forked from mirrors/linux
45880f7b7b
The function override_function_with_return() is defined separately for each architecture and every architecture's definition is almost same with each other. E.g. x86 and powerpc both define function in its own asm/error-injection.h header and override_function_with_return() has the same definition, the only difference is that x86 defines an extra function just_return_func() but it is specific for x86 and is only used by x86's override_function_with_return(), so don't need to export this function. This patch consolidates override_function_with_return() definition into asm-generic/error-injection.h header, thus all architectures can use the common definition. As result, the architecture specific headers are removed; the include/linux/error-injection.h header also changes to include asm-generic/error-injection.h header rather than architecture header, furthermore, it includes linux/compiler.h for successful compilation. Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Will Deacon <will@kernel.org>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_GENERIC_ERROR_INJECTION_H
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#define _ASM_GENERIC_ERROR_INJECTION_H
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#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
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enum {
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EI_ETYPE_NONE, /* Dummy value for undefined case */
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EI_ETYPE_NULL, /* Return NULL if failure */
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EI_ETYPE_ERRNO, /* Return -ERRNO if failure */
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EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */
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EI_ETYPE_TRUE, /* Return true if failure */
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};
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struct error_injection_entry {
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unsigned long addr;
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int etype;
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};
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struct pt_regs;
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#ifdef CONFIG_FUNCTION_ERROR_INJECTION
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/*
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* Whitelist ganerating macro. Specify functions which can be
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* error-injectable using this macro.
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*/
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#define ALLOW_ERROR_INJECTION(fname, _etype) \
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static struct error_injection_entry __used \
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__attribute__((__section__("_error_injection_whitelist"))) \
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_eil_addr_##fname = { \
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.addr = (unsigned long)fname, \
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.etype = EI_ETYPE_##_etype, \
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};
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void override_function_with_return(struct pt_regs *regs);
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#else
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#define ALLOW_ERROR_INJECTION(fname, _etype)
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static inline void override_function_with_return(struct pt_regs *regs) { }
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#endif
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#endif
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#endif /* _ASM_GENERIC_ERROR_INJECTION_H */
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