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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 | /* * fp_emu.S * * Copyright Roman Zippel, 1997. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, and the entire permission notice in its entirety, * including the disclaimer of warranties. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote * products derived from this software without specific prior * written permission. * * ALTERNATIVELY, this product may be distributed under the terms of * the GNU Public License, in which case the provisions of the GPL are * required INSTEAD OF the above restrictions. (This clause is * necessary due to a potential bad interaction between the GPL and * the restrictions contained in a BSD-style copyright.) * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <linux/config.h> #include <linux/linkage.h> #include <asm/entry.h> #include "fp_emu.h" .globl SYMBOL_NAME(fpu_emu) .globl fp_debugprint .globl fp_err_ua1,fp_err_ua2 .text SYMBOL_NAME_LABEL(fpu_emu) SAVE_ALL_INT GET_CURRENT(%d0) #if defined(CPU_M68020_OR_M68030) && defined(CPU_M68040_OR_M68060) tst.l SYMBOL_NAME(m68k_is040or060) jeq 1f #endif #if defined(CPU_M68040_OR_M68060) move.l (FPS_PC2,%sp),(FPS_PC,%sp) #endif 1: | emulate the instruction jsr fp_scan #if defined(CONFIG_M68060) #if !defined(CPU_M68060_ONLY) btst #3,SYMBOL_NAME(m68k_cputype)+3 jeq 1f #endif btst #7,(FPS_SR,%sp) jne fp_sendtrace060 #endif 1: | emulation successful? tst.l %d0 jeq SYMBOL_NAME(ret_from_exception) | send some signal to program here jra SYMBOL_NAME(ret_from_exception) | we jump here after an access error while trying to access | user space, we correct stackpointer and send a SIGSEGV to | the user process fp_err_ua2: addq.l #4,%sp fp_err_ua1: addq.l #4,%sp move.l %a0,-(%sp) pea SEGV_MAPERR pea SIGSEGV jsr SYMBOL_NAME(fpemu_signal) add.w #12,%sp jra SYMBOL_NAME(ret_from_exception) #if defined(CONFIG_M68060) | send a trace signal if we are debugged | it does not really belong here, but... fp_sendtrace060: move.l (FPS_PC,%sp),-(%sp) pea TRAP_TRACE pea SIGTRAP jsr SYMBOL_NAME(fpemu_signal) add.w #12,%sp jra SYMBOL_NAME(ret_from_exception) #endif .globl fp_get_data_reg, fp_put_data_reg .globl fp_get_addr_reg, fp_put_addr_reg | Entry points to get/put a register. Some of them can be get/put | directly, others are on the stack, as we read/write the stack | directly here, these function may only be called from within | instruction decoding, otherwise the stack pointer is incorrect | and the stack gets corrupted. fp_get_data_reg: jmp ([0f:w,%pc,%d0.w*4]) .align 4 0: .long fp_get_d0, fp_get_d1 .long fp_get_d2, fp_get_d3 .long fp_get_d4, fp_get_d5 .long fp_get_d6, fp_get_d7 fp_get_d0: move.l (PT_D0+8,%sp),%d0 printf PREGISTER,"{d0->%08x}",1,%d0 rts fp_get_d1: move.l (PT_D1+8,%sp),%d0 