There's an Intel ABI specification that GCC closely follows. The gcc implementation is called libitm and their specification is just listed as a diff of intel's

There's an Intel ABI specification that GCC closely follows. The gcc implementation is called libitm and their specification is just listed as a diff of intel's specification. Here is gcc's doc on libitm https://gcc.gnu.org/onlinedocs/libitm/ https://gcc.gnu.org/onlinedocs/libitm/ Here is intel's document (much more useful): https://gcc.gnu.org/wiki/TransactionalMemory?action=AttachFile&do=get&target=Intel-TM-ABI-1_1_20060506.pdf https://gcc.gnu.org/wiki/TransactionalMemory?action=AttachFi... I'm not sure what the support story is like on clang.