linux/kernel/kallsyms_internal.h
Zhen Lei 19bd8981dc kallsyms: Reduce the memory occupied by kallsyms_seqs_of_names[]
kallsyms_seqs_of_names[] records the symbol index sorted by address, the
maximum value in kallsyms_seqs_of_names[] is the number of symbols. And
2^24 = 16777216, which means that three bytes are enough to store the
index. This can help us save (1 * kallsyms_num_syms) bytes of memory.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
2022-11-12 18:47:36 -08:00

31 lines
907 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef LINUX_KALLSYMS_INTERNAL_H_
#define LINUX_KALLSYMS_INTERNAL_H_
#include <linux/types.h>
/*
* These will be re-linked against their real values
* during the second link stage.
*/
extern const unsigned long kallsyms_addresses[] __weak;
extern const int kallsyms_offsets[] __weak;
extern const u8 kallsyms_names[] __weak;
/*
* Tell the compiler that the count isn't in the small data section if the arch
* has one (eg: FRV).
*/
extern const unsigned int kallsyms_num_syms
__section(".rodata") __attribute__((weak));
extern const unsigned long kallsyms_relative_base
__section(".rodata") __attribute__((weak));
extern const char kallsyms_token_table[] __weak;
extern const u16 kallsyms_token_index[] __weak;
extern const unsigned int kallsyms_markers[] __weak;
extern const u8 kallsyms_seqs_of_names[] __weak;
#endif // LINUX_KALLSYMS_INTERNAL_H_