1 /* Functions specific to running GDB native on HPPA running GNU/Linux.
3 Copyright (C) 2004, 2005, 2006, 2007 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/>. */
23 #include "gdb_string.h"
26 #include "linux-nat.h"
28 #include <sys/procfs.h>
29 #include <sys/ptrace.h>
30 #include <linux/version.h>
32 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,43)
33 #include <asm/offset.h>
35 #include <asm/offsets.h>
38 #include "hppa-tdep.h"
40 /* Prototypes for supply_gregset etc. */
43 /* These must match the order of the register names.
45 Some sort of lookup table is needed because the offsets associated
46 with the registers are all over the board. */
48 static const int u_offsets
[] =
50 /* general registers */
119 /* Floating point regs. */
130 PT_FR10
, PT_FR10
+ 4,
131 PT_FR11
, PT_FR11
+ 4,
132 PT_FR12
, PT_FR12
+ 4,
133 PT_FR13
, PT_FR13
+ 4,
134 PT_FR14
, PT_FR14
+ 4,
135 PT_FR15
, PT_FR15
+ 4,
136 PT_FR16
, PT_FR16
+ 4,
137 PT_FR17
, PT_FR17
+ 4,
138 PT_FR18
, PT_FR18
+ 4,
139 PT_FR19
, PT_FR19
+ 4,
140 PT_FR20
, PT_FR20
+ 4,
141 PT_FR21
, PT_FR21
+ 4,
142 PT_FR22
, PT_FR22
+ 4,
143 PT_FR23
, PT_FR23
+ 4,
144 PT_FR24
, PT_FR24
+ 4,
145 PT_FR25
, PT_FR25
+ 4,
146 PT_FR26
, PT_FR26
+ 4,
147 PT_FR27
, PT_FR27
+ 4,
148 PT_FR28
, PT_FR28
+ 4,
149 PT_FR29
, PT_FR29
+ 4,
150 PT_FR30
, PT_FR30
+ 4,
151 PT_FR31
, PT_FR31
+ 4,
155 hppa_linux_register_addr (int regno
, CORE_ADDR blockend
)
159 if ((unsigned) regno
>= gdbarch_num_regs (current_gdbarch
))
160 error (_("Invalid register number %d."), regno
);
162 if (u_offsets
[regno
] == -1)
166 addr
= (CORE_ADDR
) u_offsets
[regno
];
173 * Registers saved in a coredump:
178 * sar, iir, isr, ior, ipsw
183 #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
184 #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
185 static const int greg_map
[] =
187 GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
188 GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
189 GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
190 GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
191 GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
192 GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
193 GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
194 GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
196 HPPA_SR4_REGNUM
+1, HPPA_SR4_REGNUM
+2, HPPA_SR4_REGNUM
+3, HPPA_SR4_REGNUM
+4,
197 HPPA_SR4_REGNUM
, HPPA_SR4_REGNUM
+5, HPPA_SR4_REGNUM
+6, HPPA_SR4_REGNUM
+7,
199 HPPA_PCOQ_HEAD_REGNUM
, HPPA_PCOQ_TAIL_REGNUM
,
200 HPPA_PCSQ_HEAD_REGNUM
, HPPA_PCSQ_TAIL_REGNUM
,
202 HPPA_SAR_REGNUM
, HPPA_IIR_REGNUM
, HPPA_ISR_REGNUM
, HPPA_IOR_REGNUM
,
203 HPPA_IPSW_REGNUM
, HPPA_RCR_REGNUM
,
205 TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
206 TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
208 HPPA_PID0_REGNUM
, HPPA_PID1_REGNUM
, HPPA_PID2_REGNUM
, HPPA_PID3_REGNUM
,
209 HPPA_CCR_REGNUM
, HPPA_EIEM_REGNUM
,
214 /* Fetch one register. */
217 fetch_register (struct regcache
*regcache
, int regno
)
219 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
223 if (gdbarch_cannot_fetch_register (gdbarch
, regno
))
225 regcache_raw_supply (regcache
, regno
, NULL
);
229 /* GNU/Linux LWP ID's are process ID's. */
230 tid
= TIDGET (inferior_ptid
);
232 tid
= PIDGET (inferior_ptid
); /* Not a threaded program. */
235 val
= ptrace (PTRACE_PEEKUSER
, tid
, hppa_linux_register_addr (regno
, 0), 0);
237 error (_("Couldn't read register %s (#%d): %s."),
238 gdbarch_register_name (gdbarch
, regno
),
239 regno
, safe_strerror (errno
));
241 regcache_raw_supply (regcache
, regno
, &val
);
244 /* Store one register. */
247 store_register (const struct regcache
*regcache
, int regno
)
