# fallocate __________________________________________________ # # COMPAT_SYSCALL_DEFINE6(x86_fallocate, int, fd, int, mode, # unsigned int, offset_lo, unsigned int, offset_hi, # unsigned int, len_lo, unsigned int, len_hi) # asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo, # unsigned offset_hi, unsigned len_lo, # unsigned len_hi) @define _SYSCALL_COMPAT_FALLOCATE_NAME %( name = "fallocate" %) @define _SYSCALL_COMPAT_FALLOCATE_ARGSTR %( argstr = sprintf("%d, %s, %#x, %u", fd, mode_str, offset, len) %) @define _SYSCALL_COMPAT_FALLOCATE_REGARGS %( fd = int_arg(1) mode = int_arg(2) mode_str = _stp_fallocate_mode_str(mode) offset = ((uint_arg(4) << 32) | uint_arg(3)) len = ((uint_arg(6) << 32) | uint_arg(5)) %) probe syscall.compat_fallocate = dw_syscall.compat_fallocate !, nd_syscall.compat_fallocate ? {} probe syscall.compat_fallocate.return = dw_syscall.compat_fallocate.return !, nd_syscall.compat_fallocate.return ? {} # dw_compat_fallocate _____________________________________________________ probe dw_syscall.compat_fallocate = kernel.function("sys32_fallocate").call ?, kernel.function("comapt_sys_x86_fallocate").call ? { @_SYSCALL_COMPAT_FALLOCATE_NAME fd = __int32($fd) mode = __int32($mode) mode_str = _stp_fallocate_mode_str(mode) offset = (($offset_hi << 32) | $offset_lo) len = (($len_hi << 32) | $len_lo) @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } probe dw_syscall.compat_fallocate.return = kernel.function("sys32_fallocate").return ?, kernel.function("compat_sys_x86_fallocate").return ? { @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR($return) } # nd_compat_fallocate _____________________________________________________ probe nd_syscall.compat_fallocate = nd1_syscall.compat_fallocate!, nd2_syscall.compat_fallocate!, tp_syscall.compat_fallocate { } probe nd1_syscall.compat_fallocate = kprobe.function("sys32_fallocate") ?, kprobe.function("compat_sys_x86_fallocate") ? { asmlinkage() @_SYSCALL_COMPAT_FALLOCATE_NAME @_SYSCALL_COMPAT_FALLOCATE_REGARGS @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } /* kernel 4.17+ */ probe nd2_syscall.compat_fallocate = kprobe.function(@arch_syscall_prefix "compat_sys_x86_fallocate") ? { __set_syscall_pt_regs(pointer_arg(1)) @_SYSCALL_COMPAT_FALLOCATE_NAME @_SYSCALL_COMPAT_FALLOCATE_REGARGS @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.compat_fallocate = kernel.trace("sys_enter") { __set_syscall_pt_regs($regs) @__compat_syscall_gate(@const("__NR_ia32_fallocate")) @_SYSCALL_COMPAT_FALLOCATE_NAME @_SYSCALL_COMPAT_FALLOCATE_REGARGS @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } probe nd_syscall.compat_fallocate.return = nd1_syscall.compat_fallocate.return!, nd2_syscall.compat_fallocate.return!, tp_syscall.compat_fallocate.return { } probe nd1_syscall.compat_fallocate.return = kprobe.function("sys32_fallocate").return ?, kprobe.function("compat_sys_x86_fallocate").return ? { @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 4.17+ */ probe nd2_syscall.compat_fallocate.return = kprobe.function(@arch_syscall_prefix "compat_sys_x86_fallocate").return ? { @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.compat_fallocate.return = kernel.trace("sys_exit") { __set_syscall_pt_regs($regs) @__compat_syscall_gate(@const("__NR_ia32_fallocate")) @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR($ret) }