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Applied patch by Jan Kloetzke:

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The PUSHF/POPF instructions were not emulated correctly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26325 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2008-07-08 18:25:45 +00:00
parent fc8e77f863
commit 6be60b2d19
1 changed files with 6 additions and 5 deletions
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11
src/system/kernel/arch/x86/vm86.cpp
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@ -44,8 +44,8 @@
#define PUSHF 0x9c
#define STI 0xfb
#define I_FLAG (1 << 9)
#define DIRECTION_FLAG (1 << 10)
#define I_FLAG (1u << 9)
#define DIRECTION_FLAG (1u << 10)
#define CSEG 0x2e
#define SSEG 0x36
@ -442,7 +442,7 @@ emulate(struct vm86_state *state)
uint16 flags = state->regs.flags;
/* store real IF */
flags &= I_FLAG;
flags &= ~I_FLAG;
flags |= (uint16)state->if_flag << 9;
pushw(&state->regs, flags);
@ -475,10 +475,11 @@ emulate(struct vm86_state *state)
case PUSHF:
{
TRACE_NP("PUSHF");
uint16 flags = state->regs.flags & I_FLAG;
uint32 flags = state->regs.flags;
/* store real IF */
flags |= (uint16)state->if_flag << 9;
flags &= ~I_FLAG;
flags |= (uint32)state->if_flag << 9;
if (prefix.size)
pushl(&state->regs, flags);
else