sunos_exec.c revision 1.9
1/* $NetBSD: sunos_exec.c,v 1.9 1995/06/25 14:15:08 briggs 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[]; 72const char sunos_emul_path[] = "/emul/sunos"; 73 74struct emul emul_sunos = { 75 "sunos", 76 NULL, 77#ifdef sparc 78 sendsig, 79#else 80 sunos_sendsig, 81#endif 82 SUNOS_SYS_syscall, 83 SUNOS_SYS_MAXSYSCALL, 84 sunos_sysent, 85#ifdef SYSCALL_DEBUG 86 sunos_syscallnames, 87#else 88 NULL, 89#endif 90 0, 91 copyargs, 92 setregs, 93 sigcode, 94 esigcode, 95}; 96 97int 98sunos_exec_aout_makecmds(p, epp) 99 struct proc *p; 100 struct exec_package *epp; 101{ 102 struct sunos_exec *sunmag = epp->ep_hdr; 103 int error = ENOEXEC; 104 105 if(sunmag->a_machtype != SUNOS_M_NATIVE) 106 return (ENOEXEC); 107 108 switch (sunmag->a_magic) { 109 case ZMAGIC: 110 error = sunos_exec_aout_prep_zmagic(p, epp); 111 break; 112 case NMAGIC: 113 error = sunos_exec_aout_prep_nmagic(p, epp); 114 break; 115 case OMAGIC: 116 error = sunos_exec_aout_prep_omagic(p, epp); 117 break; 118 } 119 if (error==0) 120 epp->ep_emul = &emul_sunos; 121 return error; 122} 123 124/* 125 * the code below is only needed for sun3 emulation. 126 */ 127#ifndef sparc 128 129/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 130#define SEGSIZ 0x20000 131#define SUNOS_N_TXTADDR(x,m) __LDPGSZ 132#define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 133 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 134 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 135#define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 136 137#define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 138#define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 139 140/* 141 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 142 * 143 * First, set of the various offsets/lengths in the exec package. 144 * 145 * Then, mark the text image busy (so it can be demand paged) or error 146 * out if this is not possible. Finally, set up vmcmds for the 147 * text, data, bss, and stack segments. 148 */ 149int 150sunos_exec_aout_prep_zmagic(p, epp) 151 struct proc *p; 152 struct exec_package *epp; 153{ 154 struct exec *execp = epp->ep_hdr; 155 struct exec_vmcmd *ccmdp; 156 157 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 158 epp->ep_tsize = execp->a_text; 159 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 160 epp->ep_dsize = execp->a_data + execp->a_bss; 161 epp->ep_entry = execp->a_entry; 162 163 /* 164 * check if vnode is in open for writing, because we want to 165 * demand-page out of it. if it is, don't do it, for various 166 * reasons 167 */ 168 if ((execp->a_text != 0 || execp->a_data != 0) && 169 epp->ep_vp->v_writecount != 0) { 170#ifdef DIAGNOSTIC 171 if (epp->ep_vp->v_flag & VTEXT) 172 panic("exec: a VTEXT vnode has writecount != 0\n"); 173#endif 174 return ETXTBSY; 175 } 176 epp->ep_vp->v_flag |= VTEXT; 177 178 /* set up command for text segment */ 179 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 180 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 181 VM_PROT_READ|VM_PROT_EXECUTE); 182 183 /* set up command for data segment */ 184 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 185 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 186 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 187 188 /* set up command for bss segment */ 189 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 190 epp->ep_daddr + execp->a_data, NULLVP, 0, 191 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 192 193 return exec_aout_setup_stack(p, epp); 194} 195 196/* 197 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 198 */ 199int 200sunos_exec_aout_prep_nmagic(p, epp) 201 struct proc *p; 202 struct exec_package *epp; 203{ 204 struct exec *execp = epp->ep_hdr; 205 struct exec_vmcmd *ccmdp; 206 long bsize, baddr; 207 208 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 209 epp->ep_tsize = execp->a_text; 210 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 211 epp->ep_dsize = execp->a_data + execp->a_bss; 212 epp->ep_entry = execp->a_entry; 213 214 /* set up command for text segment */ 215 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 216 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 217 VM_PROT_READ|VM_PROT_EXECUTE); 218 219 /* set up command for data segment */ 220 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 221 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 222 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 223 224 /* set up command for bss segment */ 225 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 226 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 227 if (bsize > 0) 228 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 229 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 230 231 return exec_aout_setup_stack(p, epp); 232} 233 234/* 235 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 236 */ 237int 238sunos_exec_aout_prep_omagic(p, epp) 239 struct proc *p; 240 struct exec_package *epp; 241{ 242 struct exec *execp = epp->ep_hdr; 243 struct exec_vmcmd *ccmdp; 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