Am Sonntag, den 16.12.2018, 09:13 -0700 schrieb Jeff Law: > It's also important to remember that not every target which uses > function descriptors uses the LSB. On some targets the LSB may switch > between modes (arm vs thumb for example). So on those targets the use > of descriptors may imply an even larger minimum alignment.
There is a similar mechanism for pointer-to-member-functions used by C++. Is this correct on aarch64? /* By default, the C++ compiler will use the lowest bit of the pointer to function to indicate a pointer-to-member-function points to a virtual member function. However, if FUNCTION_BOUNDARY indicates function addresses aren't always even, the lowest bit of the delta field will be used. */ #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION #define TARGET_PTRMEMFUNC_VBIT_LOCATION \ (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \ ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta) #endif Best, Martin
