460 lines
11 KiB
C
460 lines
11 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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*/
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/*
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* This program converts ack.out format to XENIX386 x.out format.
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* It uses ~em/modules/lib/libobject.a.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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struct xexec {
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unsigned short x_magic;
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#define XMAGIC 01006
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unsigned short x_ext; /* 054 */
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long x_text;
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long x_data;
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long x_bss;
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long x_syms;
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long x_reloc; /* 0 */
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long x_entry; /* 0 */
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char x_cpu;
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#define XBSWAP 0x80
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#define XWSWAP 0x40
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#define X8086 0x04
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#define X286 0x09
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#define X386 0x0a
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char x_relsym; /* 0144, not used */
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unsigned short x_renv;
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#define XV5 0xc000
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#define XVERS 0xc000 /* version mask */
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#define XLOCK 0x1000
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#define XSEG 0x0800 /* segment table present */
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#define XPURE 0x0004 /* pure text */
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#define XSEP 0x0002 /* separate I & D */
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#define XEXEC 0x0001 /* executable */
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};
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struct xext {
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long xe_trsize, xe_drsize, xe_tbase, xe_dbase; /* 0 */
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long xe_stksize;
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long xe_segpos; /* 0140 ??? */
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long xe_segsize; /* 2 or 3 segments */
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/* one for name table, one for text+data
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or one for text + one for data(-i)
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*/
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long xe_mdtpos, xe_mdtsize; /* 0 */
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char xe_mdttype; /* 0 */
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char xe_pagesize; /* 2 */
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char xe_ostype; /* 1 */
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char xe_osvers; /* 2 */
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unsigned short xe_eseg; /* 077 ??? */
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unsigned short xe_sres; /* 0 */
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};
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struct xseg {
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unsigned short xs_type;
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#define XTEXT 1
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#define XDATA 2
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#define XTSYMS 3
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unsigned short xs_attr;
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#define XAMEM 0x8000
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#define X_ABSS 0x0004
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#define X_APURE 0x0008
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#define X_A32B 0x0040
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unsigned short xs_seg; /* 077 for text, 0107 for data, 0 for sym */
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unsigned short xs_sres; /* 0 */
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long xs_filpos;
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long xs_psize;
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long xs_vsize;
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long xs_rbase;
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long xs_lres; /* 0 */
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long xs_lres2; /* 0 */
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};
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#include <out.h>
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#ifndef NORCSID
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static char rcs_id[] = "$Id$" ;
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#endif
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#define ENTRY 0x0L /* entry point */
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/*
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* Header and section table of new format object file.
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*/
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struct outhead outhead;
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struct outsect outsect[S_MAX];
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struct xexec exec;
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struct xext ext;
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struct xseg seg[3];
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char *output_file;
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int outputfile_created;
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int output;
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char *program ;
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#define TEXTSG 0
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#define ROMSG 1
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#define DATASG 2
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#define BSSSG 3
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#define LSECT BSSSG+1
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#define NSECT LSECT+1
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long emit_symtab();
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int sep_id;
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long
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align(n, a)
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long n;
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{
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return ((n + a - 1) / a) * a;
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}
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main(argc, argv)
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int argc;
