| File: | kern/sys_process.c |
| Warning: | line 663, column 11 Copies out a struct with uncleared padding (>= 4 bytes) |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | /*- | |||
| 2 | * SPDX-License-Identifier: BSD-4-Clause | |||
| 3 | * | |||
| 4 | * Copyright (c) 1994, Sean Eric Fagan | |||
| 5 | * All rights reserved. | |||
| 6 | * | |||
| 7 | * Redistribution and use in source and binary forms, with or without | |||
| 8 | * modification, are permitted provided that the following conditions | |||
| 9 | * are met: | |||
| 10 | * 1. Redistributions of source code must retain the above copyright | |||
| 11 | * notice, this list of conditions and the following disclaimer. | |||
| 12 | * 2. Redistributions in binary form must reproduce the above copyright | |||
| 13 | * notice, this list of conditions and the following disclaimer in the | |||
| 14 | * documentation and/or other materials provided with the distribution. | |||
| 15 | * 3. All advertising materials mentioning features or use of this software | |||
| 16 | * must display the following acknowledgement: | |||
| 17 | * This product includes software developed by Sean Eric Fagan. | |||
| 18 | * 4. The name of the author may not be used to endorse or promote products | |||
| 19 | * derived from this software without specific prior written permission. | |||
| 20 | * | |||
| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |||
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |||
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
| 31 | * SUCH DAMAGE. | |||
| 32 | */ | |||
| 33 | ||||
| 34 | #include <sys/cdefs.h> | |||
| 35 | __FBSDID("$FreeBSD$")__asm__(".ident\t\"" "$FreeBSD$" "\""); | |||
| 36 | ||||
| 37 | #include <sys/param.h> | |||
| 38 | #include <sys/systm.h> | |||
| 39 | #include <sys/lock.h> | |||
| 40 | #include <sys/mutex.h> | |||
| 41 | #include <sys/syscallsubr.h> | |||
| 42 | #include <sys/sysent.h> | |||
| 43 | #include <sys/sysproto.h> | |||
| 44 | #include <sys/pioctl.h> | |||
| 45 | #include <sys/priv.h> | |||
| 46 | #include <sys/proc.h> | |||
| 47 | #include <sys/vnode.h> | |||
| 48 | #include <sys/ptrace.h> | |||
| 49 | #include <sys/rwlock.h> | |||
| 50 | #include <sys/sx.h> | |||
| 51 | #include <sys/malloc.h> | |||
| 52 | #include <sys/signalvar.h> | |||
| 53 | ||||
| 54 | #include <machine/reg.h> | |||
| 55 | ||||
| 56 | #include <security/audit/audit.h> | |||
| 57 | ||||
| 58 | #include <vm/vm.h> | |||
| 59 | #include <vm/pmap.h> | |||
| 60 | #include <vm/vm_extern.h> | |||
| 61 | #include <vm/vm_map.h> | |||
| 62 | #include <vm/vm_kern.h> | |||
| 63 | #include <vm/vm_object.h> | |||
| 64 | #include <vm/vm_page.h> | |||
| 65 | #include <vm/vm_param.h> | |||
| 66 | ||||
| 67 | #ifdef COMPAT_FREEBSD321 | |||
| 68 | #include <sys/procfs.h> | |||
| 69 | #include <compat/freebsd32/freebsd32_signal.h> | |||
| 70 | ||||
| 71 | struct ptrace_io_desc32 { | |||
| 72 | int piod_op; | |||
| 73 | uint32_t piod_offs; | |||
| 74 | uint32_t piod_addr; | |||
| 75 | uint32_t piod_len; | |||
| 76 | }; | |||
| 77 | ||||
| 78 | struct ptrace_vm_entry32 { | |||
| 79 | int pve_entry; | |||
| 80 | int pve_timestamp; | |||
| 81 | uint32_t pve_start; | |||
| 82 | uint32_t pve_end; | |||
| 83 | uint32_t pve_offset; | |||
| 84 | u_int pve_prot; | |||
| 85 | u_int pve_pathlen; | |||
| 86 | int32_t pve_fileid; | |||
| 87 | u_int pve_fsid; | |||
| 88 | uint32_t pve_path; | |||
| 89 | }; | |||
| 90 | #endif | |||
| 91 | ||||
| 92 | /* | |||
| 93 | * Functions implemented using PROC_ACTION(): | |||
| 94 | * | |||
| 95 | * proc_read_regs(proc, regs) | |||
| 96 | * Get the current user-visible register set from the process | |||
| 97 | * and copy it into the regs structure (<machine/reg.h>). | |||
| 98 | * The process is stopped at the time read_regs is called. | |||
| 99 | * | |||
| 100 | * proc_write_regs(proc, regs) | |||
| 101 | * Update the current register set from the passed in regs | |||
| 102 | * structure. Take care to avoid clobbering special CPU | |||
| 103 | * registers or privileged bits in the PSL. | |||
| 104 | * Depending on the architecture this may have fix-up work to do, | |||
| 105 | * especially if the IAR or PCW are modified. | |||
| 106 | * The process is stopped at the time write_regs is called. | |||
| 107 | * | |||
| 108 | * proc_read_fpregs, proc_write_fpregs | |||
| 109 | * deal with the floating point register set, otherwise as above. | |||
| 110 | * | |||
| 111 | * proc_read_dbregs, proc_write_dbregs | |||
| 112 | * deal with the processor debug register set, otherwise as above. | |||
| 113 | * | |||
| 114 | * proc_sstep(proc) | |||
| 115 | * Arrange for the process to trap after executing a single instruction. | |||
| 116 | */ | |||
| 117 | ||||
| 118 | #define PROC_ACTION(action)do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (118)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (action); return (error); } while (0) do { \ | |||
| 119 | int error; \ | |||
| 120 | \ | |||
| 121 | PROC_LOCK_ASSERT(td->td_proc, MA_OWNED)__mtx_assert(&(((&(td->td_proc)->p_mtx)))->mtx_lock , (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c"), (121)); \ | |||
| 122 | if ((td->td_proc->p_flag & P_INMEM0x10000000) == 0) \ | |||
| 123 | error = EIO5; \ | |||
| 124 | else \ | |||
| 125 | error = (action); \ | |||
| 126 | return (error); \ | |||
| 127 | } while(0) | |||
| 128 | ||||
| 129 | int | |||
| 130 | proc_read_regs(struct thread *td, struct reg *regs) | |||
| 131 | { | |||
| 132 | ||||
| 133 | PROC_ACTION(fill_regs(td, regs))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (133)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (fill_regs(td, regs)); return (error ); } while(0); | |||
| 134 | } | |||
| 135 | ||||
| 136 | int | |||
| 137 | proc_write_regs(struct thread *td, struct reg *regs) | |||
| 138 | { | |||
| 139 | ||||
| 140 | PROC_ACTION(set_regs(td, regs))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (140)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (set_regs(td, regs)); return (error ); } while(0); | |||
| 141 | } | |||
| 142 | ||||
| 143 | int | |||
| 144 | proc_read_dbregs(struct thread *td, struct dbreg *dbregs) | |||
| 145 | { | |||
| 146 | ||||
| 147 | PROC_ACTION(fill_dbregs(td, dbregs))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (147)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (fill_dbregs(td, dbregs)); return (error); } while(0); | |||
| 148 | } | |||
| 149 | ||||
| 150 | int | |||
| 151 | proc_write_dbregs(struct thread *td, struct dbreg *dbregs) | |||
| 152 | { | |||
| 153 | ||||
| 154 | PROC_ACTION(set_dbregs(td, dbregs))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (154)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (set_dbregs(td, dbregs)); return ( error); } while(0); | |||
| 155 | } | |||
| 156 | ||||
| 157 | /* | |||
| 158 | * Ptrace doesn't support fpregs at all, and there are no security holes | |||
| 159 | * or translations for fpregs, so we can just copy them. | |||
| 160 | */ | |||
| 161 | int | |||
| 162 | proc_read_fpregs(struct thread *td, struct fpreg *fpregs) | |||
| 163 | { | |||
| 164 | ||||
| 165 | PROC_ACTION(fill_fpregs(td, fpregs))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (165)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (fill_fpregs(td, fpregs)); return (error); } while(0); | |||
| 166 | } | |||
| 167 | ||||
| 168 | int | |||
| 169 | proc_write_fpregs(struct thread *td, struct fpreg *fpregs) | |||
| 170 | { | |||
| 171 | ||||
| 172 | PROC_ACTION(set_fpregs(td, fpregs))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (172)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (set_fpregs(td, fpregs)); return ( error); } while(0); | |||
| 173 | } | |||
| 174 | ||||
| 175 | #ifdef COMPAT_FREEBSD321 | |||
| 176 | /* For 32 bit binaries, we need to expose the 32 bit regs layouts. */ | |||
| 177 | int | |||
| 178 | proc_read_regs32(struct thread *td, struct reg32 *regs32) | |||
| 179 | { | |||
| 180 | ||||
| 181 | PROC_ACTION(fill_regs32(td, regs32))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (181)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (fill_regs32(td, regs32)); return (error); } while(0); | |||
