2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2017 Edward Tomasz Napierala <trasz@FreeBSD.org>
7 * This software was developed by SRI International and the University of
8 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
9 * ("CTSRD"), as part of the DARPA CRASH research programme.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
38 #include <sys/ptrace.h>
39 #include <sys/syscallsubr.h>
41 #include <machine/pcb.h>
42 #include <machine/reg.h>
44 #include <amd64/linux/linux.h>
45 #include <amd64/linux/linux_proto.h>
46 #include <compat/linux/linux_signal.h>
48 #define LINUX_PTRACE_TRACEME 0
49 #define LINUX_PTRACE_PEEKTEXT 1
50 #define LINUX_PTRACE_PEEKDATA 2
51 #define LINUX_PTRACE_PEEKUSER 3
52 #define LINUX_PTRACE_POKETEXT 4
53 #define LINUX_PTRACE_POKEDATA 5
54 #define LINUX_PTRACE_POKEUSER 6
55 #define LINUX_PTRACE_CONT 7
56 #define LINUX_PTRACE_KILL 8
57 #define LINUX_PTRACE_SINGLESTEP 9
58 #define LINUX_PTRACE_GETREGS 12
59 #define LINUX_PTRACE_SETREGS 13
60 #define LINUX_PTRACE_GETFPREGS 14
61 #define LINUX_PTRACE_SETFPREGS 15
62 #define LINUX_PTRACE_ATTACH 16
63 #define LINUX_PTRACE_DETACH 17
64 #define LINUX_PTRACE_SYSCALL 24
65 #define LINUX_PTRACE_SETOPTIONS 0x4200
66 #define LINUX_PTRACE_GETREGSET 0x4204
67 #define LINUX_PTRACE_SEIZE 0x4206
69 #define LINUX_PTRACE_O_TRACESYSGOOD 1
70 #define LINUX_PTRACE_O_TRACEFORK 2
71 #define LINUX_PTRACE_O_TRACEVFORK 4
72 #define LINUX_PTRACE_O_TRACECLONE 8
73 #define LINUX_PTRACE_O_TRACEEXEC 16
74 #define LINUX_PTRACE_O_TRACEVFORKDONE 32
75 #define LINUX_PTRACE_O_TRACEEXIT 64
76 #define LINUX_PTRACE_O_TRACESECCOMP 128
77 #define LINUX_PTRACE_O_EXITKILL 1048576
78 #define LINUX_PTRACE_O_SUSPEND_SECCOMP 2097152
80 #define LINUX_NT_PRSTATUS 1
82 #define LINUX_PTRACE_O_MASK (LINUX_PTRACE_O_TRACESYSGOOD | \
83 LINUX_PTRACE_O_TRACEFORK | LINUX_PTRACE_O_TRACEVFORK | \
84 LINUX_PTRACE_O_TRACECLONE | LINUX_PTRACE_O_TRACEEXEC | \
85 LINUX_PTRACE_O_TRACEVFORKDONE | LINUX_PTRACE_O_TRACEEXIT | \
86 LINUX_PTRACE_O_TRACESECCOMP | LINUX_PTRACE_O_EXITKILL | \
87 LINUX_PTRACE_O_SUSPEND_SECCOMP)
90 map_signum(int lsig, int *bsigp)
99 if (lsig < 0 || lsig > LINUX_SIGRTMAX)
102 bsig = linux_to_bsd_signal(lsig);
110 struct linux_pt_reg {
135 * Translate amd64 ptrace registers between Linux and FreeBSD formats.
136 * The translation is pretty straighforward, for all registers but
137 * orig_rax on Linux side and r_trapno and r_err in FreeBSD.
