exception.S revision 1.1.2.3
1 1.1.2.3 thorpej /* $NetBSD: exception.S,v 1.1.2.3 2002/01/10 19:37:48 thorpej Exp $ */ 2 1.1.2.2 lukem 3 1.1.2.2 lukem /* 4 1.1.2.2 lukem * Copyright (c) 1994-1997 Mark Brinicombe. 5 1.1.2.2 lukem * Copyright (c) 1994 Brini. 6 1.1.2.2 lukem * All rights reserved. 7 1.1.2.2 lukem * 8 1.1.2.2 lukem * This code is derived from software written for Brini by Mark Brinicombe 9 1.1.2.2 lukem * 10 1.1.2.2 lukem * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 lukem * modification, are permitted provided that the following conditions 12 1.1.2.2 lukem * are met: 13 1.1.2.2 lukem * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 lukem * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 lukem * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 lukem * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 lukem * documentation and/or other materials provided with the distribution. 18 1.1.2.2 lukem * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 lukem * must display the following acknowledgement: 20 1.1.2.2 lukem * This product includes software developed by Brini. 21 1.1.2.2 lukem * 4. The name of the company nor the name of the author may be used to 22 1.1.2.2 lukem * endorse or promote products derived from this software without specific 23 1.1.2.2 lukem * prior written permission. 24 1.1.2.2 lukem * 25 1.1.2.2 lukem * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 1.1.2.2 lukem * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 1.1.2.2 lukem * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 1.1.2.2 lukem * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 1.1.2.2 lukem * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 1.1.2.2 lukem * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 1.1.2.2 lukem * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 1.1.2.2 lukem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 1.1.2.2 lukem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 1.1.2.2 lukem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 1.1.2.2 lukem * SUCH DAMAGE. 36 1.1.2.2 lukem * 37 1.1.2.2 lukem * RiscBSD kernel project 38 1.1.2.2 lukem * 39 1.1.2.2 lukem * exception.S 40 1.1.2.2 lukem * 41 1.1.2.2 lukem * Low level handlers for exception vectors 42 1.1.2.2 lukem * 43 1.1.2.2 lukem * Created : 24/09/94 44 1.1.2.2 lukem * 45 1.1.2.2 lukem * Based on kate/display/abort.s 46 1.1.2.2 lukem */ 47 1.1.2.2 lukem 48 1.1.2.2 lukem #include "opt_ipkdb.h" 49 1.1.2.2 lukem #include <machine/asm.h> 50 1.1.2.2 lukem #include <machine/cpu.h> 51 1.1.2.2 lukem #include <machine/frame.h> 52 1.1.2.2 lukem #include "assym.h" 53 1.1.2.2 lukem 54 1.1.2.2 lukem .text 55 1.1.2.2 lukem .align 0 56 1.1.2.2 lukem 57 1.1.2.2 lukem Lastpending: 58 1.1.2.2 lukem .word _C_LABEL(astpending) 59 1.1.2.2 lukem 60 1.1.2.2 lukem /* 61 1.1.2.2 lukem * General exception exit handler 62 1.1.2.2 lukem * 63 1.1.2.2 lukem * It exits straight away if not returning to USR mode. 64 1.1.2.2 lukem * This loops around delivering any pending ASTs. 65 1.1.2.2 lukem * Interrupts are disabled at suitable points to avoid ASTs 66 1.1.2.2 lukem * being posted between testing and exit to user mode. 67 1.1.2.2 lukem * 68 1.1.2.2 lukem * This function uses PULLFRAMEFROMSVCANDEXIT thus should 69 1.1.2.2 lukem * only be called if the exception handler used PUSHFRAMEINSVC 70 1.1.2.2 lukem */ 71 1.1.2.2 lukem 72 1.1.2.2 lukem exception_exit: 73 1.1.2.2 lukem mrs r4, cpsr_all /* Get CPSR */ 74 1.1.2.2 lukem 75 1.1.2.2 lukem ldr r0, [sp] /* Get the SPSR from stack */ 76 1.1.2.2 lukem and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the AST */ 77 1.1.2.2 lukem teq r0, #(PSR_USR32_MODE) 78 1.1.2.2 lukem bne do_exit /* Not USR mode so no AST delivery */ 79 1.1.2.2 lukem 80 1.1.2.2 lukem ldr r5, Lastpending /* Get address of astpending */ 81 1.1.2.2 lukem 82 1.1.2.2 lukem Lexception_exit_loop: 83 1.1.2.2 lukem orr r0, r4, #(I32_bit) /* Block IRQs */ 84 1.1.2.2 lukem msr cpsr_all, r0 85 1.1.2.2 lukem 86 1.1.2.2 lukem ldr r1, [r5] /* Do we have an AST pending */ 87 1.1.2.2 lukem teq r1, #0x00000000 88 1.1.2.2 lukem bne do_ast 89 1.1.2.2 lukem 90 1.1.2.2 lukem PULLFRAMEFROMSVCANDEXIT /* No AST so exit */ 91 1.1.2.2 lukem 92 1.1.2.2 lukem do_ast: 93 1.1.2.2 lukem mov r1, #0x00000000 /* Clear ast pending */ 94 1.1.2.2 lukem str r1, [r5] 95 1.1.2.2 lukem 96 1.1.2.3 thorpej msr cpsr_all, r4 /* Restore interrupts */ 97 1.1.2.3 thorpej 98 1.1.2.2 lukem mov r0, sp /* arg 0 = trap frame */ 99 1.1.2.2 lukem bl _C_LABEL(ast) /* call the AST handler */ 100 1.1.2.2 lukem b Lexception_exit_loop /* Try and exit again */ 101 1.1.2.2 lukem 102 1.1.2.2 lukem do_exit: 103 1.1.2.2 lukem orr r0, r4, #(I32_bit) /* Disable interupts */ 104 1.1.2.2 lukem msr cpsr_all, r0 105 1.1.2.2 lukem 106 1.1.2.2 lukem PULLFRAMEFROMSVCANDEXIT /* Restore the trap frame and exit */ 107 1.1.2.2 lukem 108 1.1.2.3 thorpej /* 109 1.1.2.3 thorpej * reset_entry: 110 1.1.2.3 thorpej * 111 1.1.2.3 thorpej * Handler for Reset exception. 112 1.1.2.3 thorpej */ 113 1.1.2.3 thorpej ASENTRY_NP(reset_entry) 114 1.1.2.3 thorpej adr r0, Lreset_panicmsg 115 1.1.2.3 thorpej mov r1, lr 116 1.1.2.3 thorpej bl _C_LABEL(panic) 117 1.1.2.3 thorpej /* NOTREACHED */ 118 1.1.2.3 thorpej Lreset_panicmsg: 119 1.1.2.3 thorpej .asciz "Reset vector called, LR = 0x%08x" 120 1.1.2.3 thorpej .balign 4 121 1.1.2.2 lukem 122 1.1.2.3 thorpej /* 123 1.1.2.3 thorpej * swi_entry 124 1.1.2.3 thorpej * 125 1.1.2.3 thorpej * Handler for the Software Interrupt exception. 