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1. DebugAgentLib will install reserved vector table to persist vectors.

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2. Update PeCoffExtraActionLib to detect if debug agent initialized or not by checking each IDT entry instead of whole IDT table.

Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14886 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan
2013-11-22 06:30:01 +00:00
committed by vanjeff
parent e41aad1521
commit 8cc26df4a6
17 changed files with 350 additions and 37 deletions
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11
SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/X64/IntHandlerFuncs.c
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@@ -18,6 +18,7 @@
Read IDT entry to check if IDT entries are setup by Debug Agent.
@param[in] IdtDescriptor Pointer to IDT Descriptor.
@param[in] InterruptType Interrupt type.
@retval TRUE IDT entries were setup by Debug Agent.
@retval FALSE IDT entries were not setuo by Debug Agent.
@@ -25,7 +26,8 @@
**/
BOOLEAN
CheckDebugAgentHandler (
IN IA32_DESCRIPTOR *IdtDescriptor
IN IA32_DESCRIPTOR *IdtDescriptor,
IN UINTN InterruptType
)
{
IA32_IDT_GATE_DESCRIPTOR *IdtEntry;
@@ -36,9 +38,10 @@ CheckDebugAgentHandler (
return FALSE;
}
InterruptHandler = IdtEntry[0].Bits.OffsetLow + (((UINTN)IdtEntry[0].Bits.OffsetHigh) << 16) +
(((UINTN)IdtEntry[0].Bits.OffsetUpper) << 32);
if (InterruptHandler >= 4 && *(UINT32 *)(InterruptHandler - 4) == AGENT_HANDLER_SIGNATURE) {
InterruptHandler = IdtEntry[InterruptType].Bits.OffsetLow +
(((UINTN)IdtEntry[InterruptType].Bits.OffsetHigh) << 16) +
(((UINTN)IdtEntry[InterruptType].Bits.OffsetUpper) << 32);
if (InterruptHandler >= sizeof (UINT32) && *(UINT32 *)(InterruptHandler - sizeof (UINT32)) == AGENT_HANDLER_SIGNATURE) {
return TRUE;
} else {
return FALSE;