1 /* Functions specific to running GDB native on HPPA running GNU/Linux.
3 Copyright (C) 2004-2015 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"
27 #include <sys/procfs.h>
28 #include "nat/gdb_ptrace.h"
29 #include <linux/version.h>
31 #include <asm/ptrace.h>
32 #include "hppa-linux-offsets.h"
34 #include "hppa-tdep.h"
36 /* Prototypes for supply_gregset etc. */
39 /* These must match the order of the register names.
41 Some sort of lookup table is needed because the offsets associated
42 with the registers are all over the board. */
44 static const int u_offsets
[] =
46 /* general registers */
115 /* Floating point regs. */
126 PT_FR10
, PT_FR10
+ 4,
127 PT_FR11
, PT_FR11
+ 4,
128 PT_FR12
, PT_FR12
+ 4,
129 PT_FR13
, PT_FR13
+ 4,
130 PT_FR14
, PT_FR14
+ 4,
131 PT_FR15
, PT_FR15
+ 4,
132 PT_FR16
, PT_FR16
+ 4,
133 PT_FR17
, PT_FR17
+ 4,
134 PT_FR18
, PT_FR18
+ 4,
135 PT_FR19
, PT_FR19
+ 4,
136 PT_FR20
, PT_FR20
+ 4,
137 PT_FR21
, PT_FR21
+ 4,
138 PT_FR22
, PT_FR22
+ 4,
139 PT_FR23
, PT_FR23
+ 4,
140 PT_FR24
, PT_FR24
+ 4,
141 PT_FR25
, PT_FR25
+ 4,
142 PT_FR26
, PT_FR26
+ 4,
143 PT_FR27
, PT_FR27
+ 4,
144 PT_FR28
, PT_FR28
+ 4,
145 PT_FR29
, PT_FR29
+ 4,
146 PT_FR30
, PT_FR30
+ 4,
147 PT_FR31
, PT_FR31
+ 4,
151 hppa_linux_register_addr (int regno
, CORE_ADDR blockend
)
155 if ((unsigned) regno
>= ARRAY_SIZE (u_offsets
))
156 error (_("Invalid register number %d."), regno
);
158 if (u_offsets
[regno
] == -1)
162 addr
= (CORE_ADDR
) u_offsets
[regno
];
169 * Registers saved in a coredump:
174 * sar, iir, isr, ior, ipsw
179 #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
180 #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
181 static const int greg_map
[] =
183 GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
184 GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
185 GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
186 GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
187 GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
188 GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
189 GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
190 GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
192 HPPA_SR4_REGNUM
+1, HPPA_SR4_REGNUM
+2, HPPA_SR4_REGNUM
+3, HPPA_SR4_REGNUM
+4,
193 HPPA_SR4_REGNUM
, HPPA_SR4_REGNUM
+5, HPPA_SR4_REGNUM
+6, HPPA_SR4_REGNUM
+7,
195 HPPA_PCOQ_HEAD_REGNUM
, HPPA_PCOQ_TAIL_REGNUM
,
196 HPPA_PCSQ_HEAD_REGNUM
, HPPA_PCSQ_TAIL_REGNUM
,
198 HPPA_SAR_REGNUM
, HPPA_IIR_REGNUM
, HPPA_ISR_REGNUM
, HPPA_IOR_REGNUM
,
199 HPPA_IPSW_REGNUM
, HPPA_RCR_REGNUM
,
201 TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
202 TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
204 HPPA_PID0_REGNUM
, HPPA_PID1_REGNUM
, HPPA_PID2_REGNUM
, HPPA_PID3_REGNUM
,
205 HPPA_CCR_REGNUM
, HPPA_EIEM_REGNUM
,
210 /* Fetch one register. */
213 fetch_register (struct regcache
*regcache
, int regno
)
215 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
219 if (gdbarch_cannot_fetch_register (gdbarch
, regno
))
221 regcache_raw_supply (regcache
, regno
, NULL
);
225 /* GNU/Linux LWP ID's are process ID's. */
226 tid
= ptid_get_lwp (inferior_ptid
);
228 tid
= ptid_get_pid (inferior_ptid
); /* Not a threaded program. */
231 val
= ptrace (PTRACE_PEEKUSER
, tid
, hppa_linux_register_addr (regno
, 0), 0);
233 error (_("Couldn't read register %s (#%d): %s."),
234 gdbarch_register_name (gdbarch
, regno
),
235 regno
, safe_strerror (errno
));
237 regcache_raw_supply (regcache
, regno
, &val
);
240 /* Store one register. */
243 store_register (const struct regcache
*regcache
, int regno
)
245 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
249 if (gdbarch_cannot_store_register (gdbarch
, regno
))