| 182 | } | |||
| 183 | ||||
| 184 | int | |||
| 185 | proc_write_regs32(struct thread *td, struct reg32 *regs32) | |||
| 186 | { | |||
| 187 | ||||
| 188 | PROC_ACTION(set_regs32(td, regs32))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (188)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (set_regs32(td, regs32)); return ( error); } while(0); | |||
| 189 | } | |||
| 190 | ||||
| 191 | int | |||
| 192 | proc_read_dbregs32(struct thread *td, struct dbreg32 *dbregs32) | |||
| 193 | { | |||
| 194 | ||||
| 195 | PROC_ACTION(fill_dbregs32(td, dbregs32))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (195)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (fill_dbregs32(td, dbregs32)); return (error); } while(0); | |||
| 196 | } | |||
| 197 | ||||
| 198 | int | |||
| 199 | proc_write_dbregs32(struct thread *td, struct dbreg32 *dbregs32) | |||
| 200 | { | |||
| 201 | ||||
| 202 | PROC_ACTION(set_dbregs32(td, dbregs32))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (202)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (set_dbregs32(td, dbregs32)); return (error); } while(0); | |||
| 203 | } | |||
| 204 | ||||
| 205 | int | |||
| 206 | proc_read_fpregs32(struct thread *td, struct fpreg32 *fpregs32) | |||
| 207 | { | |||
| 208 | ||||
| 209 | PROC_ACTION(fill_fpregs32(td, fpregs32))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (209)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (fill_fpregs32(td, fpregs32)); return (error); } while(0); | |||
| 210 | } | |||
| 211 | ||||
| 212 | int | |||
| 213 | proc_write_fpregs32(struct thread *td, struct fpreg32 *fpregs32) | |||
| 214 | { | |||
| 215 | ||||
| 216 | PROC_ACTION(set_fpregs32(td, fpregs32))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (216)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (set_fpregs32(td, fpregs32)); return (error); } while(0); | |||
| 217 | } | |||
| 218 | #endif | |||
| 219 | ||||
| 220 | int | |||
| 221 | proc_sstep(struct thread *td) | |||
| 222 | { | |||
| 223 | ||||
| 224 | PROC_ACTION(ptrace_single_step(td))do { int error; __mtx_assert(&(((&(td->td_proc)-> p_mtx)))->mtx_lock, (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c" ), (224)); if ((td->td_proc->p_flag & 0x10000000) == 0) error = 5; else error = (ptrace_single_step(td)); return ( error); } while(0); | |||
| 225 | } | |||
| 226 | ||||
| 227 | int | |||
| 228 | proc_rwmem(struct proc *p, struct uio *uio) | |||
| 229 | { | |||
| 230 | vm_map_t map; | |||
| 231 | vm_offset_t pageno; /* page number */ | |||
| 232 | vm_prot_t reqprot; | |||
| 233 | int error, fault_flags, page_offset, writing; | |||
| 234 | ||||
| 235 | /* | |||
| 236 | * Assert that someone has locked this vmspace. (Should be | |||
| 237 | * curthread but we can't assert that.) This keeps the process | |||
| 238 | * from exiting out from under us until this operation completes. | |||
| 239 | */ | |||
| 240 | PROC_ASSERT_HELD(p)do { do { if (__builtin_expect((!((p)->p_lock > 0)), 0) ) panic ("process %p not held", p); } while (0); } while (0); | |||
| 241 | PROC_LOCK_ASSERT(p, MA_NOTOWNED)__mtx_assert(&(((&(p)->p_mtx)))->mtx_lock, (((0x00000000 ))), ("/root/freebsd/sys/kern/sys_process.c"), (241)); | |||
| 242 | ||||
| 243 | /* | |||
| 244 | * The map we want... | |||
| 245 | */ | |||
| 246 | map = &p->p_vmspace->vm_map; | |||
| 247 | ||||
| 248 | /* | |||
| 249 | * If we are writing, then we request vm_fault() to create a private | |||
| 250 | * copy of each page. Since these copies will not be writeable by the | |||
| 251 | * process, we must explicity request that they be dirtied. | |||
| 252 | */ | |||
| 253 | writing = uio->uio_rw == UIO_WRITE; | |||
| 254 | reqprot = writing ? VM_PROT_COPY((vm_prot_t) 0x08) | VM_PROT_READ((vm_prot_t) 0x01) : VM_PROT_READ((vm_prot_t) 0x01); | |||
| 255 | fault_flags = writing ? VM_FAULT_DIRTY2 : VM_FAULT_NORMAL0; | |||
| 256 | ||||
| 257 | /* | |||
| 258 | * Only map in one page at a time. We don't have to, but it | |||
| 259 | * makes things easier. This way is trivial - right? | |||
| 260 | */ | |||
| 261 | do { | |||
| 262 | vm_offset_t uva; | |||
| 263 | u_int len; | |||
| 264 | vm_page_t m; | |||
| 265 | ||||
| 266 | uva = (vm_offset_t)uio->uio_offset; | |||
| 267 | ||||
| 268 | /* | |||
| 269 | * Get the page number of this segment. | |||
| 270 | */ | |||
| 271 | pageno = trunc_page(uva)((unsigned long)(uva) & ~(((1<<12)-1))); | |||
| 272 | page_offset = uva - pageno; | |||
| 273 | ||||
| 274 | /* | |||
| 275 | * How many bytes to copy | |||
| 276 | */ | |||
| 277 | len = min(PAGE_SIZE(1<<12) - page_offset, uio->uio_resid); | |||
| 278 | ||||
| 279 | /* | |||
| 280 | * Fault and hold the page on behalf of the process. | |||
| 281 | */ | |||
| 282 | error = vm_fault_hold(map, pageno, reqprot, fault_flags, &m); | |||
| 283 | if (error != KERN_SUCCESS0) { | |||
| 284 | if (error == KERN_RESOURCE_SHORTAGE6) | |||
| 285 | error = ENOMEM12; | |||
| 286 | else | |||
| 287 | error = EFAULT14; | |||
| 288 | break; | |||
| 289 | } | |||
| 290 | ||||
| 291 | /* | |||
| 292 | * Now do the i/o move. | |||
| 293 | */ | |||
| 294 | error = uiomove_fromphys(&m, page_offset, len, uio); | |||
| 295 | ||||
| 296 | /* Make the I-cache coherent for breakpoints. */ | |||
| 297 | if (writing && error == 0) { | |||
| 298 | vm_map_lock_read(map)_vm_map_lock_read(map, "/root/freebsd/sys/kern/sys_process.c" , 298); | |||
| 299 | if (vm_map_check_protection(map, pageno, pageno + | |||
| 300 | PAGE_SIZE(1<<12), VM_PROT_EXECUTE((vm_prot_t) 0x04))) | |||
| 301 | vm_sync_icache(map, uva, len); | |||
| 302 | vm_map_unlock_read(map)_vm_map_unlock_read(map, "/root/freebsd/sys/kern/sys_process.c" , 302); | |||
| 303 | } | |||
| 304 | ||||
| 305 | /* | |||
| 306 | * Release the page. | |||
| 307 | */ | |||
| 308 | vm_page_lock(m)__mtx_lock_flags(&(((((((struct mtx *)(&pa_lock[((((( (m)))->phys_addr)) >> 21) % 256])))))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (308)); | |||
| 309 | vm_page_unhold(m); | |||
| 310 | vm_page_unlock(m)__mtx_unlock_flags(&(((((((struct mtx *)(&pa_lock[((( (((m)))->phys_addr)) >> 21) % 256])))))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (310)); | |||
| 311 | ||||
| 312 | } while (error == 0 && uio->uio_resid > 0); | |||
| 313 | ||||
| 314 | return (error); | |||
| 315 | } | |||
| 316 | ||||
| 317 | static ssize_t | |||
| 318 | proc_iop(struct thread *td, struct proc *p, vm_offset_t va, void *buf, | |||
| 319 | size_t len, enum uio_rw rw) | |||
| 320 | { | |||
| 321 | struct iovec iov; | |||
| 322 | struct uio uio; | |||
| 323 | ssize_t slen; | |||
| 324 | ||||
| 325 | MPASS(len < SSIZE_MAX)do { if (__builtin_expect((!((len < 0x7fffffffffffffff))), 0)) panic ("Assertion %s failed at %s:%d", "len < SSIZE_MAX" , "/root/freebsd/sys/kern/sys_process.c", 325); } while (0); | |||
| 326 | slen = (ssize_t)len; | |||
| 327 | ||||
| 328 | iov.iov_base = (caddr_t)buf; | |||
| 329 | iov.iov_len = len; | |||
| 330 | uio.uio_iov = &iov; | |||
| 331 | uio.uio_iovcnt = 1; | |||
| 332 | uio.uio_offset = va; | |||
| 333 | uio.uio_resid = slen; | |||
| 334 | uio.uio_segflg = UIO_SYSSPACE; | |||
| 335 | uio.uio_rw = rw; | |||
| 336 | uio.uio_td = td; | |||
| 337 | proc_rwmem(p, &uio); | |||
| 338 | if (uio.uio_resid == slen) | |||
| 339 | return (-1); | |||
| 340 | return (slen - uio.uio_resid); | |||
| 341 | } | |||
| 342 | ||||
| 343 | ssize_t | |||
| 344 | proc_readmem(struct thread *td, struct proc *p, vm_offset_t va, void *buf, | |||
| 345 | size_t len) | |||
| 346 | { | |||
| 347 | ||||
| 348 | return (proc_iop(td, p, va, buf, len, UIO_READ)); | |||
| 349 | } | |||
| 350 | ||||
| 351 | ssize_t | |||
| 352 | proc_writemem(struct thread *td, struct proc *p, vm_offset_t va, void *buf, | |||
| 353 | size_t len) | |||
| 354 | { | |||
| 355 | ||||
| 356 | return (proc_iop(td, p, va, buf, len, UIO_WRITE)); | |||
| 357 | } | |||
| 358 | ||||
| 359 | static int | |||
| 360 | ptrace_vm_entry(struct thread *td, struct proc *p, struct ptrace_vm_entry *pve) | |||
| 361 | { | |||
| 362 | struct vattr vattr; | |||
| 363 | vm_map_t map; | |||
| 364 | vm_map_entry_t entry; | |||
| 365 | vm_object_t obj, tobj, lobj; | |||
| 366 | struct vmspace *vm; | |||
