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>
46 #include <sys/vnode.h>
47 #include <sys/ptrace.h>
48 #include <sys/rwlock.h>
50 #include <sys/malloc.h>
51 #include <sys/signalvar.h>
53 #include <machine/reg.h>
55 #include <security/audit/audit.h>
59 #include <vm/vm_extern.h>
60 #include <vm/vm_map.h>
61 #include <vm/vm_kern.h>
62 #include <vm/vm_object.h>
63 #include <vm/vm_page.h>
64 #include <vm/vm_param.h>
66 #ifdef COMPAT_FREEBSD32
67 #include <sys/procfs.h>
68 #include <compat/freebsd32/freebsd32_signal.h>
70 struct ptrace_io_desc32 {
77 struct ptrace_vm_entry32 {
90 struct ptrace_lwpinfo32 {
91 lwpid_t pl_lwpid; /* LWP described. */
92 int pl_event; /* Event that stopped the LWP. */
93 int pl_flags; /* LWP flags. */
94 sigset_t pl_sigmask; /* LWP signal mask */
95 sigset_t pl_siglist; /* LWP pending signal */
96 struct siginfo32 pl_siginfo; /* siginfo for signal */
97 char pl_tdname[MAXCOMLEN + 1]; /* LWP name. */
98 int pl_child_pid; /* New child pid */
104 * Functions implemented using PROC_ACTION():
106 * proc_read_regs(proc, regs)
107 * Get the current user-visible register set from the process
108 * and copy it into the regs structure (<machine/reg.h>).
109 * The process is stopped at the time read_regs is called.
111 * proc_write_regs(proc, regs)
112 * Update the current register set from the passed in regs
113 * structure. Take care to avoid clobbering special CPU
114 * registers or privileged bits in the PSL.
115 * Depending on the architecture this may have fix-up work to do,
116 * especially if the IAR or PCW are modified.
117 * The process is stopped at the time write_regs is called.
119 * proc_read_fpregs, proc_write_fpregs
120 * deal with the floating point register set, otherwise as above.
122 * proc_read_dbregs, proc_write_dbregs
123 * deal with the processor debug register set, otherwise as above.
126 * Arrange for the process to trap after executing a single instruction.
129 #define PROC_ACTION(action) do { \
132 PROC_LOCK_ASSERT(td->td_proc, MA_OWNED); \
133 if ((td->td_proc->p_flag & P_INMEM) == 0) \
141 proc_read_regs(struct thread *td, struct reg *regs)
144 PROC_ACTION(fill_regs(td, regs));
148 proc_write_regs(struct thread *td, struct reg *regs)
151 PROC_ACTION(set_regs(td, regs));
155 proc_read_dbregs(struct thread *td, struct dbreg *dbregs)
158 PROC_ACTION(fill_dbregs(td, dbregs));
162 proc_write_dbregs(struct thread *td, struct dbreg *dbregs)
165 PROC_ACTION(set_dbregs(td, dbregs));
169 * Ptrace doesn't support fpregs at all, and there are no security holes
170 * or translations for fpregs, so we can just copy them.
173 proc_read_fpregs(struct thread *td, struct fpreg *fpregs)
176 PROC_ACTION(fill_fpregs(td, fpregs));
180 proc_write_fpregs(struct thread *td, struct fpreg *fpregs)
183 PROC_ACTION(set_fpregs(td, fpregs));
186 #ifdef COMPAT_FREEBSD32
187 /* For 32 bit binaries, we need to expose the 32 bit regs layouts. */
189 proc_read_regs32(struct thread *td, struct reg32 *regs32)
192 PROC_ACTION(fill_regs32(td, regs32));
196 proc_write_regs32(struct thread *td, struct reg32 *regs32)
199 PROC_ACTION(set_regs32(td, regs32));
203 proc_read_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
206 PROC_ACTION(fill_dbregs32(td, dbregs32));
210 proc_write_dbregs32(struct thread *td, struct dbreg32 *dbregs32)
213 PROC_ACTION(set_dbregs32(td, dbregs32));
217 proc_read_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
220 PROC_ACTION(fill_fpregs32(td, fpregs32));
224 proc_write_fpregs32(struct thread *td, struct fpreg32 *fpregs32)
227 PROC_ACTION(set_fpregs32(td, fpregs32));
232 proc_sstep(struct thread *td)
235 PROC_ACTION(ptrace_single_step(td));
239 proc_rwmem(struct proc *p, struct uio *uio)
242 vm_offset_t pageno; /* page number */
244 int error, fault_flags, page_offset, writing;
247 * Assert that someone has locked this vmspace. (Should be
248 * curthread but we can't assert that.) This keeps the process
249 * from exiting out from under us until this operation completes.
