2 * Copyright (c) 1994, Sean Eric Fagan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Sean Eric Fagan.
16 * 4. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include "opt_compat.h"
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/mutex.h>
41 #include <sys/syscallsubr.h>
42 #include <sys/sysent.h>
43 #include <sys/sysproto.h>
45 #include <sys/vnode.h>
46 #include <sys/ptrace.h>
48 #include <sys/malloc.h>
49 #include <sys/signalvar.h>
51 #include <machine/reg.h>
53 #include <security/audit/audit.h>
57 #include <vm/vm_extern.h>
58 #include <vm/vm_map.h>
59 #include <vm/vm_kern.h>
60 #include <vm/vm_object.h>
61 #include <vm/vm_page.h>
62 #include <vm/vm_pager.h>
63 #include <vm/vm_param.h>
65 #ifdef COMPAT_FREEBSD32
66 #include <sys/procfs.h>
67 #include <compat/freebsd32/freebsd32_signal.h>
69 struct ptrace_io_desc32 {
76 struct ptrace_vm_entry32 {
89 struct ptrace_lwpinfo32 {
90 lwpid_t pl_lwpid; /* LWP described. */
91 int pl_event; /* Event that stopped the LWP. */
92 int pl_flags; /* LWP flags. */
93 sigset_t pl_sigmask; /* LWP signal mask */
94 sigset_t pl_siglist; /* LWP pending signal */
95 struct siginfo32 pl_siginfo; /* siginfo for signal */
101 * Functions implemented using PROC_ACTION():
103 * proc_read_regs(proc, regs)
104 * Get the current user-visible register set from the process
105 * and copy it into the regs structure (<machine/reg.h>).
106 * The process is stopped at the time read_regs is called.
108 * proc_write_regs(proc, regs)
109 * Update the current register set from the passed in regs
110 * structure. Take care to avoid clobbering special CPU
111 * registers or privileged bits in the PSL.
112 * Depending on the architecture this may have fix-up work to do,
113 * especially if the IAR or PCW are modified.
114 * The process is stopped at the time write_regs is called.
116 * proc_read_fpregs, proc_write_fpregs
117 * deal with the floating point register set, otherwise as above.
119 * proc_read_dbregs, proc_write_dbregs
120 * deal with the processor debug register set, otherwise as above.
123 * Arrange for the process to trap after executing a single instruction.
126 #define PROC_ACTION(action) do { \
129 PROC_LOCK_ASSERT(td->td_proc, MA_OWNED); \
130 if ((td->td_proc->p_flag & P_INMEM) == 0) \
138 proc_read_regs(struct thread *td, struct reg *regs)
141 PROC_ACTION(fill_regs(td, regs));
145 proc_write_regs(struct thread *td, struct reg *regs)
148 PROC_ACTION(set_regs(td, regs));
152 proc_read_dbregs(struct thread *td, struct dbreg *dbregs)
155 PROC_ACTION(fill_dbregs(td, dbregs));
159 proc_write_dbregs(struct thread *td, struct dbreg *dbregs)
162 PROC_ACTION(set_dbregs(td, dbregs));
166 * Ptrace doesn't support fpregs at all, and there are no security holes
167 * or translations for fpregs, so we can just copy them.
