b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
128 lines
3.6 KiB
ArmAsm
128 lines
3.6 KiB
ArmAsm
/* $NetBSD: _setjmp.S,v 1.4 2008/04/28 20:22:56 martin Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Matthew Fredette.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
/* XXX fredette - this is awful */
|
|
#define _LOCORE
|
|
#include <machine/frame.h>
|
|
#undef _LOCORE
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
RCSID("$NetBSD: _setjmp.S,v 1.4 2008/04/28 20:22:56 martin Exp $")
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
/*
|
|
* C library -- setjmp, longjmp
|
|
*
|
|
* longjmp(a,v)
|
|
* will generate a "return(v)" from
|
|
* the last call to
|
|
* setjmp(a)
|
|
* by restoring registers from the stack,
|
|
* and a struct sigcontext, see <signal.h>
|
|
*/
|
|
|
|
ENTRY(_setjmp,0)
|
|
/* A sigcontext is at the beginning of our jmp_buf. */
|
|
stw %r0, 0(%arg0) ; no onstack
|
|
stw %r0, 4(%arg0) ; unused word (old style signal mask)
|
|
stw %sp, 8(%arg0) ; sc.sc_sp = %sp
|
|
stw %r0, 16(%arg0) ; sc.sc_ap = NULL
|
|
mfsp %sr0, %r1
|
|
stw %r1, 20(%arg0) ; sc.sc_pcsqh = %sr0
|
|
stw %rp, 24(%arg0) ; sc.sc_pcoqh = %rp
|
|
stw %r1, 28(%arg0) ; sc.sc_pcsqh = %sr0
|
|
ldo 4(%rp), %r1
|
|
stw %r1, 32(%arg0) ; sc.sc_pcoqt = %rp + 4
|
|
stw %r0, 36(%arg0) ; set sc.sc_ps
|
|
|
|
/* We store all callee-saved registers after the sigcontext. */
|
|
ldo 56(%arg0), %r1
|
|
stwm %r3, 4(%r1)
|
|
stwm %r4, 4(%r1)
|
|
stwm %r5, 4(%r1)
|
|
stwm %r6, 4(%r1)
|
|
stwm %r7, 4(%r1)
|
|
stwm %r8, 4(%r1)
|
|
stwm %r9, 4(%r1)
|
|
stwm %r10, 4(%r1)
|
|
stwm %r11, 4(%r1)
|
|
stwm %r12, 4(%r1)
|
|
stwm %r13, 4(%r1)
|
|
stwm %r14, 4(%r1)
|
|
stwm %r15, 4(%r1)
|
|
stwm %r16, 4(%r1)
|
|
stwm %r17, 4(%r1)
|
|
stwm %r18, 4(%r1)
|
|
|
|
/* Return 0. */
|
|
bv %r0(%rp)
|
|
copy %r0, %ret0
|
|
EXIT(_setjmp)
|
|
|
|
ENTRY(_longjmp,0)
|
|
ldw 8(%arg0), %r1 ; ensure non-zero SP
|
|
combt,=,n %r0, %r1, botch ; oops!
|
|
add,<> %r0, %arg1, %ret0 ; ensure return value non-zero
|
|
ldi 1, %ret0
|
|
|
|
/* restore callee-saved registers */
|
|
ldo 56(%arg0), %r1
|
|
ldwm 4(%r1), %r3
|
|
ldwm 4(%r1), %r4
|
|
ldwm 4(%r1), %r5
|
|
ldwm 4(%r1), %r6
|
|
ldwm 4(%r1), %r7
|
|
ldwm 4(%r1), %r8
|
|
ldwm 4(%r1), %r9
|
|
ldwm 4(%r1), %r10
|
|
ldwm 4(%r1), %r11
|
|
ldwm 4(%r1), %r12
|
|
ldwm 4(%r1), %r13
|
|
ldwm 4(%r1), %r14
|
|
ldwm 4(%r1), %r15
|
|
ldwm 4(%r1), %r16
|
|
ldwm 4(%r1), %r17
|
|
ldwm 4(%r1), %r18
|
|
|
|
/* restore the rest */
|
|
ldw 8(%arg0), %sp
|
|
ldw 24(%arg0), %rp
|
|
bv %r0(%rp)
|
|
nop
|
|
botch:
|
|
bl longjmperror, %rp
|
|
nop
|
|
bl abort, %rp
|
|
nop
|
|
EXIT(_longjmp)
|
|
|
|
.end
|