252 /* GNU/Linux LWP ID's are process ID's. */
253 tid
= ptid_get_lwp (inferior_ptid
);
255 tid
= ptid_get_pid (inferior_ptid
); /* Not a threaded program. */
258 regcache_raw_collect (regcache
, regno
, &val
);
259 ptrace (PTRACE_POKEUSER
, tid
, hppa_linux_register_addr (regno
, 0), val
);
261 error (_("Couldn't write register %s (#%d): %s."),
262 gdbarch_register_name (gdbarch
, regno
),
263 regno
, safe_strerror (errno
));
266 /* Fetch registers from the child process. Fetch all registers if
267 regno == -1, otherwise fetch all general registers or all floating
268 point registers depending upon the value of regno. */
271 hppa_linux_fetch_inferior_registers (struct target_ops
*ops
,
272 struct regcache
*regcache
, int regno
)
277 regno
< gdbarch_num_regs (get_regcache_arch (regcache
));
279 fetch_register (regcache
, regno
);
283 fetch_register (regcache
, regno
);
287 /* Store registers back into the inferior. Store all registers if
288 regno == -1, otherwise store all general registers or all floating
289 point registers depending upon the value of regno. */
292 hppa_linux_store_inferior_registers (struct target_ops
*ops
,
293 struct regcache
*regcache
, int regno
)
298 regno
< gdbarch_num_regs (get_regcache_arch (regcache
));
300 store_register (regcache
, regno
);
304 store_register (regcache
, regno
);
308 /* Fill GDB's register array with the general-purpose register values
312 supply_gregset (struct regcache
*regcache
, const gdb_gregset_t
*gregsetp
)
315 const greg_t
*regp
= (const elf_greg_t
*) gregsetp
;
317 for (i
= 0; i
< sizeof (greg_map
) / sizeof (greg_map
[0]); i
++, regp
++)
319 int regno
= greg_map
[i
];
320 regcache_raw_supply (regcache
, regno
, regp
);
324 /* Fill register regno (if it is a general-purpose register) in
325 *gregsetp with the appropriate value from GDB's register array.
326 If regno is -1, do this for all registers. */
329 fill_gregset (const struct regcache
*regcache
,
330 gdb_gregset_t
*gregsetp
, int regno
)
334 for (i
= 0; i
< sizeof (greg_map
) / sizeof (greg_map
[0]); i
++)
336 int mregno
= greg_map
[i
];
338 if (regno
== -1 || regno
== mregno
)
340 regcache_raw_collect(regcache
, mregno
, &(*gregsetp
)[i
]);
345 /* Given a pointer to a floating point register set in /proc format
346 (fpregset_t *), unpack the register contents and supply them as gdb's
347 idea of the current floating point register values. */
350 supply_fpregset (struct regcache
*regcache
, const gdb_fpregset_t
*fpregsetp
)
355 for (regi
= 0; regi
<= 31; regi
++)
357 from
= (const char *) &((*fpregsetp
)[regi
]);
358 regcache_raw_supply (regcache
, 2*regi
+ HPPA_FP0_REGNUM
, from
);
359 regcache_raw_supply (regcache
, 2*regi
+ HPPA_FP0_REGNUM
+ 1, from
+ 4);
363 /* Given a pointer to a floating point register set in /proc format
364 (fpregset_t *), update the register specified by REGNO from gdb's idea
365 of the current floating point register set. If REGNO is -1, update
369 fill_fpregset (const struct regcache
*regcache
,
370 gdb_fpregset_t
*fpregsetp
, int regno
)
374 for (i
= HPPA_FP0_REGNUM
; i
< HPPA_FP0_REGNUM
+ 32 * 2; i
++)
376 /* Gross. fpregset_t is double, registers[x] has single
378 char *to
= (char *) &((*fpregsetp
)[(i
- HPPA_FP0_REGNUM
) / 2]);
379 if ((i
- HPPA_FP0_REGNUM
) & 1)
381 regcache_raw_collect (regcache
, i
, to
);
385 void _initialize_hppa_linux_nat (void);
388 _initialize_hppa_linux_nat (void)
390 struct target_ops
*t
;
392 /* Fill in the generic GNU/Linux methods. */
395 /* Add our register access methods. */
396 t
->to_fetch_registers
= hppa_linux_fetch_inferior_registers
;
397 t
->to_store_registers
= hppa_linux_store_inferior_registers
;
399 /* Register the target. */
400 linux_nat_add_target (t
);