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. |
Michael Ellerman | 47679283 | 2006-10-03 14:12:08 +1000 | [diff] [blame] | 5 | * Copyright (C) 2001 PPC64 Team, IBM Corp |
| 6 | * Copyrignt (C) 2006 Michael Ellerman, IBM Corp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/errno.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/smp.h> |
| 16 | #include <linux/mm.h> |
| 17 | #include <linux/reboot.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/kallsyms.h> |
| 20 | #include <linux/cpumask.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 21 | #include <linux/module.h> |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 22 | #include <linux/sysrq.h> |
Andrew Morton | 4694ca0 | 2005-11-13 16:06:50 -0800 | [diff] [blame] | 23 | #include <linux/interrupt.h> |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 24 | #include <linux/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #include <asm/ptrace.h> |
| 27 | #include <asm/string.h> |
| 28 | #include <asm/prom.h> |
| 29 | #include <asm/machdep.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 30 | #include <asm/xmon.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/processor.h> |
| 32 | #include <asm/pgtable.h> |
| 33 | #include <asm/mmu.h> |
| 34 | #include <asm/mmu_context.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/cputable.h> |
| 36 | #include <asm/rtas.h> |
| 37 | #include <asm/sstep.h> |
| 38 | #include <asm/bug.h> |
Paul Mackerras | f583ffc | 2006-10-10 11:47:07 +1000 | [diff] [blame] | 39 | #include <asm/irq_regs.h> |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 40 | #include <asm/spu.h> |
| 41 | #include <asm/spu_priv1.h> |
Stephen Rothwell | 1d13581 | 2006-11-13 14:50:28 +1100 | [diff] [blame^] | 42 | #include <asm/firmware.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 43 | |
| 44 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <asm/hvcall.h> |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 46 | #include <asm/paca.h> |
| 47 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include "nonstdio.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #define scanhex xmon_scanhex |
| 52 | #define skipbl xmon_skipbl |
| 53 | |
| 54 | #ifdef CONFIG_SMP |
| 55 | cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
| 56 | static unsigned long xmon_taken = 1; |
| 57 | static int xmon_owner; |
| 58 | static int xmon_gate; |
| 59 | #endif /* CONFIG_SMP */ |
| 60 | |
| 61 | static unsigned long in_xmon = 0; |
| 62 | |
| 63 | static unsigned long adrs; |
| 64 | static int size = 1; |
| 65 | #define MAX_DUMP (128 * 1024) |
| 66 | static unsigned long ndump = 64; |
| 67 | static unsigned long nidump = 16; |
| 68 | static unsigned long ncsum = 4096; |
| 69 | static int termch; |
| 70 | static char tmpstr[128]; |
| 71 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 72 | #define JMP_BUF_LEN 23 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | static long bus_error_jmp[JMP_BUF_LEN]; |
| 74 | static int catch_memory_errors; |
| 75 | static long *xmon_fault_jmp[NR_CPUS]; |
| 76 | #define setjmp xmon_setjmp |
| 77 | #define longjmp xmon_longjmp |
| 78 | |
| 79 | /* Breakpoint stuff */ |
| 80 | struct bpt { |
| 81 | unsigned long address; |
| 82 | unsigned int instr[2]; |
| 83 | atomic_t ref_count; |
| 84 | int enabled; |
| 85 | unsigned long pad; |
| 86 | }; |
| 87 | |
| 88 | /* Bits in bpt.enabled */ |
| 89 | #define BP_IABR_TE 1 /* IABR translation enabled */ |
| 90 | #define BP_IABR 2 |
| 91 | #define BP_TRAP 8 |
| 92 | #define BP_DABR 0x10 |
| 93 | |
| 94 | #define NBPTS 256 |
| 95 | static struct bpt bpts[NBPTS]; |
| 96 | static struct bpt dabr; |
| 97 | static struct bpt *iabr; |
| 98 | static unsigned bpinstr = 0x7fe00008; /* trap */ |
| 99 | |
| 100 | #define BP_NUM(bp) ((bp) - bpts + 1) |
| 101 | |
| 102 | /* Prototypes */ |
| 103 | static int cmds(struct pt_regs *); |
| 104 | static int mread(unsigned long, void *, int); |
| 105 | static int mwrite(unsigned long, void *, int); |
| 106 | static int handle_fault(struct pt_regs *); |
| 107 | static void byterev(unsigned char *, int); |
| 108 | static void memex(void); |
| 109 | static int bsesc(void); |
| 110 | static void dump(void); |
| 111 | static void prdump(unsigned long, long); |
| 112 | static int ppc_inst_dump(unsigned long, long, int); |
| 113 | void print_address(unsigned long); |
| 114 | static void backtrace(struct pt_regs *); |
| 115 | static void excprint(struct pt_regs *); |
| 116 | static void prregs(struct pt_regs *); |
| 117 | static void memops(int); |
| 118 | static void memlocate(void); |
| 119 | static void memzcan(void); |
| 120 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); |
| 121 | int skipbl(void); |
| 122 | int scanhex(unsigned long *valp); |
| 123 | static void scannl(void); |
| 124 | static int hexdigit(int); |
| 125 | void getstring(char *, int); |
| 126 | static void flush_input(void); |
| 127 | static int inchar(void); |
| 128 | static void take_input(char *); |
| 129 | static unsigned long read_spr(int); |
| 130 | static void write_spr(int, unsigned long); |
| 131 | static void super_regs(void); |
| 132 | static void remove_bpts(void); |
| 133 | static void insert_bpts(void); |
| 134 | static void remove_cpu_bpts(void); |
| 135 | static void insert_cpu_bpts(void); |
| 136 | static struct bpt *at_breakpoint(unsigned long pc); |
| 137 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); |
| 138 | static int do_step(struct pt_regs *); |
| 139 | static void bpt_cmds(void); |
| 140 | static void cacheflush(void); |
| 141 | static int cpu_cmd(void); |
| 142 | static void csum(void); |
| 143 | static void bootcmds(void); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 144 | static void proccall(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | void dump_segments(void); |
| 146 | static void symbol_lookup(void); |
Olaf Hering | 26c8af5 | 2006-09-08 16:29:21 +0200 | [diff] [blame] | 147 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
| 148 | unsigned long pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | static void xmon_print_symbol(unsigned long address, const char *mid, |
| 150 | const char *after); |
| 151 | static const char *getvecname(unsigned long vec); |
| 152 | |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 153 | static int do_spu_cmd(void); |
| 154 | |
Olaf Hering | 26c8af5 | 2006-09-08 16:29:21 +0200 | [diff] [blame] | 155 | int xmon_no_auto_backtrace; |
| 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | extern int print_insn_powerpc(unsigned long, unsigned long, int); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 158 | |
| 159 | extern void xmon_enter(void); |
| 160 | extern void xmon_leave(void); |
| 161 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 162 | extern long setjmp(long *); |
| 163 | extern void longjmp(long *, long); |
| 164 | extern void xmon_save_regs(struct pt_regs *); |
| 165 | |
| 166 | #ifdef CONFIG_PPC64 |
| 167 | #define REG "%.16lx" |
| 168 | #define REGS_PER_LINE 4 |
| 169 | #define LAST_VOLATILE 13 |
| 170 | #else |
| 171 | #define REG "%.8lx" |
| 172 | #define REGS_PER_LINE 8 |
| 173 | #define LAST_VOLATILE 12 |
| 174 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
| 177 | |
| 178 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
| 179 | || ('a' <= (c) && (c) <= 'f') \ |
| 180 | || ('A' <= (c) && (c) <= 'F')) |
| 181 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ |
| 182 | || ('a' <= (c) && (c) <= 'z') \ |
| 183 | || ('A' <= (c) && (c) <= 'Z')) |
| 184 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) |
| 185 | |
| 186 | static char *help_string = "\ |
| 187 | Commands:\n\ |
| 188 | b show breakpoints\n\ |
| 189 | bd set data breakpoint\n\ |
| 190 | bi set instruction breakpoint\n\ |
| 191 | bc clear breakpoint\n" |
| 192 | #ifdef CONFIG_SMP |
| 193 | "\ |
| 194 | c print cpus stopped in xmon\n\ |
| 195 | c# try to switch to cpu number h (in hex)\n" |
| 196 | #endif |
| 197 | "\ |
| 198 | C checksum\n\ |
| 199 | d dump bytes\n\ |
| 200 | di dump instructions\n\ |
| 201 | df dump float values\n\ |
| 202 | dd dump double values\n\ |
Olaf Hering | 7e5b593 | 2006-03-08 20:40:28 +0100 | [diff] [blame] | 203 | dr dump stream of raw bytes\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | e print exception information\n\ |
| 205 | f flush cache\n\ |
| 206 | la lookup symbol+offset of specified address\n\ |
| 207 | ls lookup address of specified symbol\n\ |
| 208 | m examine/change memory\n\ |
| 209 | mm move a block of memory\n\ |
| 210 | ms set a block of memory\n\ |
| 211 | md compare two blocks of memory\n\ |
| 212 | ml locate a block of memory\n\ |
| 213 | mz zero a block of memory\n\ |
| 214 | mi show information about memory allocation\n\ |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 215 | p call a procedure\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | r print registers\n\ |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 217 | s single step\n" |
| 218 | #ifdef CONFIG_PPC_CELL |
| 219 | " ss stop execution on all spus\n\ |
Michael Ellerman | a898497 | 2006-10-24 18:31:28 +0200 | [diff] [blame] | 220 | sr restore execution on stopped spus\n\ |
| 221 | sf # dump spu fields for spu # (in hex)\n" |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 222 | #endif |
| 223 | " S print special registers\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | t print backtrace\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | x exit monitor and recover\n\ |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 226 | X exit monitor and dont recover\n" |
| 227 | #ifdef CONFIG_PPC64 |
| 228 | " u dump segment table or SLB\n" |
| 229 | #endif |
| 230 | #ifdef CONFIG_PPC_STD_MMU_32 |
| 231 | " u dump segment registers\n" |
| 232 | #endif |
| 233 | " ? help\n" |
| 234 | " zr reboot\n\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | zh halt\n" |
| 236 | ; |
| 237 | |
| 238 | static struct pt_regs *xmon_regs; |
| 239 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 240 | static inline void sync(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
| 242 | asm volatile("sync; isync"); |
| 243 | } |
| 244 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 245 | static inline void store_inst(void *p) |
| 246 | { |
| 247 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); |
| 248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 250 | static inline void cflush(void *p) |
| 251 | { |
| 252 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); |
| 253 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 255 | static inline void cinval(void *p) |
| 256 | { |
| 257 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); |
| 258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | /* |
| 261 | * Disable surveillance (the service processor watchdog function) |
| 262 | * while we are in xmon. |
| 263 | * XXX we should re-enable it when we leave. :) |
| 264 | */ |
| 265 | #define SURVEILLANCE_TOKEN 9000 |
| 266 | |
| 267 | static inline void disable_surveillance(void) |
| 268 | { |
| 269 | #ifdef CONFIG_PPC_PSERIES |
| 270 | /* Since this can't be a module, args should end up below 4GB. */ |
| 271 | static struct rtas_args args; |
| 272 | |
| 273 | /* |
| 274 | * At this point we have got all the cpus we can into |
| 275 | * xmon, so there is hopefully no other cpu calling RTAS |
| 276 | * at the moment, even though we don't take rtas.lock. |
| 277 | * If we did try to take rtas.lock there would be a |
| 278 | * real possibility of deadlock. |
| 279 | */ |
| 280 | args.token = rtas_token("set-indicator"); |
| 281 | if (args.token == RTAS_UNKNOWN_SERVICE) |
| 282 | return; |
| 283 | args.nargs = 3; |
| 284 | args.nret = 1; |
| 285 | args.rets = &args.args[3]; |
| 286 | args.args[0] = SURVEILLANCE_TOKEN; |
| 287 | args.args[1] = 0; |
