diff options
Diffstat (limited to 'arch/x86_64/ia32/ptrace32.c')
-rw-r--r-- | arch/x86_64/ia32/ptrace32.c | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/arch/x86_64/ia32/ptrace32.c b/arch/x86_64/ia32/ptrace32.c deleted file mode 100644 index 4a233ad6269c..000000000000 --- a/arch/x86_64/ia32/ptrace32.c +++ /dev/null | |||
@@ -1,404 +0,0 @@ | |||
1 | /* | ||
2 | * 32bit ptrace for x86-64. | ||
3 | * | ||
4 | * Copyright 2001,2002 Andi Kleen, SuSE Labs. | ||
5 | * Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier | ||
6 | * copyright. | ||
7 | * | ||
8 | * This allows to access 64bit processes too; but there is no way to see the extended | ||
9 | * register contents. | ||
10 | */ | ||
11 | |||
12 | #include <linux/kernel.h> | ||
13 | #include <linux/stddef.h> | ||
14 | #include <linux/sched.h> | ||
15 | #include <linux/syscalls.h> | ||
16 | #include <linux/unistd.h> | ||
17 | #include <linux/mm.h> | ||
18 | #include <linux/err.h> | ||
19 | #include <linux/ptrace.h> | ||
20 | #include <asm/ptrace.h> | ||
21 | #include <asm/compat.h> | ||
22 | #include <asm/uaccess.h> | ||
23 | #include <asm/user32.h> | ||
24 | #include <asm/user.h> | ||
25 | #include <asm/errno.h> | ||
26 | #include <asm/debugreg.h> | ||
27 | #include <asm/i387.h> | ||
28 | #include <asm/fpu32.h> | ||
29 | #include <asm/ia32.h> | ||
30 | |||
31 | /* | ||
32 | * Determines which flags the user has access to [1 = access, 0 = no access]. | ||
33 | * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9). | ||
34 | * Also masks reserved bits (31-22, 15, 5, 3, 1). | ||
35 | */ | ||
36 | #define FLAG_MASK 0x54dd5UL | ||
37 | |||
38 | #define R32(l,q) \ | ||
39 | case offsetof(struct user32, regs.l): stack[offsetof(struct pt_regs, q)/8] = val; break | ||
40 | |||
41 | static int putreg32(struct task_struct *child, unsigned regno, u32 val) | ||
42 | { | ||
43 | int i; | ||
44 | __u64 *stack = (__u64 *)task_pt_regs(child); | ||
45 | |||
46 | switch (regno) { | ||
47 | case offsetof(struct user32, regs.fs): | ||
48 | if (val && (val & 3) != 3) return -EIO; | ||
49 | child->thread.fsindex = val & 0xffff; | ||
50 | break; | ||
51 | case offsetof(struct user32, regs.gs): | ||
52 | if (val && (val & 3) != 3) return -EIO; | ||
53 | child->thread.gsindex = val & 0xffff; | ||
54 | break; | ||
55 | case offsetof(struct user32, regs.ds): | ||
56 | if (val && (val & 3) != 3) return -EIO; | ||
57 | child->thread.ds = val & 0xffff; | ||
58 | break; | ||
59 | case offsetof(struct user32, regs.es): | ||
60 | child->thread.es = val & 0xffff; | ||
61 | break; | ||
62 | case offsetof(struct user32, regs.ss): | ||
63 | if ((val & 3) != 3) return -EIO; | ||
64 | stack[offsetof(struct pt_regs, ss)/8] = val & 0xffff; | ||
65 | break; | ||
66 | case offsetof(struct user32, regs.cs): | ||
67 | if ((val & 3) != 3) return -EIO; | ||
68 | stack[offsetof(struct pt_regs, cs)/8] = val & 0xffff; | ||
69 | break; | ||
70 | |||
71 | R32(ebx, rbx); | ||
72 | R32(ecx, rcx); | ||
73 | R32(edx, rdx); | ||
74 | R32(edi, rdi); | ||
75 | R32(esi, rsi); | ||
76 | R32(ebp, rbp); | ||
77 | R32(eax, rax); | ||
78 | R32(orig_eax, orig_rax); | ||
79 | R32(eip, rip); | ||
80 | R32(esp, rsp); | ||
81 | |||
82 | case offsetof(struct user32, regs.eflags): { | ||
83 | __u64 *flags = &stack[offsetof(struct pt_regs, eflags)/8]; | ||
84 | val &= FLAG_MASK; | ||
85 | *flags = val | (*flags & ~FLAG_MASK); | ||
