관리-도구
편집 파일: sysc_msync.stp
# msync ______________________________________________________ # long sys_msync(unsigned long start, size_t len, int flags) @define _SYSCALL_MSYNC_NAME %( name = "msync" %) @define _SYSCALL_MSYNC_ARGSTR %( argstr = sprintf("%p, %u, %s", start, length, flags_str) %) @define _SYSCALL_MSYNC_REGARGS %( start = ulong_arg(1) length = ulong_arg(2) flags = int_arg(3) flags_str = _msync_flag_str(flags) %) probe syscall.msync = dw_syscall.msync !, nd_syscall.msync ? {} probe syscall.msync.return = dw_syscall.msync.return !, nd_syscall.msync.return ? {} # dw_msync _____________________________________________________ probe dw_syscall.msync = kernel.function("sys_msync").call ? { @_SYSCALL_MSYNC_NAME start = $start length = __ulong($len) flags = __int32($flags) flags_str = _msync_flag_str(flags) @_SYSCALL_MSYNC_ARGSTR } probe dw_syscall.msync.return = kernel.function("sys_msync").return ? { @_SYSCALL_MSYNC_NAME @SYSC_RETVALSTR($return) } # nd_msync _____________________________________________________ probe nd_syscall.msync = nd1_syscall.msync!, nd2_syscall.msync!, tp_syscall.msync { } probe nd1_syscall.msync = kprobe.function("sys_msync") ? { @_SYSCALL_MSYNC_NAME asmlinkage() @_SYSCALL_MSYNC_REGARGS @_SYSCALL_MSYNC_ARGSTR } /* kernel 4.17+ */ probe nd2_syscall.msync = kprobe.function(@arch_syscall_prefix "sys_msync") ? { __set_syscall_pt_regs(pointer_arg(1)) @_SYSCALL_MSYNC_NAME @_SYSCALL_MSYNC_REGARGS @_SYSCALL_MSYNC_ARGSTR } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.msync = kernel.trace("sys_enter") { __set_syscall_pt_regs($regs) @__syscall_compat_gate(@const("__NR_msync"), @const("__NR_compat_msync")) @_SYSCALL_MSYNC_NAME @_SYSCALL_MSYNC_REGARGS @_SYSCALL_MSYNC_ARGSTR } probe nd_syscall.msync.return = nd1_syscall.msync.return!, nd2_syscall.msync.return!, tp_syscall.msync.return { } probe nd1_syscall.msync.return = kprobe.function("sys_msync").return ? { @_SYSCALL_MSYNC_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 4.17+ */ probe nd2_syscall.msync.return = kprobe.function(@arch_syscall_prefix "sys_msync").return ? { @_SYSCALL_MSYNC_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.msync.return = kernel.trace("sys_exit") { __set_syscall_pt_regs($regs) @__syscall_compat_gate(@const("__NR_msync"), @const("__NR_compat_msync")) @_SYSCALL_MSYNC_NAME @SYSC_RETVALSTR($ret) }