1/* $NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $ */
2
3/*-
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.

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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36__FBSDID("$FreeBSD: head/lib/libc/mips/gen/setjmp.S 178580 2008-04-26 12:08:02Z imp $");
37#include <machine/regnum.h>
38
39#if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93")
41 ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $")
42#endif /* LIBC_SCCS and not lint */
43
44#ifdef __ABICALLS__
45 .abicalls
46#endif
47
48/*
49 * C library -- setjmp, longjmp
50 *
51 * longjmp(a,v)

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56 * and a struct sigcontext, see <signal.h>
57 */
58
59#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2))
60
61
62NESTED(setjmp, SETJMP_FRAME_SIZE, ra)
63 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
64 .set noreorder
65#ifdef __ABICALLS__
66 .cpload t9
67#endif
68 subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame
69#ifdef __ABICALLS__
70 .cprestore 16
71#endif
72 sw ra, CALLFRAME_RA(sp) # save RA
73 sw a0, CALLFRAME_SIZ(sp) # store env
74
75 /* Get the signal mask. */
76 addu a2, a0, _JB_SIGMASK * SZREG # &oenv
77 li a0, 1 # SIG_SETBLOCK
78 move a1, zero # &env == 0
79 la t9, _C_LABEL(sigprocmask) # get current signal mask
80 jal t9
81 nop
82
83 lw a0, CALLFRAME_SIZ(sp) # restore env pointer
84 lw ra, CALLFRAME_RA(sp) # restore RA
85 addu sp, sp, SETJMP_FRAME_SIZE # pop stack frame
86
87 li v0, _JB_MAGIC_SETJMP
88 sw v0, (_JB_MAGIC * SZREG)(a0)
89 sw ra, (_JB_REG_RA * SZREG)(a0)
90 sw s0, (_JB_REG_S0 * SZREG)(a0)
91 sw s1, (_JB_REG_S1 * SZREG)(a0)
92 sw s2, (_JB_REG_S2 * SZREG)(a0)
93 sw s3, (_JB_REG_S3 * SZREG)(a0)
94 sw s4, (_JB_REG_S4 * SZREG)(a0)
95 sw s5, (_JB_REG_S5 * SZREG)(a0)
96 sw s6, (_JB_REG_S6 * SZREG)(a0)
97 sw s7, (_JB_REG_S7 * SZREG)(a0)
98 sw sp, (_JB_REG_SP * SZREG)(a0)
99 sw s8, (_JB_REG_S8 * SZREG)(a0)
100
101 move v0, zero
102 j ra
103END(setjmp)
104
105#define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2))
106
107NESTED(longjmp, LONGJMP_FRAME_SIZE, ra)
108 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
109 .set noreorder
110#ifdef __ABICALLS__
111 .cpload t9
112#endif
113 subu sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame
114#ifdef __ABICALLS__
115 .cprestore 16
116#endif
117 sw ra, CALLFRAME_RA(sp) # save RA
118 lw v0, (_JB_MAGIC * SZREG)(a0)
119 li t0, _JB_MAGIC_SETJMP
120 bne v0, t0, botch # jump if error
121 nop
122
123 sw a0, CALLFRAME_SIZ(sp) # save env
124 sw a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value
125
126 # set sigmask
127 addu a1, a0, _JB_SIGMASK * SZREG # &set
128 move a2, zero # &oset == NULL
129 li a0, 3 # SIG_SETMASK
130 la t9,_C_LABEL(sigprocmask) # set current signal mask
131 jal t9
132 nop
133
134 lw a0, CALLFRAME_SIZ(sp) # restore env
135 lw a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value
136
137 lw ra, (_JB_REG_RA * SZREG)(a0)
138 lw s0, (_JB_REG_S0 * SZREG)(a0)
139 lw s1, (_JB_REG_S1 * SZREG)(a0)
140 lw s2, (_JB_REG_S2 * SZREG)(a0)
141 lw s3, (_JB_REG_S3 * SZREG)(a0)
142 lw s4, (_JB_REG_S4 * SZREG)(a0)
143 lw s5, (_JB_REG_S5 * SZREG)(a0)
144 lw s6, (_JB_REG_S6 * SZREG)(a0)
145 lw s7, (_JB_REG_S7 * SZREG)(a0)
146 lw sp, (_JB_REG_SP * SZREG)(a0)
147 lw s8, (_JB_REG_S8 * SZREG)(a0)
148 move v0, a1
149 j ra
150 nop
151
152botch:
153 la t9, _C_LABEL(longjmperror)
154 jal t9
155 nop
156
157 la t9, _C_LABEL(abort)
158 jal t9
159 nop
160END(longjmp)