170 proc_read_fpregs(struct thread *td, struct fpreg *fpregs)
173 PROC_ACTION(fill_fpregs(td, fpregs));
177 proc_write_fpregs(struct thread *td, struct fpreg *fpregs)
180 PROC_ACTION(set_fpregs(td, fpregs));
183 #ifdef COMPAT_FREEBSD32
184 /* For 32 bit binaries, we need to expose the 32 bit regs layouts. */
186 proc_read_regs32(struct thread *td, struct reg32 *regs32)
189 PROC_ACTION(fill_regs32(td, regs32));
193 proc_write_regs32(struct thread *td, struct reg32 *regs32)
196 PROC_ACTION(set_regs32(td, regs32));
200 proc_read_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
203 PROC_ACTION(fill_dbregs32(td, dbregs32));
207 proc_write_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
210 PROC_ACTION(set_dbregs32(td, dbregs32));
214 proc_read_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
217 PROC_ACTION(fill_fpregs32(td, fpregs32));
221 proc_write_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
224 PROC_ACTION(set_fpregs32(td, fpregs32));
229 proc_sstep(struct thread *td)
232 PROC_ACTION(ptrace_single_step(td));
236 proc_rwmem(struct proc *p, struct uio *uio)
239 vm_object_t backing_object, object;
240 vm_offset_t pageno; /* page number */
245 * Assert that someone has locked this vmspace. (Should be
246 * curthread but we can't assert that.) This keeps the process
247 * from exiting out from under us until this operation completes.
249 KASSERT(p->p_lock >= 1, ("%s: process %p (pid %d) not held", __func__,
255 map = &p->p_vmspace->vm_map;
257 writing = uio->uio_rw == UIO_WRITE;
258 reqprot = writing ? VM_PROT_COPY | VM_PROT_READ : VM_PROT_READ;
261 * Only map in one page at a time. We don't have to, but it
262 * makes things easier. This way is trivial - right?
267 int page_offset; /* offset into page */
268 vm_map_entry_t out_entry;
277 uva = (vm_offset_t)uio->uio_offset;
280 * Get the page number of this segment.
282 pageno = trunc_page(uva);
283 page_offset = uva - pageno;
286 * How many bytes to copy
288 len = min(PAGE_SIZE - page_offset, uio->uio_resid);
291 * Fault the page on behalf of the process
293 error = vm_fault(map, pageno, reqprot, VM_FAULT_NORMAL);
295 if (error == KERN_RESOURCE_SHORTAGE)
303 * Now we need to get the page. out_entry and wired
304 * aren't used. One would think the vm code
305 * would be a *bit* nicer... We use tmap because
306 * vm_map_lookup() can change the map argument.
309 error = vm_map_lookup(&tmap, pageno, reqprot, &out_entry,
310 &object, &pindex, &out_prot, &wired);
315 VM_OBJECT_LOCK(object);
316 while ((m = vm_page_lookup(object, pindex)) == NULL &&
318 (backing_object = object->backing_object) != NULL) {
320 * Allow fallback to backing objects if we are reading.
322 VM_OBJECT_LOCK(backing_object);
323 pindex += OFF_TO_IDX(object->backing_object_offset);
324 VM_OBJECT_UNLOCK(object);
325 object = backing_object;
327 if (writing && m != NULL) {
329 vm_pager_page_unswapped(m);
331 VM_OBJECT_UNLOCK(object);
333 vm_map_lookup_done(tmap, out_entry);
339 * Hold the page in memory.
346 * We're done with tmap now.
348 vm_map_lookup_done(tmap, out_entry);
351 * Now do the i/o move.
