1 /* $NetBSD: longjmp.c,v 1.7 2012/03/17 21:35:06 martin Exp $ */
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christian Limpach.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include "namespace.h"
33 #include <sys/types.h>
41 #define __LIBC12_SOURCE__
43 #include <compat/include/setjmp.h>
54 * setjmp.S uses hard coded offsets into the jump_buf,
55 * make sure any changes cause a compile failure here
57 #ifndef lint /* XXX this is too much for lint */
58 __CTASSERT(0x68 == offsetof(__jmp_buf_regs_t
,save_mask
) +
59 sizeof(struct sigcontext
));
60 __CTASSERT(sizeof(sigjmp_buf
) >= sizeof(__jmp_buf_regs_t
) +
61 sizeof(struct sigcontext
));
65 __longjmp14(jmp_buf env
, int val
)
67 struct sigcontext
*sc
= (void *)env
;
68 __jmp_buf_regs_t
*r
= (void *)&sc
[1];
71 /* Ensure non-zero SP */
76 * Set _UC_CPU. No FPU data saved, so we can't restore
77 * that. Set _UC_{SET,CLR}STACK according to SS_ONSTACK
79 memset(&uc
, 0, sizeof(uc
));
80 uc
.uc_flags
= _UC_CPU
| (sc
->sc_onstack
? _UC_SETSTACK
: _UC_CLRSTACK
);
83 * Set the signal mask - this is a weak symbol, so don't use
84 * _UC_SIGMASK in the mcontext, libpthread might override sigprocmask.
86 sigprocmask(SIG_SETMASK
, &sc
->sc_mask
, NULL
);
88 /* Fill other registers */
89 uc
.uc_mcontext
.__gregs
[_REG_CCR
] = sc
->sc_tstate
;
90 uc
.uc_mcontext
.__gregs
[_REG_PC
] = sc
->sc_pc
;
91 uc
.uc_mcontext
.__gregs
[_REG_nPC
] = sc
->sc_pc
+4;
92 uc
.uc_mcontext
.__gregs
[_REG_G1
] = sc
->sc_g1
;
93 uc
.uc_mcontext
.__gregs
[_REG_G2
] = sc
->sc_o0
;
94 uc
.uc_mcontext
.__gregs
[_REG_G3
] = r
->g3
;
95 uc
.uc_mcontext
.__gregs
[_REG_G4
] = 0;
96 uc
.uc_mcontext
.__gregs
[_REG_G5
] = 0;
97 uc
.uc_mcontext
.__gregs
[_REG_G6
] = r
->g6
;
98 uc
.uc_mcontext
.__gregs
[_REG_G7
] = r
->g7
;
99 uc
.uc_mcontext
.__gregs
[_REG_O6
] = sc
->sc_sp
;
102 /* Make return value non-zero */
106 /* Save return value in context */
107 uc
.uc_mcontext
.__gregs
[_REG_O0
] = val
;