NASM 0.98p3

1 files changed, 1457 insertions, 0 deletions

diff --git a/zoutieee.c b/zoutieee.c
new file mode 100644
index 0000000..b36098a
--- /dev/null
+++ b/zoutieee.c
@@ -0,0 +1,1457 @@
+/* outieee.c	output routines for the Netwide Assembler to produce
+ *		IEEE-std object files
+ *
+ * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
+ * Julian Hall. All rights reserved. The software is
+ * redistributable under the licence given in the file "Licence"
+ * distributed in the NASM archive.
+ */
+
+/* notes: I have tried to make this correspond to the IEEE version
+ * of the standard, specifically the primary ASCII version.  It should
+ * be trivial to create the binary version given this source (which is
+ * one of MANY things that have to be done to make this correspond to
+ * the hp-microtek version of the standard).
+ *
+ * 16-bit support is assumed to use 24-bit addresses
+ * The linker can sort out segmentation-specific stuff
+ * if it keeps track of externals
+ * in terms of being relative to section bases
+ *
+ * A non-standard variable type, the 'Yn' variable, has been introduced.
+ * Basically it is a reference to extern 'n'- denoting the low limit
+ * (L-variable) of the section that extern 'n' is defined in.  Like the
+ * x variable, there may be no explicit assignment to it, it is derived
+ * from the public definition corresponding to the extern name.  This
+ * is required because the one thing the mufom guys forgot to do well was
+ * take into account segmented architectures.
+ *
+ * I use comment classes for various things and these are undefined by
+ * the standard.
+ *
+ * Debug info should be considered totally non-standard (local labels are
+ * standard but linenum records are not covered by the standard.
+ * Type defs have the standard format but absolute meanings for ordinal
+ * types are not covered by the standard.)
+ *
+ * David Lindauer, LADsoft
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <stdarg.h>  /* Note: we need the ANSI version of stdarg.h */
+#include <ctype.h>
+
+#include "nasm.h"
+#include "nasmlib.h"
+#include "outform.h"
+
+#ifdef OF_IEEE
+
+#define ARRAY_BOT 0x1
+
+static char ieee_infile[FILENAME_MAX];
+static int ieee_uppercase;
+
+static efunc error;
+static ldfunc deflabel;
+static FILE *ofp;
+static int any_segs;
+static int arrindex;
+
+#define HUNKSIZE 1024		       /* Size of the data hunk */
+#define EXT_BLKSIZ 512
+#define LDPERLINE 32			/* bytes per line in output */
+
+struct ieeeSection;
+
+struct LineNumber {
+    struct LineNumber *next;
+    struct ieeeSection *segment;
+    long offset;
+    long lineno;
+};
+
+static struct FileName {
+    struct FileName *next;
+    char *name;
+    long index;
+} *fnhead, **fntail;
+
+static struct Array {
+    struct Array *next;
+    unsigned size;
+    int basetype;
+} *arrhead, **arrtail;
+
+static struct ieeePublic {
+    struct ieeePublic *next;
+    char *name;
+    long offset;
+    long segment;		       /* only if it's far-absolute */
+    long index;
+    int type;	 			/* for debug purposes */	
+} *fpubhead, **fpubtail, *last_defined;
+
+static struct ieeeExternal {
+    struct ieeeExternal *next;
+    char *name;
+    long commonsize;
+} *exthead, **exttail;
+
+static int externals;
+
+static struct ExtBack {
+    struct ExtBack *next;
+    int index[EXT_BLKSIZ];
+} *ebhead, **ebtail;
+
+/* NOTE: the first segment MUST be the lineno segment */
+static struct ieeeSection {
+    struct ieeeObjData *data,*datacurr;
+    struct ieeeSection *next;
+    struct ieeeFixupp *fptr, * flptr;
+    long index;			       /* the NASM segment id */
+    long ieee_index;		       /* the OBJ-file segment index */
+    long currentpos;
+    long align;			       /* can be SEG_ABS + absolute addr */
+    long startpos;
+    enum {
+	CMB_PRIVATE = 0,
+	CMB_PUBLIC = 2,
+	CMB_COMMON = 6
+    } combine;
+    long use32;			       /* is this segment 32-bit? */
+    struct ieeePublic *pubhead, **pubtail, *lochead, **loctail;
+    char *name;
+} *seghead, **segtail, *ieee_seg_needs_update;
+
+static struct ieeeObjData {
+    struct ieeeObjData *next;
+    unsigned char data[HUNKSIZE];
+};
+
+struct ieeeFixupp {
+    struct ieeeFixupp *next;
+    enum { 
+	FT_SEG = 0,
+	FT_REL = 1,
+	FT_OFS = 2,
+	FT_EXT = 3,
+	FT_WRT = 4,
+	FT_EXTREL = 5,
+	FT_EXTWRT = 6,
+	FT_EXTSEG = 7
+    } ftype;
+    short size;
+    long id1;
+    long id2;
+    long offset;
+    long addend;
+};
+		
+static long ieee_entry_seg, ieee_entry_ofs;
+static int checksum;
+
+extern struct ofmt of_ieee;
+
+static void ieee_data_new(struct ieeeSection *);
+static void ieee_write_fixup (long, long, struct ieeeSection *,
+				int, long, long);
+static void ieee_install_fixup(struct ieeeSection *, struct ieeeFixupp *);
+static long ieee_segment (char *, int, int *);
+static void ieee_write_file(int debuginfo);
+static void ieee_write_byte(struct ieeeSection *, int);
+static void ieee_write_word(struct ieeeSection *, int);
+static void ieee_write_dword(struct ieeeSection *, long);
+static void ieee_putascii(char *, ...);
+static void ieee_putcs(int);
+static long ieee_putld(long, long, unsigned char *);
+static long ieee_putlr(struct ieeeFixupp *);
