+/* Types for i386-specific registers. */
+extern struct type *i387_ext_type (struct gdbarch *gdbarch);
+
+/* Checks of different pseudo-registers. */
+extern int i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_word_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_bnd_regnum_p (struct gdbarch *gdbarch, int regnum);
+
+extern const char *i386_pseudo_register_name (struct gdbarch *gdbarch,
+ int regnum);
+extern struct type *i386_pseudo_register_type (struct gdbarch *gdbarch,
+ int regnum);
+
+extern void i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
+ struct regcache *regcache,
+ int regnum,
+ struct value *result);
+
+extern void i386_pseudo_register_write (struct gdbarch *gdbarch,
+ struct regcache *regcache,
+ int regnum, const gdb_byte *buf);
+
+/* Segment selectors. */
+#define I386_SEL_RPL 0x0003 /* Requester's Privilege Level mask. */
+#define I386_SEL_UPL 0x0003 /* User Privilige Level. */
+#define I386_SEL_KPL 0x0000 /* Kernel Privilige Level. */
+
+/* The length of the longest i386 instruction (according to
+ include/asm-i386/kprobes.h in Linux 2.6. */
+#define I386_MAX_INSN_LEN (16)
+
+/* Functions exported from i386-tdep.c. */
+extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame,
+ CORE_ADDR pc, char *name);
+extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch,
+ CORE_ADDR pc);
+
+/* Return whether the THIS_FRAME corresponds to a sigtramp routine. */
+extern int i386_sigtramp_p (struct frame_info *this_frame);
+
+/* Return non-zero if REGNUM is a member of the specified group. */
+extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
+ struct reggroup *group);
+
+/* Supply register REGNUM from the general-purpose register set REGSET
+ to register cache REGCACHE. If REGNUM is -1, do this for all
+ registers in REGSET. */
+extern void i386_supply_gregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *gregs, size_t len);
+
+/* Collect register REGNUM from the register cache REGCACHE and store
+ it in the buffer specified by GREGS and LEN as described by the
+ general-purpose register set REGSET. If REGNUM is -1, do this for
+ all registers in REGSET. */
+extern void i386_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len);
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+extern const struct regset *
+ i386_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size);
+
+
+extern struct displaced_step_closure *i386_displaced_step_copy_insn
+ (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to,
+ struct regcache *regs);
+extern void i386_displaced_step_fixup (struct gdbarch *gdbarch,
+ struct displaced_step_closure *closure,
+ CORE_ADDR from, CORE_ADDR to,
+ struct regcache *regs);