sunos_exec.c revision 1.25
1/* $NetBSD: sunos_exec.c,v 1.25 2000/12/01 13:21:37 jdolecek 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 "opt_syscall_debug.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/filedesc.h> 35#include <sys/kernel.h> 36#include <sys/proc.h> 37#include <sys/mount.h> 38#include <sys/malloc.h> 39#include <sys/namei.h> 40#include <sys/signalvar.h> 41#include <sys/vnode.h> 42#include <sys/file.h> 43#include <sys/exec.h> 44#include <sys/resourcevar.h> 45#include <sys/wait.h> 46 47#include <sys/mman.h> 48 49#include <machine/cpu.h> 50#include <machine/reg.h> 51 52#include <compat/sunos/sunos.h> 53#include <compat/sunos/sunos_exec.h> 54#include <compat/sunos/sunos_syscall.h> 55 56#ifdef __sparc__ 57#define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 58#define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 59#define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 60#endif 61 62int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 63int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 64int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 65 66extern int nsunos_sysent; 67extern struct sysent sunos_sysent[]; 68#ifdef SYSCALL_DEBUG 69extern const char * const sunos_syscallnames[]; 70#endif 71extern char sunos_sigcode[], sunos_esigcode[]; 72 73struct emul emul_sunos = { 74 "sunos", 75 "/emul/sunos", 76 NULL, 77 sunos_sendsig, 78 SUNOS_SYS_syscall, 79 SUNOS_SYS_MAXSYSCALL, 80 sunos_sysent, 81#ifdef SYSCALL_DEBUG 82 sunos_syscallnames, 83#else 84 NULL, 85#endif 86 sunos_sigcode, 87 sunos_esigcode, 88}; 89 90int 91exec_sunos_aout_makecmds(p, epp) 92 struct proc *p; 93 struct exec_package *epp; 94{ 95 struct sunos_exec *sunmag = epp->ep_hdr; 96 int error = ENOEXEC; 97 98 if(sunmag->a_machtype != SUNOS_M_NATIVE) 99 return (ENOEXEC); 100 101 switch (sunmag->a_magic) { 102 case ZMAGIC: 103 error = sunos_exec_aout_prep_zmagic(p, epp); 104 break; 105 case NMAGIC: 106 error = sunos_exec_aout_prep_nmagic(p, epp); 107 break; 108 case OMAGIC: 109 error = sunos_exec_aout_prep_omagic(p, epp); 110 break; 111 } 112 return error; 113} 114 115/* 116 * the code below is only needed for sun3 emulation. 117 */ 118#ifndef __sparc__ 119 120/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 121#define SEGSIZ 0x20000 122#define SUNOS_N_TXTADDR(x,m) __LDPGSZ 123#define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 124 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 125 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 126#define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 127 128#define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 129#define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 130 131/* 132 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 133 * 134 * First, set of the various offsets/lengths in the exec package. 135 * 136 * Then, mark the text image busy (so it can be demand paged) or error 137 * out if this is not possible. Finally, set up vmcmds for the 138 * text, data, bss, and stack segments. 139 */ 140int 141sunos_exec_aout_prep_zmagic(p, epp) 142 struct proc *p; 143 struct exec_package *epp; 144{ 145 struct exec *execp = epp->ep_hdr; 146 147 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 148 epp->ep_tsize = execp->a_text; 149 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 150 epp->ep_dsize = execp->a_data + execp->a_bss; 151 epp->ep_entry = execp->a_entry; 152 153 /* 154 * check if vnode is in open for writing, because we want to 155 * demand-page out of it. if it is, don't do it, for various 156 * reasons 157 */ 158 if ((execp->a_text != 0 || execp->a_data != 0) && 159 epp->ep_vp->v_writecount != 0) { 160#ifdef DIAGNOSTIC 161 if (epp->ep_vp->v_flag & VTEXT) 162 panic("exec: a VTEXT vnode has writecount != 0\n"); 163#endif 164 return ETXTBSY; 165 } 166 vn_marktext(epp->ep_vp); 167 168 /* set up command for text segment */ 169 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 170 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 171 VM_PROT_READ|VM_PROT_EXECUTE); 172 173 /* set up command for data segment */ 174 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 175 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 176 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 177 178 /* set up command for bss segment */ 179 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 180 epp->ep_daddr + execp->a_data, NULLVP, 0, 181 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 182 183 return exec_aout_setup_stack(p, epp); 184} 185 186/* 187 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 188 */ 189int 190sunos_exec_aout_prep_nmagic(p, epp) 191 struct proc *p; 192 struct exec_package *epp; 193{ 194 struct exec *execp = epp->ep_hdr; 195 long bsize, baddr; 196 197 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 198 epp->ep_tsize = execp->a_text; 199 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 200 epp->ep_dsize = execp->a_data + execp->a_bss; 201 epp->ep_entry = execp->a_entry; 202 203 /* set up command for text segment */ 204 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 205 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 206 VM_PROT_READ|VM_PROT_EXECUTE); 207 208 /* set up command for data segment */ 209 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 210 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 211 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 212 213 /* set up command for bss segment */ 214 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 215 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 216 if (bsize > 0) 217 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 218 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 219 220 return exec_aout_setup_stack(p, epp); 221} 222 223/* 224 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 225 */ 226int 227sunos_exec_aout_prep_omagic(p, epp) 228 struct proc *p; 229 struct exec_package *epp; 230{ 231 struct exec *execp = epp->ep_hdr; 232 long bsize, baddr; 233 234 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 235 epp->ep_tsize = execp->a_text; 236 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 237 epp->ep_dsize = execp->a_data + execp->a_bss; 238 epp->ep_entry = execp->a_entry; 239 240 /* set up command for text and data segments */ 241 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 242 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 243 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 244 245 /* set up command for bss segment */ 246 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 247 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 248 if (bsize > 0) 249 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 250 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 251 252 return exec_aout_setup_stack(p, epp); 253} 254#endif /* !sparc */ 255