Josh Poimboeuf ead1da2bba x86/ftrace: Remove OBJECT_FILES_NON_STANDARD usage ... [ Upstream commit 7b6c7a877c ] The file-wide OBJECT_FILES_NON_STANDARD annotation is used with CONFIG_FRAME_POINTER to tell objtool to skip the entire file when frame pointers are enabled. However that annotation is now deprecated because it doesn't work with IBT, where objtool runs on vmlinux.o instead of individual translation units. Instead, use more fine-grained function-specific annotations: - The 'save_mcount_regs' macro does funny things with the frame pointer. Use STACK_FRAME_NON_STANDARD_FP to tell objtool to ignore the functions using it. - The return_to_handler() "function" isn't actually a callable function. Instead of being called, it's returned to. The real return address isn't on the stack, so unwinding is already doomed no matter which unwinder is used. So just remove the STT_FUNC annotation, telling objtool to ignore it. That also removes the implicit ANNOTATE_NOENDBR, which now needs to be made explicit. Fixes the following warning: vmlinux.o: warning: objtool: __fentry__+0x16: return with modified stack frame Fixes: ed53a0d971 ("x86/alternative: Use .ibt_endbr_seal to seal indirect calls") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://lore.kernel.org/r/b7a7a42fe306aca37826043dac89e113a1acdbac.1654268610.git.jpoimboe@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-22 14:28:03 +02:00
..
asm	nds32: Remove the architecture	2022-03-07 13:54:59 +01:00
asm-generic	tools: sync tools/bitmap with mother linux	2022-01-15 08:47:31 -08:00
linux	x86/ftrace: Remove OBJECT_FILES_NON_STANDARD usage	2022-06-22 14:28:03 +02:00
nolibc	tools/nolibc: Implement gettid()	2021-11-30 17:26:42 -08:00
tools	tools: bpf: fix license for a compat header file	2018-09-19 23:49:58 +02:00
trace/events
uapi	tools headers UAPI: Sync linux/kvm.h with the kernel sources	2022-05-08 21:48:49 -03:00
vdso	tools headers: Synchronize linux/bits.h with the kernel sources	2020-04-14 11:40:05 -03:00