1 /* $NetBSD: sunos_exec.c,v 1.11 1996/05/05 12:01:47 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.h> 58 #include <compat/sunos/sunos_syscall.h> 59 60 #ifdef sparc 61 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 62 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 63 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 64 #endif 65 66 int sunos_exec_aout_makecmds __P((struct proc *, struct exec_package *)); 67 int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 68 int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 69 int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 70 71 extern int nsunos_sysent; 72 extern struct sysent sunos_sysent[]; 73 #ifdef SYSCALL_DEBUG 74 extern char *sunos_syscallnames[]; 75 #endif 76 extern char sigcode[], esigcode[]; 77 const char sunos_emul_path[] = "/emul/sunos"; 78 79 struct emul emul_sunos = { 80 "sunos", 81 NULL, 82 #ifdef sparc 83 sendsig, 84 #else 85 sunos_sendsig, 86 #endif 87 SUNOS_SYS_syscall, 88 SUNOS_SYS_MAXSYSCALL, 89 sunos_sysent, 90 #ifdef SYSCALL_DEBUG 91 sunos_syscallnames, 92 #else 93 NULL, 94 #endif 95 0, 96 copyargs, 97 setregs, 98 sigcode, 99 esigcode, 100 }; 101 102 int 103 sunos_exec_aout_makecmds(p, epp) 104 struct proc *p; 105 struct exec_package *epp; 106 { 107 struct sunos_exec *sunmag = epp->ep_hdr; 108 int error = ENOEXEC; 109 110 if(sunmag->a_machtype != SUNOS_M_NATIVE) 111 return (ENOEXEC); 112 113 switch (sunmag->a_magic) { 114 case ZMAGIC: 115 error = sunos_exec_aout_prep_zmagic(p, epp); 116 break; 117 case NMAGIC: 118 error = sunos_exec_aout_prep_nmagic(p, epp); 119 break; 120 case OMAGIC: 121 error = sunos_exec_aout_prep_omagic(p, epp); 122 break; 123 } 124 if (error==0) 125 epp->ep_emul = &emul_sunos; 126 return error; 127 } 128 129 /* 130 * the code below is only needed for sun3 emulation. 131 */ 132 #ifndef sparc 133 134 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 135 #define SEGSIZ 0x20000 136 #define SUNOS_N_TXTADDR(x,m) __LDPGSZ 137 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 138 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 139 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 140 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 141 142 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 143 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 144 145 /* 146 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 147 * 148 * First, set of the various offsets/lengths in the exec package. 149 * 150 * Then, mark the text image busy (so it can be demand paged) or error 151 * out if this is not possible. Finally, set up vmcmds for the 152 * text, data, bss, and stack segments. 153 */ 154 int 155 sunos_exec_aout_prep_zmagic(p, epp) 156 struct proc *p; 157 struct exec_package *epp; 158 { 159 struct exec *execp = epp->ep_hdr; 160 161 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 162 epp->ep_tsize = execp->a_text; 163 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 164 epp->ep_dsize = execp->a_data + execp->a_bss; 165 epp->ep_entry = execp->a_entry; 166 167 /* 168 * check if vnode is in open for writing, because we want to 169 * demand-page out of it. if it is, don't do it, for various 170 * reasons 171 */ 172 if ((execp->a_text != 0 || execp->a_data != 0) && 173 epp->ep_vp->v_writecount != 0) { 174 #ifdef DIAGNOSTIC 175 if (epp->ep_vp->v_flag & VTEXT) 176 panic("exec: a VTEXT vnode has writecount != 0\n"); 177 #endif 178 return ETXTBSY; 179 } 180 epp->ep_vp->v_flag |= VTEXT; 181 182 /* set up command for text segment */ 183 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 184 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 185 VM_PROT_READ|VM_PROT_EXECUTE); 186 187 /* set up command for data segment */ 188 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 189 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 190 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 191 192 /* set up command for bss segment */ 193 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 194 epp->ep_daddr + execp->a_data, NULLVP, 0, 195 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 196 197 return exec_aout_setup_stack(p, epp); 198 } 199 200 /* 201 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 202 */ 203 int 204 sunos_exec_aout_prep_nmagic(p, epp) 205 struct proc *p; 206 struct exec_package *epp; 207 { 208 struct exec *execp = epp->ep_hdr; 209 long bsize, baddr; 210 211 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 212 epp->ep_tsize = execp->a_text; 213 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 214 epp->ep_dsize = execp->a_data + execp->a_bss; 215 epp->ep_entry = execp->a_entry; 216 217 /* set up command for text segment */ 218 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 219 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 220 VM_PROT_READ|VM_PROT_EXECUTE); 221 222 /* set up command for data segment */ 223 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 224 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 225 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 226 227 /* set up command for bss segment */ 228 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 229 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 230 if (bsize > 0) 231 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 232 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 233 234 return exec_aout_setup_stack(p, epp); 235 } 236 237 /* 238 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 239 */ 240 int 241 sunos_exec_aout_prep_omagic(p, epp) 242 struct proc *p; 243 struct exec_package *epp; 244 { 245 struct exec *execp = epp->ep_hdr; 246 long bsize, baddr; 247 248 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 249 epp->ep_tsize = execp->a_text; 250 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 251 epp->ep_dsize = execp->a_data + execp->a_bss; 252 epp->ep_entry = execp->a_entry; 253 254 /* set up command for text and data segments */ 255 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 256 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 257 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 258 259 /* set up command for bss segment */ 260 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 261 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 262 if (bsize > 0) 263 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 264 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 265 266 return exec_aout_setup_stack(p, epp); 267 } 268 #endif /* !sparc */ 269