251 KASSERT(p->p_lock >= 1, ("%s: process %p (pid %d) not held", __func__,
257 map = &p->p_vmspace->vm_map;
260 * If we are writing, then we request vm_fault() to create a private
261 * copy of each page. Since these copies will not be writeable by the
262 * process, we must explicity request that they be dirtied.
264 writing = uio->uio_rw == UIO_WRITE;
265 reqprot = writing ? VM_PROT_COPY | VM_PROT_READ : VM_PROT_READ;
266 fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL;
269 * Only map in one page at a time. We don't have to, but it
270 * makes things easier. This way is trivial - right?
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 and hold the page on behalf of the process.
293 error = vm_fault_hold(map, pageno, reqprot, fault_flags, &m);
294 if (error != KERN_SUCCESS) {
295 if (error == KERN_RESOURCE_SHORTAGE)
303 * Now do the i/o move.
305 error = uiomove_fromphys(&m, page_offset, len, uio);
307 /* Make the I-cache coherent for breakpoints. */
308 if (writing && error == 0) {
309 vm_map_lock_read(map);
310 if (vm_map_check_protection(map, pageno, pageno +
311 PAGE_SIZE, VM_PROT_EXECUTE))
312 vm_sync_icache(map, uva, len);
313 vm_map_unlock_read(map);
323 } while (error == 0 && uio->uio_resid > 0);
329 ptrace_vm_entry(struct thread *td, struct proc *p, struct ptrace_vm_entry *pve)
333 vm_map_entry_t entry;
334 vm_object_t obj, tobj, lobj;
337 char *freepath, *fullpath;
344 vm = vmspace_acquire_ref(p);
346 vm_map_lock_read(map);
349 entry = map->header.next;
351 while (index < pve->pve_entry && entry != &map->header) {
355 if (index != pve->pve_entry) {
359 while (entry != &map->header &&
360 (entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0) {
364 if (entry == &map->header) {
369 /* We got an entry. */
370 pve->pve_entry = index + 1;
371 pve->pve_timestamp = map->timestamp;
372 pve->pve_start = entry->start;
373 pve->pve_end = entry->end - 1;
374 pve->pve_offset = entry->offset;
375 pve->pve_prot = entry->protection;
377 /* Backing object's path needed? */
378 if (pve->pve_pathlen == 0)
381 pathlen = pve->pve_pathlen;
382 pve->pve_pathlen = 0;
384 obj = entry->object.vm_object;
386 VM_OBJECT_RLOCK(obj);
389 vm_map_unlock_read(map);
392 pve->pve_fsid = VNOVAL;
393 pve->pve_fileid = VNOVAL;
395 if (error == 0 && obj != NULL) {
397 for (tobj = obj; tobj != NULL; tobj = tobj->backing_object) {
399 VM_OBJECT_RLOCK(tobj);
401 VM_OBJECT_RUNLOCK(lobj);
403 pve->pve_offset += tobj->backing_object_offset;
