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MdeModulePkg/EbcDxe: prepare support for EBC Debugger

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* This patch introduces EbcDebuggerHook.c/h and inserts the required
  EBCDebugger references into the existing EBC source files.
* With all the hooks defined to their empty version in EbcDebuggerHook.c
  the existing EBC VM behaviour is left unaffected.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Pete Batard
2016-11-16 21:24:08 +08:00
committed by Jiewen Yao
parent 0265811dbe
commit 6f0a3cd23e
9 changed files with 339 additions and 7 deletions
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39
MdeModulePkg/Universal/EbcDxe/EbcExecute.c
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@ -14,6 +14,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include "EbcInt.h"
#include "EbcExecute.h"
#include "EbcDebuggerHook.h"
//
@ -1488,6 +1489,9 @@ EbcExecute (
Status = EFI_UNSUPPORTED;
goto Done;
}
EbcDebuggerHookExecuteStart (VmPtr);
//
// The EBC VM is a strongly ordered processor, so perform a fence operation before
// and after each instruction is executed.
@ -1498,6 +1502,8 @@ EbcExecute (
MemoryFence ();
EbcDebuggerHookExecuteEnd (VmPtr);
//
// If the step flag is set, signal an exception and continue. We don't
// clear it here. Assuming the debugger is responsible for clearing it.
@ -1976,7 +1982,9 @@ ExecuteJMP (
ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);
if ((Operand & CONDITION_M_CONDITIONAL) != 0) {
if (CompareSet != ConditionFlag) {
EbcDebuggerHookJMPStart (VmPtr);
VmPtr->Ip += Size;
EbcDebuggerHookJMPEnd (VmPtr);
return EFI_SUCCESS;
}
}
@ -2015,11 +2023,13 @@ ExecuteJMP (
//
// Take jump -- relative or absolute
//
EbcDebuggerHookJMPStart (VmPtr);
if ((Operand & JMP_M_RELATIVE) != 0) {
VmPtr->Ip += (UINTN) Data64 + Size;
} else {
VmPtr->Ip = (VMIP) (UINTN) Data64;
}
EbcDebuggerHookJMPEnd (VmPtr);
return EFI_SUCCESS;
}
@ -2065,11 +2075,14 @@ ExecuteJMP (
return EFI_UNSUPPORTED;
}
EbcDebuggerHookJMPStart (VmPtr);
if ((Operand & JMP_M_RELATIVE) != 0) {
VmPtr->Ip += (UINTN) Addr + Size;
} else {
VmPtr->Ip = (VMIP) Addr;
}
EbcDebuggerHookJMPEnd (VmPtr);
} else {
//
// Form: JMP32 Rx {Immed32}
@ -2085,11 +2098,14 @@ ExecuteJMP (
return EFI_UNSUPPORTED;
}
EbcDebuggerHookJMPStart (VmPtr);
if ((Operand & JMP_M_RELATIVE) != 0) {
VmPtr->Ip += (UINTN) Addr + Size;
} else {
VmPtr->Ip = (VMIP) Addr;
}
EbcDebuggerHookJMPEnd (VmPtr);
}
return EFI_SUCCESS;
@ -2129,7 +2145,9 @@ ExecuteJMP8 (
//
if ((Opcode & CONDITION_M_CONDITIONAL) != 0) {
if (CompareSet != ConditionFlag) {
EbcDebuggerHookJMP8Start (VmPtr);
VmPtr->Ip += 2;
EbcDebuggerHookJMP8End (VmPtr);
return EFI_SUCCESS;
}
}
@ -2141,7 +2159,9 @@ ExecuteJMP8 (
//
// Want to check for offset == -2 and then raise an exception?
//
EbcDebuggerHookJMP8Start (VmPtr);
VmPtr->Ip += (Offset * 2) + 2;
EbcDebuggerHookJMP8End (VmPtr);
return EFI_SUCCESS;
}
@ -2966,6 +2986,13 @@ ExecuteCALL (
//
Opcode = GETOPCODE (VmPtr);
Operands = GETOPERANDS (VmPtr);
if (Operands & OPERAND_M_NATIVE_CALL) {
EbcDebuggerHookCALLEXStart (VmPtr);
} else {
EbcDebuggerHookCALLStart (VmPtr);
}
//
// Assign these as well to avoid compiler warnings
//
@ -3067,6 +3094,12 @@ ExecuteCALL (
}
}
if (Operands & OPERAND_M_NATIVE_CALL) {
EbcDebuggerHookCALLEXEnd (VmPtr);
} else {
EbcDebuggerHookCALLEnd (VmPtr);
}
return EFI_SUCCESS;
}
@ -3087,6 +3120,9 @@ ExecuteRET (
IN VM_CONTEXT *VmPtr
)
{
EbcDebuggerHookRETStart (VmPtr);
//
// If we're at the top of the stack, then simply set the done
// flag and return
@ -3114,6 +3150,9 @@ ExecuteRET (
VmPtr->Gpr[0] += 8;
}
EbcDebuggerHookRETEnd (VmPtr);
return EFI_SUCCESS;
}