Mercurial > ecos
annotate packages/kernel/current/src/debug/dbg_gdb.cxx @ 156:b939e9cada46
Merge from eCos master repository on 2001-03-29-21:44:39-BST
| author | jlarmour |
|---|---|
| date | Fri, 06 Apr 2001 17:20:13 +0000 |
| parents | bf00f99aec69 |
| children | e0c0827131d1 |
| rev | line source |
|---|---|
| 0 | 1 /*========================================================================== |
| 2 // | |
| 2 | 3 // dbg_gdb.c |
| 0 | 4 // |
| 2 | 5 // GDB Debugging Interface |
| 0 | 6 // |
| 7 //========================================================================== | |
| 8 //####COPYRIGHTBEGIN#### | |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Red Hat eCos Public License |
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12 // Version 1.1 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://www.redhat.com/ |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Configurable Operating System, |
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22 // released September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Red Hat. |
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25 // Portions created by Red Hat are |
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. |
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27 // All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
| 0 | 30 //####COPYRIGHTEND#### |
| 31 //========================================================================== | |
| 32 //#####DESCRIPTIONBEGIN#### | |
| 33 // | |
| 2 | 34 // Author(s): nickg |
| 35 // Contributors: nickg | |
| 36 // Date: 1998-08-22 | |
| 0 | 37 // Purpose: GDB Debugging Interface |
| 2 | 38 // Description: Interface for calls from GDB stubs into the OS. These |
| 0 | 39 // currently mostly support thread awareness. |
| 40 // | |
| 41 //####DESCRIPTIONEND#### | |
| 42 // | |
| 43 //========================================================================*/ | |
| 44 | |
| 45 #include <pkgconf/kernel.h> | |
| 46 #include <pkgconf/hal.h> // CYG_HAL_USE_ROM_MONITOR_CYGMON | |
| 47 | |
| 48 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 49 | |
| 50 #include <cyg/kernel/ktypes.h> | |
| 51 | |
| 52 #include <cyg/kernel/thread.hxx> | |
| 53 #include <cyg/kernel/sched.hxx> | |
| 54 | |
| 55 #include <cyg/kernel/thread.inl> | |
| 56 #include <cyg/kernel/sched.inl> | |
| 57 | |
| 58 #include <cyg/hal/hal_arch.h> | |
| 59 #include <cyg/hal/hal_stub.h> | |
| 60 | |
| 61 extern "C" | |
| 62 { | |
| 63 #include <cyg/hal/dbg-threads-api.h> | |
| 64 }; | |
| 65 | |
| 66 #define USE_ID 1 | |
| 67 | |
| 68 #if (CYG_BYTEORDER == CYG_LSBFIRST) | |
| 69 | |
| 70 unsigned long swap32(unsigned long x) | |
| 71 { | |
| 72 unsigned long r = 0; | |
| 73 | |
| 74 r |= (x>>24)&0xFF; | |
| 75 r |= ((x>>16)&0xFF)<<8; | |
| 76 r |= ((x>>8)&0xFF)<<16; | |
| 77 r |= ((x)&0xFF)<<24; | |
| 78 | |
| 79 return r; | |
| 80 } | |
| 81 | |
| 82 #else | |
| 83 | |
| 84 #define swap32(x) ((unsigned long)(x)) | |
| 85 | |
| 86 #endif | |
| 87 | |
| 88 //-------------------------------------------------------------------------- | |
| 89 | |
| 90 externC int dbg_thread_capabilities(struct dbg_capabilities * cpb) | |
| 91 { | |
| 92 cpb->mask1 = has_thread_current | | |
| 93 has_thread_registers | | |
| 94 has_thread_reg_change | | |
| 95 has_thread_list | | |
| 96 has_thread_info ; | |
| 97 return 1 ; | |
| 98 } | |
| 99 | |
| 100 //-------------------------------------------------------------------------- | |
| 101 | |
| 102 static void dbg_make_threadref(Cyg_Thread *thread, threadref *ref ) | |
| 103 { | |
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104 // The following test tries to avoid accessing uninitialized pointers. |
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105 // This can happen if we take a breakpoint before the data is copied |
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106 // or the BSS zeroed. We currently assume that RAM will reset to zero |
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107 // or 0xff. If it is random, we have no hope. |
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108 |
