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| author | Leo Yan <leo.yan@linaro.org> | 2019-08-06 18:00:14 +0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-08-07 13:53:09 +0100 |
| commit | 42d038c4fb00f1ec1a4c4616784da4561385b628 (patch) | |
| tree | c8c5335e01986c073ae56ca1df94eeed5c13fe1e /arch/arm64/include/asm/ptrace.h | |
| parent | 45880f7b7b19e043ce0aaa4cb7d05369425c82fa (diff) | |
| download | linux-42d038c4fb00f1ec1a4c4616784da4561385b628.tar.bz2 | |
arm64: Add support for function error injection
Inspired by the commit 7cd01b08d35f ("powerpc: Add support for function
error injection"), this patch supports function error injection for
Arm64.
This patch mainly support two functions: one is regs_set_return_value()
which is used to overwrite the return value; the another function is
override_function_with_return() which is to override the probed
function returning and jump to its caller.
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/ptrace.h')
| -rw-r--r-- | arch/arm64/include/asm/ptrace.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index 1dcf63a9ac1f..fbebb411ae20 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -301,6 +301,11 @@ static inline unsigned long regs_return_value(struct pt_regs *regs) return regs->regs[0]; } +static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc) +{ + regs->regs[0] = rc; +} + /** * regs_get_kernel_argument() - get Nth function argument in kernel * @regs: pt_regs of that context |