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ca557f44 AC |
1 | /* Functions specific to running gdb native on IA-64 running |
2 | GNU/Linux. | |
3 | ||
2555fe1a AC |
4 | Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, |
5 | Inc. | |
16461d7d KB |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | #include "defs.h" | |
e162d11b | 25 | #include "gdb_string.h" |
16461d7d KB |
26 | #include "inferior.h" |
27 | #include "target.h" | |
28 | #include "gdbcore.h" | |
4e052eda | 29 | #include "regcache.h" |
16461d7d KB |
30 | |
31 | #include <signal.h> | |
32 | #include <sys/ptrace.h> | |
2555fe1a | 33 | #include "gdb_wait.h" |
16461d7d KB |
34 | #ifdef HAVE_SYS_REG_H |
35 | #include <sys/reg.h> | |
36 | #endif | |
287a334e | 37 | #include <sys/syscall.h> |
16461d7d KB |
38 | #include <sys/user.h> |
39 | ||
40 | #include <asm/ptrace_offsets.h> | |
41 | #include <sys/procfs.h> | |
42 | ||
c60c0f5f MS |
43 | /* Prototypes for supply_gregset etc. */ |
44 | #include "gregset.h" | |
45 | ||
16461d7d KB |
46 | /* These must match the order of the register names. |
47 | ||
48 | Some sort of lookup table is needed because the offsets associated | |
49 | with the registers are all over the board. */ | |
50 | ||
51 | static int u_offsets[] = | |
52 | { | |
53 | /* general registers */ | |
54 | -1, /* gr0 not available; i.e, it's always zero */ | |
55 | PT_R1, | |
56 | PT_R2, | |
57 | PT_R3, | |
58 | PT_R4, | |
59 | PT_R5, | |
60 | PT_R6, | |
61 | PT_R7, | |
62 | PT_R8, | |
63 | PT_R9, | |
64 | PT_R10, | |
65 | PT_R11, | |
66 | PT_R12, | |
67 | PT_R13, | |
68 | PT_R14, | |
69 | PT_R15, | |
70 | PT_R16, | |
71 | PT_R17, | |
72 | PT_R18, | |
73 | PT_R19, | |
74 | PT_R20, | |
75 | PT_R21, | |
76 | PT_R22, | |
77 | PT_R23, | |
78 | PT_R24, | |
79 | PT_R25, | |
80 | PT_R26, | |
81 | PT_R27, | |
82 | PT_R28, | |
83 | PT_R29, | |
84 | PT_R30, | |
85 | PT_R31, | |
86 | /* gr32 through gr127 not directly available via the ptrace interface */ | |
87 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
88 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
89 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
90 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
91 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
92 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
93 | /* Floating point registers */ | |
94 | -1, -1, /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */ | |
95 | PT_F2, | |
96 | PT_F3, | |
97 | PT_F4, | |
98 | PT_F5, | |
99 | PT_F6, | |
100 | PT_F7, | |
101 | PT_F8, | |
102 | PT_F9, | |
103 | PT_F10, | |
104 | PT_F11, | |
105 | PT_F12, | |
106 | PT_F13, | |
107 | PT_F14, | |
108 | PT_F15, | |
109 | PT_F16, | |
110 | PT_F17, | |
111 | PT_F18, | |
112 | PT_F19, | |
113 | PT_F20, | |
114 | PT_F21, | |
115 | PT_F22, | |
116 | PT_F23, | |
117 | PT_F24, | |
118 | PT_F25, | |
119 | PT_F26, | |
120 | PT_F27, | |
121 | PT_F28, | |
122 | PT_F29, | |
123 | PT_F30, | |
124 | PT_F31, | |
125 | PT_F32, | |
126 | PT_F33, | |
