netbsd32_exec_aout.c revision 1.1.2.4
1 1.1.2.4 bouyer /* $NetBSD: netbsd32_exec_aout.c,v 1.1.2.4 2001/02/11 19:14:12 bouyer Exp $ */ 2 1.1.2.2 bouyer /* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */ 3 1.1.2.2 bouyer 4 1.1.2.2 bouyer /* 5 1.1.2.2 bouyer * Copyright (c) 1998 Matthew R. Green. 6 1.1.2.2 bouyer * Copyright (c) 1993, 1994 Christopher G. Demetriou 7 1.1.2.2 bouyer * All rights reserved. 8 1.1.2.2 bouyer * 9 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 10 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 11 1.1.2.2 bouyer * are met: 12 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 13 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 14 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 15 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 16 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 17 1.1.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 18 1.1.2.2 bouyer * must display the following acknowledgement: 19 1.1.2.2 bouyer * This product includes software developed by Christopher G. Demetriou. 20 1.1.2.2 bouyer * 4. The name of the author may not be used to endorse or promote products 21 1.1.2.2 bouyer * derived from this software without specific prior written permission 22 1.1.2.2 bouyer * 23 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 1.1.2.2 bouyer * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 1.1.2.2 bouyer * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 1.1.2.2 bouyer * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 1.1.2.2 bouyer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 1.1.2.2 bouyer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 1.1.2.2 bouyer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 1.1.2.2 bouyer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 1.1.2.2 bouyer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 1.1.2.2 bouyer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 1.1.2.2 bouyer */ 34 1.1.2.2 bouyer 35 1.1.2.2 bouyer #include <sys/param.h> 36 1.1.2.2 bouyer #include <sys/systm.h> 37 1.1.2.2 bouyer #include <sys/proc.h> 38 1.1.2.2 bouyer #include <sys/malloc.h> 39 1.1.2.2 bouyer #include <sys/vnode.h> 40 1.1.2.2 bouyer #include <sys/exec.h> 41 1.1.2.2 bouyer #include <sys/resourcevar.h> 42 1.1.2.2 bouyer #include <sys/signal.h> 43 1.1.2.2 bouyer #include <sys/signalvar.h> 44 1.1.2.2 bouyer 45 1.1.2.2 bouyer #include <compat/netbsd32/netbsd32.h> 46 1.1.2.2 bouyer #ifndef EXEC_AOUT 47 1.1.2.2 bouyer #define EXEC_AOUT 48 1.1.2.2 bouyer #endif 49 1.1.2.2 bouyer #include <compat/netbsd32/netbsd32_exec.h> 50 1.1.2.2 bouyer 51 1.1.2.2 bouyer #include <machine/frame.h> 52 1.1.2.2 bouyer #include <machine/netbsd32_machdep.h> 53 1.1.2.2 bouyer 54 1.1.2.2 bouyer int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *, 55 1.1.2.2 bouyer void *, size_t, const void *, const void *)); 56 1.1.2.2 bouyer 57 1.1.2.3 bouyer int netbsd32_exec_aout_setup_stack __P((struct proc *p, 58 1.1.2.3 bouyer struct exec_package *epp)); 59 1.1.2.2 bouyer 60 1.1.2.2 bouyer /* 61 1.1.2.2 bouyer * exec_netbsd32_makecmds(): Check if it's an netbsd32 a.out format 62 1.1.2.2 bouyer * executable. 63 1.1.2.2 bouyer * 64 1.1.2.2 bouyer * Given a proc pointer and an exec package pointer, see if the referent 65 1.1.2.2 bouyer * of the epp is in netbsd32 a.out format. Check 'standard' magic 66 1.1.2.2 bouyer * numbers for this architecture. 67 1.1.2.2 bouyer * 68 1.1.2.2 bouyer * This function, in the former case, or the hook, in the latter, is 69 1.1.2.2 bouyer * responsible for creating a set of vmcmds which can be used to build 70 1.1.2.2 bouyer * the process's vm space and inserting them into the exec package. 