126 1.1.2.3 thorpej */ 127 1.1.2.3 thorpej ASENTRY_NP(swi_entry) 128 1.1.2.3 thorpej PUSHFRAME 129 1.1.2.2 lukem 130 1.1.2.3 thorpej sub r0, lr, #0x00000004 /* Get the address of the SWI */ 131 1.1.2.3 thorpej ldr r4, [r0] /* Get the instruction */ 132 1.1.2.2 lukem 133 1.1.2.3 thorpej bic r1, r4, #0xff000000 /* Extract the comment field */ 134 1.1.2.2 lukem 135 1.1.2.3 thorpej mov r0, sp /* Pass the frame to any function */ 136 1.1.2.2 lukem 137 1.1.2.3 thorpej bl _C_LABEL(syscall) /* It's a syscall ! */ 138 1.1.2.2 lukem 139 1.1.2.3 thorpej ldr r5, Lastpending /* Get address of astpending */ 140 1.1.2.3 thorpej mrs r4, cpsr_all /* Get CPSR */ 141 1.1.2.2 lukem 142 1.1.2.3 thorpej swi_exit_loop: 143 1.1.2.3 thorpej orr r0, r4, #(I32_bit) /* Disable IRQs */ 144 1.1.2.3 thorpej msr cpsr_all, r0 145 1.1.2.2 lukem 146 1.1.2.3 thorpej ldr r1, [r5] /* Do we have an AST pending */ 147 1.1.2.3 thorpej teq r1, #0x00000000 148 1.1.2.3 thorpej bne do_swi_ast 149 1.1.2.2 lukem 150 1.1.2.3 thorpej PULLFRAME 151 1.1.2.3 thorpej movs pc, lr /* Exit */ 152 1.1.2.3 thorpej 153 1.1.2.3 thorpej do_swi_ast: 154 1.1.2.3 thorpej mov r1, #0x00000000 /* Clear ast pending */ 155 1.1.2.3 thorpej str r1, [r5] 156 1.1.2.2 lukem 157 1.1.2.3 thorpej msr cpsr_all, r4 /* Restore interrupts */ 158 1.1.2.2 lukem 159 1.1.2.3 thorpej mov r0, sp /* arg 0 = trap frame */ 160 1.1.2.3 thorpej bl _C_LABEL(ast) /* call the AST handler */ 161 1.1.2.3 thorpej b swi_exit_loop /* Try and exit again */ 162 1.1.2.3 thorpej 163 1.1.2.3 thorpej /* 164 1.1.2.3 thorpej * prefetch_abort_entry: 165 1.1.2.3 thorpej * 166 1.1.2.3 thorpej * Handler for the Prefetch Abort exception. 167 1.1.2.3 thorpej */ 168 1.1.2.2 lukem ASENTRY_NP(prefetch_abort_entry) 169 1.1.2.2 lukem sub lr, lr, #0x00000004 /* Adjust the lr */ 170 1.1.2.2 lukem 171 1.1.2.2 lukem PUSHFRAMEINSVC 172 1.1.2.2 lukem 173 1.1.2.2 lukem mov r0, sp /* pass the stack pointer as r0 */ 174 1.1.2.2 lukem 175 1.1.2.2 lukem add lr, pc, #exception_exit - . - 8 176 1.1.2.2 lukem ldr r1, Lprefetch_abort_handler_address 177 1.1.2.2 lukem ldr pc, [r1] 178 1.1.2.2 lukem 179 1.1.2.2 lukem Lprefetch_abort_handler_address: 180 1.1.2.2 lukem .word _C_LABEL(prefetch_abort_handler_address) 181 1.1.2.2 lukem 182 1.1.2.2 lukem .data 183 1.1.2.2 lukem .global _C_LABEL(prefetch_abort_handler_address) 184 1.1.2.2 lukem 185 1.1.2.2 lukem _C_LABEL(prefetch_abort_handler_address): 186 1.1.2.2 lukem .word abortprefetch 187 1.1.2.2 lukem 188 1.1.2.2 lukem .text 189 1.1.2.2 lukem abortprefetch: 190 1.1.2.2 lukem add r0, pc, #abortprefetchmsg - . - 8 191 1.1.2.2 lukem b _C_LABEL(panic) 192 1.1.2.2 lukem 193 1.1.2.2 lukem abortprefetchmsg: 194 1.1.2.2 lukem .asciz "abortprefetch" 195 1.1.2.2 lukem .align 0 196 1.1.2.2 lukem 197 1.1.2.2 lukem /* 198 1.1.2.3 thorpej * data_abort_entry: 199 1.1.2.2 lukem * 200 1.1.2.3 thorpej * Handler for the Data Abort exception. 