sunos_exec.c revision 1.8
1/* $NetBSD: sunos_exec.c,v 1.8 1995/04/22 19:48:44 christos 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#include <machine/exec.h> 55 56#include <compat/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 65extern int nsunos_sysent; 66extern struct sysent sunos_sysent[]; 67#ifdef SYSCALL_DEBUG 68extern char *sunos_syscallnames[]; 69#endif 70extern void sunos_sendsig __P((sig_t, int, int, u_long)); 71extern char sigcode[], esigcode[]; 72 73struct emul emul_sunos = { 74 "sunos", 75 NULL, 76#ifdef sparc 77 sendsig, 78#else 79 sunos_sendsig, 80#endif 81 SUNOS_SYS_syscall, 82 SUNOS_SYS_MAXSYSCALL, 83 sunos_sysent, 84#ifdef SYSCALL_DEBUG 85 sunos_syscallnames, 86#else 87 NULL, 88#endif 89 0, 90 copyargs, 91 setregs, 92 sigcode, 93 esigcode, 94}; 95 96int 97sunos_exec_aout_makecmds(p, epp) 98 struct proc *p; 99 struct exec_package *epp; 100{ 101 struct sunos_exec *sunmag = epp->ep_hdr; 102 int error = ENOEXEC; 103 104 if(sunmag->a_machtype != SUNOS_M_NATIVE) 105 return (ENOEXEC); 106 107 switch (sunmag->a_magic) { 108 case ZMAGIC: 109 error = sunos_exec_aout_prep_zmagic(p, epp); 110 break; 111 case NMAGIC: 112 error = sunos_exec_aout_prep_nmagic(p, epp); 113 break; 114 case OMAGIC: 115 error = sunos_exec_aout_prep_omagic(p, epp); 116 break; 117 } 118 if (error==0) 119 epp->ep_emul = &emul_sunos; 120 return error; 121} 122 123/* 124 * the code below is only needed for sun3 emulation. 125 */ 126#ifndef sparc 127 128/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 129#define SEGSIZ 0x20000 130#define SUNOS_N_TXTADDR(x,m) __LDPGSZ 131#define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 132 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 133 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 134#define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 135 136#define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 137#define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 138 139/* 140 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 141 * 142 * First, set of the various offsets/lengths in the exec package. 143 * 144 * Then, mark the text image busy (so it can be demand paged) or error 145 * out if this is not possible. Finally, set up vmcmds for the 146 * text, data, bss, and stack segments. 147 */ 148int 149sunos_exec_aout_prep_zmagic(p, epp) 150 struct proc *p; 151 struct exec_package *epp; 152{ 153 struct exec *execp = epp->ep_hdr; 154 struct exec_vmcmd *ccmdp; 155 156 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 157 epp->ep_tsize = execp->a_text; 158 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 159 epp->ep_dsize = execp->a_data + execp->a_bss; 160 epp->ep_entry = execp->a_entry; 161 162 /* 163 * check if vnode is in open for writing, because we want to 164 * demand-page out of it. if it is, don't do it, for various 165 * reasons 166 */ 167 if ((execp->a_text != 0 || execp->a_data != 0) && 168 epp->ep_vp->v_writecount != 0) { 169#ifdef DIAGNOSTIC 170 if (epp->ep_vp->v_flag & VTEXT) 171 panic("exec: a VTEXT vnode has writecount != 0\n"); 172#endif 173 return ETXTBSY; 174 } 175 epp->ep_vp->v_flag |= VTEXT; 176 177 /* set up command for text segment */ 178 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 179 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 180 VM_PROT_READ|VM_PROT_EXECUTE); 181 182 /* set up command for data segment */ 183 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 184 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 185 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 186 187 /* set up command for bss segment */ 188 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 189 epp->ep_daddr + execp->a_data, NULLVP, 0, 190 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 191 192 return exec_aout_setup_stack(p, epp); 193} 194 195/* 196 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 197 */ 198int 199sunos_exec_aout_prep_nmagic(p, epp) 200 struct proc *p; 201 struct exec_package *epp; 202{ 203 struct exec *execp = epp->ep_hdr; 204 struct exec_vmcmd *ccmdp; 205 long bsize, baddr; 206 207 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 208 epp->ep_tsize = execp->a_text; 209 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 210 epp->ep_dsize = execp->a_data + execp->a_bss; 211 epp->ep_entry = execp->a_entry; 212 213 /* set up command for text segment */ 214 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 215 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 216 VM_PROT_READ|VM_PROT_EXECUTE); 217 218 /* set up command for data segment */ 219 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 220 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 221 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} 232 233/* 234 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 235 */ 236int 237sunos_exec_aout_prep_omagic(p, epp) 238 struct proc *p; 239 struct exec_package *epp; 240{ 241 struct exec *execp = epp->ep_hdr; 242 struct exec_vmcmd *ccmdp; 243 long bsize, baddr; 244 245 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 246 epp->ep_tsize = execp->a_text; 247 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 248 epp->ep_dsize = execp->a_data + execp->a_bss; 249 epp->ep_entry = execp->a_entry; 250 251 /* set up command for text and data segments */ 252 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 253 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 254 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 255 256 /* set up command for bss segment */ 257 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 258 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 259 if (bsize > 0) 260 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 261 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 262 263 return exec_aout_setup_stack(p, epp); 264} 265#endif /* !sparc */ 266