From 74086566306996af8a2ea6224cd2406e5be034f8 Mon Sep 17 00:00:00 2001 From: Gene Cumm Date: Sat, 31 Jul 2010 23:14:06 -0400 Subject: [PATCH] chain.c32: prepare for loading DRMK --- com32/modules/chain.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/com32/modules/chain.c b/com32/modules/chain.c index a5f6401..c32da11 100644 --- a/com32/modules/chain.c +++ b/com32/modules/chain.c @@ -133,6 +133,7 @@ static struct options { bool swap; bool hide; bool sethidden; + bool drmk; } opt; struct data_area { @@ -1351,6 +1352,11 @@ int main(int argc, char *argv[]) opt.seg = 0x70; /* MS-DOS 2.0+ wants this address */ opt.loadfile = argv[i] + 6; opt.sethidden = true; + } else if (!strncmp(argv[i], "drmk=", 5)) { + opt.seg = 0x70; /* DRMK wants this address */ + opt.loadfile = argv[i] + 6; + opt.sethidden = true; + opt.drmk = true; } else if (!strncmp(argv[i], "grub=", 5)) { opt.seg = 0x800; /* stage2 wants this address */ opt.loadfile = argv[i] + 5; @@ -1697,6 +1703,31 @@ int main(int argc, char *argv[]) } } + if (opt.drmk) { + /* DRMK entry is different */ + /* + * A new size, aligned to 16 bytes, with one full extra row to + * guarantee the needed space and ease other values. + */ + int tsize = (data[ndata].size + 31) & 0xfffffff0; + regs.ss = regs.fs = regs.gs = 0; /* Used before initialized */ + if (realloc(data[ndata].data, tsize)) { + error("Failed to realloc for DRMK\n"); + goto bail; + } + data[ndata].size = tsize; + /* ds:[bp+28] must be 0x0000003f */ + regs.ds = (tsize >> 4) - 2; + + /* loadfile(opt.loadfile, &data[ndata].data, &data[ndata].size) */ + + } +// dl=drive bp=0 cs=0x0070 ss=0 +// ds=0x2000 old code segment +// bx=bytes of whole blocks(1024) loaded of file: fileSize & 0xFC00 probably just garbage remnants +// fs,gs: zero so unlikely + + ndata++; } -- 2.7.4