Mercurial > ecos
annotate packages/kernel/current/src/debug/dbg_gdb.cxx @ 3292:7f8e529b4d82 default tip
Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
| author | vae |
|---|---|
| date | Wed, 29 Apr 2015 23:31:48 +0000 |
| parents | 74dbf4c3f2e1 |
| children |
| 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 Free Software Foundation, 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 |
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16 // version. |
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17 // |
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT |
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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21 // for more details. |
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22 // |
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23 // You should have received a copy of the GNU General Public License |
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24 // along with eCos; if not, write to the Free Software Foundation, Inc., |
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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26 // |
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27 // As a special exception, if other files instantiate templates or use |
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28 // macros or inline functions from this file, or you compile this file |
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29 // and link it with other works to produce a work based on this file, |
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30 // this file does not by itself cause the resulting work to be covered by |
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31 // the GNU General Public License. However the source code for this file |
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32 // must still be made available in accordance with section (3) of the GNU |
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33 // General Public License v2. |
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34 // |
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35 // This exception does not invalidate any other reasons why a work based |
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36 // on this file might be covered by the GNU General Public License. |
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37 // ------------------------------------------- |
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38 // ####ECOSGPLCOPYRIGHTEND#### |
| 0 | 39 //========================================================================== |
| 40 //#####DESCRIPTIONBEGIN#### | |
| 41 // | |
| 2 | 42 // Author(s): nickg |
| 43 // Contributors: nickg | |
| 44 // Date: 1998-08-22 | |
| 0 | 45 // Purpose: GDB Debugging Interface |
| 2 | 46 // Description: Interface for calls from GDB stubs into the OS. These |
| 0 | 47 // currently mostly support thread awareness. |
| 48 // | |
| 49 //####DESCRIPTIONEND#### | |
| 50 // | |
| 51 //========================================================================*/ | |
| 52 | |
| 53 #include <pkgconf/kernel.h> | |
| 54 #include <pkgconf/hal.h> // CYG_HAL_USE_ROM_MONITOR_CYGMON | |
| 55 | |
| 56 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 57 | |
| 58 #include <cyg/kernel/ktypes.h> | |
| 59 | |
| 60 #include <cyg/kernel/thread.hxx> | |
| 61 #include <cyg/kernel/sched.hxx> | |
| 62 | |
| 63 #include <cyg/kernel/thread.inl> | |
| 64 #include <cyg/kernel/sched.inl> | |
| 65 | |
| 66 #include <cyg/hal/hal_arch.h> | |
| 67 #include <cyg/hal/hal_stub.h> | |
| 68 | |
| 69 extern "C" | |
| 70 { | |
| 71 #include <cyg/hal/dbg-threads-api.h> | |
| 72 }; | |
| 73 | |
| 74 #define USE_ID 1 | |
| 75 | |
| 76 #if (CYG_BYTEORDER == CYG_LSBFIRST) | |
| 77 | |
| 78 unsigned long swap32(unsigned long x) | |
| 79 { | |
| 80 unsigned long r = 0; | |
| 81 | |
| 82 r |= (x>>24)&0xFF; | |
| 83 r |= ((x>>16)&0xFF)<<8; | |
| 84 r |= ((x>>8)&0xFF)<<16; | |
| 85 r |= ((x)&0xFF)<<24; | |
| 86 | |
| 87 return r; | |
| 88 } | |
| 89 | |
| 90 #else | |
| 91 | |
| 92 #define swap32(x) ((unsigned long)(x)) | |
| 93 | |
| 94 #endif | |
| 95 | |
| 96 //-------------------------------------------------------------------------- | |
| 97 | |
| 98 externC int dbg_thread_capabilities(struct dbg_capabilities * cpb) | |
| 99 { | |
| 100 cpb->mask1 = has_thread_current | | |
| 101 has_thread_registers | | |
| 102 has_thread_reg_change | | |
