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/* genbin.c - binary code generation routines for assembler */
#include "const.h"
#include "type.h"
#include "address.h"
#include "file.h"
#include "globvar.h"
PRIVATE char *asmbeg; /* beginning of assembler code */
/* for overwrite check */
/* bss-init to zero = NULL and not changed */
PRIVATE offset_t binfbuf; /* binary code buffer for file (counter) */
PRIVATE offset_t binmax; /* maximum value of binmbuf for pass 1 */
PRIVATE offset_t binmin; /* minimum value of binmbuf for pass 1 */
FORWARD void putbinoffset P((offset_t offset, count_t size));
/* write header to binary file */
PUBLIC void binheader()
{
if ((innum = binfil) != 0x0)
{
writec(0x0); /* binary header byte */
#ifdef LONG_BINHEADER
writeoff(binmax - binmin); /* program length */
writeoff(binfbuf = binmin); /* program start */
#else
writew((unsigned) (binmax - binmin)); /* program length */
writew((unsigned) (binfbuf = binmin)); /* program start */
#endif
}
}
/* write trailer to binary file */
PUBLIC void bintrailer()
{
if ((innum = binfil) != 0x0)
{
writec(0xFF); /* binary trailer byte */
writew(0x0); /* further trailer bytes */
#ifdef LONG_BINHEADER
writeoff(pedata & UNDBIT ? binmin : progent); /* entry point */
#else
writew(pedata & UNDBIT ? (unsigned) binmin : (unsigned) progent);
#endif
}
}
/* generate binary code for current line */
PUBLIC void genbin()
{
struct address_s *adrptr;
char *bufptr;
unsigned char remaining;
if (binaryg && mcount != 0x0)
{
if (popflags)
{
if (fcflag)
{
bufptr = databuf.fcbuf;
remaining = mcount;
do
putbin(*bufptr++);
while (--remaining != 0x0);
}
if (fdflag)
{
adrptr = databuf.fdbuf;
remaining = mcount;
do
{
putbinoffset(adrptr->offset, 0x2);
++adrptr;
}
while ((remaining -= 0x2) != 0x0);
}
#if SIZEOF_OFFSET_T > 0x2
if (fqflag)
{
adrptr = databuf.fqbuf;
remaining = mcount;
do
{
putbinoffset(adrptr->offset, 0x4);
++adrptr;
}
while ((remaining -= 0x4) != 0x0);
}
#endif
}
else
{
remaining = mcount - 0x1; /* count opcode immediately */
#ifdef I80386
if (aprefix != 0x0)
{
putbin(aprefix);
--remaining;
}
if (oprefix != 0x0)
{
putbin(oprefix);
--remaining;
}
if (sprefix != 0x0)
{
putbin(sprefix);
--remaining;
}
#endif
if (page != 0x0)
{
putbin(page);
--remaining;
}
putbin(opcode);
if (remaining != 0x0)
{
if (postb != 0x0)
{
putbin(postb);
--remaining;
}
#ifdef I80386
if (sib != NO_SIB)
{
putbin(sib);
--remaining;
}
#endif
if (remaining != 0x0)
putbinoffset(lastexp.offset, remaining);
}
#ifdef I80386
if (immcount != 0x0)
putbinoffset(immadr.offset, immcount);
#endif
}
/* else no code for this instruction, or already generated */
}
}
/* initialise private variables */
PUBLIC void initbin()
{
binmin = -1; /* greater than anything */
}
/* write char to binary file or directly to memory */
PUBLIC void putbin(ch)
opcode_pt ch;
{
if (binfil != 0x0)
{
if (!binaryc) /* pass 1, just record limits */
{
if (binmbuf < binmin)
binmin = binmbuf;
if (++binmbuf > binmax)
binmax = binmbuf;
}
else
{
if (binfbuf > binmbuf)
error(BWRAP); /* file buffer ahead of memory buffer */
else
{
innum = binfil;
while (binfbuf < binmbuf)
{
writec(0x0);/* pad with nulls if file buffer behind */
++binfbuf;
}
writec(ch);
binmbuf = ++binfbuf;
}
}
}
else if (binaryc && !(lcdata & UNDBIT))
/* memory output, and enabled */
{
register char *bufptr;
if ((bufptr = (char *) binmbuf) >= asmbeg && bufptr < heapptr)
error(OWRITE);
else
*bufptr = ch;
++binmbuf;
}
}
/* write sized offset to binary file or directly to memory */
PRIVATE void putbinoffset(offset, size)
offset_t offset;
count_t size;
{
char buf[sizeof offset];
#if SIZEOF_OFFSET_T > 0x2
u4cn(buf, offset, size);
#else
u2cn(buf, offset, size);
#endif
putbin(buf[0]);
if (size > 0x1)
putbin(buf[1]);
if (size > 0x2)
{
putbin(buf[2]);
putbin(buf[3]);
}
}
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