1 /* GNU/Linux/SH specific low level interface, for the remote server for GDB.
2 Copyright (C) 1995-2015 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
80 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
82 static const gdb_byte
*
83 sh_sw_breakpoint_from_kind (int kind
, int *size
)
85 *size
= sh_breakpoint_len
;
86 return (const gdb_byte
*) &sh_breakpoint
;
90 sh_breakpoint_at (CORE_ADDR where
)
94 (*the_target
->read_memory
) (where
, (unsigned char *) &insn
, 2);
95 if (insn
== sh_breakpoint
)
98 /* If necessary, recognize more trap instructions here. GDB only uses the
103 /* Provide only a fill function for the general register set. ps_lgetregs
104 will use this for NPTL support. */
106 static void sh_fill_gregset (struct regcache
*regcache
, void *buf
)
110 for (i
= 0; i
< 23; i
++)
111 if (sh_regmap
[i
] != -1)
112 collect_register (regcache
, i
, (char *) buf
+ sh_regmap
[i
]);
115 static struct regset_info sh_regsets
[] = {
116 { 0, 0, 0, 0, GENERAL_REGS
, sh_fill_gregset
, NULL
},
117 { 0, 0, 0, -1, -1, NULL
, NULL
}
120 static struct regsets_info sh_regsets_info
=
122 sh_regsets
, /* regsets */
124 NULL
, /* disabled_regsets */
127 static struct usrregs_info sh_usrregs_info
=
133 static struct regs_info regs_info
=
135 NULL
, /* regset_bitmap */
140 static const struct regs_info
*
149 current_process ()->tdesc
= tdesc_sh
;
152 struct linux_target_ops the_low_target
= {
155 sh_cannot_fetch_register
,
156 sh_cannot_store_register
,
157 NULL
, /* fetch_register */
160 NULL
, /* breakpoint_kind_from_pc */
161 sh_sw_breakpoint_from_kind
,
168 initialize_low_arch (void)
170 init_registers_sh ();
172 initialize_regsets_info (&sh_regsets_info
);