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authorRoland McGrath <roland@redhat.com>2008-01-30 07:31:02 -0500
committerIngo Molnar <mingo@elte.hu>2008-01-30 07:31:02 -0500
commit25149b62d3e6a3e737af39bd4a0b4e97de0811b7 (patch)
treefc65eb48e7c6254b22f9a5e97056d55ad3c499dc /arch/x86/kernel
parentcbc9d9d98215f08ed998228e7bce88502d1ce360 (diff)
x86: x86 ptrace merge removals
This removes the old separate 64-bit and ia32 ptrace source files. They are no longer used. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/ptrace_64.c470
1 files changed, 0 insertions, 470 deletions
diff --git a/arch/x86/kernel/ptrace_64.c b/arch/x86/kernel/ptrace_64.c
deleted file mode 100644
index 5979dbe8e0a2..000000000000
--- a/arch/x86/kernel/ptrace_64.c
+++ /dev/null
@@ -1,470 +0,0 @@
1/* By Ross Biro 1/23/92 */
2/*
3 * Pentium III FXSR, SSE support
4 * Gareth Hughes <gareth@valinux.com>, May 2000
5 *
6 * x86-64 port 2000-2002 Andi Kleen
7 */
8
9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <linux/mm.h>
12#include <linux/smp.h>
13#include <linux/errno.h>
14#include <linux/ptrace.h>
15#include <linux/user.h>
16#include <linux/security.h>
17#include <linux/audit.h>
18#include <linux/seccomp.h>
19#include <linux/signal.h>
20
21#include <asm/uaccess.h>
22#include <asm/pgtable.h>
23#include <asm/system.h>
24#include <asm/processor.h>
25#include <asm/prctl.h>
26#include <asm/i387.h>
27#include <asm/debugreg.h>
28#include <asm/ldt.h>
29#include <asm/desc.h>
30#include <asm/proto.h>
31#include <asm/ia32.h>
32
33/*
34 * does not yet catch signals sent when the child dies.
35 * in exit.c or in signal.c.
36 */
37
38/*
39 * Determines which flags the user has access to [1 = access, 0 = no access].
40 * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
41 * Also masks reserved bits (63-22, 15, 5, 3, 1).
42 */
43#define FLAG_MASK 0x54dd5UL
44
45/*
46 * Called by kernel/ptrace.c when detaching..
47 *
48 * Make sure the single step bit is not set.
49 */
50void ptrace_disable(struct task_struct *child)
51{
52 user_disable_single_step(child);
53}
54
55static unsigned long *pt_regs_access(struct pt_regs *regs, unsigned long offset)
56{
57 BUILD_BUG_ON(offsetof(struct pt_regs, r15) != 0);
58 return &regs->r15 + (offset / sizeof(regs->r15));
59}
60
61static int putreg(struct task_struct *child,
62 unsigned long regno, unsigned long value)
63{
64 struct pt_regs *regs = task_pt_regs(child);
65 switch (regno) {
66 case offsetof(struct user_regs_struct,fs):
67 if (value && (value & 3) != 3)
68 return -EIO;
69 child->thread.fsindex = value & 0xffff;
70 if (child == current)
71 loadsegment(fs, child->thread.fsindex);
72 return 0;
73 case offsetof(struct user_regs_struct,gs):
74 if (value && (value & 3) != 3)
75 return -EIO;
76 child->thread.gsindex = value & 0xffff;
77 if (child == current)
78 load_gs_index(child->thread.gsindex);
79 return 0;
80 case offsetof(struct user_regs_struct,ds):
81 if (value && (value & 3) != 3)
82 return -EIO;
83 child->thread.ds = value & 0xffff;
84 if (child == current)
85 loadsegment(ds, child->thread.ds);
86 return 0;
87 case offsetof(struct user_regs_struct,es):
88 if (value && (value & 3) != 3)
89 return -EIO;
90 child->thread.es = value & 0xffff;
91 if (child == current)
92 loadsegment(es, child->thread.es);
93 return 0;
94 case offsetof(struct user_regs_struct,ss):
95 if ((value & 3) != 3)
96 return -EIO;
97 value &= 0xffff;
98 return 0;
99 case offsetof(struct user_regs_struct,fs_base):
100 if (value >= TASK_SIZE_OF(child))
101 return -EIO;
102 /*
103 * When changing the segment base, use do_arch_prctl
104 * to set either thread.fs or thread.fsindex and the
105 * corresponding GDT slot.