86 | break; | ||
87 | } | ||
88 | |||
89 | case offsetof(struct user32, u_debugreg[4]): | ||
90 | case offsetof(struct user32, u_debugreg[5]): | ||
91 | return -EIO; | ||
92 | |||
93 | case offsetof(struct user32, u_debugreg[0]): | ||
94 | child->thread.debugreg0 = val; | ||
95 | break; | ||
96 | |||
97 | case offsetof(struct user32, u_debugreg[1]): | ||
98 | child->thread.debugreg1 = val; | ||
99 | break; | ||
100 | |||
101 | case offsetof(struct user32, u_debugreg[2]): | ||
102 | child->thread.debugreg2 = val; | ||
103 | break; | ||
104 | |||
105 | case offsetof(struct user32, u_debugreg[3]): | ||
106 | child->thread.debugreg3 = val; | ||
107 | break; | ||
108 | |||
109 | case offsetof(struct user32, u_debugreg[6]): | ||
110 | child->thread.debugreg6 = val; | ||
111 | break; | ||
112 | |||
113 | case offsetof(struct user32, u_debugreg[7]): | ||
114 | val &= ~DR_CONTROL_RESERVED; | ||
115 | /* See arch/i386/kernel/ptrace.c for an explanation of | ||
116 | * this awkward check.*/ | ||
117 | for(i=0; i<4; i++) | ||
118 | if ((0x5454 >> ((val >> (16 + 4*i)) & 0xf)) & 1) | ||
119 | return -EIO; | ||
120 | child->thread.debugreg7 = val; | ||
121 | if (val) | ||
122 | set_tsk_thread_flag(child, TIF_DEBUG); | ||
123 | else | ||
124 | clear_tsk_thread_flag(child, TIF_DEBUG); | ||
125 | break; | ||
126 | |||
127 | default: | ||
128 | if (regno > sizeof(struct user32) || (regno & 3)) | ||
129 | return -EIO; | ||
130 | |||
131 | /* Other dummy fields in the virtual user structure are ignored */ | ||
132 | break; | ||
133 | } | ||
134 | return 0; | ||
135 | } | ||
136 | |||
137 | #undef R32 | ||
138 | |||
139 | #define R32(l,q) \ | ||
140 | case offsetof(struct user32, regs.l): *val = stack[offsetof(struct pt_regs, q)/8]; break | ||
141 | |||
142 | static int getreg32(struct task_struct *child, unsigned regno, u32 *val) | ||
143 | { | ||
144 | __u64 *stack = (__u64 *)task_pt_regs(child); | ||
145 | |||
146 | switch (regno) { | ||
147 | case offsetof(struct user32, regs.fs): | ||
148 | *val = child->thread.fsindex; | ||
149 | break; | ||
150 | case offsetof(struct user32, regs.gs): | ||
151 | *val = child->thread.gsindex; | ||
152 | break; | ||
153 | case offsetof(struct user32, regs.ds): | ||
154 | *val = child->thread.ds; | ||
155 | break; | ||
156 | case offsetof(struct user32, regs.es): | ||
157 | *val = child->thread.es; | ||
158 | break; | ||
159 | |||
160 | R32(cs, cs); | ||
161 | R32(ss, ss); | ||
162 | R32(ebx, rbx); | ||
163 | R32(ecx, rcx); | ||
164 | R32(edx, rdx); | ||
165 | R32(edi, rdi); | ||
166 | R32(esi, rsi); | ||
167 | R32(ebp, rbp); | ||
168 | R32(eax, rax); | ||
169 | R32(orig_eax, orig_rax); | ||
170 | R32(eip, rip); | ||
171 | R32(eflags, eflags); | ||
172 | R32(esp, rsp); | ||
173 | |||
174 | case offsetof(struct user32, u_debugreg[0]): | ||
175 | *val = child->thread.debugreg0; | ||
176 | break; | ||
177 | case offsetof(struct user32, u_debugreg[1]): | ||
178 | *val = child->thread.debugreg1; | ||
179 | break; | ||
180 | case offsetof(struct user32, u_debugreg[2]): | ||
181 | *val = child->thread.debugreg2; | ||
182 | break; | ||
183 | case offsetof(struct user32, u_debugreg[3]): | ||
184 | *val = child->thread.debugreg3; | ||
185 | break; | ||
186 | case offsetof(struct user32, u_debugreg[6]): | ||
187 | *val = child->thread.debugreg6; | ||
188 | break; | ||
189 | case offsetof(struct user32, u_debugreg[7]): | ||
