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# readahead __________________________________________________
#
# asmlinkage ssize_t
# compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
# COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low,
# s32, count)
#
@define _SYSCALL_COMPAT_READAHEAD_NAME
%(
name = "readahead"
%)
@define _SYSCALL_COMPAT_READAHEAD_ARGSTR
%(
argstr = sprintf("%d, %d, %u", fd, offset, count)
%)
probe syscall.compat_readahead = dw_syscall.compat_readahead !,
nd_syscall.compat_readahead ? {}
probe syscall.compat_readahead.return = dw_syscall.compat_readahead.return !,
nd_syscall.compat_readahead.return ? {}
# dw_compat_readahead _____________________________________________________
probe dw_syscall.compat_readahead = kernel.function("sys32_readahead").call ?,
kernel.function("compat_sys_s390_readahead").call ?
{
@_SYSCALL_COMPAT_READAHEAD_NAME
fd = __int32($fd)
offset = ((@choose_defined($offhi, $high) << 32)
| __uint32(@choose_defined($offlo, $low)))
count = __uint32($count)
@_SYSCALL_COMPAT_READAHEAD_ARGSTR
}
probe dw_syscall.compat_readahead.return =
kernel.function("sys32_readahead").return ?,
kernel.function("compat_sys_s390_readahead").return ?
{
@_SYSCALL_COMPAT_READAHEAD_NAME
@SYSC_RETVALSTR($return)
}
# nd_compat_readahead _____________________________________________________
probe nd_syscall.compat_readahead = kprobe.function("sys32_readahead") ?,
kprobe.function("compat_sys_s390_readahead") ?
{
@_SYSCALL_COMPAT_READAHEAD_NAME
asmlinkage()
fd = int_arg(1)
offset = ((uint_arg(2) << 32) | uint_arg(3))
count = ulong_arg(4)
@_SYSCALL_COMPAT_READAHEAD_ARGSTR
}
probe nd_syscall.compat_readahead.return =
kprobe.function("sys32_readahead").return ?,
kprobe.function("compat_sys_s390_readahead").return ?
{
@_SYSCALL_COMPAT_READAHEAD_NAME
@SYSC_RETVALSTR(returnval())
}
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