1 /* $NetBSD: sunos_exec.c,v 1.12 1996/10/07 21:43:03 cgd 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/exec.h> 56 #include <compat/sunos/sunos.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 65 int sunos_exec_aout_makecmds __P((struct proc *, struct exec_package *)); 66 int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 67 int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 68 int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 69 70 extern int nsunos_sysent; 71 extern struct sysent sunos_sysent[]; 72 #ifdef SYSCALL_DEBUG 73 extern char *sunos_syscallnames[]; 74 #endif 75 extern char sigcode[], esigcode[]; 76 const char sunos_emul_path[] = "/emul/sunos"; 77 78 struct emul emul_sunos = { 79 "sunos", 80 NULL, 81 #ifdef sparc 82 sendsig, 83 #else 84 sunos_sendsig, 85 #endif 86 SUNOS_SYS_syscall, 87 SUNOS_SYS_MAXSYSCALL, 88 sunos_sysent, 89 #ifdef SYSCALL_DEBUG 90 sunos_syscallnames, 91 #else 92 NULL, 93 #endif 94 0, 95 copyargs, 96 setregs, 97 sigcode, 98 esigcode, 99 }; 100 101 int 102 sunos_exec_aout_makecmds(p, epp) 103 struct proc *p; 104 struct exec_package *epp; 105 { 106 struct sunos_exec *sunmag = epp->ep_hdr; 107 int error = ENOEXEC; 108 109 if(sunmag->a_machtype != SUNOS_M_NATIVE) 110 return (ENOEXEC); 111 112 switch (sunmag->a_magic) { 113 case ZMAGIC: 114 error = sunos_exec_aout_prep_zmagic(p, epp); 115 break; 116 case NMAGIC: 117 error = sunos_exec_aout_prep_nmagic(p, epp); 118 break; 119 case OMAGIC: 120 error = sunos_exec_aout_prep_omagic(p, epp); 121 break; 122 } 123 if (error==0) 124 epp->ep_emul = &emul_sunos; 125 return error; 126 } 127 128 /* 129 * the code below is only needed for sun3 emulation. 130 */ 131 #ifndef sparc 132 133 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 134 #define SEGSIZ 0x20000 135 #define SUNOS_N_TXTADDR(x,m) __LDPGSZ 136 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 137 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 138 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 139 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 140 141 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 142 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 143 144 /* 145 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 146 * 147 * First, set of the various offsets/lengths in the exec package. 148 * 149 * Then, mark the text image busy (so it can be demand paged) or error 150 * out if this is not possible. Finally, set up vmcmds for the 151 * text, data, bss, and stack segments. 152 */ 153 int 154 sunos_exec_aout_prep_zmagic(p, epp) 155 struct proc *p; 156 struct exec_package *epp; 157 { 158 struct exec *execp = epp->ep_hdr; 159 160 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 161 epp->ep_tsize = execp->a_text; 162 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 163 epp->ep_dsize = execp->a_data + execp->a_bss; 164 epp->ep_entry = execp->a_entry; 165 166 /* 167 * check if vnode is in open for writing, because we want to 168 * demand-page out of it. if it is, don't do it, for various 169 * reasons 170 */ 171 if ((execp->a_text != 0 || execp->a_data != 0) && 172 epp->ep_vp->v_writecount != 0) { 173 #ifdef DIAGNOSTIC 174 if (epp->ep_vp->v_flag & VTEXT) 175 panic("exec: a VTEXT vnode has writecount != 0\n"); 176 #endif 177 return ETXTBSY; 178 } 179 epp->ep_vp->v_flag |= VTEXT; 180 181 /* set up command for text segment */ 182 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 183 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 184 VM_PROT_READ|VM_PROT_EXECUTE); 185 186 /* set up command for data segment */ 187 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 188 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 189 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 190 191 /* set up command for bss segment */ 192 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 193 epp->ep_daddr + execp->a_data, NULLVP, 0, 194 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 195 196 return exec_aout_setup_stack(p, epp); 197 } 198 199 /* 200 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 201 */ 202 int 203 sunos_exec_aout_prep_nmagic(p, epp) 204 struct proc *p; 205 struct exec_package *epp; 206 { 207 struct exec *execp = epp->ep_hdr; 208 long bsize, baddr; 209 210 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 211 epp->ep_tsize = execp->a_text; 212 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 213 epp->ep_dsize = execp->a_data + execp->a_bss; 214 epp->ep_entry = execp->a_entry; 215 216 /* set up command for text segment */ 217 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 218 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 219 VM_PROT_READ|VM_PROT_EXECUTE); 220 221 /* set up command for data segment */ 222 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 223 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 224 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 225 226 /* set up command for bss segment */ 227 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 228 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 229 if (bsize > 0) 230 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 231 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 232 233 return exec_aout_setup_stack(p, epp); 234 } 235 236 /* 237 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 238 */ 239 int 240 sunos_exec_aout_prep_omagic(p, epp) 241 struct proc *p; 242 struct exec_package *epp; 243 { 244 struct exec *execp = epp->ep_hdr; 245 long bsize, baddr; 246 247 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 248 epp->ep_tsize = execp->a_text; 249 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 250 epp->ep_dsize = execp->a_data + execp->a_bss; 251 epp->ep_entry = execp->a_entry; 252 253 /* set up command for text and data segments */ 254 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 255 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 256 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 257 258 /* set up command for bss segment */ 259 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 260 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 261 if (bsize > 0) 262 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 263 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 264 265 return exec_aout_setup_stack(p, epp); 266 } 267 #endif /* !sparc */ 268