2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/syscall.h>
38 #include <machine/asm.h>
39 #include <machine/regnum.h>
41 #if defined(LIBC_SCCS)
43 .asciz "$OpenBSD: setjmp.S,v 1.6 1997/07/23 20:55:25 kstailey Exp $"
44 #endif /* LIBC_SCCS */
47 * C library -- setjmp, longjmp
50 * will generate a "return(v)" from
53 * by restoring registers from the stack,
54 * and a struct sigcontext, see <signal.h>
57 #define SETJMP_FRAME_SIZE (STAND_FRAME_SIZE + 12)
59 NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra)
60 .mask 0x80000000, (STAND_RA_OFFSET - STAND_FRAME_SIZE)
61 subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
66 sw ra, STAND_RA_OFFSET(sp) # save state
67 sw a0, SETJMP_FRAME_SIZE(sp)
68 move a0, zero # get current signal mask
69 jal _C_LABEL(sigblock)
70 lw v1, SETJMP_FRAME_SIZE(sp) # v1 = jmpbuf
71 sw v0, (1 * 4)(v1) # save sc_mask = sigblock(0)
73 addu a1, sp, STAND_FRAME_SIZE # pointer to struct sigaltstack
74 jal _C_LABEL(sigaltstack)
75 lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf
76 lw v1, STAND_FRAME_SIZE+8(sp) # get old ss_onstack
77 and v1, v1, 1 # extract onstack flag
78 sw v1, 0(a0) # save it in sc_onstack
79 lw ra, STAND_RA_OFFSET(sp)
80 addu sp, sp, SETJMP_FRAME_SIZE
81 blt v0, zero, botch # check for sigstack() error
82 sw ra, (2 * 4)(a0) # sc_pc = return address
83 li v0, 0xACEDBADE # sigcontext magic number
84 sw v0, ((ZERO + 3) * 4)(a0) # saved in sc_regs[0]
85 sw s0, ((S0 + 3) * 4)(a0)
86 sw s1, ((S1 + 3) * 4)(a0)
87 sw s2, ((S2 + 3) * 4)(a0)
88 sw s3, ((S3 + 3) * 4)(a0)
89 sw s4, ((S4 + 3) * 4)(a0)
90 sw s5, ((S5 + 3) * 4)(a0)
91 sw s6, ((S6 + 3) * 4)(a0)
92 sw s7, ((S7 + 3) * 4)(a0)
93 sw gp, ((GP + 3) * 4)(a0)
94 sw sp, ((SP + 3) * 4)(a0)
95 sw s8, ((S8 + 3) * 4)(a0)
96 li v0, 1 # be nice if we could tell
97 sw v0, (37 * 4)(a0) # sc_fpused = 1
99 swc1 $f20, ((20 + 38) * 4)(a0)
100 swc1 $f21, ((21 + 38) * 4)(a0)
101 swc1 $f22, ((22 + 38) * 4)(a0)
102 swc1 $f23, ((23 + 38) * 4)(a0)
103 swc1 $f24, ((24 + 38) * 4)(a0)
104 swc1 $f25, ((25 + 38) * 4)(a0)
105 swc1 $f26, ((26 + 38) * 4)(a0)
106 swc1 $f27, ((27 + 38) * 4)(a0)
107 swc1 $f28, ((28 + 38) * 4)(a0)
108 swc1 $f29, ((29 + 38) * 4)(a0)
109 swc1 $f30, ((30 + 38) * 4)(a0)
110 swc1 $f31, ((31 + 38) * 4)(a0)
111 sw v0, ((32 + 38) * 4)(a0)
122 sw a1, ((V0 + 3) * 4)(a0) # save return value in sc_regs[V0]
126 jal _C_LABEL(longjmperror)