106 */
107 if (child->thread.fs != value)
108 return do_arch_prctl(child, ARCH_SET_FS, value);
109 return 0;
110 case offsetof(struct user_regs_struct,gs_base):
111 /*
112 * Exactly the same here as the %fs handling above.
113 */
114 if (value >= TASK_SIZE_OF(child))
115 return -EIO;
116 if (child->thread.gs != value)
117 return do_arch_prctl(child, ARCH_SET_GS, value);
118 return 0;
119 case offsetof(struct user_regs_struct,flags):
120 value &= FLAG_MASK;
121 /*
122 * If the user value contains TF, mark that
123 * it was not "us" (the debugger) that set it.
124 * If not, make sure it stays set if we had.
125 */
126 if (value & X86_EFLAGS_TF)
127 clear_tsk_thread_flag(child, TIF_FORCED_TF);
128 else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
129 value |= X86_EFLAGS_TF;
130 value |= regs->flags & ~FLAG_MASK;
131 break;
132 case offsetof(struct user_regs_struct,cs):
133 if ((value & 3) != 3)
134 return -EIO;
135 value &= 0xffff;
136 break;
137 }
138 *pt_regs_access(regs, regno) = value;
139 return 0;
140}
141
142static unsigned long getreg(struct task_struct *child, unsigned long regno)
143{
144 struct pt_regs *regs = task_pt_regs(child);
145 unsigned long val;
146 unsigned int seg;
147 switch (regno) {
148 case offsetof(struct user_regs_struct, fs):
149 if (child == current) {
150 /* Older gas can't assemble movq %?s,%r?? */
151 asm("movl %%fs,%0" : "=r" (seg));
152 return seg;
153 }
154 return child->thread.fsindex;
155 case offsetof(struct user_regs_struct, gs):
156 if (child == current) {
157 asm("movl %%gs,%0" : "=r" (seg));
158 return seg;
159 }
160 return child->thread.gsindex;
161 case offsetof(struct user_regs_struct, ds):
162 if (child == current) {
163 asm("movl %%ds,%0" : "=r" (seg));
164 return seg;
165 }
166 return child->thread.ds;
167 case offsetof(struct user_regs_struct, es):
168 if (child == current) {
169 asm("movl %%es,%0" : "=r" (seg));
170 return seg;
171 }
172 return child->thread.es;
173 case offsetof(struct user_regs_struct, fs_base):
174 /*
175 * do_arch_prctl may have used a GDT slot instead of
176 * the MSR. To userland, it appears the same either
177 * way, except the %fs segment selector might not be 0.
178 */
179 if (child->thread.fs != 0)
180 return child->thread.fs;
181 seg = child->thread.fsindex;
182 if (child == current)
183 asm("movl %%fs,%0" : "=r" (seg));
184 if (seg != FS_TLS_SEL)
185 return 0;
186 return get_desc_base(&child->thread.tls_array[FS_TLS]);
187 case offsetof(struct user_regs_struct, gs_base):
188 /*
189 * Exactly the same here as the %fs handling above.
190 */
191 if (child->thread.gs != 0)
192 return child->thread.gs;
193 seg = child->thread.gsindex;
194 if (child == current)
195 asm("movl %%gs,%0" : "=r" (seg));
196 if (seg != GS_TLS_SEL)
197 return 0;
198 return get_desc_base(&child->thread.tls_array[GS_TLS]);
199 case offsetof(struct user_regs_struct, flags):
200 /*
201 * If the debugger set TF, hide it from the readout.