405 vp = (lobj->type == OBJT_VNODE) ? lobj->handle : NULL;
409 VM_OBJECT_RUNLOCK(lobj);
410 VM_OBJECT_RUNLOCK(obj);
415 vn_fullpath(td, vp, &fullpath, &freepath);
416 vn_lock(vp, LK_SHARED | LK_RETRY);
417 if (VOP_GETATTR(vp, &vattr, td->td_ucred) == 0) {
418 pve->pve_fileid = vattr.va_fileid;
419 pve->pve_fsid = vattr.va_fsid;
423 if (fullpath != NULL) {
424 pve->pve_pathlen = strlen(fullpath) + 1;
425 if (pve->pve_pathlen <= pathlen) {
426 error = copyout(fullpath, pve->pve_path,
429 error = ENAMETOOLONG;
431 if (freepath != NULL)
432 free(freepath, M_TEMP);
439 #ifdef COMPAT_FREEBSD32
441 ptrace_vm_entry32(struct thread *td, struct proc *p,
442 struct ptrace_vm_entry32 *pve32)
444 struct ptrace_vm_entry pve;
447 pve.pve_entry = pve32->pve_entry;
448 pve.pve_pathlen = pve32->pve_pathlen;
449 pve.pve_path = (void *)(uintptr_t)pve32->pve_path;
451 error = ptrace_vm_entry(td, p, &pve);
453 pve32->pve_entry = pve.pve_entry;
454 pve32->pve_timestamp = pve.pve_timestamp;
455 pve32->pve_start = pve.pve_start;
456 pve32->pve_end = pve.pve_end;
457 pve32->pve_offset = pve.pve_offset;
458 pve32->pve_prot = pve.pve_prot;
459 pve32->pve_fileid = pve.pve_fileid;
460 pve32->pve_fsid = pve.pve_fsid;
463 pve32->pve_pathlen = pve.pve_pathlen;
468 ptrace_lwpinfo_to32(const struct ptrace_lwpinfo *pl,
469 struct ptrace_lwpinfo32 *pl32)
472 pl32->pl_lwpid = pl->pl_lwpid;
473 pl32->pl_event = pl->pl_event;
474 pl32->pl_flags = pl->pl_flags;
475 pl32->pl_sigmask = pl->pl_sigmask;
476 pl32->pl_siglist = pl->pl_siglist;
477 siginfo_to_siginfo32(&pl->pl_siginfo, &pl32->pl_siginfo);
478 strcpy(pl32->pl_tdname, pl->pl_tdname);
479 pl32->pl_child_pid = pl->pl_child_pid;
481 #endif /* COMPAT_FREEBSD32 */
484 * Process debugging system call.
486 #ifndef _SYS_SYSPROTO_H_
495 #ifdef COMPAT_FREEBSD32
497 * This CPP subterfuge is to try and reduce the number of ifdefs in
498 * the body of the code.
499 * COPYIN(uap->addr, &r.reg, sizeof r.reg);
501 * copyin(uap->addr, &r.reg, sizeof r.reg);
503 * copyin(uap->addr, &r.reg32, sizeof r.reg32);
504 * .. except this is done at runtime.
506 #define COPYIN(u, k, s) wrap32 ? \
507 copyin(u, k ## 32, s ## 32) : \
509 #define COPYOUT(k, u, s) wrap32 ? \
510 copyout(k ## 32, u, s ## 32) : \
513 #define COPYIN(u, k, s) copyin(u, k, s)
514 #define COPYOUT(k, u, s) copyout(k, u, s)
517 sys_ptrace(struct thread *td, struct ptrace_args *uap)
520 * XXX this obfuscation is to reduce stack usage, but the register
521 * structs may be too large to put on the stack anyway.
