/*
* Copyright (c) 2011-2018 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#define JMP_r19_20 #0x00
#define JMP_r21_22 #0x10
#define JMP_r23_24 #0x20
#define JMP_r25_26 #0x30
#define JMP_r27_28 #0x40
#define JMP_fp_lr #0x50
#define JMP_sp_rsvd #0x60 /* second field is reserved/unused */
#define JMP_d8_d9 #0x70
#define JMP_d10_d11 #0x80
#define JMP_d12_d13 #0x90
#define JMP_d14_d15 #0xA0
#define JMP_sig #0xB0
#define JMP_sigflag #0xB8
#include <architecture/arm/asm_help.h>
#include <os/tsd.h>
/* int _setjmp(jmp_buf env) mov x12, sp
_OS_PTR_MUNGE_TOKEN(x16, x16)
_OS_PTR_MUNGE(x10, fp, x16)
_OS_PTR_MUNGE(x11, lr, x16)
_OS_PTR_MUNGE(x12, x12, x16)
stp x19, x20, [x0, JMP_r19_20]
stp x21, x22, [x0, JMP_r21_22]
stp x23, x24, [x0, JMP_r23_24]
stp x25, x26, [x0, JMP_r25_26]
stp x27, x28, [x0, JMP_r27_28]
stp x10, x11, [x0, JMP_fp_lr]
str x12, [x0, JMP_sp_rsvd]
stp d8, d9, [x0, JMP_d8_d9]
stp d10, d11, [x0, JMP_d10_d11]
stp d12, d13, [x0, JMP_d12_d13]
stp d14, d15, [x0, JMP_d14_d15]
mov w0, #0
ret
/* void _longjmp(jmp_buf env, int val) ldp x19, x20, [x0, JMP_r19_20]
ldp x21, x22, [x0, JMP_r21_22]
ldp x23, x24, [x0, JMP_r23_24]
ldp x25, x26, [x0, JMP_r25_26]
ldp x27, x28, [x0, JMP_r27_28]
ldp x10, x11, [x0, JMP_fp_lr]
ldr x12, [x0, JMP_sp_rsvd]
ldp d8, d9, [x0, JMP_d8_d9]
ldp d10, d11, [x0, JMP_d10_d11]
ldp d12, d13, [x0, JMP_d12_d13]
ldp d14, d15, [x0, JMP_d14_d15]
_OS_PTR_MUNGE_TOKEN(x16, x16)
_OS_PTR_UNMUNGE(fp, x10, x16)
_OS_PTR_UNMUNGE(lr, x11, x16)
_OS_PTR_UNMUNGE(x12, x12, x16)
mov sp, x12
cmp w1, #0
csinc w0, w1, wzr, ne
ret
/* int sigsetjmp(sigjmp_buf env, int savemask) str w1, [x0, JMP_sigflag]
cbnz w1, 1f
b __setjmp
1:
/* else, fall through */
/* int setjmp(jmp_buf env) stp x21, lr, [x0]
mov x21, x0
orr w0, wzr, #0x1
mov x1, #0
add x2, x21, JMP_sig
CALL_EXTERNAL(_sigprocmask)
mov x0, x21
ldp x21, lr, [x0]
b __setjmp
/* void siglongjmp(sigjmp_buf env, int val) ldr w8, [x0, JMP_sigflag]
cbnz w8, 1f
b __longjmp
1:
/* else, fall through */
/* void longjmp(jmp_buf env, int val) sub sp, sp, #16
mov x21, x0 // x21/x22 will be restored by __longjmp
mov x22, x1
ldr x8, [x21, JMP_sig] // restore the signal mask
str x8, [sp, #8]
orr w0, wzr, #0x3 // SIG_SETMASK
add x1, sp, #8 // set
mov x2, #0 // oset
CALL_EXTERNAL(_sigprocmask)
mov x0, x21
mov x1, x22
add sp, sp, #16
b __longjmp