| 1 |
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| 2 | #ifndef _TRACE_SYSCALL_H
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| 3 | #define _TRACE_SYSCALL_H
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| 4 |
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| 5 | #include <linux/tracepoint.h>
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| 6 | #include <linux/unistd.h>
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| 7 | #include <linux/trace_events.h>
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| 8 | #include <linux/thread_info.h>
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| 9 |
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| 10 | #include <asm/ptrace.h>
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| 11 |
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| 12 |
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| 13 | |
| 14 | * A syscall entry in the ftrace syscalls array.
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| 15 | *
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| 16 | * @name: name of the syscall
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| 17 | * @syscall_nr: number of the syscall
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| 18 | * @nb_args: number of parameters it takes
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| 19 | * @user_arg_is_str: set if the arg for @user_arg_size is a string
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| 20 | * @user_arg_size: holds @arg that has size of the user space to read
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| 21 | * @user_mask: mask of @args that will read user space
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| 22 | * @types: list of types as strings
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| 23 | * @args: list of args as strings (args[i] matches types[i])
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| 24 | * @enter_fields: list of fields for syscall_enter trace event
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| 25 | * @enter_event: associated syscall_enter trace event
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| 26 | * @exit_event: associated syscall_exit trace event
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| 27 |
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| 28 | struct syscall_metadata {
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| 29 | const char *name;
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| 30 | int syscall_nr;
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| 31 | u8 nb_args:7;
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| 32 | u8 user_arg_is_str:1;
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| 33 | s8 user_arg_size;
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| 34 | short user_mask;
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| 35 | const char **types;
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| 36 | const char **args;
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| 37 | struct list_head enter_fields;
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| 38 |
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| 39 | struct trace_event_call *enter_event;
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| 40 | struct trace_event_call *exit_event;
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| 41 | };
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| 42 |
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| 43 | #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
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| 44 | static inline void syscall_tracepoint_update(struct task_struct *p)
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| 45 | {
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| 46 | if (test_syscall_work(SYSCALL_TRACEPOINT))
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| 47 | set_task_syscall_work(p, SYSCALL_TRACEPOINT);
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| 48 | else
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| 49 | clear_task_syscall_work(p, SYSCALL_TRACEPOINT);
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| 50 | }
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| 51 | #else
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| 52 | static inline void syscall_tracepoint_update(struct task_struct *p)
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| 53 | {
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| 54 | }
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| 55 | #endif
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| 56 |
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| 57 | #endif
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