projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| e94e6682 AJ |
2 | /* |
| 3 | * Port on Texas Instruments TMS320C6x architecture | |
| 4 | * | |
| 5 | * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated | |
| 6 | * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) | |
| e94e6682 AJ |
7 | */ |
| 8 | #include <linux/module.h> | |
| 9 | #include <linux/ptrace.h> | |
| b17b0153 | 10 | #include <linux/sched/debug.h> |
| e94e6682 AJ |
11 | #include <linux/bug.h> |
| 12 | ||
| 13 | #include <asm/soc.h> | |
| 6a846f3f | 14 | #include <asm/special_insns.h> |
| e94e6682 AJ |
15 | #include <asm/traps.h> |
| 16 | ||
| 17 | int (*c6x_nmi_handler)(struct pt_regs *regs); | |
| 18 | ||
| 19 | void __init trap_init(void) | |
| 20 | { | |
| 21 | ack_exception(EXCEPT_TYPE_NXF); | |
| 22 | ack_exception(EXCEPT_TYPE_EXC); | |
| 23 | ack_exception(EXCEPT_TYPE_IXF); | |
| 24 | ack_exception(EXCEPT_TYPE_SXF); | |
| 25 | enable_exception(); | |
| 26 | } | |
| 27 | ||
| 28 | void show_regs(struct pt_regs *regs) | |
| 29 | { | |
| 30 | pr_err("\n"); | |
| a43cb95d | 31 | show_regs_print_info(KERN_ERR); |
| e94e6682 AJ |
32 | pr_err("PC: %08lx SP: %08lx\n", regs->pc, regs->sp); |
| 33 | pr_err("Status: %08lx ORIG_A4: %08lx\n", regs->csr, regs->orig_a4); | |
| 34 | pr_err("A0: %08lx B0: %08lx\n", regs->a0, regs->b0); | |
| 35 | pr_err("A1: %08lx B1: %08lx\n", regs->a1, regs->b1); | |
| 36 | pr_err("A2: %08lx B2: %08lx\n", regs->a2, regs->b2); | |
| 37 | pr_err("A3: %08lx B3: %08lx\n", regs->a3, regs->b3); | |
| 38 | pr_err("A4: %08lx B4: %08lx\n", regs->a4, regs->b4); | |
| 39 | pr_err("A5: %08lx B5: %08lx\n", regs->a5, regs->b5); | |
| 40 | pr_err("A6: %08lx B6: %08lx\n", regs->a6, regs->b6); | |
| 41 | pr_err("A7: %08lx B7: %08lx\n", regs->a7, regs->b7); | |
| 42 | pr_err("A8: %08lx B8: %08lx\n", regs->a8, regs->b8); | |
| 43 | pr_err("A9: %08lx B9: %08lx\n", regs->a9, regs->b9); | |
| 44 | pr_err("A10: %08lx B10: %08lx\n", regs->a10, regs->b10); | |
| 45 | pr_err("A11: %08lx B11: %08lx\n", regs->a11, regs->b11); | |
| 46 | pr_err("A12: %08lx B12: %08lx\n", regs->a12, regs->b12); | |
| 47 | pr_err("A13: %08lx B13: %08lx\n", regs->a13, regs->b13); | |
| 48 | pr_err("A14: %08lx B14: %08lx\n", regs->a14, regs->dp); | |
| 49 | pr_err("A15: %08lx B15: %08lx\n", regs->a15, regs->sp); | |
| 50 | pr_err("A16: %08lx B16: %08lx\n", regs->a16, regs->b16); | |
| 51 | pr_err("A17: %08lx B17: %08lx\n", regs->a17, regs->b17); | |
| 52 | pr_err("A18: %08lx B18: %08lx\n", regs->a18, regs->b18); | |
| 53 | pr_err("A19: %08lx B19: %08lx\n", regs->a19, regs->b19); | |
| 54 | pr_err("A20: %08lx B20: %08lx\n", regs->a20, regs->b20); | |
| 55 | pr_err("A21: %08lx B21: %08lx\n", regs->a21, regs->b21); | |
| 56 | pr_err("A22: %08lx B22: %08lx\n", regs->a22, regs->b22); | |
| 57 | pr_err("A23: %08lx B23: %08lx\n", regs->a23, regs->b23); | |
| 58 | pr_err("A24: %08lx B24: %08lx\n", regs->a24, regs->b24); | |
| 59 | pr_err("A25: %08lx B25: %08lx\n", regs->a25, regs->b25); | |
| 60 | pr_err("A26: %08lx B26: %08lx\n", regs->a26, regs->b26); | |
| 61 | pr_err("A27: %08lx B27: %08lx\n", regs->a27, regs->b27); | |
| 62 | pr_err("A28: %08lx B28: %08lx\n", regs->a28, regs->b28); | |
| 63 | pr_err("A29: %08lx B29: %08lx\n", regs->a29, regs->b29); | |
| 64 | pr_err("A30: %08lx B30: %08lx\n", regs->a30, regs->b30); | |
| 65 | pr_err("A31: %08lx B31: %08lx\n", regs->a31, regs->b31); | |
| 66 | } | |
| 67 | ||
| e94e6682 AJ |
68 | void die(char *str, struct pt_regs *fp, int nr) |
| 69 | { | |
| 70 | console_verbose(); | |
| 71 | pr_err("%s: %08x\n", str, nr); | |
| 72 | show_regs(fp); | |
| 73 | ||
| 74 | pr_err("Process %s (pid: %d, stackpage=%08lx)\n", | |
| 75 | current->comm, current->pid, (PAGE_SIZE + | |
| 76 | (unsigned long) current)); | |
| 77 | ||
| 78 | dump_stack(); | |
| 79 | while (1) | |
| 80 | ; | |
| 81 | } | |
| 82 | ||
| 83 | static void die_if_kernel(char *str, struct pt_regs *fp, int nr) | |
| 84 | { | |
| 85 | if (user_mode(fp)) | |
| 86 | return; | |
| 87 | ||
| 88 | die(str, fp, nr); | |
| 89 | } | |
| 90 | ||
| 91 | ||
| 92 | /* Internal exceptions */ | |
| 93 | static struct exception_info iexcept_table[10] = { | |
| 94 | { "Oops - instruction fetch", SIGBUS, BUS_ADRERR }, | |
| 95 | { "Oops - fetch packet", SIGBUS, BUS_ADRERR }, | |
| 96 | { "Oops - execute packet", SIGILL, ILL_ILLOPC }, | |
| 97 | { "Oops - undefined instruction", SIGILL, ILL_ILLOPC }, | |
| 98 | { "Oops - resource conflict", SIGILL, ILL_ILLOPC }, | |
| 99 | { "Oops - resource access", SIGILL, ILL_PRVREG }, | |
