diff options
Diffstat (limited to 'MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/SetIdtEntry.c')
| -rw-r--r-- | MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/SetIdtEntry.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/SetIdtEntry.c b/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/SetIdtEntry.c index 9f04959cd9..fbdf32b60b 100644 --- a/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/SetIdtEntry.c +++ b/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/SetIdtEntry.c @@ -50,14 +50,25 @@ SetIdtEntry ( // Restore IDT for debug
//
IdtDescriptor = (IA32_DESCRIPTOR *) (UINTN) (AcpiS3Context->IdtrProfile);
- IdtEntry = (INTERRUPT_GATE_DESCRIPTOR *)(IdtDescriptor->Base + (3 * sizeof (INTERRUPT_GATE_DESCRIPTOR)));
- S3DebugBuffer = (UINTN) (AcpiS3Context->S3DebugBufferAddress);
+ AsmWriteIdtr (IdtDescriptor);
- IdtEntry->OffsetLow = (UINT16)S3DebugBuffer;
- IdtEntry->SegmentSelector = (UINT16)AsmReadCs ();
- IdtEntry->Attributes = (UINT16)INTERRUPT_GATE_ATTRIBUTE;
- IdtEntry->OffsetHigh = (UINT16)(S3DebugBuffer >> 16);
+ //
+ // Setup the default CPU exception handlers
+ //
+ SetupCpuExceptionHandlers ();
- AsmWriteIdtr (IdtDescriptor);
+ DEBUG_CODE (
+ //
+ // Update IDT entry INT3 if the instruction is valid in it
+ //
+ S3DebugBuffer = (UINTN) (AcpiS3Context->S3DebugBufferAddress);
+ if (*(UINTN *)S3DebugBuffer != (UINTN) -1) {
+ IdtEntry = (INTERRUPT_GATE_DESCRIPTOR *)(IdtDescriptor->Base + (3 * sizeof (INTERRUPT_GATE_DESCRIPTOR)));
+ IdtEntry->OffsetLow = (UINT16)S3DebugBuffer;
+ IdtEntry->SegmentSelector = (UINT16)AsmReadCs ();;
+ IdtEntry->Attributes = (UINT16)INTERRUPT_GATE_ATTRIBUTE;
+ IdtEntry->OffsetHigh = (UINT16)(S3DebugBuffer >> 16);
+ }
+ );
}
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