sunos_exec.c revision 1.2
1/* 2 * Copyright (c) 1993 Theo de Raadt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software withough specific prior written permission 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $Id: sunos_exec.c,v 1.2 1993/12/12 20:43:18 deraadt Exp $ 28 */ 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/filedesc.h> 33#include <sys/kernel.h> 34#include <sys/proc.h> 35#include <sys/mount.h> 36#include <sys/malloc.h> 37#include <sys/namei.h> 38#include <sys/vnode.h> 39#include <sys/file.h> 40#include <sys/exec.h> 41#include <sys/resourcevar.h> 42#include <sys/wait.h> 43 44#include <sys/mman.h> 45#include <vm/vm.h> 46#include <vm/vm_param.h> 47#include <vm/vm_map.h> 48#include <vm/vm_kern.h> 49#include <vm/vm_pager.h> 50 51#include <machine/cpu.h> 52#include <machine/reg.h> 53#include <machine/exec.h> 54 55#include <compat/sunos/exec.h> 56 57#ifdef sparc 58#define sun_exec_aout_prep_zmagic exec_aout_prep_zmagic 59#define sun_exec_aout_prep_nmagic exec_aout_prep_nmagic 60#define sun_exec_aout_prep_omagic exec_aout_prep_omagic 61#endif 62 63int 64sun_exec_aout_makecmds(p, epp) 65 struct proc *p; 66 struct exec_package *epp; 67{ 68 struct sun_exec *sunmag; 69 int error = ENOEXEC; 70 71 sunmag = (struct sun_exec *)epp->ep_execp; 72 if(sunmag->a_machtype != SUN_M_NATIVE) 73 return (ENOEXEC); 74 75 switch (sunmag->a_magic) { 76 case ZMAGIC: 77 error = sun_exec_aout_prep_zmagic(p, epp); 78 break; 79 case NMAGIC: 80 error = sun_exec_aout_prep_nmagic(p, epp); 81 break; 82 case OMAGIC: 83 error = sun_exec_aout_prep_omagic(p, epp); 84 break; 85 } 86 if (error==0) 87 epp->ep_emul = EMUL_SUNOS; 88 return error; 89} 90 91/* 92 * the code below is only needed for sun3 emulation. 93 */ 94#ifndef sparc 95 96/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 97#define SEGSIZ 0x20000 98#define N_TXTADDR(x,m) __LDPGSZ 99#define N_DATADDR(x,m) (((m)==OMAGIC) ? (N_TXTADDR(x,m) + (x).a_text) \ 100 : (SEGSIZ + ((N_TXTADDR(x,m) + (x).a_text - 1) \ 101 & ~(SEGSIZ-1)))) 102#define N_BSSADDR(x,m) (N_DATADDR(x,m)+(x).a_data) 103 104#define N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 105#define N_DATOFF(x,m) (N_TXTOFF(x,m) + (x).a_text) 106 107/* 108 * sun_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 109 * 110 * First, set of the various offsets/lengths in the exec package. 111 * 112 * Then, mark the text image busy (so it can be demand paged) or error 113 * out if this is not possible. Finally, set up vmcmds for the 114 * text, data, bss, and stack segments. 115 */ 116int 117sun_exec_aout_prep_zmagic(p, epp) 118 struct proc *p; 119 struct exec_package *epp; 120{ 121 struct exec *execp = epp->ep_execp; 122 struct exec_vmcmd *ccmdp; 123 124 epp->ep_taddr = N_TXTADDR(*execp, ZMAGIC); 125 epp->ep_tsize = execp->a_text; 126 epp->ep_daddr = N_DATADDR(*execp, ZMAGIC); 127 epp->ep_dsize = execp->a_data + execp->a_bss; 128 epp->ep_entry = execp->a_entry; 129 130 /* 131 * check if vnode is in open for writing, because we want to 132 * demand-page out of it. if it is, don't do it, for various 133 * reasons 134 */ 135 if ((execp->a_text != 0 || execp->a_data != 0) && 136 (epp->ep_vp->v_flag & VTEXT) == 0 && epp->ep_vp->v_writecount != 0) { 137#ifdef DIAGNOSTIC 138 if (epp->ep_vp->v_flag & VTEXT) 139 panic("exec: a VTEXT vnode has writecount != 0\n"); 140#endif 141 epp->ep_vcp = NULL; 142 return ETXTBSY; 143 } 144 epp->ep_vp->v_flag |= VTEXT; 145 146 /* set up command for text segment */ 147 epp->ep_vcp = new_vmcmd(vmcmd_map_pagedvn, 148 execp->a_text, 149 epp->ep_taddr, 150 epp->ep_vp, 151 N_TXTOFF(*execp, ZMAGIC), 152 VM_PROT_READ | VM_PROT_EXECUTE); 153 ccmdp = epp->ep_vcp; 154 155 /* set up command for data segment */ 156 ccmdp->ev_next = new_vmcmd(vmcmd_map_pagedvn, 157 execp->a_data, 158 epp->ep_daddr, 159 epp->ep_vp, 160 N_DATOFF(*execp, ZMAGIC), 161 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE); 162 ccmdp = ccmdp->ev_next; 163 164 /* set up command for bss segment */ 165 ccmdp->ev_next = new_vmcmd(vmcmd_map_zero, 166 execp->a_bss, 167 epp->ep_daddr + execp->a_data, 168 0, 169 0, 170 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE); 171 ccmdp = ccmdp->ev_next; 172 173 return exec_aout_setup_stack(p, epp, ccmdp); 174} 175 176/* 177 * sun_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 178 */ 179int 180sun_exec_aout_prep_nmagic(p, epp) 181 struct proc *p; 182 struct exec_package *epp; 183{ 184 struct exec *execp = epp->ep_execp; 185 struct exec_vmcmd *ccmdp; 186 long bsize, baddr; 187 188 epp->ep_taddr = N_TXTADDR(*execp, NMAGIC); 189 epp->ep_tsize = execp->a_text; 190 epp->ep_daddr = N_DATADDR(*execp, NMAGIC); 191 epp->ep_dsize = execp->a_data + execp->a_bss; 192 epp->ep_entry = execp->a_entry; 193 194 /* set up command for text segment */ 195 epp->ep_vcp = new_vmcmd(vmcmd_map_readvn, 196 execp->a_text, 197 epp->ep_taddr, 198 epp->ep_vp, 199 N_TXTOFF(*execp, NMAGIC), 200 VM_PROT_READ | VM_PROT_EXECUTE); 201 ccmdp = epp->ep_vcp; 202 203 /* set up command for data segment */ 204 ccmdp->ev_next = new_vmcmd(vmcmd_map_readvn, 205 execp->a_data, 206 epp->ep_daddr, 207 epp->ep_vp, 208 N_DATOFF(*execp, NMAGIC), 209 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE); 210 ccmdp = ccmdp->ev_next; 211 212 /* set up command for bss segment */ 213 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 214 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 215 if (bsize > 0) { 216 ccmdp->ev_next = new_vmcmd(vmcmd_map_zero, bsize, baddr, 217 0, 0, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE); 218 ccmdp = ccmdp->ev_next; 219 } 220 221 return exec_aout_setup_stack(p, epp, ccmdp); 222} 223 224/* 225 * sun_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 226 */ 227int 228sun_exec_aout_prep_omagic(p, epp) 229 struct proc *p; 230 struct exec_package *epp; 231{ 232 struct exec *execp = epp->ep_execp; 233 struct exec_vmcmd *ccmdp; 234 long bsize, baddr; 235 236 epp->ep_taddr = N_TXTADDR(*execp, OMAGIC); 237 epp->ep_tsize = execp->a_text; 238 epp->ep_daddr = N_DATADDR(*execp, OMAGIC); 239 epp->ep_dsize = execp->a_data + execp->a_bss; 240 epp->ep_entry = execp->a_entry; 241 242 /* set up command for text and data segments */ 243 epp->ep_vcp = new_vmcmd(vmcmd_map_readvn, 244 execp->a_text + execp->a_data, 245 epp->ep_taddr, 246 epp->ep_vp, 247 N_TXTOFF(*execp, OMAGIC), 248 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE); 249 ccmdp = epp->ep_vcp; 250 251 /* set up command for bss segment */ 252 baddr = roundup(epp->ep_daddr + execp->a_data, __LDPGSZ); 253 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 254 if (bsize > 0) { 255 ccmdp->ev_next = new_vmcmd(vmcmd_map_zero, bsize, baddr, 256 0, 0, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE); 257 ccmdp = ccmdp->ev_next; 258 } 259 260 return exec_aout_setup_stack(p, epp, ccmdp); 261} 262#endif /* !sparc */ 263