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/proc.h> 31 #include <sys/ptrace.h> 32 #include <sys/reg.h> 33 34 #include <vm/vm_param.h> 35 36 #include <arm64/linux/linux.h> 37 #include <arm64/linux/linux_proto.h> 38 #include <compat/linux/linux_fork.h> 39 #include <compat/linux/linux_misc.h> 40 #include <compat/linux/linux_util.h> 41 42 #define LINUX_ARCH_AARCH64 0xc00000b7 43 44 45 int 46 linux_set_upcall(struct thread *td, register_t stack) 47 { 48 49 if (stack) 50 td->td_frame->tf_sp = stack; 51 52 /* 53 * The newly created Linux thread returns 54 * to the user space by the same path that a parent does. 55 */ 56 td->td_frame->tf_x[0] = 0; 57 return (0); 58 } 59 60 int 61 linux_set_cloned_tls(struct thread *td, void *desc) 62 { 63 64 if ((uint64_t)desc >= VM_MAXUSER_ADDRESS) 65 return (EPERM); 66 67 return (cpu_set_user_tls(td, desc)); 68 } 69 70 void 71 bsd_to_linux_regset(const struct reg *b_reg, struct linux_pt_regset *l_regset) 72 { 73 74 KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong), 75 ("%s: size mismatch\n", __func__)); 76 memcpy(l_regset->x, b_reg->x, sizeof(b_reg->x)); 77 78 l_regset->x[30] = b_reg->lr; 79 l_regset->sp = b_reg->sp; 80 l_regset->pc = b_reg->elr; 81 l_regset->cpsr = b_reg->spsr; 82 } 83 84 void 85 linux_to_bsd_regset(struct reg *b_reg, const struct linux_pt_regset *l_regset) 86 { 87 88 KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong), 89 ("%s: size mismatch\n", __func__)); 90 91 memcpy(b_reg->x, l_regset->x, sizeof(b_reg->x)); 92 b_reg->sp = l_regset->sp; 93 b_reg->elr = l_regset->pc; 94 b_reg->spsr = l_regset->cpsr; 95 } 96 97 void 98 linux_ptrace_get_syscall_info_machdep(const struct reg *reg, 99 struct syscall_info *si) 100 { 101 102 si->arch = LINUX_ARCH_AARCH64; 103 si->instruction_pointer = reg->lr; 104 si->stack_pointer = reg->sp; 105 } 106 107 int 108 linux_ptrace_getregs_machdep(struct thread *td __unused, pid_t pid __unused, 109 struct linux_pt_regset *l_regset __unused) 110 { 111 112 return (0); 113 } 114 115 int 116 linux_ptrace_peekuser(struct thread *td, pid_t pid, void *addr, void *data) 117 { 118 119 LINUX_RATELIMIT_MSG_OPT1("PTRACE_PEEKUSER offset %ld not implemented; " 120 "returning EINVAL", (uintptr_t)addr); 121 return (EINVAL); 122 } 123 124 int 125 linux_ptrace_pokeuser(struct thread *td, pid_t pid, void *addr, void *data) 126 { 127 128 LINUX_RATELIMIT_MSG_OPT1("PTRACE_POKEUSER offset %ld " 129 "not implemented; returning EINVAL", (uintptr_t)addr); 130 return (EINVAL); 131 } 132