| 367 | struct vnode *vp; | |||
| 368 | char *freepath, *fullpath; | |||
| 369 | u_int pathlen; | |||
| 370 | int error, index; | |||
| 371 | ||||
| 372 | error = 0; | |||
| 373 | obj = NULL((void *)0); | |||
| 374 | ||||
| 375 | vm = vmspace_acquire_ref(p); | |||
| 376 | map = &vm->vm_map; | |||
| 377 | vm_map_lock_read(map)_vm_map_lock_read(map, "/root/freebsd/sys/kern/sys_process.c" , 377); | |||
| 378 | ||||
| 379 | do { | |||
| 380 | entry = map->header.next; | |||
| 381 | index = 0; | |||
| 382 | while (index < pve->pve_entry && entry != &map->header) { | |||
| 383 | entry = entry->next; | |||
| 384 | index++; | |||
| 385 | } | |||
| 386 | if (index != pve->pve_entry) { | |||
| 387 | error = EINVAL22; | |||
| 388 | break; | |||
| 389 | } | |||
| 390 | KASSERT((map->header.eflags & MAP_ENTRY_IS_SUB_MAP) == 0,do { if (__builtin_expect((!((map->header.eflags & 0x0002 ) == 0)), 0)) panic ("Submap in map header"); } while (0) | |||
| 391 | ("Submap in map header"))do { if (__builtin_expect((!((map->header.eflags & 0x0002 ) == 0)), 0)) panic ("Submap in map header"); } while (0); | |||
| 392 | while ((entry->eflags & MAP_ENTRY_IS_SUB_MAP0x0002) != 0) { | |||
| 393 | entry = entry->next; | |||
| 394 | index++; | |||
| 395 | } | |||
| 396 | if (entry == &map->header) { | |||
| 397 | error = ENOENT2; | |||
| 398 | break; | |||
| 399 | } | |||
| 400 | ||||
| 401 | /* We got an entry. */ | |||
| 402 | pve->pve_entry = index + 1; | |||
| 403 | pve->pve_timestamp = map->timestamp; | |||
| 404 | pve->pve_start = entry->start; | |||
| 405 | pve->pve_end = entry->end - 1; | |||
| 406 | pve->pve_offset = entry->offset; | |||
| 407 | pve->pve_prot = entry->protection; | |||
| 408 | ||||
| 409 | /* Backing object's path needed? */ | |||
| 410 | if (pve->pve_pathlen == 0) | |||
| 411 | break; | |||
| 412 | ||||
| 413 | pathlen = pve->pve_pathlen; | |||
| 414 | pve->pve_pathlen = 0; | |||
| 415 | ||||
| 416 | obj = entry->object.vm_object; | |||
| 417 | if (obj != NULL((void *)0)) | |||
| 418 | VM_OBJECT_RLOCK(obj)__rw_rlock(&((&(obj)->lock))->rw_lock, "/root/freebsd/sys/kern/sys_process.c" , 418); | |||
| 419 | } while (0); | |||
| 420 | ||||
| 421 | vm_map_unlock_read(map)_vm_map_unlock_read(map, "/root/freebsd/sys/kern/sys_process.c" , 421); | |||
| 422 | ||||
| 423 | pve->pve_fsid = VNOVAL(-1); | |||
| 424 | pve->pve_fileid = VNOVAL(-1); | |||
| 425 | ||||
| 426 | if (error == 0 && obj != NULL((void *)0)) { | |||
| 427 | lobj = obj; | |||
| 428 | for (tobj = obj; tobj != NULL((void *)0); tobj = tobj->backing_object) { | |||
| 429 | if (tobj != obj) | |||
| 430 | VM_OBJECT_RLOCK(tobj)__rw_rlock(&((&(tobj)->lock))->rw_lock, "/root/freebsd/sys/kern/sys_process.c" , 430); | |||
| 431 | if (lobj != obj) | |||
| 432 | VM_OBJECT_RUNLOCK(lobj)_rw_runlock_cookie(&((&(lobj)->lock))->rw_lock, "/root/freebsd/sys/kern/sys_process.c", 432); | |||
| 433 | lobj = tobj; | |||
| 434 | pve->pve_offset += tobj->backing_object_offset; | |||
| 435 | } | |||
| 436 | vp = vm_object_vnode(lobj); | |||
| 437 | if (vp != NULL((void *)0)) | |||
| 438 | vref(vp); | |||
| 439 | if (lobj != obj) | |||
| 440 | VM_OBJECT_RUNLOCK(lobj)_rw_runlock_cookie(&((&(lobj)->lock))->rw_lock, "/root/freebsd/sys/kern/sys_process.c", 440); | |||
| 441 | VM_OBJECT_RUNLOCK(obj)_rw_runlock_cookie(&((&(obj)->lock))->rw_lock, "/root/freebsd/sys/kern/sys_process.c" , 441); | |||
| 442 | ||||
| 443 | if (vp != NULL((void *)0)) { | |||
| 444 | freepath = NULL((void *)0); | |||
| 445 | fullpath = NULL((void *)0); | |||
| 446 | vn_fullpath(td, vp, &fullpath, &freepath); | |||
| 447 | vn_lock(vp, LK_SHARED | LK_RETRY)_vn_lock(vp, 0x200000 | 0x000400, "/root/freebsd/sys/kern/sys_process.c" , 447); | |||
| 448 | if (VOP_GETATTR(vp, &vattr, td->td_ucred) == 0) { | |||
| 449 | pve->pve_fileid = vattr.va_fileid; | |||
| 450 | pve->pve_fsid = vattr.va_fsid; | |||
| 451 | } | |||
| 452 | vput(vp); | |||
| 453 | ||||
| 454 | if (fullpath != NULL((void *)0)) { | |||
| 455 | pve->pve_pathlen = strlen(fullpath) + 1; | |||
| 456 | if (pve->pve_pathlen <= pathlen) { | |||
| 457 | error = copyout(fullpath, pve->pve_path, | |||
| 458 | pve->pve_pathlen); | |||
| 459 | } else | |||
| 460 | error = ENAMETOOLONG63; | |||
| 461 | } | |||
| 462 | if (freepath != NULL((void *)0)) | |||
| 463 | free(freepath, M_TEMP); | |||
| 464 | } | |||
| 465 | } | |||
| 466 | vmspace_free(vm); | |||
| 467 | if (error == 0) | |||
| 468 | CTR3(KTR_PTRACE, "PT_VM_ENTRY: pid %d, entry %d, start %p",(void)0 | |||
| 469 | p->p_pid, pve->pve_entry, pve->pve_start)(void)0; | |||
| 470 | ||||
| 471 | return (error); | |||
| 472 | } | |||
| 473 | ||||
| 474 | #ifdef COMPAT_FREEBSD321 | |||
| 475 | static int | |||
| 476 | ptrace_vm_entry32(struct thread *td, struct proc *p, | |||
| 477 | struct ptrace_vm_entry32 *pve32) | |||
| 478 | { | |||
| 479 | struct ptrace_vm_entry pve; | |||
| 480 | int error; | |||
| 481 | ||||
| 482 | pve.pve_entry = pve32->pve_entry; | |||
| 483 | pve.pve_pathlen = pve32->pve_pathlen; | |||
| 484 | pve.pve_path = (void *)(uintptr_t)pve32->pve_path; | |||
| 485 | ||||
| 486 | error = ptrace_vm_entry(td, p, &pve); | |||
| 487 | if (error == 0) { | |||
| 488 | pve32->pve_entry = pve.pve_entry; | |||
| 489 | pve32->pve_timestamp = pve.pve_timestamp; | |||
| 490 | pve32->pve_start = pve.pve_start; | |||
| 491 | pve32->pve_end = pve.pve_end; | |||
| 492 | pve32->pve_offset = pve.pve_offset; | |||
| 493 | pve32->pve_prot = pve.pve_prot; | |||
| 494 | pve32->pve_fileid = pve.pve_fileid; | |||
| 495 | pve32->pve_fsid = pve.pve_fsid; | |||
| 496 | } | |||
| 497 | ||||
| 498 | pve32->pve_pathlen = pve.pve_pathlen; | |||
| 499 | return (error); | |||
| 500 | } | |||
| 501 | ||||
| 502 | static void | |||
| 503 | ptrace_lwpinfo_to32(const struct ptrace_lwpinfo *pl, | |||
| 504 | struct ptrace_lwpinfo32 *pl32) | |||
| 505 | { | |||
| 506 | ||||
| 507 | bzero(pl32, sizeof(*pl32))__builtin_memset((pl32), 0, (sizeof(*pl32))); | |||
| 508 | pl32->pl_lwpid = pl->pl_lwpid; | |||
| 509 | pl32->pl_event = pl->pl_event; | |||
| 510 | pl32->pl_flags = pl->pl_flags; | |||
| 511 | pl32->pl_sigmask = pl->pl_sigmask; | |||
| 512 | pl32->pl_siglist = pl->pl_siglist; | |||
| 513 | siginfo_to_siginfo32(&pl->pl_siginfo, &pl32->pl_siginfo); | |||
| 514 | strcpy(pl32->pl_tdname, pl->pl_tdname); | |||
| 515 | pl32->pl_child_pid = pl->pl_child_pid; | |||
| 516 | pl32->pl_syscall_code = pl->pl_syscall_code; | |||
| 517 | pl32->pl_syscall_narg = pl->pl_syscall_narg; | |||
| 518 | } | |||
| 519 | #endif /* COMPAT_FREEBSD32 */ | |||
| 520 | ||||
| 521 | /* | |||
| 522 | * Process debugging system call. | |||
| 523 | */ | |||
| 524 | #ifndef _SYS_SYSPROTO_H_ | |||
| 525 | struct ptrace_args { | |||
| 526 | int req; | |||
| 527 | pid_t pid; | |||
| 528 | caddr_t addr; | |||
| 529 | int data; | |||
| 530 | }; | |||
| 531 | #endif | |||
| 532 | ||||
| 533 | #ifdef COMPAT_FREEBSD321 | |||
| 534 | /* | |||
| 535 | * This CPP subterfuge is to try and reduce the number of ifdefs in | |||
| 536 | * the body of the code. | |||
| 537 | * COPYIN(uap->addr, &r.reg, sizeof r.reg); | |||
| 538 | * becomes either: | |||
| 539 | * copyin(uap->addr, &r.reg, sizeof r.reg); | |||
| 540 | * or | |||
| 541 | * copyin(uap->addr, &r.reg32, sizeof r.reg32); | |||
| 542 | * .. except this is done at runtime. | |||
| 543 | */ | |||
| 544 | #define BZERO(a, s) wrap32 ? \ | |||
| 545 | bzero(a ## 32, s ## 32)__builtin_memset((a ## 32), 0, (s ## 32)) : \ | |||
| 546 | bzero(a, s)__builtin_memset((a), 0, (s)) | |||
| 547 | #define COPYIN(u, k, s) wrap32 ? \ | |||
| 548 | copyin(u, k ## 32, s ## 32) : \ | |||
| 549 | copyin(u, k, s) | |||
| 550 | #define COPYOUT(k, u, s) wrap32 ? \ | |||
| 551 | copyout(k ## 32, u, s ## 32) : \ | |||
| 552 | copyout(k, u, s) | |||
| 553 | #else | |||
| 554 | #define BZERO(a, s) bzero(a, s)__builtin_memset((a), 0, (s)) | |||
| 555 | #define COPYIN(u, k, s) copyin(u, k, s) | |||
| 556 | #define COPYOUT(k, u, s) copyout(k, u, s) | |||
| 557 | #endif | |||
| 558 | int | |||
| 559 | sys_ptrace(struct thread *td, struct ptrace_args *uap) | |||
| 560 | { | |||
| 561 | /* | |||
| 562 | * XXX this obfuscation is to reduce stack usage, but the register | |||