524 struct ptrace_io_desc piod;
525 struct ptrace_lwpinfo pl;
526 struct ptrace_vm_entry pve;
530 #ifdef COMPAT_FREEBSD32
531 struct dbreg32 dbreg32;
532 struct fpreg32 fpreg32;
534 struct ptrace_io_desc32 piod32;
535 struct ptrace_lwpinfo32 pl32;
536 struct ptrace_vm_entry32 pve32;
541 #ifdef COMPAT_FREEBSD32
544 if (SV_CURPROC_FLAG(SV_ILP32))
547 AUDIT_ARG_PID(uap->pid);
548 AUDIT_ARG_CMD(uap->req);
549 AUDIT_ARG_VALUE(uap->data);
558 error = COPYIN(uap->addr, &r.reg, sizeof r.reg);
561 error = COPYIN(uap->addr, &r.fpreg, sizeof r.fpreg);
564 error = COPYIN(uap->addr, &r.dbreg, sizeof r.dbreg);
567 error = COPYIN(uap->addr, &r.piod, sizeof r.piod);
570 error = COPYIN(uap->addr, &r.pve, sizeof r.pve);
579 error = kern_ptrace(td, uap->req, uap->pid, addr, uap->data);
585 error = COPYOUT(&r.pve, uap->addr, sizeof r.pve);
588 error = COPYOUT(&r.piod, uap->addr, sizeof r.piod);
591 error = COPYOUT(&r.reg, uap->addr, sizeof r.reg);
594 error = COPYOUT(&r.fpreg, uap->addr, sizeof r.fpreg);
597 error = COPYOUT(&r.dbreg, uap->addr, sizeof r.dbreg);
600 error = copyout(&r.pl, uap->addr, uap->data);
609 #ifdef COMPAT_FREEBSD32
611 * PROC_READ(regs, td2, addr);
613 * proc_read_regs(td2, addr);
615 * proc_read_regs32(td2, addr);
616 * .. except this is done at runtime. There is an additional
617 * complication in that PROC_WRITE disallows 32 bit consumers
618 * from writing to 64 bit address space targets.
620 #define PROC_READ(w, t, a) wrap32 ? \
621 proc_read_ ## w ## 32(t, a) : \
622 proc_read_ ## w (t, a)
623 #define PROC_WRITE(w, t, a) wrap32 ? \
624 (safe ? proc_write_ ## w ## 32(t, a) : EINVAL ) : \
625 proc_write_ ## w (t, a)
627 #define PROC_READ(w, t, a) proc_read_ ## w (t, a)
628 #define PROC_WRITE(w, t, a) proc_write_ ## w (t, a)
632 kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
636 struct proc *curp, *p, *pp;
637 struct thread *td2 = NULL, *td3;
638 struct ptrace_io_desc *piod = NULL;
639 struct ptrace_lwpinfo *pl;
640 int error, write, tmp, num;
641 int proctree_locked = 0;
642 lwpid_t tid = 0, *buf;
643 #ifdef COMPAT_FREEBSD32
644 int wrap32 = 0, safe = 0;
645 struct ptrace_io_desc32 *piod32 = NULL;
646 struct ptrace_lwpinfo32 *pl32 = NULL;
647 struct ptrace_lwpinfo plr;
652 /* Lock proctree before locking the process. */
663 sx_xlock(&proctree_lock);
671 if (req == PT_TRACE_ME) {
675 if (pid <= PID_MAX) {
676 if ((p = pfind(pid)) == NULL) {
678 sx_xunlock(&proctree_lock);
682 td2 = tdfind(pid, -1);
685 sx_xunlock(&proctree_lock);
693 AUDIT_ARG_PROCESS(p);
695 if ((p->p_flag & P_WEXIT) != 0) {
699 if ((error = p_cansee(td, p)) != 0)
702 if ((error = p_candebug(td, p)) != 0)
706 * System processes can't be debugged.
708 if ((p->p_flag & P_SYSTEM) != 0) {
714 if ((p->p_flag & P_STOPPED_TRACE) != 0) {
715 KASSERT(p->p_xthread != NULL, ("NULL p_xthread"));
718 td2 = FIRST_THREAD_IN_PROC(p);
723 #ifdef COMPAT_FREEBSD32
725 * Test if we're a 32 bit client and what the target is.
