1 /* Functions specific to running gdb native on IA-64 running Linux.
2 Copyright 1999, 2000 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
27 #include <sys/ptrace.h>
34 #include <asm/ptrace_offsets.h>
35 #include <sys/procfs.h>
37 /* These must match the order of the register names.
39 Some sort of lookup table is needed because the offsets associated
40 with the registers are all over the board. */
42 static int u_offsets[] =
44 /* general registers */
45 -1, /* gr0 not available; i.e, it's always zero */
77 /* gr32 through gr127 not directly available via the ptrace interface */
78 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
79 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
80 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
81 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
82 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
83 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
84 /* Floating point registers */
85 -1, -1, /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
212 /* predicate registers - we don't fetch these individually */
213 -1, -1, -1, -1, -1, -1, -1, -1,
214 -1, -1, -1, -1, -1, -1, -1, -1,
215 -1, -1, -1, -1, -1, -1, -1, -1,
216 -1, -1, -1, -1, -1, -1, -1, -1,
217 -1, -1, -1, -1, -1, -1, -1, -1,
218 -1, -1, -1, -1, -1, -1, -1, -1,
219 -1, -1, -1, -1, -1, -1, -1, -1,
220 -1, -1, -1, -1, -1, -1, -1, -1,
221 /* branch registers */
230 /* virtual frame pointer and virtual return address pointer */
232 /* other registers */
235 PT_CR_IPSR, /* psr */
237 /* kernel registers not visible via ptrace interface (?) */
238 -1, -1, -1, -1, -1, -1, -1, -1,
240 -1, -1, -1, -1, -1, -1, -1, -1,
246 -1, /* Not available: FCR, IA32 floating control register */
248 -1, /* Not available: EFLAG */
249 -1, /* Not available: CSD */
250 -1, /* Not available: SSD */
251 -1, /* Not available: CFLG */
252 -1, /* Not available: FSR */
253 -1, /* Not available: FIR */
254 -1, /* Not available: FDR */
262 -1, /* Not available: ITC */
263 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
264 -1, -1, -1, -1, -1, -1, -1, -1, -1,
267 -1, /* Not available: EC, the Epilog Count register */
268 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
269 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
270 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
271 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
272 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
273 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
275 /* nat bits - not fetched directly; instead we obtain these bits from
276 either rnat or unat or from memory. */
277 -1, -1, -1, -1, -1, -1, -1, -1,
278 -1, -1, -1, -1, -1, -1, -1, -1,
279 -1, -1, -1, -1, -1, -1, -1, -1,
280 -1, -1, -1, -1, -1, -1, -1, -1,
281 -1, -1, -1, -1, -1, -1, -1, -1,
282 -1, -1, -1, -1, -1, -1, -1, -1,
283 -1, -1, -1, -1, -1, -1, -1, -1,
284 -1, -1, -1, -1, -1, -1, -1, -1,
285 -1, -1, -1, -1, -1, -1, -1, -1,
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,
296 register_addr (regno, blockend)
302 if (regno < 0 || regno >= NUM_REGS)
303 error ("Invalid register number %d.", regno);
305 if (u_offsets[regno] == -1)
308 addr = (CORE_ADDR) u_offsets[regno];
313 int ia64_cannot_fetch_register (regno)
316 return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1;
319 int ia64_cannot_store_register (regno)
322 /* Rationale behind not permitting stores to bspstore...
324 The IA-64 architecture provides bspstore and bsp which refer
325 memory locations in the RSE's backing store. bspstore is the
326 next location which will be written when the RSE needs to write
327 to memory. bsp is the address at which r32 in the current frame
328 would be found if it were written to the backing store.
330 The IA-64 architecture provides read-only access to bsp and
331 read/write access to bspstore (but only when the RSE is in
332 the enforced lazy mode). It should be noted that stores
333 to bspstore also affect the value of bsp. Changing bspstore
334 does not affect the number of dirty entries between bspstore
335 and bsp, so changing bspstore by N words will also cause bsp
336 to be changed by (roughly) N as well. (It could be N-1 or N+1
337 depending upon where the NaT collection bits fall.)
339 OTOH, the linux kernel provides read/write access to bsp (and
340 currently read/write access to bspstore as well). But it
341 is definitely the case that if you change one, the other
342 will change at the same time. It is more useful to gdb to
343 be able to change bsp. So in order to prevent strange and
344 undesirable things from happening when a dummy stack frame
345 is popped (after calling an inferior function), we allow
346 bspstore to be read, but not written. (Note that popping
347 a (generic) dummy stack frame causes all registers that
348 were previously read from the inferior process to be written
351 return regno < 0 || regno >= NUM_REGS || u_offsets[regno] == -1
352 || regno == IA64_BSPSTORE_REGNUM;
356 supply_gregset (gregsetp)
360 greg_t *regp = (greg_t *) gregsetp;
362 for (regi = IA64_GR0_REGNUM; regi <= IA64_GR31_REGNUM; regi++)
364 supply_register (regi, (char *) (regp + (regi - IA64_GR0_REGNUM)));
367 /* FIXME: NAT collection bits are at index 32; gotta deal with these
370 supply_register (IA64_PR_REGNUM, (char *) (regp + 33));
372 for (regi = IA64_BR0_REGNUM; regi <= IA64_BR7_REGNUM; regi++)
374 supply_register (regi, (char *) (regp + 34 + (regi - IA64_BR0_REGNUM)));
377 supply_register (IA64_IP_REGNUM, (char *) (regp + 42));
378 supply_register (IA64_CFM_REGNUM, (char *) (regp + 43));
379 supply_register (IA64_PSR_REGNUM, (char *) (regp + 44));
380 supply_register (IA64_RSC_REGNUM, (char *) (regp + 45));
381 supply_register (IA64_BSP_REGNUM, (char *) (regp + 46));
382 supply_register (IA64_BSPSTORE_REGNUM, (char *) (regp + 47));
383 supply_register (IA64_RNAT_REGNUM, (char *) (regp + 48));
384 supply_register (IA64_CCV_REGNUM, (char *) (regp + 49));
385 supply_register (IA64_UNAT_REGNUM, (char *) (regp + 50));
386 supply_register (IA64_FPSR_REGNUM, (char *) (regp + 51));
387 supply_register (IA64_PFS_REGNUM, (char *) (regp + 52));
388 supply_register (IA64_LC_REGNUM, (char *) (regp + 53));
389 supply_register (IA64_EC_REGNUM, (char *) (regp + 54));
393 fill_gregset (gregsetp, regno)
397 fprintf (stderr, "Warning: fill_gregset not implemented!\n");
398 /* FIXME: Implement later */