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_param.h>
64 #ifdef COMPAT_FREEBSD32
65 #include <sys/procfs.h>
66 #include <compat/freebsd32/freebsd32_signal.h>
68 struct ptrace_io_desc32 {
75 struct ptrace_vm_entry32 {
88 struct ptrace_lwpinfo32 {
89 lwpid_t pl_lwpid; /* LWP described. */
90 int pl_event; /* Event that stopped the LWP. */
91 int pl_flags; /* LWP flags. */
92 sigset_t pl_sigmask; /* LWP signal mask */
93 sigset_t pl_siglist; /* LWP pending signal */
94 struct siginfo32 pl_siginfo; /* siginfo for signal */
100 * Functions implemented using PROC_ACTION():
102 * proc_read_regs(proc, regs)
103 * Get the current user-visible register set from the process
104 * and copy it into the regs structure (<machine/reg.h>).
105 * The process is stopped at the time read_regs is called.
107 * proc_write_regs(proc, regs)
108 * Update the current register set from the passed in regs
109 * structure. Take care to avoid clobbering special CPU
110 * registers or privileged bits in the PSL.
111 * Depending on the architecture this may have fix-up work to do,
112 * especially if the IAR or PCW are modified.
113 * The process is stopped at the time write_regs is called.
115 * proc_read_fpregs, proc_write_fpregs
116 * deal with the floating point register set, otherwise as above.
118 * proc_read_dbregs, proc_write_dbregs
119 * deal with the processor debug register set, otherwise as above.
122 * Arrange for the process to trap after executing a single instruction.
125 #define PROC_ACTION(action) do { \
128 PROC_LOCK_ASSERT(td->td_proc, MA_OWNED); \
129 if ((td->td_proc->p_flag & P_INMEM) == 0) \
137 proc_read_regs(struct thread *td, struct reg *regs)
140 PROC_ACTION(fill_regs(td, regs));
144 proc_write_regs(struct thread *td, struct reg *regs)
147 PROC_ACTION(set_regs(td, regs));
151 proc_read_dbregs(struct thread *td, struct dbreg *dbregs)
154 PROC_ACTION(fill_dbregs(td, dbregs));
158 proc_write_dbregs(struct thread *td, struct dbreg *dbregs)
161 PROC_ACTION(set_dbregs(td, dbregs));
165 * Ptrace doesn't support fpregs at all, and there are no security holes
166 * or translations for fpregs, so we can just copy them.
169 proc_read_fpregs(struct thread *td, struct fpreg *fpregs)
172 PROC_ACTION(fill_fpregs(td, fpregs));
176 proc_write_fpregs(struct thread *td, struct fpreg *fpregs)
179 PROC_ACTION(set_fpregs(td, fpregs));
182 #ifdef COMPAT_FREEBSD32
183 /* For 32 bit binaries, we need to expose the 32 bit regs layouts. */
185 proc_read_regs32(struct thread *td, struct reg32 *regs32)
188 PROC_ACTION(fill_regs32(td, regs32));
192 proc_write_regs32(struct thread *td, struct reg32 *regs32)
195 PROC_ACTION(set_regs32(td, regs32));
199 proc_read_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
202 PROC_ACTION(fill_dbregs32(td, dbregs32));
206 proc_write_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
209 PROC_ACTION(set_dbregs32(td, dbregs32));
213 proc_read_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
216 PROC_ACTION(fill_fpregs32(td, fpregs32));
220 proc_write_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
223 PROC_ACTION(set_fpregs32(td, fpregs32));
228 proc_sstep(struct thread *td)
231 PROC_ACTION(ptrace_single_step(td));
235 proc_rwmem(struct proc *p, struct uio *uio)
238 vm_object_t backing_object, object = NULL;
239 vm_offset_t pageno = 0; /* page number */
241 int error, fault_flags, writing;
244 * Assert that someone has locked this vmspace. (Should be
245 * curthread but we can't assert that.) This keeps the process
246 * from exiting out from under us until this operation completes.
248 KASSERT(p->p_lock >= 1, ("%s: process %p (pid %d) not held", __func__,
254 map = &p->p_vmspace->vm_map;
256 writing = uio->uio_rw == UIO_WRITE;
257 reqprot = writing ? (VM_PROT_WRITE | VM_PROT_OVERRIDE_WRITE) :
259 fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL;
262 * Only map in one page at a time. We don't have to, but it
263 * makes things easier. This way is trivial - right?