+static void ieee_unqualified_name(char *, char *);
+
+
+/* 
+ * pup init 
+ */
+static void ieee_init (FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval) 
+{
+    (void) eval;
+    ofp = fp;
+    error = errfunc;
+    deflabel = ldef;
+    any_segs = FALSE;
+    fpubhead = NULL;
+    fpubtail = &fpubhead;
+    exthead = NULL;
+    exttail = &exthead;
+    externals = 1;
+    ebhead = NULL;
+    ebtail = &ebhead;
+    seghead = ieee_seg_needs_update = NULL;
+    segtail = &seghead;
+    ieee_entry_seg = NO_SEG;
+    ieee_uppercase = FALSE;
+    checksum = 0;
+    of_ieee.current_dfmt->init (&of_ieee,NULL,fp,errfunc);
+}
+static int ieee_set_info(enum geninfo type, char **val)
+{
+    (void) type;
+    (void) val;
+
+    return 0;
+}
+/*
+ * Rundown
+ */
+static void ieee_cleanup (int debuginfo) 
+{
+    ieee_write_file(debuginfo);
+    of_ieee.current_dfmt->cleanup ();
+    fclose (ofp);
+    while (seghead) {
+	struct ieeeSection *segtmp = seghead;
+	seghead = seghead->next;
+	while (segtmp->pubhead) {
+	    struct ieeePublic *pubtmp = segtmp->pubhead;
+	    segtmp->pubhead = pubtmp->next;
+	    nasm_free (pubtmp);
+	}
+	while (segtmp->fptr) {
+	    struct ieeeFixupp *fixtmp = segtmp->fptr;
+	    segtmp->fptr = fixtmp->next;
+	    nasm_free(fixtmp);
+	}
+	while (segtmp->data) {
+	    struct ieeeObjData *dattmp = segtmp->data;
+	    segtmp->data = dattmp->next;
+	    nasm_free(dattmp);
+	}
+	nasm_free (segtmp);
+    }
+    while (fpubhead) {
+	struct ieeePublic *pubtmp = fpubhead;
+	fpubhead = fpubhead->next;
+	nasm_free (pubtmp);
+    }
+    while (exthead) {
+	struct ieeeExternal *exttmp = exthead;
+	exthead = exthead->next;
+	nasm_free (exttmp);
+    }
+    while (ebhead) {
+	struct ExtBack *ebtmp = ebhead;
+	ebhead = ebhead->next;
+	nasm_free (ebtmp);
+    }
+}
+/*
+ * callback for labels
+ */
+static void ieee_deflabel (char *name, long segment,
+			  long offset, int is_global, char *special) {
+    /*
+     * We have three cases:
+     *
+     * (i) `segment' is a segment-base. If so, set the name field
+     * for the segment structure it refers to, and then
+     * return.
+     *
+     * (ii) `segment' is one of our segments, or a SEG_ABS segment.
+     * Save the label position for later output of a PUBDEF record.
+     * 
+     *
+     * (iii) `segment' is not one of our segments. Save the label
+     * position for later output of an EXTDEF.
+     */
+    struct ieeeExternal *ext;
+    struct ExtBack *eb;
+    struct ieeeSection *seg;
+    int i;
+
+    if (special) {
+        error(ERR_NONFATAL, "unrecognised symbol type `%s'", special);
+    }
+    /*
+     * First check for the double-period, signifying something
+     * unusual.
+     */
+    if (name[0] == '.' && name[1] == '.') {
+	if (!strcmp(name, "..start")) {
+	    ieee_entry_seg = segment;
+	    ieee_entry_ofs = offset;
+	}
+	return;
+    }
+
+    /*
+     * Case (i):
+     */
+    if (ieee_seg_needs_update) {
+	ieee_seg_needs_update->name = name;
+	return;
+    } 
+    if (segment < SEG_ABS && segment != NO_SEG && segment % 2)
+	return;
+
+    /*
+     * case (ii)
+     */
+    if (segment >= SEG_ABS) {
+	/*
+	 * SEG_ABS subcase of (ii).
+	 */
+	if (is_global) {
+	    struct ieeePublic *pub;
+
+	    pub = *fpubtail = nasm_malloc(sizeof(*pub));
+	    fpubtail = &pub->next;
+	    pub->next = NULL;
+	    pub->name = name;
+	    pub->offset = offset;
+	    pub->segment = segment & ~SEG_ABS;
+	}
+	return;
+    }
+
+    for (seg = seghead; seg && is_global; seg = seg->next)
+	if (seg->index == segment) {
+		struct ieeePublic *pub;
+
+	    last_defined = pub = *seg->pubtail = nasm_malloc(sizeof(*pub));
+	    seg->pubtail = &pub->next;
+	    pub->next = NULL;
+	    pub->name = name;
+	    pub->offset = offset;
+	    pub->index = seg->ieee_index;
+	    pub->segment = -1;
+	    return;
+	}
+
+    /*
+     * Case (iii).
+     */
+    if (is_global) {
+        ext = *exttail = nasm_malloc(sizeof(*ext));
+        ext->next = NULL;
+        exttail = &ext->next;
+        ext->name = name;
+        if (is_global == 2)
+	    ext->commonsize = offset;
+    	else
+	    ext->commonsize = 0;
+    	i = segment/2;
+    	eb = ebhead;
+    	if (!eb) {
+	    eb = *ebtail = nasm_malloc(sizeof(*eb));
+	    eb->next = NULL;
+	    ebtail = &eb->next;
+        }
+    	while (i > EXT_BLKSIZ) {
+	    if (eb && eb->next)
+	        eb = eb->next;
+	    else {
+	        eb = *ebtail = nasm_malloc(sizeof(*eb));
+	    	eb->next = NULL;
+	    	ebtail = &eb->next;
+	    }
+	    i -= EXT_BLKSIZ;
+    	}
+        eb->index[i] = externals++;
+    }
+	
+}
+
+/*
+ * Put data out
+ */
+static void ieee_out (long segto, void *data, unsigned long type,
+		     long segment, long wrt) {
+    long size, realtype;
+    unsigned char *ucdata;
+    long ldata;
+    struct ieeeSection *seg;
+
+    /*
+     * handle absolute-assembly (structure definitions)
+     */
+    if (segto == NO_SEG) {
+	if ((type & OUT_TYPMASK) != OUT_RESERVE)
+	    error (ERR_NONFATAL, "attempt to assemble code in [ABSOLUTE]"
+		   " space");
+	return;
+    }
+
+    /*
+     * If `any_segs' is still FALSE, we must define a default
+     * segment.
