http://d.puremagic.com/issues/show_bug.cgi?id=9931
--- Comment #8 from Jacob Carlborg <[email protected]> 2013-04-16 23:38:53 PDT --- (In reply to comment #7) > Seems like OSX deviates from the SysV IA-32 ABI for memory struct returns. > The callee does NOT return the hidden pointer in EAX. > Instead the caller has to use the value passed as argument. I don't know if this is what you're but the the ABI documentation says: "When a function returns a structure or union larger than 8 bytes, the caller passes a pointer to appropriate storage as the first argument to the function." And: "The called function returns structures according to their aligned size. * Structures 1 or 2 bytes in size are placed in EAX. * Structures 4 or 8 bytes in size are placed in: EAX and EDX. * Structures of other sizes are placed at the address supplied by the caller. For example, the C++ language occasionally forces the compiler to return a value in memory when it would normally be returned in registers. See “Passing Arguments” for more information." http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/LowLevelABI/130-IA-32_Function_Calling_Conventions/IA32.html#//apple_ref/doc/uid/TP40002492-SW4 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
