sunos_exec.c revision 1.13
1/* $NetBSD: sunos_exec.c,v 1.13 1997/12/04 15:34:00 tv Exp $ */ 2 3/* 4 * Copyright (c) 1993 Theo de Raadt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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/signalvar.h> 39#include <sys/vnode.h> 40#include <sys/file.h> 41#include <sys/exec.h> 42#include <sys/resourcevar.h> 43#include <sys/wait.h> 44 45#include <sys/mman.h> 46#include <vm/vm.h> 47#include <vm/vm_param.h> 48#include <vm/vm_map.h> 49#include <vm/vm_kern.h> 50#include <vm/vm_pager.h> 51 52#include <machine/cpu.h> 53#include <machine/reg.h> 54 55#include <compat/sunos/sunos.h> 56#include <compat/sunos/sunos_exec.h> 57#include <compat/sunos/sunos_syscall.h> 58 59#ifdef sparc 60#define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 61#define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 62#define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 63#endif 64 65int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 66int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 67int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 68 69extern int nsunos_sysent; 70extern struct sysent sunos_sysent[]; 71#ifdef SYSCALL_DEBUG 72extern char *sunos_syscallnames[]; 73#endif 74extern char sigcode[], esigcode[]; 75const char sunos_emul_path[] = "/emul/sunos"; 76 77struct emul emul_sunos = { 78 "sunos", 79 NULL, 80#ifdef sparc 81 sendsig, 82#else 83 sunos_sendsig, 84#endif 85 SUNOS_SYS_syscall, 86 SUNOS_SYS_MAXSYSCALL, 87 sunos_sysent, 88#ifdef SYSCALL_DEBUG 89 sunos_syscallnames, 90#else 91 NULL, 92#endif 93 0, 94 copyargs, 95 setregs, 96 sigcode, 97 esigcode, 98}; 99 100int 101exec_sunos_aout_makecmds(p, epp) 102 struct proc *p; 103 struct exec_package *epp; 104{ 105 struct sunos_exec *sunmag = epp->ep_hdr; 106 int error = ENOEXEC; 107 108 if(sunmag->a_machtype != SUNOS_M_NATIVE) 109 return (ENOEXEC); 110 111 switch (sunmag->a_magic) { 112 case ZMAGIC: 113 error = sunos_exec_aout_prep_zmagic(p, epp); 114 break; 115 case NMAGIC: 116 error = sunos_exec_aout_prep_nmagic(p, epp); 117 break; 118 case OMAGIC: 119 error = sunos_exec_aout_prep_omagic(p, epp); 120 break; 121 } 122 if (error==0) 123 epp->ep_emul = &emul_sunos; 124 return error; 125} 126 127/* 128 * the code below is only needed for sun3 emulation. 129 */ 130#ifndef sparc 131 132/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 133#define SEGSIZ 0x20000 134#define SUNOS_N_TXTADDR(x,m) __LDPGSZ 135#define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 136 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 137 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 138#define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 139 140#define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 141#define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 142 143/* 144 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 145 * 146 * First, set of the various offsets/lengths in the exec package. 147 * 148 * Then, mark the text image busy (so it can be demand paged) or error 149 * out if this is not possible. Finally, set up vmcmds for the 150 * text, data, bss, and stack segments. 151 */ 152int 153sunos_exec_aout_prep_zmagic(p, epp) 154 struct proc *p; 155 struct exec_package *epp; 156{ 157 struct exec *execp = epp->ep_hdr; 158 159 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 160 epp->ep_tsize = execp->a_text; 161 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 162 epp->ep_dsize = execp->a_data + execp->a_bss; 163 epp->ep_entry = execp->a_entry; 164 165 /* 166 * check if vnode is in open for writing, because we want to 167 * demand-page out of it. if it is, don't do it, for various 168 * reasons 169 */ 170 if ((execp->a_text != 0 || execp->a_data != 0) && 171 epp->ep_vp->v_writecount != 0) { 172#ifdef DIAGNOSTIC 173 if (epp->ep_vp->v_flag & VTEXT) 174 panic("exec: a VTEXT vnode has writecount != 0\n"); 175#endif 176 return ETXTBSY; 177 } 178 epp->ep_vp->v_flag |= VTEXT; 179 180 /* set up command for text segment */ 181 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 182 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 183 VM_PROT_READ|VM_PROT_EXECUTE); 184 185 /* set up command for data segment */ 186 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 187 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 188 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 189 190 /* set up command for bss segment */ 191 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 192 epp->ep_daddr + execp->a_data, NULLVP, 0, 193 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 194 195 return exec_aout_setup_stack(p, epp); 196} 197 198/* 199 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 200 */ 201int 202sunos_exec_aout_prep_nmagic(p, epp) 203 struct proc *p; 204 struct exec_package *epp; 205{ 206 struct exec *execp = epp->ep_hdr; 207 long bsize, baddr; 208 209 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 210 epp->ep_tsize = execp->a_text; 211 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 212 epp->ep_dsize = execp->a_data + execp->a_bss; 213 epp->ep_entry = execp->a_entry; 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, SUNOS_N_TXTOFF(*execp, NMAGIC), 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, SUNOS_N_DATOFF(*execp, NMAGIC), 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, NBPG); 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 exec_aout_setup_stack(p, epp); 233} 234 235/* 236 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 237 */ 238int 239sunos_exec_aout_prep_omagic(p, epp) 240 struct proc *p; 241 struct exec_package *epp; 242{ 243 struct exec *execp = epp->ep_hdr; 244 long bsize, baddr; 245 246 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 247 epp->ep_tsize = execp->a_text; 248 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 249 epp->ep_dsize = execp->a_data + execp->a_bss; 250 epp->ep_entry = execp->a_entry; 251 252 /* set up command for text and data segments */ 253 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 254 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 255 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 256 257 /* set up command for bss segment */ 258 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 259 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 260 if (bsize > 0) 261 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 262 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 263 264 return exec_aout_setup_stack(p, epp); 265} 266#endif /* !sparc */ 267