| 103 has_thread_list | | |
| 104 has_thread_info ; | |
| 105 return 1 ; | |
| 106 } | |
| 107 | |
| 108 //-------------------------------------------------------------------------- | |
| 109 | |
| 110 static void dbg_make_threadref(Cyg_Thread *thread, threadref *ref ) | |
| 111 { | |
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112 // The following test tries to avoid accessing uninitialized pointers. |
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113 // This can happen if we take a breakpoint before the data is copied |
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114 // or the BSS zeroed. We currently assume that RAM will reset to zero |
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115 // or 0xff. If it is random, we have no hope. |
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116 |
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117 if( (CYG_ADDRWORD)thread == 0 || (CYG_ADDRWORD)thread == 0xffffffff ) |
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118 { |
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119 ((unsigned long *)ref)[0] = 0; |
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120 ((unsigned long *)ref)[1] = 0; |
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121 } |
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122 else |
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123 { |
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124 cyg_uint16 id = thread->get_unique_id(); |
| 0 | 125 |
| 126 #if USE_ID | |
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127 ((unsigned long *)ref)[0] = (unsigned long)thread; |
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128 ((unsigned long *)ref)[1] = (unsigned long)swap32(id); |
| 0 | 129 #else |
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130 ((unsigned long *)ref)[1] = (unsigned long)thread; |
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131 ((unsigned long *)ref)[0] = (unsigned long)id; |
| 0 | 132 #endif |
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133 } |
| 0 | 134 } |
| 135 | |
| 136 static Cyg_Thread *dbg_get_thread( threadref *ref) | |
| 137 { | |
| 138 #if USE_ID | |
| 139 | |
| 140 cyg_uint16 id = 0; | |
| 141 | |
| 142 id = (cyg_uint16)swap32(((unsigned long *)ref)[1]); | |
| 143 | |
| 144 Cyg_Thread *th = Cyg_Thread::get_list_head(); | |
| 145 while( th != 0 ) | |
| 146 { | |
| 147 if( th->get_unique_id() == id ) break; | |
| 148 th = th->get_list_next(); | |
| 149 } | |
| 150 | |
| 151 // if( thread->get_unique_id() != id ) th = 0; | |
| 152 | |
| 153 #else | |
| 154 | |
| 155 cyg_uint16 id = 0; | |
| 156 | |
| 157 Cyg_Thread *thread = (Cyg_Thread *)(((unsigned long *)ref)[1]); | |
| 158 id = (cyg_uint16)(((unsigned long *)ref)[0]); | |
| 159 | |
| 160 // Validate the thread. | |
| 161 Cyg_Thread *th = Cyg_Thread::get_list_head(); | |
| 162 while( th != 0 ) | |
| 163 { | |
| 164 if( th == thread ) break; | |
| 165 th = th->get_list_next(); | |
| 166 } | |
| 167 | |
| 168 // if( thread->get_unique_id() != id ) th = 0; | |
| 169 | |
| 170 #endif | |
| 171 | |
| 172 return th; | |
| 173 } | |
| 174 | |
| 175 //-------------------------------------------------------------------------- | |
| 176 | |
| 177 externC int dbg_currthread(threadref * varparm) | |
| 178 { | |
| 179 Cyg_Thread *thread = Cyg_Scheduler::get_current_thread(); | |
| 180 | |
| 181 dbg_make_threadref(thread, varparm ); | |
| 182 | |
| 183 return 1 ; | |
| 184 } | |
| 185 | |
| 186 //-------------------------------------------------------------------------- | |
| 187 | |
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188 externC int dbg_thread_id(threadref *threadid) |
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189 { |
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190 Cyg_Thread *thread = dbg_get_thread(threadid); |
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191 if( thread == 0 ) return 0; |
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192 return thread->get_unique_id (); |
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193 } |
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194 |
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195 //-------------------------------------------------------------------------- |
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196 |
| 0 | 197 externC int dbg_currthread_id(void) |
| 198 { | |