71 1.1.2.2 bouyer */ 72 1.1.2.2 bouyer 73 1.1.2.2 bouyer int 74 1.1.2.2 bouyer exec_netbsd32_makecmds(p, epp) 75 1.1.2.2 bouyer struct proc *p; 76 1.1.2.2 bouyer struct exec_package *epp; 77 1.1.2.2 bouyer { 78 1.1.2.2 bouyer netbsd32_u_long midmag, magic; 79 1.1.2.2 bouyer u_short mid; 80 1.1.2.2 bouyer int error; 81 1.1.2.2 bouyer struct netbsd32_exec *execp = epp->ep_hdr; 82 1.1.2.2 bouyer 83 1.1.2.2 bouyer if (epp->ep_hdrvalid < sizeof(struct netbsd32_exec)) 84 1.1.2.2 bouyer return ENOEXEC; 85 1.1.2.2 bouyer 86 1.1.2.2 bouyer midmag = (netbsd32_u_long)ntohl(execp->a_midmag); 87 1.1.2.2 bouyer mid = (midmag >> 16) & 0x3ff; 88 1.1.2.2 bouyer magic = midmag & 0xffff; 89 1.1.2.2 bouyer 90 1.1.2.2 bouyer midmag = mid << 16 | magic; 91 1.1.2.2 bouyer 92 1.1.2.2 bouyer switch (midmag) { 93 1.1.2.2 bouyer case (MID_SPARC << 16) | ZMAGIC: 94 1.1.2.2 bouyer error = netbsd32_exec_aout_prep_zmagic(p, epp); 95 1.1.2.2 bouyer break; 96 1.1.2.2 bouyer case (MID_SPARC << 16) | NMAGIC: 97 1.1.2.2 bouyer error = netbsd32_exec_aout_prep_nmagic(p, epp); 98 1.1.2.2 bouyer break; 99 1.1.2.2 bouyer case (MID_SPARC << 16) | OMAGIC: 100 1.1.2.2 bouyer error = netbsd32_exec_aout_prep_omagic(p, epp); 101 1.1.2.2 bouyer break; 102 1.1.2.2 bouyer default: 103 1.1.2.2 bouyer /* Invalid magic */ 104 1.1.2.2 bouyer error = ENOEXEC; 105 1.1.2.2 bouyer break; 106 1.1.2.2 bouyer } 107 1.1.2.2 bouyer 108 1.1.2.2 bouyer if (error == 0) { 109 1.1.2.2 bouyer /* set up our emulation information */ 110 1.1.2.2 bouyer epp->ep_flags |= EXEC_32; 111 1.1.2.2 bouyer } else 112 1.1.2.2 bouyer kill_vmcmds(&epp->ep_vmcmds); 113 1.1.2.2 bouyer 114 1.1.2.2 bouyer return error; 115 1.1.2.2 bouyer } 116 1.1.2.2 bouyer 117 1.1.2.2 bouyer /* 118 1.1.2.2 bouyer * netbsd32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's 119 1.1.2.2 bouyer * exec package 120 1.1.2.2 bouyer * 121 1.1.2.2 bouyer * First, set of the various offsets/lengths in the exec package. 122 1.1.2.2 bouyer * 123 1.1.2.2 bouyer * Then, mark the text image busy (so it can be demand paged) or error 124 1.1.2.2 bouyer * out if this is not possible. Finally, set up vmcmds for the 125 1.1.2.2 bouyer * text, data, bss, and stack segments. 126 1.1.2.2 bouyer */ 127 1.1.2.2 bouyer 128 1.1.2.2 bouyer int 129 1.1.2.2 bouyer netbsd32_exec_aout_prep_zmagic(p, epp) 130 1.1.2.2 bouyer struct proc *p; 131 1.1.2.2 bouyer struct exec_package *epp; 132 1.1.2.2 bouyer { 133 1.1.2.2 bouyer struct netbsd32_exec *execp = epp->ep_hdr; 134 1.1.2.2 bouyer 135 1.1.2.2 bouyer epp->ep_taddr = USRTEXT; 136 1.1.2.2 bouyer epp->ep_tsize = execp->a_text; 137 1.1.2.2 bouyer epp->ep_daddr = epp->ep_taddr + execp->a_text; 138 1.1.2.2 bouyer epp->ep_dsize = execp->a_data + execp->a_bss; 139 1.1.2.2 bouyer epp->ep_entry = execp->a_entry; 140 1.1.2.2 bouyer 141 1.1.2.2 bouyer /* 142 1.1.2.2 bouyer * check if vnode is in open for writing, because we want to 143 1.1.2.2 bouyer * demand-page out of it. if it is, don't do it, for various 144 1.1.2.2 bouyer * reasons 145 1.1.2.2 bouyer */ 146 1.1.2.2 bouyer if ((execp->a_text != 0 || execp->a_data != 0) && 147 1.1.2.2 bouyer epp->ep_vp->v_writecount != 0) { 148 1.1.2.2 bouyer #ifdef DIAGNOSTIC 149 1.1.2.2 bouyer if (epp->ep_vp->v_flag & VTEXT) 150 1.1.2.2 bouyer panic("exec: a VTEXT vnode has writecount != 0\n"); 151 1.1.2.2 bouyer #endif 152 1.1.2.2 bouyer return ETXTBSY; 153 1.1.2.2 bouyer } 154 1.1.2.2 bouyer vn_marktext(epp->ep_vp); 