+     */
+    if (!any_segs) {
+	int tempint;		       /* ignored */
+	if (segto != ieee_segment("__NASMDEFSEG", 2, &tempint))
+	    error (ERR_PANIC, "strange segment conditions in IEEE driver");
+    }
+
+    /*
+     * Find the segment we are targetting.
+     */
+    for (seg = seghead; seg; seg = seg->next)
+	if (seg->index == segto)
+	    break;
+    if (!seg)
+	error (ERR_PANIC, "code directed to nonexistent segment?");
+
+    size = type & OUT_SIZMASK;
+    realtype = type & OUT_TYPMASK;
+    if (realtype == OUT_RAWDATA) {
+	ucdata = data;
+	while (size--)
+	    ieee_write_byte(seg,*ucdata++);
+    } else if (realtype == OUT_ADDRESS || realtype == OUT_REL2ADR ||
+	       realtype == OUT_REL4ADR) {
+	if (segment == NO_SEG && realtype != OUT_ADDRESS)
+	    error(ERR_NONFATAL, "relative call to absolute address not"
+		  " supported by IEEE format");
+	ldata = *(long *)data;
+	if (realtype == OUT_REL2ADR)
+	    ldata += (size-2);
+	if (realtype == OUT_REL4ADR)
+	    ldata += (size-4);
+	ieee_write_fixup (segment, wrt, seg, size, realtype,ldata);
+	if (size == 2)
+	    ieee_write_word (seg, ldata);
+	else
+	    ieee_write_dword (seg, ldata);
+    } 
+    else if (realtype == OUT_RESERVE) {
+	while (size--)
+	    ieee_write_byte(seg,0);
+    }
+}
+
+static void ieee_data_new(struct ieeeSection *segto) {
+    
+    if (!segto->data)
+	segto->data = segto->datacurr = nasm_malloc(sizeof(*(segto->datacurr)));
+    else
+	segto->datacurr = segto->datacurr->next = nasm_malloc(sizeof(*(segto->datacurr)));
+    segto->datacurr->next = NULL;
+}
+
+
+/*
+ * this routine is unalduterated bloatware.  I usually don't do this
+ * but I might as well see what it is like on a harmless program.
+ * If anyone wants to optimize this is a good canditate!
+ */
+static void ieee_write_fixup (long segment, long wrt, struct ieeeSection * segto,
+				int size, long realtype, long offset) {
+    struct ieeeSection *target;
+    struct ieeeFixupp s;
+
+    /* Don't put a fixup for things NASM can calculate */
+    if (wrt == NO_SEG && segment == NO_SEG)
+	return;
+
+    s.ftype = -1;
+    /* if it is a WRT offset */
+    if (wrt != NO_SEG) {
+	s.ftype = FT_WRT;
+	s.addend = offset;
+	if (wrt >= SEG_ABS)
+	    s.id1 = -(wrt-SEG_ABS);
+	else {
+	    if (wrt %2 && realtype != OUT_REL2ADR && realtype != OUT_REL4ADR) {
+		wrt--;
+
+	    	for (target = seghead; target; target = target->next)
+	            if (target->index == wrt)
+	            	break;
+    	        if (target) {
+	            s.id1 = target->ieee_index;
+	    	    for (target = seghead; target; target = target->next)
+	            	if (target->index == segment)
+	            	    break;
+		
+		    if (target) 
+		    	s.id2 = target->ieee_index;
+	            else {
+			/*
+			 * Now we assume the segment field is being used
+			 * to hold an extern index
+		 	 */
+			long i = segment/2;
+			struct ExtBack *eb = ebhead;
+			while (i > EXT_BLKSIZ) {
+			    if (eb)
+				eb = eb->next;
+			    else
+				break;
+			    i -= EXT_BLKSIZ;
+			}
+				/* if we have an extern decide the type and make a record
+			 */
+			if (eb) {
+			        s.ftype = FT_EXTWRT;
+			        s.addend = 0;
+		        	s.id2 = eb->index[i];
+			}
+			else
+			    error(ERR_NONFATAL,
+				"Source of WRT must be an offset");
+		    }
+			
+		}
+	    	else 
+	            error(ERR_PANIC,
+		          "unrecognised WRT value in ieee_write_fixup");
+	    }
+	    else 
+		error(ERR_NONFATAL,"target of WRT must be a section ");
+	}
+	s.size = size;
+	ieee_install_fixup(segto,&s);
+	return;
+    }
+    /* Pure segment fixup ? */
+    if (segment != NO_SEG) {
+	s.ftype = FT_SEG;
+	s.id1 = 0;
+	if (segment >= SEG_ABS) {
+	    /* absolute far segment fixup */
+	    s.id1 = -(segment -~SEG_ABS);
+	}
+	else if (segment % 2) {
+	    /* fixup to named segment */
+	    /* look it up */
+	    for (target = seghead; target; target = target->next)
+	        if (target->index == segment-1)
+	            break;
+    	    if (target)
+	        s.id1 = target->ieee_index;
+	    else {
+		/*
+		 * Now we assume the segment field is being used
+		 * to hold an extern index
+		 */
+		long i = segment/2;
+		struct ExtBack *eb = ebhead;
+		while (i > EXT_BLKSIZ) {
+		    if (eb)
+			eb = eb->next;
+		    else
+			break;
+		    i -= EXT_BLKSIZ;
+		}
+		/* if we have an extern decide the type and make a record
+		 */
+		if (eb) {
+		    if (realtype == OUT_REL2ADR || realtype == OUT_REL4ADR) {
+			error(ERR_PANIC,"Segment of a rel not supported in ieee_write_fixup");
+		    }
+		    else {
