1 /* $NetBSD: sunos_exec_aout.c,v 1.4 2001/11/26 18:15:16 fredette 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/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: sunos_exec_aout.c,v 1.4 2001/11/26 18:15:16 fredette Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/filedesc.h> 36 #include <sys/kernel.h> 37 #include <sys/proc.h> 38 #include <sys/mount.h> 39 #include <sys/malloc.h> 40 #include <sys/namei.h> 41 #include <sys/signalvar.h> 42 #include <sys/vnode.h> 43 #include <sys/file.h> 44 #include <sys/exec.h> 45 #include <sys/resourcevar.h> 46 #include <sys/wait.h> 47 48 #include <sys/mman.h> 49 50 #include <machine/cpu.h> 51 #include <machine/reg.h> 52 53 #include <compat/sunos/sunos.h> 54 #include <compat/sunos/sunos_exec.h> 55 #include <compat/sunos/sunos_syscall.h> 56 57 #ifdef __sparc__ 58 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 59 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 60 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 61 #endif 62 63 int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 64 int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 65 int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 66 67 int 68 exec_sunos_aout_makecmds(p, epp) 69 struct proc *p; 70 struct exec_package *epp; 71 { 72 struct sunos_exec *sunmag = epp->ep_hdr; 73 int error = ENOEXEC; 74 75 if (!SUNOS_M_NATIVE(sunmag->a_machtype)) 76 return (ENOEXEC); 77 78 switch (sunmag->a_magic) { 79 case ZMAGIC: 80 error = sunos_exec_aout_prep_zmagic(p, epp); 81 break; 82 case NMAGIC: 83 error = sunos_exec_aout_prep_nmagic(p, epp); 84 break; 85 case OMAGIC: 86 error = sunos_exec_aout_prep_omagic(p, epp); 87 break; 88 } 89 return error; 90 } 91 92 /* 93 * the code below is only needed for sun2/sun3 emulation. 94 */ 95 #ifndef __sparc__ 96 97 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 98 #define SEGSIZ 0x20000 99 #define SUNOS_N_TXTADDR(x,m) 0x2000 100 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 101 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 102 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 103 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 104 105 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 106 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 107 108 /* 109 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 110 * 111 * First, set of the various offsets/lengths in the exec package. 112 * 113 * Then, mark the text image busy (so it can be demand paged) or error 114 * out if this is not possible. Finally, set up vmcmds for the 115 * text, data, bss, and stack segments. 116 */ 117 int 118 sunos_exec_aout_prep_zmagic(p, epp) 119 struct proc *p; 120 struct exec_package *epp; 121 { 122 struct exec *execp = epp->ep_hdr; 123 124 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 125 epp->ep_tsize = execp->a_text; 126 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 127 epp->ep_dsize = execp->a_data + execp->a_bss; 128 epp->ep_entry = execp->a_entry; 129 130 /* 131 * check if vnode is in open for writing, because we want to 132 * demand-page out of it. if it is, don't do it, for various 133 * reasons 134 */ 135 if ((execp->a_text != 0 || execp->a_data != 0) && 136 epp->ep_vp->v_writecount != 0) { 137 #ifdef DIAGNOSTIC 138 if (epp->ep_vp->v_flag & VTEXT) 139 panic("exec: a VTEXT vnode has writecount != 0\n"); 140 #endif 141 return ETXTBSY; 142 } 143 epp->ep_vp->v_flag |= VTEXT; 144 145 /* set up command for text segment */ 146 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 147 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 148 VM_PROT_READ|VM_PROT_EXECUTE); 149 150 /* set up command for data segment */ 151 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 152 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 153 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 154 155 /* set up command for bss segment */ 156 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 157 epp->ep_daddr + execp->a_data, NULLVP, 0, 158 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 159 160 return exec_aout_setup_stack(p, epp); 161 } 162 163 /* 164 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 165 */ 166 int 167 sunos_exec_aout_prep_nmagic(p, epp) 168 struct proc *p; 169 struct exec_package *epp; 170 { 171 struct exec *execp = epp->ep_hdr; 172 long bsize, baddr; 173 174 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 175 epp->ep_tsize = execp->a_text; 176 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 177 epp->ep_dsize = execp->a_data + execp->a_bss; 178 epp->ep_entry = execp->a_entry; 179 180 /* set up command for text segment */ 181 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 182 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 183 VM_PROT_READ|VM_PROT_EXECUTE); 184 185 /* set up command for data segment */ 186 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 187 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 188 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 189 190 /* set up command for bss segment */ 191 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 192 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 193 if (bsize > 0) 194 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 195 NULLVP, 0, 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_omagic(): Prepare a SunOS OMAGIC binary's exec package 202 */ 203 int 204 sunos_exec_aout_prep_omagic(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, OMAGIC); 212 epp->ep_tsize = execp->a_text; 213 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 214 epp->ep_dsize = execp->a_data + execp->a_bss; 215 epp->ep_entry = execp->a_entry; 216 217 /* set up command for text and data segments */ 218 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 219 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 220 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 221 222 /* set up command for bss segment */ 223 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 224 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 225 if (bsize > 0) 226 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 227 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 228 229 return exec_aout_setup_stack(p, epp); 230 } 231 #endif /* !sparc */ 232