sunos_exec_aout.c revision 1.2
1 /* $NetBSD: sunos_exec_aout.c,v 1.2 2001/10/30 15:32:03 thorpej 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 47 #include <machine/cpu.h> 48 #include <machine/reg.h> 49 50 #include <compat/sunos/sunos.h> 51 #include <compat/sunos/sunos_exec.h> 52 #include <compat/sunos/sunos_syscall.h> 53 54 #ifdef __sparc__ 55 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 56 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 57 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 58 #endif 59 60 int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); 61 int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); 62 int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); 63 64 int 65 exec_sunos_aout_makecmds(p, epp) 66 struct proc *p; 67 struct exec_package *epp; 68 { 69 struct sunos_exec *sunmag = epp->ep_hdr; 70 int error = ENOEXEC; 71 72 if(sunmag->a_machtype != SUNOS_M_NATIVE) 73 return (ENOEXEC); 74 75 switch (sunmag->a_magic) { 76 case ZMAGIC: 77 error = sunos_exec_aout_prep_zmagic(p, epp); 78 break; 79 case NMAGIC: 80 error = sunos_exec_aout_prep_nmagic(p, epp); 81 break; 82 case OMAGIC: 83 error = sunos_exec_aout_prep_omagic(p, epp); 84 break; 85 } 86 return error; 87 } 88 89 /* 90 * the code below is only needed for sun3 emulation. 91 */ 92 #ifndef __sparc__ 93 94 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 95 #define SEGSIZ 0x20000 96 #define SUNOS_N_TXTADDR(x,m) __LDPGSZ 97 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 98 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 99 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 100 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 101 102 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 103 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 104 105 /* 106 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 107 * 108 * First, set of the various offsets/lengths in the exec package. 109 * 110 * Then, mark the text image busy (so it can be demand paged) or error 111 * out if this is not possible. Finally, set up vmcmds for the 112 * text, data, bss, and stack segments. 113 */ 114 int 115 sunos_exec_aout_prep_zmagic(p, epp) 116 struct proc *p; 117 struct exec_package *epp; 118 { 119 struct exec *execp = epp->ep_hdr; 120 121 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 122 epp->ep_tsize = execp->a_text; 123 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 124 epp->ep_dsize = execp->a_data + execp->a_bss; 125 epp->ep_entry = execp->a_entry; 126 127 /* 128 * check if vnode is in open for writing, because we want to 129 * demand-page out of it. if it is, don't do it, for various 130 * reasons 131 */ 132 if ((execp->a_text != 0 || execp->a_data != 0) && 133 epp->ep_vp->v_writecount != 0) { 134 #ifdef DIAGNOSTIC 135 if (epp->ep_vp->v_flag & VTEXT) 136 panic("exec: a VTEXT vnode has writecount != 0\n"); 137 #endif 138 return ETXTBSY; 139 } 140 epp->ep_vp->v_flag |= VTEXT; 141 142 /* set up command for text segment */ 143 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 144 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 145 VM_PROT_READ|VM_PROT_EXECUTE); 146 147 /* set up command for data segment */ 148 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 149 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 150 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 151 152 /* set up command for bss segment */ 153 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 154 epp->ep_daddr + execp->a_data, NULLVP, 0, 155 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 156 157 return exec_aout_setup_stack(p, epp); 158 } 159 160 /* 161 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 162 */ 163 int 164 sunos_exec_aout_prep_nmagic(p, epp) 165 struct proc *p; 166 struct exec_package *epp; 167 { 168 struct exec *execp = epp->ep_hdr; 169 long bsize, baddr; 170 171 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 172 epp->ep_tsize = execp->a_text; 173 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 174 epp->ep_dsize = execp->a_data + execp->a_bss; 175 epp->ep_entry = execp->a_entry; 176 177 /* set up command for text segment */ 178 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 179 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 180 VM_PROT_READ|VM_PROT_EXECUTE); 181 182 /* set up command for data segment */ 183 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 184 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 185 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 186 187 /* set up command for bss segment */ 188 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 189 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 190 if (bsize > 0) 191 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 192 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 193 194 return exec_aout_setup_stack(p, epp); 195 } 196 197 /* 198 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 199 */ 200 int 201 sunos_exec_aout_prep_omagic(p, epp) 202 struct proc *p; 203 struct exec_package *epp; 204 { 205 struct exec *execp = epp->ep_hdr; 206 long bsize, baddr; 207 208 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 209 epp->ep_tsize = execp->a_text; 210 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 211 epp->ep_dsize = execp->a_data + execp->a_bss; 212 epp->ep_entry = execp->a_entry; 213 214 /* set up command for text and data segments */ 215 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 216 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 217 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 218 219 /* set up command for bss segment */ 220 baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); 221 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 222 if (bsize > 0) 223 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 224 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 225 226 return exec_aout_setup_stack(p, epp); 227 } 228 #endif /* !sparc */ 229
Indexes created Tue Sep 23 07:09:52 GMT 2025