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kern: implement new thread context/fpu semantics

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Michael Scire 2022-03-22 19:59:39 -07:00 • committed by SciresM
parent 79afa3b64c
commit 6e17317d5d
21 changed files with 1291 additions and 668 deletions
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73
libraries/libmesosphere/include/mesosphere/kern_k_capabilities.hpp
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@ -239,78 +239,7 @@ namespace ams::kern {
constexpr u64 GetPriorityMask() const { return m_priority_mask; }
constexpr s32 GetHandleTableSize() const { return m_handle_table_size; }
ALWAYS_INLINE void CopySvcPermissionsTo(KThread::StackParameters &sp) const {
/* Copy permissions. */
sp.svc_access_flags = m_svc_access_flags;
/* Clear specific SVCs based on our state. */
sp.svc_access_flags[svc::SvcId_ReturnFromException] = false;
sp.svc_access_flags[svc::SvcId_SynchronizePreemptionState] = false;
if (sp.is_pinned) {
sp.svc_access_flags[svc::SvcId_GetInfo] = false;
}
}
ALWAYS_INLINE void CopyPinnedSvcPermissionsTo(KThread::StackParameters &sp) const {
/* Get whether we have access to return from exception. */
const bool return_from_exception = sp.svc_access_flags[svc::SvcId_ReturnFromException];
/* Clear all permissions. */
sp.svc_access_flags.Reset();
/* Set SynchronizePreemptionState if allowed. */
if (m_svc_access_flags[svc::SvcId_SynchronizePreemptionState]) {
sp.svc_access_flags[svc::SvcId_SynchronizePreemptionState] = true;
}
/* If we previously had ReturnFromException, potentially grant it and GetInfo. */
if (return_from_exception) {
/* Set ReturnFromException (guaranteed allowed, if we're here). */
sp.svc_access_flags[svc::SvcId_ReturnFromException] = true;
/* Set GetInfo if allowed. */
if (m_svc_access_flags[svc::SvcId_GetInfo]) {
sp.svc_access_flags[svc::SvcId_GetInfo] = true;
}
}
}
ALWAYS_INLINE void CopyUnpinnedSvcPermissionsTo(KThread::StackParameters &sp) const {
/* Get whether we have access to return from exception. */
const bool return_from_exception = sp.svc_access_flags[svc::SvcId_ReturnFromException];
/* Copy permissions. */
sp.svc_access_flags = m_svc_access_flags;
/* Clear specific SVCs based on our state. */
sp.svc_access_flags[svc::SvcId_SynchronizePreemptionState] = false;
if (!return_from_exception) {
sp.svc_access_flags[svc::SvcId_ReturnFromException] = false;
}
}
ALWAYS_INLINE void CopyEnterExceptionSvcPermissionsTo(KThread::StackParameters &sp) const {
/* Set ReturnFromException if allowed. */
if (m_svc_access_flags[svc::SvcId_ReturnFromException]) {
sp.svc_access_flags[svc::SvcId_ReturnFromException] = true;
}
/* Set GetInfo if allowed. */
if (m_svc_access_flags[svc::SvcId_GetInfo]) {
sp.svc_access_flags[svc::SvcId_GetInfo] = true;
}
}
ALWAYS_INLINE void CopyLeaveExceptionSvcPermissionsTo(KThread::StackParameters &sp) const {
/* Clear ReturnFromException. */
sp.svc_access_flags[svc::SvcId_ReturnFromException] = false;
/* If pinned, clear GetInfo. */
if (sp.is_pinned) {
sp.svc_access_flags[svc::SvcId_GetInfo] = false;
}
}
constexpr const svc::SvcAccessFlagSet &GetSvcPermissions() const { return m_svc_access_flags; }
constexpr bool IsPermittedSvc(svc::SvcId id) const {
return (id < m_svc_access_flags.GetCount()) && m_svc_access_flags[id];