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Kernel: align userspace stacks

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I was getting #GP on sse instructions
This commit is contained in:
Bananymous
2023-08-03 18:09:48 +03:00
parent c67a7cec5b
commit a11b5ae41f
2 changed files with 13 additions and 1 deletions
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4
kernel/kernel/Thread.cpp
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@@ -83,6 +83,7 @@ namespace Kernel
thread->m_rip = (uintptr_t)entry;
// Initialize stack for returning
write_to_stack(thread->m_rsp, nullptr); // alignment
write_to_stack(thread->m_rsp, thread);
write_to_stack(thread->m_rsp, &Thread::on_exit);
write_to_stack(thread->m_rsp, data);
@@ -179,6 +180,7 @@ namespace Kernel
{
// FIXME: don't use PageTableScope
PageTableScope _(process().page_table());
write_to_stack(m_rsp, nullptr); // alignment
write_to_stack(m_rsp, this);
write_to_stack(m_rsp, &Thread::on_exit);
write_to_stack(m_rsp, nullptr);
@@ -206,6 +208,7 @@ namespace Kernel
{
// FIXME: don't use PageTableScope
PageTableScope _(process().page_table());
write_to_stack(m_rsp, nullptr); // alignment
write_to_stack(m_rsp, this);
write_to_stack(m_rsp, &Thread::on_exit);
write_to_stack(m_rsp, m_process);
@@ -275,6 +278,7 @@ namespace Kernel
// FIXME: signal trampoline should take a hash etc
// to only allow marking signals done from it
m_handling_signal = signal;
return_rsp += 128; // skip possible red-zone
write_to_stack(return_rsp, return_rip);
write_to_stack(return_rsp, signal);
write_to_stack(return_rsp, signal_handler);