Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Routines providing a simple monitor for use on the PowerMac. |
| 3 | * |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 4 | * Copyright (C) 1996-2005 Paul Mackerras. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/config.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/sched.h> |
| 14 | #include <linux/smp.h> |
| 15 | #include <linux/mm.h> |
| 16 | #include <linux/reboot.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/kallsyms.h> |
| 19 | #include <linux/cpumask.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 20 | #include <linux/module.h> |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 21 | #include <linux/sysrq.h> |
Andrew Morton | 4694ca0 | 2005-11-13 16:06:50 -0800 | [diff] [blame] | 22 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <asm/ptrace.h> |
| 25 | #include <asm/string.h> |
| 26 | #include <asm/prom.h> |
| 27 | #include <asm/machdep.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 28 | #include <asm/xmon.h> |
| 29 | #ifdef CONFIG_PMAC_BACKLIGHT |
| 30 | #include <asm/backlight.h> |
| 31 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/processor.h> |
| 33 | #include <asm/pgtable.h> |
| 34 | #include <asm/mmu.h> |
| 35 | #include <asm/mmu_context.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <asm/cputable.h> |
| 37 | #include <asm/rtas.h> |
| 38 | #include <asm/sstep.h> |
| 39 | #include <asm/bug.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 40 | |
| 41 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/hvcall.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 43 | #include <asm/paca.h> |
| 44 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #include "nonstdio.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #define scanhex xmon_scanhex |
| 49 | #define skipbl xmon_skipbl |
| 50 | |
| 51 | #ifdef CONFIG_SMP |
| 52 | cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
| 53 | static unsigned long xmon_taken = 1; |
| 54 | static int xmon_owner; |
| 55 | static int xmon_gate; |
| 56 | #endif /* CONFIG_SMP */ |
| 57 | |
| 58 | static unsigned long in_xmon = 0; |
| 59 | |
| 60 | static unsigned long adrs; |
| 61 | static int size = 1; |
| 62 | #define MAX_DUMP (128 * 1024) |
| 63 | static unsigned long ndump = 64; |
| 64 | static unsigned long nidump = 16; |
| 65 | static unsigned long ncsum = 4096; |
| 66 | static int termch; |
| 67 | static char tmpstr[128]; |
| 68 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 69 | #define JMP_BUF_LEN 23 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static long bus_error_jmp[JMP_BUF_LEN]; |
| 71 | static int catch_memory_errors; |
| 72 | static long *xmon_fault_jmp[NR_CPUS]; |
| 73 | #define setjmp xmon_setjmp |
| 74 | #define longjmp xmon_longjmp |
| 75 | |
| 76 | /* Breakpoint stuff */ |
| 77 | struct bpt { |
| 78 | unsigned long address; |
| 79 | unsigned int instr[2]; |
| 80 | atomic_t ref_count; |
| 81 | int enabled; |
| 82 | unsigned long pad; |
| 83 | }; |
| 84 | |
| 85 | /* Bits in bpt.enabled */ |
| 86 | #define BP_IABR_TE 1 /* IABR translation enabled */ |
| 87 | #define BP_IABR 2 |
| 88 | #define BP_TRAP 8 |
| 89 | #define BP_DABR 0x10 |
| 90 | |
| 91 | #define NBPTS 256 |
| 92 | static struct bpt bpts[NBPTS]; |
| 93 | static struct bpt dabr; |
| 94 | static struct bpt *iabr; |
| 95 | static unsigned bpinstr = 0x7fe00008; /* trap */ |
| 96 | |
| 97 | #define BP_NUM(bp) ((bp) - bpts + 1) |
| 98 | |
| 99 | /* Prototypes */ |
| 100 | static int cmds(struct pt_regs *); |
| 101 | static int mread(unsigned long, void *, int); |
| 102 | static int mwrite(unsigned long, void *, int); |
| 103 | static int handle_fault(struct pt_regs *); |
| 104 | static void byterev(unsigned char *, int); |
| 105 | static void memex(void); |
| 106 | static int bsesc(void); |
| 107 | static void dump(void); |
| 108 | static void prdump(unsigned long, long); |
| 109 | static int ppc_inst_dump(unsigned long, long, int); |
| 110 | void print_address(unsigned long); |
| 111 | static void backtrace(struct pt_regs *); |
| 112 | static void excprint(struct pt_regs *); |
| 113 | static void prregs(struct pt_regs *); |
| 114 | static void memops(int); |
| 115 | static void memlocate(void); |
| 116 | static void memzcan(void); |
| 117 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); |
| 118 | int skipbl(void); |
| 119 | int scanhex(unsigned long *valp); |
| 120 | static void scannl(void); |
| 121 | static int hexdigit(int); |
| 122 | void getstring(char *, int); |
| 123 | static void flush_input(void); |
| 124 | static int inchar(void); |
| 125 | static void take_input(char *); |
| 126 | static unsigned long read_spr(int); |
| 127 | static void write_spr(int, unsigned long); |
| 128 | static void super_regs(void); |
| 129 | static void remove_bpts(void); |
| 130 | static void insert_bpts(void); |
| 131 | static void remove_cpu_bpts(void); |
| 132 | static void insert_cpu_bpts(void); |
| 133 | static struct bpt *at_breakpoint(unsigned long pc); |
| 134 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); |
| 135 | static int do_step(struct pt_regs *); |
| 136 | static void bpt_cmds(void); |
| 137 | static void cacheflush(void); |
| 138 | static int cpu_cmd(void); |
| 139 | static void csum(void); |
| 140 | static void bootcmds(void); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 141 | static void proccall(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | void dump_segments(void); |
| 143 | static void symbol_lookup(void); |
| 144 | static void xmon_print_symbol(unsigned long address, const char *mid, |
| 145 | const char *after); |
| 146 | static const char *getvecname(unsigned long vec); |
| 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | extern int print_insn_powerpc(unsigned long, unsigned long, int); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 149 | |
| 150 | extern void xmon_enter(void); |
| 151 | extern void xmon_leave(void); |
| 152 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 153 | extern long setjmp(long *); |
| 154 | extern void longjmp(long *, long); |
| 155 | extern void xmon_save_regs(struct pt_regs *); |
| 156 | |
| 157 | #ifdef CONFIG_PPC64 |
| 158 | #define REG "%.16lx" |
| 159 | #define REGS_PER_LINE 4 |
| 160 | #define LAST_VOLATILE 13 |
| 161 | #else |
| 162 | #define REG "%.8lx" |
| 163 | #define REGS_PER_LINE 8 |
| 164 | #define LAST_VOLATILE 12 |
| 165 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
| 168 | |
| 169 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
| 170 | || ('a' <= (c) && (c) <= 'f') \ |
| 171 | || ('A' <= (c) && (c) <= 'F')) |
| 172 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ |
| 173 | || ('a' <= (c) && (c) <= 'z') \ |
| 174 | || ('A' <= (c) && (c) <= 'Z')) |
| 175 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) |
| 176 | |
| 177 | static char *help_string = "\ |
| 178 | Commands:\n\ |
| 179 | b show breakpoints\n\ |
| 180 | bd set data breakpoint\n\ |
| 181 | bi set instruction breakpoint\n\ |
| 182 | bc clear breakpoint\n" |
| 183 | #ifdef CONFIG_SMP |
| 184 | "\ |
| 185 | c print cpus stopped in xmon\n\ |
| 186 | c# try to switch to cpu number h (in hex)\n" |
| 187 | #endif |
| 188 | "\ |
| 189 | C checksum\n\ |
| 190 | d dump bytes\n\ |
| 191 | di dump instructions\n\ |
| 192 | df dump float values\n\ |
| 193 | dd dump double values\n\ |
| 194 | e print exception information\n\ |
| 195 | f flush cache\n\ |
| 196 | la lookup symbol+offset of specified address\n\ |
| 197 | ls lookup address of specified symbol\n\ |
| 198 | m examine/change memory\n\ |
| 199 | mm move a block of memory\n\ |
| 200 | ms set a block of memory\n\ |
| 201 | md compare two blocks of memory\n\ |
| 202 | ml locate a block of memory\n\ |
| 203 | mz zero a block of memory\n\ |
| 204 | mi show information about memory allocation\n\ |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 205 | p call a procedure\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | r print registers\n\ |
| 207 | s single step\n\ |
| 208 | S print special registers\n\ |
| 209 | t print backtrace\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | x exit monitor and recover\n\ |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 211 | X exit monitor and dont recover\n" |
| 212 | #ifdef CONFIG_PPC64 |
| 213 | " u dump segment table or SLB\n" |
| 214 | #endif |
| 215 | #ifdef CONFIG_PPC_STD_MMU_32 |
| 216 | " u dump segment registers\n" |
| 217 | #endif |
| 218 | " ? help\n" |
| 219 | " zr reboot\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | zh halt\n" |
| 221 | ; |
| 222 | |
| 223 | static struct pt_regs *xmon_regs; |
| 224 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 225 | static inline void sync(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
| 227 | asm volatile("sync; isync"); |
| 228 | } |
| 229 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 230 | static inline void store_inst(void *p) |
| 231 | { |
| 232 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); |
| 233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 235 | static inline void cflush(void *p) |
| 236 | { |
| 237 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); |
| 238 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 240 | static inline void cinval(void *p) |
| 241 | { |
| 242 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); |
| 243 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | /* |
| 246 | * Disable surveillance (the service processor watchdog function) |
| 247 | * while we are in xmon. |
| 248 | * XXX we should re-enable it when we leave. :) |
| 249 | */ |
| 250 | #define SURVEILLANCE_TOKEN 9000 |
| 251 | |
| 252 | static inline void disable_surveillance(void) |
| 253 | { |
| 254 | #ifdef CONFIG_PPC_PSERIES |
| 255 | /* Since this can't be a module, args should end up below 4GB. */ |
| 256 | static struct rtas_args args; |
| 257 | |
| 258 | /* |
| 259 | * At this point we have got all the cpus we can into |
| 260 | * xmon, so there is hopefully no other cpu calling RTAS |
| 261 | * at the moment, even though we don't take rtas.lock. |
| 262 | * If we did try to take rtas.lock there would be a |
| 263 | * real possibility of deadlock. |
| 264 | */ |
| 265 | args.token = rtas_token("set-indicator"); |
| 266 | if (args.token == RTAS_UNKNOWN_SERVICE) |
| 267 | return; |