| 100 | { "Oops - privilege", SIGILL, ILL_PRVOPC }, | |
| 101 | { "Oops - loops buffer", SIGILL, ILL_ILLOPC }, | |
| 102 | { "Oops - software exception", SIGILL, ILL_ILLTRP }, | |
| 103 | { "Oops - unknown exception", SIGILL, ILL_ILLOPC } | |
| 104 | }; | |
| 105 | ||
| 106 | /* External exceptions */ | |
| 107 | static struct exception_info eexcept_table[128] = { | |
| 108 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 109 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 110 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 111 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 112 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 113 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 114 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 115 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 116 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 117 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 118 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 119 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 120 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 121 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 122 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 123 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 124 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 125 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 126 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 127 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 128 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 129 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 130 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 131 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 132 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 133 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 134 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 135 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 136 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 137 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 138 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 139 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 140 | ||
| 141 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 142 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 143 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 144 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 145 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 146 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 147 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 148 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 149 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 150 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 151 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 152 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 153 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 154 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 155 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 156 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 157 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 158 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 159 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 160 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 161 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 162 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 163 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 164 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 165 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 166 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 167 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 168 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 169 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 170 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 171 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 172 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 173 | ||
| 174 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 175 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 176 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 177 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 178 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 179 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 180 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 181 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 182 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 183 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 184 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 185 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 186 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 187 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 188 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 189 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 190 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 191 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 192 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 193 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 194 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 195 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 196 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 197 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 198 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 199 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 200 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 201 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 202 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 203 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 204 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 205 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 206 | ||
| 207 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 208 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 209 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 210 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 211 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 212 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 213 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 214 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 215 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 216 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 217 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 218 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 219 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 220 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 221 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 222 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 223 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 224 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 225 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 226 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 227 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 228 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 229 | { "Oops - external exception", SIGBUS, BUS_ADRERR }, | |
| 230 | { "Oops - CPU memory protection fault", SIGSEGV, SEGV_ACCERR }, | |
| 231 | { "Oops - CPU memory protection fault in L1P", SIGSEGV, SEGV_ACCERR }, | |
| 232 | { "Oops - DMA memory protection fault in L1P", SIGSEGV, SEGV_ACCERR }, | |
| 233 | { "Oops - CPU memory protection fault in L1D", SIGSEGV, SEGV_ACCERR }, | |
| 234 | { "Oops - DMA memory protection fault in L1D", SIGSEGV, SEGV_ACCERR }, | |
| 235 | { "Oops - CPU memory protection fault in L2", SIGSEGV, SEGV_ACCERR }, | |
| 236 | { "Oops - DMA memory protection fault in L2", SIGSEGV, SEGV_ACCERR }, | |
| 237 | { "Oops - EMC CPU memory protection fault", SIGSEGV, SEGV_ACCERR }, | |
| 238 | { "Oops - EMC bus error", SIGBUS, BUS_ADRERR } | |
| 239 | }; | |
| 240 | ||
| 241 | static void do_trap(struct exception_info *except_info, struct pt_regs *regs) | |
| 242 | { | |
| 243 | unsigned long addr = instruction_pointer(regs); | |
| e94e6682 AJ |
244 | |
| 245 | if (except_info->code != TRAP_BRKPT) | |
| 246 | pr_err("TRAP: %s PC[0x%lx] signo[%d] code[%d]\n", | |
| 247 | except_info->kernel_str, regs->pc, | |
| 248 | except_info->signo, except_info->code); | |
| 249 | ||
| 250 | die_if_kernel(except_info->kernel_str, regs, addr); | |
| 251 | ||
| 559f9008 EB |
252 | force_sig_fault(except_info->signo, except_info->code, |
| 253 | (void __user *)addr, current); | |
| e94e6682 AJ |
254 | } |
| 255 | ||
| 256 | /* | |
| 257 | * Process an internal exception (non maskable) | |
| 258 | */ | |
| 259 | static int process_iexcept(struct pt_regs *regs) | |
| 260 | { | |
| 261 | unsigned int iexcept_report = get_iexcept(); | |
| 262 | unsigned int iexcept_num; | |
| 263 | ||
| 264 | ack_exception(EXCEPT_TYPE_IXF); | |
| 265 | ||
