text: #define __USER_CS	(0x33)
  #define __USER_DS	(0x2B)
  
  struct target_pt_regs {
  	abi_ulong r15;
  	abi_ulong r14;
  	abi_ulong r13;
  	abi_ulong r12;
  	abi_ulong rbp;
  	abi_ulong rbx;
  /* arguments: non interrupts/non tracing syscalls only save up to here */
   	abi_ulong r11;
  	abi_ulong r10;
  	abi_ulong r9;
  	abi_ulong r8;
  	abi_ulong rax;
  	abi_ulong rcx;
  	abi_ulong rdx;
  	abi_ulong rsi;
  	abi_ulong rdi;
  	abi_ulong orig_rax;
  /* end of arguments */
  /* cpu exception frame or undefined */
  	abi_ulong rip;
  	abi_ulong cs;
  	abi_ulong eflags;
  	abi_ulong rsp;
  	abi_ulong ss;
  /* top of stack page */
  };
  
  /* Maximum number of LDT entries supported. */
  #define TARGET_LDT_ENTRIES	8192
  /* The size of each LDT entry. */
  #define TARGET_LDT_ENTRY_SIZE	8
  
  #define TARGET_GDT_ENTRIES 16
  #define TARGET_GDT_ENTRY_TLS_ENTRIES 3
  #define TARGET_GDT_ENTRY_TLS_MIN 12
  #define TARGET_GDT_ENTRY_TLS_MAX 14
  
  #if 0 // Redefine this
  struct target_modify_ldt_ldt_s {
  	unsigned int  entry_number;
          abi_ulong     base_addr;
  	unsigned int  limit;
  	unsigned int  seg_32bit:1;
  	unsigned int  contents:2;
  	unsigned int  read_exec_only:1;
  	unsigned int  limit_in_pages:1;
  	unsigned int  seg_not_present:1;
  	unsigned int  useable:1;
  	unsigned int  lm:1;
  };
  #else
  struct target_modify_ldt_ldt_s {
  	unsigned int  entry_number;
          abi_ulong     base_addr;
  	unsigned int  limit;
          unsigned int flags;
  };
  #endif
  
  struct target_ipc64_perm
  {
  	int		key;
  	uint32_t	uid;
  	uint32_t	gid;
  	uint32_t	cuid;
  	uint32_t	cgid;
  	unsigned short		mode;
  	unsigned short		__pad1;
  	unsigned short		seq;
  	unsigned short		__pad2;
  	abi_ulong		__unused1;
  	abi_ulong		__unused2;
  };
  
  struct target_msqid64_ds {
  	struct target_ipc64_perm msg_perm;
  	unsigned int msg_stime;	/* last msgsnd time */
  	unsigned int msg_rtime;	/* last msgrcv time */
  	unsigned int msg_ctime;	/* last change time */
  	abi_ulong  msg_cbytes;	/* current number of bytes on queue */
  	abi_ulong  msg_qnum;	/* number of messages in queue */
  	abi_ulong  msg_qbytes;	/* max number of bytes on queue */
  	unsigned int msg_lspid;	/* pid of last msgsnd */
  	unsigned int msg_lrpid;	/* last receive pid */
  	abi_ulong  __unused4;
  	abi_ulong  __unused5;
  };
  
  /* FreeBSD sysarch(2) */
  #define TARGET_FREEBSD_I386_GET_LDT	0
  #define TARGET_FREEBSD_I386_SET_LDT	1
  				/* I386_IOPL */
  #define TARGET_FREEBSD_I386_GET_IOPERM	3
  #define TARGET_FREEBSD_I386_SET_IOPERM	4
  				/* xxxxx */
  #define TARGET_FREEBSD_I386_GET_FSBASE	7
  #define TARGET_FREEBSD_I386_SET_FSBASE	8
  #define TARGET_FREEBSD_I386_GET_GSBASE	9
  #define TARGET_FREEBSD_I386_SET_GSBASE	10
  
  #define TARGET_FREEBSD_AMD64_GET_FSBASE	128
  #define TARGET_FREEBSD_AMD64_SET_FSBASE	129
  #define TARGET_FREEBSD_AMD64_GET_GSBASE	130
  #define TARGET_FREEBSD_AMD64_SET_GSBASE	131
  
  
  #define UNAME_MACHINE "x86_64"
  
  #define TARGET_ARCH_SET_GS 0x1001
  #define TARGET_ARCH_SET_FS 0x1002
  #define TARGET_ARCH_GET_FS 0x1003
  #define TARGET_ARCH_GET_GS 0x1004
  