ahci: Reorder error cases in handle_cmd
[qemu.git] / target-alpha / gdbstub.c
1 /*
2 * Alpha 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 alpha_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
25 {
26 AlphaCPU *cpu = ALPHA_CPU(cs);
27 CPUAlphaState *env = &cpu->env;
28 uint64_t val;
29 CPU_DoubleU d;
30
31 switch (n) {
32 case 0 ... 30:
33 val = env->ir[n];
34 break;
35 case 32 ... 62:
36 d.d = env->fir[n - 32];
37 val = d.ll;
38 break;
39 case 63:
40 val = cpu_alpha_load_fpcr(env);
41 break;
42 case 64:
43 val = env->pc;
44 break;
45 case 66:
46 val = env->unique;
47 break;
48 case 31:
49 case 65:
50 /* 31 really is the zero register; 65 is unassigned in the
51 gdb protocol, but is still required to occupy 8 bytes. */
52 val = 0;
53 break;
54 default:
55 return 0;
56 }
57 return gdb_get_regl(mem_buf, val);
58 }
59
60 int alpha_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
61 {
62 AlphaCPU *cpu = ALPHA_CPU(cs);
63 CPUAlphaState *env = &cpu->env;
64 target_ulong tmp = ldtul_p(mem_buf);
65 CPU_DoubleU d;
66
67 switch (n) {
68 case 0 ... 30:
69 env->ir[n] = tmp;
70 break;
71 case 32 ... 62:
72 d.ll = tmp;
73 env->fir[n - 32] = d.d;
74 break;
75 case 63:
76 cpu_alpha_store_fpcr(env, tmp);
77 break;
78 case 64:
79 env->pc = tmp;
80 break;
81 case 66:
82 env->unique = tmp;
83 break;
84 case 31:
85 case 65:
86 /* 31 really is the zero register; 65 is unassigned in the
87 gdb protocol, but is still required to occupy 8 bytes. */
88 break;
89 default:
90 return 0;
91 }
92 return 8;
93 }