| 199 Cyg_Thread *thread = Cyg_Scheduler::get_current_thread(); | |
| 200 return thread->get_unique_id (); | |
| 201 } | |
| 202 | |
| 203 //-------------------------------------------------------------------------- | |
| 204 | |
| 205 externC int dbg_threadlist(int startflag, | |
| 2 | 206 threadref * lastthreadid, |
| 207 threadref * next_thread) | |
| 0 | 208 { |
| 209 Cyg_Thread *thread; | |
| 210 if( startflag ) | |
| 211 { | |
| 212 thread = Cyg_Thread::get_list_head(); | |
| 213 dbg_make_threadref(thread, next_thread); | |
| 214 } | |
| 215 else | |
| 216 { | |
| 217 thread = dbg_get_thread(lastthreadid); | |
| 218 | |
| 219 if( thread == 0 ) return 0; | |
| 220 thread = thread->get_list_next(); | |
| 221 | |
| 222 if( thread == 0 ) return 0; | |
| 223 dbg_make_threadref(thread, next_thread); | |
| 224 } | |
| 225 return 1 ; | |
| 226 } | |
| 227 | |
| 228 //-------------------------------------------------------------------------- | |
| 229 // Some support routines for manufacturing thread info strings | |
| 230 | |
| 231 static char *dbg_addstr(char *s, char *t) | |
| 232 { | |
| 233 while( (*s++ = *t++) != 0 ); | |
| 234 | |
| 235 return s-1; | |
| 236 } | |
| 237 | |
| 238 static char *dbg_addint(char *s, int n, int base) | |
| 239 { | |
| 240 char buf[16]; | |
| 241 char sign = '+'; | |
| 242 cyg_count8 bpos; | |
| 2404 | 243 char *digits = (char *)"0123456789ABCDEF"; |
| 0 | 244 |
| 245 if( n < 0 ) n = -n, sign = '-'; | |
| 246 | |
| 247 /* Set pos to start */ | |
| 248 bpos = 0; | |
| 249 | |
| 250 /* construct digits into buffer in reverse order */ | |
| 251 if( n == 0 ) buf[bpos++] = '0'; | |
| 252 else while( n != 0 ) | |
| 253 { | |
| 254 cyg_ucount8 d = n % base; | |
| 255 buf[bpos++] = digits[d]; | |
| 256 n /= base; | |
| 257 } | |
| 258 | |
| 259 /* set sign if negative. */ | |
| 260 if( sign == '-' ) | |
| 261 { | |
| 262 buf[bpos] = sign; | |
| 263 } | |
| 264 else bpos--; | |
| 265 | |
| 266 /* Now write it out in correct order. */ | |
| 267 while( bpos >= 0 ) | |
| 268 *s++ = buf[bpos--]; | |
| 269 | |
| 270 *s = 0; | |
| 271 | |
| 272 return s; | |
| 273 } | |
| 274 | |
| 275 static char *dbg_adddec(char *s, int x) | |
| 276 { | |
| 277 return dbg_addint(s, x, 10); | |
| 278 } | |
| 279 | |
| 280 //-------------------------------------------------------------------------- | |
| 281 | |
| 282 externC int dbg_threadinfo( | |
| 2 | 283 threadref * threadid, |
| 284 struct cygmon_thread_debug_info * info) | |
| 0 | 285 { |
| 286 static char statebuf[60]; | |
| 287 | |
| 288 Cyg_Thread *thread = dbg_get_thread(threadid); | |
| 289 if( thread == 0 ) return 0; | |
| 290 | |
| 291 info->context_exists = 1; | |
| 292 | |
| 293 char *sbp = statebuf; | |
| 294 char *s; | |
| 295 | |
| 296 if( thread->get_state() & Cyg_Thread::SUSPENDED ) | |
| 297 { | |
| 2404 | 298 sbp = dbg_addstr( sbp, (char *)"suspended+"); |
| 0 | 299 } |
| 300 | |
| 301 switch( thread->get_state() & ~Cyg_Thread::SUSPENDED ) | |
| 302 { | |
| 303 case Cyg_Thread::RUNNING: | |
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304 if ( Cyg_Scheduler::get_current_thread() == thread ) { |
| 2404 | 305 s = (char *)"running"; break; |
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306 } |
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307 else if ( thread->get_state() & Cyg_Thread::SUSPENDED ) { |
| 2404 | 308 s = (char *)""; sbp--; /*kill '+'*/ break; |
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309 } |
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310 else { |
| 2404 | 311 s = (char *)"ready"; break; |
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312 } |
| 0 | 313 case Cyg_Thread::SLEEPING: |
| 2404 | 314 s = (char *)"sleeping"; break; |
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315 case Cyg_Thread::COUNTSLEEP | Cyg_Thread::SLEEPING: |
| 0 | 316 case Cyg_Thread::COUNTSLEEP: |
| 2404 | 317 s = (char *)"counted sleep"; break; |
| 0 | 318 case Cyg_Thread::CREATING: |
| 2404 | 319 s = (char *)"creating"; sbp = statebuf; break; |
| 0 | 320 case Cyg_Thread::EXITED: |
| 2404 | 321 s = (char *)"exited"; sbp = statebuf; break; |
| 0 | 322 default: |
| 2404 | 323 s = (char *)"unknown state"; break; |
| 0 | 324 } |
| 325 | |
| 326 sbp = dbg_addstr( sbp, s ); | |
| 2404 | 327 sbp = dbg_addstr( sbp, (char *)", Priority: " ); |
| 0 | 328 sbp = dbg_adddec( sbp, thread->get_priority() ); |
| 329 | |
| 330 info->thread_display = statebuf; | |
| 331 | |