+				/* If we want the segment */
+			    s.ftype = FT_EXTSEG;
+			    s.addend = 0;
+			    s.id1 = eb->index[i];
+		    }
+		    
+		}
+		else 
+		    /* If we get here the seg value doesn't make sense */
+	            error(ERR_PANIC,
+		          "unrecognised segment value in ieee_write_fixup");
+	    }
+
+        } else {
+	    /* Assume we are offsetting directly from a section
+    	     * So look up the target segment
+	     */
+	    for (target = seghead; target; target = target->next)
+	        if (target->index == segment)
+	            break;
+    	    if (target) {
+		if (realtype == OUT_REL2ADR || realtype == OUT_REL4ADR) {
+		    /* PC rel to a known offset */
+	            s.id1 = target->ieee_index;
+		    s.ftype = FT_REL;
+		    s.size = size;
+		    s.addend = offset;
+		}
+		else {
+		    /* We were offsetting from a seg */
+	            s.id1 = target->ieee_index;
+		    s.ftype = FT_OFS;
+		    s.size = size;
+		    s.addend = offset;
+		}
+	    }
+	    else {
+		/*
+		 * Now we assume the segment field is being used
+		 * to hold an extern index
+		 */
+		long i = segment/2;
+		struct ExtBack *eb = ebhead;
+		while (i > EXT_BLKSIZ) {
+		    if (eb)
+			eb = eb->next;
+		    else
+			break;
+		    i -= EXT_BLKSIZ;
+		}
+		/* if we have an extern decide the type and make a record
+		 */
+		if (eb) {
+		    if (realtype == OUT_REL2ADR || realtype == OUT_REL4ADR) {
+		        s.ftype = FT_EXTREL;
+		        s.addend = 0;
+		        s.id1 = eb->index[i];
+		    }
+		    else {
+			    /* else we want the external offset */
+			    s.ftype = FT_EXT;
+			    s.addend = 0;
+			    s.id1 = eb->index[i];
+		    }
+		    
+		}
+		else 
+		    /* If we get here the seg value doesn't make sense */
+	            error(ERR_PANIC,
+		          "unrecognised segment value in ieee_write_fixup");
+	    }
+	}
+	if (size != 2 && s.ftype == FT_SEG)
+	    error(ERR_NONFATAL, "IEEE format can only handle 2-byte"
+		     " segment base references");
+	s.size = size;
+	ieee_install_fixup(segto,&s);
+	return;
+    }
+    /* should never get here */
+}
+static void ieee_install_fixup(struct ieeeSection *seg, struct ieeeFixupp *fix)
+{
+    struct ieeeFixupp *f;
+    f = nasm_malloc(sizeof(struct ieeeFixupp));
+    memcpy(f,fix,sizeof(struct ieeeFixupp));
+    f->offset = seg->currentpos;
+    seg->currentpos += fix->size;
+    f->next = NULL;
+    if (seg->fptr)
+	seg->flptr = seg->flptr->next = f;
+    else
+	seg->fptr = seg->flptr = f;
+
+}
+
+/*
+ * segment registry
+ */
+static long ieee_segment (char *name, int pass, int *bits) {
+    /*
+     * We call the label manager here to define a name for the new
+     * segment, and when our _own_ label-definition stub gets
+     * called in return, it should register the new segment name
+     * using the pointer it gets passed. That way we save memory,
+     * by sponging off the label manager.
+     */
+    if (!name) {
+	*bits = 16;
+	if (!any_segs)
+		return 0;
+	return seghead->index;
+    } else {
+	struct ieeeSection *seg;
+	int ieee_idx, attrs, rn_error;
+	char *p;
+
+	/*
+	 * Look for segment attributes.
+	 */
+	attrs = 0;
+	while (*name == '.')
+	    name++;		       /* hack, but a documented one */
+	p = name;
+	while (*p && !isspace(*p))
+	    p++;
+	if (*p) {
+	    *p++ = '\0';
+	    while (*p && isspace(*p))
+		*p++ = '\0';
+	}
+	while (*p) {
+	    while (*p && !isspace(*p))
+		p++;
+	    if (*p) {
+		*p++ = '\0';
+		while (*p && isspace(*p))
+		    *p++ = '\0';
+	    }
+
+	    attrs++;
+	}
+
+	ieee_idx = 1;
+	for (seg = seghead; seg; seg = seg->next) {
+	    ieee_idx++;
+	    if (!strcmp(seg->name, name)) {
+		if (attrs > 0 && pass == 1)
+		    error(ERR_WARNING, "segment attributes specified on"
+			  " redeclaration of segment: ignoring");
+		if (seg->use32)
+		    *bits = 32;
+		else
+		    *bits = 16;
+		return seg->index;
+	    }
+	}
+
+	*segtail = seg = nasm_malloc(sizeof(*seg));
+	seg->next = NULL;
+	segtail = &seg->next;
+	seg->index = seg_alloc();
+	seg->ieee_index = ieee_idx;
+	any_segs = TRUE;
+	seg->name = NULL;
+	seg->currentpos = 0;
+	seg->align = 1;		       /* default */
+	seg->use32 = *bits == 32;      /* default to user spec */
+	seg->combine = CMB_PUBLIC;     /* default */
+	seg->pubhead = NULL;
+	seg->pubtail = &seg->pubhead;
+	seg->data = NULL;
+	seg->fptr = NULL;
+	seg->lochead = NULL;
+	seg->loctail = &seg->lochead;
+
+	/*
+	 * Process the segment attributes.
+	 */
+	p = name;
+	while (attrs--) {
+	    p += strlen(p);
+	    while (!*p) p++;
+
+	    /*
+	     * `p' contains a segment attribute.
