1 /* Functions specific to running gdb native on HPPA running Linux.
2 Copyright 2004 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. */
24 #include "gdb_string.h"
27 #include <sys/procfs.h>
28 #include <sys/ptrace.h>
29 #include <linux/version.h>
31 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,43)
32 #include <asm/offset.h>
34 #include <asm/offsets.h>
37 #include "hppa-tdep.h"
39 /* Prototypes for supply_gregset etc. */
42 /* These must match the order of the register names.
44 Some sort of lookup table is needed because the offsets associated
45 with the registers are all over the board. */
47 static const int u_offsets[] =
49 /* general registers */
118 /* Floating point regs. */
129 PT_FR10, PT_FR10 + 4,
130 PT_FR11, PT_FR11 + 4,
131 PT_FR12, PT_FR12 + 4,
132 PT_FR13, PT_FR13 + 4,
133 PT_FR14, PT_FR14 + 4,
134 PT_FR15, PT_FR15 + 4,
135 PT_FR16, PT_FR16 + 4,
136 PT_FR17, PT_FR17 + 4,
137 PT_FR18, PT_FR18 + 4,
138 PT_FR19, PT_FR19 + 4,
139 PT_FR20, PT_FR20 + 4,
140 PT_FR21, PT_FR21 + 4,
141 PT_FR22, PT_FR22 + 4,
142 PT_FR23, PT_FR23 + 4,
143 PT_FR24, PT_FR24 + 4,
144 PT_FR25, PT_FR25 + 4,
145 PT_FR26, PT_FR26 + 4,
146 PT_FR27, PT_FR27 + 4,
147 PT_FR28, PT_FR28 + 4,
148 PT_FR29, PT_FR29 + 4,
149 PT_FR30, PT_FR30 + 4,
150 PT_FR31, PT_FR31 + 4,
154 register_addr (int regno, CORE_ADDR blockend)
158 if ((unsigned) regno >= NUM_REGS)
159 error ("Invalid register number %d.", regno);
161 if (u_offsets[regno] == -1)
165 addr = (CORE_ADDR) u_offsets[regno];
172 * Registers saved in a coredump:
177 * sar, iir, isr, ior, ipsw
182 #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
183 #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
184 static const int greg_map[] =
186 GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
187 GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
188 GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
189 GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
190 GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
191 GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
192 GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
193 GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
195 HPPA_SR4_REGNUM+1, HPPA_SR4_REGNUM+2, HPPA_SR4_REGNUM+3, HPPA_SR4_REGNUM+4,
196 HPPA_SR4_REGNUM, HPPA_SR4_REGNUM+5, HPPA_SR4_REGNUM+6, HPPA_SR4_REGNUM+7,
198 HPPA_PCOQ_HEAD_REGNUM, HPPA_PCOQ_TAIL_REGNUM,
199 HPPA_PCSQ_HEAD_REGNUM, HPPA_PCSQ_TAIL_REGNUM,
201 HPPA_SAR_REGNUM, HPPA_IIR_REGNUM, HPPA_ISR_REGNUM, HPPA_IOR_REGNUM,
202 HPPA_IPSW_REGNUM, HPPA_RCR_REGNUM,
204 TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
205 TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
207 HPPA_PID0_REGNUM, HPPA_PID1_REGNUM, HPPA_PID2_REGNUM, HPPA_PID3_REGNUM,
208 HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM,
213 /* Fetch one register. */
216 fetch_register (int regno)
221 if (CANNOT_FETCH_REGISTER (regno))
223 supply_register (regno, NULL);
227 /* GNU/Linux LWP ID's are process ID's. */
228 tid = TIDGET (inferior_ptid);
230 tid = PIDGET (inferior_ptid); /* Not a threaded program. */
233 val = ptrace (PTRACE_PEEKUSER, tid, register_addr (regno, 0), 0);
235 error ("Couldn't read register %s (#%d): %s.", REGISTER_NAME (regno),
236 regno, safe_strerror (errno));
238 regcache_raw_supply (current_regcache, regno, &val);
241 /* Store one register. */
244 store_register (int regno)
249 if (CANNOT_STORE_REGISTER (regno))
252 /* GNU/Linux LWP ID's are process ID's. */
253 tid = TIDGET (inferior_ptid);
255 tid = PIDGET (inferior_ptid); /* Not a threaded program. */
258 regcache_raw_collect (current_regcache, regno, &val);
259 ptrace (PTRACE_POKEUSER, tid, register_addr (regno, 0), val);
261 error ("Couldn't write register %s (#%d): %s.", REGISTER_NAME (regno),
262 regno, safe_strerror (errno));
265 /* Fetch registers from the child process. Fetch all registers if
266 regno == -1, otherwise fetch all general registers or all floating
267 point registers depending upon the value of regno. */
270 fetch_inferior_registers (int regno)
274 for (regno = 0; regno < NUM_REGS; regno++)
275 fetch_register (regno);
279 fetch_register (regno);
283 /* Store registers back into the inferior. Store all registers if
284 regno == -1, otherwise store all general registers or all floating
285 point registers depending upon the value of regno. */
288 store_inferior_registers (int regno)
292 for (regno = 0; regno < NUM_REGS; regno++)
293 store_register (regno);
297 store_register (regno);
301 /* Fill GDB's register array with the general-purpose register values
305 supply_gregset (gdb_gregset_t *gregsetp)
308 greg_t *regp = (elf_greg_t *) gregsetp;
310 for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
312 int regno = greg_map[i];
313 supply_register (regno, regp);
317 /* Fill register regno (if it is a general-purpose register) in
318 *gregsetp with the appropriate value from GDB's register array.
319 If regno is -1, do this for all registers. */
322 fill_gregset (gdb_gregset_t *gregsetp, int regno)
326 for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++)
328 int mregno = greg_map[i];
330 if (regno == -1 || regno == mregno)
332 regcache_collect(mregno, &(*gregsetp)[i]);
337 /* Given a pointer to a floating point register set in /proc format
338 (fpregset_t *), unpack the register contents and supply them as gdb's
339 idea of the current floating point register values. */
342 supply_fpregset (gdb_fpregset_t *fpregsetp)
347 for (regi = 0; regi <= 31; regi++)
349 from = (char *) &((*fpregsetp)[regi]);
350 supply_register (2*regi + HPPA_FP0_REGNUM, from);
351 supply_register (2*regi + HPPA_FP0_REGNUM + 1, from + 4);
355 /* Given a pointer to a floating point register set in /proc format
356 (fpregset_t *), update the register specified by REGNO from gdb's idea
357 of the current floating point register set. If REGNO is -1, update
361 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
365 for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++)
367 /* Gross. fpregset_t is double, registers[x] has single
369 char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]);
370 if ((i - HPPA_FP0_REGNUM) & 1)
372 regcache_collect (i, to);