Commit | Line | Data |
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45b134e5 | 1 | /* GNU/Linux/CRIS specific low level interface, for the remote server for GDB. |
6aba47ca | 2 | Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
9b254dd1 | 3 | 2007, 2008 Free Software Foundation, Inc. |
45b134e5 OF |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
45b134e5 OF |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
45b134e5 OF |
19 | |
20 | #include "server.h" | |
21 | #include "linux-low.h" | |
22 | #include <sys/ptrace.h> | |
23 | ||
24 | /* CRISv10 */ | |
25 | #define cris_num_regs 32 | |
26 | ||
27 | /* Locations need to match <include/asm/arch/ptrace.h>. */ | |
28 | static int cris_regmap[] = { | |
29 | 15*4, 14*4, 13*4, 12*4, | |
30 | 11*4, 10*4, 9*4, 8*4, | |
31 | 7*4, 6*4, 5*4, 4*4, | |
32 | 3*4, 2*4, 23*4, 19*4, | |
33 | ||
34 | -1, -1, -1, -1, | |
35 | -1, 17*4, -1, 16*4, | |
36 | -1, -1, -1, 18*4, | |
37 | -1, 17*4, -1, -1 | |
38 | ||
39 | }; | |
40 | ||
41 | static int | |
42 | cris_cannot_store_register (int regno) | |
43 | { | |
44 | if (cris_regmap[regno] == -1) | |
45 | return 1; | |
46 | ||
47 | return (regno >= cris_num_regs); | |
48 | } | |
49 | ||
50 | static int | |
51 | cris_cannot_fetch_register (int regno) | |
52 | { | |
53 | if (cris_regmap[regno] == -1) | |
54 | return 1; | |
55 | ||
56 | return (regno >= cris_num_regs); | |
57 | } | |
58 | ||
59 | extern int debug_threads; | |
60 | ||
61 | static CORE_ADDR | |
62 | cris_get_pc (void) | |
63 | { | |
64 | unsigned long pc; | |
65 | collect_register_by_name ("pc", &pc); | |
66 | if (debug_threads) | |
67 | fprintf (stderr, "stop pc is %08lx\n", pc); | |
68 | return pc; | |
69 | } | |
70 | ||
71 | static void | |
72 | cris_set_pc (CORE_ADDR pc) | |
73 | { | |
74 | unsigned long newpc = pc; | |
75 | supply_register_by_name ("pc", &newpc); | |
76 | } | |
77 | ||
78 | static const unsigned short cris_breakpoint = 0xe938; | |
79 | #define cris_breakpoint_len 2 | |
80 | ||
81 | static int | |
82 | cris_breakpoint_at (CORE_ADDR where) | |
83 | { | |
84 | unsigned short insn; | |
85 | ||
f450004a DJ |
86 | (*the_target->read_memory) (where, (unsigned char *) &insn, |
87 | cris_breakpoint_len); | |
45b134e5 OF |
88 | if (insn == cris_breakpoint) |
89 | return 1; | |
90 | ||
91 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
92 | one. */ | |
93 | return 0; | |
94 | } | |
95 | ||
96 | /* We only place breakpoints in empty marker functions, and thread locking | |
97 | is outside of the function. So rather than importing software single-step, | |
98 | we can just run until exit. */ | |
99 | static CORE_ADDR | |
100 | cris_reinsert_addr (void) | |
101 | { | |
102 | unsigned long pc; | |
103 | collect_register_by_name ("srp", &pc); | |
104 | return pc; | |
105 | } | |
106 | ||
107 | struct linux_target_ops the_low_target = { | |
108 | cris_num_regs, | |
109 | cris_regmap, | |
110 | cris_cannot_fetch_register, | |
111 | cris_cannot_store_register, | |
112 | cris_get_pc, | |
113 | cris_set_pc, | |
f450004a | 114 | (const unsigned char *) &cris_breakpoint, |
45b134e5 OF |
115 | cris_breakpoint_len, |
116 | cris_reinsert_addr, | |
117 | 0, | |
118 | cris_breakpoint_at, | |
119 | 0, | |
120 | 0, | |
121 | 0, | |
122 | 0, | |
123 | }; |