1 /* Xtensa GNU/Linux native support.
3 Copyright (C) 2007-2015 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 /* Extended register set depends on hardware configs.
41 Keeping these definitions separately allows to introduce
42 hardware-specific overlays. */
43 #include "xtensa-xtregs.c"
46 get_thread_id (ptid_t ptid)
48 int tid = ptid_get_lwp (ptid);
50 tid = ptid_get_pid (ptid);
53 #define GET_THREAD_ID(PTID) get_thread_id (PTID)
56 fill_gregset (const struct regcache *regcache,
57 gdb_gregset_t *gregsetp, int regnum)
60 xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
61 struct gdbarch *gdbarch = get_regcache_arch (regcache);
63 if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
64 regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc);
65 if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
66 regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
68 if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
69 regcache_raw_collect (regcache,
70 gdbarch_tdep (gdbarch)->wb_regnum,
72 if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
73 regcache_raw_collect (regcache,
74 gdbarch_tdep (gdbarch)->ws_regnum,
76 if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
77 regcache_raw_collect (regcache,
78 gdbarch_tdep (gdbarch)->lbeg_regnum,
80 if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
81 regcache_raw_collect (regcache,
82 gdbarch_tdep (gdbarch)->lend_regnum,
84 if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
85 regcache_raw_collect (regcache,
86 gdbarch_tdep (gdbarch)->lcount_regnum,
88 if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
89 regcache_raw_collect (regcache,
90 gdbarch_tdep (gdbarch)->sar_regnum,
92 if (regnum >=gdbarch_tdep (gdbarch)->ar_base
93 && regnum < gdbarch_tdep (gdbarch)->ar_base
94 + gdbarch_tdep (gdbarch)->num_aregs)
95 regcache_raw_collect (regcache,regnum,
96 ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]);
97 else if (regnum == -1)
99 for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i)
100 regcache_raw_collect (regcache,
101 gdbarch_tdep (gdbarch)->ar_base + i,
107 supply_gregset_reg (struct regcache *regcache,
108 const gdb_gregset_t *gregsetp, int regnum)
111 xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
113 struct gdbarch *gdbarch = get_regcache_arch (regcache);
115 if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
116 regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc);
117 if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
118 regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
120 if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
121 regcache_raw_supply (regcache,
122 gdbarch_tdep (gdbarch)->wb_regnum,
124 if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
125 regcache_raw_supply (regcache,
126 gdbarch_tdep (gdbarch)->ws_regnum,
128 if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
129 regcache_raw_supply (regcache,
130 gdbarch_tdep (gdbarch)->lbeg_regnum,
132 if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
133 regcache_raw_supply (regcache,
134 gdbarch_tdep (gdbarch)->lend_regnum,
136 if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
137 regcache_raw_supply (regcache,
138 gdbarch_tdep (gdbarch)->lcount_regnum,
140 if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
141 regcache_raw_supply (regcache,
142 gdbarch_tdep (gdbarch)->sar_regnum,
144 if (regnum >=gdbarch_tdep (gdbarch)->ar_base
145 && regnum < gdbarch_tdep (gdbarch)->ar_base
146 + gdbarch_tdep (gdbarch)->num_aregs)
147 regcache_raw_supply (regcache,regnum,
148 ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]);
149 else if (regnum == -1)
151 for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i)
152 regcache_raw_supply (regcache,
153 gdbarch_tdep (gdbarch)->ar_base + i,
159 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
161 supply_gregset_reg (regcache, gregsetp, -1);
165 fill_fpregset (const struct regcache *regcache,
166 gdb_fpregset_t *fpregsetp, int regnum)
172 supply_fpregset (struct regcache *regcache,
173 const gdb_fpregset_t *fpregsetp)
178 /* Fetch greg-register(s) from process/thread TID
179 and store value(s) in GDB's register array. */
182 fetch_gregs (struct regcache *regcache, int regnum)
184 int tid = GET_THREAD_ID (inferior_ptid);
185 const gdb_gregset_t regs;
188 if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
190 perror_with_name (_("Couldn't get registers"));
194 supply_gregset_reg (regcache, ®s, regnum);
197 /* Store greg-register(s) in GDB's register
198 array into the process/thread specified by TID. */
201 store_gregs (struct regcache *regcache, int regnum)
203 int tid = GET_THREAD_ID (inferior_ptid);
207 if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
209 perror_with_name (_("Couldn't get registers"));
213 fill_gregset (regcache, ®s, regnum);
215 if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0)
217 perror_with_name (_("Couldn't write registers"));
223 static int xtreg_high;
225 /* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE
226 interface provides special requests for this. */
229 fetch_xtregs (struct regcache *regcache, int regnum)
231 int tid = GET_THREAD_ID (inferior_ptid);
232 const xtensa_regtable_t *ptr;
233 char xtregs [XTENSA_ELF_XTREG_SIZE];
235 if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0)
236 perror_with_name (_("Couldn't get extended registers"));
238 for (ptr = xtensa_regmap_table; ptr->name; ptr++)
239 if (regnum == ptr->gdb_regnum || regnum == -1)
240 regcache_raw_supply (regcache, ptr->gdb_regnum,
241 xtregs + ptr->ptrace_offset);
245 store_xtregs (struct regcache *regcache, int regnum)
247 int tid = GET_THREAD_ID (inferior_ptid);
248 const xtensa_regtable_t *ptr;
249 char xtregs [XTENSA_ELF_XTREG_SIZE];
251 if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0)
252 perror_with_name (_("Couldn't get extended registers"));
254 for (ptr = xtensa_regmap_table; ptr->name; ptr++)
255 if (regnum == ptr->gdb_regnum || regnum == -1)
256 regcache_raw_collect (regcache, ptr->gdb_regnum,
257 xtregs + ptr->ptrace_offset);
259 if (ptrace (PTRACE_SETXTREGS, tid, 0, (long)&xtregs) < 0)
260 perror_with_name (_("Couldn't write extended registers"));
264 xtensa_linux_fetch_inferior_registers (struct target_ops *ops,
265 struct regcache *regcache, int regnum)
269 fetch_gregs (regcache, regnum);
270 fetch_xtregs (regcache, regnum);
272 else if ((regnum < xtreg_lo) || (regnum > xtreg_high))
273 fetch_gregs (regcache, regnum);
275 fetch_xtregs (regcache, regnum);
279 xtensa_linux_store_inferior_registers (struct target_ops *ops,
280 struct regcache *regcache, int regnum)
284 store_gregs (regcache, regnum);
285 store_xtregs (regcache, regnum);
287 else if ((regnum < xtreg_lo) || (regnum > xtreg_high))
288 store_gregs (regcache, regnum);
290 store_xtregs (regcache, regnum);
293 void _initialize_xtensa_linux_nat (void);
296 _initialize_xtensa_linux_nat (void)
298 struct target_ops *t;
299 const xtensa_regtable_t *ptr;
301 /* Calculate the number range for extended registers. */
302 xtreg_lo = 1000000000;
304 for (ptr = xtensa_regmap_table; ptr->name; ptr++)
306 if (ptr->gdb_regnum < xtreg_lo)
307 xtreg_lo = ptr->gdb_regnum;
308 if (ptr->gdb_regnum > xtreg_high)
309 xtreg_high = ptr->gdb_regnum;
312 /* Fill in the generic GNU/Linux methods. */
315 /* Add our register access methods. */
316 t->to_fetch_registers = xtensa_linux_fetch_inferior_registers;
317 t->to_store_registers = xtensa_linux_store_inferior_registers;
319 linux_nat_add_target (t);