1 /* Xtensa GNU/Linux native support.
3 Copyright (C) 2007-2017 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/>. */
26 #include "linux-nat.h"
27 #include <sys/types.h>
30 #include <sys/ioctl.h>
33 #include <sys/procfs.h>
34 #include "nat/gdb_ptrace.h"
35 #include <asm/ptrace.h>
38 #include "xtensa-tdep.h"
40 /* Defines ps_err_e, struct ps_prochandle. */
41 #include "gdb_proc_service.h"
43 /* Extended register set depends on hardware configs.
44 Keeping these definitions separately allows to introduce
45 hardware-specific overlays. */
46 #include "xtensa-xtregs.c"
49 fill_gregset (const struct regcache
*regcache
,
50 gdb_gregset_t
*gregsetp
, int regnum
)
53 xtensa_elf_gregset_t
*regs
= (xtensa_elf_gregset_t
*) gregsetp
;
54 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
56 if (regnum
== gdbarch_pc_regnum (gdbarch
) || regnum
== -1)
57 regcache_raw_collect (regcache
, gdbarch_pc_regnum (gdbarch
), ®s
->pc
);
58 if (regnum
== gdbarch_ps_regnum (gdbarch
) || regnum
== -1)
59 regcache_raw_collect (regcache
, gdbarch_ps_regnum (gdbarch
), ®s
->ps
);
61 if (regnum
== gdbarch_tdep (gdbarch
)->wb_regnum
|| regnum
== -1)
62 regcache_raw_collect (regcache
,
63 gdbarch_tdep (gdbarch
)->wb_regnum
,
65 if (regnum
== gdbarch_tdep (gdbarch
)->ws_regnum
|| regnum
== -1)
66 regcache_raw_collect (regcache
,
67 gdbarch_tdep (gdbarch
)->ws_regnum
,
69 if (regnum
== gdbarch_tdep (gdbarch
)->lbeg_regnum
|| regnum
== -1)
70 regcache_raw_collect (regcache
,
71 gdbarch_tdep (gdbarch
)->lbeg_regnum
,
73 if (regnum
== gdbarch_tdep (gdbarch
)->lend_regnum
|| regnum
== -1)
74 regcache_raw_collect (regcache
,
75 gdbarch_tdep (gdbarch
)->lend_regnum
,
77 if (regnum
== gdbarch_tdep (gdbarch
)->lcount_regnum
|| regnum
== -1)
78 regcache_raw_collect (regcache
,
79 gdbarch_tdep (gdbarch
)->lcount_regnum
,
81 if (regnum
== gdbarch_tdep (gdbarch
)->sar_regnum
|| regnum
== -1)
82 regcache_raw_collect (regcache
,
83 gdbarch_tdep (gdbarch
)->sar_regnum
,
85 if (regnum
>=gdbarch_tdep (gdbarch
)->ar_base
86 && regnum
< gdbarch_tdep (gdbarch
)->ar_base
87 + gdbarch_tdep (gdbarch
)->num_aregs
)
88 regcache_raw_collect (regcache
,regnum
,
89 ®s
->ar
[regnum
- gdbarch_tdep (gdbarch
)->ar_base
]);
90 else if (regnum
== -1)
92 for (i
= 0; i
< gdbarch_tdep (gdbarch
)->num_aregs
; ++i
)
93 regcache_raw_collect (regcache
,
94 gdbarch_tdep (gdbarch
)->ar_base
+ i
,
97 if (regnum
>= gdbarch_tdep (gdbarch
)->a0_base
98 && regnum
< gdbarch_tdep (gdbarch
)->a0_base
+ C0_NREGS
)
99 regcache_raw_collect (regcache
, regnum
,
100 ®s
->ar
[(4 * regs
->windowbase
+ regnum
101 - gdbarch_tdep (gdbarch
)->a0_base
)
102 % gdbarch_tdep (gdbarch
)->num_aregs
]);
103 else if (regnum
== -1)
105 for (i
= 0; i
< C0_NREGS
; ++i
)
106 regcache_raw_collect (regcache
,
107 gdbarch_tdep (gdbarch
)->a0_base
+ i
,
108 ®s
->ar
[(4 * regs
->windowbase
+ i
)
109 % gdbarch_tdep (gdbarch
)->num_aregs
]);
114 supply_gregset_reg (struct regcache
*regcache
,
115 const gdb_gregset_t
*gregsetp
, int regnum
)
118 xtensa_elf_gregset_t
*regs
= (xtensa_elf_gregset_t
*) gregsetp
;
120 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
122 if (regnum
== gdbarch_pc_regnum (gdbarch
) || regnum
== -1)
