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Fix floating point corruption on thread exit.

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This commit is contained in:
Jonas 'Sortie' Termansen 2013-01-14 14:38:21 +01:00
parent 6a44dcae04
commit 607128334f
3 changed files with 10 additions and 4 deletions
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3
sortix/scheduler.cpp
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@ -175,7 +175,8 @@ static void InterruptYieldCPU(CPU::InterruptRegisters* regs, void* /*user*/)
static void ThreadExitCPU(CPU::InterruptRegisters* regs, void* /*user*/) static void ThreadExitCPU(CPU::InterruptRegisters* regs, void* /*user*/)
{ {
Float::NofityTaskExit(); // Can't use floating point instructions from now. // Can't use floating point instructions from now.
Float::NofityTaskExit(currentthread);
SetThreadState(currentthread, Thread::State::DEAD); SetThreadState(currentthread, Thread::State::DEAD);
InterruptYieldCPU(regs, NULL); InterruptYieldCPU(regs, NULL);
} }

5
sortix/x86-family/float.cpp
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@ -75,9 +75,10 @@ void Init()
Interrupt::RegisterHandler(7, OnFPUAccess, NULL); Interrupt::RegisterHandler(7, OnFPUAccess, NULL);
} }
void NofityTaskExit() void NofityTaskExit(Thread* thread)
{ {
fputhread = NULL; if ( fputhread == thread )
fputhread = NULL;
DisableFPU(); DisableFPU();
} }

6
sortix/x86-family/float.h
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@ -26,10 +26,13 @@
#define SORTIX_FLOAT_H #define SORTIX_FLOAT_H
namespace Sortix { namespace Sortix {
class Thread;
namespace Float { namespace Float {
void Init(); void Init();
void NofityTaskExit(); void NofityTaskExit(Thread* thread);
static inline void EnableFPU() static inline void EnableFPU()
{ {
@ -50,5 +53,6 @@ static inline void NotityTaskSwitch()
} }
} // namespace Float } // namespace Float
} // namespace Sortix } // namespace Sortix
#endif #endif