127 | PT_F34, | |
128 | PT_F35, | |
129 | PT_F36, | |
130 | PT_F37, | |
131 | PT_F38, | |
132 | PT_F39, | |
133 | PT_F40, | |
134 | PT_F41, | |
135 | PT_F42, | |
136 | PT_F43, | |
137 | PT_F44, | |
138 | PT_F45, | |
139 | PT_F46, | |
140 | PT_F47, | |
141 | PT_F48, | |
142 | PT_F49, | |
143 | PT_F50, | |
144 | PT_F51, | |
145 | PT_F52, | |
146 | PT_F53, | |
147 | PT_F54, | |
148 | PT_F55, | |
149 | PT_F56, | |
150 | PT_F57, | |
151 | PT_F58, | |
152 | PT_F59, | |
153 | PT_F60, | |
154 | PT_F61, | |
155 | PT_F62, | |
156 | PT_F63, | |
157 | PT_F64, | |
158 | PT_F65, | |
159 | PT_F66, | |
160 | PT_F67, | |
161 | PT_F68, | |
162 | PT_F69, | |
163 | PT_F70, | |
164 | PT_F71, | |
165 | PT_F72, | |
166 | PT_F73, | |
167 | PT_F74, | |
168 | PT_F75, | |
169 | PT_F76, | |
170 | PT_F77, | |
171 | PT_F78, | |
172 | PT_F79, | |
173 | PT_F80, | |
174 | PT_F81, | |
175 | PT_F82, | |
176 | PT_F83, | |
177 | PT_F84, | |
178 | PT_F85, | |
179 | PT_F86, | |
180 | PT_F87, | |
181 | PT_F88, | |
182 | PT_F89, | |
183 | PT_F90, | |
184 | PT_F91, | |
185 | PT_F92, | |
186 | PT_F93, | |
187 | PT_F94, | |
188 | PT_F95, | |
189 | PT_F96, | |
190 | PT_F97, | |
191 | PT_F98, | |
192 | PT_F99, | |
193 | PT_F100, | |
194 | PT_F101, | |
195 | PT_F102, | |
196 | PT_F103, | |
197 | PT_F104, | |
198 | PT_F105, | |
199 | PT_F106, | |
200 | PT_F107, | |
201 | PT_F108, | |
202 | PT_F109, | |
203 | PT_F110, | |
204 | PT_F111, | |
205 | PT_F112, | |
206 | PT_F113, | |
207 | PT_F114, | |
208 | PT_F115, | |
209 | PT_F116, | |
210 | PT_F117, | |
211 | PT_F118, | |
212 | PT_F119, | |
213 | PT_F120, | |
214 | PT_F121, | |
215 | PT_F122, | |
216 | PT_F123, | |
217 | PT_F124, | |
218 | PT_F125, | |
219 | PT_F126, | |
220 | PT_F127, | |
221 | /* predicate registers - we don't fetch these individually */ | |
222 | -1, -1, -1, -1, -1, -1, -1, -1, | |
223 | -1, -1, -1, -1, -1, -1, -1, -1, | |
224 | -1, -1, -1, -1, -1, -1, -1, -1, | |
225 | -1, -1, -1, -1, -1, -1, -1, -1, | |
226 | -1, -1, -1, -1, -1, -1, -1, -1, | |
227 | -1, -1, -1, -1, -1, -1, -1, -1, | |
228 | -1, -1, -1, -1, -1, -1, -1, -1, | |
229 | -1, -1, -1, -1, -1, -1, -1, -1, | |
230 | /* branch registers */ | |
231 | PT_B0, | |
232 | PT_B1, | |
233 | PT_B2, | |
234 | PT_B3, | |
235 | PT_B4, | |
236 | PT_B5, | |
237 | PT_B6, | |
238 | PT_B7, | |
239 | /* virtual frame pointer and virtual return address pointer */ | |
240 | -1, -1, | |
241 | /* other registers */ | |
242 | PT_PR, | |
243 | PT_CR_IIP, /* ip */ | |
244 | PT_CR_IPSR, /* psr */ | |
9ac12c35 | 245 | PT_CFM, /* cfm */ |
16461d7d KB |
246 | /* kernel registers not visible via ptrace interface (?) */ |
247 | -1, -1, -1, -1, -1, -1, -1, -1, | |
248 | /* hole */ | |
249 | -1, -1, -1, -1, -1, -1, -1, -1, | |
250 | PT_AR_RSC, | |
251 | PT_AR_BSP, | |
252 | PT_AR_BSPSTORE, | |
253 | PT_AR_RNAT, | |
254 | -1, | |
255 | -1, /* Not available: FCR, IA32 floating control register */ | |
256 | -1, -1, | |
257 | -1, /* Not available: EFLAG */ | |
258 | -1, /* Not available: CSD */ | |
