https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113312
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to H. Peter Anvin from comment #3) > Created attachment 57032 [details] > FRED assembly entry stub (example, slightly modified from the Linux kernel) Can you do asm_fred_entry_\type: endbr64 push %rdi push %rsi push %rdx push %rax push %r8 push %r9 push %r10 push %r11 push %rbx push %rbp push %r12 push %r13 push %r14 push %r15 lea 15*8(%rsp),%rdi <<<<<< RDI will point to the event info after CALL. call fred_entry_\type /* call C code */ endbr64 pop %r15 pop %r14 pop %r13 pop %r12 pop %rbp pop %rbx pop %r11 pop %r10 pop %r9 pop %r8 pop %rax pop %rdx pop %rsi pop %rdi \eret