1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018 Turing Robotic Industries Inc. 5 * Copyright (c) 2000 Marcel Moolenaar 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/fcntl.h> 31 #include <sys/ktr.h> 32 #include <sys/proc.h> 33 #include <sys/ptrace.h> 34 #include <sys/reg.h> 35 36 #include <vm/vm_param.h> 37 38 #include <arm64/linux/linux.h> 39 #include <arm64/linux/linux_proto.h> 40 #include <compat/linux/linux_fork.h> 41 #include <compat/linux/linux_misc.h> 42 #include <compat/linux/linux_util.h> 43 44 #define LINUX_ARCH_AARCH64 0xc00000b7 45 46 47 int 48 linux_set_upcall(struct thread *td, register_t stack) 49 { 50 51 if (stack) 52 td->td_frame->tf_sp = stack; 53 54 /* 55 * The newly created Linux thread returns 56 * to the user space by the same path that a parent does. 57 */ 58 td->td_frame->tf_x[0] = 0; 59 return (0); 60 } 61 62 int 63 linux_set_cloned_tls(struct thread *td, void *desc) 64 { 65 66 if ((uint64_t)desc >= VM_MAXUSER_ADDRESS) 67 return (EPERM); 68 69 return (cpu_set_user_tls(td, desc)); 70 } 71 72 void 73 bsd_to_linux_regset(const struct reg *b_reg, struct linux_pt_regset *l_regset) 74 { 75 76 KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong), 77 ("%s: size mismatch\n", __func__)); 78 memcpy(l_regset->x, b_reg->x, sizeof(b_reg->x)); 79 80 l_regset->x[30] = b_reg->lr; 81 l_regset->sp = b_reg->sp; 82 l_regset->pc = b_reg->elr; 83 l_regset->cpsr = b_reg->spsr; 84 } 85 86 void 87 linux_to_bsd_regset(struct reg *b_reg, const struct linux_pt_regset *l_regset) 88 { 89 90 KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong), 91 ("%s: size mismatch\n", __func__)); 92 93 memcpy(b_reg->x, l_regset->x, sizeof(b_reg->x)); 94 b_reg->sp = l_regset->sp; 95 b_reg->elr = l_regset->pc; 96 b_reg->spsr = l_regset->cpsr; 97 } 98 99 void 100 linux_ptrace_get_syscall_info_machdep(const struct reg *reg, 101 struct syscall_info *si) 102 { 103 104 si->arch = LINUX_ARCH_AARCH64; 105 si->instruction_pointer = reg->lr; 106 si->stack_pointer = reg->sp; 107 } 108 109 int 110 linux_ptrace_getregs_machdep(struct thread *td __unused, pid_t pid __unused, 111 struct linux_pt_regset *l_regset __unused) 112 { 113 114 return (0); 115 } 116 117 int 118 linux_ptrace_peekuser(struct thread *td, pid_t pid, void *addr, void *data) 119 { 120 121 LINUX_RATELIMIT_MSG_OPT1("PTRACE_PEEKUSER offset %ld not implemented; " 122 "returning EINVAL", (uintptr_t)addr); 123 return (EINVAL); 124 } 125 126 int 127 linux_ptrace_pokeuser(struct thread *td, pid_t pid, void *addr, void *data) 128 { 129 130 LINUX_RATELIMIT_MSG_OPT1("PTRACE_POKEUSER offset %ld " 131 "not implemented; returning EINVAL", (uintptr_t)addr); 132 return (EINVAL); 133 } 134