netbsd32_exec_aout.c revision 1.19
1 /* $NetBSD: netbsd32_exec_aout.c,v 1.19 2004/02/20 17:04:27 drochner 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 1.19 2004/02/20 17:04:27 drochner 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 __P((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 proc 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(p, epp) 102 struct proc *p; 103 struct exec_package *epp; 104 { 105 netbsd32_u_long midmag, magic; 106 u_short mid; 107 int error; 108 struct netbsd32_exec *execp = epp->ep_hdr; 109 110 if (epp->ep_hdrvalid < sizeof(struct netbsd32_exec)) 111 return ENOEXEC; 112 113 midmag = (netbsd32_u_long)ntohl(execp->a_midmag); 114 mid = (midmag >> 16) & 0x3ff; 115 magic = midmag & 0xffff; 116 117 midmag = mid << 16 | magic; 118 119 /* this is already needed by setup_stack() */ 120 epp->ep_flags |= EXEC_32; 121 122 switch (midmag) { 123 case (NETBSD32_MID_MACHINE << 16) | ZMAGIC: 124 error = netbsd32_exec_aout_prep_zmagic(p, epp); 125 break; 126 case (NETBSD32_MID_MACHINE << 16) | NMAGIC: 127 error = netbsd32_exec_aout_prep_nmagic(p, epp); 128 break; 129 case (NETBSD32_MID_MACHINE << 16) | OMAGIC: 130 error = netbsd32_exec_aout_prep_omagic(p, epp); 131 break; 132 default: 133 /* Invalid magic */ 134 error = ENOEXEC; 135 break; 136 } 137 138 if (error) { 139 kill_vmcmds(&epp->ep_vmcmds); 140 epp->ep_flags &= ~EXEC_32; 141 } 142 return error; 143 } 144 145 /* 146 * netbsd32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's 147 * exec package 148 * 149 * First, set of the various offsets/lengths in the exec package. 150 * 151 * Then, mark the text image busy (so it can be demand paged) or error 152 * out if this is not possible. Finally, set up vmcmds for the 153 * text, data, bss, and stack segments. 154 */ 155 156 int 157 netbsd32_exec_aout_prep_zmagic(p, epp) 158 struct proc *p; 159 struct exec_package *epp; 160 { 161 struct netbsd32_exec *execp = epp->ep_hdr; 162 int error; 163 164 epp->ep_taddr = AOUT_LDPGSZ; 165 epp->ep_tsize = execp->a_text; 166 epp->ep_daddr = epp->ep_taddr + execp->a_text; 167 epp->ep_dsize = execp->a_data + execp->a_bss; 168 epp->ep_entry = execp->a_entry; 169 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 170 epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32; 171 172 error = vn_marktext(epp->ep_vp); 173 if (error) 174 return (error); 175 176 /* set up command for text segment */ 177 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 178 epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE); 179 180 /* set up command for data segment */ 181 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 182 epp->ep_daddr, epp->ep_vp, execp->a_text, 183 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 184 185 /* set up command for bss segment */ 186 if (execp->a_bss > 0) 187 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 188 epp->ep_daddr + execp->a_data, NULLVP, 0, 189 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 190 191 return (*epp->ep_esch->es_setup_stack)(p, epp); 192 } 193 194 /* 195 * netbsd32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's 196 * exec package 197 */ 198 199 int 200 netbsd32_exec_aout_prep_nmagic(p, epp) 201 struct proc *p; 202 struct exec_package *epp; 203 { 204 struct netbsd32_exec *execp = epp->ep_hdr; 205 long bsize, baddr; 206 207 epp->ep_taddr = AOUT_LDPGSZ; 208 epp->ep_tsize = execp->a_text; 209 epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, AOUT_LDPGSZ); 210 epp->ep_dsize = execp->a_data + execp->a_bss; 211 epp->ep_entry = execp->a_entry; 212 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 213 epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32; 214 215 /* set up command for text segment */ 216 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 217 epp->ep_taddr, epp->ep_vp, sizeof(struct netbsd32_exec), 218 VM_PROT_READ|VM_PROT_EXECUTE); 219 220 /* set up command for data segment */ 221 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 222 epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct netbsd32_exec), 223 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 224 225 /* set up command for bss segment */ 226 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 227 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 228 if (bsize > 0) 229 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 230 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 231 232 return (*epp->ep_esch->es_setup_stack)(p, epp); 233 } 234 235 /* 236 * netbsd32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's 237 * exec package 238 */ 239 240 int 241 netbsd32_exec_aout_prep_omagic(p, epp) 242 struct proc *p; 243 struct exec_package *epp; 244 { 245 struct netbsd32_exec *execp = epp->ep_hdr; 246 long dsize, bsize, baddr; 247 248 epp->ep_taddr = AOUT_LDPGSZ; 249 epp->ep_tsize = execp->a_text; 250 epp->ep_daddr = epp->ep_taddr + execp->a_text; 251 epp->ep_dsize = execp->a_data + execp->a_bss; 252 epp->ep_entry = execp->a_entry; 253 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 254 epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32; 255 256 /* set up command for text and data segments */ 257 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 258 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 259 sizeof(struct netbsd32_exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 260 261 /* set up command for bss segment */ 262 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 263 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 264 if (bsize > 0) 265 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 266 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 267 268 /* 269 * Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize); 270 * obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are 271 * computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize' 272 * respectively to page boundaries. 273 * Compensate `ep_dsize' for the amount of data covered by the last 274 * text page. 275 */ 276 dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, 277 PAGE_SIZE); 278 epp->ep_dsize = (dsize > 0) ? dsize : 0; 279 return (*epp->ep_esch->es_setup_stack)(p, epp); 280 } 281
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