ab0615e2d6
Use fixmaps for text patching when the kernel text is read-only, inspired by x86. This makes jump labels and kprobes work with the currently available CONFIG_DEBUG_SET_MODULE_RONX and the upcoming CONFIG_DEBUG_RODATA options. Signed-off-by: Rabin Vincent <rabin@rab.in> [kees: fixed up for merge with "arm: use generic fixmap.h"] [kees: added parse acquire/release annotations to pass C=1 builds] [kees: always use stop_machine to keep TLB flushing local] Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Nicolas Pitre <nico@linaro.org>
18 lines
399 B
C
18 lines
399 B
C
#ifndef _ARM_KERNEL_PATCH_H
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#define _ARM_KERNEL_PATCH_H
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void patch_text(void *addr, unsigned int insn);
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void __patch_text_real(void *addr, unsigned int insn, bool remap);
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static inline void __patch_text(void *addr, unsigned int insn)
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{
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__patch_text_real(addr, insn, true);
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}
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static inline void __patch_text_early(void *addr, unsigned int insn)
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{
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__patch_text_real(addr, insn, false);
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}
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#endif
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