249 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
253 if (gdbarch_cannot_store_register (gdbarch
, regno
))
256 /* GNU/Linux LWP ID's are process ID's. */
257 tid
= TIDGET (inferior_ptid
);
259 tid
= PIDGET (inferior_ptid
); /* Not a threaded program. */
262 regcache_raw_collect (regcache
, regno
, &val
);
263 ptrace (PTRACE_POKEUSER
, tid
, hppa_linux_register_addr (regno
, 0), val
);
265 error (_("Couldn't write register %s (#%d): %s."),
266 gdbarch_register_name (gdbarch
, regno
),
267 regno
, safe_strerror (errno
));
270 /* Fetch registers from the child process. Fetch all registers if
271 regno == -1, otherwise fetch all general registers or all floating
272 point registers depending upon the value of regno. */
275 hppa_linux_fetch_inferior_registers (struct regcache
*regcache
, int regno
)
280 regno
< gdbarch_num_regs (get_regcache_arch (regcache
));
282 fetch_register (regcache
, regno
);
286 fetch_register (regcache
, regno
);
290 /* Store registers back into the inferior. Store all registers if
291 regno == -1, otherwise store all general registers or all floating
292 point registers depending upon the value of regno. */
295 hppa_linux_store_inferior_registers (struct regcache
*regcache
, int regno
)
300 regno
< gdbarch_num_regs (get_regcache_arch (regcache
));
302 store_register (regcache
, regno
);
306 store_register (regcache
, regno
);
310 /* Fill GDB's register array with the general-purpose register values
314 supply_gregset (struct regcache
*regcache
, const gdb_gregset_t
*gregsetp
)
317 const greg_t
*regp
= (const elf_greg_t
*) gregsetp
;
319 for (i
= 0; i
< sizeof (greg_map
) / sizeof (greg_map
[0]); i
++, regp
++)
321 int regno
= greg_map
[i
];
322 regcache_raw_supply (regcache
, regno
, regp
);
326 /* Fill register regno (if it is a general-purpose register) in
327 *gregsetp with the appropriate value from GDB's register array.
328 If regno is -1, do this for all registers. */
331 fill_gregset (const struct regcache
*regcache
,
332 gdb_gregset_t
*gregsetp
, int regno
)
336 for (i
= 0; i
< sizeof (greg_map
) / sizeof (greg_map
[0]); i
++)
338 int mregno
= greg_map
[i
];
340 if (regno
== -1 || regno
== mregno
)
342 regcache_raw_collect(regcache
, mregno
, &(*gregsetp
)[i
]);
347 /* Given a pointer to a floating point register set in /proc format
348 (fpregset_t *), unpack the register contents and supply them as gdb's
349 idea of the current floating point register values. */
352 supply_fpregset (struct regcache
*regcache
, const gdb_fpregset_t
*fpregsetp
)
357 for (regi
= 0; regi
<= 31; regi
++)
359 from
= (const char *) &((*fpregsetp
)[regi
]);
360 regcache_raw_supply (regcache
, 2*regi
+ HPPA_FP0_REGNUM
, from
);
361 regcache_raw_supply (regcache
, 2*regi
+ HPPA_FP0_REGNUM
+ 1, from
+ 4);
365 /* Given a pointer to a floating point register set in /proc format
366 (fpregset_t *), update the register specified by REGNO from gdb's idea
367 of the current floating point register set. If REGNO is -1, update
371 fill_fpregset (const struct regcache
*regcache
,
372 gdb_fpregset_t
*fpregsetp
, int regno
)
376 for (i
= HPPA_FP0_REGNUM
; i
< HPPA_FP0_REGNUM
+ 32 * 2; i
++)
378 /* Gross. fpregset_t is double, registers[x] has single
380 char *to
= (char *) &((*fpregsetp
)[(i
- HPPA_FP0_REGNUM
) / 2]);
381 if ((i
- HPPA_FP0_REGNUM
) & 1)
383 regcache_raw_collect (regcache
, i
, to
);
387 void _initialize_hppa_linux_nat (void);
390 _initialize_hppa_linux_nat (void)
392 struct target_ops
*t
;
394 /* Fill in the generic GNU/Linux methods. */
397 /* Add our register access methods. */
398 t
->to_fetch_registers
= hppa_linux_fetch_inferior_registers
;
399 t
->to_store_registers
= hppa_linux_store_inferior_registers
;
401 /* Register the target. */
402 linux_nat_add_target (t
);