1 /* Xtensa GNU/Linux native support.
3 Copyright (C) 2007-2016 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);
178 const gdb_gregset_t regs;
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);