1 /* FreeBSD/ARM specific low level interface, for the remote server for GDB.
2 Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #include <sys/cdefs.h>
23 __FBSDID("$FreeBSD$");
32 #include <sys/procfs.h>
33 #include <sys/ptrace.h>
35 #define arm_num_regs 26
37 static int arm_regmap[] = {
38 0, 4, 8, 12, 16, 20, 24, 28,
39 32, 36, 40, 44, 48, 52, 56, 60,
40 -1, -1, -1, -1, -1, -1, -1, -1, -1,
45 arm_cannot_store_register (int regno)
47 return (regno >= arm_num_regs);
51 arm_cannot_fetch_register (int regno)
53 return (regno >= arm_num_regs);
56 extern int debug_threads;
62 collect_register_by_name ("pc", &pc);
64 fprintf (stderr, "stop pc is %08lx\n", pc);
69 arm_set_pc (CORE_ADDR pc)
71 unsigned long newpc = pc;
72 supply_register_by_name ("pc", &newpc);
75 /* Correct in either endianness. We do not support Thumb yet. */
76 static const unsigned long arm_breakpoint = 0xef9f0001;
77 #define arm_breakpoint_len 4
80 arm_breakpoint_at (CORE_ADDR where)
84 (*the_target->read_memory) (where, (char *) &insn, 4);
85 if (insn == arm_breakpoint)
88 /* If necessary, recognize more trap instructions here. GDB only uses the
93 /* We only place breakpoints in empty marker functions, and thread locking
94 is outside of the function. So rather than importing software single-step,
95 we can just run until exit. */
100 collect_register_by_name ("lr", &pc);
105 arm_fill_gregset (void *buf)
109 for (i = 0; i < arm_num_regs; i++)
110 if (arm_regmap[i] != -1)
111 collect_register (i, ((char *) buf) + arm_regmap[i]);
116 arm_store_gregset (const void *buf)
120 for (i = 0; i < arm_num_regs; i++)
121 if (arm_regmap[i] != -1)
122 supply_register (i, ((char *) buf) + arm_regmap[i]);
127 struct regset_info target_regsets[] = {
128 {PT_GETREGS, PT_SETREGS, sizeof (struct reg),
130 arm_fill_gregset, arm_store_gregset },
131 { 0, 0, -1, -1, NULL, NULL }
134 struct fbsd_target_ops the_low_target = {
137 arm_cannot_fetch_register,
138 arm_cannot_store_register,
141 (const char *) &arm_breakpoint,