mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 19:01:37 +00:00
819e50e25d
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>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
|
|
* Based on arch/arm/kernel/armksyms.c
|
|
*
|
|
* Copyright (C) 2000 Russell King
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/string.h>
|
|
#include <linux/cryptohash.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/in6.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/checksum.h>
|
|
|
|
EXPORT_SYMBOL(copy_page);
|
|
EXPORT_SYMBOL(clear_page);
|
|
|
|
/* user mem (segment) */
|
|
EXPORT_SYMBOL(__copy_from_user);
|
|
EXPORT_SYMBOL(__copy_to_user);
|
|
EXPORT_SYMBOL(__clear_user);
|
|
EXPORT_SYMBOL(__copy_in_user);
|
|
|
|
/* physical memory */
|
|
EXPORT_SYMBOL(memstart_addr);
|
|
|
|
/* string / mem functions */
|
|
EXPORT_SYMBOL(strchr);
|
|
EXPORT_SYMBOL(strrchr);
|
|
EXPORT_SYMBOL(strcmp);
|
|
EXPORT_SYMBOL(strncmp);
|
|
EXPORT_SYMBOL(strlen);
|
|
EXPORT_SYMBOL(strnlen);
|
|
EXPORT_SYMBOL(memset);
|
|
EXPORT_SYMBOL(memcpy);
|
|
EXPORT_SYMBOL(memmove);
|
|
EXPORT_SYMBOL(memchr);
|
|
EXPORT_SYMBOL(memcmp);
|
|
|
|
/* atomic bitops */
|
|
EXPORT_SYMBOL(set_bit);
|
|
EXPORT_SYMBOL(test_and_set_bit);
|
|
EXPORT_SYMBOL(clear_bit);
|
|
EXPORT_SYMBOL(test_and_clear_bit);
|
|
EXPORT_SYMBOL(change_bit);
|
|
EXPORT_SYMBOL(test_and_change_bit);
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
EXPORT_SYMBOL(_mcount);
|
|
#endif
|