1 /* GNU/Linux/m68k 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. */
23 #include "linux-low.h"
29 #define m68k_num_regs 29
30 #define m68k_num_gregs 18
32 /* This table must line up with REGISTER_NAMES in tm-m68k.h */
33 static int m68k_regmap[] =
36 PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4,
37 PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4,
38 PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4,
39 PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4,
42 14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4,
43 7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4,
47 PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4,
48 PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4,
49 PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4
51 21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4,
52 39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4
57 m68k_cannot_store_register (int regno)
59 return (regno >= m68k_num_regs);
63 m68k_cannot_fetch_register (int regno)
65 return (regno >= m68k_num_regs);
68 #ifdef HAVE_LINUX_REGSETS
69 #include <sys/procfs.h>
70 #include <sys/ptrace.h>
73 m68k_fill_gregset (void *buf)
77 for (i = 0; i < m68k_num_gregs; i++)
78 collect_register (i, (char *) buf + m68k_regmap[i]);
82 m68k_store_gregset (const void *buf)
86 for (i = 0; i < m68k_num_gregs; i++)
87 supply_register (i, (const char *) buf + m68k_regmap[i]);
91 m68k_fill_fpregset (void *buf)
95 for (i = m68k_num_gregs; i < m68k_num_regs; i++)
96 collect_register (i, ((char *) buf
97 + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
101 m68k_store_fpregset (const void *buf)
105 for (i = m68k_num_gregs; i < m68k_num_regs; i++)
106 supply_register (i, ((const char *) buf
107 + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
111 struct regset_info target_regsets[] = {
112 { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
114 m68k_fill_gregset, m68k_store_gregset },
115 { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
117 m68k_fill_fpregset, m68k_store_fpregset },
118 { 0, 0, -1, -1, NULL, NULL }
121 #endif /* HAVE_LINUX_REGSETS */
123 static const char m68k_breakpoint[] = { 0x4E, 0x4F };
124 #define m68k_breakpoint_len 2
131 collect_register_by_name ("pc", &pc);
136 m68k_set_pc (CORE_ADDR value)
138 unsigned long newpc = value;
140 supply_register_by_name ("pc", &newpc);
144 m68k_breakpoint_at (CORE_ADDR pc)
148 read_inferior_memory (pc, c, 2);
149 if (c[0] == 0x4E && c[1] == 0x4F)
155 struct linux_target_ops the_low_target = {
158 m68k_cannot_fetch_register,
159 m68k_cannot_store_register,