1 /* Functions specific to running GDB native on HPPA running GNU/Linux.
3 Copyright (C) 2004-2017 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 /* Prototypes for supply_gregset etc. */
40 /* These must match the order of the register names.
42 Some sort of lookup table is needed because the offsets associated
43 with the registers are all over the board. */
45 static const int u_offsets
[] =
47 /* general registers */
116 /* Floating point regs. */
127 PT_FR10
, PT_FR10
+ 4,
128 PT_FR11
, PT_FR11
+ 4,
129 PT_FR12
, PT_FR12
+ 4,
130 PT_FR13
, PT_FR13
+ 4,
131 PT_FR14
, PT_FR14
+ 4,
132 PT_FR15
, PT_FR15
+ 4,
133 PT_FR16
, PT_FR16
+ 4,
134 PT_FR17
, PT_FR17
+ 4,
135 PT_FR18
, PT_FR18
+ 4,
136 PT_FR19
, PT_FR19
+ 4,
137 PT_FR20
, PT_FR20
+ 4,
138 PT_FR21
, PT_FR21
+ 4,
139 PT_FR22
, PT_FR22
+ 4,
140 PT_FR23
, PT_FR23
+ 4,
141 PT_FR24
, PT_FR24
+ 4,
142 PT_FR25
, PT_FR25
+ 4,
143 PT_FR26
, PT_FR26
+ 4,
144 PT_FR27
, PT_FR27
+ 4,
145 PT_FR28
, PT_FR28
+ 4,
146 PT_FR29
, PT_FR29
+ 4,
147 PT_FR30
, PT_FR30
+ 4,
148 PT_FR31
, PT_FR31
+ 4,
152 hppa_linux_register_addr (int regno
, CORE_ADDR blockend
)
156 if ((unsigned) regno
>= ARRAY_SIZE (u_offsets
))
157 error (_("Invalid register number %d."), regno
);
159 if (u_offsets
[regno
] == -1)
163 addr
= (CORE_ADDR
) u_offsets
[regno
];
170 * Registers saved in a coredump:
175 * sar, iir, isr, ior, ipsw
180 #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
181 #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
182 static const int greg_map
[] =
184 GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
185 GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
186 GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
187 GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
188 GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
189 GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
190 GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
191 GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
193 HPPA_SR4_REGNUM
+1, HPPA_SR4_REGNUM
+2, HPPA_SR4_REGNUM
+3, HPPA_SR4_REGNUM
+4,
194 HPPA_SR4_REGNUM
, HPPA_SR4_REGNUM
+5, HPPA_SR4_REGNUM
+6, HPPA_SR4_REGNUM
+7,
196 HPPA_PCOQ_HEAD_REGNUM
, HPPA_PCOQ_TAIL_REGNUM
,
197 HPPA_PCSQ_HEAD_REGNUM
, HPPA_PCSQ_TAIL_REGNUM
,
199 HPPA_SAR_REGNUM
, HPPA_IIR_REGNUM
, HPPA_ISR_REGNUM
, HPPA_IOR_REGNUM
,
200 HPPA_IPSW_REGNUM
, HPPA_RCR_REGNUM
,
202 TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
203 TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
205 HPPA_PID0_REGNUM
, HPPA_PID1_REGNUM
, HPPA_PID2_REGNUM
, HPPA_PID3_REGNUM
,
206 HPPA_CCR_REGNUM
, HPPA_EIEM_REGNUM
,
211 /* Fetch one register. */
214 fetch_register (struct regcache
*regcache
, int regno
)
216 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
220 if (gdbarch_cannot_fetch_register (gdbarch
, regno
))
222 regcache_raw_supply (regcache
, regno
, NULL
);
226 tid
= get_ptrace_pid (regcache_get_ptid (regcache
));
229 val
= ptrace (PTRACE_PEEKUSER
, tid
, hppa_linux_register_addr (regno
, 0), 0);
231 error (_("Couldn't read register %s (#%d): %s."),
232 gdbarch_register_name (gdbarch
, regno
),
233 regno
, safe_strerror (errno
));
235 regcache_raw_supply (regcache
, regno
, &val
);
238 /* Store one register. */
241 store_register (const struct regcache
*regcache
, int regno
)
243 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
247 if (gdbarch_cannot_store_register (gdbarch
, regno
))
250 tid
= get_ptrace_pid (regcache_get_ptid (regcache
));
