Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH V2 04/41] x86/entry: Introduce __entry_text for entry code written in C | Date | Sun, 26 Sep 2021 23:08:01 +0800 |
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From: Lai Jiangshan <laijs@linux.alibaba.com>
Some entry code will be implemented in C files. We need __entry_text to set them in .entry.text section. __entry_text disables instruments 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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