Commit | Line | Data |
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45b134e5 | 1 | /* GNU/Linux/CRIS specific low level interface, for the remote server for GDB. |
32d0add0 | 2 | Copyright (C) 1995-2015 Free Software Foundation, Inc. |
45b134e5 OF |
3 | |
4 | This file is part of GDB. | |
5 | ||
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 | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
45b134e5 OF |
9 | (at your option) any later version. |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
45b134e5 OF |
18 | |
19 | #include "server.h" | |
20 | #include "linux-low.h" | |
5826e159 | 21 | #include "nat/gdb_ptrace.h" |
45b134e5 | 22 | |
d05b4ac3 UW |
23 | /* Defined in auto-generated file reg-cris.c. */ |
24 | void init_registers_cris (void); | |
3aee8918 | 25 | extern const struct target_desc *tdesc_cris; |
d05b4ac3 | 26 | |
45b134e5 OF |
27 | /* CRISv10 */ |
28 | #define cris_num_regs 32 | |
29 | ||
30 | /* Locations need to match <include/asm/arch/ptrace.h>. */ | |
31 | static int cris_regmap[] = { | |
32 | 15*4, 14*4, 13*4, 12*4, | |
33 | 11*4, 10*4, 9*4, 8*4, | |
34 | 7*4, 6*4, 5*4, 4*4, | |
35 | 3*4, 2*4, 23*4, 19*4, | |
36 | ||
37 | -1, -1, -1, -1, | |
38 | -1, 17*4, -1, 16*4, | |
39 | -1, -1, -1, 18*4, | |
40 | -1, 17*4, -1, -1 | |
1b3f6016 | 41 | |
45b134e5 OF |
42 | }; |
43 | ||
44 | static int | |
45 | cris_cannot_store_register (int regno) | |
46 | { | |
47 | if (cris_regmap[regno] == -1) | |
48 | return 1; | |
1b3f6016 | 49 | |
45b134e5 OF |
50 | return (regno >= cris_num_regs); |
51 | } | |
52 | ||
53 | static int | |
54 | cris_cannot_fetch_register (int regno) | |
55 | { | |
56 | if (cris_regmap[regno] == -1) | |
57 | return 1; | |
58 | ||
59 | return (regno >= cris_num_regs); | |
60 | } | |
61 | ||
62 | extern int debug_threads; | |
63 | ||
64 | static CORE_ADDR | |
4cd98a19 | 65 | cris_get_pc (struct regcache *regcache) |
45b134e5 OF |
66 | { |
67 | unsigned long pc; | |
442ea881 | 68 | collect_register_by_name (regcache, "pc", &pc); |
45b134e5 | 69 | if (debug_threads) |
87ce2a04 | 70 | debug_printf ("stop pc is %08lx\n", pc); |
45b134e5 OF |
71 | return pc; |
72 | } | |
73 | ||
74 | static void | |
442ea881 | 75 | cris_set_pc (struct regcache *regcache, CORE_ADDR pc) |
45b134e5 OF |
76 | { |
77 | unsigned long newpc = pc; | |
442ea881 | 78 | supply_register_by_name (regcache, "pc", &newpc); |
45b134e5 OF |
79 | } |
80 | ||
81 | static const unsigned short cris_breakpoint = 0xe938; | |
82 | #define cris_breakpoint_len 2 | |
83 | ||
dd373349 AT |
84 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
85 | ||
86 | static const gdb_byte * | |
87 | cris_sw_breakpoint_from_kind (int kind, int *size) | |
88 | { | |
89 | *size = cris_breakpoint_len; | |
90 | return (const gdb_byte *) &cris_breakpoint; | |
91 | } | |
92 | ||
45b134e5 OF |
93 | static int |
94 | cris_breakpoint_at (CORE_ADDR where) | |
95 | { | |
96 | unsigned short insn; | |
97 | ||
f450004a DJ |
98 | (*the_target->read_memory) (where, (unsigned char *) &insn, |
99 | cris_breakpoint_len); | |
45b134e5 OF |
100 | if (insn == cris_breakpoint) |
101 | return 1; | |
102 | ||
103 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
104 | one. */ | |
105 | return 0; | |
106 | } | |
107 | ||
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. */ | |
111 | static CORE_ADDR | |
112 | cris_reinsert_addr (void) | |
113 | { | |
0bfdf32f | 114 | struct regcache *regcache = get_thread_regcache (current_thread, 1); |
45b134e5 | 115 | unsigned long pc; |
442ea881 | 116 | collect_register_by_name (regcache, "srp", &pc); |
45b134e5 OF |
117 | return pc; |
118 | } | |
119 | ||
3aee8918 PA |
120 | static void |
121 | cris_arch_setup (void) | |
122 | { | |
123 | current_process ()->tdesc = tdesc_cris; | |
124 | } | |
125 | ||
126 | static struct usrregs_info cris_usrregs_info = | |
127 | { | |
128 | cris_num_regs, | |
129 | cris_regmap, | |
130 | }; | |
131 | ||
132 | static struct regs_info regs_info = | |
133 | { | |
134 | NULL, /* regset_bitmap */ | |
135 | &cris_usrregs_info, | |
136 | }; | |
137 | ||
138 | static const struct regs_info * | |
139 | cris_regs_info (void) | |
140 | { | |
141 | return ®s_info; | |
142 | } | |
143 | ||
45b134e5 | 144 | struct linux_target_ops the_low_target = { |
3aee8918 PA |
145 | cris_arch_setup, |
146 | cris_regs_info, | |
45b134e5 OF |
147 | cris_cannot_fetch_register, |
148 | cris_cannot_store_register, | |
c14dfd32 | 149 | NULL, /* fetch_register */ |
45b134e5 OF |
150 | cris_get_pc, |
151 | cris_set_pc, | |
dd373349 AT |
152 | NULL, /* breakpoint_kind_from_pc */ |
153 | cris_sw_breakpoint_from_kind, | |
45b134e5 OF |
154 | cris_reinsert_addr, |
155 | 0, | |
156 | cris_breakpoint_at, | |
157 | 0, | |
158 | 0, | |
159 | 0, | |
160 | 0, | |
161 | }; | |
3aee8918 PA |
162 | |
163 | void | |
164 | initialize_low_arch (void) | |
165 | { | |
166 | init_registers_cris (); | |
167 | } |