From 95a7be141a07a20b8465981b01116fcafb6b5f41 Mon Sep 17 00:00:00 2001
From: Rusty Wagner <rusty@vector35.com>
Date: Tue, 3 Oct 2017 23:07:48 -0400
Subject: Adding support for register stacks in IL (for x87)

---
 callingconvention.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'callingconvention.cpp')

diff --git a/callingconvention.cpp b/callingconvention.cpp
index 945ba25f..b29d51e2 100644
--- a/callingconvention.cpp
+++ b/callingconvention.cpp
@@ -264,8 +264,16 @@ vector<uint32_t> CallingConvention::GetImplicitlyDefinedRegisters()
 }
 
 
-RegisterValue CallingConvention::GetIncomingRegisterValue(uint32_t, Function*)
-{
+RegisterValue CallingConvention::GetIncomingRegisterValue(uint32_t reg, Function*)
+{
+	uint32_t regStack = GetArchitecture()->GetRegisterStackForRegister(reg);
+	if ((regStack != BN_INVALID_REGISTER) && (reg == GetArchitecture()->GetRegisterStackInfo(regStack).stackTopReg))
+	{
+		RegisterValue value;
+		value.state = ConstantValue;
+		value.value = 0;
+		return value;
+	}
 	return RegisterValue();
 }
 
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