190 | *val = child->thread.debugreg7; | ||
191 | break; | ||
192 | |||
193 | default: | ||
194 | if (regno > sizeof(struct user32) || (regno & 3)) | ||
195 | return -EIO; | ||
196 | |||
197 | /* Other dummy fields in the virtual user structure are ignored */ | ||
198 | *val = 0; | ||
199 | break; | ||
200 | } | ||
201 | return 0; | ||
202 | } | ||
203 | |||
204 | #undef R32 | ||
205 | |||
206 | static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) | ||
207 | { | ||
208 | int ret; | ||
209 | compat_siginfo_t __user *si32 = compat_ptr(data); | ||
210 | siginfo_t ssi; | ||
211 | siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t)); | ||
212 | if (request == PTRACE_SETSIGINFO) { | ||
213 | memset(&ssi, 0, sizeof(siginfo_t)); | ||
214 | ret = copy_siginfo_from_user32(&ssi, si32); | ||
215 | if (ret) | ||
216 | return ret; | ||
217 | if (copy_to_user(si, &ssi, sizeof(siginfo_t))) | ||
218 | return -EFAULT; | ||
219 | } | ||
220 | ret = sys_ptrace(request, pid, addr, (unsigned long)si); | ||
221 | if (ret) | ||
222 | return ret; | ||
223 | if (request == PTRACE_GETSIGINFO) { | ||
224 | if (copy_from_user(&ssi, si, sizeof(siginfo_t))) | ||
225 | return -EFAULT; | ||
226 | ret = copy_siginfo_to_user32(si32, &ssi); | ||
227 | } | ||
228 | return ret; | ||
229 | } | ||
230 | |||
231 | asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) | ||
232 | { | ||
233 | struct task_struct *child; | ||
234 | struct pt_regs *childregs; | ||
235 | void __user *datap = compat_ptr(data); | ||
236 | int ret; | ||
237 | __u32 val; | ||
238 | |||
239 | switch (request) { | ||
240 | case PTRACE_TRACEME: | ||
241 | case PTRACE_ATTACH: | ||
242 | case PTRACE_KILL: | ||
243 | case PTRACE_CONT: | ||
244 | case PTRACE_SINGLESTEP: | ||
245 | case PTRACE_DETACH: | ||
246 | case PTRACE_SYSCALL: | ||
247 | case PTRACE_OLDSETOPTIONS: | ||
248 | case PTRACE_SETOPTIONS: | ||
249 | case PTRACE_SET_THREAD_AREA: | ||
250 | case PTRACE_GET_THREAD_AREA: | ||
251 | return sys_ptrace(request, pid, addr, data); | ||
252 | |||
253 | default: | ||
254 | return -EINVAL; | ||
255 | |||
256 | case PTRACE_PEEKTEXT: | ||
257 | case PTRACE_PEEKDATA: | ||
258 | case PTRACE_POKEDATA: | ||
259 | case PTRACE_POKETEXT: | ||
260 | case PTRACE_POKEUSR: | ||
261 | case PTRACE_PEEKUSR: | ||
262 | case PTRACE_GETREGS: | ||
263 | case PTRACE_SETREGS: | ||
264 | case PTRACE_SETFPREGS: | ||
265 | case PTRACE_GETFPREGS: | ||
266 | case PTRACE_SETFPXREGS: | ||
267 | case PTRACE_GETFPXREGS: | ||
268 | case PTRACE_GETEVENTMSG: | ||
269 | break; | ||
270 | |||
271 | case PTRACE_SETSIGINFO: | ||
272 | case PTRACE_GETSIGINFO: | ||
273 | return ptrace32_siginfo(request, pid, addr, data); | ||
274 | } | ||
275 | |||
276 | child = ptrace_get_task_struct(pid); | ||
277 | if (IS_ERR(child)) | ||
278 | return PTR_ERR(child); | ||
279 | |||
280 | ret = ptrace_check_attach(child, request == PTRACE_KILL); | ||
281 | if (ret < 0) | ||
282 | goto out; | ||
283 | |||
284 | childregs = task_pt_regs(child); | ||
285 | |||
286 | switch (request) { | ||
287 | case PTRACE_PEEKDATA: | ||
288 | case PTRACE_PEEKTEXT: | ||
289 | ret = 0; | ||
290 | if (access_process_vm(child, addr, &val, sizeof(u32), 0)!=sizeof(u32)) | ||
291 | ret = -EIO; | ||
292 | else | ||
293 | ret = put_user(val, (unsigned int __user *)datap); | ||
294 | break; | ||
295 | |||
296 | case PTRACE_POKEDATA: | ||
297 | case PTRACE_POKETEXT: | ||
