diff --git a/libc/kernel/arch-x86/asm/ptrace-abi.h b/libc/kernel/arch-x86/asm/ptrace-abi.h
index 3e6ea08..7cd9425 100644
--- a/libc/kernel/arch-x86/asm/ptrace-abi.h
+++ b/libc/kernel/arch-x86/asm/ptrace-abi.h
@@ -7,82 +7,92 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef _ASM_X86_PTRACE_ABI_H
 #define _ASM_X86_PTRACE_ABI_H
-
 #ifdef __i386__
-
 #define EBX 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ECX 1
 #define EDX 2
 #define ESI 3
 #define EDI 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EBP 5
 #define EAX 6
 #define DS 7
 #define ES 8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FS 9
 #define GS 10
 #define ORIG_EAX 11
 #define EIP 12
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CS 13
 #define EFL 14
 #define UESP 15
 #define SS 16
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FRAME_SIZE 17
-
 #else
-
 #if defined(__ASSEMBLY__) || defined(__FRAME_OFFSETS)
 #define R15 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R14 8
 #define R13 16
 #define R12 24
 #define RBP 32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define RBX 40
-
 #define R11 48
 #define R10 56
 #define R9 64
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R8 72
 #define RAX 80
 #define RCX 88
 #define RDX 96
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define RSI 104
 #define RDI 112
 #define ORIG_RAX 120  
-
 #define RIP 128
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CS 136
 #define EFLAGS 144
 #define RSP 152
 #define SS 160
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ARGOFFSET R11
 #endif
-
 #define FRAME_SIZE 168
-
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_GETREGS 12
 #define PTRACE_SETREGS 13
 #define PTRACE_GETFPREGS 14
 #define PTRACE_SETFPREGS 15
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_GETFPXREGS 18
 #define PTRACE_SETFPXREGS 19
-
 #define PTRACE_OLDSETOPTIONS 21
-
 #define PTRACE_GET_THREAD_AREA 25
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_SET_THREAD_AREA 26
-
 #ifdef __x86_64__
 #define PTRACE_ARCH_PRCTL 30
 #else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_SYSEMU 31
 #define PTRACE_SYSEMU_SINGLESTEP 32
 #endif
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */