StackFrame unwind_method(StackFrame frame, TargetMemoryAccess memory, byte[] code,
int pos, int offset)
{
Registers old_regs = frame.Registers;
Registers regs = CopyRegisters (old_regs);
if (!old_regs [(int) X86_Register.RBP].Valid)
return null;
TargetAddress rbp = new TargetAddress (
memory.AddressDomain, old_regs [(int) X86_Register.RBP].Value);
int addr_size = TargetAddressSize;
TargetAddress new_rbp = memory.ReadAddress (rbp);
regs [(int) X86_Register.RBP].SetValue (rbp, new_rbp);
TargetAddress new_rip = memory.ReadAddress (rbp + addr_size);
regs [(int) X86_Register.RIP].SetValue (rbp + addr_size, new_rip);
TargetAddress new_rsp = rbp + 2 * addr_size;
regs [(int) X86_Register.RSP].SetValue (rbp, new_rsp);
rbp -= addr_size;
int length = System.Math.Min (code.Length, offset);
while (pos < length) {
byte opcode = code [pos++];
long value;
if ((opcode == 0x41) && (pos < length)) {
byte opcode2 = code [pos++];
if ((opcode2 < 0x50) || (opcode2 > 0x57))
break;
switch (opcode2) {
case 0x50: /* r8 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R8].SetValue (rbp, value);
break;
case 0x51: /* r9 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R9].SetValue (rbp, value);
break;
case 0x52: /* r10 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R10].SetValue (rbp, value);
break;
case 0x53: /* r11 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R11].SetValue (rbp, value);
break;
case 0x54: /* r12 */
value = (long) memory.ReadAddress (rbp).Address;
regs [(int) X86_Register.R12].SetValue (rbp, value);
break;
case 0x55: /* r13 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R13].SetValue (rbp, value);
break;
case 0x56: /* r14 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R14].SetValue (rbp, value);
break;
case 0x57: /* r15 */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.R15].SetValue (rbp, value);
break;
}
} else {
if ((opcode < 0x50) || (opcode > 0x57))
break;
switch (opcode) {
case 0x50: /* rax */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.RAX].SetValue (rbp, value);
break;
case 0x51: /* rcx */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.RCX].SetValue (rbp, value);
break;
case 0x52: /* rdx */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.RDX].SetValue (rbp, value);
break;
case 0x53: /* rbx */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.RBX].SetValue (rbp, value);
break;
case 0x56: /* rsi */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.RSI].SetValue (rbp, value);
break;
case 0x57: /* rdi */
value = memory.ReadLongInteger (rbp);
regs [(int) X86_Register.RDI].SetValue (rbp, value);
break;
}
}
rbp -= addr_size;
}
return CreateFrame (frame.Thread, FrameType.Normal, memory, new_rip, new_rsp, new_rbp, regs);
}
StackFrame unwind_method(StackFrame frame, TargetMemoryAccess memory, byte[] code,
int pos, int offset)
{
Registers old_regs = frame.Registers;
Registers regs = CopyRegisters(old_regs);
if (!old_regs [(int)X86_Register.RBP].Valid)
{
return(null);
}
TargetAddress rbp = new TargetAddress(
memory.AddressDomain, old_regs [(int)X86_Register.RBP].Value);
int addr_size = TargetAddressSize;
TargetAddress new_rbp = memory.ReadAddress(rbp);
regs [(int)X86_Register.RBP].SetValue(rbp, new_rbp);
TargetAddress new_rip = memory.ReadAddress(rbp + addr_size);
regs [(int)X86_Register.RIP].SetValue(rbp + addr_size, new_rip);
TargetAddress new_rsp = rbp + 2 * addr_size;
regs [(int)X86_Register.RSP].SetValue(rbp, new_rsp);
rbp -= addr_size;
int length = System.Math.Min(code.Length, offset);
while (pos < length)
{
byte opcode = code [pos++];
long value;
if ((opcode == 0x41) && (pos < length))
{
byte opcode2 = code [pos++];
if ((opcode2 < 0x50) || (opcode2 > 0x57))
{
break;
}
switch (opcode2)
{
case 0x50: /* r8 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R8].SetValue(rbp, value);
break;
case 0x51: /* r9 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R9].SetValue(rbp, value);
break;
case 0x52: /* r10 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R10].SetValue(rbp, value);
break;
case 0x53: /* r11 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R11].SetValue(rbp, value);
break;
case 0x54: /* r12 */
value = (long)memory.ReadAddress(rbp).Address;
regs [(int)X86_Register.R12].SetValue(rbp, value);
break;
case 0x55: /* r13 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R13].SetValue(rbp, value);
break;
case 0x56: /* r14 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R14].SetValue(rbp, value);
break;
case 0x57: /* r15 */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.R15].SetValue(rbp, value);
break;
}
}
else
{
if ((opcode < 0x50) || (opcode > 0x57))
{
break;
}
switch (opcode)
{
case 0x50: /* rax */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.RAX].SetValue(rbp, value);
break;
case 0x51: /* rcx */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.RCX].SetValue(rbp, value);
break;
case 0x52: /* rdx */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.RDX].SetValue(rbp, value);
break;
case 0x53: /* rbx */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.RBX].SetValue(rbp, value);
break;
case 0x56: /* rsi */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.RSI].SetValue(rbp, value);
break;
case 0x57: /* rdi */
value = memory.ReadLongInteger(rbp);
regs [(int)X86_Register.RDI].SetValue(rbp, value);
break;
}
}
rbp -= addr_size;
}
return(CreateFrame(frame.Thread, FrameType.Normal, memory, new_rip, new_rsp, new_rbp, regs));
}