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# perf_event_open ____________________________________________
#
# SYSCALL_DEFINE5(perf_event_open,
# struct perf_event_attr __user *, attr_uptr,
# pid_t, pid, int, cpu, int, group_fd, unsigned long, flags)
@define _SYSCALL_PERF_EVENT_OPEN_NAME
%(
name = "perf_event_open"
%)
@define _SYSCALL_PERF_EVENT_OPEN_ARGSTR
%(
argstr = sprintf("%p, %d, %d, %d, %s", attr_uaddr, pid, cpu, group_fd, flags_str)
%)
@define _SYSCALL_PERF_EVENT_OPEN_REGARGS
%(
attr_uaddr = pointer_arg(1)
pid = int_arg(2)
cpu = int_arg(3)
group_fd = int_arg(4)
flags = ulong_arg(5)
flags_str = _perf_event_open_flags_str(flags)
%)
probe syscall.perf_event_open = dw_syscall.perf_event_open !,
nd_syscall.perf_event_open ? {}
probe syscall.perf_event_open.return = dw_syscall.perf_event_open.return !,
nd_syscall.perf_event_open.return ? {}
# dw_perf_event_open _____________________________________________________
probe dw_syscall.perf_event_open = kernel.function("sys_perf_event_open").call ?
{
@_SYSCALL_PERF_EVENT_OPEN_NAME
attr_uaddr = $attr_uptr
pid = __int32($pid)
cpu = __int32($cpu)
group_fd = __int32($group_fd)
flags = @__compat_ulong($flags)
flags_str = _perf_event_open_flags_str(flags)
@_SYSCALL_PERF_EVENT_OPEN_ARGSTR
}
probe dw_syscall.perf_event_open.return =
kernel.function("sys_perf_event_open").return ?
{
@_SYSCALL_PERF_EVENT_OPEN_NAME
@SYSC_RETVALSTR($return)
}
# nd_perf_event_open _____________________________________________________
probe nd_syscall.perf_event_open = nd1_syscall.perf_event_open!, nd2_syscall.perf_event_open!, tp_syscall.perf_event_open
{ }
probe nd1_syscall.perf_event_open = kprobe.function("sys_perf_event_open") ?
{
@_SYSCALL_PERF_EVENT_OPEN_NAME
asmlinkage()
@_SYSCALL_PERF_EVENT_OPEN_REGARGS
@_SYSCALL_PERF_EVENT_OPEN_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.perf_event_open = kprobe.function(@arch_syscall_prefix "sys_perf_event_open") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_PERF_EVENT_OPEN_NAME
@_SYSCALL_PERF_EVENT_OPEN_REGARGS
@_SYSCALL_PERF_EVENT_OPEN_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.perf_event_open = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_perf_event_open"), @const("__NR_compat_perf_event_open"))
@_SYSCALL_PERF_EVENT_OPEN_NAME
@_SYSCALL_PERF_EVENT_OPEN_REGARGS
@_SYSCALL_PERF_EVENT_OPEN_ARGSTR
}
probe nd_syscall.perf_event_open.return = nd1_syscall.perf_event_open.return!, nd2_syscall.perf_event_open.return!, tp_syscall.perf_event_open.return
{ }
probe nd1_syscall.perf_event_open.return =
kprobe.function("sys_perf_event_open").return ?
{
@_SYSCALL_PERF_EVENT_OPEN_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.perf_event_open.return = kprobe.function(@arch_syscall_prefix "sys_perf_event_open").return ?
{
@_SYSCALL_PERF_EVENT_OPEN_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.perf_event_open.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_perf_event_open"), @const("__NR_compat_perf_event_open"))
@_SYSCALL_PERF_EVENT_OPEN_NAME
@SYSC_RETVALSTR($ret)
}
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