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ARM: 9279/1: support function error injection

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This enables HAVE_FUNCTION_ERROR_INJECTION by adding necessary
regs_set_return_value() and override_function_with_return().

Simply tested according to Documentation/fault-injection/fault-injection.rst.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Wang Kefeng 2022-12-04 04:46:40 +01:00 • committed by Russell King (Oracle)
parent ba290d4f1f
commit aaa4dd1b47
4 changed files with 17 additions and 0 deletions
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10
arch/arm/lib/error-inject.c Normal file
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// SPDX-License-Identifier: GPL-2.0
#include <linux/error-injection.h>
#include <linux/kprobes.h>
void override_function_with_return(struct pt_regs *regs)
{
instruction_pointer_set(regs, regs->ARM_lr);
}
NOKPROBE_SYMBOL(override_function_with_return);