1 /* GNU/Linux/CRIS specific low level interface, for the remote server for GDB.
2 Copyright (C) 1995-1996, 1998-2005, 2007-2012 Free Software
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 3 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, see <http://www.gnu.org/licenses/>. */
21 #include "linux-low.h"
22 #include <sys/ptrace.h>
24 /* Defined in auto-generated file reg-cris.c. */
25 void init_registers_cris (void);
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
, void)
68 collect_register_by_name (regcache
, "pc", &pc
);
70 fprintf (stderr
, "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
85 cris_breakpoint_at (CORE_ADDR where
)
89 (*the_target
->read_memory
) (where
, (unsigned char *) &insn
,
91 if (insn
== cris_breakpoint
)
94 /* If necessary, recognize more trap instructions here. GDB only uses the
99 /* We only place breakpoints in empty marker functions, and thread locking
100 is outside of the function. So rather than importing software single-step,
101 we can just run until exit. */
103 cris_reinsert_addr (void)
105 struct regcache
*regcache
= get_thread_regcache (current_inferior
, 1);
107 collect_register_by_name (regcache
, "srp", &pc
);
111 struct linux_target_ops the_low_target
= {
115 cris_cannot_fetch_register
,
116 cris_cannot_store_register
,
119 (const unsigned char *) &cris_breakpoint
,