netbsd32_ptrace.c revision 1.3
1 /* $NetBSD: netbsd32_ptrace.c,v 1.3 2016/12/15 12:04:18 kamil Exp $ */ 2 3 /* 4 * Copyright (c) 2016 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: netbsd32_ptrace.c,v 1.3 2016/12/15 12:04:18 kamil Exp $"); 34 35 #if defined(_KERNEL_OPT) 36 #include "opt_ptrace.h" 37 #include "opt_compat_netbsd.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/module.h> 42 #include <sys/ptrace.h> 43 #include <sys/syscallvar.h> 44 45 #include <compat/netbsd32/netbsd32.h> 46 #include <compat/netbsd32/netbsd32_syscall.h> 47 #include <compat/netbsd32/netbsd32_syscallargs.h> 48 #include <compat/netbsd32/netbsd32_conv.h> 49 50 extern struct emul emul_netbsd32; 51 52 53 /* 54 * PTRACE methods 55 */ 56 57 static int netbsd32_copyinpiod(struct ptrace_io_desc *, const void *); 58 static void netbsd32_copyoutpiod(const struct ptrace_io_desc *, void *); 59 static int netbsd32_doregs(struct lwp *, struct lwp *, struct uio *); 60 static int netbsd32_dofpregs(struct lwp *, struct lwp *, struct uio *); 61 static int netbsd32_dowatchpoint(struct lwp *, struct lwp *, int, 62 struct ptrace_watchpoint *, void *, register_t *); 63 64 65 static int 66 netbsd32_copyinpiod(struct ptrace_io_desc *piod, const void *addr) 67 { 68 struct netbsd32_ptrace_io_desc piod32; 69 70 int error = copyin(addr, &piod32, sizeof(piod32)); 71 if (error) 72 return error; 73 piod->piod_op = piod32.piod_op; 74 piod->piod_offs = NETBSD32PTR64(piod32.piod_offs); 75 piod->piod_addr = NETBSD32PTR64(piod32.piod_addr); 76 piod->piod_len = (size_t)piod32.piod_len; 77 78 return 0; 79 } 80 81 static void 82 netbsd32_copyoutpiod(const struct ptrace_io_desc *piod, void *addr) 83 { 84 struct netbsd32_ptrace_io_desc piod32; 85 86 piod32.piod_op = piod->piod_op; 87 NETBSD32PTR32(piod32.piod_offs, piod->piod_offs); 88 NETBSD32PTR32(piod32.piod_addr, piod->piod_addr); 89 piod32.piod_len = (netbsd32_size_t)piod->piod_len; 90 (void) copyout(&piod32, addr, sizeof(piod32)); 91 } 92 93 94 static int 95 netbsd32_doregs(struct lwp *curl /*tracer*/, 96 struct lwp *l /*traced*/, 97 struct uio *uio) 98 { 99 #if defined(PT_GETREGS) || defined(PT_SETREGS) 100 process_reg32 r32; 101 int error; 102 char *kv; 103 int kl; 104 105 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 106 return EINVAL; 107 108 kl = sizeof(r32); 109 kv = (char *)&r32; 110 111 kv += uio->uio_offset; 112 kl -= uio->uio_offset; 113 if ((size_t)kl > uio->uio_resid) 114 kl = uio->uio_resid; 115 error = process_read_regs32(l, &r32); 116 if (error == 0) 117 error = uiomove(kv, kl, uio); 118 if (error == 0 && uio->uio_rw == UIO_WRITE) { 119 if (l->l_stat != LSSTOP) 120 error = EBUSY; 121 else 122 error = process_write_regs32(l, &r32); 123 } 124 125 uio->uio_offset = 0; 126 return error; 127 #else 128 return EINVAL; 129 #endif 130 } 131 132 static int 133 netbsd32_dofpregs(struct lwp *curl /*tracer*/, 134 struct lwp *l /*traced*/, 135 struct uio *uio) 136 { 137 #if defined(PT_GETFPREGS) || defined(PT_SETFPREGS) 138 process_fpreg32 r32; 139 int error; 140 char *kv; 141 size_t kl; 142 143 KASSERT(l->l_proc->p_flag & PK_32); 144 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 145 return EINVAL; 146 kl = sizeof(r32); 147 kv = (char *)&r32; 148 149 kv += uio->uio_offset; 150 kl -= uio->uio_offset; 151 if (kl > uio->uio_resid) 152 kl = uio->uio_resid; 153 154 error = process_read_fpregs32(l, &r32, &kl); 155 if (error == 0) 156 error = uiomove(kv, kl, uio); 157 if (error == 0 && uio->uio_rw == UIO_WRITE) { 158 if (l->l_stat != LSSTOP) 159 error = EBUSY; 160 else 161 error = process_write_fpregs32(l, &r32, kl); 162 } 163 uio->uio_offset = 0; 164 return error; 165 #else 166 return EINVAL; 167 #endif 168 } 169 170 static int 171 netbsd32_dowatchpoint(struct lwp *curl /*tracer*/, struct lwp *l /*traced*/, 172 int write, struct ptrace_watchpoint *pw, void *addr, register_t *retval) 173 { 174 175 /* unimplemented */ 176 177 return EINVAL; 178 } 179 180 static struct ptrace_methods netbsd32_ptm = { 181 .ptm_copyinpiod = netbsd32_copyinpiod, 182 .ptm_copyoutpiod = netbsd32_copyoutpiod, 183 .ptm_doregs = netbsd32_doregs, 184 .ptm_dofpregs = netbsd32_dofpregs, 185 .ptm_dowatchpoint = netbsd32_dowatchpoint 186 }; 187 188 189 int 190 netbsd32_ptrace(struct lwp *l, const struct netbsd32_ptrace_args *uap, 191 register_t *retval) 192 { 193 /* { 194 syscallarg(int) req; 195 syscallarg(pid_t) pid; 196 syscallarg(netbsd32_voidp *) addr; 197 syscallarg(int) data; 198 } */ 199 200 return do_ptrace(&netbsd32_ptm, l, SCARG(uap, req), SCARG(uap, pid), 201 SCARG_P32(uap, addr), SCARG(uap, data), retval); 202 } 203 204 static const struct syscall_package compat_ptrace_syscalls[] = { 205 { NETBSD32_SYS_netbsd32_ptrace, 0, (sy_call_t *)netbsd32_ptrace }, 206 { 0, 0, NULL }, 207 }; 208 209 #define DEPS "compat_netbsd32,ptrace_common" 210 211 MODULE(MODULE_CLASS_EXEC, compat_netbsd32_ptrace, DEPS); 212 213 static int 214 compat_netbsd32_ptrace_modcmd(modcmd_t cmd, void *arg) 215 { 216 int error; 217 218 switch (cmd) { 219 case MODULE_CMD_INIT: 220 error = syscall_establish(&emul_netbsd32, 221 compat_ptrace_syscalls); 222 break; 223 case MODULE_CMD_FINI: 224 error = syscall_disestablish(&emul_netbsd32, 225 compat_ptrace_syscalls); 226 break; 227 default: 228 error = ENOTTY; 229 break; 230 } 231 return error; 232 } 233
Indexes created Tue Sep 23 07:09:52 GMT 2025