134 lines
3.4 KiB
ArmAsm
134 lines
3.4 KiB
ArmAsm
/*.$NetBSD: setjmp.S,v 1.1 2014/08/10 05:47:36 matt Exp $.*/
|
|
|
|
/*-
|
|
* Copyright (c) 2014 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Matt Thomas of 3am Software Foundry.
|
|
*
|
|
* 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>
|
|
#include "assym.h"
|
|
|
|
/*
|
|
* 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.
|
|
* The previous signal state is restored.
|
|
*/
|
|
|
|
.section .rodata.cst8,"aM",@progbits,8
|
|
.align 3
|
|
.L_MAGIC:
|
|
.xword _JB_MAGIC_AARCH64_SETJMP
|
|
|
|
ENTRY(__setjmp14)
|
|
adrp x7, .L_MAGIC
|
|
ldr x7, [x7, #:lo12:.L_MAGIC]
|
|
|
|
mov x3, sp
|
|
stp x7, x3, [x0, #_JB_MAGIC]
|
|
|
|
stp x19, x20, [x0, #_JB_X19]
|
|
stp x21, x22, [x0, #_JB_X21]
|
|
stp x23, x24, [x0, #_JB_X23]
|
|
stp x25, x26, [x0, #_JB_X25]
|
|
stp x27, x28, [x0, #_JB_X27]
|
|
stp x29, x30, [x0, #_JB_X29]
|
|
|
|
mrs x5, tpidr_el0
|
|
str x5, [x0, #_JB_TPIDR]
|
|
|
|
stp d8, d9, [x0, #_JB_D8]
|
|
stp d10, d11, [x0, #_JB_D10]
|
|
stp d12, d13, [x0, #_JB_D12]
|
|
stp d14, d15, [x0, #_JB_D14]
|
|
|
|
/* Get the signal mask. */
|
|
add x2, x0, #_JB_SIGMASK
|
|
mov x1, #0
|
|
mov x0, #0
|
|
|
|
stp x29, x30, [sp, #-16]!
|
|
mov x29, sp
|
|
bl _C_LABEL(__sigprocmask14)
|
|
ldp x29, x30, [sp], #16
|
|
|
|
mov x0, xzr
|
|
ret
|
|
END(__setjmp14)
|
|
|
|
ENTRY(__longjmp14)
|
|
adrp x7, .L_MAGIC
|
|
ldr x7, [x7, #:lo12:.L_MAGIC]
|
|
ldp x2, x3, [x0, #_JB_MAGIC]
|
|
cmp x2, x7
|
|
b.ne .Lbotch
|
|
|
|
ldp x4, x5, [x0, #_JB_X29]
|
|
cbz x3, .Lbotch
|
|
cbz x4, .Lbotch
|
|
cbz x5, .Lbotch
|
|
|
|
ldp x19, x20, [x0, #_JB_X19]
|
|
ldp x21, x22, [x0, #_JB_X21]
|
|
ldp x23, x24, [x0, #_JB_X23]
|
|
ldp x25, x26, [x0, #_JB_X25]
|
|
ldp x27, x28, [x0, #_JB_X27]
|
|
|
|
ldr x5, [x0, #_JB_TPIDR]
|
|
msr tpidr_el0, x5
|
|
|
|
ldp d8, d9, [x0, #_JB_D8]
|
|
ldp d10, d11, [x0, #_JB_D10]
|
|
ldp d12, d13, [x0, #_JB_D12]
|
|
ldp d14, d15, [x0, #_JB_D14]
|
|
|
|
sub sp, x3, #32
|
|
|
|
stp x4, x5, [sp, #16]
|
|
str x1, [sp, #8]
|
|
add x29, sp, #16
|
|
|
|
mov x2, #0
|
|
add x1, x0, #_JB_SIGMASK
|
|
mov x0, #3 /* SIG_SETMASK */
|
|
bl _C_LABEL(__sigprocmask14)
|
|
|
|
ldp x29, x30, [sp, #16]
|
|
ldr x0, [sp, #8]
|
|
add sp, sp, #32
|
|
ret
|
|
|
|
/* validation failed, die die die. */
|
|
.Lbotch:
|
|
bl _C_LABEL(longjmperror)
|
|
bl _C_LABEL(abort)
|
|
1: b 1b /* Cannot get here */
|
|
END(__longjmp14)
|