diff options
Diffstat (limited to 'arch/s390/lib')
| -rw-r--r-- | arch/s390/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/lib/error-inject.c | 14 | ||||
| -rw-r--r-- | arch/s390/lib/test_unwind.c | 1 |
3 files changed, 17 insertions, 0 deletions
diff --git a/arch/s390/lib/Makefile b/arch/s390/lib/Makefile index 28fd66d558ff..678333936f78 100644 --- a/arch/s390/lib/Makefile +++ b/arch/s390/lib/Makefile @@ -14,3 +14,5 @@ KASAN_SANITIZE_uaccess.o := n obj-$(CONFIG_S390_UNWIND_SELFTEST) += test_unwind.o CFLAGS_test_unwind.o += -fno-optimize-sibling-calls + +lib-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o diff --git a/arch/s390/lib/error-inject.c b/arch/s390/lib/error-inject.c new file mode 100644 index 000000000000..8c9d4da87eef --- /dev/null +++ b/arch/s390/lib/error-inject.c @@ -0,0 +1,14 @@ +// 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); diff --git a/arch/s390/lib/test_unwind.c b/arch/s390/lib/test_unwind.c index 32b7a30b2485..eb382ceaa116 100644 --- a/arch/s390/lib/test_unwind.c +++ b/arch/s390/lib/test_unwind.c @@ -9,6 +9,7 @@ #include <linux/kallsyms.h> #include <linux/kthread.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/string.h> #include <linux/kprobes.h> #include <linux/wait.h> |