It's all fun and games until you single-step into something like strchr: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/x86_64/multiarch/strchr-avx2.S

It's all fun and games until you single-step into something like strchr: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/x86_64/multiarch/strchr-avx2.S;h=3d4a659b93f32948b20393e1ab8eab9c8614ddb4;hb=HEAD https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/x86... (And that's the source: remember the disassembly will lack comments and macros.)