| 268 | args.nargs = 3; |
| 269 | args.nret = 1; |
| 270 | args.rets = &args.args[3]; |
| 271 | args.args[0] = SURVEILLANCE_TOKEN; |
| 272 | args.args[1] = 0; |
| 273 | args.args[2] = 0; |
| 274 | enter_rtas(__pa(&args)); |
| 275 | #endif /* CONFIG_PPC_PSERIES */ |
| 276 | } |
| 277 | |
| 278 | #ifdef CONFIG_SMP |
| 279 | static int xmon_speaker; |
| 280 | |
| 281 | static void get_output_lock(void) |
| 282 | { |
| 283 | int me = smp_processor_id() + 0x100; |
| 284 | int last_speaker = 0, prev; |
| 285 | long timeout; |
| 286 | |
| 287 | if (xmon_speaker == me) |
| 288 | return; |
| 289 | for (;;) { |
| 290 | if (xmon_speaker == 0) { |
| 291 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
| 292 | if (last_speaker == 0) |
| 293 | return; |
| 294 | } |
| 295 | timeout = 10000000; |
| 296 | while (xmon_speaker == last_speaker) { |
| 297 | if (--timeout > 0) |
| 298 | continue; |
| 299 | /* hostile takeover */ |
| 300 | prev = cmpxchg(&xmon_speaker, last_speaker, me); |
| 301 | if (prev == last_speaker) |
| 302 | return; |
| 303 | break; |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | static void release_output_lock(void) |
| 309 | { |
| 310 | xmon_speaker = 0; |
| 311 | } |
| 312 | #endif |
| 313 | |
| 314 | int xmon_core(struct pt_regs *regs, int fromipi) |
| 315 | { |
| 316 | int cmd = 0; |
| 317 | unsigned long msr; |
| 318 | struct bpt *bp; |
| 319 | long recurse_jmp[JMP_BUF_LEN]; |
| 320 | unsigned long offset; |
| 321 | #ifdef CONFIG_SMP |
| 322 | int cpu; |
| 323 | int secondary; |
| 324 | unsigned long timeout; |
| 325 | #endif |
| 326 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 327 | msr = mfmsr(); |
| 328 | mtmsr(msr & ~MSR_EE); /* disable interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | bp = in_breakpoint_table(regs->nip, &offset); |
| 331 | if (bp != NULL) { |
| 332 | regs->nip = bp->address + offset; |
| 333 | atomic_dec(&bp->ref_count); |
| 334 | } |
| 335 | |
| 336 | remove_cpu_bpts(); |
| 337 | |
| 338 | #ifdef CONFIG_SMP |
| 339 | cpu = smp_processor_id(); |
| 340 | if (cpu_isset(cpu, cpus_in_xmon)) { |
| 341 | get_output_lock(); |
| 342 | excprint(regs); |
| 343 | printf("cpu 0x%x: Exception %lx %s in xmon, " |
| 344 | "returning to main loop\n", |
| 345 | cpu, regs->trap, getvecname(TRAP(regs))); |
Haren Myneni | 5cb4cc0 | 2005-08-03 15:08:18 +1000 | [diff] [blame] | 346 | release_output_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | longjmp(xmon_fault_jmp[cpu], 1); |
| 348 | } |
| 349 | |
| 350 | if (setjmp(recurse_jmp) != 0) { |
| 351 | if (!in_xmon || !xmon_gate) { |
Haren Myneni | 5cb4cc0 | 2005-08-03 15:08:18 +1000 | [diff] [blame] | 352 | get_output_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | printf("xmon: WARNING: bad recursive fault " |
| 354 | "on cpu 0x%x\n", cpu); |
Haren Myneni | 5cb4cc0 | 2005-08-03 15:08:18 +1000 | [diff] [blame] | 355 | release_output_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | goto waiting; |
| 357 | } |
| 358 | secondary = !(xmon_taken && cpu == xmon_owner); |
| 359 | goto cmdloop; |
| 360 | } |
| 361 | |
| 362 | xmon_fault_jmp[cpu] = recurse_jmp; |
| 363 | cpu_set(cpu, cpus_in_xmon); |
| 364 | |
| 365 | bp = NULL; |
| 366 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) |
| 367 | bp = at_breakpoint(regs->nip); |
| 368 | if (bp || (regs->msr & MSR_RI) == 0) |
| 369 | fromipi = 0; |
| 370 | |
| 371 | if (!fromipi) { |
| 372 | get_output_lock(); |
| 373 | excprint(regs); |
| 374 | if (bp) { |
| 375 | printf("cpu 0x%x stopped at breakpoint 0x%x (", |
| 376 | cpu, BP_NUM(bp)); |
| 377 | xmon_print_symbol(regs->nip, " ", ")\n"); |
| 378 | } |
| 379 | if ((regs->msr & MSR_RI) == 0) |
| 380 | printf("WARNING: exception is not recoverable, " |
| 381 | "can't continue\n"); |
| 382 | release_output_lock(); |
| 383 | } |
| 384 | |
| 385 | waiting: |
| 386 | secondary = 1; |
| 387 | while (secondary && !xmon_gate) { |
| 388 | if (in_xmon == 0) { |
| 389 | if (fromipi) |
| 390 | goto leave; |
| 391 | secondary = test_and_set_bit(0, &in_xmon); |
| 392 | } |
| 393 | barrier(); |
| 394 | } |
| 395 | |
| 396 | if (!secondary && !xmon_gate) { |
| 397 | /* we are the first cpu to come in */ |
| 398 | /* interrupt other cpu(s) */ |
| 399 | int ncpus = num_online_cpus(); |
| 400 | |
| 401 | xmon_owner = cpu; |
| 402 | mb(); |
| 403 | if (ncpus > 1) { |
| 404 | smp_send_debugger_break(MSG_ALL_BUT_SELF); |
| 405 | /* wait for other cpus to come in */ |
| 406 | for (timeout = 100000000; timeout != 0; --timeout) { |
| 407 | if (cpus_weight(cpus_in_xmon) >= ncpus) |
| 408 | break; |
| 409 | barrier(); |
| 410 | } |
| 411 | } |
| 412 | remove_bpts(); |
| 413 | disable_surveillance(); |
| 414 | /* for breakpoint or single step, print the current instr. */ |
| 415 | if (bp || TRAP(regs) == 0xd00) |
| 416 | ppc_inst_dump(regs->nip, 1, 0); |
| 417 | printf("enter ? for help\n"); |
| 418 | mb(); |
| 419 | xmon_gate = 1; |
| 420 | barrier(); |
| 421 | } |
| 422 | |
| 423 | cmdloop: |
| 424 | while (in_xmon) { |
| 425 | if (secondary) { |
| 426 | if (cpu == xmon_owner) { |
| 427 | if (!test_and_set_bit(0, &xmon_taken)) { |
| 428 | secondary = 0; |
| 429 | continue; |
| 430 | } |
| 431 | /* missed it */ |
| 432 | while (cpu == xmon_owner) |
| 433 | barrier(); |
| 434 | } |
| 435 | barrier(); |
| 436 | } else { |
| 437 | cmd = cmds(regs); |
| 438 | if (cmd != 0) { |
| 439 | /* exiting xmon */ |
| 440 | insert_bpts(); |
| 441 | xmon_gate = 0; |
| 442 | wmb(); |
| 443 | in_xmon = 0; |
| 444 | break; |
| 445 | } |
| 446 | /* have switched to some other cpu */ |
| 447 | secondary = 1; |
| 448 | } |
| 449 | } |
| 450 | leave: |
| 451 | cpu_clear(cpu, cpus_in_xmon); |
| 452 | xmon_fault_jmp[cpu] = NULL; |
| 453 | |
| 454 | #else |
| 455 | /* UP is simple... */ |
| 456 | if (in_xmon) { |
| 457 | printf("Exception %lx %s in xmon, returning to main loop\n", |
| 458 | regs->trap, getvecname(TRAP(regs))); |
| 459 | longjmp(xmon_fault_jmp[0], 1); |
| 460 | } |
| 461 | if (setjmp(recurse_jmp) == 0) { |
| 462 | xmon_fault_jmp[0] = recurse_jmp; |
| 463 | in_xmon = 1; |
| 464 | |
| 465 | excprint(regs); |
| 466 | bp = at_breakpoint(regs->nip); |
| 467 | if (bp) { |
| 468 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); |
| 469 | xmon_print_symbol(regs->nip, " ", ")\n"); |
| 470 | } |
| 471 | if ((regs->msr & MSR_RI) == 0) |
| 472 | printf("WARNING: exception is not recoverable, " |
| 473 | "can't continue\n"); |
| 474 | remove_bpts(); |
| 475 | disable_surveillance(); |
| 476 | /* for breakpoint or single step, print the current instr. */ |
| 477 | if (bp || TRAP(regs) == 0xd00) |
| 478 | ppc_inst_dump(regs->nip, 1, 0); |
| 479 | printf("enter ? for help\n"); |
| 480 | } |
| 481 | |
| 482 | cmd = cmds(regs); |
| 483 | |
| 484 | insert_bpts(); |
| 485 | in_xmon = 0; |
| 486 | #endif |
| 487 | |
| 488 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { |
| 489 | bp = at_breakpoint(regs->nip); |
| 490 | if (bp != NULL) { |
| 491 | int stepped = emulate_step(regs, bp->instr[0]); |
| 492 | if (stepped == 0) { |
| 493 | regs->nip = (unsigned long) &bp->instr[0]; |
| 494 | atomic_inc(&bp->ref_count); |
| 495 | } else if (stepped < 0) { |
| 496 | printf("Couldn't single-step %s instruction\n", |
| 497 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | insert_cpu_bpts(); |
| 503 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 504 | mtmsr(msr); /* restore interrupt enable */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | return cmd != 'X'; |
| 507 | } |
| 508 | |
| 509 | int xmon(struct pt_regs *excp) |
| 510 | { |
| 511 | struct pt_regs regs; |
| 512 | |
| 513 | if (excp == NULL) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 514 | xmon_save_regs(®s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | excp = ®s; |
| 516 | } |
| 517 | return xmon_core(excp, 0); |
| 518 | } |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 519 | EXPORT_SYMBOL(xmon); |
| 520 | |
| 521 | irqreturn_t |
| 522 | xmon_irq(int irq, void *d, struct pt_regs *regs) |
| 523 | { |
| 524 | unsigned long flags; |
| 525 | local_irq_save(flags); |
| 526 | printf("Keyboard interrupt\n"); |
| 527 | xmon(regs); |
| 528 | local_irq_restore(flags); |
| 529 | return IRQ_HANDLED; |
| 530 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
| 532 | int xmon_bpt(struct pt_regs *regs) |
| 533 | { |
| 534 | struct bpt *bp; |
| 535 | unsigned long offset; |
| 536 | |
| 537 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) |
| 538 | return 0; |
| 539 | |
| 540 | /* Are we at the trap at bp->instr[1] for some bp? */ |
| 541 | bp = in_breakpoint_table(regs->nip, &offset); |
| 542 | if (bp != NULL && offset == 4) { |
| 543 | regs->nip = bp->address + 4; |
| 544 | atomic_dec(&bp->ref_count); |
| 545 | return 1; |
| 546 | } |
| 547 | |
| 548 | /* Are we at a breakpoint? */ |
| 549 | bp = at_breakpoint(regs->nip); |
| 550 | if (!bp) |
| 551 | return 0; |
| 552 | |
| 553 | xmon_core(regs, 0); |
| 554 | |
| 555 | return 1; |
| 556 | } |
| 557 | |
| 558 | int xmon_sstep(struct pt_regs *regs) |
| 559 | { |
| 560 | if (user_mode(regs)) |
| 561 | return 0; |
| 562 | xmon_core(regs, 0); |
| 563 | return 1; |
| 564 | } |
| 565 | |
| 566 | int xmon_dabr_match(struct pt_regs *regs) |
| 567 | { |
| 568 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) |
| 569 | return 0; |
Anton Blanchard | fd9648d | 2005-09-10 16:01:11 +1000 | [diff] [blame] | 570 | if (dabr.enabled == 0) |
| 571 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | xmon_core(regs, 0); |
| 573 | return 1; |
| 574 | } |
| 575 | |
| 576 | int xmon_iabr_match(struct pt_regs *regs) |
| 577 | { |
| 578 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) |
| 579 | return 0; |
| 580 | if (iabr == 0) |
| 581 | return 0; |
| 582 | xmon_core(regs, 0); |
| 583 | return 1; |
| 584 | } |
| 585 | |
| 586 | int xmon_ipi(struct pt_regs *regs) |
| 587 | { |
| 588 | #ifdef CONFIG_SMP |
| 589 | if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon)) |
| 590 | xmon_core(regs, 1); |
| 591 | #endif |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | int xmon_fault_handler(struct pt_regs *regs) |
| 596 | { |
| 597 | struct bpt *bp; |
| 598 | unsigned long offset; |
| 599 | |
| 600 | if (in_xmon && catch_memory_errors) |
| 601 | handle_fault(regs); /* doesn't return */ |
| 602 | |
| 603 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { |
| 604 | bp = in_breakpoint_table(regs->nip, &offset); |
| 605 | if (bp != NULL) { |
| 606 | regs->nip = bp->address + offset; |
| 607 | atomic_dec(&bp->ref_count); |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | static struct bpt *at_breakpoint(unsigned long pc) |
| 615 | { |
| 616 | int i; |
| 617 | struct bpt *bp; |
| 618 | |
| 619 | bp = bpts; |
| 620 | for (i = 0; i < NBPTS; ++i, ++bp) |
| 621 | if (bp->enabled && pc == bp->address) |
| 622 | return bp; |
| 623 | return NULL; |
| 624 | } |
| 625 | |
| 626 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) |
| 627 | { |
| 628 | unsigned long off; |
| 629 | |
| 630 | off = nip - (unsigned long) bpts; |
| 631 | if (off >= sizeof(bpts)) |
| 632 | return NULL; |
| 633 | off %= sizeof(struct bpt); |
| 634 | if (off != offsetof(struct bpt, instr[0]) |
| 635 | && off != offsetof(struct bpt, instr[1])) |
| 636 | return NULL; |
| 637 | *offp = off - offsetof(struct bpt, instr[0]); |
| 638 | return (struct bpt *) (nip - off); |
| 639 | } |
| 640 | |
| 641 | static struct bpt *new_breakpoint(unsigned long a) |
| 642 | { |
| 643 | struct bpt *bp; |
| 644 | |
| 645 | a &= ~3UL; |
| 646 | bp = at_breakpoint(a); |
| 647 | if (bp) |
| 648 | return bp; |
| 649 | |
| 650 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { |
| 651 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { |
| 652 | bp->address = a; |
| 653 | bp->instr[1] = bpinstr; |
| 654 | store_inst(&bp->instr[1]); |
| 655 | return bp; |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | printf("Sorry, no free breakpoints. Please clear one first.\n"); |
| 660 | return NULL; |
| 661 | } |
| 662 | |
| 663 | static void insert_bpts(void) |
| 664 | { |
| 665 | int i; |
| 666 | struct bpt *bp; |
| 667 | |
| 668 | bp = bpts; |
| 669 | for (i = 0; i < NBPTS; ++i, ++bp) { |
| 670 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) |
| 671 | continue; |
| 672 | if (mread(bp->address, &bp->instr[0], 4) != 4) { |
| 673 | printf("Couldn't read instruction at %lx, " |
| 674 | "disabling breakpoint there\n", bp->address); |
| 675 | bp->enabled = 0; |
| 676 | continue; |
| 677 | } |
| 678 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { |
| 679 | printf("Breakpoint at %lx is on an mtmsrd or rfid " |
| 680 | "instruction, disabling it\n", bp->address); |
| 681 | bp->enabled = 0; |
| 682 | continue; |
| 683 | } |
| 684 | store_inst(&bp->instr[0]); |
| 685 | if (bp->enabled & BP_IABR) |
| 686 | continue; |
| 687 | if (mwrite(bp->address, &bpinstr, 4) != 4) { |
| 688 | printf("Couldn't write instruction at %lx, " |
| 689 | "disabling breakpoint there\n", bp->address); |
| 690 | bp->enabled &= ~BP_TRAP; |
| 691 | continue; |
| 692 | } |
| 693 | store_inst((void *)bp->address); |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | static void insert_cpu_bpts(void) |
| 698 | { |
| 699 | if (dabr.enabled) |
Anton Blanchard | fd9648d | 2005-09-10 16:01:11 +1000 | [diff] [blame] | 700 | set_dabr(dabr.address | (dabr.enabled & 7)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 702 | mtspr(SPRN_IABR, iabr->address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
| 704 | } |
| 705 | |
| 706 | static void remove_bpts(void) |
| 707 | { |
| 708 | int i; |
| 709 | struct bpt *bp; |
| 710 | unsigned instr; |
| 711 | |
| 712 | bp = bpts; |
| 713 | for (i = 0; i < NBPTS; ++i, ++bp) { |
| 714 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) |
| 715 | continue; |
| 716 | if (mread(bp->address, &instr, 4) == 4 |
| 717 | && instr == bpinstr |
| 718 | && mwrite(bp->address, &bp->instr, 4) != 4) |
| 719 | printf("Couldn't remove breakpoint at %lx\n", |
| 720 | bp->address); |
| 721 | else |
| 722 | store_inst((void *)bp->address); |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | static void remove_cpu_bpts(void) |
| 727 | { |
Anton Blanchard | fd9648d | 2005-09-10 16:01:11 +1000 | [diff] [blame] | 728 | set_dabr(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | if (cpu_has_feature(CPU_FTR_IABR)) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 730 | mtspr(SPRN_IABR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | } |
| 732 | |
| 733 | /* Command interpreting routine */ |
| 734 | static char *last_cmd; |
| 735 | |
| 736 | static int |
| 737 | cmds(struct pt_regs *excp) |
| 738 | { |
| 739 | int cmd = 0; |
| 740 | |
| 741 | last_cmd = NULL; |
| 742 | xmon_regs = excp; |
| 743 | for(;;) { |
| 744 | #ifdef CONFIG_SMP |
| 745 | printf("%x:", smp_processor_id()); |
| 746 | #endif /* CONFIG_SMP */ |
| 747 | printf("mon> "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | flush_input(); |
| 749 | termch = 0; |
| 750 | cmd = skipbl(); |
| 751 | if( cmd == '\n' ) { |
| 752 | if (last_cmd == NULL) |
| 753 | continue; |
| 754 | take_input(last_cmd); |
| 755 | last_cmd = NULL; |
| 756 | cmd = inchar(); |
| 757 | } |
| 758 | switch (cmd) { |
| 759 | case 'm': |
| 760 | cmd = inchar(); |
| 761 | switch (cmd) { |
| 762 | case 'm': |
| 763 | case 's': |
| 764 | case 'd': |
| 765 | memops(cmd); |
| 766 | break; |
| 767 | case 'l': |
| 768 | memlocate(); |
| 769 | break; |
| 770 | case 'z': |
| 771 | memzcan(); |
| 772 | break; |
| 773 | case 'i': |
| 774 | show_mem(); |
| 775 | break; |
| 776 | default: |
| 777 | termch = cmd; |
| 778 | memex(); |
| 779 | } |
| 780 | break; |
| 781 | case 'd': |
| 782 | dump(); |
| 783 | break; |
| 784 | case 'l': |
| 785 | symbol_lookup(); |
| 786 | break; |
| 787 | case 'r': |
| 788 | prregs(excp); /* print regs */ |
| 789 | break; |
| 790 | case 'e': |
| 791 | excprint(excp); |
| 792 | break; |
| 793 | case 'S': |
| 794 | super_regs(); |
| 795 | break; |
| 796 | case 't': |
| 797 | backtrace(excp); |
| 798 | break; |
| 799 | case 'f': |
| 800 | cacheflush(); |
| 801 | break; |
| 802 | case 's': |
| 803 | if (do_step(excp)) |
| 804 | return cmd; |
| 805 | break; |
| 806 | case 'x': |
| 807 | case 'X': |
| 808 | case EOF: |
| 809 | return cmd; |
| 810 | case '?': |
| 811 | printf(help_string); |
| 812 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | case 'b': |
| 814 | bpt_cmds(); |
| 815 | break; |
| 816 | case 'C': |
| 817 | csum(); |
| 818 | break; |
| 819 | case 'c': |
| 820 | if (cpu_cmd()) |
| 821 | return 0; |
| 822 | break; |
| 823 | case 'z': |
| 824 | bootcmds(); |
| 825 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 826 | case 'p': |
| 827 | proccall(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 829 | #ifdef CONFIG_PPC_STD_MMU |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | case 'u': |
| 831 | dump_segments(); |
| 832 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 833 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | default: |
| 835 | printf("Unrecognized command: "); |
| 836 | do { |
| 837 | if (' ' < cmd && cmd <= '~') |
| 838 | putchar(cmd); |
| 839 | else |
| 840 | printf("\\x%x", cmd); |
| 841 | cmd = inchar(); |
| 842 | } while (cmd != '\n'); |
| 843 | printf(" (type ? for help)\n"); |
| 844 | break; |
| 845 | } |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* |
| 850 | * Step a single instruction. |
| 851 | * Some instructions we emulate, others we execute with MSR_SE set. |
| 852 | */ |
| 853 | static int do_step(struct pt_regs *regs) |
| 854 | { |
| 855 | unsigned int instr; |
| 856 | int stepped; |
| 857 | |
| 858 | /* check we are in 64-bit kernel mode, translation enabled */ |
| 859 | if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) { |
| 860 | if (mread(regs->nip, &instr, 4) == 4) { |
| 861 | stepped = emulate_step(regs, instr); |
| 862 | if (stepped < 0) { |
| 863 | printf("Couldn't single-step %s instruction\n", |
| 864 | (IS_RFID(instr)? "rfid": "mtmsrd")); |
| 865 | return 0; |
| 866 | } |
| 867 | if (stepped > 0) { |
| 868 | regs->trap = 0xd00 | (regs->trap & 1); |
| 869 | printf("stepped to "); |
| 870 | xmon_print_symbol(regs->nip, " ", "\n"); |
| 871 | ppc_inst_dump(regs->nip, 1, 0); |
| 872 | return 0; |
| 873 | } |
| 874 | } |
| 875 | } |
| 876 | regs->msr |= MSR_SE; |
| 877 | return 1; |
| 878 | } |
| 879 | |
| 880 | static void bootcmds(void) |
| 881 | { |
| 882 | int cmd; |
| 883 | |
| 884 | cmd = inchar(); |
| 885 | if (cmd == 'r') |
| 886 | ppc_md.restart(NULL); |
| 887 | else if (cmd == 'h') |
| 888 | ppc_md.halt(); |
| 889 | else if (cmd == 'p') |
| 890 | ppc_md.power_off(); |
| 891 | } |
| 892 | |
| 893 | static int cpu_cmd(void) |
| 894 | { |
| 895 | #ifdef CONFIG_SMP |
| 896 | unsigned long cpu; |
| 897 | int timeout; |
| 898 | int count; |
| 899 | |
| 900 | if (!scanhex(&cpu)) { |
| 901 | /* print cpus waiting or in xmon */ |
| 902 | printf("cpus stopped:"); |
| 903 | count = 0; |
| 904 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { |
| 905 | if (cpu_isset(cpu, cpus_in_xmon)) { |
| 906 | if (count == 0) |
| 907 | printf(" %x", cpu); |
| 908 | ++count; |
| 909 | } else { |
| 910 | if (count > 1) |
| 911 | printf("-%x", cpu - 1); |
| 912 | count = 0; |
| 913 | } |
| 914 | } |
| 915 | if (count > 1) |
| 916 | printf("-%x", NR_CPUS - 1); |
| 917 | printf("\n"); |
| 918 | return 0; |
| 919 | } |
| 920 | /* try to switch to cpu specified */ |
| 921 | if (!cpu_isset(cpu, cpus_in_xmon)) { |
| 922 | printf("cpu 0x%x isn't in xmon\n", cpu); |
| 923 | return 0; |
| 924 | } |
| 925 | xmon_taken = 0; |
| 926 | mb(); |
| 927 | xmon_owner = cpu; |
| 928 | timeout = 10000000; |
| 929 | while (!xmon_taken) { |
| 930 | if (--timeout == 0) { |
| 931 | if (test_and_set_bit(0, &xmon_taken)) |
| 932 | break; |
| 933 | /* take control back */ |
| 934 | mb(); |
| 935 | xmon_owner = smp_processor_id(); |
| 936 | printf("cpu %u didn't take control\n", cpu); |
| 937 | return 0; |
| 938 | } |
| 939 | barrier(); |
| 940 | } |
| 941 | return 1; |
| 942 | #else |
| 943 | return 0; |
| 944 | #endif /* CONFIG_SMP */ |
| 945 | } |
| 946 | |
| 947 | static unsigned short fcstab[256] = { |
| 948 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, |
| 949 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, |
| 950 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, |
| 951 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, |
| 952 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, |
| 953 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, |
| 954 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, |
| 955 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, |
| 956 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, |