+	     */
+	    if (!nasm_stricmp(p, "private"))
+		seg->combine = CMB_PRIVATE;
+	    else if (!nasm_stricmp(p, "public"))
+		seg->combine = CMB_PUBLIC;
+	    else if (!nasm_stricmp(p, "common"))
+		seg->combine = CMB_COMMON;
+	    else if (!nasm_stricmp(p, "use16"))
+		seg->use32 = FALSE;
+	    else if (!nasm_stricmp(p, "use32"))
+		seg->use32 = TRUE;
+	    else if (!nasm_strnicmp(p, "align=", 6)) {
+		seg->align = readnum(p+6, &rn_error);
+		if (seg->align == 0)
+		    seg->align = 1;
+		if (rn_error) {
+		    seg->align = 1;
+		    error (ERR_NONFATAL, "segment alignment should be"
+			   " numeric");
+		}
+		switch ((int) seg->align) {
+		  case 1:	       /* BYTE */
+		  case 2:	       /* WORD */
+		  case 4:	       /* DWORD */
+		  case 16:	       /* PARA */
+		  case 256:	       /* PAGE */
+		  case 8:
+		  case 32:
+		  case 64:
+		  case 128:
+		    break;
+		  default:
+		    error(ERR_NONFATAL, "invalid alignment value %d",
+			  seg->align);
+		    seg->align = 1;
+		    break;
+		}
+	    } else if (!nasm_strnicmp(p, "absolute=", 9)) {
+		seg->align = SEG_ABS + readnum(p+9, &rn_error);
+		if (rn_error)
+		    error (ERR_NONFATAL, "argument to `absolute' segment"
+			   " attribute should be numeric");
+	    }
+	}
+
+	ieee_seg_needs_update = seg;
+	if (seg->align >= SEG_ABS)
+	    deflabel (name, NO_SEG, seg->align - SEG_ABS, 
+			NULL, FALSE, FALSE, &of_ieee, error);
+	else
+	    deflabel (name, seg->index+1, 0L, 
+			NULL, FALSE, FALSE, &of_ieee, error);
+	ieee_seg_needs_update = NULL;
+
+	if (seg->use32)
+	    *bits = 32;
+	else
+	    *bits = 16;
+	return seg->index;
+    }
+}
+/*
+ * directives supported
+ */
+static int ieee_directive (char *directive, char *value, int pass) 
+{
+    
+    (void) value;
+    (void) pass;
+    if (!strcmp(directive, "uppercase")) {
+	ieee_uppercase = TRUE;
+	return 1;
+    }
+    return 0;
+}
+/*
+ * Return segment data
+ */
+static long ieee_segbase (long segment) 
+{
+    struct ieeeSection *seg;
+
+    /*
+     * Find the segment in our list.
+     */
+    for (seg = seghead; seg; seg = seg->next)
+	if (seg->index == segment-1)
+	    break;
+
+    if (!seg)
+	return segment;		       /* not one of ours - leave it alone */
+
+    if (seg->align >= SEG_ABS)
+	return seg->align;	       /* absolute segment */
+
+    return segment;		       /* no special treatment */
+}
+/*
+ * filename
+ */
+static void ieee_filename (char *inname, char *outname, efunc error) {
+    strcpy(ieee_infile, inname);
+    standard_extension (inname, outname, ".o", error);
+}
+
+static void ieee_write_file (int debuginfo) {
+    struct tm *thetime;
+    time_t reltime;
+    struct FileName *fn;
+    struct ieeeSection *seg;
+    struct ieeePublic *pub, *loc;
+    struct ieeeExternal *ext;
+    struct ieeeObjData *data;
+    struct ieeeFixupp *fix;
+    struct Array *arr;
+    static char boast[] = "The Netwide Assembler " NASM_VER;
+    int i;
+
+    /*
+     * Write the module header
+     */
+    ieee_putascii("MBFNASM,%02X%s.\r\n",strlen(ieee_infile),ieee_infile);
+
+    /*
+     * Write the NASM boast comment.
+     */
+    ieee_putascii("CO0,%02X%s.\r\n",strlen(boast),boast);
+
+    /* 
+     * write processor-specific information
+     */
+    ieee_putascii("AD8,4,L.\r\n");
+
+    /*
+     * date and time
+     */
+    time(&reltime);
+    thetime = localtime(&reltime);
+    ieee_putascii("DT%04d%02d%02d%02d%02d%02d.\r\n", 
+			1900+thetime->tm_year,thetime->tm_mon+1,thetime->tm_mday,
+			thetime->tm_hour, thetime->tm_min, thetime->tm_sec);
+    /* 
+     * if debugging, dump file names
+     */
+    for (fn = fnhead; fn && debuginfo; fn = fn->next) {
+	ieee_putascii("C0105,%02X%s.\r\n",strlen(fn->name),fn->name);
+    }
+     
+    ieee_putascii("CO101,07ENDHEAD.\r\n");
+    /*
+     * the standard doesn't specify when to put checksums,
+     * we'll just do it periodically.