| 288 | args.args[2] = 0; |
| 289 | enter_rtas(__pa(&args)); |
| 290 | #endif /* CONFIG_PPC_PSERIES */ |
| 291 | } |
| 292 | |
| 293 | #ifdef CONFIG_SMP |
| 294 | static int xmon_speaker; |
| 295 | |
| 296 | static void get_output_lock(void) |
| 297 | { |
| 298 | int me = smp_processor_id() + 0x100; |
| 299 | int last_speaker = 0, prev; |
| 300 | long timeout; |
| 301 | |
| 302 | if (xmon_speaker == me) |
| 303 | return; |
| 304 | for (;;) { |
| 305 | if (xmon_speaker == 0) { |
| 306 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
| 307 | if (last_speaker == 0) |
| 308 | return; |
| 309 | } |
| 310 | timeout = 10000000; |
| 311 | while (xmon_speaker == last_speaker) { |
| 312 | if (--timeout > 0) |
| 313 | continue; |
| 314 | /* hostile takeover */ |
| 315 | prev = cmpxchg(&xmon_speaker, last_speaker, me); |
| 316 | if (prev == last_speaker) |
| 317 | return; |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | static void release_output_lock(void) |
| 324 | { |
| 325 | xmon_speaker = 0; |
| 326 | } |
| 327 | #endif |
| 328 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 329 | static int xmon_core(struct pt_regs *regs, int fromipi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
| 331 | int cmd = 0; |
| 332 | unsigned long msr; |
| 333 | struct bpt *bp; |
| 334 | long recurse_jmp[JMP_BUF_LEN]; |
| 335 | unsigned long offset; |
| 336 | #ifdef CONFIG_SMP |
| 337 | int cpu; |
| 338 | int secondary; |
| 339 | unsigned long timeout; |
| 340 | #endif |
| 341 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 342 | msr = mfmsr(); |
| 343 | mtmsr(msr & ~MSR_EE); /* disable interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
| 345 | bp = in_breakpoint_table(regs->nip, &offset); |
| 346 | if (bp != NULL) { |
| 347 | regs->nip = bp->address + offset; |
| 348 | atomic_dec(&bp->ref_count); |
| 349 | } |
| 350 | |
| 351 | remove_cpu_bpts(); |
| 352 | |
| 353 | #ifdef CONFIG_SMP |
| 354 | cpu = smp_processor_id(); |
| 355 | if (cpu_isset(cpu, cpus_in_xmon)) { |
| 356 | get_output_lock(); |
| 357 | excprint(regs); |
| 358 | printf("cpu 0x%x: Exception %lx %s in xmon, " |
| 359 | "returning to main loop\n", |
| 360 | cpu, regs->trap, getvecname(TRAP(regs))); |
Haren Myneni | 5cb4cc0 | 2005-08-03 15:08:18 +1000 | [diff] [blame] | 361 | release_output_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | longjmp(xmon_fault_jmp[cpu], 1); |
| 363 | } |
| 364 | |
| 365 | if (setjmp(recurse_jmp) != 0) { |
| 366 | if (!in_xmon || !xmon_gate) { |
Haren Myneni | 5cb4cc0 | 2005-08-03 15:08:18 +1000 | [diff] [blame] | 367 | get_output_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | printf("xmon: WARNING: bad recursive fault " |
| 369 | "on cpu 0x%x\n", cpu); |
Haren Myneni | 5cb4cc0 | 2005-08-03 15:08:18 +1000 | [diff] [blame] | 370 | release_output_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | goto waiting; |
| 372 | } |
| 373 | secondary = !(xmon_taken && cpu == xmon_owner); |
| 374 | goto cmdloop; |
| 375 | } |
| 376 | |
| 377 | xmon_fault_jmp[cpu] = recurse_jmp; |
| 378 | cpu_set(cpu, cpus_in_xmon); |
| 379 | |
| 380 | bp = NULL; |
| 381 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) |
| 382 | bp = at_breakpoint(regs->nip); |
| 383 | if (bp || (regs->msr & MSR_RI) == 0) |
| 384 | fromipi = 0; |
| 385 | |
| 386 | if (!fromipi) { |
| 387 | get_output_lock(); |
| 388 | excprint(regs); |
| 389 | if (bp) { |
| 390 | printf("cpu 0x%x stopped at breakpoint 0x%x (", |
| 391 | cpu, BP_NUM(bp)); |
| 392 | xmon_print_symbol(regs->nip, " ", ")\n"); |
| 393 | } |
| 394 | if ((regs->msr & MSR_RI) == 0) |
| 395 | printf("WARNING: exception is not recoverable, " |
| 396 | "can't continue\n"); |
| 397 | release_output_lock(); |
| 398 | } |
| 399 | |
| 400 | waiting: |
| 401 | secondary = 1; |
| 402 | while (secondary && !xmon_gate) { |
| 403 | if (in_xmon == 0) { |
| 404 | if (fromipi) |
| 405 | goto leave; |
| 406 | secondary = test_and_set_bit(0, &in_xmon); |
| 407 | } |
| 408 | barrier(); |
| 409 | } |
| 410 | |
| 411 | if (!secondary && !xmon_gate) { |
| 412 | /* we are the first cpu to come in */ |
| 413 | /* interrupt other cpu(s) */ |
| 414 | int ncpus = num_online_cpus(); |
| 415 | |
| 416 | xmon_owner = cpu; |
| 417 | mb(); |
| 418 | if (ncpus > 1) { |
| 419 | smp_send_debugger_break(MSG_ALL_BUT_SELF); |
| 420 | /* wait for other cpus to come in */ |
| 421 | for (timeout = 100000000; timeout != 0; --timeout) { |
| 422 | if (cpus_weight(cpus_in_xmon) >= ncpus) |
| 423 | break; |
| 424 | barrier(); |
| 425 | } |
| 426 | } |
| 427 | remove_bpts(); |
| 428 | disable_surveillance(); |
| 429 | /* for breakpoint or single step, print the current instr. */ |
| 430 | if (bp || TRAP(regs) == 0xd00) |
| 431 | ppc_inst_dump(regs->nip, 1, 0); |
| 432 | printf("enter ? for help\n"); |
| 433 | mb(); |
| 434 | xmon_gate = 1; |
| 435 | barrier(); |
| 436 | } |
| 437 | |
| 438 | cmdloop: |
| 439 | while (in_xmon) { |
| 440 | if (secondary) { |
| 441 | if (cpu == xmon_owner) { |
| 442 | if (!test_and_set_bit(0, &xmon_taken)) { |
| 443 | secondary = 0; |
| 444 | continue; |
| 445 | } |
| 446 | /* missed it */ |
| 447 | while (cpu == xmon_owner) |
| 448 | barrier(); |
| 449 | } |
| 450 | barrier(); |
| 451 | } else { |
| 452 | cmd = cmds(regs); |
| 453 | if (cmd != 0) { |
| 454 | /* exiting xmon */ |
| 455 | insert_bpts(); |
| 456 | xmon_gate = 0; |
| 457 | wmb(); |
| 458 | in_xmon = 0; |
| 459 | break; |
| 460 | } |
| 461 | /* have switched to some other cpu */ |
| 462 | secondary = 1; |
| 463 | } |
| 464 | } |
| 465 | leave: |
| 466 | cpu_clear(cpu, cpus_in_xmon); |
| 467 | xmon_fault_jmp[cpu] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | #else |
| 469 | /* UP is simple... */ |
| 470 | if (in_xmon) { |
| 471 | printf("Exception %lx %s in xmon, returning to main loop\n", |
| 472 | regs->trap, getvecname(TRAP(regs))); |
| 473 | longjmp(xmon_fault_jmp[0], 1); |
| 474 | } |
| 475 | if (setjmp(recurse_jmp) == 0) { |
| 476 | xmon_fault_jmp[0] = recurse_jmp; |
| 477 | in_xmon = 1; |
| 478 | |
| 479 | excprint(regs); |
| 480 | bp = at_breakpoint(regs->nip); |
| 481 | if (bp) { |
| 482 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); |
| 483 | xmon_print_symbol(regs->nip, " ", ")\n"); |
| 484 | } |
| 485 | if ((regs->msr & MSR_RI) == 0) |
| 486 | printf("WARNING: exception is not recoverable, " |
| 487 | "can't continue\n"); |
| 488 | remove_bpts(); |
| 489 | disable_surveillance(); |
| 490 | /* for breakpoint or single step, print the current instr. */ |
| 491 | if (bp || TRAP(regs) == 0xd00) |
| 492 | ppc_inst_dump(regs->nip, 1, 0); |
| 493 | printf("enter ? for help\n"); |
| 494 | } |
| 495 | |
| 496 | cmd = cmds(regs); |
| 497 | |
| 498 | insert_bpts(); |
| 499 | in_xmon = 0; |
| 500 | #endif |
| 501 | |
| 502 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { |
| 503 | bp = at_breakpoint(regs->nip); |
| 504 | if (bp != NULL) { |
| 505 | int stepped = emulate_step(regs, bp->instr[0]); |
| 506 | if (stepped == 0) { |
| 507 | regs->nip = (unsigned long) &bp->instr[0]; |
| 508 | atomic_inc(&bp->ref_count); |
| 509 | } else if (stepped < 0) { |
| 510 | printf("Couldn't single-step %s instruction\n", |
| 511 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | insert_cpu_bpts(); |
| 517 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 518 | mtmsr(msr); /* restore interrupt enable */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Paul Mackerras | 0a730ae | 2006-10-03 21:32:49 +1000 | [diff] [blame] | 520 | return cmd != 'X' && cmd != EOF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | int xmon(struct pt_regs *excp) |
| 524 | { |
| 525 | struct pt_regs regs; |
| 526 | |
| 527 | if (excp == NULL) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 528 | xmon_save_regs(®s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | excp = ®s; |
| 530 | } |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | return xmon_core(excp, 0); |
| 533 | } |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 534 | EXPORT_SYMBOL(xmon); |
| 535 | |
Paul Mackerras | f583ffc | 2006-10-10 11:47:07 +1000 | [diff] [blame] | 536 | irqreturn_t xmon_irq(int irq, void *d) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 537 | { |
| 538 | unsigned long flags; |
| 539 | local_irq_save(flags); |
| 540 | printf("Keyboard interrupt\n"); |
Paul Mackerras | f583ffc | 2006-10-10 11:47:07 +1000 | [diff] [blame] | 541 | xmon(get_irq_regs()); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 542 | local_irq_restore(flags); |
| 543 | return IRQ_HANDLED; |
| 544 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 546 | static int xmon_bpt(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
| 548 | struct bpt *bp; |
| 549 | unsigned long offset; |
| 550 | |
| 551 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) |
| 552 | return 0; |
| 553 | |
| 554 | /* Are we at the trap at bp->instr[1] for some bp? */ |
| 555 | bp = in_breakpoint_table(regs->nip, &offset); |
| 556 | if (bp != NULL && offset == 4) { |
| 557 | regs->nip = bp->address + 4; |
| 558 | atomic_dec(&bp->ref_count); |
| 559 | return 1; |
| 560 | } |
| 561 | |
| 562 | /* Are we at a breakpoint? */ |
| 563 | bp = at_breakpoint(regs->nip); |
| 564 | if (!bp) |
| 565 | return 0; |
| 566 | |
| 567 | xmon_core(regs, 0); |
| 568 | |
| 569 | return 1; |
| 570 | } |
| 571 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 572 | static int xmon_sstep(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | { |
| 574 | if (user_mode(regs)) |
| 575 | return 0; |
| 576 | xmon_core(regs, 0); |
| 577 | return 1; |
| 578 | } |
| 579 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 580 | static int xmon_dabr_match(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | { |
| 582 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) |
| 583 | return 0; |
Anton Blanchard | fd9648d | 2005-09-10 16:01:11 +1000 | [diff] [blame] | 584 | if (dabr.enabled == 0) |
| 585 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | xmon_core(regs, 0); |
| 587 | return 1; |
| 588 | } |
| 589 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 590 | static int xmon_iabr_match(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
| 592 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) |
| 593 | return 0; |
| 594 | if (iabr == 0) |
| 595 | return 0; |
| 596 | xmon_core(regs, 0); |
| 597 | return 1; |
| 598 | } |
| 599 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 600 | static int xmon_ipi(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | { |
| 602 | #ifdef CONFIG_SMP |
| 603 | if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon)) |
| 604 | xmon_core(regs, 1); |
| 605 | #endif |
| 606 | return 0; |
| 607 | } |
| 608 | |
Arnd Bergmann | b0da985 | 2006-01-11 00:00:05 +0000 | [diff] [blame] | 609 | static int xmon_fault_handler(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | { |
| 611 | struct bpt *bp; |
| 612 | unsigned long offset; |
| 613 | |
| 614 | if (in_xmon && catch_memory_errors) |
| 615 | handle_fault(regs); /* doesn't return */ |
| 616 | |
| 617 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { |
| 618 | bp = in_breakpoint_table(regs->nip, &offset); |
| 619 | if (bp != NULL) { |
| 620 | regs->nip = bp->address + offset; |
| 621 | atomic_dec(&bp->ref_count); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | return 0; |
| 626 | } |
| 627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | static struct bpt *at_breakpoint(unsigned long pc) |
| 629 | { |
| 630 | int i; |
| 631 | struct bpt *bp; |
| 632 | |
| 633 | bp = bpts; |
| 634 | for (i = 0; i < NBPTS; ++i, ++bp) |
| 635 | if (bp->enabled && pc == bp->address) |
| 636 | return bp; |
| 637 | return NULL; |
| 638 | } |
| 639 | |
| 640 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) |
| 641 | { |
| 642 | unsigned long off; |
| 643 | |
| 644 | off = nip - (unsigned long) bpts; |
