1 /* Functions specific to running GDB native on HPPA running GNU/Linux.
3 Copyright (C) 2004-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "linux-nat.h"
26 #include "inf-ptrace.h"
28 #include <sys/procfs.h>
29 #include "nat/gdb_ptrace.h"
30 #include <linux/version.h>
32 #include <asm/ptrace.h>
33 #include "hppa-linux-offsets.h"
35 #include "hppa-tdep.h"
37 class hppa_linux_nat_target final : public linux_nat_target
40 /* Add our register access methods. */
41 void fetch_registers (struct regcache *, int) override;
42 void store_registers (struct regcache *, int) override;
45 static hppa_linux_nat_target the_hppa_linux_nat_target;
47 /* Prototypes for supply_gregset etc. */
50 /* These must match the order of the register names.
52 Some sort of lookup table is needed because the offsets associated
53 with the registers are all over the board. */
55 static const int u_offsets[] =
57 /* general registers */
126 /* Floating point regs. */
137 PT_FR10, PT_FR10 + 4,
138 PT_FR11, PT_FR11 + 4,
139 PT_FR12, PT_FR12 + 4,
140 PT_FR13, PT_FR13 + 4,
141 PT_FR14, PT_FR14 + 4,
142 PT_FR15, PT_FR15 + 4,
143 PT_FR16, PT_FR16 + 4,
144 PT_FR17, PT_FR17 + 4,
145 PT_FR18, PT_FR18 + 4,
146 PT_FR19, PT_FR19 + 4,
147 PT_FR20, PT_FR20 + 4,
148 PT_FR21, PT_FR21 + 4,
149 PT_FR22, PT_FR22 + 4,
150 PT_FR23, PT_FR23 + 4,
151 PT_FR24, PT_FR24 + 4,
152 PT_FR25, PT_FR25 + 4,
153 PT_FR26, PT_FR26 + 4,
154 PT_FR27, PT_FR27 + 4,
155 PT_FR28, PT_FR28 + 4,
156 PT_FR29, PT_FR29 + 4,
157 PT_FR30, PT_FR30 + 4,
158 PT_FR31, PT_FR31 + 4,
162 hppa_linux_register_addr (int regno, CORE_ADDR blockend)
166 if ((unsigned) regno >= ARRAY_SIZE (u_offsets))
167 error (_("Invalid register number %d."), regno);
169 if (u_offsets[regno] == -1)
173 addr = (CORE_ADDR) u_offsets[regno];
180 * Registers saved in a coredump:
185 * sar, iir, isr, ior, ipsw
190 #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
191 #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
192 static const int greg_map[] =
194 GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
195 GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
196 GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
197 GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
198 GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
199 GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
200 GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
201 GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
203 HPPA_SR4_REGNUM+1, HPPA_SR4_REGNUM+2, HPPA_SR4_REGNUM+3, HPPA_SR4_REGNUM+4,
204 HPPA_SR4_REGNUM, HPPA_SR4_REGNUM+5, HPPA_SR4_REGNUM+6, HPPA_SR4_REGNUM+7,
206 HPPA_PCOQ_HEAD_REGNUM, HPPA_PCOQ_TAIL_REGNUM,
207 HPPA_PCSQ_HEAD_REGNUM, HPPA_PCSQ_TAIL_REGNUM,
209 HPPA_SAR_REGNUM, HPPA_IIR_REGNUM, HPPA_ISR_REGNUM, HPPA_IOR_REGNUM,
210 HPPA_IPSW_REGNUM, HPPA_RCR_REGNUM,
212 TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
213 TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
215 HPPA_PID0_REGNUM, HPPA_PID1_REGNUM, HPPA_PID2_REGNUM, HPPA_PID3_REGNUM,
216 HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM,
221 /* Fetch one register. */
224 fetch_register (struct regcache *regcache, int regno)
226 struct gdbarch *gdbarch = regcache->arch ();
230 if (gdbarch_cannot_fetch_register (gdbarch, regno))
232 regcache->raw_supply (regno, NULL);
236 tid = get_ptrace_pid (regcache->ptid ());
239 val = ptrace (PTRACE_PEEKUSER, tid, hppa_linux_register_addr (regno, 0), 0);
241 error (_("Couldn't read register %s (#%d): %s."),
242 gdbarch_register_name (gdbarch, regno),
243 regno, safe_strerror (errno));
245 regcache->raw_supply (regno, &val);
248 /* Store one register. */
251 store_register (const struct regcache *regcache, int regno)
253 struct gdbarch *gdbarch = regcache->arch ();
257 if (gdbarch_cannot_store_register (gdbarch, regno))
260 tid = get_ptrace_pid (regcache->ptid ());
263 regcache->raw_collect (regno, &val);
264 ptrace (PTRACE_POKEUSER, tid, hppa_linux_register_addr (regno, 0), val);
266 error (_("Couldn't write register %s (#%d): %s."),
267 gdbarch_register_name (gdbarch, regno),
268 regno, safe_strerror (errno));
271 /* Fetch registers from the child process. Fetch all registers if
272 regno == -1, otherwise fetch all general registers or all floating
273 point registers depending upon the value of regno. */
276 hppa_linux_nat_target::fetch_registers (struct regcache *regcache, int regno)
281 regno < gdbarch_num_regs (regcache->arch ());
283 fetch_register (regcache, regno);
287 fetch_register (regcache, regno);
291 /* Store registers back into the inferior. Store all registers if
292 regno == -1, otherwise store all general registers or all floating
293 point registers depending upon the value of regno. */
296 hppa_linux_nat_target::store_registers (struct regcache *regcache, int regno)
301 regno < gdbarch_num_regs (regcache->arch ());
303 store_register (regcache, regno);
307 store_register (regcache, regno);
311 /* Fill GDB's register array with the general-purpose register values
315 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
318 const greg_t *regp = (const elf_greg_t *) gregsetp;
320 for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
322 int regno = greg_map[i];
323 regcache->raw_supply (regno, regp);
327 /* Fill register regno (if it is a general-purpose register) in
328 *gregsetp with the appropriate value from GDB's register array.
329 If regno is -1, do this for all registers. */
332 fill_gregset (const struct regcache *regcache,
333 gdb_gregset_t *gregsetp, int regno)
337 for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++)
339 int mregno = greg_map[i];
341 if (regno == -1 || regno == mregno)
342 regcache->raw_collect (mregno, &(*gregsetp)[i]);
346 /* Given a pointer to a floating point register set in /proc format
347 (fpregset_t *), unpack the register contents and supply them as gdb's
348 idea of the current floating point register values. */
351 supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
356 for (regi = 0; regi <= 31; regi++)
358 from = (const char *) &((*fpregsetp)[regi]);
359 regcache->raw_supply (2*regi + HPPA_FP0_REGNUM, from);
360 regcache->raw_supply (2*regi + HPPA_FP0_REGNUM + 1, from + 4);
364 /* Given a pointer to a floating point register set in /proc format
365 (fpregset_t *), update the register specified by REGNO from gdb's idea
366 of the current floating point register set. If REGNO is -1, update
370 fill_fpregset (const struct regcache *regcache,
371 gdb_fpregset_t *fpregsetp, int regno)
375 for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++)
377 /* Gross. fpregset_t is double, registers[x] has single
379 char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]);
380 if ((i - HPPA_FP0_REGNUM) & 1)
382 regcache->raw_collect (i, to);
387 _initialize_hppa_linux_nat (void)
389 /* Register the target. */
390 linux_target = &the_hppa_linux_nat_target;
391 add_inf_child_target (&the_hppa_linux_nat_target);