+     */
+    ieee_putcs(FALSE);
+
+    /* 
+     * Write the section headers
+     */
+    seg = seghead;
+    if (!debuginfo && !strcmp(seg->name,"??LINE"))
+	seg = seg->next;
+    while (seg) {
+	char buf[256];
+	char attrib;
+	switch(seg->combine) {
+	    case CMB_PUBLIC:
+	    default:
+		attrib = 'C';
+		break;
+	    case CMB_PRIVATE:
+		attrib = 'S';
+		break;
+	    case CMB_COMMON:
+		attrib = 'M';
+		break;
+  	}
+	ieee_unqualified_name(buf,seg->name);
+	if (seg->align >= SEG_ABS) {
+	    ieee_putascii("ST%X,A,%02X%s.\r\n",seg->ieee_index,strlen(buf), buf);
+	    ieee_putascii("ASL%X,%lX.\r\n",seg->ieee_index, (seg->align - SEG_ABS)*16);
+	}
+	else {
+	    ieee_putascii("ST%X,%c,%02X%s.\r\n",seg->ieee_index,attrib,strlen(buf), buf);
+	    ieee_putascii("SA%X,%lX.\r\n",seg->ieee_index,seg->align);
+	    ieee_putascii("ASS%X,%X.\r\n",seg->ieee_index, seg->currentpos);
+	}
+	seg = seg->next;
+    }
+    /*
+     * write the start address if there is one
+     */
+    if (ieee_entry_seg) {
+        for (seg = seghead; seg; seg = seg->next)
+	    if (seg->index == ieee_entry_seg)
+		break;
+	if (!seg)
+	    error(ERR_PANIC,"Start address records are incorrect");
+	else 
+	    ieee_putascii("ASG,R%X,%lX,+.\r\n",seg->ieee_index, ieee_entry_ofs);
+    }	
+
+
+    ieee_putcs(FALSE);
+    /*
+     * Write the publics
+     */
+    i = 1;
+    for (seg = seghead; seg; seg = seg->next) {
+        for (pub = seg->pubhead; pub; pub = pub->next) {
+	    char buf[256];
+	    ieee_unqualified_name(buf,pub->name);
+       	    ieee_putascii("NI%X,%02X%s.\r\n",i, strlen(buf), buf);
+	    if (pub->segment == -1)  
+       	    	ieee_putascii("ASI%X,R%X,%lX,+.\r\n", i, pub->index,pub->offset);
+	    else
+       	    	ieee_putascii("ASI%X,%lX,%lX,+.\r\n", i, pub->segment*16,pub->offset);
+	    if (debuginfo)
+	    	if (pub->type >= 0x100)
+	    	    ieee_putascii("ATI%X,T%X.\r\n", i, pub->type - 0x100);
+		else
+	    	    ieee_putascii("ATI%X,%X.\r\n", i, pub->type);
+ 	    i++;
+        }
+    }
+    pub = fpubhead;
+    i = 1;
+    while (pub) {
+	char buf[256];
+	ieee_unqualified_name(buf,pub->name);
+       	ieee_putascii("NI%X,%02X%s.\r\n",i, strlen(buf), buf);
+	if (pub->segment == -1)  
+       	    ieee_putascii("ASI%X,R%X,%lX,+.\r\n", i, pub->index,pub->offset);
+	else
+       	    ieee_putascii("ASI%X,%lX,%lX,+.\r\n", i, pub->segment*16,pub->offset);
+	if (debuginfo)
+	    if (pub->type >= 0x100)
+	    	ieee_putascii("ATI%X,T%X.\r\n", i, pub->type - 0x100);
+	    else
+	    	ieee_putascii("ATI%X,%X.\r\n", i, pub->type);
+ 	i++;
+        pub = pub->next;
+    }
+    /*
+     * Write the externals
+     */
+    ext = exthead;
+    i = 1;
+    while (ext) {
+	char buf[256];
+	ieee_unqualified_name(buf,ext->name);
+       	ieee_putascii("NX%X,%02X%s.\r\n",i++, strlen(buf), buf);
+        ext = ext->next;
+    }
+    ieee_putcs(FALSE);
+
+    /*
+     * IEEE doesn't have a standard pass break record
+     * so use the ladsoft variant
+     */
+    ieee_putascii("CO100,06ENDSYM.\r\n");
+
+    /*
+     * now put types
+     */
+    i = ARRAY_BOT;
+    for (arr = arrhead; arr && debuginfo; arr = arr->next) {
+	ieee_putascii("TY%X,20,%X,%lX.\r\n",i++,arr->basetype,arr->size);
+    }
+    /*
+     * now put locals
+     */
+    i = 1;
+    for (seg = seghead; seg && debuginfo; seg = seg->next) {
+        for (loc = seg->lochead; loc; loc = loc->next) {
+	    char buf[256];
+	    ieee_unqualified_name(buf,loc->name);
+       	    ieee_putascii("NN%X,%02X%s.\r\n",i, strlen(buf), buf);
+	    if (loc->segment == -1)  
+       	    	ieee_putascii("ASN%X,R%X,%lX,+.\r\n", i, loc->index,loc->offset);
+	    else
+       	    	ieee_putascii("ASN%X,%lX,%lX,+.\r\n", i, loc->segment*16,loc->offset);
+	    if (debuginfo)
+		if (loc->type >= 0x100)
+	 	    ieee_putascii("ATN%X,T%X.\r\n", i, loc->type - 0x100);
+		else
+	    	    ieee_putascii("ATN%X,%X.\r\n", i, loc->type);
+ 	    i++;
+        }
+    }
+
+    /*
+     *  put out section data;
+     */ 
+    seg = seghead;
+    if (!debuginfo && !strcmp(seg->name,"??LINE"))
+	seg = seg->next;
+    while (seg) {
+	if (seg->currentpos) {
+	    long size,org = 0;
+	    data = seg->data;
+	    ieee_putascii("SB%X.\r\n",seg->ieee_index);
+	    fix = seg->fptr;
+	    while (fix) {
+		size = HUNKSIZE - (org %HUNKSIZE);
+		size = size +org > seg->currentpos ? seg->currentpos-org : size;
+		size = fix->offset - org > size ? size : fix->offset-org;
+		org = ieee_putld(org,org+size,data->data);
+		if (org % HUNKSIZE == 0)
+		    data = data->next;
+		if (org == fix->offset) {
+		    org += ieee_putlr(fix);
+		    fix = fix->next;
+		}
+	    }
+	    while (org < seg->currentpos && data) {
+		size = seg->currentpos-org > HUNKSIZE ? HUNKSIZE : seg->currentpos - org;
+		org = ieee_putld(org,org+size,data->data);
+		data = data->next;
+	    }
+	    ieee_putcs(FALSE);
+		
+	}
+	seg = seg->next;
+    }
+    /*
+     * module end record
+     */
+    ieee_putascii("ME.\r\n");
+}
+
+static void ieee_write_byte(struct ieeeSection *seg, int data) {
+    int temp;
+    if (!(temp = seg->currentpos++ % HUNKSIZE))
+	ieee_data_new(seg);
+    seg->datacurr->data[temp] = data;
+}
+
+static void ieee_write_word(struct ieeeSection *seg, int data) {
+    ieee_write_byte(seg, data & 0xFF);
+    ieee_write_byte(seg,(data >> 8) & 0xFF);
+}
+
+static void ieee_write_dword(struct ieeeSection *seg, long data) {
+    ieee_write_byte(seg, data & 0xFF);
+    ieee_write_byte(seg,(data >> 8) & 0xFF);
+    ieee_write_byte(seg,(data >> 16) & 0xFF);
+    ieee_write_byte(seg,(data >> 24) & 0xFF);
+}
+static void ieee_putascii(char *format, ...)
