diff options
| author |   Peter Zijlstra (Intel) <peterz@infradead.org> | 2022-09-03 15:11:53 +0200 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2022-09-16 22:16:48 +0200 |
| commit | 9440155ccb948f8e3ce5308907a2e7378799be60 (patch) | |
| tree | fa81b71d963b1d9ad87a5ced2571c932855cd035 /include/asm-generic/vmlinux.lds.h | |
| parent | bpf: Use bpf_capable() instead of CAP_SYS_ADMIN for blinding decision (diff) | |
| download | linux-dev-9440155ccb948f8e3ce5308907a2e7378799be60.tar.xz linux-dev-9440155ccb948f8e3ce5308907a2e7378799be60.zip | |
ftrace: Add HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
x86 will shortly start using -fpatchable-function-entry for purposes
other than ftrace, make sure the __patchable_function_entry section
isn't merged in the mcount_loc section.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220903131154.420467-2-jolsa@kernel.org
Diffstat (limited to 'include/asm-generic/vmlinux.lds.h')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 7515a465ec03..13b197ef0d63 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -154,6 +154,14 @@ #define MEM_DISCARD(sec) *(.mem##sec) #endif +#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE +#define KEEP_PATCHABLE KEEP(*(__patchable_function_entries)) +#define PATCHABLE_DISCARDS +#else +#define KEEP_PATCHABLE +#define PATCHABLE_DISCARDS *(__patchable_function_entries) +#endif + #ifdef CONFIG_FTRACE_MCOUNT_RECORD /* * The ftrace call sites are logged to a section whose name depends on the @@ -172,7 +180,7 @@ #define MCOUNT_REC() . = ALIGN(8); \ __start_mcount_loc = .; \ KEEP(*(__mcount_loc)) \ - KEEP(*(__patchable_function_entries)) \ + KEEP_PATCHABLE \ __stop_mcount_loc = .; \ ftrace_stub_graph = ftrace_stub; \ ftrace_ops_list_func = arch_ftrace_ops_list_func; @@ -1024,6 +1032,7 @@ #define COMMON_DISCARDS \ SANITIZER_DISCARDS \ + PATCHABLE_DISCARDS \ *(.discard) \ *(.discard.*) \ *(.modinfo) \ |