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|
# write ______________________________________________________
#
# ssize_t sys_write(unsigned int fd,
# const char __user * buf,
# size_t count)
#
@define _SYSCALL_WRITE_NAME
%(
name = "write"
%)
@define _SYSCALL_WRITE_ARGSTR
%(
argstr = sprintf("%d, %s, %u", fd, buf_str, count)
%)
@define _SYSCALL_WRITE_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)
%)
probe syscall.write = dw_syscall.write !, nd_syscall.write ? {}
probe syscall.write.return = dw_syscall.write.return !, nd_syscall.write.return ? {}
# dw_write _____________________________________________________
probe dw_syscall.write =
%( arch == "s390" %?
__syscall.write, kernel.function("sys32_write").call ?,
kernel.function("compat_sys_s390_write").call ?
%:
__syscall.write
%)
{
@_SYSCALL_WRITE_NAME
fd = __int32($fd)
buf_uaddr = $buf
count = @__compat_ulong($count)
buf_str = user_buffer_quoted(buf_uaddr, count, syscall_string_trunc)
@_SYSCALL_WRITE_ARGSTR
}
probe __syscall.write = kernel.function("sys_write").call
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_write"))
%)
}
probe dw_syscall.write.return =
%( arch == "s390" %?
__syscall.write.return, kernel.function("sys32_write").return ?,
kernel.function("compat_sys_s390_write").return ?
%:
__syscall.write.return
%)
{
@_SYSCALL_WRITE_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.write.return = kernel.function("sys_write").return
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_write"))
%)
}
# nd_write _____________________________________________________
probe nd_syscall.write = nd1_syscall.write!, nd2_syscall.write!, tp_syscall.write
{ }
probe nd1_syscall.write =
%( arch == "s390" %?
__nd1_syscall.write, kprobe.function("sys32_write") ?,
kprobe.function("compat_sys_s390_write") ?
%:
__nd1_syscall.write
%)
{
@_SYSCALL_WRITE_NAME
asmlinkage()
@_SYSCALL_WRITE_REGARGS
@_SYSCALL_WRITE_ARGSTR
}
probe __nd1_syscall.write = kprobe.function("sys_write")
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_write"))
%)
}
/* kernel 4.17+ */
probe nd2_syscall.write = kprobe.function(@arch_syscall_prefix "sys_write")
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_WRITE_NAME
@_SYSCALL_WRITE_REGARGS
@_SYSCALL_WRITE_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.write = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_write"), @const("__NR_compat_write"))
@_SYSCALL_WRITE_NAME
@_SYSCALL_WRITE_REGARGS
@_SYSCALL_WRITE_ARGSTR
}
probe nd_syscall.write.return = nd1_syscall.write.return!, nd2_syscall.write.return!, tp_syscall.write.return
{ }
probe nd1_syscall.write.return =
%( arch == "s390" %?
__nd1_syscall.write.return, kprobe.function("sys32_write").return ?,
kprobe.function("compat_sys_s390_write").return ?
%:
__nd1_syscall.write.return
%)
{
@_SYSCALL_WRITE_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.write.return = kprobe.function("sys_write").return
{
%( arch == "s390" %?
@__syscall_gate(@const("__NR_write"))
%)
}
/* kernel 4.17+ */
probe nd2_syscall.write.return = kprobe.function(@arch_syscall_prefix "sys_write").return
{
@_SYSCALL_WRITE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.write.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_write"), @const("__NR_compat_write"))
@_SYSCALL_WRITE_NAME
@SYSC_RETVALSTR($ret)
}
|