726 * Set the wrap controls accordingly.
728 if (SV_CURPROC_FLAG(SV_ILP32)) {
729 if (SV_PROC_FLAG(td2->td_proc, SV_ILP32))
744 if (p->p_pid == td->td_proc->p_pid) {
750 if (p->p_flag & P_TRACED) {
755 /* Can't trace an ancestor if you're being traced. */
756 if (curp->p_flag & P_TRACED) {
757 for (pp = curp->p_pptr; pp != NULL; pp = pp->p_pptr) {
770 /* Allow thread to clear single step for itself */
771 if (td->td_tid == tid)
776 /* not being traced... */
777 if ((p->p_flag & P_TRACED) == 0) {
782 /* not being traced by YOU */
783 if (p->p_pptr != td->td_proc) {
788 /* not currently stopped */
789 if ((p->p_flag & (P_STOPPED_SIG | P_STOPPED_TRACE)) == 0 ||
790 p->p_suspcount != p->p_numthreads ||
791 (p->p_flag & P_WAITED) == 0) {
796 if ((p->p_flag & P_STOPPED_TRACE) == 0) {
797 static int count = 0;
799 printf("P_STOPPED_TRACE not set.\n");
806 /* Keep this process around until we finish this request. */
811 * Single step fixup ala procfs
817 * Actually do the requests
820 td->td_retval[0] = 0;
824 /* set my trace flag and "owner" so it can read/write me */
825 p->p_flag |= P_TRACED;
826 if (p->p_flag & P_PPWAIT)
827 p->p_flag |= P_PPTRACE;
828 p->p_oppid = p->p_pptr->p_pid;
832 /* security check done above */
834 * It would be nice if the tracing relationship was separate
835 * from the parent relationship but that would require
836 * another set of links in the proc struct or for "wait"
837 * to scan the entire proc table. To make life easier,
838 * we just re-parent the process we're trying to trace.
839 * The old parent is remembered so we can put things back
842 p->p_flag |= P_TRACED;
843 p->p_oppid = p->p_pptr->p_pid;
844 if (p->p_pptr != td->td_proc) {
845 proc_reparent(p, td->td_proc);
848 goto sendsig; /* in PT_CONTINUE below */
851 error = ptrace_clear_single_step(td2);
855 error = ptrace_single_step(td2);
859 td2->td_dbgflags |= TDB_SUSPEND;
861 td2->td_flags |= TDF_NEEDSUSPCHK;
866 td2->td_dbgflags &= ~TDB_SUSPEND;
871 p->p_flag |= P_FOLLOWFORK;
873 p->p_flag &= ~P_FOLLOWFORK;
882 /* Zero means do not send any signal */
883 if (data < 0 || data > _SIG_MAXSIG) {
890 error = ptrace_single_step(td2);
898 if (addr != (void *)1) {
899 error = ptrace_set_pc(td2,
900 (u_long)(uintfptr_t)addr);
906 p->p_stops |= S_PT_SCE;
909 p->p_stops |= S_PT_SCX;
912 p->p_stops |= S_PT_SCE | S_PT_SCX;
917 /* reset process parent */
918 if (p->p_oppid != p->p_pptr->p_pid) {
919 PROC_LOCK(p->p_pptr);
920 sigqueue_take(p->p_ksi);
921 PROC_UNLOCK(p->p_pptr);
923 pp = proc_realparent(p);
924 proc_reparent(p, pp);
926 p->p_sigparent = SIGCHLD;
929 p->p_flag &= ~(P_TRACED | P_WAITED | P_FOLLOWFORK);
931 /* should we send SIGCHLD? */
932 /* childproc_continued(p); */
937 if (proctree_locked) {
938 sx_xunlock(&proctree_lock);
943 if ((p->p_flag & (P_STOPPED_SIG | P_STOPPED_TRACE)) != 0) {
944 /* deliver or queue signal */
945 td2->td_dbgflags &= ~TDB_XSIG;
948 if (req == PT_DETACH) {
949 FOREACH_THREAD_IN_PROC(p, td3)
950 td3->td_dbgflags &= ~TDB_SUSPEND;
953 * unsuspend all threads, to not let a thread run,
954 * you should use PT_SUSPEND to suspend it before
955 * continuing process.