155 1.1.2.2 bouyer 156 1.1.2.2 bouyer /* set up command for text segment */ 157 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 158 1.1.2.2 bouyer epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE); 159 1.1.2.2 bouyer 160 1.1.2.2 bouyer /* set up command for data segment */ 161 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 162 1.1.2.2 bouyer epp->ep_daddr, epp->ep_vp, execp->a_text, 163 1.1.2.2 bouyer VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 164 1.1.2.2 bouyer 165 1.1.2.2 bouyer /* set up command for bss segment */ 166 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 167 1.1.2.2 bouyer epp->ep_daddr + execp->a_data, NULLVP, 0, 168 1.1.2.2 bouyer VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 169 1.1.2.2 bouyer 170 1.1.2.3 bouyer return netbsd32_exec_aout_setup_stack(p, epp); 171 1.1.2.2 bouyer } 172 1.1.2.2 bouyer 173 1.1.2.2 bouyer /* 174 1.1.2.2 bouyer * netbsd32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's 175 1.1.2.2 bouyer * exec package 176 1.1.2.2 bouyer */ 177 1.1.2.2 bouyer 178 1.1.2.2 bouyer int 179 1.1.2.2 bouyer netbsd32_exec_aout_prep_nmagic(p, epp) 180 1.1.2.2 bouyer struct proc *p; 181 1.1.2.2 bouyer struct exec_package *epp; 182 1.1.2.2 bouyer { 183 1.1.2.2 bouyer struct netbsd32_exec *execp = epp->ep_hdr; 184 1.1.2.2 bouyer long bsize, baddr; 185 1.1.2.2 bouyer 186 1.1.2.2 bouyer epp->ep_taddr = USRTEXT; 187 1.1.2.2 bouyer epp->ep_tsize = execp->a_text; 188 1.1.2.2 bouyer epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, __LDPGSZ); 189 1.1.2.2 bouyer epp->ep_dsize = execp->a_data + execp->a_bss; 190 1.1.2.2 bouyer epp->ep_entry = execp->a_entry; 191 1.1.2.2 bouyer 192 1.1.2.2 bouyer /* set up command for text segment */ 193 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 194 1.1.2.4 bouyer epp->ep_taddr, epp->ep_vp, sizeof(struct netbsd32_exec), 195 1.1.2.2 bouyer VM_PROT_READ|VM_PROT_EXECUTE); 196 1.1.2.2 bouyer 197 1.1.2.2 bouyer /* set up command for data segment */ 198 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 199 1.1.2.4 bouyer epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct netbsd32_exec), 200 1.1.2.2 bouyer VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 201 1.1.2.2 bouyer 202 1.1.2.2 bouyer /* set up command for bss segment */ 203 1.1.2.2 bouyer baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 204 1.1.2.2 bouyer bsize = epp->ep_daddr + epp->ep_dsize - baddr; 205 1.1.2.2 bouyer if (bsize > 0) 206 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 207 1.1.2.2 bouyer NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 208 1.1.2.2 bouyer 209 1.1.2.3 bouyer return netbsd32_exec_aout_setup_stack(p, epp); 210 1.1.2.2 bouyer } 211 1.1.2.2 bouyer 212 1.1.2.2 bouyer /* 213 1.1.2.2 bouyer * netbsd32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's 214 1.1.2.2 bouyer * exec package 215 1.1.2.2 bouyer */ 216 1.1.2.2 bouyer 217 1.1.2.2 bouyer int 218 1.1.2.2 bouyer netbsd32_exec_aout_prep_omagic(p, epp) 219 1.1.2.2 bouyer struct proc *p; 220 1.1.2.2 bouyer struct exec_package *epp; 221 1.1.2.2 bouyer { 222 1.1.2.2 bouyer struct netbsd32_exec *execp = epp->ep_hdr; 223 1.1.2.2 bouyer long dsize, bsize, baddr; 224 1.1.2.2 bouyer 225 1.1.2.2 bouyer epp->ep_taddr = USRTEXT; 226 1.1.2.2 bouyer epp->ep_tsize = execp->a_text; 227 1.1.2.2 bouyer epp->ep_daddr = epp->ep_taddr + execp->a_text; 228 1.1.2.2 bouyer epp->ep_dsize = execp->a_data + execp->a_bss; 229 1.1.2.2 bouyer epp->ep_entry = execp->a_entry; 230 1.1.2.2 bouyer 231 1.1.2.2 bouyer /* set up command for