| 957 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, |
| 958 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, |
| 959 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, |
| 960 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, |
| 961 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, |
| 962 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, |
| 963 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, |
| 964 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, |
| 965 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, |
| 966 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, |
| 967 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, |
| 968 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, |
| 969 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, |
| 970 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, |
| 971 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, |
| 972 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, |
| 973 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, |
| 974 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, |
| 975 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, |
| 976 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, |
| 977 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, |
| 978 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, |
| 979 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 |
| 980 | }; |
| 981 | |
| 982 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) |
| 983 | |
| 984 | static void |
| 985 | csum(void) |
| 986 | { |
| 987 | unsigned int i; |
| 988 | unsigned short fcs; |
| 989 | unsigned char v; |
| 990 | |
| 991 | if (!scanhex(&adrs)) |
| 992 | return; |
| 993 | if (!scanhex(&ncsum)) |
| 994 | return; |
| 995 | fcs = 0xffff; |
| 996 | for (i = 0; i < ncsum; ++i) { |
| 997 | if (mread(adrs+i, &v, 1) == 0) { |
| 998 | printf("csum stopped at %x\n", adrs+i); |
| 999 | break; |
| 1000 | } |
| 1001 | fcs = FCS(fcs, v); |
| 1002 | } |
| 1003 | printf("%x\n", fcs); |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * Check if this is a suitable place to put a breakpoint. |
| 1008 | */ |
| 1009 | static long check_bp_loc(unsigned long addr) |
| 1010 | { |
| 1011 | unsigned int instr; |
| 1012 | |
| 1013 | addr &= ~3; |
| 1014 | if (addr < KERNELBASE) { |
| 1015 | printf("Breakpoints may only be placed at kernel addresses\n"); |
| 1016 | return 0; |
| 1017 | } |
| 1018 | if (!mread(addr, &instr, sizeof(instr))) { |
| 1019 | printf("Can't read instruction at address %lx\n", addr); |
| 1020 | return 0; |
| 1021 | } |
| 1022 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { |
| 1023 | printf("Breakpoints may not be placed on mtmsrd or rfid " |
| 1024 | "instructions\n"); |
| 1025 | return 0; |
| 1026 | } |
| 1027 | return 1; |
| 1028 | } |
| 1029 | |
| 1030 | static char *breakpoint_help_string = |
| 1031 | "Breakpoint command usage:\n" |
| 1032 | "b show breakpoints\n" |
| 1033 | "b <addr> [cnt] set breakpoint at given instr addr\n" |
| 1034 | "bc clear all breakpoints\n" |
| 1035 | "bc <n/addr> clear breakpoint number n or at addr\n" |
| 1036 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" |
| 1037 | "bd <addr> [cnt] set hardware data breakpoint\n" |
| 1038 | ""; |
| 1039 | |
| 1040 | static void |
| 1041 | bpt_cmds(void) |
| 1042 | { |
| 1043 | int cmd; |
| 1044 | unsigned long a; |
| 1045 | int mode, i; |
| 1046 | struct bpt *bp; |
| 1047 | const char badaddr[] = "Only kernel addresses are permitted " |
| 1048 | "for breakpoints\n"; |
| 1049 | |
| 1050 | cmd = inchar(); |
| 1051 | switch (cmd) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1052 | #ifndef CONFIG_8xx |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | case 'd': /* bd - hardware data breakpoint */ |
| 1054 | mode = 7; |
| 1055 | cmd = inchar(); |
| 1056 | if (cmd == 'r') |
| 1057 | mode = 5; |
| 1058 | else if (cmd == 'w') |
| 1059 | mode = 6; |
| 1060 | else |
| 1061 | termch = cmd; |
| 1062 | dabr.address = 0; |
| 1063 | dabr.enabled = 0; |
| 1064 | if (scanhex(&dabr.address)) { |
| 1065 | if (dabr.address < KERNELBASE) { |
| 1066 | printf(badaddr); |
| 1067 | break; |
| 1068 | } |
| 1069 | dabr.address &= ~7; |
| 1070 | dabr.enabled = mode | BP_DABR; |
| 1071 | } |
| 1072 | break; |
| 1073 | |
| 1074 | case 'i': /* bi - hardware instr breakpoint */ |
| 1075 | if (!cpu_has_feature(CPU_FTR_IABR)) { |
| 1076 | printf("Hardware instruction breakpoint " |
| 1077 | "not supported on this cpu\n"); |
| 1078 | break; |
| 1079 | } |
| 1080 | if (iabr) { |
| 1081 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); |
| 1082 | iabr = NULL; |
| 1083 | } |
| 1084 | if (!scanhex(&a)) |
| 1085 | break; |
| 1086 | if (!check_bp_loc(a)) |
| 1087 | break; |
| 1088 | bp = new_breakpoint(a); |
| 1089 | if (bp != NULL) { |
| 1090 | bp->enabled |= BP_IABR | BP_IABR_TE; |
| 1091 | iabr = bp; |
| 1092 | } |
| 1093 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1094 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | |
| 1096 | case 'c': |
| 1097 | if (!scanhex(&a)) { |
| 1098 | /* clear all breakpoints */ |
| 1099 | for (i = 0; i < NBPTS; ++i) |
| 1100 | bpts[i].enabled = 0; |
| 1101 | iabr = NULL; |
| 1102 | dabr.enabled = 0; |
| 1103 | printf("All breakpoints cleared\n"); |
| 1104 | break; |
| 1105 | } |
| 1106 | |
| 1107 | if (a <= NBPTS && a >= 1) { |
| 1108 | /* assume a breakpoint number */ |
| 1109 | bp = &bpts[a-1]; /* bp nums are 1 based */ |
| 1110 | } else { |
| 1111 | /* assume a breakpoint address */ |
| 1112 | bp = at_breakpoint(a); |
| 1113 | if (bp == 0) { |
| 1114 | printf("No breakpoint at %x\n", a); |
| 1115 | break; |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | printf("Cleared breakpoint %x (", BP_NUM(bp)); |
| 1120 | xmon_print_symbol(bp->address, " ", ")\n"); |
| 1121 | bp->enabled = 0; |
| 1122 | break; |
| 1123 | |
| 1124 | default: |
| 1125 | termch = cmd; |
| 1126 | cmd = skipbl(); |
| 1127 | if (cmd == '?') { |
| 1128 | printf(breakpoint_help_string); |
| 1129 | break; |
| 1130 | } |
| 1131 | termch = cmd; |
| 1132 | if (!scanhex(&a)) { |
| 1133 | /* print all breakpoints */ |
| 1134 | printf(" type address\n"); |
| 1135 | if (dabr.enabled) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1136 | printf(" data "REG" [", dabr.address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | if (dabr.enabled & 1) |
| 1138 | printf("r"); |
| 1139 | if (dabr.enabled & 2) |
| 1140 | printf("w"); |
| 1141 | printf("]\n"); |
| 1142 | } |
| 1143 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { |
| 1144 | if (!bp->enabled) |
| 1145 | continue; |
| 1146 | printf("%2x %s ", BP_NUM(bp), |
| 1147 | (bp->enabled & BP_IABR)? "inst": "trap"); |
| 1148 | xmon_print_symbol(bp->address, " ", "\n"); |
| 1149 | } |
| 1150 | break; |
| 1151 | } |
| 1152 | |
| 1153 | if (!check_bp_loc(a)) |
| 1154 | break; |
| 1155 | bp = new_breakpoint(a); |
| 1156 | if (bp != NULL) |
| 1157 | bp->enabled |= BP_TRAP; |
| 1158 | break; |
| 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | /* Very cheap human name for vector lookup. */ |
| 1163 | static |
| 1164 | const char *getvecname(unsigned long vec) |
| 1165 | { |
| 1166 | char *ret; |
| 1167 | |
| 1168 | switch (vec) { |
| 1169 | case 0x100: ret = "(System Reset)"; break; |
| 1170 | case 0x200: ret = "(Machine Check)"; break; |
| 1171 | case 0x300: ret = "(Data Access)"; break; |
| 1172 | case 0x380: ret = "(Data SLB Access)"; break; |
| 1173 | case 0x400: ret = "(Instruction Access)"; break; |
| 1174 | case 0x480: ret = "(Instruction SLB Access)"; break; |
| 1175 | case 0x500: ret = "(Hardware Interrupt)"; break; |
| 1176 | case 0x600: ret = "(Alignment)"; break; |
| 1177 | case 0x700: ret = "(Program Check)"; break; |
| 1178 | case 0x800: ret = "(FPU Unavailable)"; break; |
| 1179 | case 0x900: ret = "(Decrementer)"; break; |
| 1180 | case 0xc00: ret = "(System Call)"; break; |
| 1181 | case 0xd00: ret = "(Single Step)"; break; |
| 1182 | case 0xf00: ret = "(Performance Monitor)"; break; |
| 1183 | case 0xf20: ret = "(Altivec Unavailable)"; break; |
| 1184 | case 0x1300: ret = "(Instruction Breakpoint)"; break; |
| 1185 | default: ret = ""; |
| 1186 | } |
| 1187 | return ret; |
| 1188 | } |
| 1189 | |
| 1190 | static void get_function_bounds(unsigned long pc, unsigned long *startp, |
| 1191 | unsigned long *endp) |
| 1192 | { |
| 1193 | unsigned long size, offset; |
| 1194 | const char *name; |
| 1195 | char *modname; |
| 1196 | |
| 1197 | *startp = *endp = 0; |
| 1198 | if (pc == 0) |
| 1199 | return; |
| 1200 | if (setjmp(bus_error_jmp) == 0) { |
| 1201 | catch_memory_errors = 1; |
| 1202 | sync(); |
| 1203 | name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr); |
| 1204 | if (name != NULL) { |
| 1205 | *startp = pc - offset; |
| 1206 | *endp = pc - offset + size; |
| 1207 | } |
| 1208 | sync(); |
| 1209 | } |
| 1210 | catch_memory_errors = 0; |
| 1211 | } |
| 1212 | |
| 1213 | static int xmon_depth_to_print = 64; |
| 1214 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1215 | #ifdef CONFIG_PPC64 |
| 1216 | #define LRSAVE_OFFSET 0x10 |
| 1217 | #define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */ |
| 1218 | #define MARKER_OFFSET 0x60 |
| 1219 | #define REGS_OFFSET 0x70 |
| 1220 | #else |
| 1221 | #define LRSAVE_OFFSET 4 |
| 1222 | #define REG_FRAME_MARKER 0x72656773 |
| 1223 | #define MARKER_OFFSET 8 |
| 1224 | #define REGS_OFFSET 16 |
| 1225 | #endif |
| 1226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
| 1228 | unsigned long pc) |
| 1229 | { |
| 1230 | unsigned long ip; |
| 1231 | unsigned long newsp; |
| 1232 | unsigned long marker; |
| 1233 | int count = 0; |
| 1234 | struct pt_regs regs; |
| 1235 | |
| 1236 | do { |
| 1237 | if (sp < PAGE_OFFSET) { |
| 1238 | if (sp != 0) |
| 1239 | printf("SP (%lx) is in userspace\n", sp); |
| 1240 | break; |
| 1241 | } |
| 1242 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1243 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
| 1245 | printf("Couldn't read stack frame at %lx\n", sp); |
| 1246 | break; |
| 1247 | } |
| 1248 | |
| 1249 | /* |
| 1250 | * For the first stack frame, try to work out if |
| 1251 | * LR and/or the saved LR value in the bottommost |
| 1252 | * stack frame are valid. |
| 1253 | */ |
| 1254 | if ((pc | lr) != 0) { |