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char *argv[];
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{
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output = 1;
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program= argv[0] ;
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switch (argc) {
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case 1: rd_fdopen(0);
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break;
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case 3: if ((output = creat(argv[2], 0644)) < 0) {
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fatal("Can't write %s.\n", argv[2]);
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}
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output_file = argv[2];
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outputfile_created = 1;
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/* FALLTHROUGH */
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case 2:
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if (! rd_open(argv[1]))
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fatal("Can't read %s.\n", argv[1]);
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break;
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default:fatal("Usage: %s <ACK object> <Xenix object>.\n", argv[0]);
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}
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rd_ohead(&outhead);
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if (BADMAGIC(outhead))
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fatal("Not an ack object file.\n");
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if (outhead.oh_flags & HF_LINK)
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fatal("Contains unresolved references.\n");
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if (outhead.oh_nrelo > 0)
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fprintf(stderr, "Warning: relocation information present.\n");
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if ( outhead.oh_nsect!=LSECT && outhead.oh_nsect!=NSECT )
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fatal("Input file must have %d sections, not %ld\n",
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NSECT,outhead.oh_nsect) ;
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rd_sect(outsect, outhead.oh_nsect);
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while (outsect[TEXTSG].os_size % outsect[TEXTSG].os_lign)
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outsect[TEXTSG].os_size++;
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while (outsect[ROMSG].os_size % outsect[ROMSG].os_lign)
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outsect[ROMSG].os_size++;
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while (outsect[DATASG].os_size % outsect[DATASG].os_lign)
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outsect[DATASG].os_size++;
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/* A few checks */
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if ( outsect[TEXTSG].os_base != ENTRY)
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fatal("text must start at 0x%lx not at 0x%lx\n", ENTRY,
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outsect[TEXTSG].os_base) ;
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if ( outsect[BSSSG].os_flen != 0 )
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fatal("bss space contains initialized data\n") ;
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if ( outsect[BSSSG].os_base != outsect[DATASG].os_base+
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outsect[DATASG].os_size )
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fatal("bss segment must follow data segment\n") ;
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exec.x_magic = XMAGIC;
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exec.x_ext = 054;
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exec.x_text = outsect[TEXTSG].os_size;
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exec.x_data = outsect[ROMSG].os_size + outsect[DATASG].os_size;
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exec.x_bss = outsect[BSSSG].os_size;
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exec.x_entry = outsect[TEXTSG].os_base;
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exec.x_cpu = XWSWAP | X386;
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exec.x_relsym = 0144;
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exec.x_renv = XV5 | XSEG | XLOCK | XEXEC;
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if ( outsect[ROMSG].os_base == 0x1880000 ) {
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/* Separate I/D */
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sep_id = 1;
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exec.x_renv |= XPURE | XSEP;
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if ( outsect[DATASG].os_base != outsect[ROMSG].os_base+
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outsect[ROMSG].os_size )
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fatal("data segment must follow rom\n") ;
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} else {
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if ( outsect[ROMSG].os_base != outsect[TEXTSG].os_base+
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outsect[TEXTSG].os_size )
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fatal("rom segment must follow text\n") ;
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if ( outsect[DATASG].os_base != outsect[ROMSG].os_base+
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outsect[ROMSG].os_size )
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fatal("data segment must follow rom\n") ;
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}
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if ( outhead.oh_nsect==NSECT ) {
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if ( outsect[LSECT].os_base != outsect[BSSSG].os_base+
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outsect[BSSSG].os_size )
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fatal("end segment must follow bss\n") ;
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if ( outsect[LSECT].os_size != 0 )
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fatal("end segment must be empty\n") ;
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}
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ext.xe_stksize = 0;
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ext.xe_segpos = 0140;
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ext.xe_segsize = (2 + sep_id) * 040;
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ext.xe_pagesize = 2;
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ext.xe_ostype = 1;
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ext.xe_osvers = 2;
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ext.xe_eseg = 077;
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seg[0].xs_type = XDATA;
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seg[0].xs_attr = XAMEM | X_ABSS | X_A32B;
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seg[0].xs_seg = 0107;
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seg[0].xs_filpos = 02000;
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seg[1].xs_type = XTSYMS;
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seg[1].xs_attr = 1; /* ??? */