text and data segments */ 232 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 233 1.1.2.2 bouyer execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 234 1.1.2.4 bouyer sizeof(struct netbsd32_exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 235 1.1.2.2 bouyer 236 1.1.2.2 bouyer /* set up command for bss segment */ 237 1.1.2.2 bouyer baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 238 1.1.2.2 bouyer bsize = epp->ep_daddr + epp->ep_dsize - baddr; 239 1.1.2.2 bouyer if (bsize > 0) 240 1.1.2.2 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 241 1.1.2.2 bouyer NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 242 1.1.2.2 bouyer 243 1.1.2.2 bouyer /* 244 1.1.2.2 bouyer * Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize); 245 1.1.2.2 bouyer * obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are 246 1.1.2.2 bouyer * computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize' 247 1.1.2.2 bouyer * respectively to page boundaries. 248 1.1.2.2 bouyer * Compensate `ep_dsize' for the amount of data covered by the last 249 1.1.2.2 bouyer * text page. 250 1.1.2.2 bouyer */ 251 1.1.2.2 bouyer dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, NBPG); 252 1.1.2.2 bouyer epp->ep_dsize = (dsize > 0) ? dsize : 0; 253 1.1.2.3 bouyer return netbsd32_exec_aout_setup_stack(p, epp); 254 1.1.2.3 bouyer } 255 1.1.2.3 bouyer 256 1.1.2.3 bouyer /* 257 1.1.2.3 bouyer * netbsd32_exec_aout_setup_stack(): Set up the stack segment for an a.out 258 1.1.2.3 bouyer * executable. 259 1.1.2.3 bouyer * 260 1.1.2.3 bouyer * Note that the ep_ssize parameter must be set to be the current stack 261 1.1.2.3 bouyer * limit; this is adjusted in the body of execve() to yield the 262 1.1.2.3 bouyer * appropriate stack segment usage once the argument length is 263 1.1.2.3 bouyer * calculated. 264 1.1.2.3 bouyer * 265 1.1.2.3 bouyer * This function returns an int for uniformity with other (future) formats' 266 1.1.2.3 bouyer * stack setup functions. They might have errors to return. 267 1.1.2.3 bouyer */ 268 1.1.2.3 bouyer int 269 1.1.2.3 bouyer netbsd32_exec_aout_setup_stack(struct proc *p, struct exec_package *epp) 270 1.1.2.3 bouyer { 271 1.1.2.3 bouyer 272 1.1.2.3 bouyer epp->ep_maxsaddr = USRSTACK32 - MAXSSIZ; 273 1.1.2.3 bouyer epp->ep_minsaddr = USRSTACK32; 274 1.1.2.3 bouyer epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur; 275 1.1.2.3 bouyer 276 1.1.2.3 bouyer /* 277 1.1.2.3 bouyer * set up commands for stack. note that this takes *two*, one to 278 1.1.2.3 bouyer * map the part of the stack which we can access, and one to map 279 1.1.2.3 bouyer * the part which we can't. 280 1.1.2.3 bouyer * 281 1.1.2.3 bouyer * arguably, it could be made into one, but that would require the 282 1.1.2.3 bouyer * addition of another mapping proc, which is unnecessary 283 1.1.2.3 bouyer * 284 1.1.2.3 bouyer * note that in memory, things assumed to be: 0 ... ep_maxsaddr 285 1.1.2.3 bouyer * <stack> ep_minsaddr 286 1.1.2.3 bouyer */ 287 1.1.2.3 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, 288 1.1.2.3 bouyer ((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr), 289 1.1.2.3 bouyer epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE); 290 1.1.2.3 bouyer NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize, 291 1.1.2.3 bouyer (epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0, 292 1.1.2.3 bouyer VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 293 1.1.2.3 bouyer 294 1.1.2.3 bouyer return 0; 295 1.1.2.2 bouyer } 296
Indexes created Wed Sep 24 14:09:57 GMT 2025