123 regcache_raw_supply (regcache
, gdbarch_pc_regnum (gdbarch
), ®s
->pc
);
124 if (regnum
== gdbarch_ps_regnum (gdbarch
) || regnum
== -1)
125 regcache_raw_supply (regcache
, gdbarch_ps_regnum (gdbarch
), ®s
->ps
);
127 if (regnum
== gdbarch_tdep (gdbarch
)->wb_regnum
|| regnum
== -1)
128 regcache_raw_supply (regcache
,
129 gdbarch_tdep (gdbarch
)->wb_regnum
,
131 if (regnum
== gdbarch_tdep (gdbarch
)->ws_regnum
|| regnum
== -1)
132 regcache_raw_supply (regcache
,
133 gdbarch_tdep (gdbarch
)->ws_regnum
,
135 if (regnum
== gdbarch_tdep (gdbarch
)->lbeg_regnum
|| regnum
== -1)
136 regcache_raw_supply (regcache
,
137 gdbarch_tdep (gdbarch
)->lbeg_regnum
,
139 if (regnum
== gdbarch_tdep (gdbarch
)->lend_regnum
|| regnum
== -1)
140 regcache_raw_supply (regcache
,
141 gdbarch_tdep (gdbarch
)->lend_regnum
,
143 if (regnum
== gdbarch_tdep (gdbarch
)->lcount_regnum
|| regnum
== -1)
144 regcache_raw_supply (regcache
,
145 gdbarch_tdep (gdbarch
)->lcount_regnum
,
147 if (regnum
== gdbarch_tdep (gdbarch
)->sar_regnum
|| regnum
== -1)
148 regcache_raw_supply (regcache
,
149 gdbarch_tdep (gdbarch
)->sar_regnum
,
151 if (regnum
>=gdbarch_tdep (gdbarch
)->ar_base
152 && regnum
< gdbarch_tdep (gdbarch
)->ar_base
153 + gdbarch_tdep (gdbarch
)->num_aregs
)
154 regcache_raw_supply (regcache
,regnum
,
155 ®s
->ar
[regnum
- gdbarch_tdep (gdbarch
)->ar_base
]);
156 else if (regnum
== -1)
158 for (i
= 0; i
< gdbarch_tdep (gdbarch
)->num_aregs
; ++i
)
159 regcache_raw_supply (regcache
,
160 gdbarch_tdep (gdbarch
)->ar_base
+ i
,
163 if (regnum
>= gdbarch_tdep (gdbarch
)->a0_base
164 && regnum
< gdbarch_tdep (gdbarch
)->a0_base
+ C0_NREGS
)
165 regcache_raw_supply (regcache
, regnum
,
166 ®s
->ar
[(4 * regs
->windowbase
+ regnum
167 - gdbarch_tdep (gdbarch
)->a0_base
)
168 % gdbarch_tdep (gdbarch
)->num_aregs
]);
169 else if (regnum
== -1)
171 for (i
= 0; i
< C0_NREGS
; ++i
)
172 regcache_raw_supply (regcache
,
173 gdbarch_tdep (gdbarch
)->a0_base
+ i
,
174 ®s
->ar
[(4 * regs
->windowbase
+ i
)
175 % gdbarch_tdep (gdbarch
)->num_aregs
]);
180 supply_gregset (struct regcache
*regcache
, const gdb_gregset_t
*gregsetp
)
182 supply_gregset_reg (regcache
, gregsetp
, -1);
186 fill_fpregset (const struct regcache
*regcache
,
187 gdb_fpregset_t
*fpregsetp
, int regnum
)
193 supply_fpregset (struct regcache
*regcache
,
194 const gdb_fpregset_t
*fpregsetp
)
199 /* Fetch greg-register(s) from process/thread TID
200 and store value(s) in GDB's register array. */
203 fetch_gregs (struct regcache
*regcache
, int regnum
)
205 int tid
= ptid_get_lwp (regcache_get_ptid (regcache
));
209 if (ptrace (PTRACE_GETREGS
, tid
, 0, (long) ®s
) < 0)
211 perror_with_name (_("Couldn't get registers"));
215 supply_gregset_reg (regcache
, ®s
, regnum
);
218 /* Store greg-register(s) in GDB's register
219 array into the process/thread specified by TID. */
222 store_gregs (struct regcache
*regcache
, int regnum
)
224 int tid
= ptid_get_lwp (regcache_get_ptid (regcache
));
228 if (ptrace (PTRACE_GETREGS
, tid
, 0, (long) ®s
) < 0)
230 perror_with_name (_("Couldn't get registers"));
234 fill_gregset (regcache
, ®s
, regnum
);
236 if (ptrace (PTRACE_SETREGS
, tid
, 0, (long) ®s