140 map_regs_to_linux(struct reg *b_reg, struct linux_pt_reg *l_reg)
143 l_reg->r15 = b_reg->r_r15;
144 l_reg->r14 = b_reg->r_r14;
145 l_reg->r13 = b_reg->r_r13;
146 l_reg->r12 = b_reg->r_r12;
147 l_reg->rbp = b_reg->r_rbp;
148 l_reg->rbx = b_reg->r_rbx;
149 l_reg->r11 = b_reg->r_r11;
150 l_reg->r10 = b_reg->r_r10;
151 l_reg->r9 = b_reg->r_r9;
152 l_reg->r8 = b_reg->r_r8;
153 l_reg->rax = b_reg->r_rax;
154 l_reg->rcx = b_reg->r_rcx;
155 l_reg->rdx = b_reg->r_rdx;
156 l_reg->rsi = b_reg->r_rsi;
157 l_reg->rdi = b_reg->r_rdi;
158 l_reg->orig_rax = b_reg->r_rax;
159 l_reg->rip = b_reg->r_rip;
160 l_reg->cs = b_reg->r_cs;
161 l_reg->eflags = b_reg->r_rflags;
162 l_reg->rsp = b_reg->r_rsp;
163 l_reg->ss = b_reg->r_ss;
167 map_regs_from_linux(struct reg *b_reg, struct linux_pt_reg *l_reg)
169 b_reg->r_r15 = l_reg->r15;
170 b_reg->r_r14 = l_reg->r14;
171 b_reg->r_r13 = l_reg->r13;
172 b_reg->r_r12 = l_reg->r12;
173 b_reg->r_r11 = l_reg->r11;
174 b_reg->r_r10 = l_reg->r10;
175 b_reg->r_r9 = l_reg->r9;
176 b_reg->r_r8 = l_reg->r8;
177 b_reg->r_rdi = l_reg->rdi;
178 b_reg->r_rsi = l_reg->rsi;
179 b_reg->r_rbp = l_reg->rbp;
180 b_reg->r_rbx = l_reg->rbx;
181 b_reg->r_rdx = l_reg->rdx;
182 b_reg->r_rcx = l_reg->rcx;
183 b_reg->r_rax = l_reg->rax;
186 * XXX: Are zeroes the right thing to put here?
195 b_reg->r_rip = l_reg->rip;
196 b_reg->r_cs = l_reg->cs;
197 b_reg->r_rflags = l_reg->eflags;
198 b_reg->r_rsp = l_reg->rsp;
199 b_reg->r_ss = l_reg->ss;
203 linux_ptrace_peek(struct thread *td, pid_t pid, void *addr, void *data)
207 error = kern_ptrace(td, PT_READ_I, pid, addr, 0);
209 error = copyout(td->td_retval, data, sizeof(l_int));
210 td->td_retval[0] = error;
216 linux_ptrace_setoptions(struct thread *td, pid_t pid, l_ulong data)
222 if (data & ~LINUX_PTRACE_O_MASK) {
223 printf("%s: unknown ptrace option %lx set; "
224 "returning EINVAL\n",
225 __func__, data & ~LINUX_PTRACE_O_MASK);
230 * PTRACE_O_EXITKILL is ignored, we do that by default.
233 if (data & LINUX_PTRACE_O_TRACESYSGOOD) {
234 printf("%s: PTRACE_O_TRACESYSGOOD not implemented; "
235 "returning EINVAL\n", __func__);
239 if (data & LINUX_PTRACE_O_TRACEFORK)
242 if (data & LINUX_PTRACE_O_TRACEVFORK)
243 mask |= PTRACE_VFORK;
245 if (data & LINUX_PTRACE_O_TRACECLONE)
246 mask |= PTRACE_VFORK;
248 if (data & LINUX_PTRACE_O_TRACEEXEC)
251 if (data & LINUX_PTRACE_O_TRACEVFORKDONE)
252 mask |= PTRACE_VFORK; /* XXX: Close enough? */
254 if (data & LINUX_PTRACE_O_TRACEEXIT) {
255 printf("%s: PTRACE_O_TRACEEXIT not implemented; "
256 "returning EINVAL\n", __func__);
260 return (kern_ptrace(td, PT_SET_EVENT_MASK, pid, &mask, sizeof(mask)));
264 linux_ptrace_getregs(struct thread *td, pid_t pid, void *data)
266 struct ptrace_lwpinfo lwpinfo;
268 struct linux_pt_reg l_reg;
271 error = kern_ptrace(td, PT_GETREGS, pid, &b_reg, 0);
275 map_regs_to_linux(&b_reg, &l_reg);
278 * The strace(1) utility depends on RAX being set to -ENOSYS
281 error = kern_ptrace(td, PT_LWPINFO, pid, &lwpinfo, sizeof(lwpinfo));
283 printf("%s: PT_LWPINFO failed with error %d\n", __func__, error);
286 if (lwpinfo.pl_flags & PL_FLAG_SCE)
287 l_reg.rax = -38; // XXX: Don't hardcode?
