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/* SPDX-License-Identifier: GPL-2.0-only */
#define pr_fmt(fmt) "stackprot: " fmt
#include <linux/printk.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <init.h>
#include <stdlib.h>
#ifdef __PBL__
#define STAGE "PBL"
#else
#define STAGE "barebox"
#endif
void __stack_chk_fail(void);
volatile ulong __stack_chk_guard = (ulong)(0xfeedf00ddeadbeef & ~0UL);
/*
* Called when gcc's -fstack-protector feature is used, and
* gcc detects corruption of the on-stack canary value
*/
noinstr void __stack_chk_fail(void)
{
panic("stack-protector: " STAGE " stack is corrupted in: %pS\n", _RET_IP_);
}
EXPORT_SYMBOL(__stack_chk_fail);
static __no_stack_protector int stackprot_randomize_guard(void)
{
ulong chk_guard;
int ret;
ret = get_crypto_bytes(&chk_guard, sizeof(chk_guard));
if (ret)
pr_warn("proceeding without randomized stack protector\n");
else
__stack_chk_guard = chk_guard;
return 0;
}
late_initcall(stackprot_randomize_guard);
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