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# pwrite64 ___________________________________________________
#
# ssize_t sys_pwrite64(unsigned int fd,
# const char __user *buf,
# size_t count,
# loff_t pos)
#
@define _SYSCALL_PWRITE_NAME
%(
name = "pwrite"
%)
@define _SYSCALL_PWRITE_ARGSTR
%(
argstr = sprintf("%d, %s, %u, %d", fd, buf_str, count, offset)
%)
@define _SYSCALL_PWRITE_REGARGS
%(
fd = int_arg(1)
buf_uaddr = pointer_arg(2)
count = ulong_arg(3)
buf_str = user_buffer_quoted(buf_uaddr, count, syscall_string_trunc)
%)
@define _SYSCALL_PWRITE_REGARGS_STORE
%(
if (@probewrite(fd))
set_int_arg(1, fd)
if (@probewrite(buf_uaddr))
set_pointer_arg(2, buf_uaddr)
if (@probewrite(count))
set_ulong_arg(3, count)
%)
probe syscall.pwrite = dw_syscall.pwrite !, nd_syscall.pwrite ? {}
probe syscall.pwrite.return = dw_syscall.pwrite.return !,
nd_syscall.pwrite.return ? {}
# dw_pwrite _____________________________________________________
probe dw_syscall.pwrite = kernel.function("sys_pwrite64").call
{
%( arch == "s390" || arch == "x86_64" %?
@__syscall_gate(@const("__NR_pwrite64"))
%)
@_SYSCALL_PWRITE_NAME
fd = __int32($fd)
buf_uaddr = $buf
count = @__compat_ulong($count)
buf_str = user_buffer_quoted(buf_uaddr, count, syscall_string_trunc)
offset = $pos
@_SYSCALL_PWRITE_ARGSTR
}
probe dw_syscall.pwrite.return = kernel.function("sys_pwrite64").return
{
%( arch == "s390" || arch == "x86_64" %?
@__syscall_gate(@const("__NR_pwrite64"))
%)
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR($return)
}
# nd_pwrite _____________________________________________________
probe nd_syscall.pwrite = nd1_syscall.pwrite!, nd2_syscall.pwrite!, tp_syscall.pwrite
{ }
probe nd1_syscall.pwrite = kprobe.function("sys_pwrite64") ?
{
%( arch == "s390" || arch == "x86_64" %?
@__syscall_gate(@const("__NR_pwrite64"))
%)
@_SYSCALL_PWRITE_NAME
asmlinkage()
@_SYSCALL_PWRITE_REGARGS
offset = longlong_arg(4)
@_SYSCALL_PWRITE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.pwrite = kprobe.function(@arch_syscall_prefix "sys_pwrite64") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_PWRITE_NAME
@_SYSCALL_PWRITE_REGARGS
offset = longlong_arg(4)
@_SYSCALL_PWRITE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %?
@_SYSCALL_PWRITE_REGARGS_STORE
if (@probewrite(offset))
set_longlong_arg(4, offset)
%)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.pwrite = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_pwrite64"))
@_SYSCALL_PWRITE_NAME
@_SYSCALL_PWRITE_REGARGS
offset = longlong_arg(4)
@_SYSCALL_PWRITE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %?
@_SYSCALL_PWRITE_REGARGS_STORE
if (@probewrite(offset))
set_longlong_arg(4, offset)
%)
}
probe nd_syscall.pwrite.return = nd1_syscall.pwrite.return!, nd2_syscall.pwrite.return!, tp_syscall.pwrite.return
{ }
probe nd1_syscall.pwrite.return = kprobe.function("sys_pwrite64").return ?
{
%( arch == "s390" || arch == "x86_64" %?
@__syscall_gate(@const("__NR_pwrite64"))
%)
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.pwrite.return = kprobe.function(@arch_syscall_prefix "sys_pwrite64").return ?