202 */
203 val = regs->flags;
204 if (test_tsk_thread_flag(child, TIF_IA32))
205 val &= 0xffffffff;
206 if (test_tsk_thread_flag(child, TIF_FORCED_TF))
207 val &= ~X86_EFLAGS_TF;
208 return val;
209 default:
210 val = *pt_regs_access(regs, regno);
211 if (test_tsk_thread_flag(child, TIF_IA32))
212 val &= 0xffffffff;
213 return val;
214 }
215
216}
217
218unsigned long ptrace_get_debugreg(struct task_struct *child, int n)
219{
220 switch (n) {
221 case 0: return child->thread.debugreg0;
222 case 1: return child->thread.debugreg1;
223 case 2: return child->thread.debugreg2;
224 case 3: return child->thread.debugreg3;
225 case 6: return child->thread.debugreg6;
226 case 7: return child->thread.debugreg7;
227 }
228 return 0;
229}
230
231int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long data)
232{
233 int i;
234
235 if (n < 4) {
236 int dsize = test_tsk_thread_flag(child, TIF_IA32) ? 3 : 7;
237 if (unlikely(data >= TASK_SIZE_OF(child) - dsize))
238 return -EIO;
239 }
240
241 switch (n) {
242 case 0: child->thread.debugreg0 = data; break;
243 case 1: child->thread.debugreg1 = data; break;
244 case 2: child->thread.debugreg2 = data; break;
245 case 3: child->thread.debugreg3 = data; break;
246
247 case 6:
248 if (data >> 32)
249 return -EIO;
250 child->thread.debugreg6 = data;
251 break;
252
253 case 7:
254 /*
255 * See ptrace_32.c for an explanation of this awkward check.
256 */
257 data &= ~DR_CONTROL_RESERVED;
258 for (i = 0; i < 4; i++)
259 if ((0x5554 >> ((data >> (16 + 4*i)) & 0xf)) & 1)
260 return -EIO;
261 child->thread.debugreg7 = data;
262 if (data)
263 set_tsk_thread_flag(child, TIF_DEBUG);
264 else
265 clear_tsk_thread_flag(child, TIF_DEBUG);
266 break;
267 }
268
269 return 0;
270}
271
272long arch_ptrace(struct task_struct *child, long request, long addr, long data)
273{
274 long ret;
275 unsigned ui;
276
277 switch (request) {
278 /* when I and D space are separate, these will need to be fixed. */
279 case PTRACE_PEEKTEXT: /* read word at location addr. */
280 case PTRACE_PEEKDATA:
281 ret = generic_ptrace_peekdata(child, addr, data);
282 break;
283
284 /* read the word at location addr in the USER area. */
285 case PTRACE_PEEKUSR: {
286 unsigned long tmp;
287
288 ret = -EIO;
289 if ((addr & 7) ||
290 addr > sizeof(struct user) - 7)
291 break;
292
293 tmp = 0;
294 if (addr < sizeof(struct user_regs_struct))
295 tmp = getreg(child, addr);
296 else if (addr >= offsetof(struct user, u_debugreg[0])) {
297 addr -= offsetof(struct user, u_debugreg[0]);
298 tmp = ptrace_get_debugreg(child, addr / sizeof(long));
299 }
300
301 ret = put_user(tmp,(unsigned long __user *) data);
302 break;
303 }
304
305 /* when I and D space are separate, this will have to be fixed. */
306 case PTRACE_POKETEXT: /* write the word at location addr. */
307 case PTRACE_POKEDATA:
308 ret = generic_ptrace_pokedata(child, addr, data);
309 break;
310
311 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
312 ret = -EIO;
313 if ((addr & 7) ||
314 addr > sizeof(struct user) - 7)
315 break;
316
317 if (addr < sizeof(struct user_regs_struct))
318 ret = putreg(child, addr, data);
319 else if (addr >= offsetof(struct user, u_debugreg[0])) {
320 addr -= offsetof(struct user, u_debugreg[0]);
321 ret = ptrace_set_debugreg(child,
322 addr / sizeof(long), data);
323 }
324 break;
325
326#ifdef CONFIG_IA32_EMULATION
327 /* This makes only sense with 32bit programs. Allow a
328 64bit debugger to fully examine them too. Better
329 don't use it against 64bit processes, use
330 PTRACE_ARCH_PRCTL instead. */
331 case PTRACE_GET_THREAD_AREA:
332 if (addr < 0)
333 return -EIO;
334 ret = do_get_thread_area(child, addr,
335 (struct user_desc __user *) data);
336
337 break;
338 case PTRACE_SET_THREAD_AREA:
339 if (addr < 0)
340 return -EIO;
341 ret = do_set_thread_area(child, addr,
342 (struct user_desc __user *) data, 0);
343 break;
344#endif
345 /* normal 64bit interface to access TLS data.