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109 if( (CYG_ADDRWORD)thread == 0 || (CYG_ADDRWORD)thread == 0xffffffff ) |
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110 { |
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111 ((unsigned long *)ref)[0] = 0; |
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112 ((unsigned long *)ref)[1] = 0; |
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113 } |
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114 else |
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115 { |
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116 cyg_uint16 id = thread->get_unique_id(); |
| 0 | 117 |
| 118 #if USE_ID | |
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119 ((unsigned long *)ref)[0] = (unsigned long)thread; |
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120 ((unsigned long *)ref)[1] = (unsigned long)swap32(id); |
| 0 | 121 #else |
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122 ((unsigned long *)ref)[1] = (unsigned long)thread; |
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123 ((unsigned long *)ref)[0] = (unsigned long)id; |
| 0 | 124 #endif |
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125 } |
| 0 | 126 } |
| 127 | |
| 128 static Cyg_Thread *dbg_get_thread( threadref *ref) | |
| 129 { | |
| 130 #if USE_ID | |
| 131 | |
| 132 cyg_uint16 id = 0; | |
| 133 | |
| 134 id = (cyg_uint16)swap32(((unsigned long *)ref)[1]); | |
| 135 | |
| 136 Cyg_Thread *th = Cyg_Thread::get_list_head(); | |
| 137 while( th != 0 ) | |
| 138 { | |
| 139 if( th->get_unique_id() == id ) break; | |
| 140 th = th->get_list_next(); | |
| 141 } | |
| 142 | |
| 143 // if( thread->get_unique_id() != id ) th = 0; | |
| 144 | |
| 145 #else | |
| 146 | |
| 147 cyg_uint16 id = 0; | |
| 148 | |
| 149 Cyg_Thread *thread = (Cyg_Thread *)(((unsigned long *)ref)[1]); | |
| 150 id = (cyg_uint16)(((unsigned long *)ref)[0]); | |
| 151 | |
| 152 // Validate the thread. | |
| 153 Cyg_Thread *th = Cyg_Thread::get_list_head(); | |
| 154 while( th != 0 ) | |
| 155 { | |
| 156 if( th == thread ) break; | |
| 157 th = th->get_list_next(); | |
| 158 } | |
| 159 | |
| 160 // if( thread->get_unique_id() != id ) th = 0; | |
| 161 | |
| 162 #endif | |
| 163 | |
| 164 return th; | |
| 165 } | |
| 166 | |
| 167 //-------------------------------------------------------------------------- | |
| 168 | |
| 169 externC int dbg_currthread(threadref * varparm) | |
| 170 { | |
| 171 Cyg_Thread *thread = Cyg_Scheduler::get_current_thread(); | |
| 172 | |
| 173 dbg_make_threadref(thread, varparm ); | |
| 174 | |
| 175 return 1 ; | |
| 176 } | |
| 177 | |
| 178 //-------------------------------------------------------------------------- | |
| 179 | |
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180 externC int dbg_thread_id(threadref *threadid) |
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181 { |
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182 Cyg_Thread *thread = dbg_get_thread(threadid); |
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183 if( thread == 0 ) return 0; |
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184 return thread->get_unique_id (); |
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185 } |
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186 |
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187 //-------------------------------------------------------------------------- |
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188 |
| 0 | 189 externC int dbg_currthread_id(void) |
| 190 { | |
| 191 Cyg_Thread *thread = Cyg_Scheduler::get_current_thread(); | |
| 192 return thread->get_unique_id (); | |
| 193 } | |
| 194 | |
| 195 //-------------------------------------------------------------------------- | |
| 196 | |
| 197 externC int dbg_threadlist(int startflag, | |
| 2 | 198 threadref * lastthreadid, |
| 199 threadref * next_thread) | |
| 0 | 200 { |
| 201 Cyg_Thread *thread; | |
| 202 if( startflag ) | |
| 203 { | |
| 204 thread = Cyg_Thread::get_list_head(); | |
| 205 dbg_make_threadref(thread, next_thread); | |
| 206 } | |
| 207 else | |
| 208 { | |
| 209 thread = dbg_get_thread(lastthreadid); | |
| 210 | |
| 211 if( thread == 0 ) return 0; | |