259 | -1, /* Not available: SSD */ | |
260 | -1, /* Not available: CFLG */ | |
261 | -1, /* Not available: FSR */ | |
262 | -1, /* Not available: FIR */ | |
263 | -1, /* Not available: FDR */ | |
264 | -1, | |
265 | PT_AR_CCV, | |
266 | -1, -1, -1, | |
267 | PT_AR_UNAT, | |
268 | -1, -1, -1, | |
269 | PT_AR_FPSR, | |
270 | -1, -1, -1, | |
271 | -1, /* Not available: ITC */ | |
272 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
273 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
274 | PT_AR_PFS, | |
275 | PT_AR_LC, | |
276 | -1, /* Not available: EC, the Epilog Count register */ | |
277 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
278 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
279 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
280 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
281 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
282 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
283 | -1, | |
284 | /* nat bits - not fetched directly; instead we obtain these bits from | |
285 | either rnat or unat or from memory. */ | |
286 | -1, -1, -1, -1, -1, -1, -1, -1, | |
287 | -1, -1, -1, -1, -1, -1, -1, -1, | |
288 | -1, -1, -1, -1, -1, -1, -1, -1, | |
289 | -1, -1, -1, -1, -1, -1, -1, -1, | |
290 | -1, -1, -1, -1, -1, -1, -1, -1, | |
291 | -1, -1, -1, -1, -1, -1, -1, -1, | |
292 | -1, -1, -1, -1, -1, -1, -1, -1, | |
293 | -1, -1, -1, -1, -1, -1, -1, -1, | |
294 | -1, -1, -1, -1, -1, -1, -1, -1, | |
295 | -1, -1, -1, -1, -1, -1, -1, -1, | |
296 | -1, -1, -1, -1, -1, -1, -1, -1, | |
297 | -1, -1, -1, -1, -1, -1, -1, -1, | |
298 | -1, -1, -1, -1, -1, -1, -1, -1, | |
299 | -1, -1, -1, -1, -1, -1, -1, -1, | |
300 | -1, -1, -1, -1, -1, -1, -1, -1, | |
301 | -1, -1, -1, -1, -1, -1, -1, -1, | |
302 | }; | |
303 | ||
304 | CORE_ADDR | |
fba45db2 | 305 | register_addr (int regno, CORE_ADDR blockend) |
16461d7d KB |
306 | { |
307 | CORE_ADDR addr; | |
308 | ||
309 | if (regno < 0 || regno >= NUM_REGS) | |
310 | error ("Invalid register number %d.", regno); | |
311 | ||
312 | if (u_offsets[regno] == -1) | |
313 | addr = 0; | |
314 | else | |
315 | addr = (CORE_ADDR) u_offsets[regno]; | |
316 | ||
317 | return addr; | |
318 | } | |
319 | ||
320 | int ia64_cannot_fetch_register (regno) | |
321 | int regno; | |
322 | { | |
323 | return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1; | |
324 | } | |
325 | ||
326 | int ia64_cannot_store_register (regno) | |
327 | int regno; | |
328 | { | |
329 | /* Rationale behind not permitting stores to bspstore... | |
330 | ||
331 | The IA-64 architecture provides bspstore and bsp which refer | |
332 | memory locations in the RSE's backing store. bspstore is the | |
333 | next location which will be written when the RSE needs to write | |
334 | to memory. bsp is the address at which r32 in the current frame | |
335 | would be found if it were written to the backing store. | |
336 | ||
337 | The IA-64 architecture provides read-only access to bsp and | |