) < 0)
238 perror_with_name (_("Couldn't write registers"));
244 static int xtreg_high
;
246 /* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE
247 interface provides special requests for this. */
250 fetch_xtregs (struct regcache
*regcache
, int regnum
)
252 int tid
= ptid_get_lwp (regcache_get_ptid (regcache
));
253 const xtensa_regtable_t
*ptr
;
254 char xtregs
[XTENSA_ELF_XTREG_SIZE
];
256 if (ptrace (PTRACE_GETXTREGS
, tid
, 0, (long)&xtregs
) < 0)
257 perror_with_name (_("Couldn't get extended registers"));
259 for (ptr
= xtensa_regmap_table
; ptr
->name
; ptr
++)
260 if (regnum
== ptr
->gdb_regnum
|| regnum
== -1)
261 regcache_raw_supply (regcache
, ptr
->gdb_regnum
,
262 xtregs
+ ptr
->ptrace_offset
);
266 store_xtregs (struct regcache
*regcache
, int regnum
)
268 int tid
= ptid_get_lwp (regcache_get_ptid (regcache
));
269 const xtensa_regtable_t
*ptr
;
270 char xtregs
[XTENSA_ELF_XTREG_SIZE
];
272 if (ptrace (PTRACE_GETXTREGS
, tid
, 0, (long)&xtregs
) < 0)
273 perror_with_name (_("Couldn't get extended registers"));
275 for (ptr
= xtensa_regmap_table
; ptr
->name
; ptr
++)
276 if (regnum
== ptr
->gdb_regnum
|| regnum
== -1)
277 regcache_raw_collect (regcache
, ptr
->gdb_regnum
,
278 xtregs
+ ptr
->ptrace_offset
);
280 if (ptrace (PTRACE_SETXTREGS
, tid
, 0, (long)&xtregs
) < 0)
281 perror_with_name (_("Couldn't write extended registers"));
285 xtensa_linux_fetch_inferior_registers (struct target_ops
*ops
,
286 struct regcache
*regcache
, int regnum
)
290 fetch_gregs (regcache
, regnum
);
291 fetch_xtregs (regcache
, regnum
);
293 else if ((regnum
< xtreg_lo
) || (regnum
> xtreg_high
))
294 fetch_gregs (regcache
, regnum
);
296 fetch_xtregs (regcache
, regnum
);
300 xtensa_linux_store_inferior_registers (struct target_ops
*ops
,
301 struct regcache
*regcache
, int regnum
)
305 store_gregs (regcache
, regnum
);
306 store_xtregs (regcache
, regnum
);
308 else if ((regnum
< xtreg_lo
) || (regnum
> xtreg_high
))
309 store_gregs (regcache
, regnum
);
311 store_xtregs (regcache
, regnum
);
314 /* Called by libthread_db. */
317 ps_get_thread_area (struct ps_prochandle
*ph
,
318 lwpid_t lwpid
, int idx
, void **base
)
320 xtensa_elf_gregset_t regs
;
322 if (ptrace (PTRACE_GETREGS
, lwpid
, NULL
, ®s
) != 0)
325 /* IDX is the bias from the thread pointer to the beginning of the
326 thread descriptor. It has to be subtracted due to implementation
327 quirks in libthread_db. */
328 *base
= (void *) ((char *) regs
.threadptr
- idx
);
333 void _initialize_xtensa_linux_nat (void);
336 _initialize_xtensa_linux_nat (void)
338 struct target_ops
*t
;
339 const xtensa_regtable_t
*ptr
;
341 /* Calculate the number range for extended registers. */
342 xtreg_lo
= 1000000000;
344 for (ptr
= xtensa_regmap_table
; ptr
->name
; ptr
++)
346 if (ptr
->gdb_regnum
< xtreg_lo
)
347 xtreg_lo
= ptr
->gdb_regnum
;
348 if (ptr
->gdb_regnum
> xtreg_high
)
349 xtreg_high
= ptr
->gdb_regnum
;
352 /* Fill in the generic GNU/Linux methods. */
355 /* Add our register access methods. */
356 t
->to_fetch_registers
= xtensa_linux_fetch_inferior_registers
;
357 t
->to_store_registers
= xtensa_linux_store_inferior_registers
;
359 linux_nat_add_target (t
);