1 /* $NetBSD: sunos_exec.c,v 1.18 2000/04/11 04:37:50 chs 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 48 #include <machine/cpu.h> 49 #include <machine/reg.h> 50 51 #include <compat/sunos/sunos.h> 52 #include <compat/sunos/sunos_exec.h> 53 #include <compat/sunos/sunos_syscall.h> 54 55 #ifdef __sparc__ 56 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 57 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 58 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 59 #endif 60 61 int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 62 int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 63 int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 64 65 extern int nsunos_sysent; 66 extern struct sysent sunos_sysent[]; 67 #ifdef SYSCALL_DEBUG 68 extern char *sunos_syscallnames[]; 69 #endif 70 extern char sunos_sigcode[], sunos_esigcode[]; 71 const char sunos_emul_path[] = "/emul/sunos"; 72 73 struct emul emul_sunos = { 74 "sunos", 75 NULL, 76 sunos_sendsig, 77 SUNOS_SYS_syscall, 78 SUNOS_SYS_MAXSYSCALL, 79 sunos_sysent, 80 #ifdef SYSCALL_DEBUG 81 sunos_syscallnames, 82 #else 83 NULL, 84 #endif 85 0, 86 copyargs, 87 setregs, 88 sunos_sigcode, 89 sunos_esigcode, 90 }; 91 92 int 93 exec_sunos_aout_makecmds(p, epp) 94 struct proc *p; 95 struct exec_package *epp; 96 { 97 struct sunos_exec *sunmag = epp->ep_hdr; 98 int error = ENOEXEC; 99 100 if(sunmag->a_machtype != SUNOS_M_NATIVE) 101 return (ENOEXEC); 102 103 switch (sunmag->a_magic) { 104 case ZMAGIC: 105 error = sunos_exec_aout_prep_zmagic(p, epp); 106 break; 107 case NMAGIC: 108 error = sunos_exec_aout_prep_nmagic(p, epp); 109 break; 110 case OMAGIC: 111 error = sunos_exec_aout_prep_omagic(p, epp); 112 break; 113 } 114 if (error==0) 115 epp->ep_emul = &emul_sunos; 116 return error; 117 } 118 119 /* 120 * the code below is only needed for sun3 emulation. 121 */ 122 #ifndef __sparc__ 123 124 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 125 #define SEGSIZ 0x20000 126 #define SUNOS_N_TXTADDR(x,m) __LDPGSZ 127 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 128 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 129 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 130 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 131 132 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 133 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 134 135 /* 136 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 137 * 138 * First, set of the various offsets/lengths in the exec package. 139 * 140 * Then, mark the text image busy (so it can be demand paged) or error 141 * out if this is not possible. Finally, set up vmcmds for the 142 * text, data, bss, and stack segments. 143 */ 144 int 145 sunos_exec_aout_prep_zmagic(p, epp) 146 struct proc *p; 147 struct exec_package *epp; 148 { 149 struct exec *execp = epp->ep_hdr; 150 151 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 152 epp->ep_tsize = execp->a_text; 153 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 154 epp->ep_dsize = execp->a_data + execp->a_bss; 155 epp->ep_entry = execp->a_entry; 156 157 /* 158 * check if vnode is in open for writing, because we want to 159 * demand-page out of it. if it is, don't do it, for various 160 * reasons 161 */ 162 if ((execp->a_text != 0 || execp->a_data != 0) && 163 epp->ep_vp->v_writecount != 0) { 164 #ifdef DIAGNOSTIC 165 if (epp->ep_vp->v_flag & VTEXT) 166 panic("exec: a VTEXT vnode has writecount != 0\n"); 167 #endif 168 return ETXTBSY; 169 } 170 vn_marktext(epp->ep_vp); 171 172 /* set up command for text segment */ 173 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 174 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 175 VM_PROT_READ|VM_PROT_EXECUTE); 176 177 /* set up command for data segment */ 178 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 179 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 180 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 181 182 /* set up command for bss segment */ 183 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 184 epp->ep_daddr + execp->a_data, NULLVP, 0, 185 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 186 187 return exec_aout_setup_stack(p, epp); 188 } 189 190 /* 191 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 192 */ 193 int 194 sunos_exec_aout_prep_nmagic(p, epp) 195 struct proc *p; 196 struct exec_package *epp; 197 { 198 struct exec *execp = epp->ep_hdr; 199 long bsize, baddr; 200 201 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 202 epp->ep_tsize = execp->a_text; 203 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 204 epp->ep_dsize = execp->a_data + execp->a_bss; 205 epp->ep_entry = execp->a_entry; 206 207 /* set up command for text segment */ 208 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 209 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 210 VM_PROT_READ|VM_PROT_EXECUTE); 211 212 /* set up command for data segment */ 213 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 214 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 215 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 216 217 /* set up command for bss segment */ 218 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 219 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 220 if (bsize > 0) 221 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 222 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 223 224 return exec_aout_setup_stack(p, epp); 225 } 226 227 /* 228 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 229 */ 230 int 231 sunos_exec_aout_prep_omagic(p, epp) 232 struct proc *p; 233 struct exec_package *epp; 234 { 235 struct exec *execp = epp->ep_hdr; 236 long bsize, baddr; 237 238 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 239 epp->ep_tsize = execp->a_text; 240 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 241 epp->ep_dsize = execp->a_data + execp->a_bss; 242 epp->ep_entry = execp->a_entry; 243 244 /* set up command for text and data segments */ 245 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 246 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 247 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 248 249 /* set up command for bss segment */ 250 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 251 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 252 if (bsize > 0) 253 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 254 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 255 256 return exec_aout_setup_stack(p, epp); 257 } 258 #endif /* !sparc */ 259