338 | read/write access to bspstore (but only when the RSE is in | |
339 | the enforced lazy mode). It should be noted that stores | |
340 | to bspstore also affect the value of bsp. Changing bspstore | |
341 | does not affect the number of dirty entries between bspstore | |
342 | and bsp, so changing bspstore by N words will also cause bsp | |
343 | to be changed by (roughly) N as well. (It could be N-1 or N+1 | |
344 | depending upon where the NaT collection bits fall.) | |
345 | ||
92362027 | 346 | OTOH, the Linux kernel provides read/write access to bsp (and |
16461d7d KB |
347 | currently read/write access to bspstore as well). But it |
348 | is definitely the case that if you change one, the other | |
349 | will change at the same time. It is more useful to gdb to | |
350 | be able to change bsp. So in order to prevent strange and | |
351 | undesirable things from happening when a dummy stack frame | |
352 | is popped (after calling an inferior function), we allow | |
353 | bspstore to be read, but not written. (Note that popping | |
354 | a (generic) dummy stack frame causes all registers that | |
355 | were previously read from the inferior process to be written | |
356 | back.) */ | |
357 | ||
358 | return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1 | |
359 | || regno == IA64_BSPSTORE_REGNUM; | |
360 | } | |
361 | ||
362 | void | |
fba45db2 | 363 | supply_gregset (gregset_t *gregsetp) |
16461d7d KB |
364 | { |
365 | int regi; | |
366 | greg_t *regp = (greg_t *) gregsetp; | |
367 | ||
368 | for (regi = IA64_GR0_REGNUM; regi <= IA64_GR31_REGNUM; regi++) | |
369 | { | |
370 | supply_register (regi, (char *) (regp + (regi - IA64_GR0_REGNUM))); | |
371 | } | |
372 | ||
373 | /* FIXME: NAT collection bits are at index 32; gotta deal with these | |
374 | somehow... */ | |
375 | ||
376 | supply_register (IA64_PR_REGNUM, (char *) (regp + 33)); | |
377 | ||
378 | for (regi = IA64_BR0_REGNUM; regi <= IA64_BR7_REGNUM; regi++) | |
379 | { | |
380 | supply_register (regi, (char *) (regp + 34 + (regi - IA64_BR0_REGNUM))); | |
381 | } | |
382 | ||
383 | supply_register (IA64_IP_REGNUM, (char *) (regp + 42)); | |
384 | supply_register (IA64_CFM_REGNUM, (char *) (regp + 43)); | |
385 | supply_register (IA64_PSR_REGNUM, (char *) (regp + 44)); | |
386 | supply_register (IA64_RSC_REGNUM, (char *) (regp + 45)); | |
387 | supply_register (IA64_BSP_REGNUM, (char *) (regp + 46)); | |
388 | supply_register (IA64_BSPSTORE_REGNUM, (char *) (regp + 47)); | |
389 | supply_register (IA64_RNAT_REGNUM, (char *) (regp + 48)); | |
390 | supply_register (IA64_CCV_REGNUM, (char *) (regp + 49)); | |
391 | supply_register (IA64_UNAT_REGNUM, (char *) (regp + 50)); | |
392 | supply_register (IA64_FPSR_REGNUM, (char *) (regp + 51)); | |
393 | supply_register (IA64_PFS_REGNUM, (char *) (regp + 52)); | |
394 | supply_register (IA64_LC_REGNUM, (char *) (regp + 53)); | |
395 | supply_register (IA64_EC_REGNUM, (char *) (regp + 54)); | |
396 | } | |
397 | ||
398 | void | |