+{
+	char buffer[256];
+	int i,l;
+	va_list ap;
+
+	va_start(ap, format);
+	vsprintf(buffer, format, ap);
+	l = strlen(buffer);
+	for (i=0; i < l; i++)
+		if ((buffer[i] & 0xff) > 31)
+			checksum+=buffer[i];
+	va_end(ap);
+	fprintf(ofp,buffer);
+}
+
+/*
+ * put out a checksum record */
+static void ieee_putcs(int toclear)
+{
+	if (toclear) {
+		ieee_putascii("CS.\r\n");
+	}
+	else {
+		checksum += 'C';
+		checksum += 'S';
+		ieee_putascii("CS%02X.\r\n",checksum & 127);
+	}
+	checksum = 0;
+}
+
+static long ieee_putld(long start, long end, unsigned char *buf)
+{
+	long val;
+	if (start == end)
+		return(start);
+	val = start % HUNKSIZE;
+	/* fill up multiple lines */
+	while (end - start >= LDPERLINE) {
+		int i;
+		ieee_putascii("LD");
+		for (i=0; i < LDPERLINE; i++) {
+			ieee_putascii("%02X",buf[val++]);
+			start++;
+		}
+		ieee_putascii(".\r\n");
+	}
+	/* if no partial lines */
+	if (start == end)
+		return(start);
+	/* make a partial line */
+	ieee_putascii("LD");
+	while (start < end) {
+		ieee_putascii("%02X",buf[val++]);
+		start++;
+	}
+	ieee_putascii(".\r\n");
+	return(start);
+}
+static long ieee_putlr(struct ieeeFixupp *p)
+{
+/*
+ * To deal with the vagaries of segmentation the LADsoft linker
+ * defines two types of segments: absolute and virtual.  Note that
+ * 'absolute' in this context is a different thing from the IEEE
+ * definition of an absolute segment type, which is also supported. If a
+ * sement is linked in virtual mode the low limit (L-var) is
+ * subtracted from each R,X, and P variable which appears in an
+ * expression, so that we can have relative offsets.  Meanwhile
+ * in the ABSOLUTE mode this subtraction is not done and
+ * so we can use absolute offsets from 0.  In the LADsoft linker
+ * this configuration is not done in the assemblker source but in
+ * a source the linker reads.  Generally this type of thing only
+ * becomes an issue if real mode code is used.  A pure 32-bit linker could
+ * get away without defining the virtual mode...
+ */
+	char buf[40];
+	long size=p->size;
+	switch(p->ftype) {
+	    case FT_SEG:
+	        if (p->id1 < 0)
+		    sprintf(buf,"%lX",-p->id1);
+		else
+		    sprintf(buf,"L%X,10,/",p->id1);
+		break;
+	    case FT_OFS:
+		sprintf(buf,"R%X,%lX,+",p->id1,p->addend);
+		break;
+	    case FT_REL:
+		sprintf(buf,"R%X,%lX,+,P,-,%X,-",p->id1,p->addend,p->size);
+		break;
+		
+	    case FT_WRT:
+	        if (p->id2 < 0)
+		    sprintf(buf,"R%X,%lX,+,L%X,+,%lX,-",p->id2,p->addend,p->id2,-p->id1*16);
+		else
+		    sprintf(buf,"R%X,%lX,+,L%X,+,L%X,-",p->id2,p->addend,p->id2,p->id1);
+		break;
+	    case FT_EXT:
+		sprintf(buf,"X%X",p->id1,p->id1);
+		break;
+	    case FT_EXTREL:
+		sprintf(buf,"X%X,P,-,%X,-",p->id1,size);
+		break;
+	    case FT_EXTSEG:
+		/* We needed a non-ieee hack here.
+		 * We introduce the Y variable, which is the low
+		 * limit of the native segment the extern resides in
+		 */
+		sprintf(buf,"Y%X,10,/",p->id1);
+		break;
+	    case FT_EXTWRT:
+	        if (p->id2 < 0)
+		    sprintf(buf,"X%X,Y%X,+,%lX,-",p->id2,p->id2,-p->id1*16);
+		else
+		    sprintf(buf,"X%X,Y%X,+,L%X,-",p->id2,p->id2,p->id1);
+		break;
+	}
+	ieee_putascii("LR(%s,%lX).\r\n", buf, size);
+
+	return(size);
+}
+/* Dump all segment data (text and fixups )*/
+
+static void ieee_unqualified_name(char *dest, char *source)
+{
+    if (ieee_uppercase) {
+	while (*source)
+	    *dest++ = toupper(*source++);
+        *dest = 0;
+    }
+    else strcpy(dest,source);
+}
+void dbgls_init(struct ofmt * of, void * id, FILE * fp, efunc error)
+{
+    int tempint;
+    (void) of;
+    (void) id;
+    (void) fp;
+    (void) error;
+
+    fnhead = NULL;
+    fntail = &fnhead;
+    arrindex = ARRAY_BOT ;
+    arrhead = NULL;
+    arrtail = &arrhead;
+    ieee_segment("??LINE", 2, &tempint);
+    any_segs = FALSE;
+}
+static void dbgls_cleanup(void)
+{
+    struct ieeeSection *segtmp;
+    while (fnhead) {
+	struct FileName *fntemp = fnhead;
+	fnhead = fnhead->next;
+	nasm_free (fntemp->name);
+	nasm_free (fntemp);
+    }
+    for (segtmp = seghead; segtmp; segtmp = segtmp->next) {
+	while (segtmp->lochead) {
+	    struct ieeePublic *loctmp = segtmp->lochead;
+	    segtmp->lochead = loctmp->next;
+	    nasm_free (loctmp->name);
+	    nasm_free (loctmp);
+	}
+    }
+    while (arrhead) {
+	struct Array *arrtmp = arrhead;
+        arrhead = arrhead->next;
+        nasm_free (arrtmp);
+    }
+}
+
+/*
+ * because this routine is not bracketed in
+ * the main program, this routine will be called even if there
+ * is no request for debug info
+ * so, we have to make sure the ??LINE segment is avaialbe
+ * as the first segment when this debug format is selected
+ */
+static void dbgls_linnum (const char *lnfname, long lineno, long segto)
+{
+    struct FileName *fn;
+    struct ieeeSection *seg;
+    int i = 0;
+    if (segto == NO_SEG)
+	return;
+
+    /*
+     * If `any_segs' is still FALSE, we must define a default
+     * segment.
