Are there any good resources for learning about gcc's x86_64 assembly
output? When I run `gcc -S a.c` for a simple test C program like the
one below, I can completely understand the resulting go.s on a 32-bit
x86, but as soon as I run that on a 64-bit machine, I'm lost. I know
what the instructions are (i.e. I know how to use the AMD manuals),
but I'd like to learn about gcc's assembly output: the exact new
calling conventions (registers seem to be more liberally used over the
stack now even without opt), all these
.LFB/.LCFI/.LFE/.Lframe/.LSCIE/.LSFDE/.LASFDE/... labels, and so on.
Thanks in advance for any guidance.
void foo(int a, int b, int c) { char xs[5]; char ys[10]; }
int main() { foo(1,2,3); return 0; }