201 1.1.2.2 lukem */ 202 1.1.2.3 thorpej ASENTRY_NP(data_abort_entry) 203 1.1.2.3 thorpej sub lr, lr, #0x00000008 /* Adjust the lr */ 204 1.1.2.2 lukem 205 1.1.2.3 thorpej PUSHFRAMEINSVC /* Push trap frame and switch */ 206 1.1.2.3 thorpej /* to SVC32 mode */ 207 1.1.2.2 lukem 208 1.1.2.3 thorpej mov r0, sp /* pass the stack pointer as r0 */ 209 1.1.2.2 lukem 210 1.1.2.3 thorpej add lr, pc, #exception_exit - . - 8 211 1.1.2.3 thorpej ldr r1, Ldata_abort_handler_address 212 1.1.2.3 thorpej ldr pc, [r1] 213 1.1.2.2 lukem 214 1.1.2.3 thorpej Ldata_abort_handler_address: 215 1.1.2.3 thorpej .word _C_LABEL(data_abort_handler_address) 216 1.1.2.2 lukem 217 1.1.2.3 thorpej .data 218 1.1.2.3 thorpej .global _C_LABEL(data_abort_handler_address) 219 1.1.2.3 thorpej _C_LABEL(data_abort_handler_address): 220 1.1.2.3 thorpej .word abortdata 221 1.1.2.2 lukem 222 1.1.2.3 thorpej .text 223 1.1.2.3 thorpej abortdata: 224 1.1.2.3 thorpej add r0, pc, #abortdatamsg - . - 8 225 1.1.2.3 thorpej b _C_LABEL(panic) 226 1.1.2.2 lukem 227 1.1.2.3 thorpej abortdatamsg: 228 1.1.2.3 thorpej .asciz "abortdata" 229 1.1.2.3 thorpej .align 0 230 1.1.2.2 lukem 231 1.1.2.2 lukem /* 232 1.1.2.3 thorpej * address_exception_entry: 233 1.1.2.3 thorpej * 234 1.1.2.3 thorpej * Handler for the Address Exception exception. 235 1.1.2.3 thorpej * 236 1.1.2.3 thorpej * NOTE: This exception isn't really used on arm32. We 237 1.1.2.3 thorpej * print a warning message to the console and then treat 238 1.1.2.3 thorpej * it like a Data Abort. 239 1.1.2.2 lukem */ 240 1.1.2.3 thorpej ASENTRY_NP(address_exception_entry) 241 1.1.2.3 thorpej mrs r1, cpsr_all 242 1.1.2.3 thorpej mrs r2, spsr_all 243 1.1.2.3 thorpej mov r3, lr 244 1.1.2.3 thorpej adr r0, Laddress_exception_msg 245 1.1.2.3 thorpej bl _C_LABEL(printf) /* XXX CLOBBERS LR!! */ 246 1.1.2.3 thorpej b data_abort_entry 247 1.1.2.3 thorpej Laddress_exception_msg: 248 1.1.2.3 thorpej .asciz "Address Exception CPSR=0x%08x SPSR=0x%08x LR=0x%08x\n" 249 1.1.2.3 thorpej .balign 4 250 1.1.2.2 lukem 251 1.1.2.3 thorpej /* 252 1.1.2.3 thorpej * undefined_entry: 253 1.1.2.3 thorpej * 254 1.1.2.3 thorpej * Handler for the Undefined Instruction exception. 255 1.1.2.3 thorpej * 256 1.1.2.3 thorpej * We indirect the undefined vector via the handler address 257 1.1.2.3 thorpej * in the data area. Entry to the undefined handler must 258 1.1.2.3 thorpej * look like direct entry from the vector. 259 1.1.2.3 thorpej */ 260 1.1.2.2 lukem ASENTRY_NP(undefined_entry) 261 1.1.2.2 lukem #ifdef IPKDB 262 1.1.2.2 lukem /* 263 1.1.2.2 lukem * IPKDB must be hooked in at the earliest possible entry point. 264 1.1.2.2 lukem * 265 1.1.2.2 lukem */ 266 1.1.2.2 lukem /* 267 1.1.2.2 lukem * Make room for all registers saving real r0-r7 and r15. 268 1.1.2.2 lukem * The remaining registers are updated later. 