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
,
100 supply_gregset_reg (struct regcache
*regcache
,
101 const gdb_gregset_t
*gregsetp
, int regnum
)
104 xtensa_elf_gregset_t
*regs
= (xtensa_elf_gregset_t
*) gregsetp
;
106 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
108 if (regnum
== gdbarch_pc_regnum (gdbarch
) || regnum
== -1)
109 regcache_raw_supply (regcache
, gdbarch_pc_regnum (gdbarch
), ®s
->pc
);
110 if (regnum
== gdbarch_ps_regnum (gdbarch
) || regnum
== -1)
111 regcache_raw_supply (regcache
, gdbarch_ps_regnum (gdbarch
), ®s
->ps
);
113 if (regnum
== gdbarch_tdep (gdbarch
)->wb_regnum
|| regnum
== -1)
114 regcache_raw_supply (regcache
,
115 gdbarch_tdep (gdbarch
)->wb_regnum
,
117 if (regnum
== gdbarch_tdep (gdbarch
)->ws_regnum
|| regnum
== -1)
118 regcache_raw_supply (regcache
,
119 gdbarch_tdep (gdbarch
)->ws_regnum
,
121 if (regnum
== gdbarch_tdep (gdbarch
)->lbeg_regnum
|| regnum
== -1)
122 regcache_raw_supply (regcache
,
123 gdbarch_tdep (gdbarch
)->lbeg_regnum
,
125 if (regnum
== gdbarch_tdep (gdbarch
)->lend_regnum
|| regnum
== -1)
126 regcache_raw_supply (regcache
,
127 gdbarch_tdep (gdbarch
)->lend_regnum
,
129 if (regnum
== gdbarch_tdep (gdbarch
)->lcount_regnum
|| regnum
== -1)
130 regcache_raw_supply (regcache
,
131 gdbarch_tdep (gdbarch
)->lcount_regnum
,
133 if (regnum
== gdbarch_tdep (gdbarch
)->sar_regnum
|| regnum
== -1)
134 regcache_raw_supply (regcache
,
135 gdbarch_tdep (gdbarch
)->sar_regnum
,
137 if (regnum
>=gdbarch_tdep (gdbarch
)->ar_base
138 && regnum
< gdbarch_tdep (gdbarch
)->ar_base
139 + gdbarch_tdep (gdbarch
)->num_aregs
)
140 regcache_raw_supply (regcache
,regnum
,
141 ®s
->ar
[regnum
- gdbarch_tdep (gdbarch
)->ar_base
]);
142 else if (regnum
== -1)
144 for (i
= 0; i
< gdbarch_tdep (gdbarch
)->num_aregs
; ++i
)
145 regcache_raw_supply (regcache
,
146 gdbarch_tdep (gdbarch
)->ar_base
+ i
,
152 supply_gregset (struct regcache
*regcache
, const gdb_gregset_t
*gregsetp
)
154 supply_gregset_reg (regcache
, gregsetp
, -1);
158 fill_fpregset (const struct regcache
*regcache
,
159 gdb_fpregset_t
*fpregsetp
, int regnum
)
165 supply_fpregset (struct regcache
*regcache
,
166 const gdb_fpregset_t
*fpregsetp
)
171 /* Fetch greg-register(s) from process/thread TID
172 and store value(s) in GDB's register array. */
175 fetch_gregs (struct regcache
*regcache
, int regnum
)
177 int tid
= ptid_get_lwp (inferior_ptid
);
181 if (ptrace (PTRACE_GETREGS
, tid
, 0, (long) ®s
) < 0)
183 perror_with_name (_("Couldn't get registers"));
187 supply_gregset_reg (regcache
, ®s
, regnum
);
190 /* Store greg-register(s) in GDB's register
191 array into the process/thread specified by TID. */
194 store_gregs (struct regcache
*regcache
, int regnum
)
196 int tid
= ptid_get_lwp (inferior_ptid
);
200 if (ptrace (PTRACE_GETREGS
, tid
, 0, (long) ®s
) < 0)
202 perror_with_name (_("Couldn't get registers"));
206 fill_gregset (regcache
, ®s
, regnum
);
208 if (ptrace (PTRACE_SETREGS
, tid
, 0, (long) ®s
) < 0)
210 perror_with_name (_("Couldn't write registers"));
216 static int xtreg_high
