1 /* $NetBSD: compat___sigtramp1.S,v 1.1 2005/10/15 22:11:22 uwe Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Paul Kranenburg 5 * Copyright (c) 1996 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. 9 * 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. 13 * 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. 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 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. 35 * 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 46 * SUCH DAMAGE. 47 */ 48 49 #include "SYS.h" 50 51 #define _LOCORE 52 #include <machine/frame.h> 53 #include <machine/psl.h> 54 #include <machine/signal.h> 55 56 /* 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) 64 * . 65 * . 66 * . 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. 72 * 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 75 * work out. 76 */ 77 #define SAVE_STATE \ 78 /* \ 79 * XXX the `save' and `restore' below are unnecessary: should \ 80 * replace with simple arithmetic on %sp \ 81 * \ 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. \ 85 */ \ 86 save %sp, -CCFSZ - 136, %sp; \ 87 mov %g2, %l2; /* save globals in %l registers */ \ 88 mov %g3, %l3; \ 89 mov %g4, %l4; \ 90 mov %g5, %l5; \ 91 mov %g6, %l6; \ 92 mov %g7, %l7; \ 93 /* \ 94 * Saving the fpu registers is expensive, so do it iff the fsr \ 95 * stored in the sigcontext shows that the fpu is enabled. \ 96 */ \ 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]; \ 120 1: 121 122 #define RESTORE_STATE \ 123 /* \ 124 * Now that the handler has returned, re-establish all the state \ 125 * we just saved above, then do a sigreturn. \ 126 */ \ 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; \ 147 1: \ 148 mov %l2, %g2; \ 149 mov %l3, %g3; \ 150 mov %l4, %g4; \ 151 mov %l5, %g5; \ 152 mov %l6, %g6; \ 153 mov %l7, %g7 154 155 ENTRY_NOPROFILE(__sigtramp_sigcontext_1) 156 SAVE_STATE 157 158 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 */ 162 163 RESTORE_STATE 164 165 /* 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 */ 171
Indexes created Sat Sep 20 22:09:52 GMT 2025