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Name	Size	Permission
aux_syscalls.stp	3.58 KB	-rw-r--r--
sysc_arch_prctl.stp	3.21 KB	-rw-r--r--
sysc_compat_execve.stp	1.59 KB	-rw-r--r--
sysc_compat_fadvise64.stp	6.92 KB	-rw-r--r--
sysc_compat_fallocate.stp	3.54 KB	-rw-r--r--
sysc_compat_ftruncate64.stp	3.34 KB	-rw-r--r--
sysc_compat_lookup_dcookie.stp	3.72 KB	-rw-r--r--
sysc_compat_readahead.stp	3.18 KB	-rw-r--r--
sysc_compat_truncate64.stp	3.45 KB	-rw-r--r--
sysc_execve.stp	1.62 KB	-rw-r--r--
sysc_get_thread_area.stp	3.18 KB	-rw-r--r--
sysc_iopl.stp	2.27 KB	-rw-r--r--
sysc_mmap.stp	4.04 KB	-rw-r--r--
sysc_mmap2.stp	2.62 KB	-rw-r--r--
sysc_pipe32.stp	1.54 KB	-rw-r--r--
sysc_set_thread_area.stp	3.13 KB	-rw-r--r--
sysc_sigaltstack.stp	2.24 KB	-rw-r--r--
sysc_sysctl32.stp	1.12 KB	-rw-r--r--
sysc_vm86_warning.stp	1.17 KB	-rw-r--r--
syscall_num.stp	53.77 KB	-rw-r--r--

Code Editor : sysc_iopl.stp

# iopl _______________________________________________________
# long sys_iopl(unsigned int level, struct pt_regs *regs);
# NOTE. This function is only in i386 and x86_64 and its args vary
# between those two archs.
#

@define _SYSCALL_IOPL_NAME
%(
	name = "iopl"
%)

@define _SYSCALL_IOPL_ARGSTR
%(
	argstr = sprint(level)
%)

@define _SYSCALL_IOPL_REGARGS
%(
	level = uint_arg(1)
%)

probe syscall.iopl = dw_syscall.iopl !, nd_syscall.iopl {}
probe syscall.iopl.return = dw_syscall.iopl.return !, nd_syscall.iopl.return {}

# dw_iopl _____________________________________________________

probe dw_syscall.iopl = kernel.function("sys_iopl")
{
	@_SYSCALL_IOPL_NAME
	level = __uint32(@choose_defined($level, $new_iopl))
	@_SYSCALL_IOPL_ARGSTR
}
probe dw_syscall.iopl.return = kernel.function("sys_iopl").return
{
	@_SYSCALL_IOPL_NAME
	@SYSC_RETVALSTR($return)
}

# nd_iopl _____________________________________________________

probe nd_syscall.iopl = nd1_syscall.iopl!, nd2_syscall.iopl!, tp_syscall.iopl
  { }

probe nd1_syscall.iopl = kprobe.function("sys_iopl")
{
	@_SYSCALL_IOPL_NAME
	asmlinkage()
	@_SYSCALL_IOPL_REGARGS
	@_SYSCALL_IOPL_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.iopl = kprobe.function(@arch_syscall_prefix "sys_iopl") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_IOPL_NAME
	@_SYSCALL_IOPL_REGARGS
	@_SYSCALL_IOPL_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.iopl = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_iopl"), @const("__NR_ia32_iopl"))
	@_SYSCALL_IOPL_NAME
	@_SYSCALL_IOPL_REGARGS
	@_SYSCALL_IOPL_ARGSTR
}

probe nd_syscall.iopl.return = nd1_syscall.iopl.return!, nd2_syscall.iopl.return!, tp_syscall.iopl.return
  { }
  
probe nd1_syscall.iopl.return = kprobe.function("sys_iopl").return
{
	@_SYSCALL_IOPL_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.iopl.return = kprobe.function(@arch_syscall_prefix "sys_iopl").return ?
{
	@_SYSCALL_IOPL_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.iopl.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_iopl"), @const("__NR_ia32_iopl"))
	@_SYSCALL_IOPL_NAME
	@SYSC_RETVALSTR($ret)
}

${this.title}

Code Editor : sysc_iopl.stp