| 1255 | unsigned long fnstart, fnend; |
| 1256 | unsigned long nextip; |
| 1257 | int printip = 1; |
| 1258 | |
| 1259 | get_function_bounds(pc, &fnstart, &fnend); |
| 1260 | nextip = 0; |
| 1261 | if (newsp > sp) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1262 | mread(newsp + LRSAVE_OFFSET, &nextip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | sizeof(unsigned long)); |
| 1264 | if (lr == ip) { |
| 1265 | if (lr < PAGE_OFFSET |
| 1266 | || (fnstart <= lr && lr < fnend)) |
| 1267 | printip = 0; |
| 1268 | } else if (lr == nextip) { |
| 1269 | printip = 0; |
| 1270 | } else if (lr >= PAGE_OFFSET |
| 1271 | && !(fnstart <= lr && lr < fnend)) { |
| 1272 | printf("[link register ] "); |
| 1273 | xmon_print_symbol(lr, " ", "\n"); |
| 1274 | } |
| 1275 | if (printip) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1276 | printf("["REG"] ", sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
| 1278 | } |
| 1279 | pc = lr = 0; |
| 1280 | |
| 1281 | } else { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1282 | printf("["REG"] ", sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | xmon_print_symbol(ip, " ", "\n"); |
| 1284 | } |
| 1285 | |
| 1286 | /* Look for "regshere" marker to see if this is |
| 1287 | an exception frame. */ |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1288 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
| 1289 | && marker == REG_FRAME_MARKER) { |
| 1290 | if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | != sizeof(regs)) { |
| 1292 | printf("Couldn't read registers at %lx\n", |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1293 | sp + REGS_OFFSET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | break; |
| 1295 | } |
| 1296 | printf("--- Exception: %lx %s at ", regs.trap, |
| 1297 | getvecname(TRAP(®s))); |
| 1298 | pc = regs.nip; |
| 1299 | lr = regs.link; |
| 1300 | xmon_print_symbol(pc, " ", "\n"); |
| 1301 | } |
| 1302 | |
| 1303 | if (newsp == 0) |
| 1304 | break; |
| 1305 | |
| 1306 | sp = newsp; |
| 1307 | } while (count++ < xmon_depth_to_print); |
| 1308 | } |
| 1309 | |
| 1310 | static void backtrace(struct pt_regs *excp) |
| 1311 | { |
| 1312 | unsigned long sp; |
| 1313 | |
| 1314 | if (scanhex(&sp)) |
| 1315 | xmon_show_stack(sp, 0, 0); |
| 1316 | else |
| 1317 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); |
| 1318 | scannl(); |
| 1319 | } |
| 1320 | |
| 1321 | static void print_bug_trap(struct pt_regs *regs) |
| 1322 | { |
| 1323 | struct bug_entry *bug; |
| 1324 | unsigned long addr; |
| 1325 | |
| 1326 | if (regs->msr & MSR_PR) |
| 1327 | return; /* not in kernel */ |
| 1328 | addr = regs->nip; /* address of trap instruction */ |
| 1329 | if (addr < PAGE_OFFSET) |
| 1330 | return; |
| 1331 | bug = find_bug(regs->nip); |
| 1332 | if (bug == NULL) |
| 1333 | return; |
| 1334 | if (bug->line & BUG_WARNING_TRAP) |
| 1335 | return; |
| 1336 | |
| 1337 | printf("kernel BUG in %s at %s:%d!\n", |
| 1338 | bug->function, bug->file, (unsigned int)bug->line); |
| 1339 | } |
| 1340 | |
| 1341 | void excprint(struct pt_regs *fp) |
| 1342 | { |
| 1343 | unsigned long trap; |
| 1344 | |
| 1345 | #ifdef CONFIG_SMP |
| 1346 | printf("cpu 0x%x: ", smp_processor_id()); |
| 1347 | #endif /* CONFIG_SMP */ |
| 1348 | |
| 1349 | trap = TRAP(fp); |
| 1350 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); |
| 1351 | printf(" pc: "); |
| 1352 | xmon_print_symbol(fp->nip, ": ", "\n"); |
| 1353 | |
| 1354 | printf(" lr: ", fp->link); |
| 1355 | xmon_print_symbol(fp->link, ": ", "\n"); |
| 1356 | |
| 1357 | printf(" sp: %lx\n", fp->gpr[1]); |
| 1358 | printf(" msr: %lx\n", fp->msr); |
| 1359 | |
| 1360 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { |
| 1361 | printf(" dar: %lx\n", fp->dar); |
| 1362 | if (trap != 0x380) |
| 1363 | printf(" dsisr: %lx\n", fp->dsisr); |
| 1364 | } |
| 1365 | |
| 1366 | printf(" current = 0x%lx\n", current); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1367 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | printf(" paca = 0x%lx\n", get_paca()); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1369 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | if (current) { |
| 1371 | printf(" pid = %ld, comm = %s\n", |
| 1372 | current->pid, current->comm); |
| 1373 | } |
| 1374 | |
| 1375 | if (trap == 0x700) |
| 1376 | print_bug_trap(fp); |
| 1377 | } |
| 1378 | |
| 1379 | void prregs(struct pt_regs *fp) |
| 1380 | { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1381 | int n, trap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | unsigned long base; |
| 1383 | struct pt_regs regs; |
| 1384 | |
| 1385 | if (scanhex(&base)) { |
| 1386 | if (setjmp(bus_error_jmp) == 0) { |
| 1387 | catch_memory_errors = 1; |
| 1388 | sync(); |
| 1389 | regs = *(struct pt_regs *)base; |
| 1390 | sync(); |
| 1391 | __delay(200); |
| 1392 | } else { |
| 1393 | catch_memory_errors = 0; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1394 | printf("*** Error reading registers from "REG"\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | base); |
| 1396 | return; |
| 1397 | } |
| 1398 | catch_memory_errors = 0; |
| 1399 | fp = ®s; |
| 1400 | } |
| 1401 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1402 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | if (FULL_REGS(fp)) { |
| 1404 | for (n = 0; n < 16; ++n) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1405 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
| 1407 | } else { |
| 1408 | for (n = 0; n < 7; ++n) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1409 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
| 1411 | } |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1412 | #else |
| 1413 | for (n = 0; n < 32; ++n) { |
| 1414 | printf("R%.2d = %.8x%s", n, fp->gpr[n], |
| 1415 | (n & 3) == 3? "\n": " "); |
| 1416 | if (n == 12 && !FULL_REGS(fp)) { |
| 1417 | printf("\n"); |
| 1418 | break; |
| 1419 | } |
| 1420 | } |
| 1421 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | printf("pc = "); |
| 1423 | xmon_print_symbol(fp->nip, " ", "\n"); |
| 1424 | printf("lr = "); |
| 1425 | xmon_print_symbol(fp->link, " ", "\n"); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1426 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
| 1427 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | fp->ctr, fp->xer, fp->trap); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1429 | trap = TRAP(fp); |
| 1430 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) |
| 1431 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | } |
| 1433 | |
| 1434 | void cacheflush(void) |
| 1435 | { |
| 1436 | int cmd; |
| 1437 | unsigned long nflush; |
| 1438 | |
| 1439 | cmd = inchar(); |
| 1440 | if (cmd != 'i') |
| 1441 | termch = cmd; |
| 1442 | scanhex((void *)&adrs); |
| 1443 | if (termch != '\n') |
| 1444 | termch = 0; |
| 1445 | nflush = 1; |
| 1446 | scanhex(&nflush); |
| 1447 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; |
| 1448 | if (setjmp(bus_error_jmp) == 0) { |
| 1449 | catch_memory_errors = 1; |
| 1450 | sync(); |
| 1451 | |
| 1452 | if (cmd != 'i') { |
| 1453 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) |
| 1454 | cflush((void *) adrs); |
| 1455 | } else { |
| 1456 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) |
| 1457 | cinval((void *) adrs); |
| 1458 | } |
| 1459 | sync(); |
| 1460 | /* wait a little while to see if we get a machine check */ |
| 1461 | __delay(200); |
| 1462 | } |
| 1463 | catch_memory_errors = 0; |
| 1464 | } |
| 1465 | |
| 1466 | unsigned long |
| 1467 | read_spr(int n) |
| 1468 | { |
| 1469 | unsigned int instrs[2]; |
| 1470 | unsigned long (*code)(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | unsigned long ret = -1UL; |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1472 | #ifdef CONFIG_PPC64 |
| 1473 | unsigned long opd[3]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | opd[0] = (unsigned long)instrs; |
| 1476 | opd[1] = 0; |
| 1477 | opd[2] = 0; |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1478 | code = (unsigned long (*)(void)) opd; |
| 1479 | #else |
| 1480 | code = (unsigned long (*)(void)) instrs; |
| 1481 | #endif |
| 1482 | |
| 1483 | /* mfspr r3,n; blr */ |
| 1484 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| 1485 | instrs[1] = 0x4e800020; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | store_inst(instrs); |
| 1487 | store_inst(instrs+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
| 1489 | if (setjmp(bus_error_jmp) == 0) { |
| 1490 | catch_memory_errors = 1; |
| 1491 | sync(); |
| 1492 | |
| 1493 | ret = code(); |
| 1494 | |
| 1495 | sync(); |
| 1496 | /* wait a little while to see if we get a machine check */ |
| 1497 | __delay(200); |
| 1498 | n = size; |
| 1499 | } |
| 1500 | |
| 1501 | return ret; |
| 1502 | } |
| 1503 | |
| 1504 | void |
| 1505 | write_spr(int n, unsigned long val) |
| 1506 | { |
| 1507 | unsigned int instrs[2]; |
| 1508 | unsigned long (*code)(unsigned long); |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1509 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | unsigned long opd[3]; |
| 1511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | opd[0] = (unsigned long)instrs; |
| 1513 | opd[1] = 0; |
| 1514 | opd[2] = 0; |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1515 | code = (unsigned long (*)(unsigned long)) opd; |
| 1516 | #else |
| 1517 | code = (unsigned long (*)(unsigned long)) instrs; |
| 1518 | #endif |
| 1519 | |
| 1520 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| 1521 | instrs[1] = 0x4e800020; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | store_inst(instrs); |
| 1523 | store_inst(instrs+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | |
| 1525 | if (setjmp(bus_error_jmp) == 0) { |
| 1526 | catch_memory_errors = 1; |
| 1527 | sync(); |
| 1528 | |
| 1529 | code(val); |
| 1530 | |
| 1531 | sync(); |
| 1532 | /* wait a little while to see if we get a machine check */ |
| 1533 | __delay(200); |
| 1534 | n = size; |
| 1535 | } |
| 1536 | } |
| 1537 | |
| 1538 | static unsigned long regno; |
| 1539 | extern char exc_prolog; |
| 1540 | extern char dec_exc; |
| 1541 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1542 | void super_regs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | { |
| 1544 | int cmd; |
| 1545 | unsigned long val; |
