1 /* GNU/Linux/CRIS specific low level interface, for the remote server for GDB.
2 Copyright (C) 1995-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "linux-low.h"
21 #include "nat/gdb_ptrace.h"
23 /* Defined in auto-generated file reg-cris.c. */
24 void init_registers_cris (void);
25 extern const struct target_desc *tdesc_cris;
28 #define cris_num_regs 32
30 /* Locations need to match <include/asm/arch/ptrace.h>. */
31 static int cris_regmap[] = {
32 15*4, 14*4, 13*4, 12*4,
45 cris_cannot_store_register (int regno)
47 if (cris_regmap[regno] == -1)
50 return (regno >= cris_num_regs);
54 cris_cannot_fetch_register (int regno)
56 if (cris_regmap[regno] == -1)
59 return (regno >= cris_num_regs);
62 static const unsigned short cris_breakpoint = 0xe938;
63 #define cris_breakpoint_len 2
65 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
67 static const gdb_byte *
68 cris_sw_breakpoint_from_kind (int kind, int *size)
70 *size = cris_breakpoint_len;
71 return (const gdb_byte *) &cris_breakpoint;
75 cris_breakpoint_at (CORE_ADDR where)
79 (*the_target->read_memory) (where, (unsigned char *) &insn,
81 if (insn == cris_breakpoint)
84 /* If necessary, recognize more trap instructions here. GDB only uses the
90 cris_arch_setup (void)
92 current_process ()->tdesc = tdesc_cris;
95 static struct usrregs_info cris_usrregs_info =
101 static struct regs_info regs_info =
103 NULL, /* regset_bitmap */
107 static const struct regs_info *
108 cris_regs_info (void)
113 struct linux_target_ops the_low_target = {
116 cris_cannot_fetch_register,
117 cris_cannot_store_register,
118 NULL, /* fetch_register */
121 NULL, /* breakpoint_kind_from_pc */
122 cris_sw_breakpoint_from_kind,
123 NULL, /* get_next_pcs */
129 initialize_low_arch (void)
131 init_registers_cris ();