| 332 #ifdef CYGVAR_KERNEL_THREADS_NAME | |
| 333 info->unique_thread_name = thread->get_name(); | |
| 334 #else | |
| 335 info->unique_thread_name = 0; | |
| 336 #endif | |
| 337 | |
| 338 info->more_display = 0; | |
| 339 | |
| 340 return 1 ; | |
| 341 } | |
| 342 | |
| 343 //-------------------------------------------------------------------------- | |
| 344 | |
| 345 externC int dbg_getthreadreg( | |
| 2 | 346 threadref * osthreadid, |
| 347 int regcount, /* count of registers in the array */ | |
| 348 void * regval) /* fillin this array */ | |
| 0 | 349 { |
| 350 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 351 | |
| 352 if( thread == 0 ) return 0; | |
| 353 | |
| 354 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 355 { | |
| 356 #if defined(CYG_HAL_USE_ROM_MONITOR_CYGMON) | |
| 357 // We have no state for the current thread, Cygmon has | |
| 358 // got that and we cannot get at it. | |
| 359 return 0; | |
| 360 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) | |
| 2 | 361 // registers hold the state of the current thread. |
| 362 __stub_copy_registers ((target_register_t *)regval, registers); | |
| 0 | 363 #else |
| 364 return 0; | |
| 365 #endif | |
| 366 } | |
| 367 else | |
| 368 { | |
| 369 HAL_SavedRegisters *regs = thread->get_saved_context(); | |
| 370 if( regs == 0 ) return 0; | |
| 371 | |
| 372 HAL_GET_GDB_REGISTERS (regval, regs); | |
| 373 } | |
| 374 | |
| 375 return 1 ; | |
| 376 } | |
| 377 | |
| 378 //-------------------------------------------------------------------------- | |
| 2 | 379 |
| 0 | 380 externC int dbg_setthreadreg( |
| 2 | 381 threadref * osthreadid, |
| 382 int regcount , /* number of registers */ | |
| 383 void * regval) | |
| 0 | 384 { |
| 385 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 386 | |
| 387 if( thread == 0 ) return 0; | |
| 388 | |
| 389 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 390 { | |
| 391 #if defined(CYG_HAL_USE_ROM_MONITOR_CYGMON) | |
| 392 // We have no state for the current thread, Cygmon has | |
| 393 // got that and we cannot get at it. | |
| 394 return 0; | |
| 395 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) | |
| 2 | 396 // registers hold the state of the current thread. |
| 397 __stub_copy_registers (registers, (target_register_t *)regval); | |
| 0 | 398 #else |
| 399 return 0; | |
| 400 #endif | |
| 401 } | |
| 402 else | |
| 403 { | |
| 404 HAL_SavedRegisters *regs = thread->get_saved_context(); | |
| 405 if( regs == 0 ) return 0; | |
| 406 | |
| 407 HAL_SET_GDB_REGISTERS (regs, regval); | |
| 408 } | |
| 409 | |
| 410 return 1; | |
| 411 } | |
| 412 | |
| 2 | 413 //-------------------------------------------------------------------------- |
| 414 // Thread scheduler control for debugger. | |
| 415 // Arguments: | |
| 416 // osthreadid : must match currently executing thread. | |
| 417 // Future use: change the currently executing thread. | |
| 418 // lock : 0 == unlock scheduler, 1 == lock scheduler | |
| 419 // mode : 0 == single-instruction step, 1 == free running | |
| 420 // | |
| 421 // Return values: | |
| 422 // 1 == success | |
| 423 // 0 == failure | |
| 424 // -1 == request that the caller handle this itself | |
| 425 // (eg.by disabling interrupts) | |
| 426 // | |
| 427 | |
| 428 externC int dbg_scheduler( | |
| 429 threadref * osthreadid, | |
| 430 int lock, /* 0 == unlock, 1 == lock */ | |
| 431 int mode) /* 0 == step, 1 == continue */ | |
| 432 { | |
| 433 #if 0 | |
| 434 /* Minimal implementation: let stub do the work. */ | |
| 435 return -1; // Stub will disable interrupts | |
| 436 #else | |
| 437 Cyg_Thread *thread = dbg_get_thread(osthreadid); | |
| 438 | |
| 439 if( thread == 0 ) return 0; // fail | |
| 440 | |
| 441 if( thread == Cyg_Scheduler::get_current_thread() ) | |
| 442 { | |
| 443 // OK to proceed | |
| 444 | |
| 445 if (lock) | |
| 446 { | |
| 447 Cyg_Scheduler::lock(); | |
| 448 } | |
| 449 else | |
| 450 { | |
| 451 if (Cyg_Scheduler::get_sched_lock() >= 1) | |
| 452 Cyg_Scheduler::unlock_simple(); | |
| 453 } | |
| 454 return 1; // success | |
| 455 } | |
| 456 else | |
| 457 { | |
| 458 // Cannot accept any thread other than current one | |
| 459 return 0; // fail | |
| 460 } | |
| 461 #endif | |
| 462 } | |
| 463 | |
| 464 | |
| 0 | 465 #endif // CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT |
| 466 | |
| 467 //-------------------------------------------------------------------------- | |
| 468 // End of dbg_gdb.cxx |