netbsd32_exec_aout.c revision 1.21.52.2
1 /* $NetBSD: netbsd32_exec_aout.c,v 1.21.52.2 2007/12/27 00:44:24 mjf Exp $ */ 2 /* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */ 3 4 /* 5 * Copyright (c) 1998, 2001 Matthew R. Green. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Copyright (c) 1993, 1994 Christopher G. Demetriou 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. All advertising materials mentioning features or use of this software 44 * must display the following acknowledgement: 45 * This product includes software developed by Christopher G. Demetriou. 46 * 4. The name of the author may not be used to endorse or promote products 47 * derived from this software without specific prior written permission 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 50 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 51 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 52 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 53 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 54 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 55 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 56 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 57 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 58 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_aout.c,v 1.21.52.2 2007/12/27 00:44:24 mjf Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/proc.h> 67 #include <sys/malloc.h> 68 #include <sys/vnode.h> 69 #include <sys/exec.h> 70 #include <sys/exec_aout.h> 71 #include <sys/resourcevar.h> 72 #include <sys/signal.h> 73 #include <sys/signalvar.h> 74 75 #include <compat/netbsd32/netbsd32.h> 76 #ifndef EXEC_AOUT 77 #define EXEC_AOUT 78 #endif 79 #include <compat/netbsd32/netbsd32_exec.h> 80 81 #include <machine/frame.h> 82 #include <machine/netbsd32_machdep.h> 83 84 int netbsd32_copyinargs(struct exec_package *, struct ps_strings *, 85 void *, size_t, const void *, const void *); 86 87 /* 88 * exec_netbsd32_makecmds(): Check if it's an netbsd32 a.out format 89 * executable. 90 * 91 * Given a lwp pointer and an exec package pointer, see if the referent 92 * of the epp is in netbsd32 a.out format. Check 'standard' magic 93 * numbers for this architecture. 94 * 95 * This function, in the former case, or the hook, in the latter, is 96 * responsible for creating a set of vmcmds which can be used to build 97 * the process's vm space and inserting them into the exec package. 98 */ 99 100 int 101 exec_netbsd32_makecmds(struct lwp *l, struct exec_package *epp) 102 { 103 netbsd32_u_long midmag, magic; 104 u_short mid; 105 int error; 106 struct netbsd32_exec *execp = epp->ep_hdr; 107 108 if (epp->ep_hdrvalid < sizeof(struct netbsd32_exec)) 109 return ENOEXEC; 110 111 midmag = (netbsd32_u_long)ntohl(execp->a_midmag); 112 mid = (midmag >> 16) & 0x3ff; 113 magic = midmag & 0xffff; 114 115 midmag = mid << 16 | magic; 116 117 /* this is already needed by setup_stack() */ 118 epp->ep_flags |= EXEC_32; 119 120 switch (midmag) { 121 case (NETBSD32_MID_MACHINE << 16) | ZMAGIC: 122 error = netbsd32_exec_aout_prep_zmagic(l, epp); 123 break; 124 case (NETBSD32_MID_MACHINE << 16) | NMAGIC: 125 error = netbsd32_exec_aout_prep_nmagic(l, epp); 126 break; 127 case (NETBSD32_MID_MACHINE << 16) | OMAGIC: 128 error = netbsd32_exec_aout_prep_omagic(l, epp); 129 break; 130 default: 131 /* Invalid magic */ 132 error = ENOEXEC; 133 break; 134 } 135 136 if (error) { 137 kill_vmcmds(&epp->ep_vmcmds); 138 epp->ep_flags &= ~EXEC_32; 139 } 140 return error; 141 } 142 143 /* 144 * netbsd32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's 145 * exec package 146 * 147 * First, set of the various offsets/lengths in the exec package. 148 * 149 * Then, mark the text image busy (so it can be demand paged) or error 150 * out if this is not possible. Finally, set up vmcmds for the 151 * text, data, bss, and stack segments. 152 */ 153 154 int 155 netbsd32_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp) 156 { 157 struct netbsd32_exec *execp = epp->ep_hdr; 158 int error; 159 160 epp->ep_taddr = AOUT_LDPGSZ; 161 epp->ep_tsize = execp->a_text; 162 epp->ep_daddr = epp->ep_taddr + execp->a_text; 163 epp->ep_dsize = execp->a_data + execp->a_bss; 164 epp->ep_entry = execp->a_entry; 165 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 166 epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32; 167 168 error = vn_marktext(epp->ep_vp); 169 if (error) 170 return (error); 171 172 /* set up command for text segment */ 173 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 174 epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE); 175 176 /* set up command for data segment */ 177 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 178 epp->ep_daddr, epp->ep_vp, execp->a_text, 179 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 180 181 /* set up command for bss segment */ 182 if (execp->a_bss > 0) 183 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 184 epp->ep_daddr + execp->a_data, NULLVP, 0, 185 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 186 187 return (*epp->ep_esch->es_setup_stack)(l, epp); 188 } 189 190 /* 191 * netbsd32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's 192 * exec package 193 */ 194 195 int 196 netbsd32_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp) 197 { 198 struct netbsd32_exec *execp = epp->ep_hdr; 199 long bsize, baddr; 200 201 epp->ep_taddr = AOUT_LDPGSZ; 202 epp->ep_tsize = execp->a_text; 203 epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, AOUT_LDPGSZ); 204 epp->ep_dsize = execp->a_data + execp->a_bss; 205 epp->ep_entry = execp->a_entry; 206 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 207 epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32; 208 209 /* set up command for text segment */ 210 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 211 epp->ep_taddr, epp->ep_vp, sizeof(struct netbsd32_exec), 212 VM_PROT_READ|VM_PROT_EXECUTE); 213 214 /* set up command for data segment */ 215 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 216 epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct netbsd32_exec), 217 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 218 219 /* set up command for bss segment */ 220 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 221 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 222 if (bsize > 0) 223 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 224 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 225 226 return (*epp->ep_esch->es_setup_stack)(l, epp); 227 } 228 229 /* 230 * netbsd32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's 231 * exec package 232 */ 233 234 int 235 netbsd32_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp) 236 { 237 struct netbsd32_exec *execp = epp->ep_hdr; 238 long dsize, bsize, baddr; 239 240 epp->ep_taddr = AOUT_LDPGSZ; 241 epp->ep_tsize = execp->a_text; 242 epp->ep_daddr = epp->ep_taddr + execp->a_text; 243 epp->ep_dsize = execp->a_data + execp->a_bss; 244 epp->ep_entry = execp->a_entry; 245 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 246 epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32; 247 248 /* set up command for text and data segments */ 249 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 250 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 251 sizeof(struct netbsd32_exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 252 253 /* set up command for bss segment */ 254 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 255 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 256 if (bsize > 0) 257 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 258 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 259 260 /* 261 * Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize); 262 * obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are 263 * computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize' 264 * respectively to page boundaries. 265 * Compensate `ep_dsize' for the amount of data covered by the last 266 * text page. 267 */ 268 dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, 269 PAGE_SIZE); 270 epp->ep_dsize = (dsize > 0) ? dsize : 0; 271 return (*epp->ep_esch->es_setup_stack)(l, epp); 272 } 273
Indexes created Wed Sep 24 05:09:52 GMT 2025