function _cgo_be59f0f25121_Cfunc_puts is implemented in a C source
file compiled by gcc, the file x.cgo2.c:

	void
	_cgo_be59f0f25121_Cfunc_puts(void *v)
	{
		struct {
			char* p0;
			int r;
			char __pad12[4];
		} __attribute__((__packed__, __gcc_struct__)) *a = v;
		a->r = puts((void*)a->p0);
	}

It extracts the arguments from the pointer to _Cfunc_puts's argument

			// Ignore field names that don't have the prefix we're
			// looking for. It is common in C headers to have fields
			// named, say, _pad in an otherwise prefixed header.
			// If the struct has 3 fields tv_sec, tv_usec, _pad1, then we
			// still want to remove the tv_ prefix.
			// The check for "orig_" here handles orig_eax in the
			// x86 ptrace register sets, which otherwise have all fields
			// with reg_ prefixes.