SourceLevelDebugPkg: Fix spelling errors

[mirror_edk2.git] / SourceLevelDebugPkg / Library / PeCoffExtraActionLibDebug / X64 / IntHandlerFuncs.c

/** @file\r
  X64 arch function to access IDT vector.\r
\r
  Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <PeCoffExtraActionLib.h>\r
\r
/**\r
  Read IDT entry to check if IDT entries are setup by Debug Agent.\r
\r
  @param[in]  IdtDescriptor      Pointer to IDT Descriptor.\r
  @param[in]  InterruptType      Interrupt type.\r
\r
  @retval  TRUE     IDT entries were setup by Debug Agent.\r
  @retval  FALSE    IDT entries were not setup by Debug Agent.\r
\r
**/\r
BOOLEAN\r
CheckDebugAgentHandler (\r
  IN  IA32_DESCRIPTOR  *IdtDescriptor,\r
  IN  UINTN            InterruptType\r
  )\r
{\r
  IA32_IDT_GATE_DESCRIPTOR  *IdtEntry;\r
  UINTN                     InterruptHandler;\r
\r
  IdtEntry = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor->Base;\r
  if (IdtEntry == NULL) {\r
    return FALSE;\r
  }\r
\r
  InterruptHandler = IdtEntry[InterruptType].Bits.OffsetLow +\r
                     (((UINTN)IdtEntry[InterruptType].Bits.OffsetHigh) << 16) +\r
                     (((UINTN)IdtEntry[InterruptType].Bits.OffsetUpper) << 32);\r
  if ((InterruptHandler >= sizeof (UINT32)) &&  (*(UINT32 *)(InterruptHandler - sizeof (UINT32)) == AGENT_HANDLER_SIGNATURE)) {\r
    return TRUE;\r
  } else {\r
    return FALSE;\r
  }\r
}\r
\r
/**\r
  Save IDT entry for INT1 and update it.\r
\r
  @param[in]  IdtDescriptor      Pointer to IDT Descriptor.\r
  @param[out] SavedIdtEntry      Original IDT entry returned.\r
\r
**/\r
VOID\r
SaveAndUpdateIdtEntry1 (\r
  IN  IA32_DESCRIPTOR           *IdtDescriptor,\r
  OUT IA32_IDT_GATE_DESCRIPTOR  *SavedIdtEntry\r
  )\r
{\r
  IA32_IDT_GATE_DESCRIPTOR  *IdtEntry;\r
  UINT16                    CodeSegment;\r
  UINTN                     InterruptHandler;\r
\r
  IdtEntry = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor->Base;\r
  CopyMem (SavedIdtEntry, &IdtEntry[1], sizeof (IA32_IDT_GATE_DESCRIPTOR));\r
\r
  //\r
  // Use current CS as the segment selector of interrupt gate in IDT\r
  //\r
  CodeSegment = AsmReadCs ();\r
\r
  InterruptHandler             = (UINTN)&AsmInterruptHandle;\r
  IdtEntry[1].Bits.OffsetLow   = (UINT16)(UINTN)InterruptHandler;\r
  IdtEntry[1].Bits.OffsetHigh  = (UINT16)((UINTN)InterruptHandler >> 16);\r
  IdtEntry[1].Bits.OffsetUpper = (UINT32)((UINTN)InterruptHandler >> 32);\r
  IdtEntry[1].Bits.Selector    = CodeSegment;\r
  IdtEntry[1].Bits.GateType    = IA32_IDT_GATE_TYPE_INTERRUPT_32;\r
}\r
\r
/**\r
  Restore IDT entry for INT1.\r
\r
  @param[in]  IdtDescriptor      Pointer to IDT Descriptor.\r
  @param[in]  RestoredIdtEntry   IDT entry to be restored.\r
\r
**/\r
VOID\r
RestoreIdtEntry1 (\r
  IN  IA32_DESCRIPTOR           *IdtDescriptor,\r
  IN  IA32_IDT_GATE_DESCRIPTOR  *RestoredIdtEntry\r
  )\r
{\r
  IA32_IDT_GATE_DESCRIPTOR  *IdtEntry;\r
\r
  IdtEntry = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor->Base;\r
  CopyMem (&IdtEntry[1], RestoredIdtEntry, sizeof (IA32_IDT_GATE_DESCRIPTOR));\r
}\r