linux/arch/s390/lib/error-inject.c
Ilya Leoshkevich 73d6eb48d2 s390: enable HAVE_FUNCTION_ERROR_INJECTION
This kernel feature is required for enabling BPF_KPROBE_OVERRIDE.

Define override_function_with_return() and regs_set_return_value()
functions, and fix compile errors in syscall_wrapper.h.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2020-07-27 10:33:28 +02:00

15 lines
365 B
C

// SPDX-License-Identifier: GPL-2.0+
#include <asm/ptrace.h>
#include <linux/error-injection.h>
#include <linux/kprobes.h>
void override_function_with_return(struct pt_regs *regs)
{
/*
* Emulate 'br 14'. 'regs' is captured by kprobes on entry to some
* kernel function.
*/
regs->psw.addr = regs->gprs[14];
}
NOKPROBE_SYMBOL(override_function_with_return);