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20#include <linux/ptrace.h>
21#include <linux/regset.h>
22#include <linux/compat.h>
23
24#include <asm/switch_to.h>
25
26#include "ptrace-decl.h"
27
28
29
30
31
32
33
34#define FPRNUMBER(i) (((i) - PT_FPR0) >> 1)
35#define FPRHALF(i) (((i) - PT_FPR0) & 1)
36#define FPRINDEX(i) TS_FPRWIDTH * FPRNUMBER(i) * 2 + FPRHALF(i)
37
38long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
39 compat_ulong_t caddr, compat_ulong_t cdata)
40{
41 unsigned long addr = caddr;
42 unsigned long data = cdata;
43 int ret;
44
45 switch (request) {
46
47
48
49
50
51
52
53
54
55 case PPC_PTRACE_PEEKTEXT_3264:
56 case PPC_PTRACE_PEEKDATA_3264: {
57 u32 tmp;
58 int copied;
59 u32 __user * addrOthers;
60
61 ret = -EIO;
62
63
64 if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
65 break;
66
67 copied = ptrace_access_vm(child, (u64)addrOthers, &tmp,
68 sizeof(tmp), FOLL_FORCE);
69 if (copied != sizeof(tmp))
70 break;
71 ret = put_user(tmp, (u32 __user *)data);
72 break;
73 }
74
75
76 case PTRACE_PEEKUSR: {
77 int index;
78 unsigned long tmp;
79
80 ret = -EIO;
81
82 index = (unsigned long) addr >> 2;
83 if ((addr & 3) || (index > PT_FPSCR32))
84 break;
85
86 if (index < PT_FPR0) {
87 ret = ptrace_get_reg(child, index, &tmp);
88 if (ret)
89 break;
90 } else {
91 flush_fp_to_thread(child);
92
93
94
95
96
97 tmp = ((unsigned int *)child->thread.fp_state.fpr)
98 [FPRINDEX(index)];
99 }
100 ret = put_user((unsigned int)tmp, (u32 __user *)data);
101 break;
102 }
103
104
105
106
107
108
109
110
111
112 case PPC_PTRACE_PEEKUSR_3264: {
113 u32 index;
114 u32 reg32bits;
115 u64 tmp;
116 u32 numReg;
117 u32 part;
118
119 ret = -EIO;
120
121 index = (u64)addr >> 2;
122 numReg = index / 2;
123
124 if (index % 2)
125 part = 1;
126 else
127 part = 0;
128
129
130
131
132 if ((addr & 3) || numReg > PT_FPSCR)
133 break;
134
135 if (numReg >= PT_FPR0) {
136 flush_fp_to_thread(child);
137
138 tmp = child->thread.fp_state.fpr[numReg - PT_FPR0][0];
139 } else {
140 unsigned long tmp2;
141 ret = ptrace_get_reg(child, numReg, &tmp2);
142 if (ret)
143 break;
144 tmp = tmp2;
145 }
146 reg32bits = ((u32*)&tmp)[part];
147 ret = put_user(reg32bits, (u32 __user *)data);
148 break;
149 }
150
151
152
153
154
155
156
157
158
159
160 case PPC_PTRACE_POKETEXT_3264:
161 case PPC_PTRACE_POKEDATA_3264: {
162 u32 tmp = data;
163 u32 __user * addrOthers;
164
165
166 ret = -EIO;
167 if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
168 break;
169 ret = 0;
170 if (ptrace_access_vm(child, (u64)addrOthers, &tmp,
171 sizeof(tmp),
172 FOLL_FORCE | FOLL_WRITE) == sizeof(tmp))
173 break;
174 ret = -EIO;
175 break;
176 }
177
178
179 case PTRACE_POKEUSR: {
180 unsigned long index;
181
182 ret = -EIO;
183
184 index = (unsigned long) addr >> 2;
185 if ((addr & 3) || (index > PT_FPSCR32))
186 break;
187
188 if (index < PT_FPR0) {
189 ret = ptrace_put_reg(child, index, data);
190 } else {
191 flush_fp_to_thread(child);
192
193
194
195
196
197 ((unsigned int *)child->thread.fp_state.fpr)
198 [FPRINDEX(index)] = data;
199 ret = 0;
200 }
201 break;
202 }
203
204
205
206
207
208
209
210
211 case PPC_PTRACE_POKEUSR_3264: {
212 u32 index;
213 u32 numReg;
214
215 ret = -EIO;
216
217 index = (u64)addr >> 2;
218 numReg = index / 2;
219
220
221
222
223
224 if ((addr & 3) || (numReg > PT_FPSCR))
225 break;
226 if (numReg < PT_FPR0) {
227 unsigned long freg;
228 ret = ptrace_get_reg(child, numReg, &freg);
229 if (ret)
230 break;
231 if (index % 2)
232 freg = (freg & ~0xfffffffful) | (data & 0xfffffffful);
233 else
234 freg = (freg & 0xfffffffful) | (data << 32);
235 ret = ptrace_put_reg(child, numReg, freg);
236 } else {
237 u64 *tmp;
238 flush_fp_to_thread(child);
239
240 tmp = &child->thread.fp_state.fpr[numReg - PT_FPR0][0];
241
242 ((u32 *)tmp)[index % 2] = data;
243 ret = 0;
244 }
245 break;
246 }
247
248 case PTRACE_GET_DEBUGREG: {
249#ifndef CONFIG_PPC_ADV_DEBUG_REGS
250 unsigned long dabr_fake;
251#endif
252 ret = -EINVAL;
253
254 if (addr > 0)
255 break;
256#ifdef CONFIG_PPC_ADV_DEBUG_REGS
257 ret = put_user(child->thread.debug.dac1, (u32 __user *)data);
258#else
259 dabr_fake = (
260 (child->thread.hw_brk[0].address & (~HW_BRK_TYPE_DABR)) |
261 (child->thread.hw_brk[0].type & HW_BRK_TYPE_DABR));
262 ret = put_user(dabr_fake, (u32 __user *)data);
263#endif
264 break;
265 }
266
267 case PTRACE_GETREGS:
268 return copy_regset_to_user(
269 child, task_user_regset_view(current), 0,
270 0, PT_REGS_COUNT * sizeof(compat_long_t),
271 compat_ptr(data));
272
273 case PTRACE_SETREGS:
274 return copy_regset_from_user(
275 child, task_user_regset_view(current), 0,
276 0, PT_REGS_COUNT * sizeof(compat_long_t),
277 compat_ptr(data));
278
279 case PTRACE_GETFPREGS:
280 case PTRACE_SETFPREGS:
281 case PTRACE_GETVRREGS:
282 case PTRACE_SETVRREGS:
283 case PTRACE_GETVSRREGS:
284 case PTRACE_SETVSRREGS:
285 case PTRACE_GETREGS64:
286 case PTRACE_SETREGS64:
287 case PTRACE_KILL:
288 case PTRACE_SINGLESTEP:
289 case PTRACE_DETACH:
290 case PTRACE_SET_DEBUGREG:
291 case PTRACE_SYSCALL:
292 case PTRACE_CONT:
293 case PPC_PTRACE_GETHWDBGINFO:
294 case PPC_PTRACE_SETHWDEBUG:
295 case PPC_PTRACE_DELHWDEBUG:
296 ret = arch_ptrace(child, request, addr, data);
297 break;
298
299 default:
300 ret = compat_ptrace_request(child, request, addr, data);
301 break;
302 }
303
304 return ret;
305}
306