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Implemented selector limits on some instructions - fixes LBA2.

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GPFs in real mode now work.
Selectors correctly zeroed on far return to lower privilege.
This commit is contained in:
TomW 2014-08-13 20:33:56 +01:00
commit cd2c3b47ed
16 changed files with 404 additions and 462 deletions
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41
src/x86_ops_prefix.h
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@ -1,59 +1,42 @@
static int op_CS(uint32_t fetchdat)
{
oldss = ss;
oldds = ds;
ds = ss = cs;
rds = CS;
ssegs = 2;
ea_seg = &_cs;
ssegs = 1;
cycles -= 4;
return 1;
}
static int op_DS(uint32_t fetchdat)
{
oldss = ss;
oldds = ds;
ds = ss = ds;
ssegs = 2;
ea_seg = &_ds;
ssegs = 1;
cycles -= 4;
return 1;
}
static int op_ES(uint32_t fetchdat)
{
oldss = ss;
oldds = ds;
ds = ss = es;
rds = ES;
ssegs = 2;
ea_seg = &_es;
ssegs = 1;
cycles -= 4;
return 1;
}
static int op_FS(uint32_t fetchdat)
{
oldss = ss;
oldds = ds;
rds = FS;
ds = ss = fs;
ssegs = 2;
ea_seg = &_fs;
ssegs = 1;
cycles -= 4;
return 1;
}
static int op_GS(uint32_t fetchdat)
{
oldss = ss;
oldds = ds;
rds = GS;
ds = ss = gs;
ssegs = 2;
ea_seg = &_gs;
ssegs = 1;
cycles -= 4;
return 1;
}
static int op_SS(uint32_t fetchdat)
{
oldss = ss;
oldds = ds;
ds = ss = ss;
rds = SS;
ssegs = 2;
ea_seg = &_ss;
ssegs = 1;
cycles -= 4;
return 1;
}