evie/android_kernel_oneplus_msm8998 - Gay Catgirls Forgejo: gay catgirls having sex

evie/android_kernel_oneplus_msm8998

24 lines

600 B

C

Raw Normal View History

arm64: Add ftrace support This patch implements arm64 specific part to support function tracers, such as function (CONFIG_FUNCTION_TRACER), function_graph (CONFIG_FUNCTION_GRAPH_TRACER) and function profiler (CONFIG_FUNCTION_PROFILER). With 'function' tracer, all the functions in the kernel are traced with timestamps in ${sysfs}/tracing/trace. If function_graph tracer is specified, call graph is generated. The kernel must be compiled with -pg option so that _mcount() is inserted at the beginning of functions. This function is called on every function's entry as long as tracing is enabled. In addition, function_graph tracer also needs to be able to probe function's exit. ftrace_graph_caller() & return_to_handler do this by faking link register's value to intercept function's return path. More details on architecture specific requirements are described in Documentation/trace/ftrace-design.txt. Reviewed-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> 2014-04-30 18:54:33 +09:00			`/*`
			`* arch/arm64/include/asm/ftrace.h`
			`*`
			`* Copyright (C) 2013 Linaro Limited`
			`* Author: AKASHI Takahiro <takahiro.akashi@linaro.org>`
			`*`
			`* This program is free software; you can redistribute it and/or modify`
			`* it under the terms of the GNU General Public License version 2 as`
			`* published by the Free Software Foundation.`
			`*/`
			`#ifndef __ASM_FTRACE_H`
			`#define __ASM_FTRACE_H`

			`#include <asm/insn.h>`

			`#define MCOUNT_ADDR ((unsigned long)_mcount)`
			`#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE`

			`#ifndef __ASSEMBLY__`
			`extern void _mcount(unsigned long);`
			`#endif /* __ASSEMBLY__ */`

			`#endif /* __ASM_FTRACE_H */`