# set_thread_area ____________________________________________ /* * asmlinkage int * sys_set_thread_area(struct user_desc __user *u_info) * asmlinkage long sys32_set_thread_area(struct user_desc __user *u_info) */ @define _SYSCALL_SET_THREAD_AREA_NAME %( name = "set_thread_area" %) @define _SYSCALL_SET_THREAD_AREA_ARGSTR %( argstr = sprintf("%s", u_info_str) %) @define _SYSCALL_SET_THREAD_AREA_REGARGS %( u_info_uaddr = pointer_arg(1) u_info_str = _struct_user_desc_u(u_info_uaddr) %) probe syscall.set_thread_area = dw_syscall.set_thread_area !, nd_syscall.set_thread_area ? {} probe syscall.set_thread_area.return = dw_syscall.set_thread_area.return !, nd_syscall.set_thread_area.return ? {} # dw_set_thread_area _____________________________________________________ probe dw_syscall.set_thread_area = kernel.function("sys_set_thread_area") ?, kernel.function("sys32_set_thread_area") ? { @_SYSCALL_SET_THREAD_AREA_NAME u_info_uaddr = $u_info u_info_str = _struct_user_desc_u(u_info_uaddr) @_SYSCALL_SET_THREAD_AREA_ARGSTR } probe dw_syscall.set_thread_area.return = kernel.function("sys_set_thread_area").return ?, kernel.function("sys32_set_thread_area").return ? { @_SYSCALL_SET_THREAD_AREA_NAME @SYSC_RETVALSTR($return) } # nd_set_thread_area _____________________________________________________ probe nd_syscall.set_thread_area = nd1_syscall.set_thread_area!, nd2_syscall.set_thread_area!, tp_syscall.set_thread_area { } probe nd1_syscall.set_thread_area = kprobe.function("sys_set_thread_area") ?, kprobe.function("sys32_set_thread_area") ? { @_SYSCALL_SET_THREAD_AREA_NAME asmlinkage() @_SYSCALL_SET_THREAD_AREA_REGARGS @_SYSCALL_SET_THREAD_AREA_ARGSTR } /* kernel 4.17+ */ probe nd2_syscall.set_thread_area = kprobe.function(@arch_syscall_prefix "sys_set_thread_area") ? { __set_syscall_pt_regs(pointer_arg(1)) @_SYSCALL_SET_THREAD_AREA_NAME @_SYSCALL_SET_THREAD_AREA_REGARGS @_SYSCALL_SET_THREAD_AREA_ARGSTR } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.set_thread_area = kernel.trace("sys_enter") { __set_syscall_pt_regs($regs) @__syscall_compat_gate(@const("__NR_set_thread_area"), @const("__NR_ia32_set_thread_area")) @_SYSCALL_SET_THREAD_AREA_NAME @_SYSCALL_SET_THREAD_AREA_REGARGS @_SYSCALL_SET_THREAD_AREA_ARGSTR } probe nd_syscall.set_thread_area.return = nd1_syscall.set_thread_area.return!, nd2_syscall.set_thread_area.return!, tp_syscall.set_thread_area.return { } probe nd1_syscall.set_thread_area.return = kprobe.function("sys_set_thread_area").return ?, kprobe.function("sys32_set_thread_area").return ? { @_SYSCALL_SET_THREAD_AREA_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 4.17+ */ probe nd2_syscall.set_thread_area.return = kprobe.function(@arch_syscall_prefix "sys_set_thread_area").return ? { @_SYSCALL_SET_THREAD_AREA_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.set_thread_area.return = kernel.trace("sys_exit") { __set_syscall_pt_regs($regs) @__syscall_compat_gate(@const("__NR_set_thread_area"), @const("__NR_ia32_set_thread_area")) @_SYSCALL_SET_THREAD_AREA_NAME @SYSC_RETVALSTR($ret) }