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Kernel: Rename Thread::tss to Thread::regs and add x86_64 support

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We're using software context switches so calling this struct tss is
somewhat misleading.
This commit is contained in:
Gunnar Beutner 2021-06-26 19:57:16 +02:00 • committed by Andreas Kling
parent eba33f82b8
commit f285241cb8
14 changed files with 246 additions and 204 deletions
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27
Kernel/Syscalls/execve.cpp
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@ -597,7 +597,7 @@ KResult Process::do_exec(NonnullRefPtr<FileDescription> main_program_description
auto make_stack_result = make_userspace_stack_for_main_thread(*load_result.stack_region.unsafe_ptr(), move(arguments), move(environment), move(auxv));
if (make_stack_result.is_error())
return make_stack_result.error();
u32 new_userspace_esp = make_stack_result.value();
FlatPtr new_userspace_esp = make_stack_result.value();
if (wait_for_tracer_at_next_execve()) {
// Make sure we release the ptrace lock here or the tracer will block forever.
@ -636,22 +636,21 @@ KResult Process::do_exec(NonnullRefPtr<FileDescription> main_program_description
}
new_main_thread->reset_fpu_state();
auto& regs = new_main_thread->m_regs;
#if ARCH(I386)
auto& tss = new_main_thread->m_tss;
tss.cs = GDT_SELECTOR_CODE3 | 3;
tss.ds = GDT_SELECTOR_DATA3 | 3;
tss.es = GDT_SELECTOR_DATA3 | 3;
tss.ss = GDT_SELECTOR_DATA3 | 3;
tss.fs = GDT_SELECTOR_DATA3 | 3;
tss.gs = GDT_SELECTOR_TLS | 3;
tss.eip = load_result.entry_eip;
tss.esp = new_userspace_esp;
tss.cr3 = space().page_directory().cr3();
tss.ss2 = pid().value();
regs.cs = GDT_SELECTOR_CODE3 | 3;
regs.ds = GDT_SELECTOR_DATA3 | 3;
regs.es = GDT_SELECTOR_DATA3 | 3;
regs.ss = GDT_SELECTOR_DATA3 | 3;
regs.fs = GDT_SELECTOR_DATA3 | 3;
regs.gs = GDT_SELECTOR_TLS | 3;
regs.eip = load_result.entry_eip;
regs.esp = new_userspace_esp;
#else
(void)new_userspace_esp;
PANIC("Process::do_exec() not implemented");
regs.rip = load_result.entry_eip;
regs.rsp = new_userspace_esp;
#endif
regs.cr3 = space().page_directory().cr3();
{
TemporaryChange profiling_disabler(m_profiling, was_profiling);