On Mon, Jul 29, 2024 at 5:54 PM Song Liu <song@xxxxxxxxxx> wrote: > > With CONFIG_LTO_CLANG, the compiler/linker adds .llvm.<hash> suffix to > local symbols to avoid duplications. Existing scripts/kallsyms sorts > symbols without .llvm.<hash> suffix. However, this causes quite some > issues later on. Some users of kallsyms, such as livepatch, have to match > symbols exactly; while other users, such as kprobe, would match symbols > without the suffix. > > Address this by sorting full symbols (with .llvm.<hash>) at build time, and > split kallsyms APIs to explicitly match full symbols or without suffix. > Specifically, exiting APIs will match symbols exactly. Two new APIs are > added to match symbols with suffix. Use the new APIs in tracing/kprobes. Forgot to mention: This is to follow up the discussions in this thread: https://lore.kernel.org/live-patching/20240605032120.3179157-1-song@xxxxxxxxxx/T/#u Thanks, Song
