1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/fcntl.h> 36 #include <sys/ktr.h> 37 #include <sys/proc.h> 38 #include <sys/ptrace.h> 39 #include <sys/reg.h> 40 #include <sys/sdt.h> 41 42 #include <arm64/linux/linux.h> 43 #include <arm64/linux/linux_proto.h> 44 #include <compat/linux/linux_dtrace.h> 45 #include <compat/linux/linux_fork.h> 46 #include <compat/linux/linux_misc.h> 47 #include <compat/linux/linux_mmap.h> 48 #include <compat/linux/linux_util.h> 49 50 #define LINUX_ARCH_AARCH64 0xc00000b7 51 52 /* DTrace init */ 53 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); 54 55 /* DTrace probes */ 56 LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo); 57 58 int 59 linux_set_upcall(struct thread *td, register_t stack) 60 { 61 62 if (stack) 63 td->td_frame->tf_sp = stack; 64 65 /* 66 * The newly created Linux thread returns 67 * to the user space by the same path that a parent does. 68 */ 69 td->td_frame->tf_x[0] = 0; 70 return (0); 71 } 72 73 /* LINUXTODO: deduplicate arm64 linux_mmap2 */ 74 int 75 linux_mmap2(struct thread *td, struct linux_mmap2_args *uap) 76 { 77 78 LIN_SDT_PROBE0(machdep, linux_mmap2, todo); 79 return (linux_mmap_common(td, PTROUT(uap->addr), uap->len, uap->prot, 80 uap->flags, uap->fd, uap->pgoff)); 81 } 82 83 int 84 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap) 85 { 86 87 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, 88 uap->prot)); 89 } 90 91 int 92 linux_madvise(struct thread *td, struct linux_madvise_args *uap) 93 { 94 95 return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav)); 96 } 97 98 int 99 linux_set_cloned_tls(struct thread *td, void *desc) 100 { 101 102 if ((uint64_t)desc >= VM_MAXUSER_ADDRESS) 103 return (EPERM); 104 105 return (cpu_set_user_tls(td, desc)); 106 } 107 108 void 109 bsd_to_linux_regset(const struct reg *b_reg, struct linux_pt_regset *l_regset) 110 { 111 112 KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong), 113 ("%s: size mismatch\n", __func__)); 114 memcpy(l_regset->x, b_reg->x, sizeof(b_reg->x)); 115 116 l_regset->x[30] = b_reg->lr; 117 l_regset->sp = b_reg->sp; 118 l_regset->pc = b_reg->elr; 119 l_regset->cpsr = b_reg->spsr; 120 } 121 122 void 123 linux_to_bsd_regset(struct reg *b_reg, const struct linux_pt_regset *l_regset) 124 { 125 126 KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong), 127 ("%s: size mismatch\n", __func__)); 128 129 memcpy(b_reg->x, l_regset->x, sizeof(b_reg->x)); 130 b_reg->sp = l_regset->sp; 131 b_reg->elr = l_regset->pc; 132 b_reg->spsr = l_regset->cpsr; 133 } 134 135 void 136 linux_ptrace_get_syscall_info_machdep(const struct reg *reg, 137 struct syscall_info *si) 138 { 139 140 si->arch = LINUX_ARCH_AARCH64; 141 si->instruction_pointer = reg->lr; 142 si->stack_pointer = reg->sp; 143 } 144 145 int 146 linux_ptrace_getregs_machdep(struct thread *td __unused, pid_t pid __unused, 147 struct linux_pt_regset *l_regset __unused) 148 { 149 150 return (0); 151 } 152 153