| 645 | if (off >= sizeof(bpts)) |
| 646 | return NULL; |
| 647 | off %= sizeof(struct bpt); |
| 648 | if (off != offsetof(struct bpt, instr[0]) |
| 649 | && off != offsetof(struct bpt, instr[1])) |
| 650 | return NULL; |
| 651 | *offp = off - offsetof(struct bpt, instr[0]); |
| 652 | return (struct bpt *) (nip - off); |
| 653 | } |
| 654 | |
| 655 | static struct bpt *new_breakpoint(unsigned long a) |
| 656 | { |
| 657 | struct bpt *bp; |
| 658 | |
| 659 | a &= ~3UL; |
| 660 | bp = at_breakpoint(a); |
| 661 | if (bp) |
| 662 | return bp; |
| 663 | |
| 664 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { |
| 665 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { |
| 666 | bp->address = a; |
| 667 | bp->instr[1] = bpinstr; |
| 668 | store_inst(&bp->instr[1]); |
| 669 | return bp; |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | printf("Sorry, no free breakpoints. Please clear one first.\n"); |
| 674 | return NULL; |
| 675 | } |
| 676 | |
| 677 | static void insert_bpts(void) |
| 678 | { |
| 679 | int i; |
| 680 | struct bpt *bp; |
| 681 | |
| 682 | bp = bpts; |
| 683 | for (i = 0; i < NBPTS; ++i, ++bp) { |
| 684 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) |
| 685 | continue; |
| 686 | if (mread(bp->address, &bp->instr[0], 4) != 4) { |
| 687 | printf("Couldn't read instruction at %lx, " |
| 688 | "disabling breakpoint there\n", bp->address); |
| 689 | bp->enabled = 0; |
| 690 | continue; |
| 691 | } |
| 692 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { |
| 693 | printf("Breakpoint at %lx is on an mtmsrd or rfid " |
| 694 | "instruction, disabling it\n", bp->address); |
| 695 | bp->enabled = 0; |
| 696 | continue; |
| 697 | } |
| 698 | store_inst(&bp->instr[0]); |
| 699 | if (bp->enabled & BP_IABR) |
| 700 | continue; |
| 701 | if (mwrite(bp->address, &bpinstr, 4) != 4) { |
| 702 | printf("Couldn't write instruction at %lx, " |
| 703 | "disabling breakpoint there\n", bp->address); |
| 704 | bp->enabled &= ~BP_TRAP; |
| 705 | continue; |
| 706 | } |
| 707 | store_inst((void *)bp->address); |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | static void insert_cpu_bpts(void) |
| 712 | { |
| 713 | if (dabr.enabled) |
Anton Blanchard | fd9648d | 2005-09-10 16:01:11 +1000 | [diff] [blame] | 714 | set_dabr(dabr.address | (dabr.enabled & 7)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 716 | mtspr(SPRN_IABR, iabr->address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
| 718 | } |
| 719 | |
| 720 | static void remove_bpts(void) |
| 721 | { |
| 722 | int i; |
| 723 | struct bpt *bp; |
| 724 | unsigned instr; |
| 725 | |
| 726 | bp = bpts; |
| 727 | for (i = 0; i < NBPTS; ++i, ++bp) { |
| 728 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) |
| 729 | continue; |
| 730 | if (mread(bp->address, &instr, 4) == 4 |
| 731 | && instr == bpinstr |
| 732 | && mwrite(bp->address, &bp->instr, 4) != 4) |
| 733 | printf("Couldn't remove breakpoint at %lx\n", |
| 734 | bp->address); |
| 735 | else |
| 736 | store_inst((void *)bp->address); |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | static void remove_cpu_bpts(void) |
| 741 | { |
Anton Blanchard | fd9648d | 2005-09-10 16:01:11 +1000 | [diff] [blame] | 742 | set_dabr(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if (cpu_has_feature(CPU_FTR_IABR)) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 744 | mtspr(SPRN_IABR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | /* Command interpreting routine */ |
| 748 | static char *last_cmd; |
| 749 | |
| 750 | static int |
| 751 | cmds(struct pt_regs *excp) |
| 752 | { |
| 753 | int cmd = 0; |
| 754 | |
| 755 | last_cmd = NULL; |
| 756 | xmon_regs = excp; |
Olaf Hering | 26c8af5 | 2006-09-08 16:29:21 +0200 | [diff] [blame] | 757 | |
| 758 | if (!xmon_no_auto_backtrace) { |
| 759 | xmon_no_auto_backtrace = 1; |
| 760 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); |
| 761 | } |
| 762 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | for(;;) { |
| 764 | #ifdef CONFIG_SMP |
| 765 | printf("%x:", smp_processor_id()); |
| 766 | #endif /* CONFIG_SMP */ |
| 767 | printf("mon> "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | flush_input(); |
| 769 | termch = 0; |
| 770 | cmd = skipbl(); |
| 771 | if( cmd == '\n' ) { |
| 772 | if (last_cmd == NULL) |
| 773 | continue; |
| 774 | take_input(last_cmd); |
| 775 | last_cmd = NULL; |
| 776 | cmd = inchar(); |
| 777 | } |
| 778 | switch (cmd) { |
| 779 | case 'm': |
| 780 | cmd = inchar(); |
| 781 | switch (cmd) { |
| 782 | case 'm': |
| 783 | case 's': |
| 784 | case 'd': |
| 785 | memops(cmd); |
| 786 | break; |
| 787 | case 'l': |
| 788 | memlocate(); |
| 789 | break; |
| 790 | case 'z': |
| 791 | memzcan(); |
| 792 | break; |
| 793 | case 'i': |
| 794 | show_mem(); |
| 795 | break; |
| 796 | default: |
| 797 | termch = cmd; |
| 798 | memex(); |
| 799 | } |
| 800 | break; |
| 801 | case 'd': |
| 802 | dump(); |
| 803 | break; |
| 804 | case 'l': |
| 805 | symbol_lookup(); |
| 806 | break; |
| 807 | case 'r': |
| 808 | prregs(excp); /* print regs */ |
| 809 | break; |
| 810 | case 'e': |
| 811 | excprint(excp); |
| 812 | break; |
| 813 | case 'S': |
| 814 | super_regs(); |
| 815 | break; |
| 816 | case 't': |
| 817 | backtrace(excp); |
| 818 | break; |
| 819 | case 'f': |
| 820 | cacheflush(); |
| 821 | break; |
| 822 | case 's': |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 823 | if (do_spu_cmd() == 0) |
| 824 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | if (do_step(excp)) |
| 826 | return cmd; |
| 827 | break; |
| 828 | case 'x': |
| 829 | case 'X': |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 830 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | case EOF: |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 832 | printf(" <no input ...>\n"); |
| 833 | mdelay(2000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | return cmd; |
| 835 | case '?': |
| 836 | printf(help_string); |
| 837 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | case 'b': |
| 839 | bpt_cmds(); |
| 840 | break; |
| 841 | case 'C': |
| 842 | csum(); |
| 843 | break; |
| 844 | case 'c': |
| 845 | if (cpu_cmd()) |
| 846 | return 0; |
| 847 | break; |
| 848 | case 'z': |
| 849 | bootcmds(); |
| 850 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 851 | case 'p': |
| 852 | proccall(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 854 | #ifdef CONFIG_PPC_STD_MMU |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | case 'u': |
| 856 | dump_segments(); |
| 857 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 858 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | default: |
| 860 | printf("Unrecognized command: "); |
| 861 | do { |
| 862 | if (' ' < cmd && cmd <= '~') |
| 863 | putchar(cmd); |
| 864 | else |
| 865 | printf("\\x%x", cmd); |
| 866 | cmd = inchar(); |
| 867 | } while (cmd != '\n'); |
| 868 | printf(" (type ? for help)\n"); |
| 869 | break; |
| 870 | } |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | /* |
| 875 | * Step a single instruction. |
| 876 | * Some instructions we emulate, others we execute with MSR_SE set. |
| 877 | */ |
| 878 | static int do_step(struct pt_regs *regs) |
| 879 | { |
| 880 | unsigned int instr; |
| 881 | int stepped; |
| 882 | |
| 883 | /* check we are in 64-bit kernel mode, translation enabled */ |
| 884 | if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) { |
| 885 | if (mread(regs->nip, &instr, 4) == 4) { |
| 886 | stepped = emulate_step(regs, instr); |
| 887 | if (stepped < 0) { |
| 888 | printf("Couldn't single-step %s instruction\n", |
| 889 | (IS_RFID(instr)? "rfid": "mtmsrd")); |
| 890 | return 0; |
| 891 | } |
| 892 | if (stepped > 0) { |
| 893 | regs->trap = 0xd00 | (regs->trap & 1); |
| 894 | printf("stepped to "); |
| 895 | xmon_print_symbol(regs->nip, " ", "\n"); |
| 896 | ppc_inst_dump(regs->nip, 1, 0); |
| 897 | return 0; |
| 898 | } |
| 899 | } |
| 900 | } |
| 901 | regs->msr |= MSR_SE; |
| 902 | return 1; |
| 903 | } |
| 904 | |
| 905 | static void bootcmds(void) |
| 906 | { |
| 907 | int cmd; |
| 908 | |
| 909 | cmd = inchar(); |
| 910 | if (cmd == 'r') |
| 911 | ppc_md.restart(NULL); |
| 912 | else if (cmd == 'h') |
| 913 | ppc_md.halt(); |
| 914 | else if (cmd == 'p') |
| 915 | ppc_md.power_off(); |
| 916 | } |
| 917 | |
| 918 | static int cpu_cmd(void) |
| 919 | { |
| 920 | #ifdef CONFIG_SMP |
| 921 | unsigned long cpu; |
| 922 | int timeout; |
| 923 | int count; |
| 924 | |
| 925 | if (!scanhex(&cpu)) { |
| 926 | /* print cpus waiting or in xmon */ |
| 927 | printf("cpus stopped:"); |
| 928 | count = 0; |
| 929 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { |
| 930 | if (cpu_isset(cpu, cpus_in_xmon)) { |
| 931 | if (count == 0) |
| 932 | printf(" %x", cpu); |
| 933 | ++count; |
| 934 | } else { |
| 935 | if (count > 1) |
| 936 | printf("-%x", cpu - 1); |
| 937 | count = 0; |
| 938 | } |
| 939 | } |
| 940 | if (count > 1) |
| 941 | printf("-%x", NR_CPUS - 1); |
| 942 | printf("\n"); |
| 943 | return 0; |
| 944 | } |
| 945 | /* try to switch to cpu specified */ |
| 946 | if (!cpu_isset(cpu, cpus_in_xmon)) { |
| 947 | printf("cpu 0x%x isn't in xmon\n", cpu); |
| 948 | return 0; |
| 949 | } |
| 950 | xmon_taken = 0; |
| 951 | mb(); |
| 952 | xmon_owner = cpu; |
| 953 | timeout = 10000000; |
| 954 | while (!xmon_taken) { |
| 955 | if (--timeout == 0) { |
| 956 | if (test_and_set_bit(0, &xmon_taken)) |
| 957 | break; |
| 958 | /* take control back */ |
| 959 | mb(); |
| 960 | xmon_owner = smp_processor_id(); |
| 961 | printf("cpu %u didn't take control\n", cpu); |
| 962 | return 0; |
| 963 | } |
| 964 | barrier(); |
| 965 | } |
| 966 | return 1; |
| 967 | #else |
| 968 | return 0; |
| 969 | #endif /* CONFIG_SMP */ |
| 970 | } |
| 971 | |
| 972 | static unsigned short fcstab[256] = { |
| 973 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, |
| 974 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, |
| 975 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, |
| 976 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, |
| 977 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, |
| 978 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, |
| 979 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, |
| 980 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, |
| 981 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, |
| 982 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, |
| 983 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, |
| 984 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, |
| 985 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, |
| 986 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, |
| 987 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, |
| 988 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, |
| 989 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, |
| 990 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, |
| 991 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, |
| 992 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, |
| 993 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, |
| 994 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, |
| 995 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, |
| 996 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, |
| 997 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, |
| 998 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, |
| 999 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, |
| 1000 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, |
| 1001 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, |
| 1002 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, |
| 1003 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, |
| 1004 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 |
| 1005 | }; |
