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|
# execve _____________________________________________________
# NB: kprocess.exec[_complete] is aliased to syscall.execve[.return]
%( kernel_v >= "3.7" %?
# In kernels >= 3.7, sys_execve() has been moved to generic code, so we
# can use it with confidence. For kernels < 3.7, execve support is in
# arch-specific tapset code.
#
# SYSCALL_DEFINE3(execve,
# const char __user *, filename,
# const char __user *const __user *, argv,
# const char __user *const __user *, envp)
@define _SYSCALL_EXECVE_NAME
%(
name = "execve"
%)
@define _SYSCALL_EXECVE_ARGSTR
%(
argstr = sprintf("%s, %s, %s", filename, args, env_str)
%)
@define _SYSCALL_EXECVE_REGARGS
%(
filename = user_string_quoted(pointer_arg(1))
args = __get_argv(pointer_arg(2), 0)
env_str = __get_argv(pointer_arg(3), 0)
%)
@define _SYSCALL_COMPAT_EXECVE_REGARGS
%(
filename = user_string_quoted(pointer_arg(1))
args = __get_compat_argv(pointer_arg(2), 0)
env_str = __get_compat_argv(pointer_arg(3), 0)
%)
probe syscall.execve = dw_syscall.execve !, nd_syscall.execve {}
probe syscall.execve.return = dw_syscall.execve.return !,
nd_syscall.execve.return {}
probe syscall.compat_execve = dw_syscall.compat_execve !,
nd_syscall.compat_execve ? {}
probe syscall.compat_execve.return = dw_syscall.compat_execve.return !,
nd_syscall.compat_execve.return ? {}
# dw_execve _____________________________________________________
probe dw_syscall.execve = kernel.function("sys_execve").call
{
@_SYSCALL_EXECVE_NAME
filename = user_string_quoted(@choose_defined($filename, $name))
# kernel 3.0 changed the pointer's name to __argv
__argv = @choose_defined($__argv, $argv)
args = __get_argv(__argv, 0)
__envp = @choose_defined($__envp, $envp)
env_str = __get_argv(__envp, 0)
@_SYSCALL_EXECVE_ARGSTR
}
probe dw_syscall.execve.return = kernel.function("sys_execve").return
{
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR($return)
}
# In kernels >= 3.7, compat_sys_execve() has been moved to generic
# code, so we can use it with confidence. For kernels < 3.7,
# compat_execve support is in arch-specific tapset code.
#
# asmlinkage long compat_sys_execve(const char __user * filename,
# const compat_uptr_t __user * argv,
# const compat_uptr_t __user * envp)
probe dw_syscall.compat_execve = kernel.function("compat_sys_execve").call ?
{
@_SYSCALL_EXECVE_NAME
filename = user_string_quoted(@__pointer($filename))
# kernel 3.0 changed the pointer's name to __argv
__argv = @__pointer(@choose_defined($__argv, $argv))
args = __get_compat_argv(__argv, 0)
__envp = @__pointer(@choose_defined($__envp, $envp))
env_str = __get_compat_argv(__envp, 0)
@_SYSCALL_EXECVE_ARGSTR
}
probe dw_syscall.compat_execve.return =
kernel.function("compat_sys_execve").return ?
{
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR($return)
}
# nd_execve _____________________________________________________
probe nd_syscall.execve = nd1_syscall.execve!, nd2_syscall.execve!, tp_syscall.execve
{ }
probe nd1_syscall.execve = kprobe.function("sys_execve")
{
@_SYSCALL_EXECVE_NAME
asmlinkage()
@_SYSCALL_EXECVE_REGARGS
@_SYSCALL_EXECVE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.execve = kprobe.function(@arch_syscall_prefix "sys_execve") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_EXECVE_NAME
@_SYSCALL_EXECVE_REGARGS
@_SYSCALL_EXECVE_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.execve = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_execve"))
@_SYSCALL_EXECVE_NAME
@_SYSCALL_EXECVE_REGARGS
@_SYSCALL_EXECVE_ARGSTR
}
probe nd_syscall.execve.return = nd1_syscall.execve.return!, nd2_syscall.execve.return!, tp_syscall.execve.return
{ }
probe nd1_syscall.execve.return = kprobe.function("sys_execve").return
{
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.execve.return = kprobe.function(@arch_syscall_prefix "sys_execve").return ?
{
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.execve.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_execve"))
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR($ret)
}
# In kernels >= 3.7, compat_sys_execve() has been moved to generic
# code, so we can use it with confidence. For kernels < 3.7,
# compat_execve support is in arch-specific tapset code.
#
# asmlinkage long compat_sys_execve(const char __user * filename,
# const compat_uptr_t __user * argv,
# const compat_uptr_t __user * envp)
probe nd_syscall.compat_execve = nd1_syscall.compat_execve!, nd2_syscall.compat_execve!, tp_syscall.compat_execve
{ }
probe nd1_syscall.compat_execve = kprobe.function("compat_sys_execve").call ?
{
@_SYSCALL_EXECVE_NAME
asmlinkage()
@_SYSCALL_COMPAT_EXECVE_REGARGS
@_SYSCALL_EXECVE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.compat_execve = kprobe.function(@arch_syscall_prefix "compat_sys_execve") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_EXECVE_NAME
@_SYSCALL_COMPAT_EXECVE_REGARGS
@_SYSCALL_EXECVE_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_execve = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_execve"))
@_SYSCALL_EXECVE_NAME
@_SYSCALL_COMPAT_EXECVE_REGARGS
@_SYSCALL_EXECVE_ARGSTR
}
probe nd_syscall.compat_execve.return = nd1_syscall.compat_execve.return!, nd2_syscall.compat_execve.return!, tp_syscall.compat_execve.return
{ }
probe nd1_syscall.compat_execve.return =
kprobe.function("compat_sys_execve").return ?
{
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.compat_execve.return = kprobe.function(@arch_syscall_prefix "compat_sys_execve").return ?
{
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_execve.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_execve"))
@_SYSCALL_EXECVE_NAME
@SYSC_RETVALSTR($ret)
}
%)
|