269 1.1.2.2 lukem */ 270 1.1.2.2 lukem stmfd sp!, {r0,r1} /* psr & spsr */ 271 1.1.2.2 lukem stmfd sp!, {lr} /* pc */ 272 1.1.2.2 lukem stmfd sp!, {r0-r14} /* r0-r7, r8-r14 */ 273 1.1.2.2 lukem /* 274 1.1.2.2 lukem * Get previous psr. 275 1.1.2.2 lukem */ 276 1.1.2.2 lukem mrs r7, cpsr_all 277 1.1.2.2 lukem mrs r0, spsr_all 278 1.1.2.2 lukem str r0, [sp, #(16*4)] 279 1.1.2.2 lukem /* 280 1.1.2.2 lukem * Test for user mode. 281 1.1.2.2 lukem */ 282 1.1.2.2 lukem tst r0, #0xf 283 1.1.2.2 lukem bne Lprenotuser_push 284 1.1.2.2 lukem add r1, sp, #(8*4) 285 1.1.2.2 lukem stmia r1,{r8-r14}^ /* store user mode r8-r14*/ 286 1.1.2.2 lukem b Lgoipkdb 287 1.1.2.2 lukem /* 288 1.1.2.2 lukem * Switch to previous mode to get r8-r13. 289 1.1.2.2 lukem */ 290 1.1.2.2 lukem Lprenotuser_push: 291 1.1.2.2 lukem orr r0, r0, #(I32_bit) /* disable interrupts */ 292 1.1.2.2 lukem msr cpsr_all, r0 293 1.1.2.2 lukem mov r1, r8 294 1.1.2.2 lukem mov r2, r9 295 1.1.2.2 lukem mov r3, r10 296 1.1.2.2 lukem mov r4, r11 297 1.1.2.2 lukem mov r5, r12 298 1.1.2.2 lukem mov r6, r13 299 1.1.2.2 lukem msr cpsr_all, r7 /* back to undefined mode */ 300 1.1.2.2 lukem add r8, sp, #(8*4) 301 1.1.2.2 lukem stmia r8, {r1-r6} /* r8-r13 */ 302 1.1.2.2 lukem /* 303 1.1.2.2 lukem * Now back to previous mode to get r14 and spsr. 304 1.1.2.2 lukem */ 305 1.1.2.2 lukem msr cpsr_all, r0 306 1.1.2.2 lukem mov r1, r14 307 1.1.2.2 lukem mrs r2, spsr 308 1.1.2.2 lukem msr cpsr_all, r7 /* back to undefined mode */ 309 1.1.2.2 lukem str r1, [sp, #(14*4)] /* r14 */ 310 1.1.2.2 lukem str r2, [sp, #(17*4)] /* spsr */ 311 1.1.2.2 lukem /* 312 1.1.2.2 lukem * Now to IPKDB. 313 1.1.2.2 lukem */ 314 1.1.2.2 lukem Lgoipkdb: 315 1.1.2.2 lukem mov r0, sp 316 1.1.2.2 lukem bl _C_LABEL(ipkdb_trap_glue) 317 1.1.2.2 lukem ldr r1, Lipkdb_trap_return 318 1.1.2.2 lukem str r0,[r1] 319 1.1.2.2 lukem /* 320 1.1.2.2 lukem * Have to load all registers from the stack. 321 1.1.2.2 lukem * 322 1.1.2.2 lukem * Start with spsr and pc. 323 1.1.2.2 lukem */ 324 1.1.2.2 lukem ldr r0, [sp, #(16*4)] /* spsr */ 325 1.1.2.2 lukem ldr r1, [sp, #(15*4)] /* r15 */ 326 1.1.2.2 lukem msr spsr_all, r0 327 1.1.2.2 lukem mov r14, r1 328 1.1.2.2 lukem /* 329 1.1.2.2 lukem * Test for user mode. 330 1.1.2.2 lukem */ 331 1.1.2.2 lukem tst r0, #0xf 332 1.1.2.2 lukem bne Lprenotuser_pull 333 1.1.2.2 lukem add r1, sp, #(8*4) 334 1.1.2.2 lukem ldmia r1, {r8-r14}^ /* load user mode r8-r14 */ 335 1.1.2.2 lukem b Lpull_r0r7 336 1.1.2.2 lukem Lprenotuser_pull: 337 1.1.2.2 lukem /* 338 1.1.2.2 lukem * Now previous mode spsr and r14. 339 1.1.2.2 lukem */ 340 1.1.2.2 lukem ldr r1, [sp, #(17*4)] /* spsr */ 341 1.1.2.2 lukem ldr r2, [sp, #(14*4)] /* r14 */ 342 1.1.2.2 lukem orr r0, r0, #(I32_bit) 343 1.1.2.2 lukem msr cpsr_all, r0 /* switch to previous mode */ 344 1.1.2.2 lukem msr spsr_all, r1 345 1.1.2.2 lukem mov r14, r2 346 1.1.2.2 lukem msr cpsr_all, r7 /* back to undefined mode */ 347 1.1.2.2 lukem /* 348 1.1.2.2 lukem * Now r8-r13. 