353 error = uiomove_fromphys(&m, page_offset, len, uio);
355 /* Make the I-cache coherent for breakpoints. */
356 if (!error && writing && (out_prot & VM_PROT_EXECUTE))
357 vm_sync_icache(map, uva, len);
366 } while (error == 0 && uio->uio_resid > 0);
372 ptrace_vm_entry(struct thread *td, struct proc *p, struct ptrace_vm_entry *pve)
376 vm_map_entry_t entry;
377 vm_object_t obj, tobj, lobj;
380 char *freepath, *fullpath;
382 int error, index, vfslocked;
387 vm = vmspace_acquire_ref(p);
389 vm_map_lock_read(map);
392 entry = map->header.next;
394 while (index < pve->pve_entry && entry != &map->header) {
398 if (index != pve->pve_entry) {
402 while (entry != &map->header &&
403 (entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0) {
407 if (entry == &map->header) {
412 /* We got an entry. */
413 pve->pve_entry = index + 1;
414 pve->pve_timestamp = map->timestamp;
415 pve->pve_start = entry->start;
416 pve->pve_end = entry->end - 1;
417 pve->pve_offset = entry->offset;
418 pve->pve_prot = entry->protection;
420 /* Backing object's path needed? */
421 if (pve->pve_pathlen == 0)
424 pathlen = pve->pve_pathlen;
425 pve->pve_pathlen = 0;
427 obj = entry->object.vm_object;
432 vm_map_unlock_read(map);
435 pve->pve_fsid = VNOVAL;
436 pve->pve_fileid = VNOVAL;
438 if (error == 0 && obj != NULL) {
440 for (tobj = obj; tobj != NULL; tobj = tobj->backing_object) {
442 VM_OBJECT_LOCK(tobj);
444 VM_OBJECT_UNLOCK(lobj);
446 pve->pve_offset += tobj->backing_object_offset;
448 vp = (lobj->type == OBJT_VNODE) ? lobj->handle : NULL;
452 VM_OBJECT_UNLOCK(lobj);
453 VM_OBJECT_UNLOCK(obj);
458 vn_fullpath(td, vp, &fullpath, &freepath);
459 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
460 vn_lock(vp, LK_SHARED | LK_RETRY);
461 if (VOP_GETATTR(vp, &vattr, td->td_ucred) == 0) {
462 pve->pve_fileid = vattr.va_fileid;
463 pve->pve_fsid = vattr.va_fsid;
466 VFS_UNLOCK_GIANT(vfslocked);
468 if (fullpath != NULL) {
469 pve->pve_pathlen = strlen(fullpath) + 1;
470 if (pve->pve_pathlen <= pathlen) {
471 error = copyout(fullpath, pve->pve_path,
474 error = ENAMETOOLONG;
476 if (freepath != NULL)
477 free(freepath, M_TEMP);
484 #ifdef COMPAT_FREEBSD32
486 ptrace_vm_entry32(struct thread *td, struct proc *p,
487 struct ptrace_vm_entry32 *pve32)
489 struct ptrace_vm_entry pve;
492 pve.pve_entry = pve32->pve_entry;
493 pve.pve_pathlen = pve32->pve_pathlen;
494 pve.pve_path = (void *)(uintptr_t)pve32->pve_path;
496 error = ptrace_vm_entry(td, p, &pve);
498 pve32->pve_entry = pve.pve_entry;
499 pve32->pve_timestamp = pve.pve_timestamp;
500 pve32->pve_start = pve.pve_start;
501 pve32->pve_end = pve.pve_end;
502 pve32->pve_offset = pve.pve_offset;
503 pve32->pve_prot = pve.pve_prot;
504 pve32->pve_fileid = pve.pve_fileid;
505 pve32->pve_fsid = pve.pve_fsid;
508 pve32->pve_pathlen = pve.pve_pathlen;
513 ptrace_lwpinfo_to32(const struct ptrace_lwpinfo *pl,
514 struct ptrace_lwpinfo32 *pl32)
517 pl32->pl_lwpid = pl->pl_lwpid;
518 pl32->pl_event = pl->pl_event;
519 pl32->pl_flags = pl->pl_flags;
520 pl32->pl_sigmask = pl->pl_sigmask;
521 pl32->pl_siglist = pl->pl_siglist;
522 siginfo_to_siginfo32(&pl->pl_siginfo, &pl32->pl_siginfo);
524 #endif /* COMPAT_FREEBSD32 */
527 * Process debugging system call.
529 #ifndef _SYS_SYSPROTO_H_
538 #ifdef COMPAT_FREEBSD32
540 * This CPP subterfuge is to try and reduce the number of ifdefs in
541 * the body of the code.
542 * COPYIN(uap->addr, &r.reg, sizeof r.reg);
544 * copyin(uap->addr, &r.reg, sizeof r.reg);
546 * copyin(uap->addr, &r.reg32, sizeof r.reg32);
547 * .. except this is done at runtime.
