2 * Copyright (c) 2014 Andrew Turner
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/param.h>
29 #include <sys/systm.h>
32 #include <sys/imgact.h>
33 #include <sys/kernel.h>
34 #include <sys/limits.h>
36 #include <sys/mutex.h>
38 #include <sys/ptrace.h>
40 #include <sys/rwlock.h>
41 #include <sys/signalvar.h>
42 #include <sys/syscallsubr.h>
43 #include <sys/sysent.h>
44 #include <sys/sysproto.h>
45 #include <sys/ucontext.h>
47 #include <machine/armreg.h>
48 #include <machine/pcb.h>
50 /* Only used to get/set 32bits VFP regs */
52 cpu_ptrace(struct thread *td, int req, void *arg, int data)
54 #if defined(VFP) && defined(COMPAT_FREEBSD32)
58 if (!SV_CURPROC_FLAG(SV_ILP32))
62 get_fpcontext32(td, &vfp);
63 error = copyout(&vfp, arg, sizeof(vfp));
66 error = copyin(arg, &vfp, sizeof(vfp));
68 set_fpcontext32(td, &vfp);
80 #if defined(VFP) && defined(COMPAT_FREEBSD32)
82 get_arm_vfp(struct regset *rs, struct thread *td, void *buf, size_t *sizep)
85 KASSERT(*sizep == sizeof(mcontext32_vfp_t),
86 ("%s: invalid size", __func__));
87 get_fpcontext32(td, buf);
89 *sizep = sizeof(mcontext32_vfp_t);
94 set_arm_vfp(struct regset *rs, struct thread *td, void *buf,
97 KASSERT(size == sizeof(mcontext32_vfp_t), ("%s: invalid size",
99 set_fpcontext32(td, buf);
103 static struct regset regset_arm_vfp = {
105 .size = sizeof(mcontext32_vfp_t),
109 ELF32_REGSET(regset_arm_vfp);
113 get_arm64_tls(struct regset *rs, struct thread *td, void *buf,
117 KASSERT(*sizep == sizeof(td->td_pcb->pcb_tpidr_el0),
118 ("%s: invalid size", __func__));
119 memcpy(buf, &td->td_pcb->pcb_tpidr_el0,
120 sizeof(td->td_pcb->pcb_tpidr_el0));
122 *sizep = sizeof(td->td_pcb->pcb_tpidr_el0);
127 static struct regset regset_arm64_tls = {
129 .size = sizeof(uint64_t),
130 .get = get_arm64_tls,
132 ELF_REGSET(regset_arm64_tls);
134 #ifdef COMPAT_FREEBSD32
136 get_arm_tls(struct regset *rs, struct thread *td, void *buf,
142 KASSERT(*sizep == sizeof(uint32_t),
143 ("%s: invalid size", __func__));
144 tp = (uint32_t)td->td_pcb->pcb_tpidr_el0;
145 memcpy(buf, &tp, sizeof(tp));
147 *sizep = sizeof(uint32_t);
152 static struct regset regset_arm_tls = {
154 .size = sizeof(uint32_t),
157 ELF32_REGSET(regset_arm_tls);
161 ptrace_set_pc(struct thread *td, u_long addr)
164 td->td_frame->tf_elr = addr;
169 ptrace_single_step(struct thread *td)
171 PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
172 if ((td->td_frame->tf_spsr & PSR_SS) == 0) {
173 td->td_frame->tf_spsr |= PSR_SS;
174 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
175 td->td_dbgflags |= TDB_STEP;
181 ptrace_clear_single_step(struct thread *td)
183 PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
184 td->td_frame->tf_spsr &= ~PSR_SS;
185 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
186 td->td_dbgflags &= ~TDB_STEP;