1 /* GNU/Linux/CRIS 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"
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 extern int debug_threads
;
65 cris_get_pc (struct regcache
*regcache
)
68 collect_register_by_name (regcache
, "pc", &pc
);
70 debug_printf ("stop pc is %08lx\n", pc
);
75 cris_set_pc (struct regcache
*regcache
, CORE_ADDR pc
)
77 unsigned long newpc
= pc
;
78 supply_register_by_name (regcache
, "pc", &newpc
);
81 static const unsigned short cris_breakpoint
= 0xe938;
82 #define cris_breakpoint_len 2
84 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
86 static const gdb_byte
*
87 cris_sw_breakpoint_from_kind (int kind
, int *size
)
89 *size
= cris_breakpoint_len
;
90 return (const gdb_byte
*) &cris_breakpoint
;
94 cris_breakpoint_at (CORE_ADDR where
)
98 (*the_target
->read_memory
) (where
, (unsigned char *) &insn
,
100 if (insn
== cris_breakpoint
)
103 /* If necessary, recognize more trap instructions here. GDB only uses the
108 /* We only place breakpoints in empty marker functions, and thread locking
109 is outside of the function. So rather than importing software single-step,
110 we can just run until exit. */
112 cris_reinsert_addr (void)
114 struct regcache
*regcache
= get_thread_regcache (current_thread
, 1);
116 collect_register_by_name (regcache
, "srp", &pc
);
121 cris_arch_setup (void)
123 current_process ()->tdesc
= tdesc_cris
;
126 static struct usrregs_info cris_usrregs_info
=
132 static struct regs_info regs_info
=
134 NULL
, /* regset_bitmap */
138 static const struct regs_info
*
139 cris_regs_info (void)
144 struct linux_target_ops the_low_target
= {
147 cris_cannot_fetch_register
,
148 cris_cannot_store_register
,
149 NULL
, /* fetch_register */
152 NULL
, /* breakpoint_kind_from_pc */
153 cris_sw_breakpoint_from_kind
,
164 initialize_low_arch (void)
166 init_registers_cris ();