| 1006 | |
| 1007 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) |
| 1008 | |
| 1009 | static void |
| 1010 | csum(void) |
| 1011 | { |
| 1012 | unsigned int i; |
| 1013 | unsigned short fcs; |
| 1014 | unsigned char v; |
| 1015 | |
| 1016 | if (!scanhex(&adrs)) |
| 1017 | return; |
| 1018 | if (!scanhex(&ncsum)) |
| 1019 | return; |
| 1020 | fcs = 0xffff; |
| 1021 | for (i = 0; i < ncsum; ++i) { |
| 1022 | if (mread(adrs+i, &v, 1) == 0) { |
| 1023 | printf("csum stopped at %x\n", adrs+i); |
| 1024 | break; |
| 1025 | } |
| 1026 | fcs = FCS(fcs, v); |
| 1027 | } |
| 1028 | printf("%x\n", fcs); |
| 1029 | } |
| 1030 | |
| 1031 | /* |
| 1032 | * Check if this is a suitable place to put a breakpoint. |
| 1033 | */ |
| 1034 | static long check_bp_loc(unsigned long addr) |
| 1035 | { |
| 1036 | unsigned int instr; |
| 1037 | |
| 1038 | addr &= ~3; |
Michael Ellerman | 51fae6de | 2005-12-04 18:39:15 +1100 | [diff] [blame] | 1039 | if (!is_kernel_addr(addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | printf("Breakpoints may only be placed at kernel addresses\n"); |
| 1041 | return 0; |
| 1042 | } |
| 1043 | if (!mread(addr, &instr, sizeof(instr))) { |
| 1044 | printf("Can't read instruction at address %lx\n", addr); |
| 1045 | return 0; |
| 1046 | } |
| 1047 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { |
| 1048 | printf("Breakpoints may not be placed on mtmsrd or rfid " |
| 1049 | "instructions\n"); |
| 1050 | return 0; |
| 1051 | } |
| 1052 | return 1; |
| 1053 | } |
| 1054 | |
| 1055 | static char *breakpoint_help_string = |
| 1056 | "Breakpoint command usage:\n" |
| 1057 | "b show breakpoints\n" |
| 1058 | "b <addr> [cnt] set breakpoint at given instr addr\n" |
| 1059 | "bc clear all breakpoints\n" |
| 1060 | "bc <n/addr> clear breakpoint number n or at addr\n" |
| 1061 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" |
| 1062 | "bd <addr> [cnt] set hardware data breakpoint\n" |
| 1063 | ""; |
| 1064 | |
| 1065 | static void |
| 1066 | bpt_cmds(void) |
| 1067 | { |
| 1068 | int cmd; |
| 1069 | unsigned long a; |
| 1070 | int mode, i; |
| 1071 | struct bpt *bp; |
| 1072 | const char badaddr[] = "Only kernel addresses are permitted " |
| 1073 | "for breakpoints\n"; |
| 1074 | |
| 1075 | cmd = inchar(); |
| 1076 | switch (cmd) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1077 | #ifndef CONFIG_8xx |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | case 'd': /* bd - hardware data breakpoint */ |
| 1079 | mode = 7; |
| 1080 | cmd = inchar(); |
| 1081 | if (cmd == 'r') |
| 1082 | mode = 5; |
| 1083 | else if (cmd == 'w') |
| 1084 | mode = 6; |
| 1085 | else |
| 1086 | termch = cmd; |
| 1087 | dabr.address = 0; |
| 1088 | dabr.enabled = 0; |
| 1089 | if (scanhex(&dabr.address)) { |
Michael Ellerman | 51fae6de | 2005-12-04 18:39:15 +1100 | [diff] [blame] | 1090 | if (!is_kernel_addr(dabr.address)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | printf(badaddr); |
| 1092 | break; |
| 1093 | } |
| 1094 | dabr.address &= ~7; |
| 1095 | dabr.enabled = mode | BP_DABR; |
| 1096 | } |
| 1097 | break; |
| 1098 | |
| 1099 | case 'i': /* bi - hardware instr breakpoint */ |
| 1100 | if (!cpu_has_feature(CPU_FTR_IABR)) { |
| 1101 | printf("Hardware instruction breakpoint " |
| 1102 | "not supported on this cpu\n"); |
| 1103 | break; |
| 1104 | } |
| 1105 | if (iabr) { |
| 1106 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); |
| 1107 | iabr = NULL; |
| 1108 | } |
| 1109 | if (!scanhex(&a)) |
| 1110 | break; |
| 1111 | if (!check_bp_loc(a)) |
| 1112 | break; |
| 1113 | bp = new_breakpoint(a); |
| 1114 | if (bp != NULL) { |
| 1115 | bp->enabled |= BP_IABR | BP_IABR_TE; |
| 1116 | iabr = bp; |
| 1117 | } |
| 1118 | break; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1119 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
| 1121 | case 'c': |
| 1122 | if (!scanhex(&a)) { |
| 1123 | /* clear all breakpoints */ |
| 1124 | for (i = 0; i < NBPTS; ++i) |
| 1125 | bpts[i].enabled = 0; |
| 1126 | iabr = NULL; |
| 1127 | dabr.enabled = 0; |
| 1128 | printf("All breakpoints cleared\n"); |
| 1129 | break; |
| 1130 | } |
| 1131 | |
| 1132 | if (a <= NBPTS && a >= 1) { |
| 1133 | /* assume a breakpoint number */ |
| 1134 | bp = &bpts[a-1]; /* bp nums are 1 based */ |
| 1135 | } else { |
| 1136 | /* assume a breakpoint address */ |
| 1137 | bp = at_breakpoint(a); |
| 1138 | if (bp == 0) { |
| 1139 | printf("No breakpoint at %x\n", a); |
| 1140 | break; |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | printf("Cleared breakpoint %x (", BP_NUM(bp)); |
| 1145 | xmon_print_symbol(bp->address, " ", ")\n"); |
| 1146 | bp->enabled = 0; |
| 1147 | break; |
| 1148 | |
| 1149 | default: |
| 1150 | termch = cmd; |
| 1151 | cmd = skipbl(); |
| 1152 | if (cmd == '?') { |
| 1153 | printf(breakpoint_help_string); |
| 1154 | break; |
| 1155 | } |
| 1156 | termch = cmd; |
| 1157 | if (!scanhex(&a)) { |
| 1158 | /* print all breakpoints */ |
| 1159 | printf(" type address\n"); |
| 1160 | if (dabr.enabled) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1161 | printf(" data "REG" [", dabr.address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | if (dabr.enabled & 1) |
| 1163 | printf("r"); |
| 1164 | if (dabr.enabled & 2) |
| 1165 | printf("w"); |
| 1166 | printf("]\n"); |
| 1167 | } |
| 1168 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { |
| 1169 | if (!bp->enabled) |
| 1170 | continue; |
| 1171 | printf("%2x %s ", BP_NUM(bp), |
| 1172 | (bp->enabled & BP_IABR)? "inst": "trap"); |
| 1173 | xmon_print_symbol(bp->address, " ", "\n"); |
| 1174 | } |
| 1175 | break; |
| 1176 | } |
| 1177 | |
| 1178 | if (!check_bp_loc(a)) |
| 1179 | break; |
| 1180 | bp = new_breakpoint(a); |
| 1181 | if (bp != NULL) |
| 1182 | bp->enabled |= BP_TRAP; |
| 1183 | break; |
| 1184 | } |
| 1185 | } |
| 1186 | |
| 1187 | /* Very cheap human name for vector lookup. */ |
| 1188 | static |
| 1189 | const char *getvecname(unsigned long vec) |
| 1190 | { |
| 1191 | char *ret; |
| 1192 | |
| 1193 | switch (vec) { |
| 1194 | case 0x100: ret = "(System Reset)"; break; |
| 1195 | case 0x200: ret = "(Machine Check)"; break; |
| 1196 | case 0x300: ret = "(Data Access)"; break; |
| 1197 | case 0x380: ret = "(Data SLB Access)"; break; |
| 1198 | case 0x400: ret = "(Instruction Access)"; break; |
| 1199 | case 0x480: ret = "(Instruction SLB Access)"; break; |
| 1200 | case 0x500: ret = "(Hardware Interrupt)"; break; |
| 1201 | case 0x600: ret = "(Alignment)"; break; |
| 1202 | case 0x700: ret = "(Program Check)"; break; |
| 1203 | case 0x800: ret = "(FPU Unavailable)"; break; |
| 1204 | case 0x900: ret = "(Decrementer)"; break; |
| 1205 | case 0xc00: ret = "(System Call)"; break; |
| 1206 | case 0xd00: ret = "(Single Step)"; break; |
| 1207 | case 0xf00: ret = "(Performance Monitor)"; break; |
| 1208 | case 0xf20: ret = "(Altivec Unavailable)"; break; |
| 1209 | case 0x1300: ret = "(Instruction Breakpoint)"; break; |
| 1210 | default: ret = ""; |
| 1211 | } |
| 1212 | return ret; |
| 1213 | } |
| 1214 | |
| 1215 | static void get_function_bounds(unsigned long pc, unsigned long *startp, |
| 1216 | unsigned long *endp) |
| 1217 | { |
| 1218 | unsigned long size, offset; |
| 1219 | const char *name; |
| 1220 | char *modname; |
| 1221 | |
| 1222 | *startp = *endp = 0; |
| 1223 | if (pc == 0) |
| 1224 | return; |
| 1225 | if (setjmp(bus_error_jmp) == 0) { |
| 1226 | catch_memory_errors = 1; |
| 1227 | sync(); |
| 1228 | name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr); |
| 1229 | if (name != NULL) { |
| 1230 | *startp = pc - offset; |
| 1231 | *endp = pc - offset + size; |
| 1232 | } |
| 1233 | sync(); |
| 1234 | } |
| 1235 | catch_memory_errors = 0; |
| 1236 | } |
| 1237 | |
| 1238 | static int xmon_depth_to_print = 64; |
| 1239 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1240 | #ifdef CONFIG_PPC64 |
| 1241 | #define LRSAVE_OFFSET 0x10 |
| 1242 | #define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */ |
| 1243 | #define MARKER_OFFSET 0x60 |
| 1244 | #define REGS_OFFSET 0x70 |
| 1245 | #else |
| 1246 | #define LRSAVE_OFFSET 4 |
| 1247 | #define REG_FRAME_MARKER 0x72656773 |
| 1248 | #define MARKER_OFFSET 8 |
| 1249 | #define REGS_OFFSET 16 |
| 1250 | #endif |
| 1251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
| 1253 | unsigned long pc) |
| 1254 | { |
| 1255 | unsigned long ip; |
| 1256 | unsigned long newsp; |
| 1257 | unsigned long marker; |
| 1258 | int count = 0; |
| 1259 | struct pt_regs regs; |
| 1260 | |
| 1261 | do { |
| 1262 | if (sp < PAGE_OFFSET) { |
| 1263 | if (sp != 0) |
| 1264 | printf("SP (%lx) is in userspace\n", sp); |
| 1265 | break; |
| 1266 | } |
| 1267 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1268 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
| 1270 | printf("Couldn't read stack frame at %lx\n", sp); |
| 1271 | break; |
| 1272 | } |
| 1273 | |
| 1274 | /* |
| 1275 | * For the first stack frame, try to work out if |
| 1276 | * LR and/or the saved LR value in the bottommost |
| 1277 | * stack frame are valid. |
| 1278 | */ |
| 1279 | if ((pc | lr) != 0) { |
| 1280 | unsigned long fnstart, fnend; |
| 1281 | unsigned long nextip; |
| 1282 | int printip = 1; |
| 1283 | |
| 1284 | get_function_bounds(pc, &fnstart, &fnend); |
| 1285 | nextip = 0; |
| 1286 | if (newsp > sp) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1287 | mread(newsp + LRSAVE_OFFSET, &nextip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | sizeof(unsigned long)); |
| 1289 | if (lr == ip) { |
| 1290 | if (lr < PAGE_OFFSET |
| 1291 | || (fnstart <= lr && lr < fnend)) |
| 1292 | printip = 0; |
| 1293 | } else if (lr == nextip) { |
| 1294 | printip = 0; |
| 1295 | } else if (lr >= PAGE_OFFSET |
| 1296 | && !(fnstart <= lr && lr < fnend)) { |
| 1297 | printf("[link register ] "); |
| 1298 | xmon_print_symbol(lr, " ", "\n"); |
| 1299 | } |
| 1300 | if (printip) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1301 | printf("["REG"] ", sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
| 1303 | } |
| 1304 | pc = lr = 0; |
| 1305 | |
| 1306 | } else { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1307 | printf("["REG"] ", sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | xmon_print_symbol(ip, " ", "\n"); |
| 1309 | } |
| 1310 | |
| 1311 | /* Look for "regshere" marker to see if this is |
| 1312 | an exception frame. */ |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1313 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
| 1314 | && marker == REG_FRAME_MARKER) { |
| 1315 | if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | != sizeof(regs)) { |
| 1317 | printf("Couldn't read registers at %lx\n", |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1318 | sp + REGS_OFFSET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | break; |
| 1320 | } |
| 1321 | printf("--- Exception: %lx %s at ", regs.trap, |
| 1322 | getvecname(TRAP(®s))); |
| 1323 | pc = regs.nip; |
| 1324 | lr = regs.link; |
| 1325 | xmon_print_symbol(pc, " ", "\n"); |
| 1326 | } |
| 1327 | |
| 1328 | if (newsp == 0) |
| 1329 | break; |
| 1330 | |
| 1331 | sp = newsp; |
| 1332 | } while (count++ < xmon_depth_to_print); |
| 1333 | } |
| 1334 | |
| 1335 | static void backtrace(struct pt_regs *excp) |
| 1336 | { |
| 1337 | unsigned long sp; |
| 1338 | |
| 1339 | if (scanhex(&sp)) |
| 1340 | xmon_show_stack(sp, 0, 0); |
| 1341 | else |
| 1342 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); |
| 1343 | scannl(); |
| 1344 | } |
| 1345 | |
| 1346 | static void print_bug_trap(struct pt_regs *regs) |
| 1347 | { |
| 1348 | struct bug_entry *bug; |
| 1349 | unsigned long addr; |
| 1350 | |
| 1351 | if (regs->msr & MSR_PR) |
| 1352 | return; /* not in kernel */ |
| 1353 | addr = regs->nip; /* address of trap instruction */ |
| 1354 | if (addr < PAGE_OFFSET) |
| 1355 | return; |
