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Mark TSS busy after it is loaded

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This commit is contained in:
Stanislav Shwartsman 2008-04-19 11:08:39 +00:00
parent 9f2906eab8
commit 8e2850b3ec
1 changed files with 5 additions and 7 deletions
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12
bochs/cpu/tasking.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: tasking.cc,v 1.50 2008-04-16 22:22:10 sshwarts Exp $
// $Id: tasking.cc,v 1.51 2008-04-19 11:08:39 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -357,9 +357,9 @@ void BX_CPU_C::task_switch(bx_selector_t *tss_selector,
if (source == BX_TASK_FROM_JUMP || source == BX_TASK_FROM_CALL_OR_INT)
{
// set the new task's busy bit
bx_address laddr = BX_CPU_THIS_PTR gdtr.base + (tss_selector->index<<3) + 4;
Bit32u laddr = (Bit32u)(BX_CPU_THIS_PTR gdtr.base) + (tss_selector->index<<3) + 4;
access_read_linear(laddr, 4, 0, BX_READ, &dword2);
dword2 |= 0x00000200;
dword2 |= 0x200;
access_write_linear(laddr, 4, 0, &dword2);
}
@ -371,7 +371,7 @@ void BX_CPU_C::task_switch(bx_selector_t *tss_selector,
// Bit is cleared
Bit32u laddr = (Bit32u) BX_CPU_THIS_PTR gdtr.base + (BX_CPU_THIS_PTR tr.selector.index<<3) + 4;
access_read_linear(laddr, 4, 0, BX_READ, &temp32);
temp32 &= ~0x00000200;
temp32 &= ~0x200;
access_write_linear(laddr, 4, 0, &temp32);
}
@ -389,9 +389,7 @@ void BX_CPU_C::task_switch(bx_selector_t *tss_selector,
BX_CPU_THIS_PTR tr.selector = *tss_selector;
BX_CPU_THIS_PTR tr.cache = *tss_descriptor;
// Reset the busy-flag, because all functions expect non-busy types in
// tr.cache. From Peter Lammich <peterl@sourceforge.net>.
BX_CPU_THIS_PTR tr.cache.type &= ~2;
BX_CPU_THIS_PTR tr.cache.type |= 2; // mark TSS in TR as busy
// Step 8: Set TS flag in the CR0 image stored in the new task TSS.
BX_CPU_THIS_PTR cr0.set_TS(1);