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annotate packages/kernel/current/src/debug/dbg_gdb.cxx @ 208:e0c0827131d1 ecos
Merge from eCos master repository on 2002-05-20-20:11:54-BST
| author | jlarmour |
|---|---|
| date | Mon, 20 May 2002 22:19:26 +0000 |
| parents | b939e9cada46 |
| children | d2c90368aeef |
| rev | line source |
|---|---|
| 0 | 1 /*========================================================================== |
| 2 // | |
| 2 | 3 // dbg_gdb.c |
| 0 | 4 // |
| 2 | 5 // GDB Debugging Interface |
| 0 | 6 // |
| 7 //========================================================================== | |
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8 //####ECOSGPLCOPYRIGHTBEGIN#### |
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9 // ------------------------------------------- |
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10 // This file is part of eCos, the Embedded Configurable Operating System. |
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. |
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12 // |
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13 // eCos is free software; you can redistribute it and/or modify it under |
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14 // the terms of the GNU General Public License as published by the Free |
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15 // Software Foundation; either version 2 or (at your option) any later version. |
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16 // |
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY |
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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20 // for more details. |
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21 // |
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22 // You should have received a copy of the GNU General Public License along |
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23 // with eCos; if not, write to the Free Software Foundation, Inc., |
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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25 // |
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26 // As a special exception, if other files instantiate templates or use macros |
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27 // or inline functions from this file, or you compile this file and link it |
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28 // with other works to produce a work based on this file, this file does not |
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29 // by itself cause the resulting work to be covered by the GNU General Public |
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30 // License. However the source code for this file must still be made available |
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31 // in accordance with section (3) of the GNU General Public License. |
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32 // |
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33 // This exception does not invalidate any other reasons why a work based on |
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34 // this file might be covered by the GNU General Public License. |
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35 // |
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. |
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37 // at http://sources.redhat.com/ecos/ecos-license |
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38 // ------------------------------------------- |
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39 //####ECOSGPLCOPYRIGHTEND#### |
| 0 | 40 //========================================================================== |
| 41 //#####DESCRIPTIONBEGIN#### | |
| 42 // | |
| 2 | 43 // Author(s): nickg |
| 44 // Contributors: nickg | |
| 45 // Date: 1998-08-22 | |
| 0 | 46 // Purpose: GDB Debugging Interface |
| 2 | 47 // Description: Interface for calls from GDB stubs into the OS. These |
| 0 | 48 // currently mostly support thread awareness. |
| 49 // | |
| 50 //####DESCRIPTIONEND#### | |
| 51 // | |
| 52 //========================================================================*/ | |
| 53 | |
| 54 #include <pkgconf/kernel.h> | |
| 55 #include <pkgconf/hal.h> // CYG_HAL_USE_ROM_MONITOR_CYGMON | |
| 56 | |
| 57 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 58 | |
| 59 #include <cyg/kernel/ktypes.h> | |
| 60 | |
| 61 #include <cyg/kernel/thread.hxx> | |
| 62 #include <cyg/kernel/sched.hxx> | |
| 63 | |
| 64 #include <cyg/kernel/thread.inl> | |
| 65 #include <cyg/kernel/sched.inl> | |
| 66 | |
| 67 #include <cyg/hal/hal_arch.h> | |
| 68 #include <cyg/hal/hal_stub.h> | |
| 69 | |
| 70 extern "C" | |
| 71 { | |
