| 1 | /* $NetBSD: exec_aout.h,v 1.41 2016/06/03 15:14:57 dholland Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1993, 1994 Christopher G. Demetriou |
| 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. All advertising materials mentioning features or use of this software |
| 16 | * must display the following acknowledgement: |
| 17 | * This product includes software developed by Christopher G. Demetriou. |
| 18 | * 4. The name of the author may not be used to endorse or promote products |
| 19 | * derived from this software without specific prior written permission |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #ifndef _SYS_EXEC_AOUT_H_ |
| 34 | #define _SYS_EXEC_AOUT_H_ |
| 35 | |
| 36 | #ifndef N_PAGSIZ |
| 37 | #define N_PAGSIZ(ex) (AOUT_LDPGSZ) |
| 38 | #endif |
| 39 | |
| 40 | /* |
| 41 | * Header prepended to each a.out file. |
| 42 | * only manipulate the a_midmag field via the |
| 43 | * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below. |
| 44 | */ |
| 45 | struct exec { |
| 46 | unsigned long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */ |
| 47 | unsigned long a_text; /* text segment size */ |
| 48 | unsigned long a_data; /* initialized data size */ |
| 49 | unsigned long a_bss; /* uninitialized data size */ |
| 50 | unsigned long a_syms; /* symbol table size */ |
| 51 | unsigned long a_entry; /* entry point */ |
| 52 | unsigned long a_trsize; /* text relocation size */ |
| 53 | unsigned long a_drsize; /* data relocation size */ |
| 54 | }; |
| 55 | |
| 56 | /* a_magic */ |
| 57 | #define OMAGIC 0407 /* old impure format */ |
| 58 | #define NMAGIC 0410 /* read-only text */ |
| 59 | #define ZMAGIC 0413 /* demand load format */ |
| 60 | #define QMAGIC 0314 /* "compact" demand load format; deprecated */ |
| 61 | |
| 62 | #include <sys/aout_mids.h> |
| 63 | |
| 64 | /* |
| 65 | * a_flags |
| 66 | */ |
| 67 | #define EX_DYNAMIC 0x20 |
| 68 | #define EX_PIC 0x10 |
| 69 | #define EX_DPMASK 0x30 |
| 70 | /* |
| 71 | * Interpretation of the (a_flags & EX_DPMASK) bits: |
| 72 | * |
| 73 | * 00 traditional executable or object file |
| 74 | * 01 object file contains PIC code (set by `as -k') |
| 75 | * 10 dynamic executable |
| 76 | * 11 position independent executable image |
| 77 | * (eg. a shared library) |
| 78 | * |
| 79 | */ |
| 80 | |
| 81 | /* |
| 82 | * The a.out structure's a_midmag field is a network-byteorder encoding |
| 83 | * of this int |
| 84 | * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM |
| 85 | * Where `F' is 6 bits of flag like EX_DYNAMIC, |
| 86 | * `m' is 10 bits of machine-id like MID_I386, and |
| 87 | * `M' is 16 bits worth of magic number, ie. ZMAGIC. |
| 88 | * The macros below will set/get the needed fields. |
| 89 | */ |
| 90 | #define N_GETMAGIC(ex) \ |
| 91 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
| 92 | (be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag)) |
| 93 | #define N_GETMAGIC2(ex) \ |
| 94 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
| 95 | (be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000)) |
| 96 | #define N_GETMID(ex) \ |
| 97 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
| 98 | ((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO) |
| 99 | #define N_GETFLAG(ex) \ |
| 100 | ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \ |
| 101 | ((be32toh((uint32_t)((ex).a_midmag))>>26)&0x3f) : 0) |
| 102 | #define N_SETMAGIC(ex,mag,mid,flag) \ |
| 103 | ((ex).a_midmag = htobe32((uint32_t) \ |
| 104 | ((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff))))) |
| 105 | |
| 106 | #define N_ALIGN(ex,x) \ |
| 107 | (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \ |
| 108 | ((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x)) |
| 109 | |
| 110 | /* Valid magic number check. */ |
| 111 | #define N_BADMAG(ex) \ |
| 112 | (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \ |
| 113 | N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC) |
| 114 | |
| 115 | /* Address of the bottom of the text segment. */ |
| 116 | #define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ) |
| 117 | |
| 118 | /* Address of the bottom of the data segment. */ |
| 119 | #define N_DATADDR(ex) \ |
| 120 | (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \ |
| 121 | (N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1)) |
| 122 | |
| 123 | /* Address of the bottom of the bss segment. */ |
| 124 | #define N_BSSADDR(ex) \ |
| 125 | (N_DATADDR(ex) + (ex).a_data) |
| 126 | |
| 127 | /* Text segment offset. */ |
| 128 | #define N_TXTOFF(ex) \ |
| 129 | ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \ |
| 130 | 0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \ |
| 131 | sizeof(struct exec)) ) |
| 132 | |
| 133 | /* Data segment offset. */ |
| 134 | #define N_DATOFF(ex) \ |
| 135 | N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text) |
| 136 | |
| 137 | /* Text relocation table offset. */ |
| 138 | #define N_TRELOFF(ex) \ |
| 139 | (N_DATOFF(ex) + (ex).a_data) |
| 140 | |
| 141 | /* Data relocation table offset. */ |
| 142 | #define N_DRELOFF(ex) \ |
| 143 | (N_TRELOFF(ex) + (ex).a_trsize) |
| 144 | |
| 145 | /* Symbol table offset. */ |
| 146 | #define N_SYMOFF(ex) \ |
| 147 | (N_DRELOFF(ex) + (ex).a_drsize) |
| 148 | |
| 149 | /* String table offset. */ |
| 150 | #define N_STROFF(ex) \ |
| 151 | (N_SYMOFF(ex) + (ex).a_syms) |
| 152 | |
| 153 | #include <machine/aout_machdep.h> |
| 154 | |
| 155 | #ifdef _KERNEL |
| 156 | |
| 157 | /* the "a.out" format's entry in the exec switch */ |
| 158 | int exec_aout_makecmds(struct lwp *, struct exec_package *); |
| 159 | |
| 160 | /* functions which prepare various a.out executable types */ |
| 161 | /* |
| 162 | * MI portion |
| 163 | */ |
| 164 | int exec_aout_prep_zmagic(struct lwp *, struct exec_package *); |
| 165 | int exec_aout_prep_nmagic(struct lwp *, struct exec_package *); |
| 166 | int exec_aout_prep_omagic(struct lwp *, struct exec_package *); |
| 167 | |
| 168 | /* For compatibility modules */ |
| 169 | int exec_aout_prep_oldzmagic(struct lwp *, struct exec_package *); |
| 170 | int exec_aout_prep_oldnmagic(struct lwp *, struct exec_package *); |
| 171 | int exec_aout_prep_oldomagic(struct lwp *, struct exec_package *); |
| 172 | |
| 173 | /* |
| 174 | * MD portion |
| 175 | */ |
| 176 | #ifndef cpu_exec_aout_makecmds |
| 177 | int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *); |
| 178 | #endif |
| 179 | |
| 180 | #endif /* _KERNEL */ |
| 181 | |
| 182 | #endif /* !_SYS_EXEC_AOUT_H_ */ |
| 183 | |