268 int page_offset; /* offset into page */
269 vm_map_entry_t out_entry;
278 uva = (vm_offset_t)uio->uio_offset;
281 * Get the page number of this segment.
283 pageno = trunc_page(uva);
284 page_offset = uva - pageno;
287 * How many bytes to copy
289 len = min(PAGE_SIZE - page_offset, uio->uio_resid);
292 * Fault the page on behalf of the process
294 error = vm_fault(map, pageno, reqprot, fault_flags);
296 if (error == KERN_RESOURCE_SHORTAGE)
304 * Now we need to get the page. out_entry, out_prot, wired,
305 * and single_use aren't used. One would think the vm code
306 * would be a *bit* nicer... We use tmap because
307 * vm_map_lookup() can change the map argument.
310 error = vm_map_lookup(&tmap, pageno, reqprot, &out_entry,
311 &object, &pindex, &out_prot, &wired);
316 VM_OBJECT_LOCK(object);
317 while ((m = vm_page_lookup(object, pindex)) == NULL &&
319 (backing_object = object->backing_object) != NULL) {
321 * Allow fallback to backing objects if we are reading.
323 VM_OBJECT_LOCK(backing_object);
324 pindex += OFF_TO_IDX(object->backing_object_offset);
325 VM_OBJECT_UNLOCK(object);
326 object = backing_object;
328 VM_OBJECT_UNLOCK(object);
330 vm_map_lookup_done(tmap, out_entry);
336 * Hold the page in memory.
338 vm_page_lock_queues();
340 vm_page_unlock_queues();
343 * We're done with tmap now.
345 vm_map_lookup_done(tmap, out_entry);
348 * Now do the i/o move.
350 error = uiomove_fromphys(&m, page_offset, len, uio);
352 /* Make the I-cache coherent for breakpoints. */
353 if (!error && writing && (out_prot & VM_PROT_EXECUTE))
354 vm_sync_icache(map, uva, len);
359 vm_page_lock_queues();
361 vm_page_unlock_queues();
363 } while (error == 0 && uio->uio_resid > 0);
369 ptrace_vm_entry(struct thread *td, struct proc *p, struct ptrace_vm_entry *pve)
373 vm_map_entry_t entry;
374 vm_object_t obj, tobj, lobj;
377 char *freepath, *fullpath;
379 int error, index, vfslocked;
384 vm = vmspace_acquire_ref(p);
386 vm_map_lock_read(map);
389 entry = map->header.next;
391 while (index < pve->pve_entry && entry != &map->header) {
395 if (index != pve->pve_entry) {
399 while (entry != &map->header &&
400 (entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0) {
404 if (entry == &map->header) {
409 /* We got an entry. */
410 pve->pve_entry = index + 1;
411 pve->pve_timestamp = map->timestamp;
412 pve->pve_start = entry->start;
413 pve->pve_end = entry->end - 1;
414 pve->pve_offset = entry->offset;
415 pve->pve_prot = entry->protection;
417 /* Backing object's path needed? */
418 if (pve->pve_pathlen == 0)
421 pathlen = pve->pve_pathlen;
422 pve->pve_pathlen = 0;
424 obj = entry->object.vm_object;
429 vm_map_unlock_read(map);
432 pve->pve_fsid = VNOVAL;
433 pve->pve_fileid = VNOVAL;
435 if (error == 0 && obj != NULL) {
437 for (tobj = obj; tobj != NULL; tobj = tobj->backing_object) {
439 VM_OBJECT_LOCK(tobj);
441 VM_OBJECT_UNLOCK(lobj);
443 pve->pve_offset += tobj->backing_object_offset;
445 vp = (lobj->type == OBJT_VNODE) ? lobj->handle : NULL;
449 VM_OBJECT_UNLOCK(lobj);
450 VM_OBJECT_UNLOCK(obj);
455 vn_fullpath(td, vp, &fullpath, &freepath);
456 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
457 vn_lock(vp, LK_SHARED | LK_RETRY);
458 if (VOP_GETATTR(vp, &vattr, td->td_ucred) == 0) {
459 pve->pve_fileid = vattr.va_fileid;
460 pve->pve_fsid = vattr.va_fsid;
463 VFS_UNLOCK_GIANT(vfslocked);
465 if (fullpath != NULL) {
466 pve->pve_pathlen = strlen(fullpath) + 1;