| 1546 | #ifdef CONFIG_PPC_ISERIES |
| 1547 | struct paca_struct *ptrPaca = NULL; |
| 1548 | struct lppaca *ptrLpPaca = NULL; |
| 1549 | struct ItLpRegSave *ptrLpRegSave = NULL; |
| 1550 | #endif |
| 1551 | |
| 1552 | cmd = skipbl(); |
| 1553 | if (cmd == '\n') { |
| 1554 | unsigned long sp, toc; |
| 1555 | asm("mr %0,1" : "=r" (sp) :); |
| 1556 | asm("mr %0,2" : "=r" (toc) :); |
| 1557 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1558 | printf("msr = "REG" sprg0= "REG"\n", |
| 1559 | mfmsr(), mfspr(SPRN_SPRG0)); |
| 1560 | printf("pvr = "REG" sprg1= "REG"\n", |
| 1561 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
| 1562 | printf("dec = "REG" sprg2= "REG"\n", |
| 1563 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); |
| 1564 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); |
| 1565 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | #ifdef CONFIG_PPC_ISERIES |
| 1567 | // Dump out relevant Paca data areas. |
| 1568 | printf("Paca: \n"); |
| 1569 | ptrPaca = get_paca(); |
| 1570 | |
| 1571 | printf(" Local Processor Control Area (LpPaca): \n"); |
| 1572 | ptrLpPaca = ptrPaca->lppaca_ptr; |
| 1573 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", |
| 1574 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); |
| 1575 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", |
| 1576 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); |
| 1577 | printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5); |
| 1578 | |
| 1579 | printf(" Local Processor Register Save Area (LpRegSave): \n"); |
| 1580 | ptrLpRegSave = ptrPaca->reg_save_ptr; |
| 1581 | printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", |
| 1582 | ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); |
| 1583 | printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", |
| 1584 | ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); |
| 1585 | printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", |
| 1586 | ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); |
| 1587 | #endif |
| 1588 | |
| 1589 | return; |
| 1590 | } |
| 1591 | |
| 1592 | scanhex(®no); |
| 1593 | switch (cmd) { |
| 1594 | case 'w': |
| 1595 | val = read_spr(regno); |
| 1596 | scanhex(&val); |
| 1597 | write_spr(regno, val); |
| 1598 | /* fall through */ |
| 1599 | case 'r': |
| 1600 | printf("spr %lx = %lx\n", regno, read_spr(regno)); |
| 1601 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | } |
| 1603 | scannl(); |
| 1604 | } |
| 1605 | |
| 1606 | /* |
| 1607 | * Stuff for reading and writing memory safely |
| 1608 | */ |
| 1609 | int |
| 1610 | mread(unsigned long adrs, void *buf, int size) |
| 1611 | { |
| 1612 | volatile int n; |
| 1613 | char *p, *q; |
| 1614 | |
| 1615 | n = 0; |
| 1616 | if (setjmp(bus_error_jmp) == 0) { |
| 1617 | catch_memory_errors = 1; |
| 1618 | sync(); |
| 1619 | p = (char *)adrs; |
| 1620 | q = (char *)buf; |
| 1621 | switch (size) { |
| 1622 | case 2: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1623 | *(u16 *)q = *(u16 *)p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | break; |
| 1625 | case 4: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1626 | *(u32 *)q = *(u32 *)p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | break; |
| 1628 | case 8: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1629 | *(u64 *)q = *(u64 *)p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | break; |
| 1631 | default: |
| 1632 | for( ; n < size; ++n) { |
| 1633 | *q++ = *p++; |
| 1634 | sync(); |
| 1635 | } |
| 1636 | } |
| 1637 | sync(); |
| 1638 | /* wait a little while to see if we get a machine check */ |
| 1639 | __delay(200); |
| 1640 | n = size; |
| 1641 | } |
| 1642 | catch_memory_errors = 0; |
| 1643 | return n; |
| 1644 | } |
| 1645 | |
| 1646 | int |
| 1647 | mwrite(unsigned long adrs, void *buf, int size) |
| 1648 | { |
| 1649 | volatile int n; |
| 1650 | char *p, *q; |
| 1651 | |
| 1652 | n = 0; |
| 1653 | if (setjmp(bus_error_jmp) == 0) { |
| 1654 | catch_memory_errors = 1; |
| 1655 | sync(); |
| 1656 | p = (char *) adrs; |
| 1657 | q = (char *) buf; |
| 1658 | switch (size) { |
| 1659 | case 2: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1660 | *(u16 *)p = *(u16 *)q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | break; |
| 1662 | case 4: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1663 | *(u32 *)p = *(u32 *)q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | break; |
| 1665 | case 8: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1666 | *(u64 *)p = *(u64 *)q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | break; |
| 1668 | default: |
| 1669 | for ( ; n < size; ++n) { |
| 1670 | *p++ = *q++; |
| 1671 | sync(); |
| 1672 | } |
| 1673 | } |
| 1674 | sync(); |
| 1675 | /* wait a little while to see if we get a machine check */ |
| 1676 | __delay(200); |
| 1677 | n = size; |
| 1678 | } else { |
| 1679 | printf("*** Error writing address %x\n", adrs + n); |
| 1680 | } |
| 1681 | catch_memory_errors = 0; |
| 1682 | return n; |
| 1683 | } |
| 1684 | |
| 1685 | static int fault_type; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1686 | static int fault_except; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | static char *fault_chars[] = { "--", "**", "##" }; |
| 1688 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1689 | static int handle_fault(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1691 | fault_except = TRAP(regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | switch (TRAP(regs)) { |
| 1693 | case 0x200: |
| 1694 | fault_type = 0; |
| 1695 | break; |
| 1696 | case 0x300: |
| 1697 | case 0x380: |
| 1698 | fault_type = 1; |
| 1699 | break; |
| 1700 | default: |
| 1701 | fault_type = 2; |
| 1702 | } |
| 1703 | |
| 1704 | longjmp(bus_error_jmp, 1); |
| 1705 | |
| 1706 | return 0; |
| 1707 | } |
| 1708 | |
| 1709 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) |
| 1710 | |
| 1711 | void |
| 1712 | byterev(unsigned char *val, int size) |
| 1713 | { |
| 1714 | int t; |
| 1715 | |
| 1716 | switch (size) { |
| 1717 | case 2: |
| 1718 | SWAP(val[0], val[1], t); |
| 1719 | break; |
| 1720 | case 4: |
| 1721 | SWAP(val[0], val[3], t); |
| 1722 | SWAP(val[1], val[2], t); |
| 1723 | break; |
| 1724 | case 8: /* is there really any use for this? */ |
| 1725 | SWAP(val[0], val[7], t); |
| 1726 | SWAP(val[1], val[6], t); |
| 1727 | SWAP(val[2], val[5], t); |
| 1728 | SWAP(val[3], val[4], t); |
| 1729 | break; |
| 1730 | } |
| 1731 | } |
| 1732 | |
| 1733 | static int brev; |
| 1734 | static int mnoread; |
| 1735 | |
| 1736 | static char *memex_help_string = |
| 1737 | "Memory examine command usage:\n" |
| 1738 | "m [addr] [flags] examine/change memory\n" |
| 1739 | " addr is optional. will start where left off.\n" |
| 1740 | " flags may include chars from this set:\n" |
| 1741 | " b modify by bytes (default)\n" |
| 1742 | " w modify by words (2 byte)\n" |
| 1743 | " l modify by longs (4 byte)\n" |
| 1744 | " d modify by doubleword (8 byte)\n" |
| 1745 | " r toggle reverse byte order mode\n" |
| 1746 | " n do not read memory (for i/o spaces)\n" |
| 1747 | " . ok to read (default)\n" |
| 1748 | "NOTE: flags are saved as defaults\n" |
| 1749 | ""; |
| 1750 | |
| 1751 | static char *memex_subcmd_help_string = |
| 1752 | "Memory examine subcommands:\n" |
| 1753 | " hexval write this val to current location\n" |
| 1754 | " 'string' write chars from string to this location\n" |
| 1755 | " ' increment address\n" |
| 1756 | " ^ decrement address\n" |
| 1757 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" |
| 1758 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" |
| 1759 | " ` clear no-read flag\n" |
| 1760 | " ; stay at this addr\n" |
| 1761 | " v change to byte mode\n" |
| 1762 | " w change to word (2 byte) mode\n" |
| 1763 | " l change to long (4 byte) mode\n" |
| 1764 | " u change to doubleword (8 byte) mode\n" |
| 1765 | " m addr change current addr\n" |
| 1766 | " n toggle no-read flag\n" |
| 1767 | " r toggle byte reverse flag\n" |
| 1768 | " < count back up count bytes\n" |
| 1769 | " > count skip forward count bytes\n" |
| 1770 | " x exit this mode\n" |
| 1771 | ""; |
| 1772 | |
| 1773 | void |
| 1774 | memex(void) |
| 1775 | { |
| 1776 | int cmd, inc, i, nslash; |
| 1777 | unsigned long n; |
| 1778 | unsigned char val[16]; |
| 1779 | |
| 1780 | scanhex((void *)&adrs); |
| 1781 | cmd = skipbl(); |
| 1782 | if (cmd == '?') { |
| 1783 | printf(memex_help_string); |
| 1784 | return; |
| 1785 | } else { |
| 1786 | termch = cmd; |
| 1787 | } |
| 1788 | last_cmd = "m\n"; |
| 1789 | while ((cmd = skipbl()) != '\n') { |
| 1790 | switch( cmd ){ |
| 1791 | case 'b': size = 1; break; |
| 1792 | case 'w': size = 2; break; |
| 1793 | case 'l': size = 4; break; |
| 1794 | case 'd': size = 8; break; |
| 1795 | case 'r': brev = !brev; break; |
| 1796 | case 'n': mnoread = 1; break; |
| 1797 | case '.': mnoread = 0; break; |
| 1798 | } |
| 1799 | } |
| 1800 | if( size <= 0 ) |
| 1801 | size = 1; |
| 1802 | else if( size > 8 ) |
| 1803 | size = 8; |
| 1804 | for(;;){ |
| 1805 | if (!mnoread) |
| 1806 | n = mread(adrs, val, size); |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 1807 | printf(REG"%c", adrs, brev? 'r': ' '); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | if (!mnoread) { |
| 1809 | if (brev) |
| 1810 | byterev(val, size); |
| 1811 | putchar(' '); |
| 1812 | for (i = 0; i < n; ++i) |
| 1813 | printf("%.2x", val[i]); |
| 1814 | for (; i < size; ++i) |
| 1815 | printf("%s", fault_chars[fault_type]); |
| 1816 | } |
| 1817 | putchar(' '); |
| 1818 | inc = size; |
| 1819 | nslash = 0; |
| 1820 | for(;;){ |
| 1821 | if( scanhex(&n) ){ |
| 1822 | for (i = 0; i < size; ++i) |
| 1823 | val[i] = n >> (i * 8); |
| 1824 | if (!brev) |
| 1825 | byterev(val, size); |
| 1826 | mwrite(adrs, val, size); |
| 1827 | inc = size; |
| 1828 | } |
| 1829 | cmd = skipbl(); |
| 1830 | if (cmd == '\n') |
| 1831 | break; |
| 1832 | inc = 0; |
| 1833 | switch (cmd) { |
| 1834 | case '\'': |
| 1835 | for(;;){ |
| 1836 | n = inchar(); |
| 1837 | if( n == '\\' ) |
| 1838 | n = bsesc(); |
| 1839 | else if( n == '\'' ) |
| 1840 | break; |
| 1841 | for (i = 0; i < size; ++i) |
| 1842 | val[i] = n >> (i * 8); |
| 1843 | if (!brev) |
| 1844 | byterev(val, size); |
| 1845 | mwrite(adrs, val, size); |
| 1846 | adrs += size; |
| 1847 | } |
| 1848 | adrs -= size; |
