Messages in this thread Patch in this message | | | From | Huang Shijie <> | Subject | [PATCH 1/4] extable: add __sort_main_extable | Date | Wed, 22 Nov 2023 17:28:52 +0800 |
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The AmpereOne chip(arm64) may change the kernel exception table at boot time, so it needs to sort the kernel extable table during the kernel boot.
Introduce __sort_main_extable which is used to sort the kernel exception table.
Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> --- include/linux/extable.h | 2 ++ kernel/extable.c | 8 +++++++- 2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/include/linux/extable.h b/include/linux/extable.h index 4ab9e78f313b..ef70ec3633b0 100644 --- a/include/linux/extable.h +++ b/include/linux/extable.h @@ -15,6 +15,8 @@ search_extable(const struct exception_table_entry *base, void sort_extable(struct exception_table_entry *start, struct exception_table_entry *finish); void sort_main_extable(void); +void __sort_main_extable(void); + void trim_init_extable(struct module *m); /* Given an address, look for it in the exception tables */ diff --git a/kernel/extable.c b/kernel/extable.c index 71f482581cab..0fbe0ccb1c3a 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -32,13 +32,19 @@ extern struct exception_table_entry __stop___ex_table[]; /* Cleared by build time tools if the table is already sorted. */ u32 __initdata __visible main_extable_sort_needed = 1; +void __sort_main_extable(void) +{ + if (&__stop___ex_table > &__start___ex_table) + sort_extable(__start___ex_table, __stop___ex_table); +} + /* Sort the kernel's built-in exception table */ void __init sort_main_extable(void) { if (main_extable_sort_needed && &__stop___ex_table > &__start___ex_table) { pr_notice("Sorting __ex_table...\n"); - sort_extable(__start___ex_table, __stop___ex_table); + __sort_main_extable(); } } -- 2.40.1
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