fba45db2 | 399 | fill_gregset (gregset_t *gregsetp, int regno) |
16461d7d | 400 | { |
76d689a6 KB |
401 | int regi; |
402 | greg_t *regp = (greg_t *) gregsetp; | |
403 | ||
404 | #define COPY_REG(_idx_,_regi_) \ | |
405 | if ((regno == -1) || regno == _regi_) \ | |
62700349 | 406 | memcpy (regp + _idx_, &deprecated_registers[DEPRECATED_REGISTER_BYTE (_regi_)], \ |
12c266ea | 407 | DEPRECATED_REGISTER_RAW_SIZE (_regi_)) |
76d689a6 KB |
408 | |
409 | for (regi = IA64_GR0_REGNUM; regi <= IA64_GR31_REGNUM; regi++) | |
410 | { | |
411 | COPY_REG (regi - IA64_GR0_REGNUM, regi); | |
412 | } | |
413 | ||
414 | /* FIXME: NAT collection bits at index 32? */ | |
415 | ||
416 | COPY_REG (33, IA64_PR_REGNUM); | |
417 | ||
418 | for (regi = IA64_BR0_REGNUM; regi <= IA64_BR7_REGNUM; regi++) | |
419 | { | |
420 | COPY_REG (34 + (regi - IA64_BR0_REGNUM), regi); | |
421 | } | |
422 | ||
423 | COPY_REG (42, IA64_IP_REGNUM); | |
424 | COPY_REG (43, IA64_CFM_REGNUM); | |
425 | COPY_REG (44, IA64_PSR_REGNUM); | |
426 | COPY_REG (45, IA64_RSC_REGNUM); | |
427 | COPY_REG (46, IA64_BSP_REGNUM); | |
428 | COPY_REG (47, IA64_BSPSTORE_REGNUM); | |
429 | COPY_REG (48, IA64_RNAT_REGNUM); | |
430 | COPY_REG (49, IA64_CCV_REGNUM); | |
431 | COPY_REG (50, IA64_UNAT_REGNUM); | |
432 | COPY_REG (51, IA64_FPSR_REGNUM); | |
433 | COPY_REG (52, IA64_PFS_REGNUM); | |
434 | COPY_REG (53, IA64_LC_REGNUM); | |
435 | COPY_REG (54, IA64_EC_REGNUM); | |
436 | } | |
437 | ||
438 | /* Given a pointer to a floating point register set in /proc format | |
439 | (fpregset_t *), unpack the register contents and supply them as gdb's | |
440 | idea of the current floating point register values. */ | |
441 | ||
442 | void | |
fba45db2 | 443 | supply_fpregset (fpregset_t *fpregsetp) |
76d689a6 | 444 | { |
52f0bd74 | 445 | int regi; |
76d689a6 KB |
446 | char *from; |
447 | ||
448 | for (regi = IA64_FR0_REGNUM; regi <= IA64_FR127_REGNUM; regi++) | |
449 | { | |
450 | from = (char *) &((*fpregsetp)[regi - IA64_FR0_REGNUM]); | |
451 | supply_register (regi, from); | |
452 | } | |
453 | } | |
454 | ||
455 | /* Given a pointer to a floating point register set in /proc format | |
456 | (fpregset_t *), update the register specified by REGNO from gdb's idea | |
457 | of the current floating point register set. If REGNO is -1, update | |
458 | them all. */ | |
459 | ||
460 | void | |
fba45db2 | 461 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
76d689a6 KB |
462 | { |
463 | int regi; | |
464 | char *to; | |
465 | char *from; | |
466 | ||
467 | for (regi = IA64_FR0_REGNUM; regi <= IA64_FR127_REGNUM; regi++) | |
468 | { | |
469 | if ((regno == -1) || (regno == regi)) | |
470 | { | |
62700349 | 471 | from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)]; |
76d689a6 | 472 | to = (char *) &((*fpregsetp)[regi - IA64_FR0_REGNUM]); |
12c266ea | 473 | memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regi)); |
76d689a6 KB |
474 | } |
475 | } | |
16461d7d | 476 | } |
acf7b9e1 KB |
477 | |
