sunos_exec.c revision 1.3
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 1.3 1994/01/28 03:41:44 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 = epp->ep_hdr; 69 int error = ENOEXEC; 70 71 if(sunmag->a_machtype != SUN_M_NATIVE) 72 return (ENOEXEC); 73 74 switch (sunmag->a_magic) { 75 case ZMAGIC: 76 error = sun_exec_aout_prep_zmagic(p, epp); 77 break; 78 case NMAGIC: 79 error = sun_exec_aout_prep_nmagic(p, epp); 80 break; 81 case OMAGIC: 82 error = sun_exec_aout_prep_omagic(p, epp); 83 break; 84 } 85 if (error==0) 86 epp->ep_emul = EMUL_SUNOS; 87 return error; 88} 89 90/* 91 * the code below is only needed for sun3 emulation. 92 */ 93#ifndef sparc 94 95/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 96#define SEGSIZ 0x20000 97#define N_TXTADDR(x,m) __LDPGSZ 98#define N_DATADDR(x,m) (((m)==OMAGIC) ? (N_TXTADDR(x,m) + (x).a_text) \ 99 : (SEGSIZ + ((N_TXTADDR(x,m) + (x).a_text - 1) \ 100 & ~(SEGSIZ-1)))) 101#define N_BSSADDR(x,m) (N_DATADDR(x,m)+(x).a_data) 102 103#define N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 104#define N_DATOFF(x,m) (N_TXTOFF(x,m) + (x).a_text) 105 106/* 107 * sun_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 108 * 109 * First, set of the various offsets/lengths in the exec package. 110 * 111 * Then, mark the text image busy (so it can be demand paged) or error 112 * out if this is not possible. Finally, set up vmcmds for the 113 * text, data, bss, and stack segments. 114 */ 115int 116sun_exec_aout_prep_zmagic(p, epp) 117 struct proc *p; 118 struct exec_package *epp; 119{ 120 struct exec *execp = epp->ep_hdr; 121 struct exec_vmcmd *ccmdp; 122 123 epp->ep_taddr = N_TXTADDR(*execp, ZMAGIC); 124 epp->ep_tsize = execp->a_text; 125 epp->ep_daddr = N_DATADDR(*execp, ZMAGIC); 126 epp->ep_dsize = execp->a_data + execp->a_bss; 127 epp->ep_entry = execp->a_entry; 128 129 /* 130 * check if vnode is in open for writing, because we want to 131 * demand-page out of it. if it is, don't do it, for various 132 * reasons 133 */ 134 if ((execp->a_text != 0 || execp->a_data != 0) && 135 epp->ep_vp->v_writecount != 0) { 136#ifdef DIAGNOSTIC 137 if (epp->ep_vp->v_flag & VTEXT) 138 panic("exec: a VTEXT vnode has writecount != 0\n"); 139#endif 140 return ETXTBSY; 141 } 142 epp->ep_vp->v_flag |= VTEXT; 143 144 /* set up command for text segment */ 145 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 146 epp->ep_taddr, epp->ep_vp, N_TXTOFF(*execp, ZMAGIC), 147 VM_PROT_READ|VM_PROT_EXECUTE); 148 149 /* set up command for data segment */ 150 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 151 epp->ep_daddr, epp->ep_vp, N_DATOFF(*execp, ZMAGIC), 152 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 153 154 /* set up command for bss segment */ 155 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 156 epp->ep_daddr + execp->a_data, NULLVP, 0, 157 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 158 159 return exec_aout_setup_stack(p, epp); 160} 161 162/* 163 * sun_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 164 */ 165int 166sun_exec_aout_prep_nmagic(p, epp) 167 struct proc *p; 168 struct exec_package *epp; 169{ 170 struct exec *execp = epp->ep_hdr; 171 struct exec_vmcmd *ccmdp; 172 long bsize, baddr; 173 174 epp->ep_taddr = N_TXTADDR(*execp, NMAGIC); 175 epp->ep_tsize = execp->a_text; 176 epp->ep_daddr = N_DATADDR(*execp, NMAGIC); 177 epp->ep_dsize = execp->a_data + execp->a_bss; 178 epp->ep_entry = execp->a_entry; 179 180 /* set up command for text segment */ 181 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 182 epp->ep_taddr, epp->ep_vp, N_TXTOFF(*execp, NMAGIC), 183 VM_PROT_READ|VM_PROT_EXECUTE); 184 185 /* set up command for data segment */ 186 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 187 epp->ep_daddr, epp->ep_vp, N_DATOFF(*execp, NMAGIC), 188 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 189 190 /* set up command for bss segment */ 191 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 192 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 193 if (bsize > 0) 194 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 195 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 196 197 return exec_aout_setup_stack(p, epp); 198} 199 200/* 201 * sun_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 202 */ 203int 204sun_exec_aout_prep_omagic(p, epp) 205 struct proc *p; 206 struct exec_package *epp; 207{ 208 struct exec *execp = epp->ep_hdr; 209 struct exec_vmcmd *ccmdp; 210 long bsize, baddr; 211 212 epp->ep_taddr = N_TXTADDR(*execp, OMAGIC); 213 epp->ep_tsize = execp->a_text; 214 epp->ep_daddr = N_DATADDR(*execp, OMAGIC); 215 epp->ep_dsize = execp->a_data + execp->a_bss; 216 epp->ep_entry = execp->a_entry; 217 218 /* set up command for text and data segments */ 219 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 220 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 221 N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 222 223 /* set up command for bss segment */ 224 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 225 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 226 if (bsize > 0) 227 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 228 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 229 230 return exec_aout_setup_stack(p, epp); 231} 232#endif /* !sparc */ 233