| 72 #include <cyg/hal/dbg-threads-api.h> | |
| 73 }; | |
| 74 | |
| 75 #define USE_ID 1 | |
| 76 | |
| 77 #if (CYG_BYTEORDER == CYG_LSBFIRST) | |
| 78 | |
| 79 unsigned long swap32(unsigned long x) | |
| 80 { | |
| 81 unsigned long r = 0; | |
| 82 | |
| 83 r |= (x>>24)&0xFF; | |
| 84 r |= ((x>>16)&0xFF)<<8; | |
| 85 r |= ((x>>8)&0xFF)<<16; | |
| 86 r |= ((x)&0xFF)<<24; | |
| 87 | |
| 88 return r; | |
| 89 } | |
| 90 | |
| 91 #else | |
| 92 | |
| 93 #define swap32(x) ((unsigned long)(x)) | |
| 94 | |
| 95 #endif | |
| 96 | |
| 97 //-------------------------------------------------------------------------- | |
| 98 | |
| 99 externC int dbg_thread_capabilities(struct dbg_capabilities * cpb) | |
| 100 { | |
| 101 cpb->mask1 = has_thread_current | | |
| 102 has_thread_registers | | |
| 103 has_thread_reg_change | | |
| 104 has_thread_list | | |
| 105 has_thread_info ; | |
| 106 return 1 ; | |
| 107 } | |
| 108 | |
| 109 //-------------------------------------------------------------------------- | |
| 110 | |
| 111 static void dbg_make_threadref(Cyg_Thread *thread, threadref *ref ) | |
| 112 { | |
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113 // The following test tries to avoid accessing uninitialized pointers. |
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114 // This can happen if we take a breakpoint before the data is copied |
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115 // or the BSS zeroed. We currently assume that RAM will reset to zero |
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116 // or 0xff. If it is random, we have no hope. |
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117 |
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118 if( (CYG_ADDRWORD)thread == 0 || (CYG_ADDRWORD)thread == 0xffffffff ) |
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119 { |
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120 ((unsigned long *)ref)[0] = 0; |
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121 ((unsigned long *)ref)[1] = 0; |
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122 } |
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123 else |
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124 { |
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125 cyg_uint16 id = thread->get_unique_id(); |
| 0 | 126 |
| 127 #if USE_ID | |
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128 ((unsigned long *)ref)[0] = (unsigned long)thread; |
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129 ((unsigned long *)ref)[1] = (unsigned long)swap32(id); |
| 0 | 130 #else |
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131 ((unsigned long *)ref)[1] = (unsigned long)thread; |
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132 ((unsigned long *)ref)[0] = (unsigned long)id; |
| 0 | 133 #endif |
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134 } |
| 0 | 135 } |
| 136 | |
| 137 static Cyg_Thread *dbg_get_thread( threadref *ref) | |
| 138 { | |
| 139 #if USE_ID | |
| 140 | |
| 141 cyg_uint16 id = 0; | |
| 142 | |
| 143 id = (cyg_uint16)swap32(((unsigned long *)ref)[1]); | |
| 144 | |
| 145 Cyg_Thread *th = Cyg_Thread::get_list_head(); | |
| 146 while( th != 0 ) | |
| 147 { | |
| 148 if( th->get_unique_id() == id ) break; | |
| 149 th = th->get_list_next(); | |
| 150 } | |
| 151 | |
| 152 // if( thread->get_unique_id() != id ) th = 0; | |
| 153 | |
| 154 #else | |
| 155 | |
| 156 cyg_uint16 id = 0; | |
| 157 | |
| 158 Cyg_Thread *thread = (Cyg_Thread *)(((unsigned long *)ref)[1]); | |
| 159 id = (cyg_uint16)(((unsigned long *)ref)[0]); | |
| 160 | |
| 161 // Validate the thread. | |
| 162 Cyg_Thread *th = Cyg_Thread::get_list_head(); | |
| 163 while( th != 0 ) | |
| 164 { | |
| 165 if( th == thread ) break; | |
| 166 th = th->get_list_next(); | |
| 167 } | |
| 168 | |
| 169 // if( thread->get_unique_id() != id ) th = 0; | |
| 170 | |
| 171 #endif | |
| 172 | |
| 173 return th; | |
| 174 } | |
| 175 | |
| 176 //-------------------------------------------------------------------------- | |
| 177 | |
| 178 externC int dbg_currthread(threadref * varparm) | |
| 179 { | |
| 180 Cyg_Thread *thread = Cyg_Scheduler::get_current_thread(); | |
| 181 | |
| 182 dbg_make_threadref(thread, varparm ); | |
| 183 | |
| 184 return 1 ; | |
| 185 } | |
| 186 | |
| 187 //-------------------------------------------------------------------------- | |
| 188 | |
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189 externC int dbg_thread_id(threadref *threadid) |
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190 { |
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191 Cyg_Thread *thread = dbg_get_thread(threadid); |
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192 if( thread == 0 ) return 0; |