| 1356 | bug = find_bug(regs->nip); |
| 1357 | if (bug == NULL) |
| 1358 | return; |
| 1359 | if (bug->line & BUG_WARNING_TRAP) |
| 1360 | return; |
| 1361 | |
| 1362 | printf("kernel BUG in %s at %s:%d!\n", |
| 1363 | bug->function, bug->file, (unsigned int)bug->line); |
| 1364 | } |
| 1365 | |
| 1366 | void excprint(struct pt_regs *fp) |
| 1367 | { |
| 1368 | unsigned long trap; |
| 1369 | |
| 1370 | #ifdef CONFIG_SMP |
| 1371 | printf("cpu 0x%x: ", smp_processor_id()); |
| 1372 | #endif /* CONFIG_SMP */ |
| 1373 | |
| 1374 | trap = TRAP(fp); |
| 1375 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); |
| 1376 | printf(" pc: "); |
| 1377 | xmon_print_symbol(fp->nip, ": ", "\n"); |
| 1378 | |
| 1379 | printf(" lr: ", fp->link); |
| 1380 | xmon_print_symbol(fp->link, ": ", "\n"); |
| 1381 | |
| 1382 | printf(" sp: %lx\n", fp->gpr[1]); |
| 1383 | printf(" msr: %lx\n", fp->msr); |
| 1384 | |
| 1385 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { |
| 1386 | printf(" dar: %lx\n", fp->dar); |
| 1387 | if (trap != 0x380) |
| 1388 | printf(" dsisr: %lx\n", fp->dsisr); |
| 1389 | } |
| 1390 | |
| 1391 | printf(" current = 0x%lx\n", current); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1392 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | printf(" paca = 0x%lx\n", get_paca()); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1394 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | if (current) { |
| 1396 | printf(" pid = %ld, comm = %s\n", |
| 1397 | current->pid, current->comm); |
| 1398 | } |
| 1399 | |
| 1400 | if (trap == 0x700) |
| 1401 | print_bug_trap(fp); |
| 1402 | } |
| 1403 | |
| 1404 | void prregs(struct pt_regs *fp) |
| 1405 | { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1406 | int n, trap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | unsigned long base; |
| 1408 | struct pt_regs regs; |
| 1409 | |
| 1410 | if (scanhex(&base)) { |
| 1411 | if (setjmp(bus_error_jmp) == 0) { |
| 1412 | catch_memory_errors = 1; |
| 1413 | sync(); |
| 1414 | regs = *(struct pt_regs *)base; |
| 1415 | sync(); |
| 1416 | __delay(200); |
| 1417 | } else { |
| 1418 | catch_memory_errors = 0; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1419 | printf("*** Error reading registers from "REG"\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | base); |
| 1421 | return; |
| 1422 | } |
| 1423 | catch_memory_errors = 0; |
| 1424 | fp = ®s; |
| 1425 | } |
| 1426 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1427 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | if (FULL_REGS(fp)) { |
| 1429 | for (n = 0; n < 16; ++n) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1430 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
| 1432 | } else { |
| 1433 | for (n = 0; n < 7; ++n) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1434 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
| 1436 | } |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1437 | #else |
| 1438 | for (n = 0; n < 32; ++n) { |
| 1439 | printf("R%.2d = %.8x%s", n, fp->gpr[n], |
| 1440 | (n & 3) == 3? "\n": " "); |
| 1441 | if (n == 12 && !FULL_REGS(fp)) { |
| 1442 | printf("\n"); |
| 1443 | break; |
| 1444 | } |
| 1445 | } |
| 1446 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | printf("pc = "); |
| 1448 | xmon_print_symbol(fp->nip, " ", "\n"); |
| 1449 | printf("lr = "); |
| 1450 | xmon_print_symbol(fp->link, " ", "\n"); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1451 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
| 1452 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | fp->ctr, fp->xer, fp->trap); |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1454 | trap = TRAP(fp); |
| 1455 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) |
| 1456 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | } |
| 1458 | |
| 1459 | void cacheflush(void) |
| 1460 | { |
| 1461 | int cmd; |
| 1462 | unsigned long nflush; |
| 1463 | |
| 1464 | cmd = inchar(); |
| 1465 | if (cmd != 'i') |
| 1466 | termch = cmd; |
| 1467 | scanhex((void *)&adrs); |
| 1468 | if (termch != '\n') |
| 1469 | termch = 0; |
| 1470 | nflush = 1; |
| 1471 | scanhex(&nflush); |
| 1472 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; |
| 1473 | if (setjmp(bus_error_jmp) == 0) { |
| 1474 | catch_memory_errors = 1; |
| 1475 | sync(); |
| 1476 | |
| 1477 | if (cmd != 'i') { |
| 1478 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) |
| 1479 | cflush((void *) adrs); |
| 1480 | } else { |
| 1481 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) |
| 1482 | cinval((void *) adrs); |
| 1483 | } |
| 1484 | sync(); |
| 1485 | /* wait a little while to see if we get a machine check */ |
| 1486 | __delay(200); |
| 1487 | } |
| 1488 | catch_memory_errors = 0; |
| 1489 | } |
| 1490 | |
| 1491 | unsigned long |
| 1492 | read_spr(int n) |
| 1493 | { |
| 1494 | unsigned int instrs[2]; |
| 1495 | unsigned long (*code)(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | unsigned long ret = -1UL; |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1497 | #ifdef CONFIG_PPC64 |
| 1498 | unsigned long opd[3]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | opd[0] = (unsigned long)instrs; |
| 1501 | opd[1] = 0; |
| 1502 | opd[2] = 0; |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1503 | code = (unsigned long (*)(void)) opd; |
| 1504 | #else |
| 1505 | code = (unsigned long (*)(void)) instrs; |
| 1506 | #endif |
| 1507 | |
| 1508 | /* mfspr r3,n; blr */ |
| 1509 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| 1510 | instrs[1] = 0x4e800020; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | store_inst(instrs); |
| 1512 | store_inst(instrs+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | |
| 1514 | if (setjmp(bus_error_jmp) == 0) { |
| 1515 | catch_memory_errors = 1; |
| 1516 | sync(); |
| 1517 | |
| 1518 | ret = code(); |
| 1519 | |
| 1520 | sync(); |
| 1521 | /* wait a little while to see if we get a machine check */ |
| 1522 | __delay(200); |
| 1523 | n = size; |
| 1524 | } |
| 1525 | |
| 1526 | return ret; |
| 1527 | } |
| 1528 | |
| 1529 | void |
| 1530 | write_spr(int n, unsigned long val) |
| 1531 | { |
| 1532 | unsigned int instrs[2]; |
| 1533 | unsigned long (*code)(unsigned long); |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1534 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | unsigned long opd[3]; |
| 1536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | opd[0] = (unsigned long)instrs; |
| 1538 | opd[1] = 0; |
| 1539 | opd[2] = 0; |
Paul Mackerras | 548cceb | 2005-11-11 22:36:34 +1100 | [diff] [blame] | 1540 | code = (unsigned long (*)(unsigned long)) opd; |
| 1541 | #else |
| 1542 | code = (unsigned long (*)(unsigned long)) instrs; |
| 1543 | #endif |
| 1544 | |
| 1545 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); |
| 1546 | instrs[1] = 0x4e800020; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | store_inst(instrs); |
| 1548 | store_inst(instrs+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | |
| 1550 | if (setjmp(bus_error_jmp) == 0) { |
| 1551 | catch_memory_errors = 1; |
| 1552 | sync(); |
| 1553 | |
| 1554 | code(val); |
| 1555 | |
| 1556 | sync(); |
| 1557 | /* wait a little while to see if we get a machine check */ |
| 1558 | __delay(200); |
| 1559 | n = size; |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | static unsigned long regno; |
| 1564 | extern char exc_prolog; |
| 1565 | extern char dec_exc; |
| 1566 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1567 | void super_regs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | { |
| 1569 | int cmd; |
| 1570 | unsigned long val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | |
| 1572 | cmd = skipbl(); |
| 1573 | if (cmd == '\n') { |
| 1574 | unsigned long sp, toc; |
| 1575 | asm("mr %0,1" : "=r" (sp) :); |
| 1576 | asm("mr %0,2" : "=r" (toc) :); |
| 1577 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1578 | printf("msr = "REG" sprg0= "REG"\n", |
| 1579 | mfmsr(), mfspr(SPRN_SPRG0)); |
| 1580 | printf("pvr = "REG" sprg1= "REG"\n", |
| 1581 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
| 1582 | printf("dec = "REG" sprg2= "REG"\n", |
| 1583 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); |
| 1584 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); |
| 1585 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | #ifdef CONFIG_PPC_ISERIES |
Stephen Rothwell | 1d13581 | 2006-11-13 14:50:28 +1100 | [diff] [blame^] | 1587 | if (firmware_has_feature(FW_FEATURE_ISERIES)) { |
| 1588 | struct paca_struct *ptrPaca; |
| 1589 | struct lppaca *ptrLpPaca; |
| 1590 | struct ItLpRegSave *ptrLpRegSave; |
| 1591 | |
| 1592 | /* Dump out relevant Paca data areas. */ |
| 1593 | printf("Paca: \n"); |
| 1594 | ptrPaca = get_paca(); |
| 1595 | |
| 1596 | printf(" Local Processor Control Area (LpPaca): \n"); |
| 1597 | ptrLpPaca = ptrPaca->lppaca_ptr; |
| 1598 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", |
| 1599 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); |
| 1600 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", |
| 1601 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); |
| 1602 | printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5); |
| 1603 | |
| 1604 | printf(" Local Processor Register Save Area (LpRegSave): \n"); |
| 1605 | ptrLpRegSave = ptrPaca->reg_save_ptr; |
| 1606 | printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", |
| 1607 | ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); |
| 1608 | printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", |
| 1609 | ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); |
| 1610 | printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", |
| 1611 | ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); |
| 1612 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | #endif |
| 1614 | |
| 1615 | return; |
| 1616 | } |
| 1617 | |
| 1618 | scanhex(®no); |
| 1619 | switch (cmd) { |
| 1620 | case 'w': |
| 1621 | val = read_spr(regno); |
| 1622 | scanhex(&val); |
| 1623 | write_spr(regno, val); |
| 1624 | /* fall through */ |
| 1625 | case 'r': |
| 1626 | printf("spr %lx = %lx\n", regno, read_spr(regno)); |
| 1627 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | } |
| 1629 | scannl(); |
| 1630 | } |
| 1631 | |
| 1632 | /* |
| 1633 | * Stuff for reading and writing memory safely |
| 1634 | */ |
| 1635 | int |
| 1636 | mread(unsigned long adrs, void *buf, int size) |
| 1637 | { |
| 1638 | volatile int n; |
| 1639 | char *p, *q; |
| 1640 | |
| 1641 | n = 0; |
| 1642 | if (setjmp(bus_error_jmp) == 0) { |
| 1643 | catch_memory_errors = 1; |
| 1644 | sync(); |
| 1645 | p = (char *)adrs; |
| 1646 | q = (char *)buf; |
| 1647 | switch (size) { |
| 1648 | case 2: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1649 | *(u16 *)q = *(u16 *)p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | break; |
| 1651 | case 4: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1652 | *(u32 *)q = *(u32 *)p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | break; |
| 1654 | case 8: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1655 | *(u64 *)q = *(u64 *)p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | break; |
| 1657 | default: |
| 1658 | for( ; n < size; ++n) { |
| 1659 | *q++ = *p++; |
| 1660 | sync(); |
| 1661 | } |
| 1662 | } |
| 1663 | sync(); |
| 1664 | /* wait a little while to see if we get a machine check */ |
| 1665 | __delay(200); |
| 1666 | n = size; |
| 1667 | } |
| 1668 | catch_memory_errors = 0; |
| 1669 | return n; |
| 1670 | } |
| 1671 | |
| 1672 | int |
| 1673 | mwrite(unsigned long adrs, void *buf, int size) |
| 1674 | { |
| 1675 | volatile int n; |
| 1676 | char *p, *q; |
| 1677 | |
| 1678 | n = 0; |
| 1679 | if (setjmp(bus_error_jmp) == 0) { |
| 1680 | catch_memory_errors = 1; |
| 1681 | sync(); |