478 | #define IA64_PSR_DB (1UL << 24) | |
479 | #define IA64_PSR_DD (1UL << 39) | |
480 | ||
481 | static void | |
39f77062 | 482 | enable_watchpoints_in_psr (ptid_t ptid) |
acf7b9e1 KB |
483 | { |
484 | CORE_ADDR psr; | |
485 | ||
39f77062 | 486 | psr = read_register_pid (IA64_PSR_REGNUM, ptid); |
acf7b9e1 KB |
487 | if (!(psr & IA64_PSR_DB)) |
488 | { | |
489 | psr |= IA64_PSR_DB; /* Set the db bit - this enables hardware | |
490 | watchpoints and breakpoints. */ | |
39f77062 | 491 | write_register_pid (IA64_PSR_REGNUM, psr, ptid); |
acf7b9e1 KB |
492 | } |
493 | } | |
494 | ||
495 | static long | |
39f77062 | 496 | fetch_debug_register (ptid_t ptid, int idx) |
acf7b9e1 KB |
497 | { |
498 | long val; | |
499 | int tid; | |
500 | ||
39f77062 | 501 | tid = TIDGET (ptid); |
acf7b9e1 | 502 | if (tid == 0) |
39f77062 | 503 | tid = PIDGET (ptid); |
acf7b9e1 KB |
504 | |
505 | val = ptrace (PT_READ_U, tid, (PTRACE_ARG3_TYPE) (PT_DBR + 8 * idx), 0); | |
506 | ||
507 | return val; | |
508 | } | |
509 | ||
510 | static void | |
39f77062 | 511 | store_debug_register (ptid_t ptid, int idx, long val) |
acf7b9e1 KB |
512 | { |
513 | int tid; | |
514 | ||
39f77062 | 515 | tid = TIDGET (ptid); |
acf7b9e1 | 516 | if (tid == 0) |
39f77062 | 517 | tid = PIDGET (ptid); |
acf7b9e1 KB |
518 | |
519 | (void) ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) (PT_DBR + 8 * idx), val); | |
520 | } | |
521 | ||
522 | static void | |
39f77062 | 523 | fetch_debug_register_pair (ptid_t ptid, int idx, long *dbr_addr, long *dbr_mask) |
acf7b9e1 KB |
524 | { |
525 | if (dbr_addr) | |
39f77062 | 526 | *dbr_addr = fetch_debug_register (ptid, 2 * idx); |
acf7b9e1 | 527 | if (dbr_mask) |
39f77062 | 528 | *dbr_mask = fetch_debug_register (ptid, 2 * idx + 1); |
acf7b9e1 KB |
529 | } |
530 | ||
531 | static void | |
39f77062 | 532 | store_debug_register_pair (ptid_t ptid, int idx, long *dbr_addr, long *dbr_mask) |
acf7b9e1 KB |
533 | { |
534 | if (dbr_addr) | |
39f77062 | 535 | store_debug_register (ptid, 2 * idx, *dbr_addr); |
acf7b9e1 | 536 | if (dbr_mask) |
39f77062 | 537 | store_debug_register (ptid, 2 * idx + 1, *dbr_mask); |
acf7b9e1 KB |
538 | } |
539 | ||
540 | static int | |
541 | is_power_of_2 (int val) | |
542 | { | |
543 | int i, onecount; | |
544 | ||
545 | onecount = 0; | |
546 | for (i = 0; i < 8 * sizeof (val); i++) | |
547 | if (val & (1 << i)) | |
548 | onecount++; | |
549 | ||
550 | return onecount <= 1; | |
551 | } | |
552 | ||
553 | int | |
39f77062 | 554 | ia64_linux_insert_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rw) |
acf7b9e1 KB |
555 | { |
556 | int idx; | |
557 | long dbr_addr, dbr_mask; | |
558 | int max_watchpoints = 4; | |
559 | ||
560 | if (len <= 0 || !is_power_of_2 (len)) | |
561 | return -1; | |
562 | ||
563 | for (idx = 0; idx < max_watchpoints; idx++) | |
564 | { | |
39f77062 | 565 | fetch_debug_register_pair (ptid, idx, NULL, &dbr_mask); |
acf7b9e1 KB |
566 | if ((dbr_mask & (0x3UL << 62)) == 0) |
567 | { | |
568 | /* Exit loop if both r and w bits clear */ | |