549 #define COPYIN(u, k, s) wrap32 ? \
550 copyin(u, k ## 32, s ## 32) : \
552 #define COPYOUT(k, u, s) wrap32 ? \
553 copyout(k ## 32, u, s ## 32) : \
556 #define COPYIN(u, k, s) copyin(u, k, s)
557 #define COPYOUT(k, u, s) copyout(k, u, s)
560 ptrace(struct thread *td, struct ptrace_args *uap)
563 * XXX this obfuscation is to reduce stack usage, but the register
564 * structs may be too large to put on the stack anyway.
567 struct ptrace_io_desc piod;
568 struct ptrace_lwpinfo pl;
569 struct ptrace_vm_entry pve;
573 #ifdef COMPAT_FREEBSD32
574 struct dbreg32 dbreg32;
575 struct fpreg32 fpreg32;
577 struct ptrace_io_desc32 piod32;
578 struct ptrace_lwpinfo32 pl32;
579 struct ptrace_vm_entry32 pve32;
584 #ifdef COMPAT_FREEBSD32
587 if (SV_CURPROC_FLAG(SV_ILP32))
590 AUDIT_ARG_PID(uap->pid);
591 AUDIT_ARG_CMD(uap->req);
592 AUDIT_ARG_VALUE(uap->data);
601 error = COPYIN(uap->addr, &r.reg, sizeof r.reg);
604 error = COPYIN(uap->addr, &r.fpreg, sizeof r.fpreg);
607 error = COPYIN(uap->addr, &r.dbreg, sizeof r.dbreg);
610 error = COPYIN(uap->addr, &r.piod, sizeof r.piod);
613 error = COPYIN(uap->addr, &r.pve, sizeof r.pve);
622 error = kern_ptrace(td, uap->req, uap->pid, addr, uap->data);
628 error = COPYOUT(&r.pve, uap->addr, sizeof r.pve);
631 error = COPYOUT(&r.piod, uap->addr, sizeof r.piod);
634 error = COPYOUT(&r.reg, uap->addr, sizeof r.reg);
637 error = COPYOUT(&r.fpreg, uap->addr, sizeof r.fpreg);
640 error = COPYOUT(&r.dbreg, uap->addr, sizeof r.dbreg);
643 error = copyout(&r.pl, uap->addr, uap->data);
652 #ifdef COMPAT_FREEBSD32
654 * PROC_READ(regs, td2, addr);
656 * proc_read_regs(td2, addr);
658 * proc_read_regs32(td2, addr);
659 * .. except this is done at runtime. There is an additional
660 * complication in that PROC_WRITE disallows 32 bit consumers
661 * from writing to 64 bit address space targets.
663 #define PROC_READ(w, t, a) wrap32 ? \
664 proc_read_ ## w ## 32(t, a) : \
665 proc_read_ ## w (t, a)
666 #define PROC_WRITE(w, t, a) wrap32 ? \
667 (safe ? proc_write_ ## w ## 32(t, a) : EINVAL ) : \
668 proc_write_ ## w (t, a)
670 #define PROC_READ(w, t, a) proc_read_ ## w (t, a)
671 #define PROC_WRITE(w, t, a) proc_write_ ## w (t, a)
675 kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
679 struct proc *curp, *p, *pp;
680 struct thread *td2 = NULL;
681 struct ptrace_io_desc *piod = NULL;
682 struct ptrace_lwpinfo *pl;
683 int error, write, tmp, num;
684 int proctree_locked = 0;
685 lwpid_t tid = 0, *buf;
686 #ifdef COMPAT_FREEBSD32
687 int wrap32 = 0, safe = 0;
688 struct ptrace_io_desc32 *piod32 = NULL;
689 struct ptrace_lwpinfo32 *pl32 = NULL;
690 struct ptrace_lwpinfo plr;
695 /* Lock proctree before locking the process. */
705 sx_xlock(&proctree_lock);
713 if (req == PT_TRACE_ME) {
717 if (pid <= PID_MAX) {
718 if ((p = pfind(pid)) == NULL) {
720 sx_xunlock(&proctree_lock);
724 /* this is slow, should be optimized */
725 sx_slock(&allproc_lock);
726 FOREACH_PROC_IN_SYSTEM(p) {
728 FOREACH_THREAD_IN_PROC(p, td2) {
729 if (td2->td_tid == pid)
733 break; /* proc lock held */
736 sx_sunlock(&allproc_lock);
739 sx_xunlock(&proctree_lock);
746 AUDIT_ARG_PROCESS(p);
748 if ((p->p_flag & P_WEXIT) != 0) {
752 if ((error = p_cansee(td, p)) != 0)
755 if ((error = p_candebug(td, p)) != 0)
759 * System processes can't be debugged.
