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|
# read _______________________________________________________
# ssize_t sys_read(unsigned int fd, char __user * buf, size_t count)
@define _SYSCALL_READ_NAME
%(
name = "read"
%)
@define _SYSCALL_READ_ARGSTR
%(
argstr = sprintf("%d, %p, %u", fd, buf_uaddr, count)
%)
@define _SYSCALL_READ_REGARGS
%(
fd = int_arg(1)
buf_uaddr = pointer_arg(2)
count = ulong_arg(3)
%)
@define _SYSCALL_READ_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.read = dw_syscall.read !, nd_syscall.read { }
probe syscall.read.return = dw_syscall.read.return !, nd_syscall.read.return {}
# dw_read _____________________________________________________
probe dw_syscall.read =
%( arch == "s390" %?
__syscall.read, kernel.function("sys32_read").call ?,
kernel.function("compat_sys_s390_read").call ?
%:
__syscall.read
%)
{
@_SYSCALL_READ_NAME
fd = __int32($fd)
buf_uaddr = @__pointer($buf)
count = @__compat_ulong($count)
@_SYSCALL_READ_ARGSTR
}
probe __syscall.read = kernel.function("sys_read").call
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_read"))
%)
}
probe dw_syscall.read.return =
%( arch == "s390" %?
__syscall.read.return, kernel.function("sys32_read").return ?,
kernel.function("compat_sys_s390_read").return ?
%:
__syscall.read.return
%)
{
@_SYSCALL_READ_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.read.return = kernel.function("sys_read").return
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_read"))
%)
}
# nd_read _____________________________________________________
probe nd_syscall.read = nd1_syscall.read!, nd2_syscall.read!, tp_syscall.read
{ }
probe nd1_syscall.read =
%( arch == "s390" %?
__nd1_syscall.read, kprobe.function("sys32_read") ?,
kprobe.function("compat_sys_s390_read") ?
%:
__nd1_syscall.read
%)
{
@_SYSCALL_READ_NAME
asmlinkage()
@_SYSCALL_READ_REGARGS
@_SYSCALL_READ_ARGSTR
}
probe __nd1_syscall.read = kprobe.function("sys_read")
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_read"))
%)
}
/* kernel 4.17+ */
probe nd2_syscall.read = kprobe.function(@arch_syscall_prefix "sys_read")
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_READ_NAME
@_SYSCALL_READ_REGARGS
@_SYSCALL_READ_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_READ_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.read = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_read"), @const("__NR_compat_read"))
@_SYSCALL_READ_NAME
@_SYSCALL_READ_REGARGS
@_SYSCALL_READ_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_READ_REGARGS_STORE %)
}
probe nd_syscall.read.return = nd1_syscall.read.return!, nd2_syscall.read.return!, tp_syscall.read.return
{ }
probe nd1_syscall.read.return =
%( arch == "s390" %?
__nd1_syscall.read.return, kprobe.function("sys32_read").return ?,
kprobe.function("compat_sys_s390_read").return ?
%:
__nd1_syscall.read.return
%)
{
@_SYSCALL_READ_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.read.return = kprobe.function("sys_read").return
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_read"))
%)
}
/* kernel 4.17+ */
probe nd2_syscall.read.return = kprobe.function(@arch_syscall_prefix "sys_read").return
{
@_SYSCALL_READ_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.read.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_read"), @const("__NR_compat_read"))
@_SYSCALL_READ_NAME
@SYSC_RETVALSTR($ret)
}
|