253 regcache_raw_collect (regcache
, regno
, &val
);
254 ptrace (PTRACE_POKEUSER
, tid
, hppa_linux_register_addr (regno
, 0), val
);
256 error (_("Couldn't write register %s (#%d): %s."),
257 gdbarch_register_name (gdbarch
, regno
),
258 regno
, safe_strerror (errno
));
261 /* Fetch registers from the child process. Fetch all registers if
262 regno == -1, otherwise fetch all general registers or all floating
263 point registers depending upon the value of regno. */
266 hppa_linux_fetch_inferior_registers (struct target_ops
*ops
,
267 struct regcache
*regcache
, int regno
)
272 regno
< gdbarch_num_regs (get_regcache_arch (regcache
));
274 fetch_register (regcache
, regno
);
278 fetch_register (regcache
, regno
);
282 /* Store registers back into the inferior. Store all registers if
283 regno == -1, otherwise store all general registers or all floating
284 point registers depending upon the value of regno. */
287 hppa_linux_store_inferior_registers (struct target_ops
*ops
,
288 struct regcache
*regcache
, int regno
)
293 regno
< gdbarch_num_regs (get_regcache_arch (regcache
));
295 store_register (regcache
, regno
);
299 store_register (regcache
, regno
);
303 /* Fill GDB's register array with the general-purpose register values
307 supply_gregset (struct regcache
*regcache
, const gdb_gregset_t
*gregsetp
)
310 const greg_t
*regp
= (const elf_greg_t
*) gregsetp
;
312 for (i
= 0; i
< sizeof (greg_map
) / sizeof (greg_map
[0]); i
++, regp
++)
314 int regno
= greg_map
[i
];
315 regcache_raw_supply (regcache
, regno
, regp
);
319 /* Fill register regno (if it is a general-purpose register) in
320 *gregsetp with the appropriate value from GDB's register array.
321 If regno is -1, do this for all registers. */
324 fill_gregset (const struct regcache
*regcache
,
325 gdb_gregset_t
*gregsetp
, int regno
)
329 for (i
= 0; i
< sizeof (greg_map
) / sizeof (greg_map
[0]); i
++)
331 int mregno
= greg_map
[i
];
333 if (regno
== -1 || regno
== mregno
)
335 regcache_raw_collect(regcache
, mregno
, &(*gregsetp
)[i
]);
340 /* Given a pointer to a floating point register set in /proc format
341 (fpregset_t *), unpack the register contents and supply them as gdb's
342 idea of the current floating point register values. */
345 supply_fpregset (struct regcache
*regcache
, const gdb_fpregset_t
*fpregsetp
)
350 for (regi
= 0; regi
<= 31; regi
++)
352 from
= (const char *) &((*fpregsetp
)[regi
]);
353 regcache_raw_supply (regcache
, 2*regi
+ HPPA_FP0_REGNUM
, from
);
354 regcache_raw_supply (regcache
, 2*regi
+ HPPA_FP0_REGNUM
+ 1, from
+ 4);
358 /* Given a pointer to a floating point register set in /proc format
359 (fpregset_t *), update the register specified by REGNO from gdb's idea
360 of the current floating point register set. If REGNO is -1, update
364 fill_fpregset (const struct regcache
*regcache
,
365 gdb_fpregset_t
*fpregsetp
, int regno
)
369 for (i
= HPPA_FP0_REGNUM
; i
< HPPA_FP0_REGNUM
+ 32 * 2; i
++)
371 /* Gross. fpregset_t is double, registers[x] has single
373 char *to
= (char *) &((*fpregsetp
)[(i
- HPPA_FP0_REGNUM
) / 2]);
374 if ((i
- HPPA_FP0_REGNUM
) & 1)
376 regcache_raw_collect (regcache
, i
, to
);
381 _initialize_hppa_linux_nat (void)
383 struct target_ops
*t
;
385 /* Fill in the generic GNU/Linux methods. */
388 /* Add our register access methods. */
389 t
->to_fetch_registers
= hppa_linux_fetch_inferior_registers
;
390 t
->to_store_registers
= hppa_linux_store_inferior_registers
;
392 /* Register the target. */
393 linux_nat_add_target (t
);