958 p->p_flag &= ~(P_STOPPED_TRACE|P_STOPPED_SIG|P_WAITED);
961 if (req == PT_ATTACH)
962 kern_psignal(p, data);
965 kern_psignal(p, data);
971 td2->td_dbgflags |= TDB_USERWR;
978 /* write = 0 set above */
979 iov.iov_base = write ? (caddr_t)&data : (caddr_t)&tmp;
980 iov.iov_len = sizeof(int);
983 uio.uio_offset = (off_t)(uintptr_t)addr;
984 uio.uio_resid = sizeof(int);
985 uio.uio_segflg = UIO_SYSSPACE; /* i.e.: the uap */
986 uio.uio_rw = write ? UIO_WRITE : UIO_READ;
988 error = proc_rwmem(p, &uio);
989 if (uio.uio_resid != 0) {
991 * XXX proc_rwmem() doesn't currently return ENOSPC,
992 * so I think write() can bogusly return 0.
993 * XXX what happens for short writes? We don't want
994 * to write partial data.
995 * XXX proc_rwmem() returns EPERM for other invalid
996 * addresses. Convert this to EINVAL. Does this
997 * clobber returns of EPERM for other reasons?
999 if (error == 0 || error == ENOSPC || error == EPERM)
1000 error = EINVAL; /* EOF */
1003 td->td_retval[0] = tmp;
1008 #ifdef COMPAT_FREEBSD32
1011 iov.iov_base = (void *)(uintptr_t)piod32->piod_addr;
1012 iov.iov_len = piod32->piod_len;
1013 uio.uio_offset = (off_t)(uintptr_t)piod32->piod_offs;
1014 uio.uio_resid = piod32->piod_len;
1019 iov.iov_base = piod->piod_addr;
1020 iov.iov_len = piod->piod_len;
1021 uio.uio_offset = (off_t)(uintptr_t)piod->piod_offs;
1022 uio.uio_resid = piod->piod_len;
1026 uio.uio_segflg = UIO_USERSPACE;
1028 #ifdef COMPAT_FREEBSD32
1029 tmp = wrap32 ? piod32->piod_op : piod->piod_op;
1031 tmp = piod->piod_op;
1036 uio.uio_rw = UIO_READ;
1040 td2->td_dbgflags |= TDB_USERWR;
1041 uio.uio_rw = UIO_WRITE;
1048 error = proc_rwmem(p, &uio);
1049 #ifdef COMPAT_FREEBSD32
1051 piod32->piod_len -= uio.uio_resid;
1054 piod->piod_len -= uio.uio_resid;
1060 goto sendsig; /* in PT_CONTINUE above */
1063 td2->td_dbgflags |= TDB_USERWR;
1064 error = PROC_WRITE(regs, td2, addr);
1068 error = PROC_READ(regs, td2, addr);
1072 td2->td_dbgflags |= TDB_USERWR;
1073 error = PROC_WRITE(fpregs, td2, addr);
1077 error = PROC_READ(fpregs, td2, addr);
1081 td2->td_dbgflags |= TDB_USERWR;
1082 error = PROC_WRITE(dbregs, td2, addr);
1086 error = PROC_READ(dbregs, td2, addr);
1091 #ifdef COMPAT_FREEBSD32
1092 (!wrap32 && data > sizeof(*pl)) ||
1093 (wrap32 && data > sizeof(*pl32))) {
1095 data > sizeof(*pl)) {
1100 #ifdef COMPAT_FREEBSD32
1107 pl->pl_lwpid = td2->td_tid;
1108 pl->pl_event = PL_EVENT_NONE;
1110 if (td2->td_dbgflags & TDB_XSIG) {
