183 lines
6.1 KiB
C
183 lines
6.1 KiB
C
/* $NetBSD: exec_aout.h,v 1.1 2011/07/16 15:52:02 tsutsui Exp $ */
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/*
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* Copyright (c) 1993, 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_EXEC_AOUT_H_
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#define _SYS_EXEC_AOUT_H_
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#ifndef N_PAGSIZ
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#define N_PAGSIZ(ex) (AOUT_LDPGSZ)
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#endif
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/*
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* Header prepended to each a.out file.
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* only manipulate the a_midmag field via the
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* N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
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*/
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struct exec {
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uint32_t a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */
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uint32_t a_text; /* text segment size */
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uint32_t a_data; /* initialized data size */
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uint32_t a_bss; /* uninitialized data size */
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uint32_t a_syms; /* symbol table size */
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uint32_t a_entry; /* entry point */
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uint32_t a_trsize; /* text relocation size */
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uint32_t a_drsize; /* data relocation size */
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};
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/* a_magic */
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#define OMAGIC 0407 /* old impure format */
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#define NMAGIC 0410 /* read-only text */
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#define ZMAGIC 0413 /* demand load format */
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#define QMAGIC 0314 /* "compact" demand load format; deprecated */
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#include <sys/aout_mids.h>
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/*
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* a_flags
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*/
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#define EX_DYNAMIC 0x20
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#define EX_PIC 0x10
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#define EX_DPMASK 0x30
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/*
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* Interpretation of the (a_flags & EX_DPMASK) bits:
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*
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* 00 traditional executable or object file
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* 01 object file contains PIC code (set by `as -k')
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* 10 dynamic executable
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* 11 position independent executable image
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* (eg. a shared library)
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*
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*/
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/*
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* The a.out structure's a_midmag field is a network-byteorder encoding
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* of this int
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* FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
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* Where `F' is 6 bits of flag like EX_DYNAMIC,
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* `m' is 10 bits of machine-id like MID_I386, and
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* `M' is 16 bits worth of magic number, ie. ZMAGIC.
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* The macros below will set/get the needed fields.
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*/
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#define N_GETMAGIC(ex) \
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((((ex).a_midmag)&0xffff0000) ? \
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(be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag))
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#define N_GETMAGIC2(ex) \
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((((ex).a_midmag)&0xffff0000) ? \
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(be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000))
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#define N_GETMID(ex) \
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((((ex).a_midmag)&0xffff0000) ? \
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((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO)
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#define N_GETFLAG(ex) \
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((((ex).a_midmag)&0xffff0000) ? \
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((be32toh((uint32_t)((ex).a_midmag))>>26)&0x3f) : 0)
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#define N_SETMAGIC(ex,mag,mid,flag) \
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((ex).a_midmag = htobe32((uint32_t) \
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((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff)))))
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#define N_ALIGN(ex,x) \
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(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
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((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x))
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/* Valid magic number check. */
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#define N_BADMAG(ex) \
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(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
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N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
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/* Address of the bottom of the text segment. */
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#define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ)
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/* Address of the bottom of the data segment. */
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#define N_DATADDR(ex) \
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(N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
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(N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1))
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/* Address of the bottom of the bss segment. */
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#define N_BSSADDR(ex) \
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(N_DATADDR(ex) + (ex).a_data)
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/* Text segment offset. */
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#define N_TXTOFF(ex) \
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( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
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0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \
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sizeof(struct exec)) )
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/* Data segment offset. */
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#define N_DATOFF(ex) \
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N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
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/* Text relocation table offset. */
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#define N_TRELOFF(ex) \
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(N_DATOFF(ex) + (ex).a_data)
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/* Data relocation table offset. */
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#define N_DRELOFF(ex) \
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(N_TRELOFF(ex) + (ex).a_trsize)
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/* Symbol table offset. */
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#define N_SYMOFF(ex) \
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(N_DRELOFF(ex) + (ex).a_drsize)
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/* String table offset. */
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#define N_STROFF(ex) \
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(N_SYMOFF(ex) + (ex).a_syms)
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#include <machine/aout_machdep.h>
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#ifdef _KERNEL
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/* the "a.out" format's entry in the exec switch */
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int exec_aout_makecmds(struct lwp *, struct exec_package *);
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/* functions which prepare various a.out executable types */
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/*
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* MI portion
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*/
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int exec_aout_prep_zmagic(struct lwp *, struct exec_package *);
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int exec_aout_prep_nmagic(struct lwp *, struct exec_package *);
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int exec_aout_prep_omagic(struct lwp *, struct exec_package *);
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/* For compatibility modules */
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int exec_aout_prep_oldzmagic(struct lwp *, struct exec_package *);
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int exec_aout_prep_oldnmagic(struct lwp *, struct exec_package *);
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int exec_aout_prep_oldomagic(struct lwp *, struct exec_package *);
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/*
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* MD portion
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*/
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#ifndef cpu_exec_aout_makecmds
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int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *);
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#endif
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#endif /* _KERNEL */
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#endif /* !_SYS_EXEC_AOUT_H_ */
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