289 error = copyout(&l_reg, (void *)data, sizeof(l_reg));
294 linux_ptrace_setregs(struct thread *td, pid_t pid, void *data)
297 struct linux_pt_reg l_reg;
300 error = copyin(data, &l_reg, sizeof(l_reg));
303 map_regs_from_linux(&b_reg, &l_reg);
304 error = kern_ptrace(td, PT_SETREGS, pid, &b_reg, 0);
309 linux_ptrace_getregset(struct thread *td, pid_t pid, l_ulong addr, l_ulong data)
313 case LINUX_NT_PRSTATUS:
314 printf("%s: NT_PRSTATUS not implemented; returning EINVAL\n",
318 printf("%s: PTRACE_GETREGSET request %ld not implemented; "
319 "returning EINVAL\n", __func__, addr);
325 linux_ptrace_seize(struct thread *td, pid_t pid, l_ulong addr, l_ulong data)
328 printf("%s: PTRACE_SEIZE not implemented; returning EINVAL\n", __func__);
333 linux_ptrace(struct thread *td, struct linux_ptrace_args *uap)
339 pid = (pid_t)uap->pid;
340 addr = (void *)uap->addr;
343 case LINUX_PTRACE_TRACEME:
344 error = kern_ptrace(td, PT_TRACE_ME, 0, 0, 0);
346 case LINUX_PTRACE_PEEKTEXT:
347 case LINUX_PTRACE_PEEKDATA:
348 error = linux_ptrace_peek(td, pid, addr, (void *)uap->data);
352 * Linux expects this syscall to read 64 bits, not 32.
354 error = linux_ptrace_peek(td, pid,
355 (void *)(uap->addr + 4), (void *)(uap->data + 4));
357 case LINUX_PTRACE_POKETEXT:
358 error = kern_ptrace(td, PT_WRITE_I, pid, addr, uap->data);
360 case LINUX_PTRACE_POKEDATA:
361 error = kern_ptrace(td, PT_WRITE_D, pid, addr, uap->data);
363 case LINUX_PTRACE_CONT:
364 error = map_signum(uap->data, &sig);
367 error = kern_ptrace(td, PT_CONTINUE, pid, (void *)1, sig);
369 case LINUX_PTRACE_KILL:
370 error = kern_ptrace(td, PT_KILL, pid, addr, uap->data);
372 case LINUX_PTRACE_SINGLESTEP:
373 error = map_signum(uap->data, &sig);
376 error = kern_ptrace(td, PT_STEP, pid, (void *)1, sig);
378 case LINUX_PTRACE_GETREGS:
379 error = linux_ptrace_getregs(td, pid, (void *)uap->data);
381 case LINUX_PTRACE_SETREGS:
382 error = linux_ptrace_setregs(td, pid, (void *)uap->data);
384 case LINUX_PTRACE_ATTACH:
385 error = kern_ptrace(td, PT_ATTACH, pid, addr, uap->data);
387 case LINUX_PTRACE_DETACH:
388 error = map_signum(uap->data, &sig);
391 error = kern_ptrace(td, PT_DETACH, pid, (void *)1, sig);
393 case LINUX_PTRACE_SYSCALL:
394 error = map_signum(uap->data, &sig);
397 error = kern_ptrace(td, PT_SYSCALL, pid, (void *)1, sig);
399 case LINUX_PTRACE_SETOPTIONS:
400 error = linux_ptrace_setoptions(td, pid, uap->data);
402 case LINUX_PTRACE_GETREGSET:
403 error = linux_ptrace_getregset(td, pid, uap->addr, uap->data);
405 case LINUX_PTRACE_SEIZE:
406 error = linux_ptrace_seize(td, pid, uap->addr, uap->data);
409 printf("%s: ptrace(%ld, ...) not implemented; returning EINVAL\n",