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seg[1].xs_filpos = 02000 + outsect[TEXTSG].os_size +
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outsect[DATASG].os_size + outsect[ROMSG].os_size;
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if (sep_id) {
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seg[2] = seg[1];
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seg[2].xs_filpos = 02000 + align(outsect[TEXTSG].os_size,02000) +
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outsect[DATASG].os_size + outsect[ROMSG].os_size;
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seg[1] = seg[0];
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seg[1].xs_rbase = 0x1880000;
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seg[0].xs_type = XTEXT;
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seg[0].xs_attr = XAMEM | X_APURE | X_A32B;
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seg[0].xs_seg = 077;
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seg[0].xs_psize = seg[0].xs_vsize = outsect[TEXTSG].os_size;
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seg[1].xs_filpos = seg[0].xs_filpos + align(seg[0].xs_psize,02000);
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seg[1].xs_psize = outsect[ROMSG].os_size + outsect[DATASG].os_size;
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seg[1].xs_vsize = seg[1].xs_psize + outsect[BSSSG].os_size;
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}
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else {
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seg[0].xs_psize = outsect[TEXTSG].os_size +
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outsect[ROMSG].os_size +
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outsect[DATASG].os_size;
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seg[0].xs_vsize = seg[0].xs_psize + outsect[BSSSG].os_size;
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}
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lseek(output, seg[1+sep_id].xs_filpos, 0);
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if (! (exec.x_syms = seg[1+sep_id].xs_psize = emit_symtab())) {
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/* not enough memory to produce symbol table, do without */
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fprintf(stderr, "%s: warning: no symbol table produced\n",
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program);
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ext.xe_segsize -= 040;
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seg[1+sep_id].xs_type = 0;
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}
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lseek(output, seg[0].xs_filpos, 0);
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emits(&outsect[TEXTSG]) ;
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if (sep_id) {
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lseek(output, seg[1].xs_filpos, 0);
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}
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emits(&outsect[ROMSG]) ;
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emits(&outsect[DATASG]) ;
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lseek(output, 0L, 0);
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header();
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if ( outputfile_created ) chmod(argv[2],0755);
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exit(0);
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}
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#define shortcvt(val, p) (*p++ = val, *p++ = val >> 8)
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#define longcvt(val, p) (*p++ = val, *p++ = val >> 8, *p++ = val >> 16, *p++ = val >> 24)
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char buf[0300];
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header()
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{
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register char *p = buf;
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register int i;
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shortcvt(exec.x_magic, p);
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shortcvt(exec.x_ext, p);
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longcvt(exec.x_text, p);
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longcvt(exec.x_data, p);
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longcvt(exec.x_bss, p);
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longcvt(exec.x_syms, p);
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longcvt(exec.x_reloc, p);
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longcvt(exec.x_entry, p);
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*p++ = exec.x_cpu;
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*p++ = exec.x_relsym;
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shortcvt(exec.x_renv, p);
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longcvt(ext.xe_trsize, p);
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longcvt(ext.xe_drsize, p);
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longcvt(ext.xe_tbase, p);
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longcvt(ext.xe_dbase, p);
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longcvt(ext.xe_stksize, p);
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longcvt(ext.xe_segpos, p);
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longcvt(ext.xe_segsize, p);
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longcvt(ext.xe_mdtpos, p);
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longcvt(ext.xe_mdtsize, p);
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*p++ = ext.xe_mdttype;
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*p++ = ext.xe_pagesize;
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*p++ = ext.xe_ostype;
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*p++ = ext.xe_osvers;
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shortcvt(ext.xe_eseg, p);
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shortcvt(ext.xe_sres, p);
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p = &buf[0140];
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for (i = 0; i <= 2 && seg[i].xs_type != 0; i++) {
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shortcvt(seg[i].xs_type, p);
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shortcvt(seg[i].xs_attr, p);
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shortcvt(seg[i].xs_seg, p);
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shortcvt(seg[i].xs_sres, p);
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longcvt(seg[i].xs_filpos, p);
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longcvt(seg[i].xs_psize, p);
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longcvt(seg[i].xs_vsize, p);
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longcvt(seg[i].xs_rbase, p);
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longcvt(seg[i].xs_lres, p);
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longcvt(seg[i].xs_lres2, p);
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}
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write(output, buf, 0140 + i * 040);
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}
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/*
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* Transfer the emitted byted from one file to another.
