1#@!#!123s

: / usr / share / systemtap / tapset / linux / s390 /
Filename : sysc_compat_ftruncate64.stp
back
# ftruncate64 _________________________________________________
#
# COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high,
#			 u32, low)
#

@define _SYSCALL_COMPAT_FTRUNCATE64_NAME
%(
	name = "ftruncate"
%)

@define _SYSCALL_COMPAT_FTRUNCATE64_ARGSTR
%(
	argstr = sprintf("%d, %d", fd, length)
%)

probe syscall.compat_ftruncate64 = dw_syscall.compat_ftruncate64 !,
                                   nd_syscall.compat_ftruncate64 ? {}
probe syscall.compat_ftruncate64.return = dw_syscall.compat_ftruncate64.return !,
                                          nd_syscall.compat_ftruncate64.return ? {}

# dw_compat_ftruncate64 _____________________________________________________

probe dw_syscall.compat_ftruncate64 =
	kernel.function("sys32_ftruncate64").call ?,
	kernel.function("compat_sys_s390_ftruncate64").call ?
{
        @_SYSCALL_COMPAT_FTRUNCATE64_NAME
        fd = __int32($fd)
        length = (($high << 32) | __uint32($low))
        @_SYSCALL_COMPAT_FTRUNCATE64_ARGSTR
}
probe dw_syscall.compat_ftruncate64.return =
	kernel.function("sys32_ftruncate64").return ?,
	kernel.function("compat_sys_s390_ftruncate64").return ?
{
	@_SYSCALL_COMPAT_FTRUNCATE64_NAME
	@SYSC_RETVALSTR($return)
}

# nd_compat_ftruncate64 _____________________________________________________

probe nd_syscall.compat_ftruncate64 = kprobe.function("sys32_ftruncate64") ?,
	kprobe.function("compat_sys_s390_ftruncate64") ?
{
	asmlinkage()
        @_SYSCALL_COMPAT_FTRUNCATE64_NAME
        fd = int_arg(1)
        length = ((uint_arg(2) << 32) | uint_arg(3))
        @_SYSCALL_COMPAT_FTRUNCATE64_ARGSTR
}
probe nd_syscall.compat_ftruncate64.return =
	kprobe.function("sys32_ftruncate64").return ?,
	kprobe.function("compat_sys_s390_ftruncate64").return ?
{
	@_SYSCALL_COMPAT_FTRUNCATE64_NAME
	@SYSC_RETVALSTR(returnval())
}