| 1682 | p = (char *) adrs; |
| 1683 | q = (char *) buf; |
| 1684 | switch (size) { |
| 1685 | case 2: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1686 | *(u16 *)p = *(u16 *)q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | break; |
| 1688 | case 4: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1689 | *(u32 *)p = *(u32 *)q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | break; |
| 1691 | case 8: |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1692 | *(u64 *)p = *(u64 *)q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | break; |
| 1694 | default: |
| 1695 | for ( ; n < size; ++n) { |
| 1696 | *p++ = *q++; |
| 1697 | sync(); |
| 1698 | } |
| 1699 | } |
| 1700 | sync(); |
| 1701 | /* wait a little while to see if we get a machine check */ |
| 1702 | __delay(200); |
| 1703 | n = size; |
| 1704 | } else { |
| 1705 | printf("*** Error writing address %x\n", adrs + n); |
| 1706 | } |
| 1707 | catch_memory_errors = 0; |
| 1708 | return n; |
| 1709 | } |
| 1710 | |
| 1711 | static int fault_type; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1712 | static int fault_except; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | static char *fault_chars[] = { "--", "**", "##" }; |
| 1714 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1715 | static int handle_fault(struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 1717 | fault_except = TRAP(regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | switch (TRAP(regs)) { |
| 1719 | case 0x200: |
| 1720 | fault_type = 0; |
| 1721 | break; |
| 1722 | case 0x300: |
| 1723 | case 0x380: |
| 1724 | fault_type = 1; |
| 1725 | break; |
| 1726 | default: |
| 1727 | fault_type = 2; |
| 1728 | } |
| 1729 | |
| 1730 | longjmp(bus_error_jmp, 1); |
| 1731 | |
| 1732 | return 0; |
| 1733 | } |
| 1734 | |
| 1735 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) |
| 1736 | |
| 1737 | void |
| 1738 | byterev(unsigned char *val, int size) |
| 1739 | { |
| 1740 | int t; |
| 1741 | |
| 1742 | switch (size) { |
| 1743 | case 2: |
| 1744 | SWAP(val[0], val[1], t); |
| 1745 | break; |
| 1746 | case 4: |
| 1747 | SWAP(val[0], val[3], t); |
| 1748 | SWAP(val[1], val[2], t); |
| 1749 | break; |
| 1750 | case 8: /* is there really any use for this? */ |
| 1751 | SWAP(val[0], val[7], t); |
| 1752 | SWAP(val[1], val[6], t); |
| 1753 | SWAP(val[2], val[5], t); |
| 1754 | SWAP(val[3], val[4], t); |
| 1755 | break; |
| 1756 | } |
| 1757 | } |
| 1758 | |
| 1759 | static int brev; |
| 1760 | static int mnoread; |
| 1761 | |
| 1762 | static char *memex_help_string = |
| 1763 | "Memory examine command usage:\n" |
| 1764 | "m [addr] [flags] examine/change memory\n" |
| 1765 | " addr is optional. will start where left off.\n" |
| 1766 | " flags may include chars from this set:\n" |
| 1767 | " b modify by bytes (default)\n" |
| 1768 | " w modify by words (2 byte)\n" |
| 1769 | " l modify by longs (4 byte)\n" |
| 1770 | " d modify by doubleword (8 byte)\n" |
| 1771 | " r toggle reverse byte order mode\n" |
| 1772 | " n do not read memory (for i/o spaces)\n" |
| 1773 | " . ok to read (default)\n" |
| 1774 | "NOTE: flags are saved as defaults\n" |
| 1775 | ""; |
| 1776 | |
| 1777 | static char *memex_subcmd_help_string = |
| 1778 | "Memory examine subcommands:\n" |
| 1779 | " hexval write this val to current location\n" |
| 1780 | " 'string' write chars from string to this location\n" |
| 1781 | " ' increment address\n" |
| 1782 | " ^ decrement address\n" |
| 1783 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" |
| 1784 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" |
| 1785 | " ` clear no-read flag\n" |
| 1786 | " ; stay at this addr\n" |
| 1787 | " v change to byte mode\n" |
| 1788 | " w change to word (2 byte) mode\n" |
| 1789 | " l change to long (4 byte) mode\n" |
| 1790 | " u change to doubleword (8 byte) mode\n" |
| 1791 | " m addr change current addr\n" |
| 1792 | " n toggle no-read flag\n" |
| 1793 | " r toggle byte reverse flag\n" |
| 1794 | " < count back up count bytes\n" |
| 1795 | " > count skip forward count bytes\n" |
| 1796 | " x exit this mode\n" |
| 1797 | ""; |
| 1798 | |
| 1799 | void |
| 1800 | memex(void) |
| 1801 | { |
| 1802 | int cmd, inc, i, nslash; |
| 1803 | unsigned long n; |
| 1804 | unsigned char val[16]; |
| 1805 | |
| 1806 | scanhex((void *)&adrs); |
| 1807 | cmd = skipbl(); |
| 1808 | if (cmd == '?') { |
| 1809 | printf(memex_help_string); |
| 1810 | return; |
| 1811 | } else { |
| 1812 | termch = cmd; |
| 1813 | } |
| 1814 | last_cmd = "m\n"; |
| 1815 | while ((cmd = skipbl()) != '\n') { |
| 1816 | switch( cmd ){ |
| 1817 | case 'b': size = 1; break; |
| 1818 | case 'w': size = 2; break; |
| 1819 | case 'l': size = 4; break; |
| 1820 | case 'd': size = 8; break; |
| 1821 | case 'r': brev = !brev; break; |
| 1822 | case 'n': mnoread = 1; break; |
| 1823 | case '.': mnoread = 0; break; |
| 1824 | } |
| 1825 | } |
| 1826 | if( size <= 0 ) |
| 1827 | size = 1; |
| 1828 | else if( size > 8 ) |
| 1829 | size = 8; |
| 1830 | for(;;){ |
| 1831 | if (!mnoread) |
| 1832 | n = mread(adrs, val, size); |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 1833 | printf(REG"%c", adrs, brev? 'r': ' '); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | if (!mnoread) { |
| 1835 | if (brev) |
| 1836 | byterev(val, size); |
| 1837 | putchar(' '); |
| 1838 | for (i = 0; i < n; ++i) |
| 1839 | printf("%.2x", val[i]); |
| 1840 | for (; i < size; ++i) |
| 1841 | printf("%s", fault_chars[fault_type]); |
| 1842 | } |
| 1843 | putchar(' '); |
| 1844 | inc = size; |
| 1845 | nslash = 0; |
| 1846 | for(;;){ |
| 1847 | if( scanhex(&n) ){ |
| 1848 | for (i = 0; i < size; ++i) |
| 1849 | val[i] = n >> (i * 8); |
| 1850 | if (!brev) |
| 1851 | byterev(val, size); |
| 1852 | mwrite(adrs, val, size); |
| 1853 | inc = size; |
| 1854 | } |
| 1855 | cmd = skipbl(); |
| 1856 | if (cmd == '\n') |
| 1857 | break; |
| 1858 | inc = 0; |
| 1859 | switch (cmd) { |
| 1860 | case '\'': |
| 1861 | for(;;){ |
| 1862 | n = inchar(); |
| 1863 | if( n == '\\' ) |
| 1864 | n = bsesc(); |
| 1865 | else if( n == '\'' ) |
| 1866 | break; |
| 1867 | for (i = 0; i < size; ++i) |
| 1868 | val[i] = n >> (i * 8); |
| 1869 | if (!brev) |
| 1870 | byterev(val, size); |
| 1871 | mwrite(adrs, val, size); |
| 1872 | adrs += size; |
| 1873 | } |
| 1874 | adrs -= size; |
| 1875 | inc = size; |
| 1876 | break; |
| 1877 | case ',': |
| 1878 | adrs += size; |
| 1879 | break; |
| 1880 | case '.': |
| 1881 | mnoread = 0; |
| 1882 | break; |
| 1883 | case ';': |
| 1884 | break; |
| 1885 | case 'x': |
| 1886 | case EOF: |
| 1887 | scannl(); |
| 1888 | return; |
| 1889 | case 'b': |
| 1890 | case 'v': |
| 1891 | size = 1; |
| 1892 | break; |
| 1893 | case 'w': |
| 1894 | size = 2; |
| 1895 | break; |
| 1896 | case 'l': |
| 1897 | size = 4; |
| 1898 | break; |
| 1899 | case 'u': |
| 1900 | size = 8; |
| 1901 | break; |
| 1902 | case '^': |
| 1903 | adrs -= size; |
| 1904 | break; |
| 1905 | break; |
| 1906 | case '/': |
| 1907 | if (nslash > 0) |
| 1908 | adrs -= 1 << nslash; |
| 1909 | else |
| 1910 | nslash = 0; |
| 1911 | nslash += 4; |
| 1912 | adrs += 1 << nslash; |
| 1913 | break; |
| 1914 | case '\\': |
| 1915 | if (nslash < 0) |
| 1916 | adrs += 1 << -nslash; |
| 1917 | else |
| 1918 | nslash = 0; |
| 1919 | nslash -= 4; |
| 1920 | adrs -= 1 << -nslash; |
| 1921 | break; |
| 1922 | case 'm': |
| 1923 | scanhex((void *)&adrs); |
| 1924 | break; |
| 1925 | case 'n': |
| 1926 | mnoread = 1; |
| 1927 | break; |
| 1928 | case 'r': |
| 1929 | brev = !brev; |
| 1930 | break; |
| 1931 | case '<': |
| 1932 | n = size; |
| 1933 | scanhex(&n); |
| 1934 | adrs -= n; |
| 1935 | break; |
| 1936 | case '>': |
| 1937 | n = size; |
| 1938 | scanhex(&n); |
| 1939 | adrs += n; |
| 1940 | break; |
| 1941 | case '?': |
| 1942 | printf(memex_subcmd_help_string); |
| 1943 | break; |
| 1944 | } |
| 1945 | } |
| 1946 | adrs += inc; |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | int |
| 1951 | bsesc(void) |
| 1952 | { |
| 1953 | int c; |
| 1954 | |
| 1955 | c = inchar(); |
| 1956 | switch( c ){ |
| 1957 | case 'n': c = '\n'; break; |
| 1958 | case 'r': c = '\r'; break; |
| 1959 | case 'b': c = '\b'; break; |
| 1960 | case 't': c = '\t'; break; |
| 1961 | } |
| 1962 | return c; |
| 1963 | } |
| 1964 | |
Olaf Hering | 7e5b593 | 2006-03-08 20:40:28 +0100 | [diff] [blame] | 1965 | static void xmon_rawdump (unsigned long adrs, long ndump) |
| 1966 | { |
| 1967 | long n, m, r, nr; |
| 1968 | unsigned char temp[16]; |
| 1969 | |
| 1970 | for (n = ndump; n > 0;) { |
| 1971 | r = n < 16? n: 16; |
| 1972 | nr = mread(adrs, temp, r); |
| 1973 | adrs += nr; |
| 1974 | for (m = 0; m < r; ++m) { |
| 1975 | if (m < nr) |
| 1976 | printf("%.2x", temp[m]); |
| 1977 | else |
| 1978 | printf("%s", fault_chars[fault_type]); |
| 1979 | } |
| 1980 | n -= r; |
| 1981 | if (nr < r) |
| 1982 | break; |
| 1983 | } |
| 1984 | printf("\n"); |
| 1985 | } |
| 1986 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
| 1988 | || ('a' <= (c) && (c) <= 'f') \ |
| 1989 | || ('A' <= (c) && (c) <= 'F')) |
| 1990 | void |
| 1991 | dump(void) |
| 1992 | { |
| 1993 | int c; |
| 1994 | |
| 1995 | c = inchar(); |
| 1996 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
| 1997 | termch = c; |
| 1998 | scanhex((void *)&adrs); |
| 1999 | if (termch != '\n') |
| 2000 | termch = 0; |
| 2001 | if (c == 'i') { |
| 2002 | scanhex(&nidump); |
| 2003 | if (nidump == 0) |
| 2004 | nidump = 16; |
| 2005 | else if (nidump > MAX_DUMP) |
| 2006 | nidump = MAX_DUMP; |
| 2007 | adrs += ppc_inst_dump(adrs, nidump, 1); |
| 2008 | last_cmd = "di\n"; |
Olaf Hering | 7e5b593 | 2006-03-08 20:40:28 +0100 | [diff] [blame] | 2009 | } else if (c == 'r') { |
| 2010 | scanhex(&ndump); |
| 2011 | if (ndump == 0) |
| 2012 | ndump = 64; |
| 2013 | xmon_rawdump(adrs, ndump); |
| 2014 | adrs += ndump; |
| 2015 | last_cmd = "dr\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | } else { |
| 2017 | scanhex(&ndump); |
| 2018 | if (ndump == 0) |
| 2019 | ndump = 64; |
| 2020 | else if (ndump > MAX_DUMP) |
| 2021 | ndump = MAX_DUMP; |
| 2022 | prdump(adrs, ndump); |
| 2023 | adrs += ndump; |
| 2024 | last_cmd = "d\n"; |
| 2025 | } |
| 2026 | } |
| 2027 | |
| 2028 | void |
| 2029 | prdump(unsigned long adrs, long ndump) |
| 2030 | { |
| 2031 | long n, m, c, r, nr; |
| 2032 | unsigned char temp[16]; |
| 2033 | |
| 2034 | for (n = ndump; n > 0;) { |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2035 | printf(REG, adrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | putchar(' '); |
| 2037 | r = n < 16? n: 16; |
| 2038 | nr = mread(adrs, temp, r); |
| 2039 | adrs += nr; |
| 2040 | for (m = 0; m < r; ++m) { |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 2041 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
| 2042 | putchar(' '); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | if (m < nr) |
| 2044 | printf("%.2x", temp[m]); |
| 2045 | else |
| 2046 | printf("%s", fault_chars[fault_type]); |
| 2047 | } |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 2048 | for (; m < 16; ++m) { |
| 2049 | if ((m & (sizeof(long) - 1)) == 0) |
| 2050 | putchar(' '); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | printf(" "); |
Paul Mackerras | e1449ed | 2005-11-10 14:30:20 +1100 | [diff] [blame] | 2052 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | printf(" |"); |
| 2054 | for (m = 0; m < r; ++m) { |
| 2055 | if (m < nr) { |
| 2056 | c = temp[m]; |
| 2057 | putchar(' ' <= c && c <= '~'? c: '.'); |
| 2058 | } else |
| 2059 | putchar(' '); |
| 2060 | } |
| 2061 | n -= r; |
| 2062 | for (; m < 16; ++m) |
| 2063 | putchar(' '); |
| 2064 | printf("|\n"); |
| 2065 | if (nr < r) |
| 2066 | break; |
| 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | int |
| 2071 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
| 2072 | { |