| 563 | * structs may be too large to put on the stack anyway. | |||
| 564 | */ | |||
| 565 | union { | |||
| 566 | struct ptrace_io_desc piod; | |||
| 567 | struct ptrace_lwpinfo pl; | |||
| 568 | struct ptrace_vm_entry pve; | |||
| 569 | struct dbreg dbreg; | |||
| 570 | struct fpreg fpreg; | |||
| 571 | struct reg reg; | |||
| 572 | #ifdef COMPAT_FREEBSD321 | |||
| 573 | struct dbreg32 dbreg32; | |||
| 574 | struct fpreg32 fpreg32; | |||
| 575 | struct reg32 reg32; | |||
| 576 | struct ptrace_io_desc32 piod32; | |||
| 577 | struct ptrace_lwpinfo32 pl32; | |||
| 578 | struct ptrace_vm_entry32 pve32; | |||
| 579 | #endif | |||
| 580 | char args[sizeof(td->td_sa.args)]; | |||
| 581 | int ptevents; | |||
| 582 | } r; | |||
| 583 | void *addr; | |||
| 584 | int error = 0; | |||
| 585 | #ifdef COMPAT_FREEBSD321 | |||
| 586 | int wrap32 = 0; | |||
| 587 | ||||
| 588 | if (SV_CURPROC_FLAG(SV_ILP32)((((__curthread())->td_proc))->p_sysent->sv_flags & (0x000100))) | |||
| ||||
| 589 | wrap32 = 1; | |||
| 590 | #endif | |||
| 591 | AUDIT_ARG_PID(uap->pid)do { if ((__builtin_expect((((__curthread()))->td_pflags & 0x01000000), 0))) audit_arg_pid((uap->pid)); } while (0); | |||
| 592 | AUDIT_ARG_CMD(uap->req)do { if ((__builtin_expect((((__curthread()))->td_pflags & 0x01000000), 0))) audit_arg_cmd((uap->req)); } while (0); | |||
| 593 | AUDIT_ARG_VALUE(uap->data)do { if ((__builtin_expect((((__curthread()))->td_pflags & 0x01000000), 0))) audit_arg_value((uap->data)); } while ( 0); | |||
| 594 | addr = &r; | |||
| 595 | switch (uap->req) { | |||
| 596 | case PT_GET_EVENT_MASK25: | |||
| 597 | case PT_LWPINFO13: | |||
| 598 | case PT_GET_SC_ARGS27: | |||
| 599 | break; | |||
| 600 | case PT_GETREGS33: | |||
| 601 | BZERO(&r.reg, sizeof r.reg); | |||
| 602 | break; | |||
| 603 | case PT_GETFPREGS35: | |||
| 604 | BZERO(&r.fpreg, sizeof r.fpreg); | |||
| 605 | break; | |||
| 606 | case PT_GETDBREGS37: | |||
| 607 | BZERO(&r.dbreg, sizeof r.dbreg); | |||
| 608 | break; | |||
| 609 | case PT_SETREGS34: | |||
| 610 | error = COPYIN(uap->addr, &r.reg, sizeof r.reg); | |||
| 611 | break; | |||
| 612 | case PT_SETFPREGS36: | |||
| 613 | error = COPYIN(uap->addr, &r.fpreg, sizeof r.fpreg); | |||
| 614 | break; | |||
| 615 | case PT_SETDBREGS38: | |||
| 616 | error = COPYIN(uap->addr, &r.dbreg, sizeof r.dbreg); | |||
| 617 | break; | |||
| 618 | case PT_SET_EVENT_MASK26: | |||
| 619 | if (uap->data != sizeof(r.ptevents)) | |||
| 620 | error = EINVAL22; | |||
| 621 | else | |||
| 622 | error = copyin(uap->addr, &r.ptevents, uap->data); | |||
| 623 | break; | |||
| 624 | case PT_IO12: | |||
| 625 | error = COPYIN(uap->addr, &r.piod, sizeof r.piod); | |||
| 626 | break; | |||
| 627 | case PT_VM_ENTRY41: | |||
| 628 | error = COPYIN(uap->addr, &r.pve, sizeof r.pve); | |||
| 629 | break; | |||
| 630 | default: | |||
| 631 | addr = uap->addr; | |||
| 632 | break; | |||
| 633 | } | |||
| 634 | if (error) | |||
| 635 | return (error); | |||
| 636 | ||||
| 637 | error = kern_ptrace(td, uap->req, uap->pid, addr, uap->data); | |||
| 638 | if (error) | |||
| 639 | return (error); | |||
| 640 | ||||
| 641 | switch (uap->req) { | |||
| 642 | case PT_VM_ENTRY41: | |||
| 643 | error = COPYOUT(&r.pve, uap->addr, sizeof r.pve); | |||
| 644 | break; | |||
| 645 | case PT_IO12: | |||
| 646 | error = COPYOUT(&r.piod, uap->addr, sizeof r.piod); | |||
| 647 | break; | |||
| 648 | case PT_GETREGS33: | |||
| 649 | error = COPYOUT(&r.reg, uap->addr, sizeof r.reg); | |||
| 650 | break; | |||
| 651 | case PT_GETFPREGS35: | |||
| 652 | error = COPYOUT(&r.fpreg, uap->addr, sizeof r.fpreg); | |||
| 653 | break; | |||
| 654 | case PT_GETDBREGS37: | |||
| 655 | error = COPYOUT(&r.dbreg, uap->addr, sizeof r.dbreg); | |||
| 656 | break; | |||
| 657 | case PT_GET_EVENT_MASK25: | |||
| 658 | /* NB: The size in uap->data is validated in kern_ptrace(). */ | |||
| 659 | error = copyout(&r.ptevents, uap->addr, uap->data); | |||
| 660 | break; | |||
| 661 | case PT_LWPINFO13: | |||
| 662 | /* NB: The size in uap->data is validated in kern_ptrace(). */ | |||
| 663 | error = copyout(&r.pl, uap->addr, uap->data); | |||
| ||||
| 664 | break; | |||
| 665 | case PT_GET_SC_ARGS27: | |||
| 666 | error = copyout(r.args, uap->addr, MIN(uap->data,(((uap->data)<(sizeof(r.args)))?(uap->data):(sizeof( r.args))) | |||
| 667 | sizeof(r.args))(((uap->data)<(sizeof(r.args)))?(uap->data):(sizeof( r.args)))); | |||
| 668 | break; | |||
| 669 | } | |||
| 670 | ||||
| 671 | return (error); | |||
| 672 | } | |||
| 673 | #undef COPYIN | |||
| 674 | #undef COPYOUT | |||
| 675 | #undef BZERO | |||
| 676 | ||||
| 677 | #ifdef COMPAT_FREEBSD321 | |||
| 678 | /* | |||
| 679 | * PROC_READ(regs, td2, addr); | |||
| 680 | * becomes either: | |||
| 681 | * proc_read_regs(td2, addr); | |||
| 682 | * or | |||
| 683 | * proc_read_regs32(td2, addr); | |||
| 684 | * .. except this is done at runtime. There is an additional | |||
| 685 | * complication in that PROC_WRITE disallows 32 bit consumers | |||
| 686 | * from writing to 64 bit address space targets. | |||
| 687 | */ | |||
| 688 | #define PROC_READ(w, t, a) wrap32 ? \ | |||
| 689 | proc_read_ ## w ## 32(t, a) : \ | |||
| 690 | proc_read_ ## w (t, a) | |||
| 691 | #define PROC_WRITE(w, t, a) wrap32 ? \ | |||
| 692 | (safe ? proc_write_ ## w ## 32(t, a) : EINVAL22 ) : \ | |||
| 693 | proc_write_ ## w (t, a) | |||
| 694 | #else | |||
| 695 | #define PROC_READ(w, t, a) proc_read_ ## w (t, a) | |||
| 696 | #define PROC_WRITE(w, t, a) proc_write_ ## w (t, a) | |||
| 697 | #endif | |||
| 698 | ||||
| 699 | void | |||
| 700 | proc_set_traced(struct proc *p, bool stop) | |||
| 701 | { | |||
| 702 | ||||
| 703 | sx_assert(&proctree_lock, SX_XLOCKED)_sx_assert(((&proctree_lock)), ((0x00000004)), ("/root/freebsd/sys/kern/sys_process.c" ), (703)); | |||
| 704 | PROC_LOCK_ASSERT(p, MA_OWNED)__mtx_assert(&(((&(p)->p_mtx)))->mtx_lock, (((0x00000004 ))), ("/root/freebsd/sys/kern/sys_process.c"), (704)); | |||
| 705 | p->p_flag |= P_TRACED0x00800; | |||
| 706 | if (stop) | |||
| 707 | p->p_flag2 |= P2_PTRACE_FSTP0x00000010; | |||
| 708 | p->p_ptevents = PTRACE_DEFAULT(0x0001); | |||
| 709 | } | |||
| 710 | ||||
| 711 | int | |||
| 712 | kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data) | |||
| 713 | { | |||
| 714 | struct iovec iov; | |||
| 715 | struct uio uio; | |||
| 716 | struct proc *curp, *p, *pp; | |||
| 717 | struct thread *td2 = NULL((void *)0), *td3; | |||
| 718 | struct ptrace_io_desc *piod = NULL((void *)0); | |||
| 719 | struct ptrace_lwpinfo *pl; | |||
| 720 | int error, num, tmp; | |||
| 721 | int proctree_locked = 0; | |||
| 722 | lwpid_t tid = 0, *buf; | |||
| 723 | #ifdef COMPAT_FREEBSD321 | |||
| 724 | int wrap32 = 0, safe = 0; | |||
| 725 | struct ptrace_io_desc32 *piod32 = NULL((void *)0); | |||
| 726 | struct ptrace_lwpinfo32 *pl32 = NULL((void *)0); | |||
| 727 | struct ptrace_lwpinfo plr; | |||
| 728 | #endif | |||
| 729 | ||||
| 730 | curp = td->td_proc; | |||
| 731 | ||||
| 732 | /* Lock proctree before locking the process. */ | |||
| 733 | switch (req) { | |||
| 734 | case PT_TRACE_ME0: | |||
| 735 | case PT_ATTACH10: | |||
| 736 | case PT_STEP9: | |||
| 737 | case PT_CONTINUE7: | |||
| 738 | case PT_TO_SCE20: | |||
| 739 | case PT_TO_SCX21: | |||
| 740 | case PT_SYSCALL22: | |||
| 741 | case PT_FOLLOW_FORK23: | |||
| 742 | case PT_LWP_EVENTS24: | |||
| 743 | case PT_GET_EVENT_MASK25: | |||
| 744 | case PT_SET_EVENT_MASK26: | |||
| 745 | case PT_DETACH11: | |||
| 746 | case PT_GET_SC_ARGS27: | |||
| 747 | sx_xlock(&proctree_lock)(void)_sx_xlock(((&proctree_lock)), 0, ("/root/freebsd/sys/kern/sys_process.c" ), (747)); | |||
| 748 | proctree_locked = 1; | |||
| 749 | break; | |||
| 750 | default: | |||
| 751 | break; | |||
| 752 | } | |||
| 753 | ||||
| 754 | if (req == PT_TRACE_ME0) { | |||
| 755 | p = td->td_proc; | |||
| 756 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (756)); | |||
| 757 | } else { | |||
| 758 | if (pid <= PID_MAX99999) { | |||
| 759 | if ((p = pfind(pid)) == NULL((void *)0)) { | |||
| 760 | if (proctree_locked) | |||
| 761 | sx_xunlock(&proctree_lock)_sx_xunlock(((&proctree_lock)), ("/root/freebsd/sys/kern/sys_process.c" ), (761)); | |||