| 266 | pr_err("IEXCEPT: PC[0x%lx]\n", regs->pc); | |
| 267 | ||
| 268 | while (iexcept_report) { | |
| 269 | iexcept_num = __ffs(iexcept_report); | |
| 270 | iexcept_report &= ~(1 << iexcept_num); | |
| 271 | set_iexcept(iexcept_report); | |
| 272 | if (*(unsigned int *)regs->pc == BKPT_OPCODE) { | |
| 273 | /* This is a breakpoint */ | |
| 274 | struct exception_info bkpt_exception = { | |
| 275 | "Oops - undefined instruction", | |
| 276 | SIGTRAP, TRAP_BRKPT | |
| 277 | }; | |
| 278 | do_trap(&bkpt_exception, regs); | |
| 279 | iexcept_report &= ~(0xFF); | |
| 280 | set_iexcept(iexcept_report); | |
| 281 | continue; | |
| 282 | } | |
| 283 | ||
| 284 | do_trap(&iexcept_table[iexcept_num], regs); | |
| 285 | } | |
| 286 | return 0; | |
| 287 | } | |
| 288 | ||
| 289 | /* | |
| 290 | * Process an external exception (maskable) | |
| 291 | */ | |
| 292 | static void process_eexcept(struct pt_regs *regs) | |
| 293 | { | |
| 294 | int evt; | |
| 295 | ||
| 296 | pr_err("EEXCEPT: PC[0x%lx]\n", regs->pc); | |
| 297 | ||
| 298 | while ((evt = soc_get_exception()) >= 0) | |
| 299 | do_trap(&eexcept_table[evt], regs); | |
| 300 | ||
| 301 | ack_exception(EXCEPT_TYPE_EXC); | |
| 302 | } | |
| 303 | ||
| 304 | /* | |
| 305 | * Main exception processing | |
| 306 | */ | |
| 307 | asmlinkage int process_exception(struct pt_regs *regs) | |
| 308 | { | |
| 309 | unsigned int type; | |
| 310 | unsigned int type_num; | |
| 311 | unsigned int ie_num = 9; /* default is unknown exception */ | |
| 312 | ||
| 313 | while ((type = get_except_type()) != 0) { | |
| 314 | type_num = fls(type) - 1; | |
| 315 | ||
| 316 | switch (type_num) { | |
| 317 | case EXCEPT_TYPE_NXF: | |
| 318 | ack_exception(EXCEPT_TYPE_NXF); | |
| 319 | if (c6x_nmi_handler) | |
| 320 | (c6x_nmi_handler)(regs); | |
| 321 | else | |
| 322 | pr_alert("NMI interrupt!\n"); | |
| 323 | break; | |
| 324 | ||
| 325 | case EXCEPT_TYPE_IXF: | |
| 326 | if (process_iexcept(regs)) | |
| 327 | return 1; | |
| 328 | break; | |
| 329 | ||
| 330 | case EXCEPT_TYPE_EXC: | |
| 331 | process_eexcept(regs); | |
| 332 | break; | |
| 333 | ||
| 334 | case EXCEPT_TYPE_SXF: | |
| 335 | ie_num = 8; | |
| 336 | default: | |
| 337 | ack_exception(type_num); | |
| 338 | do_trap(&iexcept_table[ie_num], regs); | |
| 339 | break; | |
| 340 | } | |
| 341 | } | |
| 342 | return 0; | |
| 343 | } | |
| 344 | ||
| 345 | static int kstack_depth_to_print = 48; | |
| 346 | ||
| 347 | static void show_trace(unsigned long *stack, unsigned long *endstack) | |
| 348 | { | |
| 349 | unsigned long addr; | |
| 350 | int i; | |
| 351 | ||
| 352 | pr_debug("Call trace:"); | |
| 353 | i = 0; | |
| 354 | while (stack + 1 <= endstack) { | |
| 355 | addr = *stack++; | |
| 356 | /* | |
| 357 | * If the address is either in the text segment of the | |
| 358 | * kernel, or in the region which contains vmalloc'ed | |
| 359 | * memory, it *may* be the address of a calling | |
| 360 | * routine; if so, print it so that someone tracing | |
| 361 | * down the cause of the crash will be able to figure | |
| 362 | * out the call path that was taken. | |
| 363 | */ | |
| 364 | if (__kernel_text_address(addr)) { | |
| 365 | #ifndef CONFIG_KALLSYMS | |
| 366 | if (i % 5 == 0) | |
| 367 | pr_debug("\n "); | |
| 368 | #endif | |
| 4717fc19 | 369 | pr_debug(" [<%08lx>] %pS\n", addr, (void *)addr); |
| e94e6682 AJ |
370 | i++; |
| 371 | } | |
| 372 | } | |
| 373 | pr_debug("\n"); | |
| 374 | } | |
| 375 | ||
| 376 | void show_stack(struct task_struct *task, unsigned long *stack) | |
| 377 | { | |
| 378 | unsigned long *p, *endstack; | |
| 379 | int i; | |
| 380 | ||
| 381 | if (!stack) { | |
| 382 | if (task && task != current) | |
| 383 | /* We know this is a kernel stack, | |
| 384 | so this is the start/end */ | |
| 385 | stack = (unsigned long *)thread_saved_ksp(task); | |
| 386 | else | |
| 387 | stack = (unsigned long *)&stack; | |
| 388 | } | |
| 389 | endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) | |
| 390 | & -THREAD_SIZE); | |
| 391 | ||
| 392 | pr_debug("Stack from %08lx:", (unsigned long)stack); | |
| 393 | for (i = 0, p = stack; i < kstack_depth_to_print; i++) { | |
| 394 | if (p + 1 > endstack) | |
| 395 | break; | |
| 396 | if (i % 8 == 0) | |
| 397 | pr_cont("\n "); | |
| 398 | pr_cont(" %08lx", *p++); | |
| 399 | } | |
| 400 | pr_cont("\n"); | |
| 401 | show_trace(stack, endstack); | |
| 402 | } | |
| 403 | ||
| 404 | int is_valid_bugaddr(unsigned long addr) | |
| 405 | { | |
| 406 | return __kernel_text_address(addr); | |
| 407 | } |