Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH V3 07/49] x86/entry: Introduce __entry_text for entry code written in C | Date | Thu, 14 Oct 2021 11:33:30 +0800 |
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From: Lai Jiangshan <laijs@linux.alibaba.com>
Some entry code will be implemented in C files. __entry_text is needed to set them in .entry.text section. __entry_text disables instrumentation like noinstr, but it doesn't disable stack protector since not all compiler supported by kernel supporting function level granular attribute to disable stack protector. It will be disabled by C file level.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> --- arch/x86/include/asm/idtentry.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index 1345088e9902..6779def97591 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -11,6 +11,9 @@ #include <asm/irq_stack.h> +/* Entry code written in C. */ +#define __entry_text __noinstr_section(".entry.text") + /** * DECLARE_IDTENTRY - Declare functions for simple IDT entry points * No error code pushed by hardware -- 2.19.1.6.gb485710b
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