| 762 | return (ESRCH3); | |||
| 763 | } | |||
| 764 | } else { | |||
| 765 | td2 = tdfind(pid, -1); | |||
| 766 | if (td2 == NULL((void *)0)) { | |||
| 767 | if (proctree_locked) | |||
| 768 | sx_xunlock(&proctree_lock)_sx_xunlock(((&proctree_lock)), ("/root/freebsd/sys/kern/sys_process.c" ), (768)); | |||
| 769 | return (ESRCH3); | |||
| 770 | } | |||
| 771 | p = td2->td_proc; | |||
| 772 | tid = pid; | |||
| 773 | pid = p->p_pid; | |||
| 774 | } | |||
| 775 | } | |||
| 776 | AUDIT_ARG_PROCESS(p)do { if ((__builtin_expect((((__curthread()))->td_pflags & 0x01000000), 0))) audit_arg_process((p)); } while (0); | |||
| 777 | ||||
| 778 | if ((p->p_flag & P_WEXIT0x02000) != 0) { | |||
| 779 | error = ESRCH3; | |||
| 780 | goto fail; | |||
| 781 | } | |||
| 782 | if ((error = p_cansee(td, p)) != 0) | |||
| 783 | goto fail; | |||
| 784 | ||||
| 785 | if ((error = p_candebug(td, p)) != 0) | |||
| 786 | goto fail; | |||
| 787 | ||||
| 788 | /* | |||
| 789 | * System processes can't be debugged. | |||
| 790 | */ | |||
| 791 | if ((p->p_flag & P_SYSTEM0x00200) != 0) { | |||
| 792 | error = EINVAL22; | |||
| 793 | goto fail; | |||
| 794 | } | |||
| 795 | ||||
| 796 | if (tid == 0) { | |||
| 797 | if ((p->p_flag & P_STOPPED_TRACE0x40000) != 0) { | |||
| 798 | KASSERT(p->p_xthread != NULL, ("NULL p_xthread"))do { if (__builtin_expect((!(p->p_xthread != ((void *)0))) , 0)) panic ("NULL p_xthread"); } while (0); | |||
| 799 | td2 = p->p_xthread; | |||
| 800 | } else { | |||
| 801 | td2 = FIRST_THREAD_IN_PROC(p)((&(p)->p_threads)->tqh_first); | |||
| 802 | } | |||
| 803 | tid = td2->td_tid; | |||
| 804 | } | |||
| 805 | ||||
| 806 | #ifdef COMPAT_FREEBSD321 | |||
| 807 | /* | |||
| 808 | * Test if we're a 32 bit client and what the target is. | |||
| 809 | * Set the wrap controls accordingly. | |||
| 810 | */ | |||
| 811 | if (SV_CURPROC_FLAG(SV_ILP32)((((__curthread())->td_proc))->p_sysent->sv_flags & (0x000100))) { | |||
| 812 | if (SV_PROC_FLAG(td2->td_proc, SV_ILP32)((td2->td_proc)->p_sysent->sv_flags & (0x000100) )) | |||
| 813 | safe = 1; | |||
| 814 | wrap32 = 1; | |||
| 815 | } | |||
| 816 | #endif | |||
| 817 | /* | |||
| 818 | * Permissions check | |||
| 819 | */ | |||
| 820 | switch (req) { | |||
| 821 | case PT_TRACE_ME0: | |||
| 822 | /* | |||
| 823 | * Always legal, when there is a parent process which | |||
| 824 | * could trace us. Otherwise, reject. | |||
| 825 | */ | |||
| 826 | if ((p->p_flag & P_TRACED0x00800) != 0) { | |||
| 827 | error = EBUSY16; | |||
| 828 | goto fail; | |||
| 829 | } | |||
| 830 | if (p->p_pptr == initproc) { | |||
| 831 | error = EPERM1; | |||
| 832 | goto fail; | |||
| 833 | } | |||
| 834 | break; | |||
| 835 | ||||
| 836 | case PT_ATTACH10: | |||
| 837 | /* Self */ | |||
| 838 | if (p == td->td_proc) { | |||
| 839 | error = EINVAL22; | |||
| 840 | goto fail; | |||
| 841 | } | |||
| 842 | ||||
| 843 | /* Already traced */ | |||
| 844 | if (p->p_flag & P_TRACED0x00800) { | |||
| 845 | error = EBUSY16; | |||
| 846 | goto fail; | |||
| 847 | } | |||
| 848 | ||||
| 849 | /* Can't trace an ancestor if you're being traced. */ | |||
| 850 | if (curp->p_flag & P_TRACED0x00800) { | |||
| 851 | for (pp = curp->p_pptr; pp != NULL((void *)0); pp = pp->p_pptr) { | |||
| 852 | if (pp == p) { | |||
| 853 | error = EINVAL22; | |||
| 854 | goto fail; | |||
| 855 | } | |||
| 856 | } | |||
| 857 | } | |||
| 858 | ||||
| 859 | ||||
| 860 | /* OK */ | |||
| 861 | break; | |||
| 862 | ||||
| 863 | case PT_CLEARSTEP16: | |||
| 864 | /* Allow thread to clear single step for itself */ | |||
| 865 | if (td->td_tid == tid) | |||
| 866 | break; | |||
| 867 | ||||
| 868 | /* FALLTHROUGH */ | |||
| 869 | default: | |||
| 870 | /* not being traced... */ | |||
| 871 | if ((p->p_flag & P_TRACED0x00800) == 0) { | |||
| 872 | error = EPERM1; | |||
| 873 | goto fail; | |||
| 874 | } | |||
| 875 | ||||
| 876 | /* not being traced by YOU */ | |||
| 877 | if (p->p_pptr != td->td_proc) { | |||
| 878 | error = EBUSY16; | |||
| 879 | goto fail; | |||
| 880 | } | |||
| 881 | ||||
| 882 | /* not currently stopped */ | |||
| 883 | if ((p->p_flag & P_STOPPED_TRACE0x40000) == 0 || | |||
| 884 | p->p_suspcount != p->p_numthreads || | |||
| 885 | (p->p_flag & P_WAITED0x01000) == 0) { | |||
| 886 | error = EBUSY16; | |||
| 887 | goto fail; | |||
| 888 | } | |||
| 889 | ||||
| 890 | /* OK */ | |||
| 891 | break; | |||
| 892 | } | |||
| 893 | ||||
| 894 | /* Keep this process around until we finish this request. */ | |||
| 895 | _PHOLD(p)do { __mtx_assert(&(((&((p))->p_mtx)))->mtx_lock , (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c"), (895)); do { if (__builtin_expect((!(!((p)->p_flag & 0x02000 ) || (p) == ((__curthread())->td_proc))), 0)) panic ("PHOLD of exiting process %p" , p); } while (0); (p)->p_lock++; if (((p)->p_flag & 0x10000000) == 0) faultin((p)); } while (0); | |||
| 896 | ||||
| 897 | #ifdef FIX_SSTEP | |||
| 898 | /* | |||
| 899 | * Single step fixup ala procfs | |||
| 900 | */ | |||
| 901 | FIX_SSTEP(td2); | |||
| 902 | #endif | |||
| 903 | ||||
| 904 | /* | |||
| 905 | * Actually do the requests | |||
| 906 | */ | |||
| 907 | ||||
| 908 | td->td_retvaltd_uretoff.tdu_retval[0] = 0; | |||
| 909 | ||||
| 910 | switch (req) { | |||
| 911 | case PT_TRACE_ME0: | |||
| 912 | /* set my trace flag and "owner" so it can read/write me */ | |||
| 913 | proc_set_traced(p, false0); | |||
| 914 | if (p->p_flag & P_PPWAIT0x00010) | |||
| 915 | p->p_flag |= P_PPTRACE0x80000000; | |||
| 916 | CTR1(KTR_PTRACE, "PT_TRACE_ME: pid %d", p->p_pid)(void)0; | |||
| 917 | break; | |||
| 918 | ||||
| 919 | case PT_ATTACH10: | |||
| 920 | /* security check done above */ | |||
| 921 | /* | |||
| 922 | * It would be nice if the tracing relationship was separate | |||
| 923 | * from the parent relationship but that would require | |||
| 924 | * another set of links in the proc struct or for "wait" | |||
| 925 | * to scan the entire proc table. To make life easier, | |||
| 926 | * we just re-parent the process we're trying to trace. | |||
| 927 | * The old parent is remembered so we can put things back | |||
| 928 | * on a "detach". | |||
| 929 | */ | |||
| 930 | proc_set_traced(p, true1); | |||
| 931 | if (p->p_pptr != td->td_proc) { | |||
| 932 | proc_reparent(p, td->td_proc, false0); | |||
| 933 | } | |||
| 934 | CTR2(KTR_PTRACE, "PT_ATTACH: pid %d, oppid %d", p->p_pid,(void)0 | |||
| 935 | p->p_oppid)(void)0; | |||
| 936 | ||||
| 937 | sx_xunlock(&proctree_lock)_sx_xunlock(((&proctree_lock)), ("/root/freebsd/sys/kern/sys_process.c" ), (937)); | |||
| 938 | proctree_locked = 0; | |||
| 939 | MPASS(p->p_xthread == NULL)do { if (__builtin_expect((!((p->p_xthread == ((void *)0)) )), 0)) panic ("Assertion %s failed at %s:%d", "p->p_xthread == NULL" , "/root/freebsd/sys/kern/sys_process.c", 939); } while (0); | |||
| 940 | MPASS((p->p_flag & P_STOPPED_TRACE) == 0)do { if (__builtin_expect((!(((p->p_flag & 0x40000) == 0))), 0)) panic ("Assertion %s failed at %s:%d", "(p->p_flag & P_STOPPED_TRACE) == 0" , "/root/freebsd/sys/kern/sys_process.c", 940); } while (0); | |||
| 941 | ||||
| 942 | /* | |||
| 943 | * If already stopped due to a stop signal, clear the | |||
| 944 | * existing stop before triggering a traced SIGSTOP. | |||
| 945 | */ | |||
| 946 | if ((p->p_flag & P_STOPPED_SIG0x20000) != 0) { | |||
| 947 | PROC_SLOCK(p)__mtx_lock_spin_flags(&((((&(p)->p_slock))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (947)); | |||
| 948 | p->p_flag &= ~(P_STOPPED_SIG0x20000 | P_WAITED0x01000); | |||
| 949 | thread_unsuspend(p); | |||
| 950 | PROC_SUNLOCK(p)__mtx_unlock_spin_flags(&((((&(p)->p_slock))))-> mtx_lock, ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (950 )); | |||
| 951 | } | |||
| 952 | ||||
| 953 | kern_psignal(p, SIGSTOP17); | |||
| 954 | break; | |||
| 955 | ||||
| 956 | case PT_CLEARSTEP16: | |||
| 957 | CTR2(KTR_PTRACE, "PT_CLEARSTEP: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 958 | p->p_pid)(void)0; | |||
| 959 | error = ptrace_clear_single_step(td2); | |||
| 960 | break; | |||
| 961 | ||||
| 962 | case PT_SETSTEP17: | |||
| 963 | CTR2(KTR_PTRACE, "PT_SETSTEP: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 964 | p->p_pid)(void)0; | |||
