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kern: fix bugs caused by UB + transition to -Os

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This commit is contained in:
Michael Scire 2020-12-01 18:41:44 -08:00 committed by SciresM
parent 1b164613a6
commit 3c8e7de915
4 changed files with 49 additions and 45 deletions
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8
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_spin_lock.hpp
View file

@ -25,7 +25,7 @@ namespace ams::kern::arch::arm64 {
public: public:
constexpr KNotAlignedSpinLock() : packed_tickets(0) { /* ... */ } constexpr KNotAlignedSpinLock() : packed_tickets(0) { /* ... */ }
void Lock() { ALWAYS_INLINE void Lock() {
u32 tmp0, tmp1, tmp2; u32 tmp0, tmp1, tmp2;
__asm__ __volatile__( __asm__ __volatile__(
@ -52,7 +52,7 @@ namespace ams::kern::arch::arm64 {
); );
} }
void Unlock() { ALWAYS_INLINE void Unlock() {
const u32 value = this->packed_tickets + 1; const u32 value = this->packed_tickets + 1;
__asm__ __volatile__( __asm__ __volatile__(
" stlrh %w[value], %[packed_tickets]\n" " stlrh %w[value], %[packed_tickets]\n"
@ -71,7 +71,7 @@ namespace ams::kern::arch::arm64 {
public: public:
constexpr KAlignedSpinLock() : current_ticket(0), next_ticket(0) { /* ... */ } constexpr KAlignedSpinLock() : current_ticket(0), next_ticket(0) { /* ... */ }
void Lock() { ALWAYS_INLINE void Lock() {
u32 tmp0, tmp1, got_lock; u32 tmp0, tmp1, got_lock;
__asm__ __volatile__( __asm__ __volatile__(
@ -94,7 +94,7 @@ namespace ams::kern::arch::arm64 {
); );
} }
void Unlock() { ALWAYS_INLINE void Unlock() {
const u32 value = this->current_ticket + 1; const u32 value = this->current_ticket + 1;
__asm__ __volatile__( __asm__ __volatile__(
" stlrh %w[value], %[current_ticket]\n" " stlrh %w[value], %[current_ticket]\n"

4
libraries/libmesosphere/include/mesosphere/kern_select_interrupt_manager.hpp
View file

@ -42,7 +42,7 @@ namespace ams::kern {
u32 prev_intr_state; u32 prev_intr_state;
public: public:
ALWAYS_INLINE KScopedInterruptDisable() : prev_intr_state(KInterruptManager::DisableInterrupts()) { /* ... */ } ALWAYS_INLINE KScopedInterruptDisable() : prev_intr_state(KInterruptManager::DisableInterrupts()) { /* ... */ }
~KScopedInterruptDisable() { KInterruptManager::RestoreInterrupts(prev_intr_state); } ALWAYS_INLINE ~KScopedInterruptDisable() { KInterruptManager::RestoreInterrupts(prev_intr_state); }
}; };
class KScopedInterruptEnable { class KScopedInterruptEnable {
@ -52,7 +52,7 @@ namespace ams::kern {
u32 prev_intr_state; u32 prev_intr_state;
public: public:
ALWAYS_INLINE KScopedInterruptEnable() : prev_intr_state(KInterruptManager::EnableInterrupts()) { /* ... */ } ALWAYS_INLINE KScopedInterruptEnable() : prev_intr_state(KInterruptManager::EnableInterrupts()) { /* ... */ }
~KScopedInterruptEnable() { KInterruptManager::RestoreInterrupts(prev_intr_state); } ALWAYS_INLINE ~KScopedInterruptEnable() { KInterruptManager::RestoreInterrupts(prev_intr_state); }
}; };
} }

10
libraries/libmesosphere/source/board/nintendo/nx/kern_secure_monitor.cpp
View file

