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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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1234567891011121314151617181920212223242526272829303132333435363738394041/* SPDX-License-Identifier: GPL-2.0 *//* * GCC stack protector support. * * Stack protector works by putting predefined pattern at the start of * the stack frame and verifying that it hasn't been overwritten when * returning from the function. The pattern is called stack canary * and gcc expects it to be defined by a global variable called * "__stack_chk_guard" on ARM. This unfortunately means that on SMP * we cannot have a different canary value per task. */
#ifndef __ASM_STACKPROTECTOR_H#define __ASM_STACKPROTECTOR_H
#include <asm/pointer_auth.h>
extern unsigned long __stack_chk_guard;
/* * Initialize the stackprotector canary value. * * NOTE: this must only be called from functions that never return, * and it must always be inlined. */static __always_inline void boot_init_stack_canary(void){#if defined(CONFIG_STACKPROTECTOR) unsigned long canary = get_random_canary();
current->stack_canary = canary; if (!IS_ENABLED(CONFIG_STACKPROTECTOR_PER_TASK)) __stack_chk_guard = current->stack_canary;#endif ptrauth_thread_init_kernel(current); ptrauth_thread_switch_kernel(current); ptrauth_enable();}
#endif /* _ASM_STACKPROTECTOR_H */