1 /* GNU/Linux/SH specific low level interface, for the remote server for GDB.
2 Copyright (C) 1995-2013 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"
22 /* Defined in auto-generated file reg-sh.c. */
23 void init_registers_sh (void);
24 extern const struct target_desc *tdesc_sh;
30 #include <asm/ptrace.h>
32 #define sh_num_regs 41
34 /* Currently, don't check/send MQ. */
35 static int sh_regmap[] = {
36 0, 4, 8, 12, 16, 20, 24, 28,
37 32, 36, 40, 44, 48, 52, 56, 60,
39 REG_PC*4, REG_PR*4, REG_GBR*4, -1,
40 REG_MACH*4, REG_MACL*4, REG_SR*4,
41 REG_FPUL*4, REG_FPSCR*4,
43 REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12,
44 REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28,
45 REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44,
46 REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60,
50 sh_cannot_store_register (int regno)
56 sh_cannot_fetch_register (int regno)
62 sh_get_pc (struct regcache *regcache)
65 collect_register_by_name (regcache, "pc", &pc);
70 sh_set_pc (struct regcache *regcache, CORE_ADDR pc)
72 unsigned long newpc = pc;
73 supply_register_by_name (regcache, "pc", &newpc);
76 /* Correct in either endianness, obviously. */
77 static const unsigned short sh_breakpoint = 0xc3c3;
78 #define sh_breakpoint_len 2
81 sh_breakpoint_at (CORE_ADDR where)
85 (*the_target->read_memory) (where, (unsigned char *) &insn, 2);
86 if (insn == sh_breakpoint)
89 /* If necessary, recognize more trap instructions here. GDB only uses the
94 /* Provide only a fill function for the general register set. ps_lgetregs
95 will use this for NPTL support. */
97 static void sh_fill_gregset (struct regcache *regcache, void *buf)
101 for (i = 0; i < 23; i++)
102 if (sh_regmap[i] != -1)
103 collect_register (regcache, i, (char *) buf + sh_regmap[i]);
106 static struct regset_info sh_regsets[] = {
107 { 0, 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
108 { 0, 0, 0, -1, -1, NULL, NULL }
111 static struct regsets_info sh_regsets_info =
113 sh_regsets, /* regsets */
115 NULL, /* disabled_regsets */
118 static struct usrregs_info sh_usrregs_info =
124 static struct regs_info regs_info =
126 NULL, /* regset_bitmap */
131 static const struct regs_info *
140 current_process ()->tdesc = tdesc_sh;
143 struct linux_target_ops the_low_target = {
146 sh_cannot_fetch_register,
147 sh_cannot_store_register,
148 NULL, /* fetch_register */
151 (const unsigned char *) &sh_breakpoint,
159 initialize_low_arch (void)
161 init_registers_sh ();
163 initialize_regsets_info (&sh_regsets_info);