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1 | /* | |
2 | * CRIS gdb server stub | |
3 | * | |
4 | * Copyright (c) 2003-2005 Fabrice Bellard | |
5 | * Copyright (c) 2013 SUSE LINUX Products GmbH | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This library 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 GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | #include "config.h" | |
21 | #include "qemu-common.h" | |
22 | #include "exec/gdbstub.h" | |
23 | ||
24 | int crisv10_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) | |
25 | { | |
26 | CRISCPU *cpu = CRIS_CPU(cs); | |
27 | CPUCRISState *env = &cpu->env; | |
28 | ||
29 | if (n < 15) { | |
30 | return gdb_get_reg32(mem_buf, env->regs[n]); | |
31 | } | |
32 | ||
33 | if (n == 15) { | |
34 | return gdb_get_reg32(mem_buf, env->pc); | |
35 | } | |
36 | ||
37 | if (n < 32) { | |
38 | switch (n) { | |
39 | case 16: | |
40 | return gdb_get_reg8(mem_buf, env->pregs[n - 16]); | |
41 | case 17: | |
42 | return gdb_get_reg8(mem_buf, env->pregs[n - 16]); | |
43 | case 20: | |
44 | case 21: | |
45 | return gdb_get_reg16(mem_buf, env->pregs[n - 16]); | |
46 | default: | |
47 | if (n >= 23) { | |
48 | return gdb_get_reg32(mem_buf, env->pregs[n - 16]); | |
49 | } | |
50 | break; | |
51 | } | |
52 | } | |
53 | return 0; | |
54 | } | |
55 | ||
56 | int cris_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) | |
57 | { | |
58 | CRISCPU *cpu = CRIS_CPU(cs); | |
59 | CPUCRISState *env = &cpu->env; | |
60 | uint8_t srs; | |
61 | ||
62 | srs = env->pregs[PR_SRS]; | |
63 | if (n < 16) { | |
64 | return gdb_get_reg32(mem_buf, env->regs[n]); | |
65 | } | |
66 | ||
67 | if (n >= 21 && n < 32) { | |
68 | return gdb_get_reg32(mem_buf, env->pregs[n - 16]); | |
69 | } | |
70 | if (n >= 33 && n < 49) { | |
71 | return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]); | |
72 | } | |
73 | switch (n) { | |
74 | case 16: | |
75 | return gdb_get_reg8(mem_buf, env->pregs[0]); | |
76 | case 17: | |
77 | return gdb_get_reg8(mem_buf, env->pregs[1]); | |
78 | case 18: | |
79 | return gdb_get_reg32(mem_buf, env->pregs[2]); | |
80 | case 19: | |
81 | return gdb_get_reg8(mem_buf, srs); | |
82 | case 20: | |
83 | return gdb_get_reg16(mem_buf, env->pregs[4]); | |
84 | case 32: | |
85 | return gdb_get_reg32(mem_buf, env->pc); | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | int cris_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) | |
92 | { | |
93 | CRISCPU *cpu = CRIS_CPU(cs); | |
94 | CPUCRISState *env = &cpu->env; | |
95 | uint32_t tmp; | |
96 | ||
97 | if (n > 49) { | |
98 | return 0; | |
99 | } | |
100 | ||
101 | tmp = ldl_p(mem_buf); | |
102 | ||
103 | if (n < 16) { | |
104 | env->regs[n] = tmp; | |
105 | } | |
106 | ||
107 | if (n >= 21 && n < 32) { | |
108 | env->pregs[n - 16] = tmp; | |
109 | } | |
110 | ||
111 | /* FIXME: Should support function regs be writable? */ | |
112 | switch (n) { | |
113 | case 16: | |
114 | return 1; | |
115 | case 17: | |
116 | return 1; | |
117 | case 18: | |
118 | env->pregs[PR_PID] = tmp; | |
119 | break; | |
120 | case 19: | |
121 | return 1; | |
122 | case 20: | |
123 | return 2; | |
124 | case 32: | |
125 | env->pc = tmp; | |
126 | break; | |
127 | } | |
128 | ||
129 | return 4; | |
130 | } |