cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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stackprotector.h (768B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2
      3#ifndef _ASM_RISCV_STACKPROTECTOR_H
      4#define _ASM_RISCV_STACKPROTECTOR_H
      5
      6#include <linux/random.h>
      7#include <linux/version.h>
      8
      9extern unsigned long __stack_chk_guard;
     10
     11/*
     12 * Initialize the stackprotector canary value.
     13 *
     14 * NOTE: this must only be called from functions that never return,
     15 * and it must always be inlined.
     16 */
     17static __always_inline void boot_init_stack_canary(void)
     18{
     19	unsigned long canary;
     20
     21	/* Try to get a semi random initial value. */
     22	get_random_bytes(&canary, sizeof(canary));
     23	canary ^= LINUX_VERSION_CODE;
     24	canary &= CANARY_MASK;
     25
     26	current->stack_canary = canary;
     27	if (!IS_ENABLED(CONFIG_STACKPROTECTOR_PER_TASK))
     28		__stack_chk_guard = current->stack_canary;
     29}
     30#endif /* _ASM_RISCV_STACKPROTECTOR_H */