| 1849 | inc = size; |
| 1850 | break; |
| 1851 | case ',': |
| 1852 | adrs += size; |
| 1853 | break; |
| 1854 | case '.': |
| 1855 | mnoread = 0; |
| 1856 | break; |
| 1857 | case ';': |
| 1858 | break; |
| 1859 | case 'x': |
| 1860 | case EOF: |
| 1861 | scannl(); |
| 1862 | return; |
| 1863 | case 'b': |
| 1864 | case 'v': |
| 1865 | size = 1; |
| 1866 | break; |
| 1867 | case 'w': |
| 1868 | size = 2; |
| 1869 | break; |
| 1870 | case 'l': |
| 1871 | size = 4; |
| 1872 | break; |
| 1873 | case 'u': |
| 1874 | size = 8; |
| 1875 | break; |
| 1876 | case '^': |
| 1877 | adrs -= size; |
| 1878 | break; |
| 1879 | break; |
| 1880 | case '/': |
| 1881 | if (nslash > 0) |
| 1882 | adrs -= 1 << nslash; |
| 1883 | else |
| 1884 | nslash = 0; |
| 1885 | nslash += 4; |
| 1886 | adrs += 1 << nslash; |
| 1887 | break; |
| 1888 | case '\\': |
| 1889 | if (nslash < 0) |
| 1890 | adrs += 1 << -nslash; |
| 1891 | else |
| 1892 | nslash = 0; |
| 1893 | nslash -= 4; |
| 1894 | adrs -= 1 << -nslash; |
| 1895 | break; |
| 1896 | case 'm': |
| 1897 | scanhex((void *)&adrs); |
| 1898 | break; |
| 1899 | case 'n': |
| 1900 | mnoread = 1; |
| 1901 | break; |
| 1902 | case 'r': |
| 1903 | brev = !brev; |
| 1904 | break; |
| 1905 | case '<': |
| 1906 | n = size; |
| 1907 | scanhex(&n); |
| 1908 | adrs -= n; |
| 1909 | break; |
| 1910 | case '>': |
| 1911 | n = size; |
| 1912 | scanhex(&n); |
| 1913 | adrs += n; |
| 1914 | break; |
| 1915 | case '?': |
| 1916 | printf(memex_subcmd_help_string); |
| 1917 | break; |
| 1918 | } |
| 1919 | } |
| 1920 | adrs += inc; |
| 1921 | } |
| 1922 | } |
| 1923 | |
| 1924 | int |
| 1925 | bsesc(void) |
| 1926 | { |
| 1927 | int c; |
| 1928 | |
| 1929 | c = inchar(); |
| 1930 | switch( c ){ |
| 1931 | case 'n': c = '\n'; break; |
| 1932 | case 'r': c = '\r'; break; |
| 1933 | case 'b': c = '\b'; break; |
| 1934 | case 't': c = '\t'; break; |
| 1935 | } |
| 1936 | return c; |
| 1937 | } |
| 1938 | |
| 1939 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
| 1940 | || ('a' <= (c) && (c) <= 'f') \ |
| 1941 | || ('A' <= (c) && (c) <= 'F')) |
| 1942 | void |
| 1943 | dump(void) |
| 1944 | { |
| 1945 | int c; |
| 1946 | |
| 1947 | c = inchar(); |
| 1948 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
| 1949 | termch = c; |
| 1950 | scanhex((void *)&adrs); |
| 1951 | if (termch != '\n') |
| 1952 | termch = 0; |
| 1953 | if (c == 'i') { |
| 1954 | scanhex(&nidump); |
| 1955 | if (nidump == 0) |
| 1956 | nidump = 16; |
| 1957 | else if (nidump > MAX_DUMP) |
| 1958 | nidump = MAX_DUMP; |
| 1959 | adrs += ppc_inst_dump(adrs, nidump, 1); |
| 1960 | last_cmd = "di\n"; |
| 1961 | } else { |
| 1962 | scanhex(&ndump); |
| 1963 | if (ndump == 0) |
| 1964 | ndump = 64; |
| 1965 | else if (ndump > MAX_DUMP) |
| 1966 | ndump = MAX_DUMP; |
| 1967 | prdump(adrs, ndump); |
| 1968 | adrs += ndump; |
| 1969 | last_cmd = "d\n"; |
| 1970 | } |
| 1971 | } |
| 1972 | |
| 1973 | void |
| 1974 | prdump(unsigned long adrs, long ndump) |
| 1975 | { |
| 1976 | long n, m, c, r, nr; |
| 1977 | unsigned char temp[16]; |
| 1978 | |
| 1979 | for (n = ndump; n > 0;) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1980 | printf(REG, adrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | putchar(' '); |
| 1982 | r = n < 16? n: 16; |
| 1983 | nr = mread(adrs, temp, r); |
| 1984 | adrs += nr; |
| 1985 | for (m = 0; m < r; ++m) { |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 1986 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
| 1987 | putchar(' '); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | if (m < nr) |
| 1989 | printf("%.2x", temp[m]); |
| 1990 | else |
| 1991 | printf("%s", fault_chars[fault_type]); |
| 1992 | } |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 1993 | for (; m < 16; ++m) { |
| 1994 | if ((m & (sizeof(long) - 1)) == 0) |
| 1995 | putchar(' '); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | printf(" "); |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 1997 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | printf(" |"); |
| 1999 | for (m = 0; m < r; ++m) { |
| 2000 | if (m < nr) { |
| 2001 | c = temp[m]; |
| 2002 | putchar(' ' <= c && c <= '~'? c: '.'); |
| 2003 | } else |
| 2004 | putchar(' '); |
| 2005 | } |
| 2006 | n -= r; |
| 2007 | for (; m < 16; ++m) |
| 2008 | putchar(' '); |
| 2009 | printf("|\n"); |
| 2010 | if (nr < r) |
| 2011 | break; |
| 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | int |
| 2016 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
| 2017 | { |
| 2018 | int nr, dotted; |
| 2019 | unsigned long first_adr; |
| 2020 | unsigned long inst, last_inst = 0; |
| 2021 | unsigned char val[4]; |
| 2022 | |
| 2023 | dotted = 0; |
| 2024 | for (first_adr = adr; count > 0; --count, adr += 4) { |
| 2025 | nr = mread(adr, val, 4); |
| 2026 | if (nr == 0) { |
| 2027 | if (praddr) { |
| 2028 | const char *x = fault_chars[fault_type]; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2029 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | } |
| 2031 | break; |
| 2032 | } |
| 2033 | inst = GETWORD(val); |
| 2034 | if (adr > first_adr && inst == last_inst) { |
| 2035 | if (!dotted) { |
| 2036 | printf(" ...\n"); |
| 2037 | dotted = 1; |
| 2038 | } |
| 2039 | continue; |
| 2040 | } |
| 2041 | dotted = 0; |
| 2042 | last_inst = inst; |
| 2043 | if (praddr) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2044 | printf(REG" %.8x", adr, inst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | printf("\t"); |
| 2046 | print_insn_powerpc(inst, adr, 0); /* always returns 4 */ |
| 2047 | printf("\n"); |
| 2048 | } |
| 2049 | return adr - first_adr; |
| 2050 | } |
| 2051 | |
| 2052 | void |
| 2053 | print_address(unsigned long addr) |
| 2054 | { |
| 2055 | xmon_print_symbol(addr, "\t# ", ""); |
| 2056 | } |
| 2057 | |
| 2058 | |
| 2059 | /* |
| 2060 | * Memory operations - move, set, print differences |
| 2061 | */ |
| 2062 | static unsigned long mdest; /* destination address */ |
| 2063 | static unsigned long msrc; /* source address */ |
| 2064 | static unsigned long mval; /* byte value to set memory to */ |
| 2065 | static unsigned long mcount; /* # bytes to affect */ |
| 2066 | static unsigned long mdiffs; /* max # differences to print */ |
| 2067 | |
| 2068 | void |
| 2069 | memops(int cmd) |
| 2070 | { |
| 2071 | scanhex((void *)&mdest); |
| 2072 | if( termch != '\n' ) |
| 2073 | termch = 0; |
| 2074 | scanhex((void *)(cmd == 's'? &mval: &msrc)); |
| 2075 | if( termch != '\n' ) |
| 2076 | termch = 0; |
| 2077 | scanhex((void *)&mcount); |
| 2078 | switch( cmd ){ |
| 2079 | case 'm': |
| 2080 | memmove((void *)mdest, (void *)msrc, mcount); |
| 2081 | break; |
| 2082 | case 's': |
| 2083 | memset((void *)mdest, mval, mcount); |
| 2084 | break; |
| 2085 | case 'd': |
| 2086 | if( termch != '\n' ) |
| 2087 | termch = 0; |
| 2088 | scanhex((void *)&mdiffs); |
| 2089 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); |
| 2090 | break; |
| 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | void |
| 2095 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
| 2096 | { |
| 2097 | unsigned n, prt; |
| 2098 | |
| 2099 | prt = 0; |
| 2100 | for( n = nb; n > 0; --n ) |
| 2101 | if( *p1++ != *p2++ ) |
| 2102 | if( ++prt <= maxpr ) |
| 2103 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, |
| 2104 | p1[-1], p2 - 1, p2[-1]); |
| 2105 | if( prt > maxpr ) |
| 2106 | printf("Total of %d differences\n", prt); |
| 2107 | } |
| 2108 | |
| 2109 | static unsigned mend; |
| 2110 | static unsigned mask; |
| 2111 | |
| 2112 | void |
| 2113 | memlocate(void) |
| 2114 | { |
| 2115 | unsigned a, n; |
| 2116 | unsigned char val[4]; |
| 2117 | |
| 2118 | last_cmd = "ml"; |
| 2119 | scanhex((void *)&mdest); |
| 2120 | if (termch != '\n') { |
| 2121 | termch = 0; |
| 2122 | scanhex((void *)&mend); |
| 2123 | if (termch != '\n') { |
| 2124 | termch = 0; |
| 2125 | scanhex((void *)&mval); |
| 2126 | mask = ~0; |
| 2127 | if (termch != '\n') termch = 0; |
| 2128 | scanhex((void *)&mask); |
| 2129 | } |
| 2130 | } |
| 2131 | n = 0; |
| 2132 | for (a = mdest; a < mend; a += 4) { |
| 2133 | if (mread(a, val, 4) == 4 |
| 2134 | && ((GETWORD(val) ^ mval) & mask) == 0) { |
| 2135 | printf("%.16x: %.16x\n", a, GETWORD(val)); |
| 2136 | if (++n >= 10) |
| 2137 | break; |
| 2138 | } |
| 2139 | } |
| 2140 | } |
| 2141 | |
| 2142 | static unsigned long mskip = 0x1000; |
| 2143 | static unsigned long mlim = 0xffffffff; |
| 2144 | |
| 2145 | void |
| 2146 | memzcan(void) |
| 2147 | { |
| 2148 | unsigned char v; |
| 2149 | unsigned a; |
| 2150 | int ok, ook; |
| 2151 | |
| 2152 | scanhex(&mdest); |
| 2153 | if (termch != '\n') termch = 0; |
| 2154 | scanhex(&mskip); |
| 2155 | if (termch != '\n') termch = 0; |
| 2156 | scanhex(&mlim); |
| 2157 | ook = 0; |
| 2158 | for (a = mdest; a < mlim; a += mskip) { |
| 2159 | ok = mread(a, &v, 1); |
| 2160 | if (ok && !ook) { |
| 2161 | printf("%.8x .. ", a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | } else if (!ok && ook) |
| 2163 | printf("%.8x\n", a - mskip); |
| 2164 | ook = ok; |
| 2165 | if (a + mskip < a) |
| 2166 | break; |
| 2167 | } |
| 2168 | if (ook) |
| 2169 | printf("%.8x\n", a - mskip); |
| 2170 | } |
| 2171 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2172 | void proccall(void) |
| 2173 | { |
| 2174 | unsigned long args[8]; |
| 2175 | unsigned long ret; |
| 2176 | int i; |
| 2177 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, |
| 2178 | unsigned long, unsigned long, unsigned long, |
| 2179 | unsigned long, unsigned long, unsigned long); |
| 2180 | callfunc_t func; |
| 2181 | |
| 2182 | if (!scanhex(&adrs)) |
| 2183 | return; |
| 2184 | if (termch != '\n') |
| 2185 | termch = 0; |
| 2186 | for (i = 0; i < 8; ++i) |
| 2187 | args[i] = 0; |
| 2188 | for (i = 0; i < 8; ++i) { |
| 2189 | if (!scanhex(&args[i]) || termch == '\n') |
| 2190 | break; |
| 2191 | termch = 0; |
| 2192 | } |
| 2193 | func = (callfunc_t) adrs; |
| 2194 | ret = 0; |
| 2195 | if (setjmp(bus_error_jmp) == 0) { |
| 2196 | catch_memory_errors = 1; |
| 2197 | sync(); |
| 2198 | ret = func(args[0], args[1], args[2], args[3], |
| 2199 | args[4], args[5], args[6], args[7]); |
| 2200 | sync(); |
| 2201 | printf("return value is %x\n", ret); |
| 2202 | } else { |
| 2203 | printf("*** %x exception occurred\n", fault_except); |
| 2204 | } |
| 2205 | catch_memory_errors = 0; |
