1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/* $NetBSD: setjmp.S,v 1.3 1997/12/05 02:06:27 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#define LOCORE
#include <machine/setjmp.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,
* and the previous signal state.
*/
ENTRY(setjmp, 1)
alloc loc0=ar.pfs,1,2,3,0
mov loc1=rp
;;
mov out0=1 // how = SIG_BLOCK
mov out1=0 // set = NULL
add out2=J_SIGSET,in0 // oset = &jb[J_SIGSET]
br.call.sptk.few rp=__sys_sigprocmask
;;
mov rp=loc1
mov r14=loc0
;;
alloc r15=ar.pfs,1,0,0,0 // drop register frame
;;
mov ar.pfs=r14 // restore ar.pfs
br.sptk.many _setjmp // finish saving state
END(setjmp)
WEAK_ALIAS(longjmp,__longjmp)
ENTRY(__longjmp, 2)
alloc loc0=ar.pfs,2,2,3,0
mov loc1=rp
;;
mov out0=3 // how = SIG_SETMASK
add out1=J_SIGSET,in0 // set = &jb[J_SIGSET]
mov out2=0 // oset = NULL
br.call.sptk.few rp=__sys_sigprocmask
;;
mov rp=loc1
mov r14=loc0
;;
alloc r15=ar.pfs,2,0,0,0 // drop register frame
;;
mov ar.pfs=r14 // restore ar.pfs
br.sptk.many _longjmp // finish restoring state
END(__longjmp)
|