;
218 /* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE
219 interface provides special requests for this. */
222 fetch_xtregs (struct regcache
*regcache
, int regnum
)
224 int tid
= ptid_get_lwp (inferior_ptid
);
225 const xtensa_regtable_t
*ptr
;
226 char xtregs
[XTENSA_ELF_XTREG_SIZE
];
228 if (ptrace (PTRACE_GETXTREGS
, tid
, 0, (long)&xtregs
) < 0)
229 perror_with_name (_("Couldn't get extended registers"));
231 for (ptr
= xtensa_regmap_table
; ptr
->name
; ptr
++)
232 if (regnum
== ptr
->gdb_regnum
|| regnum
== -1)
233 regcache_raw_supply (regcache
, ptr
->gdb_regnum
,
234 xtregs
+ ptr
->ptrace_offset
);
238 store_xtregs (struct regcache
*regcache
, int regnum
)
240 int tid
= ptid_get_lwp (inferior_ptid
);
241 const xtensa_regtable_t
*ptr
;
242 char xtregs
[XTENSA_ELF_XTREG_SIZE
];
244 if (ptrace (PTRACE_GETXTREGS
, tid
, 0, (long)&xtregs
) < 0)
245 perror_with_name (_("Couldn't get extended registers"));
247 for (ptr
= xtensa_regmap_table
; ptr
->name
; ptr
++)
248 if (regnum
== ptr
->gdb_regnum
|| regnum
== -1)
249 regcache_raw_collect (regcache
, ptr
->gdb_regnum
,
250 xtregs
+ ptr
->ptrace_offset
);
252 if (ptrace (PTRACE_SETXTREGS
, tid
, 0, (long)&xtregs
) < 0)
253 perror_with_name (_("Couldn't write extended registers"));
257 xtensa_linux_fetch_inferior_registers (struct target_ops
*ops
,
258 struct regcache
*regcache
, int regnum
)
262 fetch_gregs (regcache
, regnum
);
263 fetch_xtregs (regcache
, regnum
);
265 else if ((regnum
< xtreg_lo
) || (regnum
> xtreg_high
))
266 fetch_gregs (regcache
, regnum
);
268 fetch_xtregs (regcache
, regnum
);
272 xtensa_linux_store_inferior_registers (struct target_ops
*ops
,
273 struct regcache
*regcache
, int regnum
)
277 store_gregs (regcache
, regnum
);
278 store_xtregs (regcache
, regnum
);
280 else if ((regnum
< xtreg_lo
) || (regnum
> xtreg_high
))
281 store_gregs (regcache
, regnum
);
283 store_xtregs (regcache
, regnum
);
286 /* Called by libthread_db. */
289 ps_get_thread_area (struct ps_prochandle
*ph
,
290 lwpid_t lwpid
, int idx
, void **base
)
292 xtensa_elf_gregset_t regs
;
294 if (ptrace (PTRACE_GETREGS
, lwpid
, NULL
, ®s
) != 0)
297 /* IDX is the bias from the thread pointer to the beginning of the
298 thread descriptor. It has to be subtracted due to implementation
299 quirks in libthread_db. */
300 *base
= (void *) ((char *) regs
.threadptr
- idx
);
305 void _initialize_xtensa_linux_nat (void);
308 _initialize_xtensa_linux_nat (void)
310 struct target_ops
*t
;
311 const xtensa_regtable_t
*ptr
;
313 /* Calculate the number range for extended registers. */
314 xtreg_lo
= 1000000000;
316 for (ptr
= xtensa_regmap_table
; ptr
->name
; ptr
++)
318 if (ptr
->gdb_regnum
< xtreg_lo
)
319 xtreg_lo
= ptr
->gdb_regnum
;
320 if (ptr
->gdb_regnum
> xtreg_high
)
321 xtreg_high
= ptr
->gdb_regnum
;
324 /* Fill in the generic GNU/Linux methods. */
327 /* Add our register access methods. */
328 t
->to_fetch_registers
= xtensa_linux_fetch_inferior_registers
;
329 t
->to_store_registers
= xtensa_linux_store_inferior_registers
;
331 linux_nat_add_target (t
);