asm_subr.s revision ebe15f48e9897d68d978938414a5c16cb0ceb049
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "asm_subr.s"
#include <SYS.h>
/ This is where execution resumes when a thread created with
/ thr_create() or pthread_create() returns (see setup_context()).
/ We pass the (void *) return value to _thrp_terminate().
ENTRY(_lwp_start)
addl $4, %esp
pushl %eax
call _thrp_terminate
addl $4, %esp / actually, never returns
SET_SIZE(_lwp_start)
/ All we need to do now is (carefully) call lwp_exit().
ENTRY(_lwp_terminate)
SYSTRAP_RVAL1(lwp_exit)
RET / if we return, it is very bad
SET_SIZE(_lwp_terminate)
ENTRY(set_curthread)
movl 4(%esp), %eax
movl %eax, %gs:0
ret
SET_SIZE(set_curthread)
ENTRY(__lwp_park)
popl %edx / add subcode; save return address
pushl $0
pushl %edx
SYSTRAP_RVAL1(lwp_park)
SYSLWPERR
popl %edx / restore return address
movl %edx, 0(%esp)
RET
SET_SIZE(__lwp_park)
ENTRY(__lwp_unpark)
popl %edx / add subcode; save return address
pushl $1
pushl %edx
SYSTRAP_RVAL1(lwp_park)
SYSLWPERR
popl %edx / restore return address
movl %edx, 0(%esp)
RET
SET_SIZE(__lwp_unpark)
ENTRY(__lwp_unpark_all)
popl %edx / add subcode; save return address
pushl $2
pushl %edx
SYSTRAP_RVAL1(lwp_park)
SYSLWPERR
popl %edx / restore return address
movl %edx, 0(%esp)
RET
SET_SIZE(__lwp_unpark_all)
/*
* __sighndlr(int sig, siginfo_t *si, ucontext_t *uc, void (*hndlr)())
*
* This is called from sigacthandler() for the purpose of
* communicating the ucontext to java's stack tracing functions
* and to ensure a 16-byte aligned stack pointer for the benefit
* of gcc-compiled floating point code
*/
ENTRY(__sighndlr)
.globl __sighndlrend
pushl %ebp
movl %esp, %ebp
andl $-16,%esp / make sure handler is called with
subl $4,%esp / a 16-byte aligned stack pointer
pushl 16(%ebp)
pushl 12(%ebp)
pushl 8(%ebp)
call *20(%ebp)
leave
ret
__sighndlrend:
SET_SIZE(__sighndlr)
/*
* int _sigsetjmp(sigjmp_buf env, int savemask)
*
* This version is faster than the old non-threaded version because we
* don't normally have to call __getcontext() to get the signal mask.
* (We have a copy of it in the ulwp_t structure.)
*/
#undef sigsetjmp
ENTRY2(sigsetjmp,_sigsetjmp) / EIP already pushed
pusha / EAX .. EDI
push %ds / segment registers
push %es
push %fs
push %gs
push %ss
push %cs
/ args: cs, ss, gs, ..., eip, env, savemask
call __csigsetjmp
addl $56, %esp / pop 14 words
ret
SET_SIZE(sigsetjmp)
SET_SIZE(_sigsetjmp)