1 /* $NetBSD: compat___sigtramp1.S,v 1.2 2011/07/12 07:51:33 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1996-2002 Eduardo Horvath 5 * Copyright (c) 1996 Paul Kranenburg 6 * Copyright (c) 1996 7 * The President and Fellows of Harvard College. All rights reserved. 8 * Copyright (c) 1992, 1993 9 * The Regents of the University of California. All rights reserved. 10 * 11 * This software was developed by the Computer Systems Engineering group 12 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 13 * contributed to Berkeley. 14 * 15 * All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Lawrence Berkeley Laboratory. 19 * This product includes software developed by Harvard University. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 3. All advertising materials mentioning features or use of this software 30 * must display the following acknowledgement: 31 * This product includes software developed by Harvard University. 32 * This product includes software developed by Paul Kranenburg. 33 * 4. Neither the name of the University nor the names of its contributors 34 * may be used to endorse or promote products derived from this software 35 * without specific prior written permission. 36 * 37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 47 * SUCH DAMAGE. 48 */ 49 50 #include "SYS.h" 51 52 #define _LOCORE 53 #include <machine/frame.h> 54 #include <machine/fsr.h> 55 #include <machine/ctlreg.h> 56 #include <machine/psl.h> 57 58 .register %g2,#ignore 59 .register %g3,#ignore 60 61 #define BLOCK_SIZE SPARC64_BLOCK_SIZE 62 #define BLOCK_ALIGN SPARC64_BLOCK_ALIGN 63 64 /* 65 * When this code is run, the stack looks like: 66 * [%sp] 128 bytes to which registers can be dumped 67 * [%sp + 128] signal number (goes in %o0) 68 * [%sp + 128 + 4] signal code (goes in %o1) 69 * [%sp + 128 + 8] first word of saved state (sigcontext) 70 * . 71 * . 72 * . 73 * [%sp + NNN] last word of saved state 74 * (followed by previous stack contents or top of signal stack). 75 * The address of the function to call is in %g1; the old %g1 and %o0 76 * have already been saved in the sigcontext. We are running in a clean 77 * window, all previous windows now being saved to the stack. 78 * 79 * Note that [%sp + 128 + 8] == %sp + 128 + 16. The copy at %sp+128+8 80 * will eventually be removed, with a hole left in its place, if things 81 * work out. 82 */ 83 ENTRY_NOPROFILE(__sigtramp_sigcontext_1) 84 /* 85 * XXX the `save' and `restore' below are unnecessary: should 86 * replace with simple arithmetic on %sp 87 * 88 * Make room on the stack for 64 %f registers + %fsr. This comes 89 * out to 64*4+8 or 264 bytes, but this must be aligned to a multiple 90 * of 64, or 320 bytes. 91 */ 92 save %sp, -CC64FSZ - 320, %sp 93 mov %g2, %l2 /* save globals in %l registers */ 94 mov %g3, %l3 95 mov %g4, %l4 96 mov %g5, %l5 97 mov %g6, %l6 98 mov %g7, %l7 99 /* 100 * Saving the fpu registers is expensive, so do it iff it is 101 * enabled and dirty. 102 */ 103 rd %fprs, %l0 104 btst FPRS_DL|FPRS_DU, %l0 /* All clean? */ 105 bz,pt %icc, 2f 106 btst FPRS_DL, %l0 /* test dl */ 107 bz,pt %icc, 1f 108 btst FPRS_DU, %l0 /* test du */ 109 110 /* fpu is enabled, oh well */ 111 stx %fsr, [%sp + CC64FSZ + BIAS + 0] 112 add %sp, BIAS+CC64FSZ+BLOCK_SIZE, %l0 /* Generate a pointer so */ 113 andn %l0, BLOCK_ALIGN, %l0 /* we can do a block store */ 114 stda %f0, [%l0] ASI_BLK_P 115 inc BLOCK_SIZE, %l0 116 stda %f16, [%l0] ASI_BLK_P 117 1: 118 bz,pt %icc, 2f 119 add %sp, BIAS+CC64FSZ+BLOCK_SIZE, %l0 /* Generate a pointer so */ 120 andn %l0, BLOCK_ALIGN, %l0 /* we can do a block store */ 121 add %l0, 2*BLOCK_SIZE, %l0 /* and skip what we already stored */ 122 stda %f32, [%l0] ASI_BLK_P 123 inc BLOCK_SIZE, %l0 124 stda %f48, [%l0] ASI_BLK_P 125 2: 126 membar #Sync 127 rd %y, %l1 /* in any case, save %y */ 128 lduw [%fp + BIAS + 128], %o0 /* sig */ 129 lduw [%fp + BIAS + 128 + 4], %o1 /* code */ 130 call %g1 /* call handler */ 131 add %fp, BIAS + 128 + 8, %o2 /* scp */ 132 133 /* 134 * Now that the handler has returned, re-establish all the state 135 * we just saved above, then do a sigreturn. 136 */ 137 btst 3, %l0 /* All clean? */ 138 bz,pt %icc, 2f 139 btst 1, %l0 /* test dl */ 140 bz,pt %icc, 1f 141 btst 2, %l0 /* test du */ 142 143 ldx [%sp + CC64FSZ + BIAS + 0], %fsr 144 add %sp, BIAS+CC64FSZ+BLOCK_SIZE, %l0 /* Generate a pointer so */ 145 andn %l0, BLOCK_ALIGN, %l0 /* we can do a block load */ 146 ldda [%l0] ASI_BLK_P, %f0 147 inc BLOCK_SIZE, %l0 148 ldda [%l0] ASI_BLK_P, %f16 149 1: 150 bz,pt %icc, 2f 151 wr %l1, %g0, %y /* in any case, restore %y */ 152 add %sp, BIAS+CC64FSZ+BLOCK_SIZE, %l0 /* Generate a pointer so */ 153 andn %l0, BLOCK_ALIGN, %l0 /* we can do a block load */ 154 inc 2*BLOCK_SIZE, %l0 /* and skip what we already loaded */ 155 ldda [%l0] ASI_BLK_P, %f32 156 inc BLOCK_SIZE, %l0 157 ldda [%l0] ASI_BLK_P, %f48 158 2: 159 mov %l2, %g2 160 mov %l3, %g3 161 mov %l4, %g4 162 mov %l5, %g5 163 mov %l6, %g6 164 mov %l7, %g7 165 membar #Sync 166 167 /* get registers back and set syscall # */ 168 restore %g0, SYS_compat_16___sigreturn14, %g1 169 add %sp, BIAS + 128 + 8, %o0 /* compute scp */ 170 t ST_SYSCALL /* call sigreturn */ 171 mov SYS_exit, %g1 /* exit with errno */ 172 t ST_SYSCALL /* if sigreturn fails */ 173
Indexes created Sat Sep 20 22:09:52 GMT 2025