netbsd32_ptrace.c revision 1.5.2.1
1 /* $NetBSD: netbsd32_ptrace.c,v 1.5.2.1 2018/09/11 21:18:32 pgoyette 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 1.5.2.1 2018/09/11 21:18:32 pgoyette 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 /* 51 * PTRACE methods 52 */ 53 54 static int 55 netbsd32_copyin_piod(struct ptrace_io_desc *piod, const void *addr, size_t len) 56 { 57 struct netbsd32_ptrace_io_desc piod32; 58 59 if (len != 0 && sizeof(piod32) != len) 60 return EINVAL; 61 62 int error = copyin(addr, &piod32, sizeof(piod32)); 63 if (error) 64 return error; 65 piod->piod_op = piod32.piod_op; 66 piod->piod_offs = NETBSD32PTR64(piod32.piod_offs); 67 piod->piod_addr = NETBSD32PTR64(piod32.piod_addr); 68 piod->piod_len = (size_t)piod32.piod_len; 69 70 return 0; 71 } 72 73 static int 74 netbsd32_copyout_piod(const struct ptrace_io_desc *piod, void *addr, size_t len) 75 { 76 struct netbsd32_ptrace_io_desc piod32; 77 78 if (len != 0 && sizeof(piod32) != len) 79 return EINVAL; 80 81 piod32.piod_op = piod->piod_op; 82 NETBSD32PTR32(piod32.piod_offs, piod->piod_offs); 83 NETBSD32PTR32(piod32.piod_addr, piod->piod_addr); 84 piod32.piod_len = (netbsd32_size_t)piod->piod_len; 85 return copyout(&piod32, addr, sizeof(piod32)); 86 } 87 88 static int 89 netbsd32_copyin_siginfo(struct ptrace_siginfo *psi, const void *addr, size_t len) 90 { 91 struct netbsd32_ptrace_siginfo psi32; 92 93 if (sizeof(psi32) != len) 94 return EINVAL; 95 96 int error = copyin(addr, &psi32, sizeof(psi32)); 97 if (error) 98 return error; 99 psi->psi_lwpid = psi32.psi_lwpid; 100 netbsd32_si32_to_si(&psi->psi_siginfo, &psi32.psi_siginfo); 101 return 0; 102 } 103 104 static int 105 netbsd32_copyout_siginfo(const struct ptrace_siginfo *psi, void *addr, size_t len) 106 { 107 struct netbsd32_ptrace_siginfo psi32; 108 109 if (sizeof(psi32) != len) 110 return EINVAL; 111 112 psi32.psi_lwpid = psi->psi_lwpid; 113 netbsd32_si_to_si32(&psi32.psi_siginfo, &psi->psi_siginfo); 114 return copyout(&psi32, addr, sizeof(psi32)); 115 } 116 117 static int 118 netbsd32_doregs(struct lwp *curl /*tracer*/, 119 struct lwp *l /*traced*/, 120 struct uio *uio) 121 { 122 #if defined(PT_GETREGS) || defined(PT_SETREGS) 123 process_reg32 r32; 124 int error; 125 char *kv; 126 int kl; 127 128 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 129 return EINVAL; 130 131 kl = sizeof(r32); 132 kv = (char *)&r32; 133 134 kv += uio->uio_offset; 135 kl -= uio->uio_offset; 136 if ((size_t)kl > uio->uio_resid) 137 kl = uio->uio_resid; 138 error = process_read_regs32(l, &r32); 139 if (error == 0) 140 error = uiomove(kv, kl, uio); 141 if (error == 0 && uio->uio_rw == UIO_WRITE) { 142 if (l->l_stat != LSSTOP) 143 error = EBUSY; 144 else 145 error = process_write_regs32(l, &r32); 146 } 147 148 uio->uio_offset = 0; 149 return error; 150 #else 151 return EINVAL; 152 #endif 153 } 154 155 static int 156 netbsd32_dofpregs(struct lwp *curl /*tracer*/, 157 struct lwp *l /*traced*/, 158 struct uio *uio) 159 { 160 #if defined(PT_GETFPREGS) || defined(PT_SETFPREGS) 161 process_fpreg32 r32; 162 int