+     */
+    if (!any_segs) {
+	int tempint;		       /* ignored */
+	if (segto != ieee_segment("__NASMDEFSEG", 2, &tempint))
+	    error (ERR_PANIC, "strange segment conditions in OBJ driver");
+    }
+
+    /*
+     * Find the segment we are targetting.
+     */
+    for (seg = seghead; seg; seg = seg->next)
+	if (seg->index == segto)
+	    break;
+    if (!seg)
+	error (ERR_PANIC, "lineno directed to nonexistent segment?");
+
+    for (fn = fnhead; fn; fn = fnhead->next) {
+	if (!nasm_stricmp(lnfname,fn->name))
+	    break;
+        i++;
+    }
+    if (!fn) {
+	fn = nasm_malloc ( sizeof( *fn));
+	fn->name = nasm_malloc ( strlen(lnfname) + 1) ;
+	fn->index = i;
+        strcpy (fn->name,lnfname);
+	fn->next = NULL;
+	*fntail = fn;
+	fntail = &fn->next;
+    }
+    ieee_write_byte(seghead, fn->index);
+    ieee_write_word(seghead, lineno);
+    ieee_write_fixup (segto, NO_SEG, seghead, 4,OUT_ADDRESS,seg->currentpos);
+
+}
+static void dbgls_deflabel (char *name, long segment,
+			  long offset, int is_global, char *special) 
+{
+    struct ieeeSection *seg;
+    int used_special = FALSE;	       /* have we used the special text? */
+
+    (void) special;
+
+    /*
+     * If it's a special-retry from pass two, discard it.
+     */
+    if (is_global == 3)
+	return;
+
+    /*
+     * First check for the double-period, signifying something
+     * unusual.
+     */
+    if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
+	return;
+    }
+
+    /*
+     * Case (i):
+     */
+    if (ieee_seg_needs_update)
+	return;
+    if (segment < SEG_ABS && segment != NO_SEG && segment % 2)
+	return;
+
+    if (segment >= SEG_ABS || segment == NO_SEG) {
+	return;
+    }
+
+    /*
+     * If `any_segs' is still FALSE, we might need to define a
+     * default segment, if they're trying to declare a label in
+     * `first_seg'.  But the label should exist due to a prior
+     * call to ieee_deflabel so we can skip that.
+     */
+
+    for (seg = seghead; seg; seg = seg->next)
+	if (seg->index == segment) {
+	    struct ieeePublic *loc;
+	    /*
+	     * Case (ii). Maybe MODPUB someday?
+	     */
+	    if (!is_global) {
+	    	last_defined = loc  = nasm_malloc (sizeof(*loc));
+	    	*seg->loctail = loc;
+	    	seg->loctail = &loc->next;
+	    	loc->next = NULL;
+	    	loc->name = nasm_strdup(name);
+	    	loc->offset = offset;
+		loc->segment = -1;
+		loc->index = seg->ieee_index;
+	    }
+	}
+}
+static void dbgls_typevalue (long type)
+{
+    int elem = TYM_ELEMENTS(type);
+    type = TYM_TYPE(type);
+
+    if (! last_defined)
+	return;
+
+    switch (type) {
+	case TY_BYTE:
+	    last_defined->type = 1; /* unsigned char */
+	    break;
+	case TY_WORD:
+	    last_defined->type = 3; /* unsigned word */
+	    break;
+	case TY_DWORD:
+	    last_defined->type = 5; /* unsigned dword */
+	    break;
+	case TY_FLOAT:
+	    last_defined->type = 9; /* float */
+	    break;
+	case TY_QWORD:
+	    last_defined->type = 10; /* qword */
+	    break;
+	case TY_TBYTE:
+	    last_defined->type = 11; /* TBYTE */
+	    break;
+	default:
+	    last_defined->type = 0x10; /* near label */
+	    break;
+    }
+               
+    if (elem > 1) {
+        struct Array *arrtmp = nasm_malloc (sizeof(*arrtmp));
+        int vtype = last_defined->type;
+        arrtmp->size = elem;
+        arrtmp->basetype = vtype;
+        arrtmp->next = NULL;
+        last_defined->type = arrindex++ + 0x100;
+        *arrtail = arrtmp;
+        arrtail = & (arrtmp->next);
+    }
+    last_defined = NULL;
+}
+static void dbgls_output (int output_type, void *param)
+{
+    (void) output_type;
+    (void) param;
+}
+static struct dfmt ladsoft_debug_form = {
+    "LADsoft Debug Records",
+    "ladsoft",
+    dbgls_init,
+    dbgls_linnum,
+    dbgls_deflabel,
+    null_debug_routine,
+    dbgls_typevalue,
+    dbgls_output,
+    dbgls_cleanup,
+};
+static struct dfmt *ladsoft_debug_arr[3] = {
+	&ladsoft_debug_form,
+	&null_debug_form,
+	NULL
+};
+struct ofmt of_ieee = {
+    "IEEE-695 (LADsoft variant) object file format",
+    "ieee",
+    NULL,
+    ladsoft_debug_arr,
+    &null_debug_form,
+    NULL,
+    ieee_init,
+    ieee_set_info,
+    ieee_out,
+    ieee_deflabel,
+    ieee_segment,
+    ieee_segbase,
+    ieee_directive,
+    ieee_filename,
+    ieee_cleanup
+};
+
+#endif /* OF_IEEE */