linux/include/trace/syscall.h
Gabriel Krisman Bertazi 524666cb5d tracepoints: Migrate to use SYSCALL_WORK flag
On architectures using the generic syscall entry code the architecture
independent syscall work is moved to flags in thread_info::syscall_work.
This removes architecture dependencies and frees up TIF bits.

Define SYSCALL_WORK_SYSCALL_TRACEPOINT, use it in the generic entry code
and convert the code which uses the TIF specific helper functions to use
the new *_syscall_work() helpers which either resolve to the new mode for
users of the generic entry code or to the TIF based functions for the other
architectures.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20201116174206.2639648-6-krisman@collabora.com
2020-11-16 21:53:15 +01:00

52 lines
1.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _TRACE_SYSCALL_H
#define _TRACE_SYSCALL_H
#include <linux/tracepoint.h>
#include <linux/unistd.h>
#include <linux/trace_events.h>
#include <linux/thread_info.h>
#include <asm/ptrace.h>
/*
* A syscall entry in the ftrace syscalls array.
*
* @name: name of the syscall
* @syscall_nr: number of the syscall
* @nb_args: number of parameters it takes
* @types: list of types as strings
* @args: list of args as strings (args[i] matches types[i])
* @enter_fields: list of fields for syscall_enter trace event
* @enter_event: associated syscall_enter trace event
* @exit_event: associated syscall_exit trace event
*/
struct syscall_metadata {
const char *name;
int syscall_nr;
int nb_args;
const char **types;
const char **args;
struct list_head enter_fields;
struct trace_event_call *enter_event;
struct trace_event_call *exit_event;
};
#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
static inline void syscall_tracepoint_update(struct task_struct *p)
{
if (test_syscall_work(SYSCALL_TRACEPOINT))
set_task_syscall_work(p, SYSCALL_TRACEPOINT);
else
clear_task_syscall_work(p, SYSCALL_TRACEPOINT);
}
#else
static inline void syscall_tracepoint_update(struct task_struct *p)
{
}
#endif
#endif /* _TRACE_SYSCALL_H */