| 965 | error = ptrace_single_step(td2); | |||
| 966 | break; | |||
| 967 | ||||
| 968 | case PT_SUSPEND18: | |||
| 969 | CTR2(KTR_PTRACE, "PT_SUSPEND: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 970 | p->p_pid)(void)0; | |||
| 971 | td2->td_dbgflags |= TDB_SUSPEND0x00000001; | |||
| 972 | thread_lock(td2)_thread_lock((td2), 0, "/root/freebsd/sys/kern/sys_process.c" , 972); | |||
| 973 | td2->td_flags |= TDF_NEEDSUSPCHK0x00008000; | |||
| 974 | thread_unlock(td2)__mtx_unlock_spin_flags(&(((((td2)->td_lock))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (974)); | |||
| 975 | break; | |||
| 976 | ||||
| 977 | case PT_RESUME19: | |||
| 978 | CTR2(KTR_PTRACE, "PT_RESUME: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 979 | p->p_pid)(void)0; | |||
| 980 | td2->td_dbgflags &= ~TDB_SUSPEND0x00000001; | |||
| 981 | break; | |||
| 982 | ||||
| 983 | case PT_FOLLOW_FORK23: | |||
| 984 | CTR3(KTR_PTRACE, "PT_FOLLOW_FORK: pid %d %s -> %s", p->p_pid,(void)0 | |||
| 985 | p->p_ptevents & PTRACE_FORK ? "enabled" : "disabled",(void)0 | |||
| 986 | data ? "enabled" : "disabled")(void)0; | |||
| 987 | if (data) | |||
| 988 | p->p_ptevents |= PTRACE_FORK0x0008; | |||
| 989 | else | |||
| 990 | p->p_ptevents &= ~PTRACE_FORK0x0008; | |||
| 991 | break; | |||
| 992 | ||||
| 993 | case PT_LWP_EVENTS24: | |||
| 994 | CTR3(KTR_PTRACE, "PT_LWP_EVENTS: pid %d %s -> %s", p->p_pid,(void)0 | |||
| 995 | p->p_ptevents & PTRACE_LWP ? "enabled" : "disabled",(void)0 | |||
| 996 | data ? "enabled" : "disabled")(void)0; | |||
| 997 | if (data) | |||
| 998 | p->p_ptevents |= PTRACE_LWP0x0010; | |||
| 999 | else | |||
| 1000 | p->p_ptevents &= ~PTRACE_LWP0x0010; | |||
| 1001 | break; | |||
| 1002 | ||||
| 1003 | case PT_GET_EVENT_MASK25: | |||
| 1004 | if (data != sizeof(p->p_ptevents)) { | |||
| 1005 | error = EINVAL22; | |||
| 1006 | break; | |||
| 1007 | } | |||
| 1008 | CTR2(KTR_PTRACE, "PT_GET_EVENT_MASK: pid %d mask %#x", p->p_pid,(void)0 | |||
| 1009 | p->p_ptevents)(void)0; | |||
| 1010 | *(int *)addr = p->p_ptevents; | |||
| 1011 | break; | |||
| 1012 | ||||
| 1013 | case PT_SET_EVENT_MASK26: | |||
| 1014 | if (data != sizeof(p->p_ptevents)) { | |||
| 1015 | error = EINVAL22; | |||
| 1016 | break; | |||
| 1017 | } | |||
| 1018 | tmp = *(int *)addr; | |||
| 1019 | if ((tmp & ~(PTRACE_EXEC0x0001 | PTRACE_SCE0x0002 | PTRACE_SCX0x0004 | | |||
| 1020 | PTRACE_FORK0x0008 | PTRACE_LWP0x0010 | PTRACE_VFORK0x0020)) != 0) { | |||
| 1021 | error = EINVAL22; | |||
| 1022 | break; | |||
| 1023 | } | |||
| 1024 | CTR3(KTR_PTRACE, "PT_SET_EVENT_MASK: pid %d mask %#x -> %#x",(void)0 | |||
| 1025 | p->p_pid, p->p_ptevents, tmp)(void)0; | |||
| 1026 | p->p_ptevents = tmp; | |||
| 1027 | break; | |||
| 1028 | ||||
| 1029 | case PT_GET_SC_ARGS27: | |||
| 1030 | CTR1(KTR_PTRACE, "PT_GET_SC_ARGS: pid %d", p->p_pid)(void)0; | |||
| 1031 | if ((td2->td_dbgflags & (TDB_SCE0x00000008 | TDB_SCX0x00000010)) == 0 | |||
| 1032 | #ifdef COMPAT_FREEBSD321 | |||
| 1033 | || (wrap32 && !safe) | |||
| 1034 | #endif | |||
| 1035 | ) { | |||
| 1036 | error = EINVAL22; | |||
| 1037 | break; | |||
| 1038 | } | |||
| 1039 | bzero(addr, sizeof(td2->td_sa.args))__builtin_memset((addr), 0, (sizeof(td2->td_sa.args))); | |||
| 1040 | #ifdef COMPAT_FREEBSD321 | |||
| 1041 | if (wrap32) | |||
| 1042 | for (num = 0; num < nitems(td2->td_sa.args)(sizeof((td2->td_sa.args)) / sizeof((td2->td_sa.args)[0 ])); num++) | |||
| 1043 | ((uint32_t *)addr)[num] = (uint32_t) | |||
| 1044 | td2->td_sa.args[num]; | |||
| 1045 | else | |||
| 1046 | #endif | |||
| 1047 | bcopy(td2->td_sa.args, addr, td2->td_sa.narg *__builtin_memmove((addr), (td2->td_sa.args), (td2->td_sa .narg * sizeof(register_t))) | |||
| 1048 | sizeof(register_t))__builtin_memmove((addr), (td2->td_sa.args), (td2->td_sa .narg * sizeof(register_t))); | |||
| 1049 | break; | |||
| 1050 | ||||
| 1051 | case PT_STEP9: | |||
| 1052 | case PT_CONTINUE7: | |||
| 1053 | case PT_TO_SCE20: | |||
| 1054 | case PT_TO_SCX21: | |||
| 1055 | case PT_SYSCALL22: | |||
| 1056 | case PT_DETACH11: | |||
| 1057 | /* Zero means do not send any signal */ | |||
| 1058 | if (data < 0 || data > _SIG_MAXSIG128) { | |||
| 1059 | error = EINVAL22; | |||
| 1060 | break; | |||
| 1061 | } | |||
| 1062 | ||||
| 1063 | switch (req) { | |||
| 1064 | case PT_STEP9: | |||
| 1065 | CTR3(KTR_PTRACE, "PT_STEP: tid %d (pid %d), sig = %d",(void)0 | |||
| 1066 | td2->td_tid, p->p_pid, data)(void)0; | |||
| 1067 | error = ptrace_single_step(td2); | |||
| 1068 | if (error) | |||
| 1069 | goto out; | |||
| 1070 | break; | |||
| 1071 | case PT_CONTINUE7: | |||
| 1072 | case PT_TO_SCE20: | |||
| 1073 | case PT_TO_SCX21: | |||
| 1074 | case PT_SYSCALL22: | |||
| 1075 | if (addr != (void *)1) { | |||
| 1076 | error = ptrace_set_pc(td2, | |||
| 1077 | (u_long)(uintfptr_t)addr); | |||
| 1078 | if (error) | |||
| 1079 | goto out; | |||
| 1080 | } | |||
| 1081 | switch (req) { | |||
| 1082 | case PT_TO_SCE20: | |||
| 1083 | p->p_ptevents |= PTRACE_SCE0x0002; | |||
| 1084 | CTR4(KTR_PTRACE,(void)0 | |||
| 1085 | "PT_TO_SCE: pid %d, events = %#x, PC = %#lx, sig = %d",(void)0 | |||
| 1086 | p->p_pid, p->p_ptevents,(void)0 | |||
| 1087 | (u_long)(uintfptr_t)addr, data)(void)0; | |||
| 1088 | break; | |||
| 1089 | case PT_TO_SCX21: | |||
| 1090 | p->p_ptevents |= PTRACE_SCX0x0004; | |||
| 1091 | CTR4(KTR_PTRACE,(void)0 | |||
| 1092 | "PT_TO_SCX: pid %d, events = %#x, PC = %#lx, sig = %d",(void)0 | |||
| 1093 | p->p_pid, p->p_ptevents,(void)0 | |||
| 1094 | (u_long)(uintfptr_t)addr, data)(void)0; | |||
| 1095 | break; | |||
| 1096 | case PT_SYSCALL22: | |||
| 1097 | p->p_ptevents |= PTRACE_SYSCALL(0x0002 | 0x0004); | |||
| 1098 | CTR4(KTR_PTRACE,(void)0 | |||
| 1099 | "PT_SYSCALL: pid %d, events = %#x, PC = %#lx, sig = %d",(void)0 | |||
| 1100 | p->p_pid, p->p_ptevents,(void)0 | |||
| 1101 | (u_long)(uintfptr_t)addr, data)(void)0; | |||
| 1102 | break; | |||
| 1103 | case PT_CONTINUE7: | |||
| 1104 | CTR3(KTR_PTRACE,(void)0 | |||
| 1105 | "PT_CONTINUE: pid %d, PC = %#lx, sig = %d",(void)0 | |||
| 1106 | p->p_pid, (u_long)(uintfptr_t)addr, data)(void)0; | |||
| 1107 | break; | |||
| 1108 | } | |||
| 1109 | break; | |||
| 1110 | case PT_DETACH11: | |||
| 1111 | /* | |||
| 1112 | * Reset the process parent. | |||
| 1113 | * | |||
| 1114 | * NB: This clears P_TRACED before reparenting | |||
| 1115 | * a detached process back to its original | |||
| 1116 | * parent. Otherwise the debugee will be set | |||
| 1117 | * as an orphan of the debugger. | |||
| 1118 | */ | |||
| 1119 | p->p_flag &= ~(P_TRACED0x00800 | P_WAITED0x01000); | |||
| 1120 | if (p->p_oppid != p->p_pptr->p_pid) { | |||
| 1121 | PROC_LOCK(p->p_pptr)__mtx_lock_flags(&((((&(p->p_pptr)->p_mtx))))-> mtx_lock, ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1121 )); | |||
| 1122 | sigqueue_take(p->p_ksi); | |||
| 1123 | PROC_UNLOCK(p->p_pptr)__mtx_unlock_flags(&((((&(p->p_pptr)->p_mtx)))) ->mtx_lock, ((0)), ("/root/freebsd/sys/kern/sys_process.c" ), (1123)); | |||
| 1124 | ||||
| 1125 | pp = proc_realparent(p); | |||
| 1126 | proc_reparent(p, pp, false0); | |||
| 1127 | if (pp == initproc) | |||
| 1128 | p->p_sigparent = SIGCHLD20; | |||
| 1129 | CTR3(KTR_PTRACE,(void)0 | |||
| 1130 | "PT_DETACH: pid %d reparented to pid %d, sig %d",(void)0 | |||
| 1131 | p->p_pid, pp->p_pid, data)(void)0; | |||
| 1132 | } else | |||
| 1133 | CTR2(KTR_PTRACE, "PT_DETACH: pid %d, sig %d",(void)0 | |||
| 1134 | p->p_pid, data)(void)0; | |||
| 1135 | p->p_ptevents = 0; | |||
| 1136 | FOREACH_THREAD_IN_PROC(p, td3)for (((td3)) = (((&(p)->p_threads))->tqh_first); (( td3)); ((td3)) = ((((td3)))->td_plist.tqe_next)) { | |||
| 1137 | if ((td3->td_dbgflags & TDB_FSTP0x00001000) != 0) { | |||
| 1138 | sigqueue_delete(&td3->td_sigqueue, | |||
| 1139 | SIGSTOP17); | |||
| 1140 | } | |||
| 1141 | td3->td_dbgflags &= ~(TDB_XSIG0x00000002 | TDB_FSTP0x00001000 | | |||
| 1142 | TDB_SUSPEND0x00000001); | |||
| 1143 | } | |||
| 1144 | ||||
| 1145 | if ((p->p_flag2 & P2_PTRACE_FSTP0x00000010) != 0) { | |||
| 1146 | sigqueue_delete(&p->p_sigqueue, SIGSTOP17); | |||
| 1147 | p->p_flag2 &= ~P2_PTRACE_FSTP0x00000010; | |||
| 1148 | } | |||
| 1149 | ||||