467 if (pve->pve_pathlen <= pathlen) {
468 error = copyout(fullpath, pve->pve_path,
471 error = ENAMETOOLONG;
473 if (freepath != NULL)
474 free(freepath, M_TEMP);
481 #ifdef COMPAT_FREEBSD32
483 ptrace_vm_entry32(struct thread *td, struct proc *p,
484 struct ptrace_vm_entry32 *pve32)
486 struct ptrace_vm_entry pve;
489 pve.pve_entry = pve32->pve_entry;
490 pve.pve_pathlen = pve32->pve_pathlen;
491 pve.pve_path = (void *)(uintptr_t)pve32->pve_path;
493 error = ptrace_vm_entry(td, p, &pve);
495 pve32->pve_entry = pve.pve_entry;
496 pve32->pve_timestamp = pve.pve_timestamp;
497 pve32->pve_start = pve.pve_start;
498 pve32->pve_end = pve.pve_end;
499 pve32->pve_offset = pve.pve_offset;
500 pve32->pve_prot = pve.pve_prot;
501 pve32->pve_fileid = pve.pve_fileid;
502 pve32->pve_fsid = pve.pve_fsid;
505 pve32->pve_pathlen = pve.pve_pathlen;
510 ptrace_lwpinfo_to32(const struct ptrace_lwpinfo *pl,
511 struct ptrace_lwpinfo32 *pl32)
514 pl32->pl_lwpid = pl->pl_lwpid;
515 pl32->pl_event = pl->pl_event;
516 pl32->pl_flags = pl->pl_flags;
517 pl32->pl_sigmask = pl->pl_sigmask;
518 pl32->pl_siglist = pl->pl_siglist;
519 siginfo_to_siginfo32(&pl->pl_siginfo, &pl32->pl_siginfo);
521 #endif /* COMPAT_FREEBSD32 */
524 * Process debugging system call.
526 #ifndef _SYS_SYSPROTO_H_
535 #ifdef COMPAT_FREEBSD32
537 * This CPP subterfuge is to try and reduce the number of ifdefs in
538 * the body of the code.
539 * COPYIN(uap->addr, &r.reg, sizeof r.reg);
541 * copyin(uap->addr, &r.reg, sizeof r.reg);
543 * copyin(uap->addr, &r.reg32, sizeof r.reg32);
544 * .. except this is done at runtime.
546 #define COPYIN(u, k, s) wrap32 ? \
547 copyin(u, k ## 32, s ## 32) : \
549 #define COPYOUT(k, u, s) wrap32 ? \
550 copyout(k ## 32, u, s ## 32) : \
553 #define COPYIN(u, k, s) copyin(u, k, s)
554 #define COPYOUT(k, u, s) copyout(k, u, s)
557 ptrace(struct thread *td, struct ptrace_args *uap)
560 * XXX this obfuscation is to reduce stack usage, but the register
561 * structs may be too large to put on the stack anyway.
564 struct ptrace_io_desc piod;
565 struct ptrace_lwpinfo pl;
566 struct ptrace_vm_entry pve;
570 #ifdef COMPAT_FREEBSD32
571 struct dbreg32 dbreg32;
572 struct fpreg32 fpreg32;
574 struct ptrace_io_desc32 piod32;
575 struct ptrace_lwpinfo32 pl32;
576 struct ptrace_vm_entry32 pve32;
581 #ifdef COMPAT_FREEBSD32
584 if (SV_CURPROC_FLAG(SV_ILP32))
587 AUDIT_ARG_PID(uap->pid);
588 AUDIT_ARG_CMD(uap->req);
589 AUDIT_ARG_VALUE(uap->data);
598 error = COPYIN(uap->addr, &r.reg, sizeof r.reg);
601 error = COPYIN(uap->addr, &r.fpreg, sizeof r.fpreg);
604 error = COPYIN(uap->addr, &r.dbreg, sizeof r.dbreg);
607 error = COPYIN(uap->addr, &r.piod, sizeof r.piod);
610 error = COPYIN(uap->addr, &r.pve, sizeof r.pve);
619 error = kern_ptrace(td, uap->req, uap->pid, addr, uap->data);
625 error = COPYOUT(&r.pve, uap->addr, sizeof r.pve);
628 error = COPYOUT(&r.piod, uap->addr, sizeof r.piod);
631 error = COPYOUT(&r.reg, uap->addr, sizeof r.reg);
634 error = COPYOUT(&r.fpreg, uap->addr, sizeof r.fpreg);
637 error = COPYOUT(&r.dbreg, uap->addr, sizeof r.dbreg);
640 error = copyout(&r.pl, uap->addr, uap->data);
649 #ifdef COMPAT_FREEBSD32
651 * PROC_READ(regs, td2, addr);
653 * proc_read_regs(td2, addr);
655 * proc_read_regs32(td2, addr);
656 * .. except this is done at runtime. There is an additional
657 * complication in that PROC_WRITE disallows 32 bit consumers
658 * from writing to 64 bit address space targets.