761 if ((p->p_flag & P_SYSTEM) != 0) {
767 if ((p->p_flag & P_STOPPED_TRACE) != 0) {
768 KASSERT(p->p_xthread != NULL, ("NULL p_xthread"));
771 td2 = FIRST_THREAD_IN_PROC(p);
776 #ifdef COMPAT_FREEBSD32
778 * Test if we're a 32 bit client and what the target is.
779 * Set the wrap controls accordingly.
781 if (SV_CURPROC_FLAG(SV_ILP32)) {
782 if (td2->td_proc->p_sysent->sv_flags & SV_ILP32)
797 if (p->p_pid == td->td_proc->p_pid) {
803 if (p->p_flag & P_TRACED) {
808 /* Can't trace an ancestor if you're being traced. */
809 if (curp->p_flag & P_TRACED) {
810 for (pp = curp->p_pptr; pp != NULL; pp = pp->p_pptr) {
823 /* Allow thread to clear single step for itself */
824 if (td->td_tid == tid)
829 /* not being traced... */
830 if ((p->p_flag & P_TRACED) == 0) {
835 /* not being traced by YOU */
836 if (p->p_pptr != td->td_proc) {
841 /* not currently stopped */
842 if ((p->p_flag & (P_STOPPED_SIG | P_STOPPED_TRACE)) == 0 ||
843 p->p_suspcount != p->p_numthreads ||
844 (p->p_flag & P_WAITED) == 0) {
849 if ((p->p_flag & P_STOPPED_TRACE) == 0) {
850 static int count = 0;
852 printf("P_STOPPED_TRACE not set.\n");
859 /* Keep this process around until we finish this request. */
864 * Single step fixup ala procfs
870 * Actually do the requests
873 td->td_retval[0] = 0;
877 /* set my trace flag and "owner" so it can read/write me */
878 p->p_flag |= P_TRACED;
879 p->p_oppid = p->p_pptr->p_pid;
883 /* security check done above */
884 p->p_flag |= P_TRACED;
885 p->p_oppid = p->p_pptr->p_pid;
886 if (p->p_pptr != td->td_proc)
887 proc_reparent(p, td->td_proc);
889 goto sendsig; /* in PT_CONTINUE below */
892 error = ptrace_clear_single_step(td2);
896 error = ptrace_single_step(td2);
900 td2->td_dbgflags |= TDB_SUSPEND;
902 td2->td_flags |= TDF_NEEDSUSPCHK;
907 td2->td_dbgflags &= ~TDB_SUSPEND;
916 /* Zero means do not send any signal */
917 if (data < 0 || data > _SIG_MAXSIG) {
924 error = ptrace_single_step(td2);
932 if (addr != (void *)1) {
933 error = ptrace_set_pc(td2,
934 (u_long)(uintfptr_t)addr);
940 p->p_stops |= S_PT_SCE;
943 p->p_stops |= S_PT_SCX;
946 p->p_stops |= S_PT_SCE | S_PT_SCX;
951 /* reset process parent */
952 if (p->p_oppid != p->p_pptr->p_pid) {
955 PROC_LOCK(p->p_pptr);
956 sigqueue_take(p->p_ksi);
957 PROC_UNLOCK(p->p_pptr);
960 pp = pfind(p->p_oppid);
966 proc_reparent(p, pp);
968 p->p_sigparent = SIGCHLD;
970 p->p_flag &= ~(P_TRACED | P_WAITED);
973 /* should we send SIGCHLD? */
974 /* childproc_continued(p); */
979 if (proctree_locked) {
980 sx_xunlock(&proctree_lock);
985 if ((p->p_flag & (P_STOPPED_SIG | P_STOPPED_TRACE)) != 0) {
986 /* deliver or queue signal */
987 td2->td_dbgflags &= ~TDB_XSIG;
990 if (req == PT_DETACH) {
992 FOREACH_THREAD_IN_PROC(p, td3) {
993 td3->td_dbgflags &= ~TDB_SUSPEND;
997 * unsuspend all threads, to not let a thread run,
998 * you should use PT_SUSPEND to suspend it before
999 * continuing process.