298 | ret = 0; | ||
299 | if (access_process_vm(child, addr, &data, sizeof(u32), 1)!=sizeof(u32)) | ||
300 | ret = -EIO; | ||
301 | break; | ||
302 | |||
303 | case PTRACE_PEEKUSR: | ||
304 | ret = getreg32(child, addr, &val); | ||
305 | if (ret == 0) | ||
306 | ret = put_user(val, (__u32 __user *)datap); | ||
307 | break; | ||
308 | |||
309 | case PTRACE_POKEUSR: | ||
310 | ret = putreg32(child, addr, data); | ||
311 | break; | ||
312 | |||
313 | case PTRACE_GETREGS: { /* Get all gp regs from the child. */ | ||
314 | int i; | ||
315 | if (!access_ok(VERIFY_WRITE, datap, 16*4)) { | ||
316 | ret = -EIO; | ||
317 | break; | ||
318 | } | ||
319 | ret = 0; | ||
320 | for ( i = 0; i <= 16*4 ; i += sizeof(__u32) ) { | ||
321 | getreg32(child, i, &val); | ||
322 | ret |= __put_user(val,(u32 __user *)datap); | ||
323 | datap += sizeof(u32); | ||
324 | } | ||
325 | break; | ||
326 | } | ||
327 | |||
328 | case PTRACE_SETREGS: { /* Set all gp regs in the child. */ | ||
329 | unsigned long tmp; | ||
330 | int i; | ||
331 | if (!access_ok(VERIFY_READ, datap, 16*4)) { | ||
332 | ret = -EIO; | ||
333 | break; | ||
334 | } | ||
335 | ret = 0; | ||
336 | for ( i = 0; i <= 16*4; i += sizeof(u32) ) { | ||
337 | ret |= __get_user(tmp, (u32 __user *)datap); | ||
338 | putreg32(child, i, tmp); | ||
339 | datap += sizeof(u32); | ||
340 | } | ||
341 | break; | ||
342 | } | ||
343 | |||
344 | case PTRACE_GETFPREGS: | ||
345 | ret = -EIO; | ||
346 | if (!access_ok(VERIFY_READ, compat_ptr(data), | ||
347 | sizeof(struct user_i387_struct))) | ||
348 | break; | ||
349 | save_i387_ia32(child, datap, childregs, 1); | ||
350 | ret = 0; | ||
351 | break; | ||
352 | |||
353 | case PTRACE_SETFPREGS: | ||
354 | ret = -EIO; | ||
355 | if (!access_ok(VERIFY_WRITE, datap, | ||
356 | sizeof(struct user_i387_struct))) | ||
357 | break; | ||
358 | ret = 0; | ||
359 | /* don't check EFAULT to be bug-to-bug compatible to i386 */ | ||
360 | restore_i387_ia32(child, datap, 1); | ||
361 | break; | ||
362 | |||
363 | case PTRACE_GETFPXREGS: { | ||
364 | struct user32_fxsr_struct __user *u = datap; | ||
365 | init_fpu(child); | ||
366 | ret = -EIO; | ||
367 | if (!access_ok(VERIFY_WRITE, u, sizeof(*u))) | ||
368 | break; | ||
369 | ret = -EFAULT; | ||
370 | if (__copy_to_user(u, &child->thread.i387.fxsave, sizeof(*u))) | ||
371 | break; | ||
372 | ret = __put_user(childregs->cs, &u->fcs); | ||
373 | ret |= __put_user(child->thread.ds, &u->fos); | ||
374 | break; | ||
375 | } | ||
376 | case PTRACE_SETFPXREGS: { | ||
377 | struct user32_fxsr_struct __user *u = datap; | ||
378 | unlazy_fpu(child); | ||
379 | ret = -EIO; | ||
380 | if (!access_ok(VERIFY_READ, u, sizeof(*u))) | ||
381 | break; | ||
382 | /* no checking to be bug-to-bug compatible with i386. */ | ||
383 | /* but silence warning */ | ||
384 | if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u))) | ||
385 | ; | ||
386 | set_stopped_child_used_math(child); | ||
387 | child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask; | ||
388 | ret = 0; | ||
389 | break; | ||
390 | } | ||
391 | |||
392 | case PTRACE_GETEVENTMSG: | ||
393 | ret = put_user(child->ptrace_message,(unsigned int __user *)compat_ptr(data)); | ||
394 | break; | ||
395 | |||
396 | default: | ||
397 | BUG(); | ||
398 | } | ||
399 | |||
400 | out: | ||
401 | put_task_struct(child); | ||
402 | return ret; | ||
403 | } | ||
404 | |||