netbsd32_ptrace.c revision 1.4
1 /* $NetBSD: netbsd32_ptrace.c,v 1.4 2017/02/23 03:34:22 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 1.4 2017/02/23 03:34:22 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_dodbregs(struct lwp *, struct lwp *, struct uio *); 62 63 64 static int 65 netbsd32_copyinpiod(struct ptrace_io_desc *piod, const void *addr) 66 { 67 struct netbsd32_ptrace_io_desc piod32; 68 69 int error = copyin(addr, &piod32, sizeof(piod32)); 70 if (error) 71 return error; 72 piod->piod_op = piod32.piod_op; 73 piod->piod_offs = NETBSD32PTR64(piod32.piod_offs); 74 piod->piod_addr = NETBSD32PTR64(piod32.piod_addr); 75 piod->piod_len = (size_t)piod32.piod_len; 76 77 return 0; 78 } 79 80 static void 81 netbsd32_copyoutpiod(const struct ptrace_io_desc *piod, void *addr) 82 { 83 struct netbsd32_ptrace_io_desc piod32; 84 85 piod32.piod_op = piod->piod_op; 86 NETBSD32PTR32(piod32.piod_offs, piod->piod_offs); 87 NETBSD32PTR32(piod32.piod_addr, piod->piod_addr); 88 piod32.piod_len = (netbsd32_size_t)piod->piod_len; 89 (void) copyout(&piod32, addr, sizeof(piod32)); 90 } 91 92 93 static int 94 netbsd32_doregs(struct lwp *curl /*tracer*/, 95 struct lwp *l /*traced*/, 96 struct uio *uio) 97 { 98 #if defined(PT_GETREGS) || defined(PT_SETREGS) 99 process_reg32 r32; 100 int error; 101 char *kv; 102 int kl; 103 104 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 105 return EINVAL; 106 107 kl = sizeof(r32); 108 kv = (char *)&r32; 109 110 kv += uio->uio_offset; 111 kl -= uio->uio_offset; 112 if ((size_t)kl > uio->uio_resid) 113 kl = uio->uio_resid; 114 error = process_read_regs32(l, &r32); 115 if (error == 0) 116 error = uiomove(kv, kl, uio); 117 if (error == 0 && uio->uio_rw == UIO_WRITE) { 118 if (l->l_stat != LSSTOP) 119 error = EBUSY; 120 else 121 error = process_write_regs32(l, &r32); 122 } 123 124 uio->uio_offset = 0; 125 return error; 126 #else 127 return EINVAL; 128 #endif 129 } 130 131 static int 132 netbsd32_dofpregs(struct lwp *curl /*tracer*/, 133 struct lwp *l /*traced*/, 134 struct uio *uio) 135 { 136 #if defined(PT_GETFPREGS) || defined(PT_SETFPREGS) 137 process_fpreg32 r32; 138 int error; 139 char *kv; 140 size_t kl; 141 142 KASSERT(l->l_proc->p_flag & PK_32); 143 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 144 return EINVAL; 145 kl = sizeof(r32); 146 kv = (char *)&r32; 147 148 kv += uio->uio_offset; 149 kl -= uio->uio_offset; 150 if (kl > uio->uio_resid) 151 kl = uio->uio_resid; 152 153 error = process_read_fpregs32(l, &r32, &kl); 154 if (error == 0) 155 error = uiomove(kv, kl, uio); 156 if (error == 0 && uio->uio_rw == UIO_WRITE) { 157 if (l->l_stat != LSSTOP) 158 error = EBUSY; 159 else 160 error = process_write_fpregs32(l, &r32, kl); 161 } 162 uio->uio_offset = 0; 163 return error; 164 #else 165 return EINVAL; 166 #endif 167 } 168 169 static int 170 netbsd32_dodbregs(struct lwp *curl /*tracer*/, 171 struct lwp *l /*traced*/, 172 struct uio *uio) 173 { 174 #if defined(PT_GETDBREGS) || defined(PT_SETDBREGS) 175 process_dbreg32 r32; 176 int error; 177 char *kv; 178 size_t kl; 179 180 KASSERT(l->l_proc->p_flag & PK_32); 181 if (uio->uio_offset < 0 || uio->uio_offset > (off_t)sizeof(r32)) 182 return EINVAL; 183 kl = sizeof(r32); 184 kv = (char *)&r32; 185 186 kv += uio->uio_offset; 187 kl -= uio->uio_offset; 188 if (kl > uio->uio_resid) 189 kl = uio->uio_resid; 190 191 error = process_read_dbregs32(l, &r32, &kl); 192 if (error == 0) 193 error = uiomove(kv, kl, uio); 194 if (error == 0 && uio->uio_rw == UIO_WRITE) { 195 if (l->l_stat != LSSTOP) 196 error = EBUSY; 197 else 198 error = process_write_dbregs32(l, &r32, kl); 199 } 200 uio->uio_offset = 0; 201 return error; 202 #else 203 return EINVAL; 204 #endif 205 } 206 207 static struct ptrace_methods netbsd32_ptm = { 208 .ptm_copyinpiod = netbsd32_copyinpiod, 209 .ptm_copyoutpiod = netbsd32_copyoutpiod, 210 .ptm_doregs = netbsd32_doregs, 211 .ptm_dofpregs = netbsd32_dofpregs, 212 .ptm_dodbregs = netbsd32_dodbregs 213 }; 214 215 216 int 217 netbsd32_ptrace(struct lwp *l, const struct netbsd32_ptrace_args *uap, 218 register_t *retval) 219 { 220 /* { 221 syscallarg(int) req; 222 syscallarg(pid_t) pid; 223 syscallarg(netbsd32_voidp *) addr; 224 syscallarg(int) data; 225 } */ 226 227 return do_ptrace(&netbsd32_ptm, l, SCARG(uap, req), SCARG(uap, pid), 228 SCARG_P32(uap, addr), SCARG(uap, data), retval); 229 } 230 231 static const struct syscall_package compat_ptrace_syscalls[] = { 232 { NETBSD32_SYS_netbsd32_ptrace, 0, (sy_call_t *)netbsd32_ptrace }, 233 { 0, 0, NULL }, 234 }; 235 236 #define DEPS "compat_netbsd32,ptrace_common" 237 238 MODULE(MODULE_CLASS_EXEC, compat_netbsd32_ptrace, DEPS); 239 240 static int 241 compat_netbsd32_ptrace_modcmd(modcmd_t cmd, void *arg) 242 { 243 int error; 244 245 switch (cmd) { 246 case MODULE_CMD_INIT: 247 error = syscall_establish(&emul_netbsd32, 248 compat_ptrace_syscalls); 249 break; 250 case MODULE_CMD_FINI: 251 error = syscall_disestablish(&emul_netbsd32, 252 compat_ptrace_syscalls); 253 break; 254 default: 255 error = ENOTTY; 256 break; 257 } 258 return error; 259 } 260
Indexes created Tue Sep 23 14:10:03 GMT 2025