| 2206 | } |
| 2207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | /* Input scanning routines */ |
| 2209 | int |
| 2210 | skipbl(void) |
| 2211 | { |
| 2212 | int c; |
| 2213 | |
| 2214 | if( termch != 0 ){ |
| 2215 | c = termch; |
| 2216 | termch = 0; |
| 2217 | } else |
| 2218 | c = inchar(); |
| 2219 | while( c == ' ' || c == '\t' ) |
| 2220 | c = inchar(); |
| 2221 | return c; |
| 2222 | } |
| 2223 | |
| 2224 | #define N_PTREGS 44 |
| 2225 | static char *regnames[N_PTREGS] = { |
| 2226 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 2227 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 2228 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
| 2229 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2230 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
| 2231 | #ifdef CONFIG_PPC64 |
| 2232 | "softe", |
| 2233 | #else |
| 2234 | "mq", |
| 2235 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | "trap", "dar", "dsisr", "res" |
| 2237 | }; |
| 2238 | |
| 2239 | int |
| 2240 | scanhex(unsigned long *vp) |
| 2241 | { |
| 2242 | int c, d; |
| 2243 | unsigned long v; |
| 2244 | |
| 2245 | c = skipbl(); |
| 2246 | if (c == '%') { |
| 2247 | /* parse register name */ |
| 2248 | char regname[8]; |
| 2249 | int i; |
| 2250 | |
| 2251 | for (i = 0; i < sizeof(regname) - 1; ++i) { |
| 2252 | c = inchar(); |
| 2253 | if (!isalnum(c)) { |
| 2254 | termch = c; |
| 2255 | break; |
| 2256 | } |
| 2257 | regname[i] = c; |
| 2258 | } |
| 2259 | regname[i] = 0; |
| 2260 | for (i = 0; i < N_PTREGS; ++i) { |
| 2261 | if (strcmp(regnames[i], regname) == 0) { |
| 2262 | if (xmon_regs == NULL) { |
| 2263 | printf("regs not available\n"); |
| 2264 | return 0; |
| 2265 | } |
| 2266 | *vp = ((unsigned long *)xmon_regs)[i]; |
| 2267 | return 1; |
| 2268 | } |
| 2269 | } |
| 2270 | printf("invalid register name '%%%s'\n", regname); |
| 2271 | return 0; |
| 2272 | } |
| 2273 | |
| 2274 | /* skip leading "0x" if any */ |
| 2275 | |
| 2276 | if (c == '0') { |
| 2277 | c = inchar(); |
| 2278 | if (c == 'x') { |
| 2279 | c = inchar(); |
| 2280 | } else { |
| 2281 | d = hexdigit(c); |
| 2282 | if (d == EOF) { |
| 2283 | termch = c; |
| 2284 | *vp = 0; |
| 2285 | return 1; |
| 2286 | } |
| 2287 | } |
| 2288 | } else if (c == '$') { |
| 2289 | int i; |
| 2290 | for (i=0; i<63; i++) { |
| 2291 | c = inchar(); |
| 2292 | if (isspace(c)) { |
| 2293 | termch = c; |
| 2294 | break; |
| 2295 | } |
| 2296 | tmpstr[i] = c; |
| 2297 | } |
| 2298 | tmpstr[i++] = 0; |
Benjamin Herrenschmidt | 6879dc1 | 2005-06-21 17:15:30 -0700 | [diff] [blame] | 2299 | *vp = 0; |
| 2300 | if (setjmp(bus_error_jmp) == 0) { |
| 2301 | catch_memory_errors = 1; |
| 2302 | sync(); |
| 2303 | *vp = kallsyms_lookup_name(tmpstr); |
| 2304 | sync(); |
| 2305 | } |
| 2306 | catch_memory_errors = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | if (!(*vp)) { |
| 2308 | printf("unknown symbol '%s'\n", tmpstr); |
| 2309 | return 0; |
| 2310 | } |
| 2311 | return 1; |
| 2312 | } |
| 2313 | |
| 2314 | d = hexdigit(c); |
| 2315 | if (d == EOF) { |
| 2316 | termch = c; |
| 2317 | return 0; |
| 2318 | } |
| 2319 | v = 0; |
| 2320 | do { |
| 2321 | v = (v << 4) + d; |
| 2322 | c = inchar(); |
| 2323 | d = hexdigit(c); |
| 2324 | } while (d != EOF); |
| 2325 | termch = c; |
| 2326 | *vp = v; |
| 2327 | return 1; |
| 2328 | } |
| 2329 | |
| 2330 | void |
| 2331 | scannl(void) |
| 2332 | { |
| 2333 | int c; |
| 2334 | |
| 2335 | c = termch; |
| 2336 | termch = 0; |
| 2337 | while( c != '\n' ) |
| 2338 | c = inchar(); |
| 2339 | } |
| 2340 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2341 | int hexdigit(int c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | { |
| 2343 | if( '0' <= c && c <= '9' ) |
| 2344 | return c - '0'; |
| 2345 | if( 'A' <= c && c <= 'F' ) |
| 2346 | return c - ('A' - 10); |
| 2347 | if( 'a' <= c && c <= 'f' ) |
| 2348 | return c - ('a' - 10); |
| 2349 | return EOF; |
| 2350 | } |
| 2351 | |
| 2352 | void |
| 2353 | getstring(char *s, int size) |
| 2354 | { |
| 2355 | int c; |
| 2356 | |
| 2357 | c = skipbl(); |
| 2358 | do { |
| 2359 | if( size > 1 ){ |
| 2360 | *s++ = c; |
| 2361 | --size; |
| 2362 | } |
| 2363 | c = inchar(); |
| 2364 | } while( c != ' ' && c != '\t' && c != '\n' ); |
| 2365 | termch = c; |
| 2366 | *s = 0; |
| 2367 | } |
| 2368 | |
| 2369 | static char line[256]; |
| 2370 | static char *lineptr; |
| 2371 | |
| 2372 | void |
| 2373 | flush_input(void) |
| 2374 | { |
| 2375 | lineptr = NULL; |
| 2376 | } |
| 2377 | |
| 2378 | int |
| 2379 | inchar(void) |
| 2380 | { |
| 2381 | if (lineptr == NULL || *lineptr == 0) { |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2382 | if (xmon_gets(line, sizeof(line)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2383 | lineptr = NULL; |
| 2384 | return EOF; |
| 2385 | } |
| 2386 | lineptr = line; |
| 2387 | } |
| 2388 | return *lineptr++; |
| 2389 | } |
| 2390 | |
| 2391 | void |
| 2392 | take_input(char *str) |
| 2393 | { |
| 2394 | lineptr = str; |
| 2395 | } |
| 2396 | |
| 2397 | |
| 2398 | static void |
| 2399 | symbol_lookup(void) |
| 2400 | { |
| 2401 | int type = inchar(); |
| 2402 | unsigned long addr; |
| 2403 | static char tmp[64]; |
| 2404 | |
| 2405 | switch (type) { |
| 2406 | case 'a': |
| 2407 | if (scanhex(&addr)) |
| 2408 | xmon_print_symbol(addr, ": ", "\n"); |
| 2409 | termch = 0; |
| 2410 | break; |
| 2411 | case 's': |
| 2412 | getstring(tmp, 64); |
| 2413 | if (setjmp(bus_error_jmp) == 0) { |
| 2414 | catch_memory_errors = 1; |
| 2415 | sync(); |
| 2416 | addr = kallsyms_lookup_name(tmp); |
| 2417 | if (addr) |
| 2418 | printf("%s: %lx\n", tmp, addr); |
| 2419 | else |
| 2420 | printf("Symbol '%s' not found.\n", tmp); |
| 2421 | sync(); |
| 2422 | } |
| 2423 | catch_memory_errors = 0; |
| 2424 | termch = 0; |
| 2425 | break; |
| 2426 | } |
| 2427 | } |
| 2428 | |
| 2429 | |
| 2430 | /* Print an address in numeric and symbolic form (if possible) */ |
| 2431 | static void xmon_print_symbol(unsigned long address, const char *mid, |
| 2432 | const char *after) |
| 2433 | { |
| 2434 | char *modname; |
| 2435 | const char *name = NULL; |
| 2436 | unsigned long offset, size; |
| 2437 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2438 | printf(REG, address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | if (setjmp(bus_error_jmp) == 0) { |
| 2440 | catch_memory_errors = 1; |
| 2441 | sync(); |
| 2442 | name = kallsyms_lookup(address, &size, &offset, &modname, |
| 2443 | tmpstr); |
| 2444 | sync(); |
| 2445 | /* wait a little while to see if we get a machine check */ |
| 2446 | __delay(200); |
| 2447 | } |
| 2448 | |
| 2449 | catch_memory_errors = 0; |
| 2450 | |
| 2451 | if (name) { |
| 2452 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); |
| 2453 | if (modname) |
| 2454 | printf(" [%s]", modname); |
| 2455 | } |
| 2456 | printf("%s", after); |
| 2457 | } |
| 2458 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2459 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | static void dump_slb(void) |
| 2461 | { |
| 2462 | int i; |
| 2463 | unsigned long tmp; |
| 2464 | |
| 2465 | printf("SLB contents of cpu %x\n", smp_processor_id()); |
| 2466 | |
| 2467 | for (i = 0; i < SLB_NUM_ENTRIES; i++) { |
| 2468 | asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); |
| 2469 | printf("%02d %016lx ", i, tmp); |
| 2470 | |
| 2471 | asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); |
| 2472 | printf("%016lx\n", tmp); |
| 2473 | } |
| 2474 | } |
| 2475 | |
| 2476 | static void dump_stab(void) |
| 2477 | { |
| 2478 | int i; |
| 2479 | unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; |
| 2480 | |
| 2481 | printf("Segment table contents of cpu %x\n", smp_processor_id()); |
| 2482 | |
| 2483 | for (i = 0; i < PAGE_SIZE/16; i++) { |
| 2484 | unsigned long a, b; |
| 2485 | |
| 2486 | a = *tmp++; |
| 2487 | b = *tmp++; |
| 2488 | |
| 2489 | if (a || b) { |
| 2490 | printf("%03d %016lx ", i, a); |
| 2491 | printf("%016lx\n", b); |
| 2492 | } |
| 2493 | } |
| 2494 | } |
| 2495 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2496 | void dump_segments(void) |
| 2497 | { |
| 2498 | if (cpu_has_feature(CPU_FTR_SLB)) |
| 2499 | dump_slb(); |
| 2500 | else |
| 2501 | dump_stab(); |
| 2502 | } |
| 2503 | #endif |
| 2504 | |
| 2505 | #ifdef CONFIG_PPC_STD_MMU_32 |
| 2506 | void dump_segments(void) |
| 2507 | { |
| 2508 | int i; |
| 2509 | |
| 2510 | printf("sr0-15 ="); |
| 2511 | for (i = 0; i < 16; ++i) |
| 2512 | printf(" %x", mfsrin(i)); |
| 2513 | printf("\n"); |
| 2514 | } |
| 2515 | #endif |
| 2516 | |
Olaf Hering | b13cfd17 | 2005-08-04 19:26:42 +0200 | [diff] [blame] | 2517 | void xmon_init(int enable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | { |
Olaf Hering | b13cfd17 | 2005-08-04 19:26:42 +0200 | [diff] [blame] | 2519 | if (enable) { |
| 2520 | __debugger = xmon; |
| 2521 | __debugger_ipi = xmon_ipi; |
| 2522 | __debugger_bpt = xmon_bpt; |
| 2523 | __debugger_sstep = xmon_sstep; |
| 2524 | __debugger_iabr_match = xmon_iabr_match; |
| 2525 | __debugger_dabr_match = xmon_dabr_match; |
| 2526 | __debugger_fault_handler = xmon_fault_handler; |
| 2527 | } else { |
| 2528 | __debugger = NULL; |
| 2529 | __debugger_ipi = NULL; |
| 2530 | __debugger_bpt = NULL; |
| 2531 | __debugger_sstep = NULL; |
| 2532 | __debugger_iabr_match = NULL; |
| 2533 | __debugger_dabr_match = NULL; |
| 2534 | __debugger_fault_handler = NULL; |
| 2535 | } |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2536 | xmon_map_scc(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | } |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2538 | |
| 2539 | #ifdef CONFIG_MAGIC_SYSRQ |
| 2540 | static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs, |
| 2541 | struct tty_struct *tty) |
| 2542 | { |
| 2543 | /* ensure xmon is enabled */ |
| 2544 | xmon_init(1); |
| 2545 | debugger(pt_regs); |
| 2546 | } |
| 2547 | |
| 2548 | static struct sysrq_key_op sysrq_xmon_op = |
| 2549 | { |
| 2550 | .handler = sysrq_handle_xmon, |
| 2551 | .help_msg = "Xmon", |
| 2552 | .action_msg = "Entering xmon", |
| 2553 | }; |
| 2554 | |
| 2555 | static int __init setup_xmon_sysrq(void) |
| 2556 | { |
| 2557 | register_sysrq_key('x', &sysrq_xmon_op); |
| 2558 | return 0; |
| 2559 | } |
| 2560 | __initcall(setup_xmon_sysrq); |
| 2561 | #endif /* CONFIG_MAGIC_SYSRQ */ |