Mercurial > hg-old > index.cgi
diff lwlink/output.c @ 183:302b8db5fd89
modified lwlink to merge contiguous sections in the DECB output file to avoid the explosion of preambles
| author | lost |
|---|---|
| date | Sat, 21 Mar 2009 17:03:42 +0000 |
| parents | 106c2fe3c9d9 |
| children | 857cb407229e |
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--- a/lwlink/output.c Fri Mar 06 01:35:40 2009 +0000 +++ b/lwlink/output.c Sat Mar 21 17:03:42 2009 +0000 @@ -70,7 +70,8 @@ void do_output_decb(FILE *of) { - int sn; + int sn, sn2; + int cloc, olen; unsigned char buf[5]; for (sn = 0; sn < nsects; sn++) @@ -85,14 +86,40 @@ // don't generate output for a zero size section continue; } + + // calculate the length of this output block + cloc = sectlist[sn].ptr -> loadaddress; + olen = 0; + for (sn2 = sn; sn2 < nsects; sn2++) + { + // ignore BSS sections + if (sectlist[sn2].ptr -> flags & SECTION_BSS) + continue; + // ignore zero length sections + if (sectlist[sn2].ptr -> codesize == 0) + continue; + if (cloc != sectlist[sn2].ptr -> loadaddress) + break; + olen += sectlist[sn2].ptr -> codesize; + cloc += sectlist[sn2].ptr -> codesize; + } + // write a preamble buf[0] = 0x00; - buf[1] = sectlist[sn].ptr -> codesize >> 8; - buf[2] = sectlist[sn].ptr -> codesize & 0xff; + buf[1] = olen >> 8; + buf[2] = olen & 0xff; buf[3] = sectlist[sn].ptr -> loadaddress >> 8; buf[4] = sectlist[sn].ptr -> loadaddress & 0xff; writebytes(buf, 1, 5, of); - writebytes(sectlist[sn].ptr -> code, 1, sectlist[sn].ptr -> codesize, of); + for (; sn < sn2; sn++) + { + if (sectlist[sn].ptr -> flags & SECTION_BSS) + continue; + if (sectlist[sn].ptr -> codesize == 0) + continue; + writebytes(sectlist[sn].ptr -> code, 1, sectlist[sn].ptr -> codesize, of); + } + sn--; } // write a postamble buf[0] = 0xff;