private void CheckRequiredRegistersAvailable()
{
ArmRegisterCollection regs = CPU.Registers;
// We need SP, LR, PC, CPSR
bool sp = regs.Contains(TArmRegisterType.EArmReg_SP);
bool lr = regs.Contains(TArmRegisterType.EArmReg_LR);
bool pc = regs.Contains(TArmRegisterType.EArmReg_PC);
bool cpsr = regs.Contains(TArmRegisterType.EArmReg_CPSR);
//
bool available = (sp && lr && pc && cpsr);
if (!available)
{
SymbianUtils.SymDebug.SymDebugger.Break();
throw new ArgumentException("One or more registers is unavailable");
}
}
private bool AddLRAndPC()
{
bool addedLRandPC = false;
//
ArmRegisterCollection regs = base.Engine.Registers;
// If we're inside the stack address range, then poke in the PC and LR values
if (regs.Count > 0)
{
// Working bottom up, so LR should go on the stack first
if (regs.Contains(TArmRegisterType.EArmReg_LR))
{
ArmRegister regLR = regs[TArmRegisterType.EArmReg_LR];
StackOutputEntry entryLR = new StackOutputEntry(0, regLR.Value, base.DebugEngineView);
entryLR.IsRegisterBasedEntry = true;
entryLR.IsOutsideCurrentStackRange = true;
entryLR.AssociatedRegister = regLR.RegType;
EmitElement(entryLR);
}
// Then the PC...
if (regs.Contains(TArmRegisterType.EArmReg_PC))
{
ArmRegister regPC = regs[TArmRegisterType.EArmReg_PC];
StackOutputEntry entryPC = new StackOutputEntry(0, regPC.Value, base.DebugEngineView);
entryPC.IsRegisterBasedEntry = true;
entryPC.IsOutsideCurrentStackRange = true;
entryPC.AssociatedRegister = regPC.RegType;
EmitElement(entryPC);
}
// Even if they weren't added, we at least attempted to addd them
addedLRandPC = true;
}
return(addedLRandPC);
}
