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Kernel: Add "video" pledge for accessing framebuffer devices

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WindowServer becomes the only user.
This commit is contained in:
Andreas Kling 2020-01-12 02:17:30 +01:00
parent bb6b9d9059
commit 017b34e1ad
5 changed files with 28 additions and 23 deletions
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22
Kernel/Process.h
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@ -46,6 +46,7 @@ extern VirtualAddress g_return_to_ring3_from_signal_trampoline;
__ENUMERATE_PLEDGE_PROMISE(chown) \
__ENUMERATE_PLEDGE_PROMISE(chroot) \
__ENUMERATE_PLEDGE_PROMISE(thread) \
__ENUMERATE_PLEDGE_PROMISE(video) \
__ENUMERATE_PLEDGE_PROMISE(shared_buffer)
enum class Pledge : u32 {
@ -567,3 +568,24 @@ inline u32 Thread::effective_priority() const
{
return m_priority + m_process.priority_boost() + m_priority_boost + m_extra_priority;
}
#define REQUIRE_NO_PROMISES \
do { \
if (current->process().has_promises()) { \
dbg() << *current << " has made a promise"; \
cli(); \
current->process().crash(SIGABRT, 0); \
ASSERT_NOT_REACHED(); \
} \
} while (0)
#define REQUIRE_PROMISE(promise) \
do { \
if (current->process().has_promises() \
&& !current->process().has_promised(Pledge::promise)) { \
dbg() << *current << " has not pledged " << #promise; \
cli(); \
current->process().crash(SIGABRT, 0); \
ASSERT_NOT_REACHED(); \
} \
} while (0)