error; 163 char *kv; 164 size_t kl; 165 166 KASSERT(l->l_proc->p_flag & PK_32); 167 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 168 return EINVAL; 169 kl = sizeof(r32); 170 kv = (char *)&r32; 171 172 kv += uio->uio_offset; 173 kl -= uio->uio_offset; 174 if (kl > uio->uio_resid) 175 kl = uio->uio_resid; 176 177 error = process_read_fpregs32(l, &r32, &kl); 178 if (error == 0) 179 error = uiomove(kv, kl, uio); 180 if (error == 0 && uio->uio_rw == UIO_WRITE) { 181 if (l->l_stat != LSSTOP) 182 error = EBUSY; 183 else 184 error = process_write_fpregs32(l, &r32, kl); 185 } 186 uio->uio_offset = 0; 187 return error; 188 #else 189 return EINVAL; 190 #endif 191 } 192 193 static int 194 netbsd32_dodbregs(struct lwp *curl /*tracer*/, 195 struct lwp *l /*traced*/, 196 struct uio *uio) 197 { 198 #if defined(PT_GETDBREGS) || defined(PT_SETDBREGS) 199 process_dbreg32 r32; 200 int error; 201 char *kv; 202 size_t kl; 203 204 KASSERT(l->l_proc->p_flag & PK_32); 205 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 206 return EINVAL; 207 kl = sizeof(r32); 208 kv = (char *)&r32; 209 210 kv += uio->uio_offset; 211 kl -= uio->uio_offset; 212 if (kl > uio->uio_resid) 213 kl = uio->uio_resid; 214 215 error = process_read_dbregs32(l, &r32, &kl); 216 if (error == 0) 217 error = uiomove(kv, kl, uio); 218 if (error == 0 && uio->uio_rw == UIO_WRITE) { 219 if (l->l_stat != LSSTOP) 220 error = EBUSY; 221 else 222 error = process_write_dbregs32(l, &r32, kl); 223 } 224 uio->uio_offset = 0; 225 return error; 226 #else 227 return EINVAL; 228 #endif 229 } 230 231 static struct ptrace_methods netbsd32_ptm = { 232 .ptm_copyin_piod = netbsd32_copyin_piod, 233 .ptm_copyout_piod = netbsd32_copyout_piod, 234 .ptm_copyin_siginfo = netbsd32_copyin_siginfo, 235 .ptm_copyout_siginfo = netbsd32_copyout_siginfo, 236 .ptm_doregs = netbsd32_doregs, 237 .ptm_dofpregs = netbsd32_dofpregs, 238 .ptm_dodbregs = netbsd32_dodbregs 239 }; 240 241 242 int 243 netbsd32_ptrace(struct lwp *l, const struct netbsd32_ptrace_args *uap, 244 register_t *retval) 245 { 246 /* { 247 syscallarg(int) req; 248 syscallarg(pid_t) pid; 249 syscallarg(netbsd32_voidp *) addr; 250 syscallarg(int) data; 251 } */ 252 253 return do_ptrace(&netbsd32_ptm, l, SCARG(uap, req), SCARG(uap, pid), 254 SCARG_P32(uap, addr), SCARG(uap, data), retval); 255 } 256 257 static const struct syscall_package compat_ptrace_syscalls[] = { 258 { NETBSD32_SYS_netbsd32_ptrace, 0, (sy_call_t *)netbsd32_ptrace }, 259 { 0, 0, NULL }, 260 }; 261 262 #define DEPS "compat_netbsd32,ptrace_common" 263 264 MODULE(MODULE_CLASS_EXEC, compat_netbsd32_ptrace, DEPS); 265 266 static int 267 compat_netbsd32_ptrace_modcmd(modcmd_t cmd, void *arg) 268 { 269 int error; 270 271 switch (cmd) { 272 case MODULE_CMD_INIT: 273 error = syscall_establish(&emul_netbsd32, 274 compat_ptrace_syscalls); 275 break; 276 case MODULE_CMD_FINI: 277 error = syscall_disestablish(&emul_netbsd32, 278 compat_ptrace_syscalls); 279 break; 280 default: 281 error = ENOTTY; 282 break; 283 } 284 return error; 285 } 286
Indexes created Sun Sep 28 16:09:52 GMT 2025