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Pause syscall and int 0xee interrupt syscalls

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The syscall/sysret instructions don't swap stacks. This was bad but
passable until syscalls caused the scheduler to run, and scheduling a
task that paused due to interrupt.

Adding a new (hopefully temporary) syscall interrupt `int 0xee` to allow
me to test syscalls without stack issues before I tackle the
syscall/sysret issue.

Also implemented a basic `pause` syscall that causes the calling process
to become unready. Because nothing can wake a process yet, it never
returns.
This commit is contained in:
Justin C. Miller
2018-09-12 20:59:08 -07:00
parent c2f85ce61b
commit 62c559043d
13 changed files with 233 additions and 136 deletions
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2
src/kernel/page_manager.cpp
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@@ -266,7 +266,7 @@ page_manager::get_table_page()
}
reinterpret_cast<free_page_header *>(virt)->next = nullptr;
log::info(logs::memory, "Mappd %d new page table pages at %lx", n, phys);
log::debug(logs::memory, "Mappd %d new page table pages at %lx", n, phys);
}
free_page_header *page = m_page_cache;