[Lldb-commits] [lldb] r226231 - Add comment regarding which i386 registers are non-volatile instead of

[Jason Molenda]

Author: jmolenda
Date: Thu Jan 15 18:27:25 2015
New Revision: 226231

URL: http://llvm.org/viewvc/llvm-project?rev=226231&view=rev
Log:
Add comment regarding which i386 registers are non-volatile instead of
just pointing to the standard document regarding this.

Modified:
    lldb/trunk/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.cpp

Modified: lldb/trunk/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.cpp?rev=226231&r1=226230&r2=226231&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.cpp (original)
+++ lldb/trunk/source/Plugins/ABI/MacOSX-i386/ABIMacOSX_i386.cpp Thu Jan 15 18:27:25 2015
@@ -786,6 +786,11 @@ ABIMacOSX_i386::RegisterIsVolatile (cons
 }
 
 // v. http://developer.apple.com/library/mac/#documentation/developertools/Conceptual/LowLevelABI/130-IA-32_Function_Calling_Conventions/IA32.html#//apple_ref/doc/uid/TP40002492-SW4
+//
+// This document ("OS X ABI Function Call Guide", chapter "IA-32 Function Calling Conventions")
+// says that the following registers on i386 are preserved aka non-volatile aka callee-saved:
+// 
+// ebx, ebp, esi, edi, esp
 
 bool
 ABIMacOSX_i386::RegisterIsCalleeSaved (const RegisterInfo *reg_info)