/* $NetBSD: exec_aout.h,v 1.1 2018/12/31 13:35:16 christos Exp $ */ /* * Copyright (c) 1993, 1994 Christopher G. Demetriou * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _SYS_EXEC_AOUT_H_ #define _SYS_EXEC_AOUT_H_ #ifndef N_PAGSIZ #define N_PAGSIZ(ex) (AOUT_LDPGSZ) #endif /* * Header prepended to each a.out file. * only manipulate the a_midmag field via the * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below. */ struct exec { uint32_t a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */ uint32_t a_text; /* text segment size */ uint32_t a_data; /* initialized data size */ uint32_t a_bss; /* uninitialized data size */ uint32_t a_syms; /* symbol table size */ uint32_t a_entry; /* entry point */ uint32_t a_trsize; /* text relocation size */ uint32_t a_drsize; /* data relocation size */ }; /* a_magic */ #define OMAGIC 0407 /* old impure format */ #define NMAGIC 0410 /* read-only text */ #define ZMAGIC 0413 /* demand load format */ #define QMAGIC 0314 /* "compact" demand load format; deprecated */ #include <sys/aout_mids.h> /* * a_flags */ #define EX_DYNAMIC 0x20 #define EX_PIC 0x10 #define EX_DPMASK 0x30 /* * Interpretation of the (a_flags & EX_DPMASK) bits: * * 00 traditional executable or object file * 01 object file contains PIC code (set by `as -k') * 10 dynamic executable * 11 position independent executable image * (eg. a shared library) * */ /* * The a.out structure's a_midmag field is a network-byteorder encoding * of this int * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM * Where `F' is 6 bits of flag like EX_DYNAMIC, * `m' is 10 bits of machine-id like MID_I386, and * `M' is 16 bits worth of magic number, ie. ZMAGIC. * The macros below will set/get the needed fields. */ #define N_GETMAGIC(ex) \ ((((ex).a_midmag)&0xffff0000) ? \ (be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag)) #define N_GETMAGIC2(ex) \ ((((ex).a_midmag)&0xffff0000) ? \ (be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000)) #define N_GETMID(ex) \ ((((ex).a_midmag)&0xffff0000) ? \ ((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO) #define N_GETFLAG(ex) \ ((((ex).a_midmag)&0xffff0000) ? \ ((be32toh((uint32_t)((ex).a_midmag))>>26)&0x3f) : 0) #define N_SETMAGIC(ex,mag,mid,flag) \ ((ex).a_midmag = htobe32((uint32_t) \ ((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff))))) #define N_ALIGN(ex,x) \ (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \ ((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x)) /* Valid magic number check. */ #define N_BADMAG(ex) \ (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \ N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC) /* Address of the bottom of the text segment. */ #define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ) /* Address of the bottom of the data segment. */ #define N_DATADDR(ex) \ (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \ (N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1)) /* Address of the bottom of the bss segment. */ #define N_BSSADDR(ex) \ (N_DATADDR(ex) + (ex).a_data) /* Text segment offset. */ #define N_TXTOFF(ex) \ ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \ 0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \ sizeof(struct exec)) ) /* Data segment offset. */ #define N_DATOFF(ex) \ N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text) /* Text relocation table offset. */ #define N_TRELOFF(ex) \ (N_DATOFF(ex) + (ex).a_data) /* Data relocation table offset. */ #define N_DRELOFF(ex) \ (N_TRELOFF(ex) + (ex).a_trsize) /* Symbol table offset. */ #define N_SYMOFF(ex) \ (N_DRELOFF(ex) + (ex).a_drsize) /* String table offset. */ #define N_STROFF(ex) \ (N_SYMOFF(ex) + (ex).a_syms) #include <machine/aout_machdep.h> #ifdef _KERNEL /* the "a.out" format's entry in the exec switch */ int exec_aout_makecmds(struct lwp *, struct exec_package *); /* functions which prepare various a.out executable types */ /* * MI portion */ int exec_aout_prep_zmagic(struct lwp *, struct exec_package *); int exec_aout_prep_nmagic(struct lwp *, struct exec_package *); int exec_aout_prep_omagic(struct lwp *, struct exec_package *); /* For compatibility modules */ int exec_aout_prep_oldzmagic(struct lwp *, struct exec_package *); int exec_aout_prep_oldnmagic(struct lwp *, struct exec_package *); int exec_aout_prep_oldomagic(struct lwp *, struct exec_package *); /* * MD portion */ #ifndef cpu_exec_aout_makecmds int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *); #endif #endif /* _KERNEL */ #endif /* !_SYS_EXEC_AOUT_H_ */