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*/
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emits(section) struct outsect *section ; {
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register long n ;
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register int blk;
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char buffer[BUFSIZ];
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n= section->os_flen ;
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rd_outsect(section - outsect);
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while (n > 0) {
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blk = n > BUFSIZ ? BUFSIZ : n;
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rd_emit(buffer, (long) blk);
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write(output, buffer, blk);
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n -= blk;
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}
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if ((n = section->os_size - section->os_flen) > 0) {
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for (blk = BUFSIZ - 1; blk >= 0; blk--) {
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buffer[blk] = 0;
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}
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while (n > 0) {
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blk = n > BUFSIZ ? BUFSIZ : n;
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write(output, buffer, blk);
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n -= blk;
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}
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}
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}
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long
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emit_symtab()
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{
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register int i;
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struct xnm {
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unsigned short s_type, s_seg;
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long s_value;
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} xnm;
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char *chars, *xname;
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struct outname *names;
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register char *xptr;
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long off = OFF_CHAR(outhead);
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register char *p;
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register struct outname *np;
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chars = malloc((unsigned)(outhead.oh_nchar));
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if (! chars) return 0;
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np = names = (struct outname *)
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malloc(outhead.oh_nname * sizeof(struct outname));
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if (! np) {
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free(chars);
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return 0;
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}
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xptr = malloc((unsigned)(outhead.oh_nchar) + 9 * outhead.oh_nname);
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if (! xptr) {
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free(chars);
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free((char *) np);
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return 0;
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}
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xname = xptr;
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rd_name(np, outhead.oh_nname);
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rd_string(chars,outhead.oh_nchar);
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for (i = 0; i < outhead.oh_nname; i++, np++) {
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xnm.s_seg = 077;
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if (np->on_type & S_STB) {
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xnm.s_seg = np->on_desc;
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xnm.s_type = np->on_type;
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}
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else switch(np->on_type & S_ETC) {
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case S_FIL:
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case S_MOD:
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xnm.s_type = 0x1f;
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break;
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case S_SCT:
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xnm.s_type = 0x8;
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if ((np->on_type & S_TYP) != S_MIN+TEXTSG) {
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xnm.s_seg = 0107;
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}
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break;
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default:
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switch(np->on_type & S_TYP) {
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case S_UND:
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xnm.s_type = 0;
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break;
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case S_ABS:
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xnm.s_type = 1;
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xnm.s_seg = 0107;
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break;
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case S_MIN + TEXTSG:
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xnm.s_type = 2;
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break;
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case S_MIN + ROMSG:
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case S_MIN + DATASG:
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xnm.s_type = 3;
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xnm.s_seg = 0107;
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break;
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case S_MIN + BSSSG:
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case S_MIN + LSECT:
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xnm.s_type = 4;
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xnm.s_seg = 0107;
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break;
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default:
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fprintf(stderr,"warning: unknown s_type: %d\n",
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(int)(np->on_type) & S_TYP);
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}
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}
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if (np->on_type & S_EXT) xnm.s_type |= 0x20;
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xnm.s_value = np->on_valu;
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shortcvt(xnm.s_type, xptr);
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shortcvt(xnm.s_seg, xptr);
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longcvt(xnm.s_value, xptr);
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if (np->on_foff == 0) {
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*xptr++ = '\0';
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}
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else {
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long l = np->on_foff - off;
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if (l < 0 || l >= outhead.oh_nchar) {
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fatal("bad on_off: %ld\n",l);
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}
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p = &chars[l];
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do {
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*xptr++ = *p;
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} while (*p++);
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}
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}
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write(output, xname, xptr - xname);
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free(xname);
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free((char *) names);
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free(chars);
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return xptr - xname;
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}
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/* VARARGS1 */
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fatal(s, a1, a2)
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char *s;
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{
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fprintf(stderr,"%s: ",program) ;
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fprintf(stderr, s, a1, a2);
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if (outputfile_created)
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unlink(output_file);
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exit(1);
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}
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rd_fatal()
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{
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fatal("read error\n");
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}
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