root / target-ppc / gdbstub.c @ 5b50e790
History | View | Annotate | Download (3.8 kB)
1 |
/*
|
---|---|
2 |
* PowerPC 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 |
/* Old gdb always expects FP registers. Newer (xml-aware) gdb only
|
25 |
* expects whatever the target description contains. Due to a
|
26 |
* historical mishap the FP registers appear in between core integer
|
27 |
* regs and PC, MSR, CR, and so forth. We hack round this by giving the
|
28 |
* FP regs zero size when talking to a newer gdb.
|
29 |
*/
|
30 |
|
31 |
int ppc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) |
32 |
{ |
33 |
PowerPCCPU *cpu = POWERPC_CPU(cs); |
34 |
CPUPPCState *env = &cpu->env; |
35 |
|
36 |
if (n < 32) { |
37 |
/* gprs */
|
38 |
return gdb_get_regl(mem_buf, env->gpr[n]);
|
39 |
} else if (n < 64) { |
40 |
/* fprs */
|
41 |
if (gdb_has_xml) {
|
42 |
return 0; |
43 |
} |
44 |
stfq_p(mem_buf, env->fpr[n-32]);
|
45 |
return 8; |
46 |
} else {
|
47 |
switch (n) {
|
48 |
case 64: |
49 |
return gdb_get_regl(mem_buf, env->nip);
|
50 |
case 65: |
51 |
return gdb_get_regl(mem_buf, env->msr);
|
52 |
case 66: |
53 |
{ |
54 |
uint32_t cr = 0;
|
55 |
int i;
|
56 |
for (i = 0; i < 8; i++) { |
57 |
cr |= env->crf[i] << (32 - ((i + 1) * 4)); |
58 |
} |
59 |
return gdb_get_reg32(mem_buf, cr);
|
60 |
} |
61 |
case 67: |
62 |
return gdb_get_regl(mem_buf, env->lr);
|
63 |
case 68: |
64 |
return gdb_get_regl(mem_buf, env->ctr);
|
65 |
case 69: |
66 |
return gdb_get_regl(mem_buf, env->xer);
|
67 |
case 70: |
68 |
{ |
69 |
if (gdb_has_xml) {
|
70 |
return 0; |
71 |
} |
72 |
return gdb_get_reg32(mem_buf, env->fpscr);
|
73 |
} |
74 |
} |
75 |
} |
76 |
return 0; |
77 |
} |
78 |
|
79 |
int ppc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) |
80 |
{ |
81 |
PowerPCCPU *cpu = POWERPC_CPU(cs); |
82 |
CPUPPCState *env = &cpu->env; |
83 |
|
84 |
if (n < 32) { |
85 |
/* gprs */
|
86 |
env->gpr[n] = ldtul_p(mem_buf); |
87 |
return sizeof(target_ulong); |
88 |
} else if (n < 64) { |
89 |
/* fprs */
|
90 |
if (gdb_has_xml) {
|
91 |
return 0; |
92 |
} |
93 |
env->fpr[n-32] = ldfq_p(mem_buf);
|
94 |
return 8; |
95 |
} else {
|
96 |
switch (n) {
|
97 |
case 64: |
98 |
env->nip = ldtul_p(mem_buf); |
99 |
return sizeof(target_ulong); |
100 |
case 65: |
101 |
ppc_store_msr(env, ldtul_p(mem_buf)); |
102 |
return sizeof(target_ulong); |
103 |
case 66: |
104 |
{ |
105 |
uint32_t cr = ldl_p(mem_buf); |
106 |
int i;
|
107 |
for (i = 0; i < 8; i++) { |
108 |
env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF; |
109 |
} |
110 |
return 4; |
111 |
} |
112 |
case 67: |
113 |
env->lr = ldtul_p(mem_buf); |
114 |
return sizeof(target_ulong); |
115 |
case 68: |
116 |
env->ctr = ldtul_p(mem_buf); |
117 |
return sizeof(target_ulong); |
118 |
case 69: |
119 |
env->xer = ldtul_p(mem_buf); |
120 |
return sizeof(target_ulong); |
121 |
case 70: |
122 |
/* fpscr */
|
123 |
if (gdb_has_xml) {
|
124 |
return 0; |
125 |
} |
126 |
store_fpscr(env, ldtul_p(mem_buf), 0xffffffff);
|
127 |
return sizeof(target_ulong); |
128 |
} |
129 |
} |
130 |
return 0; |
131 |
} |