printf PREGISTER,"{d1->%08x}",1,%d0 rts fp_get_d2: move.l (PT_D2+8,%sp),%d0 printf PREGISTER,"{d2->%08x}",1,%d0 rts fp_get_d3: move.l %d3,%d0 printf PREGISTER,"{d3->%08x}",1,%d0 rts fp_get_d4: move.l %d4,%d0 printf PREGISTER,"{d4->%08x}",1,%d0 rts fp_get_d5: move.l %d5,%d0 printf PREGISTER,"{d5->%08x}",1,%d0 rts fp_get_d6: move.l %d6,%d0 printf PREGISTER,"{d6->%08x}",1,%d0 rts fp_get_d7: move.l %d7,%d0 printf PREGISTER,"{d7->%08x}",1,%d0 rts fp_put_data_reg: jmp ([0f:w,%pc,%d1.w*4]) .align 4 0: .long fp_put_d0, fp_put_d1 .long fp_put_d2, fp_put_d3 .long fp_put_d4, fp_put_d5 .long fp_put_d6, fp_put_d7 fp_put_d0: printf PREGISTER,"{d0<-%08x}",1,%d0 move.l %d0,(PT_D0+8,%sp) rts fp_put_d1: printf PREGISTER,"{d1<-%08x}",1,%d0 move.l %d0,(PT_D1+8,%sp) rts fp_put_d2: printf PREGISTER,"{d2<-%08x}",1,%d0 move.l %d0,(PT_D2+8,%sp) rts fp_put_d3: printf PREGISTER,"{d3<-%08x}",1,%d0 | move.l %d0,%d3 move.l %d0,(PT_D3+8,%sp) rts fp_put_d4: printf PREGISTER,"{d4<-%08x}",1,%d0 | move.l %d0,%d4 move.l %d0,(PT_D4+8,%sp) rts fp_put_d5: printf PREGISTER,"{d5<-%08x}",1,%d0 | move.l %d0,%d5 move.l %d0,(PT_D5+8,%sp) rts fp_put_d6: printf PREGISTER,"{d6<-%08x}",1,%d0 move.l %d0,%d6 rts fp_put_d7: printf PREGISTER,"{d7<-%08x}",1,%d0 move.l %d0,%d7 rts fp_get_addr_reg: jmp ([0f:w,%pc,%d0.w*4]) .align 4 0: .long fp_get_a0, fp_get_a1 .long fp_get_a2, fp_get_a3 .long fp_get_a4, fp_get_a5 .long fp_get_a6, fp_get_a7 fp_get_a0: move.l (PT_A0+8,%sp),%a0 printf PREGISTER,"{a0->%08x}",1,%a0 rts fp_get_a1: move.l (PT_A1+8,%sp),%a0 printf PREGISTER,"{a1->%08x}",1,%a0 rts fp_get_a2: move.l (PT_A2+8,%sp),%a0 printf PREGISTER,"{a2->%08x}",1,%a0 rts fp_get_a3: move.l %a3,%a0 printf PREGISTER,"{a3->%08x}",1,%a0 rts fp_get_a4: move.l %a4,%a0 printf PREGISTER,"{a4->%08x}",1,%a0 rts fp_get_a5: move.l %a5,%a0 printf PREGISTER,"{a5->%08x}",1,%a0 rts fp_get_a6: move.l %a6,%a0 printf PREGISTER,"{a6->%08x}",1,%a0 rts fp_get_a7: move.l %usp,%a0 printf PREGISTER,"{a7->%08x}",1,%a0 rts fp_put_addr_reg: jmp ([0f:w,%pc,%d0.w*4]) .align 4 0: .long fp_put_a0, fp_put_a1 .long fp_put_a2, fp_put_a3 .long fp_put_a4, fp_put_a5 .long fp_put_a6, fp_put_a7 fp_put_a0: printf PREGISTER,"{a0<-%08x}",1,%a0 move.l %a0,(PT_A0+8,%sp) rts fp_put_a1: printf PREGISTER,"{a1<-%08x}",1,%a0 move.l %a0,(PT_A1+8,%sp) rts fp_put_a2: printf PREGISTER,"{a2<-%08x}",1,%a0 move.l %a0,(PT_A2+8,%sp) rts fp_put_a3: printf PREGISTER,"{a3<-%08x}",1,%a0 move.l %a0,%a3 rts fp_put_a4: printf PREGISTER,"{a4<-%08x}",1,%a0 move.l %a0,%a4 rts fp_put_a5: printf PREGISTER,"{a5<-%08x}",1,%a0 move.l %a0,%a5 rts fp_put_a6: printf PREGISTER,"{a6<-%08x}",1,%a0 move.l %a0,%a6 rts fp_put_a7: printf PREGISTER,"{a7<-%08x}",1,%a0 move.l %a0,%usp rts .data .align 4 fp_debugprint: | .long PMDECODE .long PMINSTR+PMDECODE+PMCONV+PMNORM | .long PMCONV+PMNORM+PMINSTR | .long 0 |