660 #define PROC_READ(w, t, a) wrap32 ? \
661 proc_read_ ## w ## 32(t, a) : \
662 proc_read_ ## w (t, a)
663 #define PROC_WRITE(w, t, a) wrap32 ? \
664 (safe ? proc_write_ ## w ## 32(t, a) : EINVAL ) : \
665 proc_write_ ## w (t, a)
667 #define PROC_READ(w, t, a) proc_read_ ## w (t, a)
668 #define PROC_WRITE(w, t, a) proc_write_ ## w (t, a)
672 kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
676 struct proc *curp, *p, *pp;
677 struct thread *td2 = NULL;
678 struct ptrace_io_desc *piod = NULL;
679 struct ptrace_lwpinfo *pl;
680 int error, write, tmp, num;
681 int proctree_locked = 0;
682 lwpid_t tid = 0, *buf;
683 #ifdef COMPAT_FREEBSD32
684 int wrap32 = 0, safe = 0;
685 struct ptrace_io_desc32 *piod32 = NULL;
686 struct ptrace_lwpinfo32 *pl32 = NULL;
687 struct ptrace_lwpinfo plr;
692 /* Lock proctree before locking the process. */
702 sx_xlock(&proctree_lock);
710 if (req == PT_TRACE_ME) {
714 if (pid <= PID_MAX) {
715 if ((p = pfind(pid)) == NULL) {
717 sx_xunlock(&proctree_lock);
721 /* this is slow, should be optimized */
722 sx_slock(&allproc_lock);
723 FOREACH_PROC_IN_SYSTEM(p) {
725 FOREACH_THREAD_IN_PROC(p, td2) {
726 if (td2->td_tid == pid)
730 break; /* proc lock held */
733 sx_sunlock(&allproc_lock);
736 sx_xunlock(&proctree_lock);
743 AUDIT_ARG_PROCESS(p);
745 if ((p->p_flag & P_WEXIT) != 0) {
749 if ((error = p_cansee(td, p)) != 0)
752 if ((error = p_candebug(td, p)) != 0)
756 * System processes can't be debugged.
758 if ((p->p_flag & P_SYSTEM) != 0) {
764 if ((p->p_flag & P_STOPPED_TRACE) != 0) {
765 KASSERT(p->p_xthread != NULL, ("NULL p_xthread"));
768 td2 = FIRST_THREAD_IN_PROC(p);
773 #ifdef COMPAT_FREEBSD32
775 * Test if we're a 32 bit client and what the target is.
776 * Set the wrap controls accordingly.
778 if (SV_CURPROC_FLAG(SV_ILP32)) {
779 if (td2->td_proc->p_sysent->sv_flags & SV_ILP32)
794 if (p->p_pid == td->td_proc->p_pid) {
800 if (p->p_flag & P_TRACED) {
805 /* Can't trace an ancestor if you're being traced. */
806 if (curp->p_flag & P_TRACED) {
807 for (pp = curp->p_pptr; pp != NULL; pp = pp->p_pptr) {
820 /* Allow thread to clear single step for itself */
821 if (td->td_tid == tid)
826 /* not being traced... */
827 if ((p->p_flag & P_TRACED) == 0) {
832 /* not being traced by YOU */
833 if (p->p_pptr != td->td_proc) {
838 /* not currently stopped */
839 if ((p->p_flag & (P_STOPPED_SIG | P_STOPPED_TRACE)) == 0 ||
840 p->p_suspcount != p->p_numthreads ||
841 (p->p_flag & P_WAITED) == 0) {
846 if ((p->p_flag & P_STOPPED_TRACE) == 0) {
847 static int count = 0;
849 printf("P_STOPPED_TRACE not set.\n");
