RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 00:37:34 +00:00
Code Issues Activity Actions

Kernel: Reset FPU state on exec()

Browse source
This commit is contained in:
Andreas Kling 2020-02-18 13:44:27 +01:00
parent 315538245f
commit 9aa234cc47
3 changed files with 9 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

1
Kernel/Process.cpp
View file

@ -992,6 +992,7 @@ int Process::do_exec(NonnullRefPtr<FileDescription> main_program_description, Ve
m_master_tls_alignment = master_tls_alignment; m_master_tls_alignment = master_tls_alignment;
new_main_thread->make_thread_specific_region({}); new_main_thread->make_thread_specific_region({});
new_main_thread->reset_fpu_state();
memset(&tss, 0, sizeof(TSS32)); memset(&tss, 0, sizeof(TSS32));
tss.iomapbase = sizeof(TSS32); tss.iomapbase = sizeof(TSS32);

7
Kernel/Thread.cpp
View file

@ -94,7 +94,7 @@ Thread::Thread(Process& process)
#endif #endif
set_default_signal_dispositions(); set_default_signal_dispositions();
m_fpu_state = (FPUState*)kmalloc_aligned(sizeof(FPUState), 16); m_fpu_state = (FPUState*)kmalloc_aligned(sizeof(FPUState), 16);
memcpy(m_fpu_state, &s_clean_fpu_state, sizeof(FPUState)); reset_fpu_state();
memset(&m_tss, 0, sizeof(m_tss)); memset(&m_tss, 0, sizeof(m_tss));
m_tss.iomapbase = sizeof(TSS32); m_tss.iomapbase = sizeof(TSS32);
@ -879,4 +879,9 @@ Thread* Thread::from_tid(int tid)
return found_thread; return found_thread;
} }
void Thread::reset_fpu_state()
{
memcpy(m_fpu_state, &s_clean_fpu_state, sizeof(FPUState));
}
} }

3
Kernel/Thread.h
View file

@ -440,8 +440,9 @@ private:
friend class WaitQueue; friend class WaitQueue;
bool unlock_process_if_locked(); bool unlock_process_if_locked();
void relock_process(); void relock_process();
String backtrace_impl() const; String backtrace_impl() const;
void reset_fpu_state();
Process& m_process; Process& m_process;
int m_tid { -1 }; int m_tid { -1 };
TSS32 m_tss; TSS32 m_tss;