1002 p->p_flag &= ~(P_STOPPED_TRACE|P_STOPPED_SIG|P_WAITED);
1003 thread_unsuspend(p);
1013 td2->td_dbgflags |= TDB_USERWR;
1020 /* write = 0 set above */
1021 iov.iov_base = write ? (caddr_t)&data : (caddr_t)&tmp;
1022 iov.iov_len = sizeof(int);
1025 uio.uio_offset = (off_t)(uintptr_t)addr;
1026 uio.uio_resid = sizeof(int);
1027 uio.uio_segflg = UIO_SYSSPACE; /* i.e.: the uap */
1028 uio.uio_rw = write ? UIO_WRITE : UIO_READ;
1030 error = proc_rwmem(p, &uio);
1031 if (uio.uio_resid != 0) {
1033 * XXX proc_rwmem() doesn't currently return ENOSPC,
1034 * so I think write() can bogusly return 0.
1035 * XXX what happens for short writes? We don't want
1036 * to write partial data.
1037 * XXX proc_rwmem() returns EPERM for other invalid
1038 * addresses. Convert this to EINVAL. Does this
1039 * clobber returns of EPERM for other reasons?
1041 if (error == 0 || error == ENOSPC || error == EPERM)
1042 error = EINVAL; /* EOF */
1045 td->td_retval[0] = tmp;
1050 #ifdef COMPAT_FREEBSD32
1053 iov.iov_base = (void *)(uintptr_t)piod32->piod_addr;
1054 iov.iov_len = piod32->piod_len;
1055 uio.uio_offset = (off_t)(uintptr_t)piod32->piod_offs;
1056 uio.uio_resid = piod32->piod_len;
1061 iov.iov_base = piod->piod_addr;
1062 iov.iov_len = piod->piod_len;
1063 uio.uio_offset = (off_t)(uintptr_t)piod->piod_offs;
1064 uio.uio_resid = piod->piod_len;
1068 uio.uio_segflg = UIO_USERSPACE;
1070 #ifdef COMPAT_FREEBSD32
1071 tmp = wrap32 ? piod32->piod_op : piod->piod_op;
1073 tmp = piod->piod_op;
1078 uio.uio_rw = UIO_READ;
1082 td2->td_dbgflags |= TDB_USERWR;
1083 uio.uio_rw = UIO_WRITE;
1090 error = proc_rwmem(p, &uio);
1091 #ifdef COMPAT_FREEBSD32
1093 piod32->piod_len -= uio.uio_resid;
1096 piod->piod_len -= uio.uio_resid;
1102 goto sendsig; /* in PT_CONTINUE above */
1105 td2->td_dbgflags |= TDB_USERWR;
1106 error = PROC_WRITE(regs, td2, addr);
1110 error = PROC_READ(regs, td2, addr);
1114 td2->td_dbgflags |= TDB_USERWR;
1115 error = PROC_WRITE(fpregs, td2, addr);
1119 error = PROC_READ(fpregs, td2, addr);
1123 td2->td_dbgflags |= TDB_USERWR;
1124 error = PROC_WRITE(dbregs, td2, addr);
1128 error = PROC_READ(dbregs, td2, addr);
1133 #ifdef COMPAT_FREEBSD32
1134 (!wrap32 && data > sizeof(*pl)) ||
1135 (wrap32 && data > sizeof(*pl32))) {
1137 data > sizeof(*pl)) {
