1 /* $NetBSD: compat___sigtramp1.S,v 1.1 2005/10/15 22:11:22 uwe Exp $ */
4 * Copyright (c) 1996 Paul Kranenburg
6 * The President and Fellows of Harvard College. All rights reserved.
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
10 * This software was developed by the Computer Systems Engineering group
11 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
12 * contributed to Berkeley.
14 * All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Lawrence Berkeley Laboratory.
18 * This product includes software developed by Harvard University.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 * 3. All advertising materials mentioning features or use of this software
29 * must display the following acknowledgement:
30 * This product includes software developed by Harvard University.
31 * This product includes software developed by Paul Kranenburg.
32 * 4. Neither the name of the University nor the names of its contributors
33 * may be used to endorse or promote products derived from this software
34 * without specific prior written permission.
36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 #include <machine/frame.h>
53 #include <machine/psl.h>
54 #include <machine/signal.h>
57 * When this code is run, the stack looks like:
58 * [%sp] 64 bytes to which registers can be dumped
59 * [%sp + 64] signal number (goes in %o0)
60 * [%sp + 64 + 4] signal code (goes in %o1)
61 * [%sp + 64 + 8] placeholder
62 * [%sp + 64 + 12] argument for %o3, currently unsupported (always 0)
63 * [%sp + 64 + 16] first word of saved state (sigcontext)
67 * [%sp + NNN] last word of saved state
68 * (followed by previous stack contents or top of signal stack).
69 * The address of the function to call is in %g1; the old %g1 and %o0
70 * have already been saved in the sigcontext. We are running in a clean
71 * window, all previous windows now being saved to the stack.
73 * Note that [%sp + 64 + 8] == %sp + 64 + 16. The copy at %sp+64+8
74 * will eventually be removed, with a hole left in its place, if things
79 * XXX the `save' and `restore' below are unnecessary: should \
80 * replace with simple arithmetic on %sp \
82 * Make room on the stack for 32 %f registers + %fsr. This comes \
83 * out to 33*4 or 132 bytes, but this must be aligned to a multiple \
84 * of 8, or 136 bytes. \
86 save %sp, -CCFSZ - 136, %sp; \
87 mov %g2, %l2; /* save globals in %l registers */ \
94 * Saving the fpu registers is expensive, so do it iff the fsr \
95 * stored in the sigcontext shows that the fpu is enabled. \
97 ld [%fp + 64 + 16 + SC_PSR_OFFSET], %l0; \
98 sethi %hi(PSR_EF), %l1; /* FPU enable is too high for andcc */ \
99 andcc %l0, %l1, %l0; /* %l0 = fpu enable bit */ \
100 be 1f; /* if not set, skip the saves */ \
101 rd %y, %l1; /* in any case, save %y */ \
102 /* fpu is enabled, oh well */ \
103 st %fsr, [%sp + CCFSZ + 0]; \
104 std %f0, [%sp + CCFSZ + 8]; \
105 std %f2, [%sp + CCFSZ + 16]; \
106 std %f4, [%sp + CCFSZ + 24]; \
107 std %f6, [%sp + CCFSZ + 32]; \
108 std %f8, [%sp + CCFSZ + 40]; \
109 std %f10, [%sp + CCFSZ + 48]; \
110 std %f12, [%sp + CCFSZ + 56]; \
111 std %f14, [%sp + CCFSZ + 64]; \
112 std %f16, [%sp + CCFSZ + 72]; \
113 std %f18, [%sp + CCFSZ + 80]; \
114 std %f20, [%sp + CCFSZ + 88]; \
115 std %f22, [%sp + CCFSZ + 96]; \
116 std %f24, [%sp + CCFSZ + 104]; \
117 std %f26, [%sp + CCFSZ + 112]; \
118 std %f28, [%sp + CCFSZ + 120]; \
119 std %f30, [%sp + CCFSZ + 128]; \
122 #define RESTORE_STATE \
124 * Now that the handler has returned, re-establish all the state \
125 * we just saved above, then do a sigreturn. \
127 tst %l0; /* reload fpu registers? */ \
128 be 1f; /* if not, skip the loads */ \
129 wr %l1, %g0, %y; /* in any case, restore %y */ \
130 ld [%sp + CCFSZ + 0], %fsr; \
131 ldd [%sp + CCFSZ + 8], %f0; \
132 ldd [%sp + CCFSZ + 16], %f2; \
133 ldd [%sp + CCFSZ + 24], %f4; \
134 ldd [%sp + CCFSZ + 32], %f6; \
135 ldd [%sp + CCFSZ + 40], %f8; \
136 ldd [%sp + CCFSZ + 48], %f10; \
137 ldd [%sp + CCFSZ + 56], %f12; \
138 ldd [%sp + CCFSZ + 64], %f14; \
139 ldd [%sp + CCFSZ + 72], %f16; \
140 ldd [%sp + CCFSZ + 80], %f18; \
141 ldd [%sp + CCFSZ + 88], %f20; \
142 ldd [%sp + CCFSZ + 96], %f22; \
143 ldd [%sp + CCFSZ + 104], %f24; \
144 ldd [%sp + CCFSZ + 112], %f26; \
145 ldd [%sp + CCFSZ + 120], %f28; \
146 ldd [%sp + CCFSZ + 128], %f30; \
155 ENTRY_NOPROFILE(__sigtramp_sigcontext_1)
158 ldd [%fp + 64], %o0 /* sig, code */
159 ld [%fp + 76], %o3 /* arg3 */
160 call %g1 /* call handler */
161 add %fp, 64 + 16, %o2 /* pointer to sigcontext */
165 /* Get registers back and set syscall # */
166 restore %g0, SYS_compat_16___sigreturn14, %g1
167 add %sp, 64 + 16, %o0 /* compute scp */
168 t ST_SYSCALL /* call sigreturn */
169 mov SYS_exit, %g1 /* exit with errno */
170 t ST_SYSCALL /* if sigreturn fails */