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 "qemu/osdep.h" |
21 | #include "cpu.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 | } |
131 | |