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: / usr / share / systemtap / tapset / linux / s390 /
Filename : sysc_compat_truncate64.stp
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# truncate64 __________________________________________________
#
# COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path,
#			 u32, high, u32, low)
#

@define _SYSCALL_COMPAT_TRUNCATE64_NAME
%(
	name = "truncate"
%)

@define _SYSCALL_COMPAT_TRUNCATE64_ARGSTR
%(
	argstr = sprintf("%s, %d", path, length)
%)

probe syscall.compat_truncate64 = dw_syscall.compat_truncate64 !,
                                  nd_syscall.compat_truncate64 ? {}
probe syscall.compat_truncate64.return = dw_syscall.compat_truncate64.return !,
                                         nd_syscall.compat_truncate64.return ? {}

# dw_compat_truncate64 _____________________________________________________

probe dw_syscall.compat_truncate64 = kernel.function("sys32_truncate64").call ?,
	kernel.function("compat_sys_s390_truncate64").call ?
{
        @_SYSCALL_COMPAT_TRUNCATE64_NAME
	path_uaddr = @__pointer($path)
	path = user_string_quoted(path_uaddr)
        length = (($high << 32) | __uint32($low))
	@_SYSCALL_COMPAT_TRUNCATE64_ARGSTR
}
probe dw_syscall.compat_truncate64.return =
	kernel.function("sys32_truncate64").return ?,
	kernel.function("compat_sys_s390_truncate64").return ?
{
	@_SYSCALL_COMPAT_TRUNCATE64_NAME
	@SYSC_RETVALSTR($return)
}

# nd_compat_truncate64 _____________________________________________________

probe nd_syscall.compat_truncate64 = kprobe.function("sys32_truncate64") ?,
	kprobe.function("compat_sys_s390_truncate64") ?
{
	asmlinkage()
        @_SYSCALL_COMPAT_TRUNCATE64_NAME
	path_uaddr = pointer_arg(1)
	path = user_string_quoted(path_uaddr)
        length = ((uint_arg(2) << 32) | uint_arg(3))
	@_SYSCALL_COMPAT_TRUNCATE64_ARGSTR
}
probe nd_syscall.compat_truncate64.return =
	kprobe.function("sys32_truncate64").return ?,
	kprobe.function("compat_sys_s390_truncate64").return ?
{
	@_SYSCALL_COMPAT_TRUNCATE64_NAME
	@SYSC_RETVALSTR(returnval())
}