1142 #ifdef COMPAT_FREEBSD32
1149 pl->pl_lwpid = td2->td_tid;
1151 if (td2->td_dbgflags & TDB_XSIG) {
1152 pl->pl_event = PL_EVENT_SIGNAL;
1153 if (td2->td_dbgksi.ksi_signo != 0 &&
1154 #ifdef COMPAT_FREEBSD32
1155 ((!wrap32 && data >= offsetof(struct ptrace_lwpinfo,
1156 pl_siginfo) + sizeof(pl->pl_siginfo)) ||
1157 (wrap32 && data >= offsetof(struct ptrace_lwpinfo32,
1158 pl_siginfo) + sizeof(struct siginfo32)))
1160 data >= offsetof(struct ptrace_lwpinfo, pl_siginfo)
1161 + sizeof(pl->pl_siginfo)
1164 pl->pl_flags |= PL_FLAG_SI;
1165 pl->pl_siginfo = td2->td_dbgksi.ksi_info;
1168 if ((pl->pl_flags & PL_FLAG_SI) == 0)
1169 bzero(&pl->pl_siginfo, sizeof(pl->pl_siginfo));
1170 if (td2->td_dbgflags & TDB_SCE)
1171 pl->pl_flags |= PL_FLAG_SCE;
1172 else if (td2->td_dbgflags & TDB_SCX)
1173 pl->pl_flags |= PL_FLAG_SCX;
1174 if (td2->td_dbgflags & TDB_EXEC)
1175 pl->pl_flags |= PL_FLAG_EXEC;
1176 pl->pl_sigmask = td2->td_sigmask;
1177 pl->pl_siglist = td2->td_siglist;
1178 #ifdef COMPAT_FREEBSD32
1180 ptrace_lwpinfo_to32(pl, pl32);
1185 td->td_retval[0] = p->p_numthreads;
1193 num = imin(p->p_numthreads, data);
1195 buf = malloc(num * sizeof(lwpid_t), M_TEMP, M_WAITOK);
1198 FOREACH_THREAD_IN_PROC(p, td2) {
1201 buf[tmp++] = td2->td_tid;
1204 error = copyout(buf, addr, tmp * sizeof(lwpid_t));
1207 td->td_retval[0] = tmp;
1211 case PT_VM_TIMESTAMP:
1212 td->td_retval[0] = p->p_vmspace->vm_map.timestamp;
1217 #ifdef COMPAT_FREEBSD32
1219 error = ptrace_vm_entry32(td, p, addr);
1222 error = ptrace_vm_entry(td, p, addr);
1227 #ifdef __HAVE_PTRACE_MACHDEP
1228 if (req >= PT_FIRSTMACH) {
1230 error = cpu_ptrace(td2, req, addr, data);
1234 /* Unknown request. */
1240 /* Drop our hold on this process now that the request has completed. */
1244 if (proctree_locked)
1245 sx_xunlock(&proctree_lock);
1252 * Stop a process because of a debugging event;
1253 * stay stopped until p->p_step is cleared
1254 * (cleared by PIOCCONT in procfs).
1257 stopevent(struct proc *p, unsigned int event, unsigned int val)
1260 PROC_LOCK_ASSERT(p, MA_OWNED);
1264 p->p_xthread = NULL;
1265 p->p_stype = event; /* Which event caused the stop? */
1266 wakeup(&p->p_stype); /* Wake up any PIOCWAIT'ing procs */
1267 msleep(&p->p_step, &p->p_mtx, PWAIT, "stopevent", 0);
1268 } while (p->p_step);