349 1.1.2.2 lukem */ 350 1.1.2.2 lukem add r8, sp, #(8*4) 351 1.1.2.2 lukem ldmia r8, {r1-r6} /* r8-r13 */ 352 1.1.2.2 lukem msr cpsr_all, r0 353 1.1.2.2 lukem mov r8, r1 354 1.1.2.2 lukem mov r9, r2 355 1.1.2.2 lukem mov r10, r3 356 1.1.2.2 lukem mov r11, r4 357 1.1.2.2 lukem mov r12, r5 358 1.1.2.2 lukem mov r13, r6 359 1.1.2.2 lukem msr cpsr_all, r7 360 1.1.2.2 lukem Lpull_r0r7: 361 1.1.2.2 lukem /* 362 1.1.2.2 lukem * Now the rest of the registers. 363 1.1.2.2 lukem */ 364 1.1.2.2 lukem ldr r1,Lipkdb_trap_return 365 1.1.2.2 lukem ldr r0,[r1] 366 1.1.2.2 lukem tst r0,r0 367 1.1.2.2 lukem ldmfd sp!, {r0-r7} /* r0-r7 */ 368 1.1.2.2 lukem add sp, sp, #(10*4) /* adjust sp */ 369 1.1.2.2 lukem 370 1.1.2.2 lukem /* 371 1.1.2.2 lukem * Did IPKDB handle it? 372 1.1.2.2 lukem */ 373 1.1.2.2 lukem movnes pc, lr /* return */ 374 1.1.2.2 lukem 375 1.1.2.2 lukem #endif 376 1.1.2.2 lukem stmfd sp!, {r0, r1} 377 1.1.2.2 lukem ldr r0, Lundefined_handler_indirection 378 1.1.2.2 lukem ldr r1, [sp], #0x0004 379 1.1.2.2 lukem str r1, [r0, #0x0000] 380 1.1.2.2 lukem ldr r1, [sp], #0x0004 381 1.1.2.2 lukem str r1, [r0, #0x0004] 382 1.1.2.2 lukem ldmia r0, {r0, r1, pc} 383 1.1.2.2 lukem 384 1.1.2.2 lukem #ifdef IPKDB 385 1.1.2.2 lukem Lipkdb_trap_return: 386 1.1.2.2 lukem .word Lipkdb_trap_return_data 387 1.1.2.2 lukem #endif 388 1.1.2.2 lukem 389 1.1.2.2 lukem Lundefined_handler_indirection: 390 1.1.2.2 lukem .word Lundefined_handler_indirection_data 391 1.1.2.2 lukem 392 1.1.2.2 lukem /* 393 1.1.2.2 lukem * assembly bounce code for calling the kernel 394 1.1.2.2 lukem * undefined instruction handler. This uses 395 1.1.2.2 lukem * a standard trap frame and is called in SVC mode. 396 1.1.2.2 lukem */ 397 1.1.2.2 lukem 398 1.1.2.2 lukem ENTRY_NP(undefinedinstruction_bounce) 399 1.1.2.2 lukem PUSHFRAMEINSVC 400 1.1.2.2 lukem mov r0, sp 401 1.1.2.2 lukem bl _C_LABEL(undefinedinstruction) 402 1.1.2.2 lukem 403 1.1.2.2 lukem b exception_exit 404 1.1.2.2 lukem 405 1.1.2.2 lukem .data 406 1.1.2.2 lukem .align 0 407 1.1.2.2 lukem 408 1.1.2.2 lukem #ifdef IPKDB 409 1.1.2.2 lukem Lipkdb_trap_return_data: 410 1.1.2.2 lukem .word 0 411 1.1.2.2 lukem #endif 412 1.1.2.2 lukem 413 1.1.2.2 lukem /* 414 1.1.2.2 lukem * Indirection data 415 1.1.2.2 lukem * 2 words use for preserving r0 and r1 416 1.1.2.2 lukem * 3rd word contains the undefined handler address. 417 1.1.2.2 lukem */ 418 1.1.2.2 lukem 419 1.1.2.2 lukem Lundefined_handler_indirection_data: 420 1.1.2.2 lukem .word 0 421 1.1.2.2 lukem .word 0 422 1.1.2.2 lukem 423 1.1.2.2 lukem .global _C_LABEL(undefined_handler_address) 424 1.1.2.2 lukem _C_LABEL(undefined_handler_address): 425 1.1.2.2 lukem .word _C_LABEL(undefinedinstruction_bounce) 426
Indexes created Thu Oct 02 14:10:14 GMT 2025