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193 return thread->get_unique_id (); |
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194 } |
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195 |
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196 //-------------------------------------------------------------------------- |
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197 |
| 0 | 198 externC int dbg_currthread_id(void) |
| 199 { | |
| 200 Cyg_Thread *thread = Cyg_Scheduler::get_current_thread(); | |
| 201 return thread->get_unique_id (); | |
| 202 } | |
| 203 | |
| 204 //-------------------------------------------------------------------------- | |
| 205 | |
| 206 externC int dbg_threadlist(int startflag, | |
| 2 | 207 threadref * lastthreadid, |
| 208 threadref * next_thread) | |
| 0 | 209 { |
| 210 Cyg_Thread *thread; | |
| 211 if( startflag ) | |
| 212 { | |
| 213 thread = Cyg_Thread::get_list_head(); | |
| 214 dbg_make_threadref(thread, next_thread); | |
| 215 } | |
| 216 else | |
| 217 { | |
| 218 thread = dbg_get_thread(lastthreadid); | |
| 219 | |
| 220 if( thread == 0 ) return 0; | |
| 221 thread = thread->get_list_next(); | |
| 222 | |
| 223 if( thread == 0 ) return 0; | |
| 224 dbg_make_threadref(thread, next_thread); | |
| 225 } | |
| 226 return 1 ; | |
| 227 } | |
| 228 | |
| 229 //-------------------------------------------------------------------------- | |
| 230 // Some support routines for manufacturing thread info strings | |
| 231 | |
| 232 static char *dbg_addstr(char *s, char *t) | |
| 233 { | |
| 234 while( (*s++ = *t++) != 0 ); | |
| 235 | |
| 236 return s-1; | |
| 237 } | |
| 238 | |
| 239 static char *dbg_addint(char *s, int n, int base) | |
| 240 { | |
| 241 char buf[16]; | |
| 242 char sign = '+'; | |
| 243 cyg_count8 bpos; | |
| 244 char *digits = "0123456789ABCDEF"; | |
| 245 | |
| 246 if( n < 0 ) n = -n, sign = '-'; | |
| 247 | |
| 248 /* Set pos to start */ | |
| 249 bpos = 0; | |
| 250 | |
| 251 /* construct digits into buffer in reverse order */ | |
| 252 if( n == 0 ) buf[bpos++] = '0'; | |
| 253 else while( n != 0 ) | |
| 254 { | |
| 255 cyg_ucount8 d = n % base; | |
| 256 buf[bpos++] = digits[d]; | |
| 257 n /= base; | |
| 258 } | |
| 259 | |
| 260 /* set sign if negative. */ | |
| 261 if( sign == '-' ) | |
| 262 { | |
| 263 buf[bpos] = sign; | |
| 264 } | |
| 265 else bpos--; | |
| 266 | |
| 267 /* Now write it out in correct order. */ | |
| 268 while( bpos >= 0 ) | |
| 269 *s++ = buf[bpos--]; | |
| 270 | |
| 271 *s = 0; | |
| 272 | |
| 273 return s; | |
| 274 } | |
| 275 | |
| 276 static char *dbg_adddec(char *s, int x) | |
| 277 { | |
| 278 return dbg_addint(s, x, 10); | |
| 279 } | |
| 280 | |
| 281 //-------------------------------------------------------------------------- | |
| 282 | |
| 283 externC int dbg_threadinfo( | |
| 2 | 284 threadref * threadid, |
| 285 struct cygmon_thread_debug_info * info) | |
| 0 | 286 { |
| 287 static char statebuf[60]; | |
| 288 | |
| 289 Cyg_Thread *thread = dbg_get_thread(threadid); | |
| 290 if( thread == 0 ) return 0; | |
| 291 | |
| 292 info->context_exists = 1; | |
| 293 | |
| 294 char *sbp = statebuf; | |
| 295 char *s; | |
| 296 | |
| 297 if( thread->get_state() & Cyg_Thread::SUSPENDED ) | |
| 298 { | |
| 299 sbp = dbg_addstr( sbp, "suspended+"); | |
| 300 } | |
| 301 | |
| 302 switch( thread->get_state() & ~Cyg_Thread::SUSPENDED ) | |
| 303 { | |
| 304 case Cyg_Thread::RUNNING: | |
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305 if ( Cyg_Scheduler::get_current_thread() == thread ) { |
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306 s = "running"; break; |
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307 } |
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308 else if ( thread->get_state() & Cyg_Thread::SUSPENDED ) { |
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309 s = ""; sbp--; /*kill '+'*/ break; |
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310 } |
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311 else { |
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312 s = "ready"; break; |
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313 } |
| 0 | 314 case Cyg_Thread::SLEEPING: |
| 315 s = "sleeping"; break; | |
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316 case Cyg_Thread::COUNTSLEEP | Cyg_Thread::SLEEPING: |
| 0 | 317 case Cyg_Thread::COUNTSLEEP: |
| 318 s = "counted sleep"; break; | |
| 319 case Cyg_Thread::CREATING: | |
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320 s = "creating"; sbp = statebuf; break; |
| 0 | 321 case Cyg_Thread::EXITED: |
|
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01ce82f3e11a
Merge from eCos master repository on 1999-06-11-17:05:41-BST
jlarmour
parents:
10
diff
changeset
|
