On Sat, Oct 26, 2024 at 7:14 AM Rong Xu <xur@xxxxxxxxxx> wrote: > > When the -ffunction-sections compiler option is enabled, each function > is placed in a separate section named .text.function_name rather than > putting all functions in a single .text section. > > However, using -function-sections can cause problems with the > linker script. The comments included in include/asm-generic/vmlinux.lds.h > note these issues.: > “TEXT_MAIN here will match .text.fixup and .text.unlikely if dead > code elimination is enabled, so these sections should be converted > to use ".." first.” > > It is unclear whether there is a straightforward method for converting > a suffix to "..". > > This patch modifies the order of subsections within the text output > section. Specifically, it repositions sections with certain fixed patterns > (for example .text.unlikely) before TEXT_MAIN, ensuring that they are > grouped and matched together. It also places .text.hot section at the > beginning of a page to help the TLB performance. The fixed patterns are currently listed in this order: .text.hot, .text_unlikely, .text.unknown, .text.asan. You reorder them to: .text.asan, .text.unknown, .text.unlikely, .text.hot I believe it is better to describe your thoughts about the reshuffling among the fixed pattern sections. Otherwise, It is unclear to me. -- Best Regards Masahiro Yamada
