mirror of
https://sourceware.org/git/glibc.git
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242 lines
4.8 KiB
ArmAsm
242 lines
4.8 KiB
ArmAsm
/* Copyright (C) 1998, 2002, 2003 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
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep-cancel.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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#include "kernel-features.h"
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.text
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#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
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#define SELECT __select_tv64
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#else
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#define SELECT __select
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#endif
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#if defined __ASSUME_TIMEVAL64
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PSEUDO(SELECT, select, 5)
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ret
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PSEUDO_END(SELECT)
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#else
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/* The problem here is that initially we made struct timeval compatible with
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OSF/1, using int32. But we defined time_t with uint64, and later found
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that POSIX requires tv_sec to be time_t.
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So now we have to do compatibility stuff. */
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/* The variable is shared between all wrappers around signal handling
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functions which have RT equivalents. */
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.comm __libc_missing_axp_tv64, 4
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LEAF(SELECT, 64)
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ldgp gp, 0(pv)
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subq sp, 64, sp
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#ifdef PROF
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.set noat
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lda AT, _mcount
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jsr AT, (AT), _mcount
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.set at
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#endif
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stq ra, 40(sp)
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.mask 0x4000000, 40-64
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.prologue 1
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#ifdef CENABLE
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SINGLE_THREAD_P (t1)
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#else
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ldl t0, __libc_missing_axp_tv64
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#endif
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/* Save timeout early, since we'll need to recover this after
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the system call. */
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stq a4, 48(sp)
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#ifdef CENABLE
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bne t1, $do_cancel
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#endif
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bne t0, $do32
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/* Save arguments in case we do need to fall back. */
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stq a0, 8(sp)
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stq a1, 16(sp)
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stq a2, 24(sp)
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stq a3, 32(sp)
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ldi v0, SYS_ify(select)
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callsys
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bne a3, $err64
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/* Everything ok. */
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addq sp, 64, sp
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ret
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/* If we didn't get ENOSYS, it is a real error. */
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.align 3
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$err64: cmpeq v0, ENOSYS, t0
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beq t0, $error
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stl t0, __libc_missing_axp_tv64
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/* Recover the saved arguments. */
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ldq a4, 48(sp)
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ldq a3, 32(sp)
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ldq a2, 24(sp)
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ldq a1, 16(sp)
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ldq a0, 8(sp)
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.align 3
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$do32:
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/* If the timeout argument is present bounce to the smaller fmt. */
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beq a4, 1f
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ldq t0, 0(a4)
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ldq t1, 8(a4)
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stl t0, 0(sp)
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stl t1, 4(sp)
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mov sp, a4
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1: ldi v0, SYS_ify(osf_select)
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callsys
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bne a3, $error
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/* ... and bounce the remaining timeout back. */
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ldq a4, 48(sp)
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beq a4, 2f
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ldl t0, 0(sp)
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ldl t1, 4(sp)
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stq t0, 0(a4)
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stq t1, 8(a4)
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2: addq sp, 64, sp
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ret
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#ifdef CENABLE
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.align 3
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$do_cancel:
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/* Save arguments. */
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stq a0, 8(sp)
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stq a1, 16(sp)
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stq a2, 24(sp)
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stq a3, 32(sp)
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CENABLE
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mov v0, ra
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ldl t0, __libc_missing_axp_tv64
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bne t0, $do_cancel32
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/* Recover the saved arguments. */
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ldq a4, 48(sp)
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ldq a3, 32(sp)
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ldq a2, 24(sp)
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ldq a1, 16(sp)
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ldq a0, 8(sp)
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ldi v0, SYS_ify(select)
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callsys
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mov ra, a0
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bne a3, $cancel_err64
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stq v0, 8(sp)
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CDISABLE
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ldq v0, 8(sp)
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ldq ra, 40(sp)
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/* Everything ok. */
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addq sp, 64, sp
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ret
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/* If we didn't get ENOSYS, it is a real error. */
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.align 3
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$cancel_err64:
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cmpeq v0, ENOSYS, t0
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beq t0, $cancel_error
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stl t0, __libc_missing_axp_tv64
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/* Recover the saved arguments. */
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.align 3
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$do_cancel32:
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ldq a4, 48(sp)
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ldq a3, 32(sp)
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ldq a2, 24(sp)
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ldq a1, 16(sp)
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ldq a0, 8(sp)
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/* If the timeout argument is present bounce to the smaller fmt. */
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beq a4, 1f
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ldq t0, 0(a4)
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ldq t1, 8(a4)
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stl t0, 0(sp)
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stl t1, 4(sp)
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mov sp, a4
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1: ldi v0, SYS_ify(osf_select)
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callsys
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mov ra, a0
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bne a3, $cancel_error
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/* ... and bounce the remaining timeout back. */
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ldq a4, 48(sp)
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beq a4, 2f
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ldl t0, 0(sp)
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ldl t1, 4(sp)
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stq t0, 0(a4)
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stq t1, 8(a4)
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2: stq v0, 8(sp)
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CDISABLE
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ldq v0, 8(sp)
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ldq ra, 40(sp)
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addq sp, 64, sp
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ret
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.align 3
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$cancel_error:
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stq v0, 8(sp)
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CDISABLE
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ldq v0, 8(sp)
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ldq ra, 40(sp)
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#endif
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.align 3
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$error:
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addq sp, 64, sp
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SYSCALL_ERROR_HANDLER
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END(SELECT)
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#endif /* __ASSUME_TIMEVAL64 */
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#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
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default_symbol_version (__select_tv64, __select, GLIBC_2.1)
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/* It seems to me to be a misfeature of the assembler that we can only
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have one version-alias per symbol. So create an alias ourselves.
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The 'p' is for 'public'. *Shrug* */
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strong_alias (__select_tv64, __select_tv64p)
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default_symbol_version (__select_tv64p, select, GLIBC_2.1)
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libc_hidden_ver (__select_tv64, __select)
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strong_alias (__select_tv64, __libc_select)
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#else
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strong_alias (__select, __libc_select)
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weak_alias (__select, select)
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libc_hidden_def (__select)
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#endif
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