856 /* Keep this process around until we finish this request. */
861 * Single step fixup ala procfs
867 * Actually do the requests
870 td->td_retval[0] = 0;
874 /* set my trace flag and "owner" so it can read/write me */
875 p->p_flag |= P_TRACED;
876 p->p_oppid = p->p_pptr->p_pid;
880 /* security check done above */
881 p->p_flag |= P_TRACED;
882 p->p_oppid = p->p_pptr->p_pid;
883 if (p->p_pptr != td->td_proc)
884 proc_reparent(p, td->td_proc);
886 goto sendsig; /* in PT_CONTINUE below */
889 error = ptrace_clear_single_step(td2);
893 error = ptrace_single_step(td2);
897 td2->td_dbgflags |= TDB_SUSPEND;
899 td2->td_flags |= TDF_NEEDSUSPCHK;
904 td2->td_dbgflags &= ~TDB_SUSPEND;
913 /* Zero means do not send any signal */
914 if (data < 0 || data > _SIG_MAXSIG) {
921 error = ptrace_single_step(td2);
929 if (addr != (void *)1) {
930 error = ptrace_set_pc(td2,
931 (u_long)(uintfptr_t)addr);
937 p->p_stops |= S_PT_SCE;
940 p->p_stops |= S_PT_SCX;
943 p->p_stops |= S_PT_SCE | S_PT_SCX;
948 /* reset process parent */
949 if (p->p_oppid != p->p_pptr->p_pid) {
952 PROC_LOCK(p->p_pptr);
953 sigqueue_take(p->p_ksi);
954 PROC_UNLOCK(p->p_pptr);
957 pp = pfind(p->p_oppid);
963 proc_reparent(p, pp);
965 p->p_sigparent = SIGCHLD;
967 p->p_flag &= ~(P_TRACED | P_WAITED);
970 /* should we send SIGCHLD? */
971 /* childproc_continued(p); */
976 if (proctree_locked) {
977 sx_xunlock(&proctree_lock);
982 if ((p->p_flag & (P_STOPPED_SIG | P_STOPPED_TRACE)) != 0) {
983 /* deliver or queue signal */
984 td2->td_dbgflags &= ~TDB_XSIG;
987 if (req == PT_DETACH) {
989 FOREACH_THREAD_IN_PROC(p, td3) {
990 td3->td_dbgflags &= ~TDB_SUSPEND;
994 * unsuspend all threads, to not let a thread run,
995 * you should use PT_SUSPEND to suspend it before
996 * continuing process.
999 p->p_flag &= ~(P_STOPPED_TRACE|P_STOPPED_SIG|P_WAITED);
1000 thread_unsuspend(p);
1010 td2->td_dbgflags |= TDB_USERWR;
1017 /* write = 0 set above */
1018 iov.iov_base = write ? (caddr_t)&data : (caddr_t)&tmp;
1019 iov.iov_len = sizeof(int);
1022 uio.uio_offset = (off_t)(uintptr_t)addr;
1023 uio.uio_resid = sizeof(int);
1024 uio.uio_segflg = UIO_SYSSPACE; /* i.e.: the uap */
1025 uio.uio_rw = write ? UIO_WRITE : UIO_READ;
1027 error = proc_rwmem(p, &uio);
1028 if (uio.uio_resid != 0) {
1030 * XXX proc_rwmem() doesn't currently return ENOSPC,
1031 * so I think write() can bogusly return 0.
1032 * XXX what happens for short writes? We don't want
1033 * to write partial data.
1034 * XXX proc_rwmem() returns EPERM for other invalid
1035 * addresses. Convert this to EINVAL. Does this
1036 * clobber returns of EPERM for other reasons?