569 | break; | |
570 | } | |
571 | } | |
572 | ||
573 | if (idx == max_watchpoints) | |
574 | return -1; | |
575 | ||
576 | dbr_addr = (long) addr; | |
577 | dbr_mask = (~(len - 1) & 0x00ffffffffffffffL); /* construct mask to match */ | |
578 | dbr_mask |= 0x0800000000000000L; /* Only match privilege level 3 */ | |
579 | switch (rw) | |
580 | { | |
581 | case hw_write: | |
582 | dbr_mask |= (1L << 62); /* Set w bit */ | |
583 | break; | |
584 | case hw_read: | |
585 | dbr_mask |= (1L << 63); /* Set r bit */ | |
586 | break; | |
587 | case hw_access: | |
588 | dbr_mask |= (3L << 62); /* Set both r and w bits */ | |
589 | break; | |
590 | default: | |
591 | return -1; | |
592 | } | |
593 | ||
39f77062 KB |
594 | store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask); |
595 | enable_watchpoints_in_psr (ptid); | |
acf7b9e1 KB |
596 | |
597 | return 0; | |
598 | } | |
599 | ||
600 | int | |
39f77062 | 601 | ia64_linux_remove_watchpoint (ptid_t ptid, CORE_ADDR addr, int len) |
acf7b9e1 KB |
602 | { |
603 | int idx; | |
604 | long dbr_addr, dbr_mask; | |
605 | int max_watchpoints = 4; | |
606 | ||
607 | if (len <= 0 || !is_power_of_2 (len)) | |
608 | return -1; | |
609 | ||
610 | for (idx = 0; idx < max_watchpoints; idx++) | |
611 | { | |
39f77062 | 612 | fetch_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask); |
acf7b9e1 KB |
613 | if ((dbr_mask & (0x3UL << 62)) && addr == (CORE_ADDR) dbr_addr) |
614 | { | |
615 | dbr_addr = 0; | |
616 | dbr_mask = 0; | |
39f77062 | 617 | store_debug_register_pair (ptid, idx, &dbr_addr, &dbr_mask); |
acf7b9e1 KB |
618 | return 0; |
619 | } | |
620 | } | |
621 | return -1; | |
622 | } | |
623 | ||
624 | CORE_ADDR | |
39f77062 | 625 | ia64_linux_stopped_by_watchpoint (ptid_t ptid) |
acf7b9e1 KB |
626 | { |
627 | CORE_ADDR psr; | |
628 | int tid; | |
629 | struct siginfo siginfo; | |
630 | ||
39f77062 | 631 | tid = TIDGET(ptid); |
acf7b9e1 | 632 | if (tid == 0) |
39f77062 | 633 | tid = PIDGET (ptid); |
acf7b9e1 KB |
634 | |
635 | errno = 0; | |
636 | ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_ARG3_TYPE) 0, &siginfo); | |
637 | ||
705b278b JJ |
638 | if (errno != 0 || siginfo.si_signo != SIGTRAP || |
639 | (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
acf7b9e1 KB |
640 | return 0; |
641 | ||
39f77062 | 642 | psr = read_register_pid (IA64_PSR_REGNUM, ptid); |
acf7b9e1 KB |
643 | psr |= IA64_PSR_DD; /* Set the dd bit - this will disable the watchpoint |
644 | for the next instruction */ | |
39f77062 | 645 | write_register_pid (IA64_PSR_REGNUM, psr, ptid); |
acf7b9e1 KB |
646 | |
647 | return (CORE_ADDR) siginfo.si_addr; | |
648 | } | |
287a334e JJ |
649 | |
650 | LONGEST | |
651 | ia64_linux_xfer_unwind_table (struct target_ops *ops, | |
652 | enum target_object object, | |
653 | const char *annex, | |
654 | void *readbuf, const void *writebuf, | |
655 | ULONGEST offset, LONGEST len) | |
656 | { | |
657 | return syscall (__NR_getunwind, readbuf, len); | |
658 | } |