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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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6
src/x86_ops_jump.h
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@ -198,7 +198,6 @@ static int opJMP_far_a32(uint32_t fetchdat)
int opCALL_r16(uint32_t fetchdat)
{
int16_t addr = (int16_t)getwordf();
if (ssegs) ss=oldss;
PUSH_W(pc);
pc += addr;
cycles -= (is486) ? 3 : 7;
@ -207,7 +206,6 @@ int opCALL_r16(uint32_t fetchdat)
int opCALL_r32(uint32_t fetchdat)
{
int32_t addr = getlong(); if (abrt) return 0;
if (ssegs) ss=oldss;
PUSH_L(pc);
pc += addr;
cycles -= (is486) ? 3 : 7;
@ -218,7 +216,6 @@ int opRET_w(uint32_t fetchdat)
{
uint16_t ret;
if (ssegs) ss=oldss;
ret = POP_W(); if (abrt) return 0;
pc = ret;
@ -229,7 +226,6 @@ int opRET_l(uint32_t fetchdat)
{
uint32_t ret;
if (ssegs) ss=oldss;
ret = POP_L(); if (abrt) return 0;
pc = ret;
@ -242,7 +238,6 @@ int opRET_w_imm(uint32_t fetchdat)
uint16_t offset = getwordf();
uint16_t ret;
if (ssegs) ss=oldss;
ret = POP_W(); if (abrt) return 0;
if (stack32) ESP += offset;
else SP += offset;
@ -256,7 +251,6 @@ int opRET_l_imm(uint32_t fetchdat)
uint16_t offset = getwordf();
uint32_t ret;
if (ssegs) ss=oldss;
ret = POP_L(); if (abrt) return 0;
if (stack32) ESP += offset;
else SP += offset;