1111 pl->pl_event = PL_EVENT_SIGNAL;
1112 if (td2->td_dbgksi.ksi_signo != 0 &&
1113 #ifdef COMPAT_FREEBSD32
1114 ((!wrap32 && data >= offsetof(struct ptrace_lwpinfo,
1115 pl_siginfo) + sizeof(pl->pl_siginfo)) ||
1116 (wrap32 && data >= offsetof(struct ptrace_lwpinfo32,
1117 pl_siginfo) + sizeof(struct siginfo32)))
1119 data >= offsetof(struct ptrace_lwpinfo, pl_siginfo)
1120 + sizeof(pl->pl_siginfo)
1123 pl->pl_flags |= PL_FLAG_SI;
1124 pl->pl_siginfo = td2->td_dbgksi.ksi_info;
1127 if ((pl->pl_flags & PL_FLAG_SI) == 0)
1128 bzero(&pl->pl_siginfo, sizeof(pl->pl_siginfo));
1129 if (td2->td_dbgflags & TDB_SCE)
1130 pl->pl_flags |= PL_FLAG_SCE;
1131 else if (td2->td_dbgflags & TDB_SCX)
1132 pl->pl_flags |= PL_FLAG_SCX;
1133 if (td2->td_dbgflags & TDB_EXEC)
1134 pl->pl_flags |= PL_FLAG_EXEC;
1135 if (td2->td_dbgflags & TDB_FORK) {
1136 pl->pl_flags |= PL_FLAG_FORKED;
1137 pl->pl_child_pid = td2->td_dbg_forked;
1139 if (td2->td_dbgflags & TDB_CHILD)
1140 pl->pl_flags |= PL_FLAG_CHILD;
1141 pl->pl_sigmask = td2->td_sigmask;
1142 pl->pl_siglist = td2->td_siglist;
1143 strcpy(pl->pl_tdname, td2->td_name);
1144 #ifdef COMPAT_FREEBSD32
1146 ptrace_lwpinfo_to32(pl, pl32);
1151 td->td_retval[0] = p->p_numthreads;
1159 num = imin(p->p_numthreads, data);
1161 buf = malloc(num * sizeof(lwpid_t), M_TEMP, M_WAITOK);
1164 FOREACH_THREAD_IN_PROC(p, td2) {
1167 buf[tmp++] = td2->td_tid;
1170 error = copyout(buf, addr, tmp * sizeof(lwpid_t));
1173 td->td_retval[0] = tmp;
1177 case PT_VM_TIMESTAMP:
1178 td->td_retval[0] = p->p_vmspace->vm_map.timestamp;
1183 #ifdef COMPAT_FREEBSD32
1185 error = ptrace_vm_entry32(td, p, addr);
1188 error = ptrace_vm_entry(td, p, addr);
1193 #ifdef __HAVE_PTRACE_MACHDEP
1194 if (req >= PT_FIRSTMACH) {
1196 error = cpu_ptrace(td2, req, addr, data);
1200 /* Unknown request. */
1206 /* Drop our hold on this process now that the request has completed. */
1210 if (proctree_locked)
1211 sx_xunlock(&proctree_lock);
1218 * Stop a process because of a debugging event;
1219 * stay stopped until p->p_step is cleared
1220 * (cleared by PIOCCONT in procfs).
1223 stopevent(struct proc *p, unsigned int event, unsigned int val)
1226 PROC_LOCK_ASSERT(p, MA_OWNED);
1230 p->p_xthread = NULL;
1231 p->p_stype = event; /* Which event caused the stop? */
1232 wakeup(&p->p_stype); /* Wake up any PIOCWAIT'ing procs */
1233 msleep(&p->p_step, &p->p_mtx, PWAIT, "stopevent", 0);
1234 } while (p->p_step);