1#@!#!123s

: / usr / share / systemtap / tapset / linux / powerpc /
Filename : sysc_execve.stp
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%( kernel_v < "3.7" %?
# execve _____________________________________________________
#
# In kernels < 3.7, sys_execve() was in arch-specific code (and had
# varying arguments). It was just a wrapper around generic
# do_execve(), but the wrapper could error out before calling
# do_execve(). So, we'll have to handle it in arch-specific tapset
# code to catch all calls.
#
#  int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
#	       unsigned long a3, unsigned long a4, unsigned long a5,
#	       struct pt_regs *regs)

@define _SYSCALL_EXECVE_NAME
%(
	name = "execve"
%)

@define _SYSCALL_EXECVE_ARGSTR
%(
	argstr = sprintf("%s, %s, %s", filename, args, env_str)
%)

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

# dw_execve _____________________________________________________

probe dw_syscall.execve = kernel.function("sys_execve").call
{
	@_SYSCALL_EXECVE_NAME
	filename = user_string_quoted($a0)
	args = __get_argv($a1, 0)
	env_str = __get_argv($a2, 0)
	@_SYSCALL_EXECVE_ARGSTR
}
probe dw_syscall.execve.return = kernel.function("sys_execve").return
{
	@_SYSCALL_EXECVE_NAME
	@SYSC_RETVALSTR($return)
}

# nd_execve _____________________________________________________

probe nd_syscall.execve = kprobe.function("sys_execve")
{
	@_SYSCALL_EXECVE_NAME
	filename = user_string_quoted(pointer_arg(1))
	args = __get_argv(pointer_arg(2), 0)
	env_str = __get_argv(pointer_arg(3), 0)
	@_SYSCALL_EXECVE_ARGSTR
}
probe nd_syscall.execve.return = kprobe.function("sys_execve").return
{
	@_SYSCALL_EXECVE_NAME
	@SYSC_RETVALSTR(returnval())
}

#
# In kernels < 3.7, sys_execve() was in arch-specific code (and had
# varying arguments). It was just a wrapper around generic
# do_execve(), but the wrapper could error out before calling
# do_execve(). So, we'll have to handle it in arch-specific tapset
# code to catch all calls.
# execve _____________________________________________________
#
#  long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
#		  unsigned long a3, unsigned long a4, unsigned long a5,
#		  struct pt_regs *regs)

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_compat_execve _____________________________________________________

probe dw_syscall.compat_execve = kernel.function("compat_sys_execve").call ?
{
	@_SYSCALL_EXECVE_NAME
	filename = user_string_quoted($a0)
	args = __get_compat_argv($a1, 0)
	env_str = __get_compat_argv($a2, 0)
	@_SYSCALL_EXECVE_ARGSTR
}
probe dw_syscall.compat_execve.return =
	kernel.function("compat_sys_execve").return ?
{
	@_SYSCALL_EXECVE_NAME
	@SYSC_RETVALSTR($return)
}

# nd_compat_execve _____________________________________________________

probe nd_syscall.compat_execve = kprobe.function("compat_sys_execve") ?
{
	@_SYSCALL_EXECVE_NAME
	filename = user_string_quoted(pointer_arg(1))
	args = __get_compat_argv(pointer_arg(2), 0)
	env_str = __get_compat_argv(pointer_arg(3), 0)
	@_SYSCALL_EXECVE_ARGSTR
}
probe nd_syscall.compat_execve.return =
	kprobe.function("compat_sys_execve").return ?
{
	@_SYSCALL_EXECVE_NAME
	@SYSC_RETVALSTR(returnval())
}
%)