1038 if (error == 0 || error == ENOSPC || error == EPERM)
1039 error = EINVAL; /* EOF */
1042 td->td_retval[0] = tmp;
1047 #ifdef COMPAT_FREEBSD32
1050 iov.iov_base = (void *)(uintptr_t)piod32->piod_addr;
1051 iov.iov_len = piod32->piod_len;
1052 uio.uio_offset = (off_t)(uintptr_t)piod32->piod_offs;
1053 uio.uio_resid = piod32->piod_len;
1058 iov.iov_base = piod->piod_addr;
1059 iov.iov_len = piod->piod_len;
1060 uio.uio_offset = (off_t)(uintptr_t)piod->piod_offs;
1061 uio.uio_resid = piod->piod_len;
1065 uio.uio_segflg = UIO_USERSPACE;
1067 #ifdef COMPAT_FREEBSD32
1068 tmp = wrap32 ? piod32->piod_op : piod->piod_op;
1070 tmp = piod->piod_op;
1075 uio.uio_rw = UIO_READ;
1079 td2->td_dbgflags |= TDB_USERWR;
1080 uio.uio_rw = UIO_WRITE;
1087 error = proc_rwmem(p, &uio);
1088 #ifdef COMPAT_FREEBSD32
1090 piod32->piod_len -= uio.uio_resid;
1093 piod->piod_len -= uio.uio_resid;
1099 goto sendsig; /* in PT_CONTINUE above */
1102 td2->td_dbgflags |= TDB_USERWR;
1103 error = PROC_WRITE(regs, td2, addr);
1107 error = PROC_READ(regs, td2, addr);
1111 td2->td_dbgflags |= TDB_USERWR;
1112 error = PROC_WRITE(fpregs, td2, addr);
1116 error = PROC_READ(fpregs, td2, addr);
1120 td2->td_dbgflags |= TDB_USERWR;
1121 error = PROC_WRITE(dbregs, td2, addr);
1125 error = PROC_READ(dbregs, td2, addr);
1130 #ifdef COMPAT_FREEBSD32
1131 (!wrap32 && data > sizeof(*pl)) ||
1132 (wrap32 && data > sizeof(*pl32))) {
1134 data > sizeof(*pl)) {
1139 #ifdef COMPAT_FREEBSD32
1146 pl->pl_lwpid = td2->td_tid;
1148 if (td2->td_dbgflags & TDB_XSIG) {
1149 pl->pl_event = PL_EVENT_SIGNAL;
1150 if (td2->td_dbgksi.ksi_signo != 0 &&
1151 #ifdef COMPAT_FREEBSD32
1152 ((!wrap32 && data >= offsetof(struct ptrace_lwpinfo,
1153 pl_siginfo) + sizeof(pl->pl_siginfo)) ||
1154 (wrap32 && data >= offsetof(struct ptrace_lwpinfo32,
1155 pl_siginfo) + sizeof(struct siginfo32)))
1157 data >= offsetof(struct ptrace_lwpinfo, pl_siginfo)
1158 + sizeof(pl->pl_siginfo)
1161 pl->pl_flags |= PL_FLAG_SI;
1162 pl->pl_siginfo = td2->td_dbgksi.ksi_info;
1165 if ((pl->pl_flags & PL_FLAG_SI) == 0)
1166 bzero(&pl->pl_siginfo, sizeof(pl->pl_siginfo));
1167 if (td2->td_dbgflags & TDB_SCE)
1168 pl->pl_flags |= PL_FLAG_SCE;
1169 else if (td2->td_dbgflags & TDB_SCX)
1170 pl->pl_flags |= PL_FLAG_SCX;
1171 if (td2->td_dbgflags & TDB_EXEC)
1172 pl->pl_flags |= PL_FLAG_EXEC;
1173 pl->pl_sigmask = td2->td_sigmask;
1174 pl->pl_siglist = td2->td_siglist;
1175 #ifdef COMPAT_FREEBSD32
1177 ptrace_lwpinfo_to32(pl, pl32);
1182 td->td_retval[0] = p->p_numthreads;
1190 num = imin(p->p_numthreads, data);
1192 buf = malloc(num * sizeof(lwpid_t), M_TEMP, M_WAITOK);
1195 FOREACH_THREAD_IN_PROC(p, td2) {
1198 buf[tmp++] = td2->td_tid;
1201 error = copyout(buf, addr, tmp * sizeof(lwpid_t));
1204 td->td_retval[0] = tmp;
1208 case PT_VM_TIMESTAMP:
1209 td->td_retval[0] = p->p_vmspace->vm_map.timestamp;
1214 #ifdef COMPAT_FREEBSD32
1216 error = ptrace_vm_entry32(td, p, addr);
1219 error = ptrace_vm_entry(td, p, addr);
1224 #ifdef __HAVE_PTRACE_MACHDEP
1225 if (req >= PT_FIRSTMACH) {
1227 error = cpu_ptrace(td2, req, addr, data);
1231 /* Unknown request. */
1237 /* Drop our hold on this process now that the request has completed. */
1241 if (proctree_locked)
1242 sx_xunlock(&proctree_lock);
1249 * Stop a process because of a debugging event;
1250 * stay stopped until p->p_step is cleared
1251 * (cleared by PIOCCONT in procfs).
1254 stopevent(struct proc *p, unsigned int event, unsigned int val)
1257 PROC_LOCK_ASSERT(p, MA_OWNED);
1261 p->p_xthread = NULL;
1262 p->p_stype = event; /* Which event caused the stop? */
1263 wakeup(&p->p_stype); /* Wake up any PIOCWAIT'ing procs */
1264 msleep(&p->p_step, &p->p_mtx, PWAIT, "stopevent", 0);
1265 } while (p->p_step);