| 2073 | int nr, dotted; |
| 2074 | unsigned long first_adr; |
| 2075 | unsigned long inst, last_inst = 0; |
| 2076 | unsigned char val[4]; |
| 2077 | |
| 2078 | dotted = 0; |
| 2079 | for (first_adr = adr; count > 0; --count, adr += 4) { |
| 2080 | nr = mread(adr, val, 4); |
| 2081 | if (nr == 0) { |
| 2082 | if (praddr) { |
| 2083 | const char *x = fault_chars[fault_type]; |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2084 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | } |
| 2086 | break; |
| 2087 | } |
| 2088 | inst = GETWORD(val); |
| 2089 | if (adr > first_adr && inst == last_inst) { |
| 2090 | if (!dotted) { |
| 2091 | printf(" ...\n"); |
| 2092 | dotted = 1; |
| 2093 | } |
| 2094 | continue; |
| 2095 | } |
| 2096 | dotted = 0; |
| 2097 | last_inst = inst; |
| 2098 | if (praddr) |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2099 | printf(REG" %.8x", adr, inst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | printf("\t"); |
| 2101 | print_insn_powerpc(inst, adr, 0); /* always returns 4 */ |
| 2102 | printf("\n"); |
| 2103 | } |
| 2104 | return adr - first_adr; |
| 2105 | } |
| 2106 | |
| 2107 | void |
| 2108 | print_address(unsigned long addr) |
| 2109 | { |
| 2110 | xmon_print_symbol(addr, "\t# ", ""); |
| 2111 | } |
| 2112 | |
| 2113 | |
| 2114 | /* |
| 2115 | * Memory operations - move, set, print differences |
| 2116 | */ |
| 2117 | static unsigned long mdest; /* destination address */ |
| 2118 | static unsigned long msrc; /* source address */ |
| 2119 | static unsigned long mval; /* byte value to set memory to */ |
| 2120 | static unsigned long mcount; /* # bytes to affect */ |
| 2121 | static unsigned long mdiffs; /* max # differences to print */ |
| 2122 | |
| 2123 | void |
| 2124 | memops(int cmd) |
| 2125 | { |
| 2126 | scanhex((void *)&mdest); |
| 2127 | if( termch != '\n' ) |
| 2128 | termch = 0; |
| 2129 | scanhex((void *)(cmd == 's'? &mval: &msrc)); |
| 2130 | if( termch != '\n' ) |
| 2131 | termch = 0; |
| 2132 | scanhex((void *)&mcount); |
| 2133 | switch( cmd ){ |
| 2134 | case 'm': |
| 2135 | memmove((void *)mdest, (void *)msrc, mcount); |
| 2136 | break; |
| 2137 | case 's': |
| 2138 | memset((void *)mdest, mval, mcount); |
| 2139 | break; |
| 2140 | case 'd': |
| 2141 | if( termch != '\n' ) |
| 2142 | termch = 0; |
| 2143 | scanhex((void *)&mdiffs); |
| 2144 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); |
| 2145 | break; |
| 2146 | } |
| 2147 | } |
| 2148 | |
| 2149 | void |
| 2150 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
| 2151 | { |
| 2152 | unsigned n, prt; |
| 2153 | |
| 2154 | prt = 0; |
| 2155 | for( n = nb; n > 0; --n ) |
| 2156 | if( *p1++ != *p2++ ) |
| 2157 | if( ++prt <= maxpr ) |
| 2158 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, |
| 2159 | p1[-1], p2 - 1, p2[-1]); |
| 2160 | if( prt > maxpr ) |
| 2161 | printf("Total of %d differences\n", prt); |
| 2162 | } |
| 2163 | |
| 2164 | static unsigned mend; |
| 2165 | static unsigned mask; |
| 2166 | |
| 2167 | void |
| 2168 | memlocate(void) |
| 2169 | { |
| 2170 | unsigned a, n; |
| 2171 | unsigned char val[4]; |
| 2172 | |
| 2173 | last_cmd = "ml"; |
| 2174 | scanhex((void *)&mdest); |
| 2175 | if (termch != '\n') { |
| 2176 | termch = 0; |
| 2177 | scanhex((void *)&mend); |
| 2178 | if (termch != '\n') { |
| 2179 | termch = 0; |
| 2180 | scanhex((void *)&mval); |
| 2181 | mask = ~0; |
| 2182 | if (termch != '\n') termch = 0; |
| 2183 | scanhex((void *)&mask); |
| 2184 | } |
| 2185 | } |
| 2186 | n = 0; |
| 2187 | for (a = mdest; a < mend; a += 4) { |
| 2188 | if (mread(a, val, 4) == 4 |
| 2189 | && ((GETWORD(val) ^ mval) & mask) == 0) { |
| 2190 | printf("%.16x: %.16x\n", a, GETWORD(val)); |
| 2191 | if (++n >= 10) |
| 2192 | break; |
| 2193 | } |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | static unsigned long mskip = 0x1000; |
| 2198 | static unsigned long mlim = 0xffffffff; |
| 2199 | |
| 2200 | void |
| 2201 | memzcan(void) |
| 2202 | { |
| 2203 | unsigned char v; |
| 2204 | unsigned a; |
| 2205 | int ok, ook; |
| 2206 | |
| 2207 | scanhex(&mdest); |
| 2208 | if (termch != '\n') termch = 0; |
| 2209 | scanhex(&mskip); |
| 2210 | if (termch != '\n') termch = 0; |
| 2211 | scanhex(&mlim); |
| 2212 | ook = 0; |
| 2213 | for (a = mdest; a < mlim; a += mskip) { |
| 2214 | ok = mread(a, &v, 1); |
| 2215 | if (ok && !ook) { |
| 2216 | printf("%.8x .. ", a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | } else if (!ok && ook) |
| 2218 | printf("%.8x\n", a - mskip); |
| 2219 | ook = ok; |
| 2220 | if (a + mskip < a) |
| 2221 | break; |
| 2222 | } |
| 2223 | if (ook) |
| 2224 | printf("%.8x\n", a - mskip); |
| 2225 | } |
| 2226 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2227 | void proccall(void) |
| 2228 | { |
| 2229 | unsigned long args[8]; |
| 2230 | unsigned long ret; |
| 2231 | int i; |
| 2232 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, |
| 2233 | unsigned long, unsigned long, unsigned long, |
| 2234 | unsigned long, unsigned long, unsigned long); |
| 2235 | callfunc_t func; |
| 2236 | |
| 2237 | if (!scanhex(&adrs)) |
| 2238 | return; |
| 2239 | if (termch != '\n') |
| 2240 | termch = 0; |
| 2241 | for (i = 0; i < 8; ++i) |
| 2242 | args[i] = 0; |
| 2243 | for (i = 0; i < 8; ++i) { |
| 2244 | if (!scanhex(&args[i]) || termch == '\n') |
| 2245 | break; |
| 2246 | termch = 0; |
| 2247 | } |
| 2248 | func = (callfunc_t) adrs; |
| 2249 | ret = 0; |
| 2250 | if (setjmp(bus_error_jmp) == 0) { |
| 2251 | catch_memory_errors = 1; |
| 2252 | sync(); |
| 2253 | ret = func(args[0], args[1], args[2], args[3], |
| 2254 | args[4], args[5], args[6], args[7]); |
| 2255 | sync(); |
| 2256 | printf("return value is %x\n", ret); |
| 2257 | } else { |
| 2258 | printf("*** %x exception occurred\n", fault_except); |
| 2259 | } |
| 2260 | catch_memory_errors = 0; |
| 2261 | } |
| 2262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | /* Input scanning routines */ |
| 2264 | int |
| 2265 | skipbl(void) |
| 2266 | { |
| 2267 | int c; |
| 2268 | |
| 2269 | if( termch != 0 ){ |
| 2270 | c = termch; |
| 2271 | termch = 0; |
| 2272 | } else |
| 2273 | c = inchar(); |
| 2274 | while( c == ' ' || c == '\t' ) |
| 2275 | c = inchar(); |
| 2276 | return c; |
| 2277 | } |
| 2278 | |
| 2279 | #define N_PTREGS 44 |
| 2280 | static char *regnames[N_PTREGS] = { |
| 2281 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 2282 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 2283 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
| 2284 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2285 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
| 2286 | #ifdef CONFIG_PPC64 |
| 2287 | "softe", |
| 2288 | #else |
| 2289 | "mq", |
| 2290 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | "trap", "dar", "dsisr", "res" |
| 2292 | }; |
| 2293 | |
| 2294 | int |
| 2295 | scanhex(unsigned long *vp) |
| 2296 | { |
| 2297 | int c, d; |
| 2298 | unsigned long v; |
| 2299 | |
| 2300 | c = skipbl(); |
| 2301 | if (c == '%') { |
| 2302 | /* parse register name */ |
| 2303 | char regname[8]; |
| 2304 | int i; |
| 2305 | |
| 2306 | for (i = 0; i < sizeof(regname) - 1; ++i) { |
| 2307 | c = inchar(); |
| 2308 | if (!isalnum(c)) { |
| 2309 | termch = c; |
| 2310 | break; |
| 2311 | } |
| 2312 | regname[i] = c; |
| 2313 | } |
| 2314 | regname[i] = 0; |
| 2315 | for (i = 0; i < N_PTREGS; ++i) { |
| 2316 | if (strcmp(regnames[i], regname) == 0) { |
| 2317 | if (xmon_regs == NULL) { |
| 2318 | printf("regs not available\n"); |
| 2319 | return 0; |
| 2320 | } |
| 2321 | *vp = ((unsigned long *)xmon_regs)[i]; |
| 2322 | return 1; |
| 2323 | } |
| 2324 | } |
| 2325 | printf("invalid register name '%%%s'\n", regname); |
| 2326 | return 0; |
| 2327 | } |
| 2328 | |
| 2329 | /* skip leading "0x" if any */ |
| 2330 | |
| 2331 | if (c == '0') { |
| 2332 | c = inchar(); |
| 2333 | if (c == 'x') { |
| 2334 | c = inchar(); |
| 2335 | } else { |
| 2336 | d = hexdigit(c); |
| 2337 | if (d == EOF) { |
| 2338 | termch = c; |
| 2339 | *vp = 0; |
| 2340 | return 1; |
| 2341 | } |
| 2342 | } |
| 2343 | } else if (c == '$') { |
| 2344 | int i; |
| 2345 | for (i=0; i<63; i++) { |
| 2346 | c = inchar(); |
| 2347 | if (isspace(c)) { |
| 2348 | termch = c; |
| 2349 | break; |
| 2350 | } |
| 2351 | tmpstr[i] = c; |
| 2352 | } |
| 2353 | tmpstr[i++] = 0; |
Benjamin Herrenschmidt | 6879dc1 | 2005-06-21 17:15:30 -0700 | [diff] [blame] | 2354 | *vp = 0; |
| 2355 | if (setjmp(bus_error_jmp) == 0) { |
| 2356 | catch_memory_errors = 1; |
| 2357 | sync(); |
| 2358 | *vp = kallsyms_lookup_name(tmpstr); |
| 2359 | sync(); |
| 2360 | } |
| 2361 | catch_memory_errors = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | if (!(*vp)) { |
| 2363 | printf("unknown symbol '%s'\n", tmpstr); |
| 2364 | return 0; |
| 2365 | } |
| 2366 | return 1; |
| 2367 | } |
| 2368 | |
| 2369 | d = hexdigit(c); |
| 2370 | if (d == EOF) { |
| 2371 | termch = c; |
| 2372 | return 0; |
| 2373 | } |
| 2374 | v = 0; |
| 2375 | do { |
| 2376 | v = (v << 4) + d; |
| 2377 | c = inchar(); |
| 2378 | d = hexdigit(c); |
| 2379 | } while (d != EOF); |
| 2380 | termch = c; |
| 2381 | *vp = v; |
| 2382 | return 1; |
| 2383 | } |
| 2384 | |
| 2385 | void |
| 2386 | scannl(void) |
| 2387 | { |
| 2388 | int c; |
| 2389 | |
| 2390 | c = termch; |
| 2391 | termch = 0; |
| 2392 | while( c != '\n' ) |
| 2393 | c = inchar(); |
| 2394 | } |
| 2395 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2396 | int hexdigit(int c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | { |
| 2398 | if( '0' <= c && c <= '9' ) |
| 2399 | return c - '0'; |
| 2400 | if( 'A' <= c && c <= 'F' ) |
| 2401 | return c - ('A' - 10); |
| 2402 | if( 'a' <= c && c <= 'f' ) |
| 2403 | return c - ('a' - 10); |
| 2404 | return EOF; |
| 2405 | } |
| 2406 | |
| 2407 | void |
| 2408 | getstring(char *s, int size) |
| 2409 | { |
| 2410 | int c; |
| 2411 | |
| 2412 | c = skipbl(); |
| 2413 | do { |
| 2414 | if( size > 1 ){ |
| 2415 | *s++ = c; |
| 2416 | --size; |
| 2417 | } |
| 2418 | c = inchar(); |
| 2419 | } while( c != ' ' && c != '\t' && c != '\n' ); |
| 2420 | termch = c; |
| 2421 | *s = 0; |
| 2422 | } |
| 2423 | |
| 2424 | static char line[256]; |
| 2425 | static char *lineptr; |
| 2426 | |
| 2427 | void |
| 2428 | flush_input(void) |
| 2429 | { |
| 2430 | lineptr = NULL; |
| 2431 | } |
| 2432 | |
| 2433 | int |
| 2434 | inchar(void) |
| 2435 | { |
| 2436 | if (lineptr == NULL || *lineptr == 0) { |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2437 | if (xmon_gets(line, sizeof(line)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | lineptr = NULL; |
| 2439 | return EOF; |
| 2440 | } |
| 2441 | lineptr = line; |
| 2442 | } |
| 2443 | return *lineptr++; |
| 2444 | } |
| 2445 | |
| 2446 | void |
| 2447 | take_input(char *str) |
| 2448 | { |
| 2449 | lineptr = str; |
| 2450 | } |
| 2451 | |
| 2452 | |
| 2453 | static void |
| 2454 | symbol_lookup(void) |
| 2455 | { |
| 2456 | int type = inchar(); |
| 2457 | unsigned long addr; |
| 2458 | static char tmp[64]; |
| 2459 | |
| 2460 | switch (type) { |
| 2461 | case 'a': |
| 2462 | if (scanhex(&addr)) |
| 2463 | xmon_print_symbol(addr, ": ", "\n"); |
| 2464 | termch = 0; |
| 2465 | break; |
| 2466 | case 's': |
| 2467 | getstring(tmp, 64); |
| 2468 | if (setjmp(bus_error_jmp) == 0) { |
| 2469 | catch_memory_errors = 1; |
| 2470 | sync(); |
| 2471 | addr = kallsyms_lookup_name(tmp); |
| 2472 | if (addr) |
| 2473 | printf("%s: %lx\n", tmp, addr); |
| 2474 | else |
| 2475 | printf("Symbol '%s' not found.\n", tmp); |
| 2476 | sync(); |
| 2477 | } |
| 2478 | catch_memory_errors = 0; |
| 2479 | termch = 0; |
| 2480 | break; |
| 2481 | } |
| 2482 | } |
| 2483 | |
| 2484 | |
| 2485 | /* Print an address in numeric and symbolic form (if possible) */ |
| 2486 | static void xmon_print_symbol(unsigned long address, const char *mid, |