| 212 thread = thread->get_list_next(); | |
| 213 | |
| 214 if( thread == 0 ) return 0; | |
| 215 dbg_make_threadref(thread, next_thread); | |
| 216 } | |
| 217 return 1 ; | |
| 218 } | |
| 219 | |
| 220 //-------------------------------------------------------------------------- | |
| 221 // Some support routines for manufacturing thread info strings | |
| 222 | |
| 223 static char *dbg_addstr(char *s, char *t) | |
| 224 { | |
| 225 while( (*s++ = *t++) != 0 ); | |
| 226 | |
| 227 return s-1; | |
| 228 } | |
| 229 | |
| 230 static char *dbg_addint(char *s, int n, int base) | |
| 231 { | |
| 232 char buf[16]; | |
| 233 char sign = '+'; | |
| 234 cyg_count8 bpos; | |
| 235 char *digits = "0123456789ABCDEF"; | |
| 236 | |
| 237 if( n < 0 ) n = -n, sign = '-'; | |
| 238 | |
| 239 /* Set pos to start */ | |
| 240 bpos = 0; | |
| 241 | |
| 242 /* construct digits into buffer in reverse order */ | |
| 243 if( n == 0 ) buf[bpos++] = '0'; | |
| 244 else while( n != 0 ) | |
| 245 { | |
| 246 cyg_ucount8 d = n % base; | |
| 247 buf[bpos++] = digits[d]; | |
| 248 n /= base; | |
| 249 } | |
| 250 | |
| 251 /* set sign if negative. */ | |
| 252 if( sign == '-' ) | |
| 253 { | |
| 254 buf[bpos] = sign; | |
| 255 } | |
| 256 else bpos--; | |
| 257 | |
| 258 /* Now write it out in correct order. */ | |
| 259 while( bpos >= 0 ) | |
| 260 *s++ = buf[bpos--]; | |
| 261 | |
| 262 *s = 0; | |
| 263 | |
| 264 return s; | |
| 265 } | |
| 266 | |
| 267 static char *dbg_adddec(char *s, int x) | |
| 268 { | |
| 269 return dbg_addint(s, x, 10); | |
| 270 } | |
| 271 | |
| 272 //-------------------------------------------------------------------------- | |
| 273 | |
| 274 externC int dbg_threadinfo( | |
| 2 | 275 threadref * threadid, |
| 276 struct cygmon_thread_debug_info * info) | |
| 0 | 277 { |
| 278 static char statebuf[60]; | |
| 279 | |
| 280 Cyg_Thread *thread = dbg_get_thread(threadid); | |
| 281 if( thread == 0 ) return 0; | |
| 282 | |
| 283 info->context_exists = 1; | |
| 284 | |
| 285 char *sbp = statebuf; | |
| 286 char *s; | |
| 287 | |
| 288 if( thread->get_state() & Cyg_Thread::SUSPENDED ) | |
| 289 { | |
| 290 sbp = dbg_addstr( sbp, "suspended+"); | |
| 291 } | |
| 292 | |
| 293 switch( thread->get_state() & ~Cyg_Thread::SUSPENDED ) | |
| 294 { | |
| 295 case Cyg_Thread::RUNNING: | |
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296 if ( Cyg_Scheduler::get_current_thread() == thread ) { |
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297 s = "running"; break; |
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298 } |
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299 else if ( thread->get_state() & Cyg_Thread::SUSPENDED ) { |
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300 s = ""; sbp--; /*kill '+'*/ break; |
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301 } |
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302 else { |
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303 s = "ready"; break; |
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304 } |
| 0 | 305 case Cyg_Thread::SLEEPING: |
| 306 s = "sleeping"; break; | |
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307 case Cyg_Thread::COUNTSLEEP | Cyg_Thread::SLEEPING: |
| 0 | 308 case Cyg_Thread::COUNTSLEEP: |
| 309 s = "counted sleep"; break; | |
| 310 case Cyg_Thread::CREATING: | |
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311 s = "creating"; sbp = statebuf; break; |
| 0 | 312 case Cyg_Thread::EXITED: |
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313 s = "exited"; sbp = statebuf; break; |
| 0 | 314 default: |
| 315 s = "unknown state"; break; | |
| 316 } | |
| 317 | |
| 318 sbp = dbg_addstr( sbp, s ); | |
| 319 sbp = dbg_addstr( sbp, ", Priority: " ); | |
| 320 sbp = dbg_adddec( sbp, thread->get_priority() ); | |
| 321 | |
| 322 info->thread_display = statebuf; | |
| 323 | |
| 324 #ifdef CYGVAR_KERNEL_THREADS_NAME | |
| 325 info->unique_thread_name = thread->get_name(); | |
| 326 #else | |
| 327 info->unique_thread_name = 0; | |
| 328 #endif | |
| 329 | |
| 330 info->more_display = 0; | |
| 331 | |
| 332 return 1 ; | |
| 333 } | |
| 334 | |