| 1150 | /* should we send SIGCHLD? */ | |||
| 1151 | /* childproc_continued(p); */ | |||
| 1152 | break; | |||
| 1153 | } | |||
| 1154 | ||||
| 1155 | sx_xunlock(&proctree_lock)_sx_xunlock(((&proctree_lock)), ("/root/freebsd/sys/kern/sys_process.c" ), (1155)); | |||
| 1156 | proctree_locked = 0; | |||
| 1157 | ||||
| 1158 | sendsig: | |||
| 1159 | MPASS(proctree_locked == 0)do { if (__builtin_expect((!((proctree_locked == 0))), 0)) panic ("Assertion %s failed at %s:%d", "proctree_locked == 0", "/root/freebsd/sys/kern/sys_process.c" , 1159); } while (0); | |||
| 1160 | ||||
| 1161 | /* | |||
| 1162 | * Clear the pending event for the thread that just | |||
| 1163 | * reported its event (p_xthread). This may not be | |||
| 1164 | * the thread passed to PT_CONTINUE, PT_STEP, etc. if | |||
| 1165 | * the debugger is resuming a different thread. | |||
| 1166 | * | |||
| 1167 | * Deliver any pending signal via the reporting thread. | |||
| 1168 | */ | |||
| 1169 | MPASS(p->p_xthread != NULL)do { if (__builtin_expect((!((p->p_xthread != ((void *)0)) )), 0)) panic ("Assertion %s failed at %s:%d", "p->p_xthread != NULL" , "/root/freebsd/sys/kern/sys_process.c", 1169); } while (0); | |||
| 1170 | p->p_xthread->td_dbgflags &= ~TDB_XSIG0x00000002; | |||
| 1171 | p->p_xthread->td_xsig = data; | |||
| 1172 | p->p_xthread = NULL((void *)0); | |||
| 1173 | p->p_xsig = data; | |||
| 1174 | ||||
| 1175 | /* | |||
| 1176 | * P_WKILLED is insurance that a PT_KILL/SIGKILL | |||
| 1177 | * always works immediately, even if another thread is | |||
| 1178 | * unsuspended first and attempts to handle a | |||
| 1179 | * different signal or if the POSIX.1b style signal | |||
| 1180 | * queue cannot accommodate any new signals. | |||
| 1181 | */ | |||
| 1182 | if (data == SIGKILL9) | |||
| 1183 | proc_wkilled(p); | |||
| 1184 | ||||
| 1185 | /* | |||
| 1186 | * Unsuspend all threads. To leave a thread | |||
| 1187 | * suspended, use PT_SUSPEND to suspend it before | |||
| 1188 | * continuing the process. | |||
| 1189 | */ | |||
| 1190 | PROC_SLOCK(p)__mtx_lock_spin_flags(&((((&(p)->p_slock))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1190)); | |||
| 1191 | p->p_flag &= ~(P_STOPPED_TRACE0x40000 | P_STOPPED_SIG0x20000 | P_WAITED0x01000); | |||
| 1192 | thread_unsuspend(p); | |||
| 1193 | PROC_SUNLOCK(p)__mtx_unlock_spin_flags(&((((&(p)->p_slock))))-> mtx_lock, ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1193 )); | |||
| 1194 | break; | |||
| 1195 | ||||
| 1196 | case PT_WRITE_I4: | |||
| 1197 | case PT_WRITE_D5: | |||
| 1198 | td2->td_dbgflags |= TDB_USERWR0x00000004; | |||
| 1199 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1199)); | |||
| 1200 | error = 0; | |||
| 1201 | if (proc_writemem(td, p, (off_t)(uintptr_t)addr, &data, | |||
| 1202 | sizeof(int)) != sizeof(int)) | |||
| 1203 | error = ENOMEM12; | |||
| 1204 | else | |||
| 1205 | CTR3(KTR_PTRACE, "PT_WRITE: pid %d: %p <= %#x",(void)0 | |||
| 1206 | p->p_pid, addr, data)(void)0; | |||
| 1207 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1207)); | |||
| 1208 | break; | |||
| 1209 | ||||
| 1210 | case PT_READ_I1: | |||
| 1211 | case PT_READ_D2: | |||
| 1212 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1212)); | |||
| 1213 | error = tmp = 0; | |||
| 1214 | if (proc_readmem(td, p, (off_t)(uintptr_t)addr, &tmp, | |||
| 1215 | sizeof(int)) != sizeof(int)) | |||
| 1216 | error = ENOMEM12; | |||
| 1217 | else | |||
| 1218 | CTR3(KTR_PTRACE, "PT_READ: pid %d: %p >= %#x",(void)0 | |||
| 1219 | p->p_pid, addr, tmp)(void)0; | |||
| 1220 | td->td_retvaltd_uretoff.tdu_retval[0] = tmp; | |||
| 1221 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1221)); | |||
| 1222 | break; | |||
| 1223 | ||||
| 1224 | case PT_IO12: | |||
| 1225 | #ifdef COMPAT_FREEBSD321 | |||
| 1226 | if (wrap32) { | |||
| 1227 | piod32 = addr; | |||
| 1228 | iov.iov_base = (void *)(uintptr_t)piod32->piod_addr; | |||
| 1229 | iov.iov_len = piod32->piod_len; | |||
| 1230 | uio.uio_offset = (off_t)(uintptr_t)piod32->piod_offs; | |||
| 1231 | uio.uio_resid = piod32->piod_len; | |||
| 1232 | } else | |||
| 1233 | #endif | |||
| 1234 | { | |||
| 1235 | piod = addr; | |||
| 1236 | iov.iov_base = piod->piod_addr; | |||
| 1237 | iov.iov_len = piod->piod_len; | |||
| 1238 | uio.uio_offset = (off_t)(uintptr_t)piod->piod_offs; | |||
| 1239 | uio.uio_resid = piod->piod_len; | |||
| 1240 | } | |||
| 1241 | uio.uio_iov = &iov; | |||
| 1242 | uio.uio_iovcnt = 1; | |||
| 1243 | uio.uio_segflg = UIO_USERSPACE; | |||
| 1244 | uio.uio_td = td; | |||
| 1245 | #ifdef COMPAT_FREEBSD321 | |||
| 1246 | tmp = wrap32 ? piod32->piod_op : piod->piod_op; | |||
| 1247 | #else | |||
| 1248 | tmp = piod->piod_op; | |||
| 1249 | #endif | |||
| 1250 | switch (tmp) { | |||
| 1251 | case PIOD_READ_D1: | |||
| 1252 | case PIOD_READ_I3: | |||
| 1253 | CTR3(KTR_PTRACE, "PT_IO: pid %d: READ (%p, %#x)",(void)0 | |||
| 1254 | p->p_pid, (uintptr_t)uio.uio_offset, uio.uio_resid)(void)0; | |||
| 1255 | uio.uio_rw = UIO_READ; | |||
| 1256 | break; | |||
| 1257 | case PIOD_WRITE_D2: | |||
| 1258 | case PIOD_WRITE_I4: | |||
| 1259 | CTR3(KTR_PTRACE, "PT_IO: pid %d: WRITE (%p, %#x)",(void)0 | |||
| 1260 | p->p_pid, (uintptr_t)uio.uio_offset, uio.uio_resid)(void)0; | |||
| 1261 | td2->td_dbgflags |= TDB_USERWR0x00000004; | |||
| 1262 | uio.uio_rw = UIO_WRITE; | |||
| 1263 | break; | |||
| 1264 | default: | |||
| 1265 | error = EINVAL22; | |||
| 1266 | goto out; | |||
| 1267 | } | |||
| 1268 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1268)); | |||
| 1269 | error = proc_rwmem(p, &uio); | |||
| 1270 | #ifdef COMPAT_FREEBSD321 | |||
| 1271 | if (wrap32) | |||
| 1272 | piod32->piod_len -= uio.uio_resid; | |||
| 1273 | else | |||
| 1274 | #endif | |||
| 1275 | piod->piod_len -= uio.uio_resid; | |||
| 1276 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1276)); | |||
| 1277 | break; | |||
| 1278 | ||||
| 1279 | case PT_KILL8: | |||
| 1280 | CTR1(KTR_PTRACE, "PT_KILL: pid %d", p->p_pid)(void)0; | |||
| 1281 | data = SIGKILL9; | |||
| 1282 | goto sendsig; /* in PT_CONTINUE above */ | |||
| 1283 | ||||
| 1284 | case PT_SETREGS34: | |||
| 1285 | CTR2(KTR_PTRACE, "PT_SETREGS: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 1286 | p->p_pid)(void)0; | |||
| 1287 | td2->td_dbgflags |= TDB_USERWR0x00000004; | |||
| 1288 | error = PROC_WRITE(regs, td2, addr); | |||
| 1289 | break; | |||
| 1290 | ||||
| 1291 | case PT_GETREGS33: | |||
| 1292 | CTR2(KTR_PTRACE, "PT_GETREGS: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 1293 | p->p_pid)(void)0; | |||
| 1294 | error = PROC_READ(regs, td2, addr); | |||
| 1295 | break; | |||
| 1296 | ||||
| 1297 | case PT_SETFPREGS36: | |||
| 1298 | CTR2(KTR_PTRACE, "PT_SETFPREGS: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 1299 | p->p_pid)(void)0; | |||
| 1300 | td2->td_dbgflags |= TDB_USERWR0x00000004; | |||
| 1301 | error = PROC_WRITE(fpregs, td2, addr); | |||
| 1302 | break; | |||
| 1303 | ||||
| 1304 | case PT_GETFPREGS35: | |||
| 1305 | CTR2(KTR_PTRACE, "PT_GETFPREGS: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 1306 | p->p_pid)(void)0; | |||
| 1307 | error = PROC_READ(fpregs, td2, addr); | |||
| 1308 | break; | |||
| 1309 | ||||
| 1310 | case PT_SETDBREGS38: | |||
| 1311 | CTR2(KTR_PTRACE, "PT_SETDBREGS: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 1312 | p->p_pid)(void)0; | |||
| 1313 | td2->td_dbgflags |= TDB_USERWR0x00000004; | |||
| 1314 | error = PROC_WRITE(dbregs, td2, addr); | |||
| 1315 | break; | |||
| 1316 | ||||
| 1317 | case PT_GETDBREGS37: | |||
| 1318 | CTR2(KTR_PTRACE, "PT_GETDBREGS: tid %d (pid %d)", td2->td_tid,(void)0 | |||
| 1319 | p->p_pid)(void)0; | |||
| 1320 | error = PROC_READ(dbregs, td2, addr); | |||
| 1321 | break; | |||
| 1322 | ||||
| 1323 | case PT_LWPINFO13: | |||
| 1324 | if (data <= 0 || | |||
| 1325 | #ifdef COMPAT_FREEBSD321 | |||
| 1326 | (!wrap32 && data > sizeof(*pl)) || | |||
| 1327 | (wrap32 && data > sizeof(*pl32))) { | |||
| 1328 | #else | |||
| 1329 | data > sizeof(*pl)) { | |||
| 1330 | #endif | |||
| 1331 | error = EINVAL22; | |||
| 1332 | break; | |||
| 1333 | } | |||
| 1334 | #ifdef COMPAT_FREEBSD321 | |||
| 1335 | if (wrap32) { | |||