346 Works just like arch_prctl, except that the arguments
347 are reversed. */
348 case PTRACE_ARCH_PRCTL:
349 ret = do_arch_prctl(child, data, addr);
350 break;
351
352 case PTRACE_GETREGS: { /* Get all gp regs from the child. */
353 if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
354 sizeof(struct user_regs_struct))) {
355 ret = -EIO;
356 break;
357 }
358 ret = 0;
359 for (ui = 0; ui < sizeof(struct user_regs_struct); ui += sizeof(long)) {
360 ret |= __put_user(getreg(child, ui),(unsigned long __user *) data);
361 data += sizeof(long);
362 }
363 break;
364 }
365
366 case PTRACE_SETREGS: { /* Set all gp regs in the child. */
367 unsigned long tmp;
368 if (!access_ok(VERIFY_READ, (unsigned __user *)data,
369 sizeof(struct user_regs_struct))) {
370 ret = -EIO;
371 break;
372 }
373 ret = 0;
374 for (ui = 0; ui < sizeof(struct user_regs_struct); ui += sizeof(long)) {
375 ret = __get_user(tmp, (unsigned long __user *) data);
376 if (ret)
377 break;
378 ret = putreg(child, ui, tmp);
379 if (ret)
380 break;
381 data += sizeof(long);
382 }
383 break;
384 }
385
386 case PTRACE_GETFPREGS: { /* Get the child extended FPU state. */
387 if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
388 sizeof(struct user_i387_struct))) {
389 ret = -EIO;
390 break;
391 }
392 ret = get_fpregs((struct user_i387_struct __user *)data, child);
393 break;
394 }
395
396 case PTRACE_SETFPREGS: { /* Set the child extended FPU state. */
397 if (!access_ok(VERIFY_READ, (unsigned __user *)data,
398 sizeof(struct user_i387_struct))) {
399 ret = -EIO;
400 break;
401 }
402 set_stopped_child_used_math(child);
403 ret = set_fpregs(child, (struct user_i387_struct __user *)data);
404 break;
405 }
406
407 default:
408 ret = ptrace_request(child, request, addr, data);
409 break;
410 }
411 return ret;
412}
413
414static void syscall_trace(struct pt_regs *regs)
415{
416
417#if 0
418 printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n",
419 current->comm,
420 regs->ip, regs->sp, regs->ax, regs->orig_ax, __builtin_return_address(0),
421 current_thread_info()->flags, current->ptrace);
422#endif
423
424 ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
425 ? 0x80 : 0));
426 /*
427 * this isn't the same as continuing with a signal, but it will do
428 * for normal use. strace only continues with a signal if the
429 * stopping signal is not SIGTRAP. -brl
430 */
431 if (current->exit_code) {
432 send_sig(current->exit_code, current, 1);
433 current->exit_code = 0;
434 }
435}
436
437asmlinkage void syscall_trace_enter(struct pt_regs *regs)
438{
439 /* do the secure computing check first */
440 secure_computing(regs->orig_ax);
441
442 if (test_thread_flag(TIF_SYSCALL_TRACE)
443 && (current->ptrace & PT_PTRACED))
444 syscall_trace(regs);
445
446 if (unlikely(current->audit_context)) {
447 if (test_thread_flag(TIF_IA32)) {
448 audit_syscall_entry(AUDIT_ARCH_I386,
449 regs->orig_ax,
450 regs->bx, regs->cx,
451 regs->dx, regs->si);
452 } else {
453 audit_syscall_entry(AUDIT_ARCH_X86_64,
454 regs->orig_ax,
455 regs->di, regs->si,
456 regs->dx, regs->r10);
457 }
458 }
459}
460
461asmlinkage void syscall_trace_leave(struct pt_regs *regs)
462{
463 if (unlikely(current->audit_context))
464 audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
465
466 if ((test_thread_flag(TIF_SYSCALL_TRACE)
467 || test_thread_flag(TIF_SINGLESTEP))
468 && (current->ptrace & PT_PTRACED))
469 syscall_trace(regs);
470}
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