END(SELECT)
#endif /* __ASSUME_TIMEVAL64 */
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
default_symbol_version (__select_tv64, __select, GLIBC_2.1)
/* It seems to me to be a misfeature of the assembler that we can only
have one version-alias per symbol. So create an alias ourselves.
The 'p' is for 'public'. *Shrug* */
strong_alias (__select_tv64, __select_tv64p)
default_symbol_version (__select_tv64p, select, GLIBC_2.1)
libc_hidden_ver (__select_tv64, __select)
strong_alias (__select_tv64, __libc_select)
#else
strong_alias (__select, __libc_select)
weak_alias (__select, select)
libc_hidden_def (__select)
#endif
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