| 1336 | pl = &plr; | |||
| 1337 | pl32 = addr; | |||
| 1338 | } else | |||
| 1339 | #endif | |||
| 1340 | pl = addr; | |||
| 1341 | bzero(pl, sizeof(*pl))__builtin_memset((pl), 0, (sizeof(*pl))); | |||
| 1342 | pl->pl_lwpid = td2->td_tid; | |||
| 1343 | pl->pl_event = PL_EVENT_NONE0; | |||
| 1344 | pl->pl_flags = 0; | |||
| 1345 | if (td2->td_dbgflags & TDB_XSIG0x00000002) { | |||
| 1346 | pl->pl_event = PL_EVENT_SIGNAL1; | |||
| 1347 | if (td2->td_si.si_signo != 0 && | |||
| 1348 | #ifdef COMPAT_FREEBSD321 | |||
| 1349 | ((!wrap32 && data >= offsetof(struct ptrace_lwpinfo,__builtin_offsetof(struct ptrace_lwpinfo, pl_siginfo) | |||
| 1350 | pl_siginfo)__builtin_offsetof(struct ptrace_lwpinfo, pl_siginfo) + sizeof(pl->pl_siginfo)) || | |||
| 1351 | (wrap32 && data >= offsetof(struct ptrace_lwpinfo32,__builtin_offsetof(struct ptrace_lwpinfo32, pl_siginfo) | |||
| 1352 | pl_siginfo)__builtin_offsetof(struct ptrace_lwpinfo32, pl_siginfo) + sizeof(struct siginfo32))) | |||
| 1353 | #else | |||
| 1354 | data >= offsetof(struct ptrace_lwpinfo, pl_siginfo)__builtin_offsetof(struct ptrace_lwpinfo, pl_siginfo) | |||
| 1355 | + sizeof(pl->pl_siginfo) | |||
| 1356 | #endif | |||
| 1357 | ){ | |||
| 1358 | pl->pl_flags |= PL_FLAG_SI0x20; | |||
| 1359 | pl->pl_siginfo = td2->td_si; | |||
| 1360 | } | |||
| 1361 | } | |||
| 1362 | if (td2->td_dbgflags & TDB_SCE0x00000008) | |||
| 1363 | pl->pl_flags |= PL_FLAG_SCE0x04; | |||
| 1364 | else if (td2->td_dbgflags & TDB_SCX0x00000010) | |||
| 1365 | pl->pl_flags |= PL_FLAG_SCX0x08; | |||
| 1366 | if (td2->td_dbgflags & TDB_EXEC0x00000020) | |||
| 1367 | pl->pl_flags |= PL_FLAG_EXEC0x10; | |||
| 1368 | if (td2->td_dbgflags & TDB_FORK0x00000040) { | |||
| 1369 | pl->pl_flags |= PL_FLAG_FORKED0x40; | |||
| 1370 | pl->pl_child_pid = td2->td_dbg_forked; | |||
| 1371 | if (td2->td_dbgflags & TDB_VFORK0x00000800) | |||
| 1372 | pl->pl_flags |= PL_FLAG_VFORKED0x400; | |||
| 1373 | } else if ((td2->td_dbgflags & (TDB_SCX0x00000010 | TDB_VFORK0x00000800)) == | |||
| 1374 | TDB_VFORK0x00000800) | |||
| 1375 | pl->pl_flags |= PL_FLAG_VFORK_DONE0x800; | |||
| 1376 | if (td2->td_dbgflags & TDB_CHILD0x00000100) | |||
| 1377 | pl->pl_flags |= PL_FLAG_CHILD0x80; | |||
| 1378 | if (td2->td_dbgflags & TDB_BORN0x00000200) | |||
| 1379 | pl->pl_flags |= PL_FLAG_BORN0x100; | |||
| 1380 | if (td2->td_dbgflags & TDB_EXIT0x00000400) | |||
| 1381 | pl->pl_flags |= PL_FLAG_EXITED0x200; | |||
| 1382 | pl->pl_sigmask = td2->td_sigmask; | |||
| 1383 | pl->pl_siglist = td2->td_siglisttd_sigqueue.sq_signals; | |||
| 1384 | strcpy(pl->pl_tdname, td2->td_name); | |||
| 1385 | if ((td2->td_dbgflags & (TDB_SCE0x00000008 | TDB_SCX0x00000010)) != 0) { | |||
| 1386 | pl->pl_syscall_code = td2->td_sa.code; | |||
| 1387 | pl->pl_syscall_narg = td2->td_sa.narg; | |||
| 1388 | } else { | |||
| 1389 | pl->pl_syscall_code = 0; | |||
| 1390 | pl->pl_syscall_narg = 0; | |||
| 1391 | } | |||
| 1392 | #ifdef COMPAT_FREEBSD321 | |||
| 1393 | if (wrap32) | |||
| 1394 | ptrace_lwpinfo_to32(pl, pl32); | |||
| 1395 | #endif | |||
| 1396 | CTR6(KTR_PTRACE,(void)0 | |||
| 1397 | "PT_LWPINFO: tid %d (pid %d) event %d flags %#x child pid %d syscall %d",(void)0 | |||
| 1398 | td2->td_tid, p->p_pid, pl->pl_event, pl->pl_flags,(void)0 | |||
| 1399 | pl->pl_child_pid, pl->pl_syscall_code)(void)0; | |||
| 1400 | break; | |||
| 1401 | ||||
| 1402 | case PT_GETNUMLWPS14: | |||
| 1403 | CTR2(KTR_PTRACE, "PT_GETNUMLWPS: pid %d: %d threads", p->p_pid,(void)0 | |||
| 1404 | p->p_numthreads)(void)0; | |||
| 1405 | td->td_retvaltd_uretoff.tdu_retval[0] = p->p_numthreads; | |||
| 1406 | break; | |||
| 1407 | ||||
| 1408 | case PT_GETLWPLIST15: | |||
| 1409 | CTR3(KTR_PTRACE, "PT_GETLWPLIST: pid %d: data %d, actual %d",(void)0 | |||
| 1410 | p->p_pid, data, p->p_numthreads)(void)0; | |||
| 1411 | if (data <= 0) { | |||
| 1412 | error = EINVAL22; | |||
| 1413 | break; | |||
| 1414 | } | |||
| 1415 | num = imin(p->p_numthreads, data); | |||
| 1416 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1416)); | |||
| 1417 | buf = malloc(num * sizeof(lwpid_t), M_TEMP, M_WAITOK0x0002); | |||
| 1418 | tmp = 0; | |||
| 1419 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1419)); | |||
| 1420 | FOREACH_THREAD_IN_PROC(p, td2)for (((td2)) = (((&(p)->p_threads))->tqh_first); (( td2)); ((td2)) = ((((td2)))->td_plist.tqe_next)) { | |||
| 1421 | if (tmp >= num) | |||
| 1422 | break; | |||
| 1423 | buf[tmp++] = td2->td_tid; | |||
| 1424 | } | |||
| 1425 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1425)); | |||
| 1426 | error = copyout(buf, addr, tmp * sizeof(lwpid_t)); | |||
| 1427 | free(buf, M_TEMP); | |||
| 1428 | if (!error) | |||
| 1429 | td->td_retvaltd_uretoff.tdu_retval[0] = tmp; | |||
| 1430 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1430)); | |||
| 1431 | break; | |||
| 1432 | ||||
| 1433 | case PT_VM_TIMESTAMP40: | |||
| 1434 | CTR2(KTR_PTRACE, "PT_VM_TIMESTAMP: pid %d: timestamp %d",(void)0 | |||
| 1435 | p->p_pid, p->p_vmspace->vm_map.timestamp)(void)0; | |||
| 1436 | td->td_retvaltd_uretoff.tdu_retval[0] = p->p_vmspace->vm_map.timestamp; | |||
| 1437 | break; | |||
| 1438 | ||||
| 1439 | case PT_VM_ENTRY41: | |||
| 1440 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1440)); | |||
| 1441 | #ifdef COMPAT_FREEBSD321 | |||
| 1442 | if (wrap32) | |||
| 1443 | error = ptrace_vm_entry32(td, p, addr); | |||
| 1444 | else | |||
| 1445 | #endif | |||
| 1446 | error = ptrace_vm_entry(td, p, addr); | |||
| 1447 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1447)); | |||
| 1448 | break; | |||
| 1449 | ||||
| 1450 | default: | |||
| 1451 | #ifdef __HAVE_PTRACE_MACHDEP | |||
| 1452 | if (req >= PT_FIRSTMACH64) { | |||
| 1453 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1453)); | |||
| 1454 | error = cpu_ptrace(td2, req, addr, data); | |||
| 1455 | PROC_LOCK(p)__mtx_lock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1455)); | |||
| 1456 | } else | |||
| 1457 | #endif | |||
| 1458 | /* Unknown request. */ | |||
| 1459 | error = EINVAL22; | |||
| 1460 | break; | |||
| 1461 | } | |||
| 1462 | ||||
| 1463 | out: | |||
| 1464 | /* Drop our hold on this process now that the request has completed. */ | |||
| 1465 | _PRELE(p)do { __mtx_assert(&(((&((p))->p_mtx)))->mtx_lock , (((0x00000004))), ("/root/freebsd/sys/kern/sys_process.c"), (1465)); do { do { if (__builtin_expect((!((p)->p_lock > 0)), 0)) panic ("process %p not held", p); } while (0); } while (0); (--(p)->p_lock); if (((p)->p_flag & 0x02000) && (p)->p_lock == 0) wakeup(&(p)->p_lock); } while (0 ); | |||
| 1466 | fail: | |||
| 1467 | PROC_UNLOCK(p)__mtx_unlock_flags(&((((&(p)->p_mtx))))->mtx_lock , ((0)), ("/root/freebsd/sys/kern/sys_process.c"), (1467)); | |||
| 1468 | if (proctree_locked) | |||
| 1469 | sx_xunlock(&proctree_lock)_sx_xunlock(((&proctree_lock)), ("/root/freebsd/sys/kern/sys_process.c" ), (1469)); | |||
| 1470 | return (error); | |||
| 1471 | } | |||
| 1472 | #undef PROC_READ | |||
| 1473 | #undef PROC_WRITE | |||
| 1474 | ||||
| 1475 | /* | |||
| 1476 | * Stop a process because of a debugging event; | |||
| 1477 | * stay stopped until p->p_step is cleared | |||
| 1478 | * (cleared by PIOCCONT in procfs). | |||
| 1479 | */ | |||
| 1480 | void | |||
| 1481 | stopevent(struct proc *p, unsigned int event, unsigned int val) | |||
| 1482 | { | |||
| 1483 | ||||
| 1484 | PROC_LOCK_ASSERT(p, MA_OWNED)__mtx_assert(&(((&(p)->p_mtx)))->mtx_lock, (((0x00000004 ))), ("/root/freebsd/sys/kern/sys_process.c"), (1484)); | |||
| 1485 | p->p_step = 1; | |||
| 1486 | CTR3(KTR_PTRACE, "stopevent: pid %d event %u val %u", p->p_pid, event,(void)0 | |||
| 1487 | val)(void)0; | |||
| 1488 | do { | |||
| 1489 | if (event != S_EXIT0x00000020) | |||
| 1490 | p->p_xsig = val; | |||
| 1491 | p->p_xthread = NULL((void *)0); | |||
| 1492 | p->p_stype = event; /* Which event caused the stop? */ | |||
| 1493 | wakeup(&p->p_stype); /* Wake up any PIOCWAIT'ing procs */ | |||
| 1494 | msleep(&p->p_step, &p->p_mtx, PWAIT, "stopevent", 0)_sleep((&p->p_step), &(&p->p_mtx)->lock_object , (((80) + 28)), ("stopevent"), tick_sbt * (0), 0, 0x0100); | |||
| 1495 | } while (p->p_step); | |||
| 1496 | } |