diff --git a/libc/kernel/arch-x86/asm/sigcontext.h b/libc/kernel/arch-x86/asm/sigcontext.h
index 390189f..b0b5fd4 100644
--- a/libc/kernel/arch-x86/asm/sigcontext.h
+++ b/libc/kernel/arch-x86/asm/sigcontext.h
@@ -21,73 +21,130 @@
 #include <linux/compiler.h>
 #include <asm/types.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#ifdef __i386__
 struct _fpreg {
  unsigned short significand[4];
  unsigned short exponent;
-};
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
 struct _fpxreg {
  unsigned short significand[4];
  unsigned short exponent;
- unsigned short padding[3];
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned short padding[3];
 };
 struct _xmmreg {
  unsigned long element[4];
-};
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
 struct _fpstate {
  unsigned long cw;
  unsigned long sw;
- unsigned long tag;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long tag;
  unsigned long ipoff;
  unsigned long cssel;
  unsigned long dataoff;
- unsigned long datasel;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long datasel;
  struct _fpreg _st[8];
  unsigned short status;
  unsigned short magic;
- unsigned long _fxsr_env[6];
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long _fxsr_env[6];
  unsigned long mxcsr;
  unsigned long reserved;
  struct _fpxreg _fxsr_st[8];
- struct _xmmreg _xmm[8];
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct _xmmreg _xmm[8];
  unsigned long padding[56];
 };
 #define X86_FXSR_MAGIC 0x0000
-struct sigcontext {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct sigcontext {
  unsigned short gs, __gsh;
  unsigned short fs, __fsh;
  unsigned short es, __esh;
- unsigned short ds, __dsh;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned short ds, __dsh;
  unsigned long edi;
  unsigned long esi;
  unsigned long ebp;
- unsigned long esp;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long esp;
  unsigned long ebx;
  unsigned long edx;
  unsigned long ecx;
- unsigned long eax;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long eax;
  unsigned long trapno;
  unsigned long err;
  unsigned long eip;
- unsigned short cs, __csh;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned short cs, __csh;
  unsigned long eflags;
  unsigned long esp_at_signal;
  unsigned short ss, __ssh;
- struct _fpstate __user * fpstate;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ struct _fpstate __user * fpstate;
  unsigned long oldmask;
  unsigned long cr2;
 };
-#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#else
+struct _fpstate {
+ __u16 cwd;
+ __u16 swd;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u16 twd;
+ __u16 fop;
+ __u64 rip;
+ __u64 rdp;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 mxcsr;
+ __u32 mxcsr_mask;
+ __u32 st_space[32];
+ __u32 xmm_space[64];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 reserved2[24];
+};
+struct sigcontext {
+ unsigned long r8;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long r9;
+ unsigned long r10;
+ unsigned long r11;
+ unsigned long r12;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long r13;
+ unsigned long r14;
+ unsigned long r15;
+ unsigned long rdi;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long rsi;
+ unsigned long rbp;
+ unsigned long rbx;
+ unsigned long rdx;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long rax;
+ unsigned long rcx;
+ unsigned long rsp;
+ unsigned long rip;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long eflags;
+ unsigned short cs;
+ unsigned short gs;
+ unsigned short fs;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned short __pad0;
+ unsigned long err;
+ unsigned long trapno;
+ unsigned long oldmask;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned long cr2;
+ struct _fpstate __user *fpstate;
+ unsigned long reserved1[8];
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif
+#endif