powerpc/ptrace/ptrace-hwbreak.c

52 static void get_dbginfo(pid_t child_pid, struct ppc_debug_info *dbginfo)
54 	if (ptrace(PPC_PTRACE_GETHWDBGINFO, child_pid, NULL, dbginfo)) {
212 static void check_success(pid_t child_pid, const char *name, const char *type,
224 	ptrace(PTRACE_GETSIGINFO, child_pid, NULL, &siginfo);
241 		ptrace(PTRACE_SINGLESTEP, child_pid, NULL, 0);
246 static void ptrace_set_debugreg(pid_t child_pid, unsigned long wp_addr)
248 	if (ptrace(PTRACE_SET_DEBUGREG, child_pid, 0, wp_addr)) {
254 static int ptrace_sethwdebug(pid_t child_pid, struct ppc_hw_breakpoint *info)
256 	int wh = ptrace(PPC_PTRACE_SETHWDEBUG, child_pid, 0, info);
265 static void ptrace_delhwdebug(pid_t child_pid, int wh)
267 	if (ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, wh) < 0) {
277 static int test_set_debugreg(pid_t child_pid)
288 		ptrace_set_debugreg(child_pid, wp_addr);
289 		ptrace(PTRACE_CONT, child_pid, NULL, 0);
290 		check_success(child_pid, name, "WO", wp_addr, len);
298 		ptrace_set_debugreg(child_pid, wp_addr);
299 		ptrace(PTRACE_CONT, child_pid, NULL, 0);
300 		check_success(child_pid, name, "RO", wp_addr, len);
309 		ptrace_set_debugreg(child_pid, wp_addr);
310 		ptrace(PTRACE_CONT, child_pid, NULL, 0);
311 		check_success(child_pid, name, "RW", wp_addr, len);
314 	ptrace_set_debugreg(child_pid, 0);
318 static int test_set_debugreg_kernel_userspace(pid_t child_pid)
328 	ptrace_set_debugreg(child_pid, wp_addr);
329 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
330 	check_success(child_pid, name, "Kernel Access Userspace", wp_addr, 8);
332 	ptrace_set_debugreg(child_pid, 0);
351 static void test_sethwdebug_exact(pid_t child_pid)
361 	wh = ptrace_sethwdebug(child_pid, &info);
362 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
363 	check_success(child_pid, name, "WO", wp_addr, len);
364 	ptrace_delhwdebug(child_pid, wh);
368 	wh = ptrace_sethwdebug(child_pid, &info);
369 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
370 	check_success(child_pid, name, "RO", wp_addr, len);
371 	ptrace_delhwdebug(child_pid, wh);
375 	wh = ptrace_sethwdebug(child_pid, &info);
376 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
377 	check_success(child_pid, name, "RW", wp_addr, len);
378 	ptrace_delhwdebug(child_pid, wh);
381 static void test_sethwdebug_exact_kernel_userspace(pid_t child_pid)
391 	wh = ptrace_sethwdebug(child_pid, &info);
392 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
393 	check_success(child_pid, name, "Kernel Access Userspace", wp_addr, len);
394 	ptrace_delhwdebug(child_pid, wh);
397 static void test_sethwdebug_range_aligned(pid_t child_pid)
409 	wh = ptrace_sethwdebug(child_pid, &info);
410 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
411 	check_success(child_pid, name, "WO", wp_addr, len);
412 	ptrace_delhwdebug(child_pid, wh);
418 	wh = ptrace_sethwdebug(child_pid, &info);
419 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
420 	check_success(child_pid, name, "RO", wp_addr, len);
421 	ptrace_delhwdebug(child_pid, wh);
427 	wh = ptrace_sethwdebug(child_pid, &info);
428 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
429 	check_success(child_pid, name, "RW", wp_addr, len);
430 	ptrace_delhwdebug(child_pid, wh);
433 static void test_multi_sethwdebug_range(pid_t child_pid)
450 	wh1 = ptrace_sethwdebug(child_pid, &info1);
453 	wh2 = ptrace_sethwdebug(child_pid, &info2);
455 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
456 	check_success(child_pid, name1, "WO", wp_addr1, len1);
458 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
459 	check_success(child_pid, name2, "RO", wp_addr2, len2);
461 	ptrace_delhwdebug(child_pid, wh1);
462 	ptrace_delhwdebug(child_pid, wh2);
465 static void test_multi_sethwdebug_range_dawr_overlap(pid_t child_pid)
481 	wh1 = ptrace_sethwdebug(child_pid, &info1);
484 	wh2 = ptrace_sethwdebug(child_pid, &info2);
486 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
487 	check_success(child_pid, name, "WO", wp_addr1, len1);
489 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
490 	check_success(child_pid, name, "RO", wp_addr2, len2);
492 	ptrace_delhwdebug(child_pid, wh1);
493 	ptrace_delhwdebug(child_pid, wh2);
496 static void test_sethwdebug_range_unaligned(pid_t child_pid)
508 	wh = ptrace_sethwdebug(child_pid, &info);
509 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
510 	check_success(child_pid, name, "WO", wp_addr, len);
511 	ptrace_delhwdebug(child_pid, wh);
517 	wh = ptrace_sethwdebug(child_pid, &info);
518 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
519 	check_success(child_pid, name, "RO", wp_addr, len);
520 	ptrace_delhwdebug(child_pid, wh);
526 	wh = ptrace_sethwdebug(child_pid, &info);
527 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
528 	check_success(child_pid, name, "RW", wp_addr, len);
529 	ptrace_delhwdebug(child_pid, wh);
533 static void test_sethwdebug_range_unaligned_dar(pid_t child_pid)
545 	wh = ptrace_sethwdebug(child_pid, &info);
546 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
547 	check_success(child_pid, name, "RW", wp_addr, len);
548 	ptrace_delhwdebug(child_pid, wh);
551 static void test_sethwdebug_dawr_max_range(pid_t child_pid)
563 	wh = ptrace_sethwdebug(child_pid, &info);
564 	ptrace(PTRACE_CONT, child_pid, NULL, 0);
565 	check_success(child_pid, name, "RW", wp_addr, len);
566 	ptrace_delhwdebug(child_pid, wh);
571 run_tests(pid_t child_pid, struct ppc_debug_info *dbginfo, bool dawr)
573 	test_set_debugreg(child_pid);
574 	test_set_debugreg_kernel_userspace(child_pid);
575 	test_sethwdebug_exact(child_pid);
576 	test_sethwdebug_exact_kernel_userspace(child_pid);
578 		test_sethwdebug_range_aligned(child_pid);
580 			test_sethwdebug_range_unaligned(child_pid);
581 			test_sethwdebug_range_unaligned_dar(child_pid);
582 			test_sethwdebug_dawr_max_range(child_pid);
584 				test_multi_sethwdebug_range(child_pid);
585 				test_multi_sethwdebug_range_dawr_overlap(child_pid);
593 	pid_t child_pid;
597 	child_pid = fork();
598 	if (!child_pid) {
605 	get_dbginfo(child_pid, &dbginfo);
609 	run_tests(child_pid, &dbginfo, dawr);
612 	ptrace(PTRACE_CONT, child_pid, NULL, 0);