@ -58,6 +58,7 @@ namespace ams::kern::board::nintendo::nx::smc {
/* Disable interrupts while making the call. */ /* Disable interrupts while making the call. */
KScopedInterruptDisable intr_disable; KScopedInterruptDisable intr_disable;
{
/* Backup the current thread pointer. */ /* Backup the current thread pointer. */
const uintptr_t current_thread_pointer_value = cpu::GetCurrentThreadPointerValue(); const uintptr_t current_thread_pointer_value = cpu::GetCurrentThreadPointerValue();
@ -69,7 +70,6 @@ namespace ams::kern::board::nintendo::nx::smc {
/* Restore the current thread pointer into X18. */ /* Restore the current thread pointer into X18. */
cpu::SetCurrentThreadPointerValue(current_thread_pointer_value); cpu::SetCurrentThreadPointerValue(current_thread_pointer_value);
}
/* Store arguments to output. */ /* Store arguments to output. */
args.x[0] = x0; args.x[0] = x0;
@ -81,6 +81,8 @@ namespace ams::kern::board::nintendo::nx::smc {
args.x[6] = x6; args.x[6] = x6;
args.x[7] = x7; args.x[7] = x7;
} }
}
}
void CallUserSecureMonitorFunction(ams::svc::lp64::SecureMonitorArguments *args) { void CallUserSecureMonitorFunction(ams::svc::lp64::SecureMonitorArguments *args) {
/* Load arguments into registers. */ /* Load arguments into registers. */
@ -98,10 +100,11 @@ namespace ams::kern::board::nintendo::nx::smc {
/* Disable interrupts while making the call. */ /* Disable interrupts while making the call. */
KScopedInterruptDisable intr_disable; KScopedInterruptDisable intr_disable;
{
/* Backup the current thread pointer. */ /* Backup the current thread pointer. */
const uintptr_t current_thread_pointer_value = cpu::GetCurrentThreadPointerValue(); const uintptr_t current_thread_pointer_value = cpu::GetCurrentThreadPointerValue();
__asm__ __volatile__("smc #0" __asm__ __volatile__("smc #1"
: "+r"(x0), "+r"(x1), "+r"(x2), "+r"(x3), "+r"(x4), "+r"(x5), "+r"(x6), "+r"(x7) : "+r"(x0), "+r"(x1), "+r"(x2), "+r"(x3), "+r"(x4), "+r"(x5), "+r"(x6), "+r"(x7)
: :
: "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17", "x18", "cc", "memory" : "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17", "x18", "cc", "memory"
@ -109,7 +112,6 @@ namespace ams::kern::board::nintendo::nx::smc {
/* Restore the current thread pointer into X18. */ /* Restore the current thread pointer into X18. */
cpu::SetCurrentThreadPointerValue(current_thread_pointer_value); cpu::SetCurrentThreadPointerValue(current_thread_pointer_value);
}
/* Store arguments to output. */ /* Store arguments to output. */
args->r[0] = x0; args->r[0] = x0;
@ -121,6 +123,8 @@ namespace ams::kern::board::nintendo::nx::smc {
args->r[6] = x6; args->r[6] = x6;
args->r[7] = x7; args->r[7] = x7;
} }
}
}
void CallPrivilegedSecureMonitorFunctionForInit(SecureMonitorArguments &args) { void CallPrivilegedSecureMonitorFunctionForInit(SecureMonitorArguments &args) {
/* Load arguments into registers. */ /* Load arguments into registers. */

2
libraries/libmesosphere/source/kern_k_thread.cpp
View file

@ -63,7 +63,7 @@ namespace ams::kern {
} }
[[fallthrough]]; [[fallthrough]];
case ThreadType_HighPriority: case ThreadType_HighPriority:
{ if (type != ThreadType_Main) {
MESOSPHERE_ASSERT(phys_core == GetCurrentCoreId()); MESOSPHERE_ASSERT(phys_core == GetCurrentCoreId());
} }
[[fallthrough]]; [[fallthrough]];