| 2487 | const char *after) |
| 2488 | { |
| 2489 | char *modname; |
| 2490 | const char *name = NULL; |
| 2491 | unsigned long offset, size; |
| 2492 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2493 | printf(REG, address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | if (setjmp(bus_error_jmp) == 0) { |
| 2495 | catch_memory_errors = 1; |
| 2496 | sync(); |
| 2497 | name = kallsyms_lookup(address, &size, &offset, &modname, |
| 2498 | tmpstr); |
| 2499 | sync(); |
| 2500 | /* wait a little while to see if we get a machine check */ |
| 2501 | __delay(200); |
| 2502 | } |
| 2503 | |
| 2504 | catch_memory_errors = 0; |
| 2505 | |
| 2506 | if (name) { |
| 2507 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); |
| 2508 | if (modname) |
| 2509 | printf(" [%s]", modname); |
| 2510 | } |
| 2511 | printf("%s", after); |
| 2512 | } |
| 2513 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2514 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | static void dump_slb(void) |
| 2516 | { |
| 2517 | int i; |
| 2518 | unsigned long tmp; |
| 2519 | |
| 2520 | printf("SLB contents of cpu %x\n", smp_processor_id()); |
| 2521 | |
| 2522 | for (i = 0; i < SLB_NUM_ENTRIES; i++) { |
| 2523 | asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); |
| 2524 | printf("%02d %016lx ", i, tmp); |
| 2525 | |
| 2526 | asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); |
| 2527 | printf("%016lx\n", tmp); |
| 2528 | } |
| 2529 | } |
| 2530 | |
| 2531 | static void dump_stab(void) |
| 2532 | { |
| 2533 | int i; |
| 2534 | unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; |
| 2535 | |
| 2536 | printf("Segment table contents of cpu %x\n", smp_processor_id()); |
| 2537 | |
| 2538 | for (i = 0; i < PAGE_SIZE/16; i++) { |
| 2539 | unsigned long a, b; |
| 2540 | |
| 2541 | a = *tmp++; |
| 2542 | b = *tmp++; |
| 2543 | |
| 2544 | if (a || b) { |
| 2545 | printf("%03d %016lx ", i, a); |
| 2546 | printf("%016lx\n", b); |
| 2547 | } |
| 2548 | } |
| 2549 | } |
| 2550 | |
Paul Mackerras | f78541d | 2005-10-28 22:53:37 +1000 | [diff] [blame] | 2551 | void dump_segments(void) |
| 2552 | { |
| 2553 | if (cpu_has_feature(CPU_FTR_SLB)) |
| 2554 | dump_slb(); |
| 2555 | else |
| 2556 | dump_stab(); |
| 2557 | } |
| 2558 | #endif |
| 2559 | |
| 2560 | #ifdef CONFIG_PPC_STD_MMU_32 |
| 2561 | void dump_segments(void) |
| 2562 | { |
| 2563 | int i; |
| 2564 | |
| 2565 | printf("sr0-15 ="); |
| 2566 | for (i = 0; i < 16; ++i) |
| 2567 | printf(" %x", mfsrin(i)); |
| 2568 | printf("\n"); |
| 2569 | } |
| 2570 | #endif |
| 2571 | |
Olaf Hering | b13cfd17 | 2005-08-04 19:26:42 +0200 | [diff] [blame] | 2572 | void xmon_init(int enable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | { |
Olaf Hering | b13cfd17 | 2005-08-04 19:26:42 +0200 | [diff] [blame] | 2574 | if (enable) { |
| 2575 | __debugger = xmon; |
| 2576 | __debugger_ipi = xmon_ipi; |
| 2577 | __debugger_bpt = xmon_bpt; |
| 2578 | __debugger_sstep = xmon_sstep; |
| 2579 | __debugger_iabr_match = xmon_iabr_match; |
| 2580 | __debugger_dabr_match = xmon_dabr_match; |
| 2581 | __debugger_fault_handler = xmon_fault_handler; |
| 2582 | } else { |
| 2583 | __debugger = NULL; |
| 2584 | __debugger_ipi = NULL; |
| 2585 | __debugger_bpt = NULL; |
| 2586 | __debugger_sstep = NULL; |
| 2587 | __debugger_iabr_match = NULL; |
| 2588 | __debugger_dabr_match = NULL; |
| 2589 | __debugger_fault_handler = NULL; |
| 2590 | } |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2591 | xmon_map_scc(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | } |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2593 | |
| 2594 | #ifdef CONFIG_MAGIC_SYSRQ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2595 | static void sysrq_handle_xmon(int key, struct tty_struct *tty) |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2596 | { |
| 2597 | /* ensure xmon is enabled */ |
| 2598 | xmon_init(1); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2599 | debugger(get_irq_regs()); |
Paul Mackerras | fca5dcd | 2005-11-08 22:55:08 +1100 | [diff] [blame] | 2600 | } |
| 2601 | |
| 2602 | static struct sysrq_key_op sysrq_xmon_op = |
| 2603 | { |
| 2604 | .handler = sysrq_handle_xmon, |
| 2605 | .help_msg = "Xmon", |
| 2606 | .action_msg = "Entering xmon", |
| 2607 | }; |
| 2608 | |
| 2609 | static int __init setup_xmon_sysrq(void) |
| 2610 | { |
| 2611 | register_sysrq_key('x', &sysrq_xmon_op); |
| 2612 | return 0; |
| 2613 | } |
| 2614 | __initcall(setup_xmon_sysrq); |
| 2615 | #endif /* CONFIG_MAGIC_SYSRQ */ |
Michael Ellerman | 47679283 | 2006-10-03 14:12:08 +1000 | [diff] [blame] | 2616 | |
| 2617 | int __initdata xmon_early, xmon_off; |
| 2618 | |
| 2619 | static int __init early_parse_xmon(char *p) |
| 2620 | { |
| 2621 | if (!p || strncmp(p, "early", 5) == 0) { |
| 2622 | /* just "xmon" is equivalent to "xmon=early" */ |
| 2623 | xmon_init(1); |
| 2624 | xmon_early = 1; |
| 2625 | } else if (strncmp(p, "on", 2) == 0) |
| 2626 | xmon_init(1); |
| 2627 | else if (strncmp(p, "off", 3) == 0) |
| 2628 | xmon_off = 1; |
| 2629 | else if (strncmp(p, "nobt", 4) == 0) |
| 2630 | xmon_no_auto_backtrace = 1; |
| 2631 | else |
| 2632 | return 1; |
| 2633 | |
| 2634 | return 0; |
| 2635 | } |
| 2636 | early_param("xmon", early_parse_xmon); |
| 2637 | |
| 2638 | void __init xmon_setup(void) |
| 2639 | { |
| 2640 | #ifdef CONFIG_XMON_DEFAULT |
| 2641 | if (!xmon_off) |
| 2642 | xmon_init(1); |
| 2643 | #endif |
| 2644 | if (xmon_early) |
| 2645 | debugger(NULL); |
| 2646 | } |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 2647 | |
| 2648 | #ifdef CONFIG_PPC_CELL |
| 2649 | |
| 2650 | struct spu_info { |
| 2651 | struct spu *spu; |
| 2652 | u64 saved_mfc_sr1_RW; |
| 2653 | u32 saved_spu_runcntl_RW; |
| 2654 | u8 stopped_ok; |
| 2655 | }; |
| 2656 | |
| 2657 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ |
| 2658 | |
| 2659 | static struct spu_info spu_info[XMON_NUM_SPUS]; |
| 2660 | |
| 2661 | void xmon_register_spus(struct list_head *list) |
| 2662 | { |
| 2663 | struct spu *spu; |
| 2664 | |
| 2665 | list_for_each_entry(spu, list, full_list) { |
| 2666 | if (spu->number >= XMON_NUM_SPUS) { |
| 2667 | WARN_ON(1); |
| 2668 | continue; |
| 2669 | } |
| 2670 | |
| 2671 | spu_info[spu->number].spu = spu; |
| 2672 | spu_info[spu->number].stopped_ok = 0; |
| 2673 | } |
| 2674 | } |
| 2675 | |
| 2676 | static void stop_spus(void) |
| 2677 | { |
| 2678 | struct spu *spu; |
| 2679 | int i; |
| 2680 | u64 tmp; |
| 2681 | |
| 2682 | for (i = 0; i < XMON_NUM_SPUS; i++) { |
| 2683 | if (!spu_info[i].spu) |
| 2684 | continue; |
| 2685 | |
| 2686 | if (setjmp(bus_error_jmp) == 0) { |
| 2687 | catch_memory_errors = 1; |
| 2688 | sync(); |
| 2689 | |
| 2690 | spu = spu_info[i].spu; |
| 2691 | |
| 2692 | spu_info[i].saved_spu_runcntl_RW = |
| 2693 | in_be32(&spu->problem->spu_runcntl_RW); |
| 2694 | |
| 2695 | tmp = spu_mfc_sr1_get(spu); |
| 2696 | spu_info[i].saved_mfc_sr1_RW = tmp; |
| 2697 | |
| 2698 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; |
| 2699 | spu_mfc_sr1_set(spu, tmp); |
| 2700 | |
| 2701 | sync(); |
| 2702 | __delay(200); |
| 2703 | |
| 2704 | spu_info[i].stopped_ok = 1; |
| 2705 | printf("Stopped spu %.2d\n", i); |
| 2706 | } else { |
| 2707 | catch_memory_errors = 0; |
| 2708 | printf("*** Error stopping spu %.2d\n", i); |
| 2709 | } |
| 2710 | catch_memory_errors = 0; |
| 2711 | } |
| 2712 | } |
| 2713 | |
| 2714 | static void restart_spus(void) |
| 2715 | { |
| 2716 | struct spu *spu; |
| 2717 | int i; |
| 2718 | |
| 2719 | for (i = 0; i < XMON_NUM_SPUS; i++) { |
| 2720 | if (!spu_info[i].spu) |
| 2721 | continue; |
| 2722 | |
| 2723 | if (!spu_info[i].stopped_ok) { |
| 2724 | printf("*** Error, spu %d was not successfully stopped" |
| 2725 | ", not restarting\n", i); |
| 2726 | continue; |
| 2727 | } |
| 2728 | |
| 2729 | if (setjmp(bus_error_jmp) == 0) { |
| 2730 | catch_memory_errors = 1; |
| 2731 | sync(); |
| 2732 | |
| 2733 | spu = spu_info[i].spu; |
| 2734 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); |
| 2735 | out_be32(&spu->problem->spu_runcntl_RW, |
| 2736 | spu_info[i].saved_spu_runcntl_RW); |
| 2737 | |
| 2738 | sync(); |
| 2739 | __delay(200); |
| 2740 | |
| 2741 | printf("Restarted spu %.2d\n", i); |
| 2742 | } else { |
| 2743 | catch_memory_errors = 0; |
| 2744 | printf("*** Error restarting spu %.2d\n", i); |
| 2745 | } |
| 2746 | catch_memory_errors = 0; |
| 2747 | } |
| 2748 | } |
| 2749 | |
Michael Ellerman | a898497 | 2006-10-24 18:31:28 +0200 | [diff] [blame] | 2750 | #define DUMP_WIDTH 23 |
| 2751 | #define DUMP_FIELD(obj, format, field) \ |
| 2752 | do { \ |
| 2753 | if (setjmp(bus_error_jmp) == 0) { \ |
| 2754 | catch_memory_errors = 1; \ |
| 2755 | sync(); \ |
| 2756 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ |
| 2757 | #field, obj->field); \ |
| 2758 | sync(); \ |
| 2759 | __delay(200); \ |
| 2760 | } else { \ |
| 2761 | catch_memory_errors = 0; \ |
| 2762 | printf(" %-*s = *** Error reading field.\n", \ |
| 2763 | DUMP_WIDTH, #field); \ |
| 2764 | } \ |
| 2765 | catch_memory_errors = 0; \ |
| 2766 | } while (0) |
| 2767 | |
| 2768 | static void dump_spu_fields(struct spu *spu) |
| 2769 | { |
| 2770 | printf("Dumping spu fields at address %p:\n", spu); |
| 2771 | |
| 2772 | DUMP_FIELD(spu, "0x%x", number); |
| 2773 | DUMP_FIELD(spu, "%s", name); |
| 2774 | DUMP_FIELD(spu, "%s", devnode->full_name); |
| 2775 | DUMP_FIELD(spu, "0x%x", nid); |
| 2776 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
| 2777 | DUMP_FIELD(spu, "0x%p", local_store); |
| 2778 | DUMP_FIELD(spu, "0x%lx", ls_size); |
| 2779 | DUMP_FIELD(spu, "0x%x", node); |
| 2780 | DUMP_FIELD(spu, "0x%lx", flags); |
| 2781 | DUMP_FIELD(spu, "0x%lx", dar); |
| 2782 | DUMP_FIELD(spu, "0x%lx", dsisr); |
| 2783 | DUMP_FIELD(spu, "%d", class_0_pending); |
| 2784 | DUMP_FIELD(spu, "0x%lx", irqs[0]); |
| 2785 | DUMP_FIELD(spu, "0x%lx", irqs[1]); |
| 2786 | DUMP_FIELD(spu, "0x%lx", irqs[2]); |
| 2787 | DUMP_FIELD(spu, "0x%x", slb_replace); |
| 2788 | DUMP_FIELD(spu, "%d", pid); |
| 2789 | DUMP_FIELD(spu, "%d", prio); |
| 2790 | DUMP_FIELD(spu, "0x%p", mm); |
| 2791 | DUMP_FIELD(spu, "0x%p", ctx); |
| 2792 | DUMP_FIELD(spu, "0x%p", rq); |
| 2793 | DUMP_FIELD(spu, "0x%p", timestamp); |
| 2794 | DUMP_FIELD(spu, "0x%lx", problem_phys); |
| 2795 | DUMP_FIELD(spu, "0x%p", problem); |
| 2796 | DUMP_FIELD(spu, "0x%x", problem->spu_runcntl_RW); |
| 2797 | DUMP_FIELD(spu, "0x%x", problem->spu_status_R); |
| 2798 | DUMP_FIELD(spu, "0x%x", problem->spu_npc_RW); |
| 2799 | DUMP_FIELD(spu, "0x%p", priv1); |
| 2800 | |
| 2801 | if (spu->priv1) |
| 2802 | DUMP_FIELD(spu, "0x%lx", priv1->mfc_sr1_RW); |
| 2803 | |
| 2804 | DUMP_FIELD(spu, "0x%p", priv2); |
| 2805 | } |
| 2806 | |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 2807 | static int do_spu_cmd(void) |
| 2808 | { |
Michael Ellerman | a898497 | 2006-10-24 18:31:28 +0200 | [diff] [blame] | 2809 | unsigned long num = 0; |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 2810 | int cmd; |
| 2811 | |
| 2812 | cmd = inchar(); |
| 2813 | switch (cmd) { |
| 2814 | case 's': |
| 2815 | stop_spus(); |
| 2816 | break; |
| 2817 | case 'r': |
| 2818 | restart_spus(); |
| 2819 | break; |
Michael Ellerman | a898497 | 2006-10-24 18:31:28 +0200 | [diff] [blame] | 2820 | case 'f': |
| 2821 | if (scanhex(&num) && num < XMON_NUM_SPUS && spu_info[num].spu) |
| 2822 | dump_spu_fields(spu_info[num].spu); |
| 2823 | else |
| 2824 | printf("*** Error: invalid spu number\n"); |
| 2825 | break; |
Michael Ellerman | ff8a8f2 | 2006-10-24 18:31:27 +0200 | [diff] [blame] | 2826 | default: |
| 2827 | return -1; |
| 2828 | } |
| 2829 | |
| 2830 | return 0; |
| 2831 | } |
| 2832 | #else /* ! CONFIG_PPC_CELL */ |
| 2833 | static int do_spu_cmd(void) |
| 2834 | { |
| 2835 | return -1; |
| 2836 | } |
| 2837 | #endif |