| 335 //-------------------------------------------------------------------------- | |
| 336 | |
| 337 externC int dbg_getthreadreg( | |
| 2 | 338 threadref * osthreadid, |
| 339 int regcount, /* count of registers in the array */ | |
| 340 void * regval) /* fillin this array */ | |
| 0 | 341 { |
| 342 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 343 | |
| 344 if( thread == 0 ) return 0; | |
| 345 | |
| 346 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 347 { | |
| 348 #if defined(CYG_HAL_USE_ROM_MONITOR_CYGMON) | |
| 349 // We have no state for the current thread, Cygmon has | |
| 350 // got that and we cannot get at it. | |
| 351 return 0; | |
| 352 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) | |
| 2 | 353 // registers hold the state of the current thread. |
| 354 __stub_copy_registers ((target_register_t *)regval, registers); | |
| 0 | 355 #else |
| 356 return 0; | |
| 357 #endif | |
| 358 } | |
| 359 else | |
| 360 { | |
| 361 HAL_SavedRegisters *regs = thread->get_saved_context(); | |
| 362 if( regs == 0 ) return 0; | |
| 363 | |
| 364 HAL_GET_GDB_REGISTERS (regval, regs); | |
| 365 } | |
| 366 | |
| 367 return 1 ; | |
| 368 } | |
| 369 | |
| 370 //-------------------------------------------------------------------------- | |
| 2 | 371 |
| 0 | 372 externC int dbg_setthreadreg( |
| 2 | 373 threadref * osthreadid, |
| 374 int regcount , /* number of registers */ | |
| 375 void * regval) | |
| 0 | 376 { |
| 377 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 378 | |
| 379 if( thread == 0 ) return 0; | |
| 380 | |
| 381 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 382 { | |
| 383 #if defined(CYG_HAL_USE_ROM_MONITOR_CYGMON) | |
| 384 // We have no state for the current thread, Cygmon has | |
| 385 // got that and we cannot get at it. | |
| 386 return 0; | |
| 387 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) | |
| 2 | 388 // registers hold the state of the current thread. |
| 389 __stub_copy_registers (registers, (target_register_t *)regval); | |
| 0 | 390 #else |
| 391 return 0; | |
| 392 #endif | |
| 393 } | |
| 394 else | |
| 395 { | |
| 396 HAL_SavedRegisters *regs = thread->get_saved_context(); | |
| 397 if( regs == 0 ) return 0; | |
| 398 | |
| 399 HAL_SET_GDB_REGISTERS (regs, regval); | |
| 400 } | |
| 401 | |
| 402 return 1; | |
| 403 } | |
| 404 | |
| 2 | 405 //-------------------------------------------------------------------------- |
| 406 // Thread scheduler control for debugger. | |
| 407 // Arguments: | |
| 408 // osthreadid : must match currently executing thread. | |
| 409 // Future use: change the currently executing thread. | |
| 410 // lock : 0 == unlock scheduler, 1 == lock scheduler | |
| 411 // mode : 0 == single-instruction step, 1 == free running | |
| 412 // | |
| 413 // Return values: | |
| 414 // 1 == success | |
| 415 // 0 == failure | |
| 416 // -1 == request that the caller handle this itself | |
| 417 // (eg.by disabling interrupts) | |
| 418 // | |
| 419 | |
| 420 externC int dbg_scheduler( | |
| 421 threadref * osthreadid, | |
| 422 int lock, /* 0 == unlock, 1 == lock */ | |
| 423 int mode) /* 0 == step, 1 == continue */ | |
| 424 { | |
| 425 #if 0 | |
| 426 /* Minimal implementation: let stub do the work. */ | |
| 427 return -1; // Stub will disable interrupts | |
| 428 #else | |
| 429 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 430 | |
| 431 if( thread == 0 ) return 0; // fail | |
| 432 | |
| 433 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 434 { | |
| 435 // OK to proceed | |
| 436 | |
| 437 if (lock) | |
| 438 { | |
| 439 Cyg_Scheduler::lock(); | |
| 440 } | |
| 441 else | |
| 442 { | |
| 443 if (Cyg_Scheduler::get_sched_lock() >= 1) | |
| 444 Cyg_Scheduler::unlock_simple(); | |
| 445 } | |
| 446 return 1; // success | |
| 447 } | |
| 448 else | |
| 449 { | |
| 450 // Cannot accept any thread other than current one | |
| 451 return 0; // fail | |
| 452 } | |
| 453 #endif | |
| 454 } | |
| 455 | |
| 456 | |
| 0 | 457 #endif // CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT |
| 458 | |
| 459 //-------------------------------------------------------------------------- | |
| 460 // End of dbg_gdb.cxx |