{
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.pwrite.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_pwrite64"))
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR($ret)
}
# long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
# size_t count, u32 poshi, u32 poslo)
# COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd,
# const char __user *, ubuf,
# compat_size_t, count, u32, high, u32, low)
probe syscall.pwrite32 = dw_syscall.pwrite32 !, nd_syscall.pwrite32 ? {}
probe syscall.pwrite32.return = dw_syscall.pwrite32.return !,
nd_syscall.pwrite32.return ? {}
# dw_pwrite32 _____________________________________________________
probe dw_syscall.pwrite32 =
%( arch == "s390" %?
kernel.function("compat_sys_s390_pwrite64").call ?,
%)
%( arch == "x86_64" %?
kernel.function("compat_sys_x86_pwrite64").call ?,
%)
kernel.function("sys32_pwrite64").call ?
{
@_SYSCALL_PWRITE_NAME
fd = __int32($fd)
count = @__compat_ulong($count)
offset = ((@choose_defined($poshi, $high) << 32)
+ __uint32(@choose_defined($poslo, $low)))
buf_uaddr = @__pointer(@choose_defined($buf, $ubuf))
buf_str = user_buffer_quoted(buf_uaddr, count, syscall_string_trunc)
@_SYSCALL_PWRITE_ARGSTR
}
probe dw_syscall.pwrite32.return =
%( arch == "s390" %?
kernel.function("compat_sys_s390_pwrite64").return ?,
%)
%( arch == "x86_64" %?
kernel.function("compat_sys_x86_pwrite64").return ?,
%)
kernel.function("sys32_pwrite64").return ?
{
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR($return)
}
# nd_pwrite32 _____________________________________________________
probe nd_syscall.pwrite32 = nd1_syscall.pwrite32!, nd2_syscall.pwrite32!, tp_syscall.pwrite32
{ }
probe nd1_syscall.pwrite32 =
%( arch == "s390" %?
kprobe.function("compat_sys_s390_pwrite64") ?,
%)
%( arch == "x86_64" %?
kprobe.function("compat_sys_x86_pwrite64") ?,
%)
kprobe.function("sys32_pwrite64") ?
{
@_SYSCALL_PWRITE_NAME
asmlinkage()
@_SYSCALL_PWRITE_REGARGS
offset = (u32_arg(4) << 32) + u32_arg(5)
@_SYSCALL_PWRITE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.pwrite32 = kprobe.function(@arch_syscall_prefix "compat_sys_x86_pwrite") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_PWRITE_NAME
@_SYSCALL_PWRITE_REGARGS
offset = (u32_arg(5) << 32) + u32_arg(4)
@_SYSCALL_PWRITE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %?
@_SYSCALL_PWRITE_REGARGS_STORE
if (@probewrite(offset)) {
set_u32_arg(4, offset & 0xffffffff)
set_u32_arg(5, offset >> 32)
}
%)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.pwrite32 = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_pwrite64"))
@_SYSCALL_PWRITE_NAME
@_SYSCALL_PWRITE_REGARGS
offset = (u32_arg(5) << 32) + u32_arg(4)
@_SYSCALL_PWRITE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %?
@_SYSCALL_PWRITE_REGARGS_STORE
if (@probewrite(offset)) {
set_u32_arg(4, offset & 0xffffffff)
set_u32_arg(5, offset >> 32)
}
%)
}
probe nd_syscall.pwrite32.return = nd1_syscall.pwrite32.return!, nd2_syscall.pwrite32.return!, tp_syscall.pwrite32.return
{ }
probe nd1_syscall.pwrite32.return =
%( arch == "s390" %?
kprobe.function("compat_sys_s390_pwrite64").return ?,
%)
%( arch == "x86_64" %?
kprobe.function("compat_sys_x86_pwrite64").return ?,
%)
kprobe.function("sys32_pwrite64").return ?
{
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.pwrite32.return =
kprobe.function(@arch_syscall_prefix "compat_sys_x86_pwrite").return ?
{
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.pwrite32.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_pwrite64"))
@_SYSCALL_PWRITE_NAME
@SYSC_RETVALSTR($ret)
}