linux/arch/arm/kernel/patch.h

#ifndef _ARM_KERNEL_PATCH_H
#define _ARM_KERNEL_PATCH_H

void patch_text(void *addr, unsigned int insn);
void __patch_text_real(void *addr, unsigned int insn, bool remap);

static inline void __patch_text(void *addr, unsigned int insn)
{
	__patch_text_real(addr, insn, true);
}

static inline void __patch_text_early(void *addr, unsigned int insn)
{
	__patch_text_real(addr, insn, false);
}

#endif
ARM: 7332/1: extract out code patch function from kprobes Extract out the code patching code from kprobes so that it can be used from the jump label code. Additionally, the separated code: - Uses the IS_ENABLED() macros instead of the #ifdefs for THUMB2 support - Unifies the two separate functions in kprobes, providing one function that uses stop_machine() internally, and one that can be called from stop_machine() directly - Patches the text on all CPUs only on processors requiring software broadcasting of cache operations Acked-by: Jon Medhurst <tixy@yxit.co.uk> Tested-by: Jon Medhurst <tixy@yxit.co.uk> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2012-02-18 16:50:51 +00:00			`#ifndef _ARM_KERNEL_PATCH_H`
			`#define _ARM_KERNEL_PATCH_H`

			`void patch_text(void *addr, unsigned int insn);`
arm: use fixmap for text patching when text is RO 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> 2014-04-24 21:28:57 +00:00			`void __patch_text_real(void *addr, unsigned int insn, bool remap);`

			`static inline void __patch_text(void *addr, unsigned int insn)`
			`{`
			`__patch_text_real(addr, insn, true);`
			`}`

			`static inline void __patch_text_early(void *addr, unsigned int insn)`
			`{`
			`__patch_text_real(addr, insn, false);`
			`}`
ARM: 7332/1: extract out code patch function from kprobes Extract out the code patching code from kprobes so that it can be used from the jump label code. Additionally, the separated code: - Uses the IS_ENABLED() macros instead of the #ifdefs for THUMB2 support - Unifies the two separate functions in kprobes, providing one function that uses stop_machine() internally, and one that can be called from stop_machine() directly - Patches the text on all CPUs only on processors requiring software broadcasting of cache operations Acked-by: Jon Medhurst <tixy@yxit.co.uk> Tested-by: Jon Medhurst <tixy@yxit.co.uk> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2012-02-18 16:50:51 +00:00
			`#endif`