322 s = "exited"; sbp = statebuf; break; |
| 0 | 323 default: |
| 324 s = "unknown state"; break; | |
| 325 } | |
| 326 | |
| 327 sbp = dbg_addstr( sbp, s ); | |
| 328 sbp = dbg_addstr( sbp, ", Priority: " ); | |
| 329 sbp = dbg_adddec( sbp, thread->get_priority() ); | |
| 330 | |
| 331 info->thread_display = statebuf; | |
| 332 | |
| 333 #ifdef CYGVAR_KERNEL_THREADS_NAME | |
| 334 info->unique_thread_name = thread->get_name(); | |
| 335 #else | |
| 336 info->unique_thread_name = 0; | |
| 337 #endif | |
| 338 | |
| 339 info->more_display = 0; | |
| 340 | |
| 341 return 1 ; | |
| 342 } | |
| 343 | |
| 344 //-------------------------------------------------------------------------- | |
| 345 | |
| 346 externC int dbg_getthreadreg( | |
| 2 | 347 threadref * osthreadid, |
| 348 int regcount, /* count of registers in the array */ | |
| 349 void * regval) /* fillin this array */ | |
| 0 | 350 { |
| 351 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 352 | |
| 353 if( thread == 0 ) return 0; | |
| 354 | |
| 355 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 356 { | |
| 357 #if defined(CYG_HAL_USE_ROM_MONITOR_CYGMON) | |
| 358 // We have no state for the current thread, Cygmon has | |
| 359 // got that and we cannot get at it. | |
| 360 return 0; | |
| 361 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) | |
| 2 | 362 // registers hold the state of the current thread. |
| 363 __stub_copy_registers ((target_register_t *)regval, registers); | |
| 0 | 364 #else |
| 365 return 0; | |
| 366 #endif | |
| 367 } | |
| 368 else | |
| 369 { | |
| 370 HAL_SavedRegisters *regs = thread->get_saved_context(); | |
| 371 if( regs == 0 ) return 0; | |
| 372 | |
| 373 HAL_GET_GDB_REGISTERS (regval, regs); | |
| 374 } | |
| 375 | |
| 376 return 1 ; | |
| 377 } | |
| 378 | |
| 379 //-------------------------------------------------------------------------- | |
| 2 | 380 |
| 0 | 381 externC int dbg_setthreadreg( |
| 2 | 382 threadref * osthreadid, |
| 383 int regcount , /* number of registers */ | |
| 384 void * regval) | |
| 0 | 385 { |
| 386 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 387 | |
| 388 if( thread == 0 ) return 0; | |
| 389 | |
| 390 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 391 { | |
| 392 #if defined(CYG_HAL_USE_ROM_MONITOR_CYGMON) | |
| 393 // We have no state for the current thread, Cygmon has | |
| 394 // got that and we cannot get at it. | |
| 395 return 0; | |
| 396 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) | |
| 2 | 397 // registers hold the state of the current thread. |
| 398 __stub_copy_registers (registers, (target_register_t *)regval); | |
| 0 | 399 #else |
| 400 return 0; | |
| 401 #endif | |
| 402 } | |
| 403 else | |
| 404 { | |
| 405 HAL_SavedRegisters *regs = thread->get_saved_context(); | |
| 406 if( regs == 0 ) return 0; | |
| 407 | |
| 408 HAL_SET_GDB_REGISTERS (regs, regval); | |
| 409 } | |
| 410 | |
| 411 return 1; | |
| 412 } | |
| 413 | |
| 2 | 414 //-------------------------------------------------------------------------- |
| 415 // Thread scheduler control for debugger. | |
| 416 // Arguments: | |
| 417 // osthreadid : must match currently executing thread. | |
| 418 // Future use: change the currently executing thread. | |
| 419 // lock : 0 == unlock scheduler, 1 == lock scheduler | |
| 420 // mode : 0 == single-instruction step, 1 == free running | |
| 421 // | |
| 422 // Return values: | |
| 423 // 1 == success | |
| 424 // 0 == failure | |
| 425 // -1 == request that the caller handle this itself | |
| 426 // (eg.by disabling interrupts) | |
| 427 // | |
| 428 | |
| 429 externC int dbg_scheduler( | |
| 430 threadref * osthreadid, | |
| 431 int lock, /* 0 == unlock, 1 == lock */ | |
| 432 int mode) /* 0 == step, 1 == continue */ | |
| 433 { | |
| 434 #if 0 | |
| 435 /* Minimal implementation: let stub do the work. */ | |
| 436 return -1; // Stub will disable interrupts | |
| 437 #else | |
| 438 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 439 | |
| 440 if( thread == 0 ) return 0; // fail | |
| 441 | |
| 442 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 443 { | |
| 444 // OK to proceed | |
| 445 | |
| 446 if (lock) | |
| 447 { | |
| 448 Cyg_Scheduler::lock(); | |
| 449 } | |
| 450 else | |
| 451 { | |
| 452 if (Cyg_Scheduler::get_sched_lock() >= 1) | |
| 453 Cyg_Scheduler::unlock_simple(); | |
| 454 } | |
| 455 return 1; // success | |
| 456 } | |
| 457 else | |
| 458 { | |
| 459 // Cannot accept any thread other than current one | |
| 460 return 0; // fail | |
| 461 } | |
| 462 #endif | |
| 463 } | |
| 464 | |
| 465 | |
| 0 | 466 #endif // CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT |
| 467 | |
| 468 //-------------------------------------------------------------------------- | |
| 469 // End of dbg_gdb.cxx |