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Add cancellation handling.

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This commit is contained in:
Ulrich Drepper 2003-01-07 00:48:34 +00:00
parent 7d983cbb36
commit 2e2b5f5622
2 changed files with 103 additions and 31 deletions
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99
sysdeps/unix/sysv/linux/alpha/select.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1998, 2002 Free Software Foundation, Inc.
/* 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
@ -16,7 +16,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include <sysdep-cancel.h>
#define _ERRNO_H 1
#include <bits/errno.h>
@ -49,12 +49,20 @@ LEAF(SELECT, 64)
#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. */
@ -109,6 +117,93 @@ $do32:
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

35
sysdeps/unix/sysv/linux/alpha/sigsuspend.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1993, 1995, 1996, 1997, 2002 Free Software Foundation, Inc.
/* Copyright (C) 1993,1995,1996,1997,2002,2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Mosberger <davidm@cs.arizona.edu>, 1995.
@ -20,37 +20,14 @@
/* sigsuspend is a special syscall since it needs to dereference the
sigset. This will have to change when we have more than 64 signals. */
#include <sysdep.h>
#include <sysdep-cancel.h>
.text
#undef PSEUDO_PREPARE_ARGS
#define PSEUDO_PREPARE_ARGS ldq a0, 0(a0);
LEAF(__sigsuspend, 0)
#ifdef PROF
ldgp gp, 0(pv)
.set noat
lda AT, _mcount
jsr AT, (AT), _mcount
.set at
.prologue 1
#else
.prologue 0
#endif
ldq a0, 0(a0)
ldi v0, __NR_sigsuspend
call_pal PAL_callsys
bne a3, error
PSEUDO(__sigsuspend, sigsuspend, 1)
ret
error:
#ifndef PROF
br gp, 1f
1: ldgp gp, 0(gp)
#endif
SYSCALL_ERROR_HANDLER
END(__sigsuspend)
PSEUDO_END(__sigsuspend)
libc_hidden_def (__sigsuspend)
weak_alias(__sigsuspend, sigsuspend)
strong_alias (__sigsuspend, __libc_sigsuspend)