Support x86 pseudo byte, word and dword registers.

gdb/

2010-03-02  H.J. Lu  <hongjiu.lu@intel.com>

	* amd64-tdep.c (amd64_byte_names): New.
	(amd64_word_names): Likewise.
	(amd64_dword_names): Likewise.
	(amd64_pseudo_register_name): Likewise.
	(amd64_pseudo_register_read): Likewise.
	(amd64_pseudo_register_write): Likewise.
	(amd64_init_abi): Set num_byte_regs, num_word_regs, num_dword_regs
	and num_mmx_regs.  Call set_gdbarch_pseudo_register_read,
	set_gdbarch_pseudo_register_write and
	set_tdesc_pseudo_register_name.  Don't call
	set_gdbarch_num_pseudo_regs.  Don't set mm0_regnum.

	* i386-tdep.c (i386_num_mmx_regs): Removed.
	(i386_num_pseudo_regs): Likewise.
	(i386_byte_names): New.
	(i386_word_names): Likewise.
	(i386_byte_regnum_p): Likewise.
	(i386_word_regnum_p): Likewise.
	(i386_mmx_regnum_p): Updated.
	(i386_pseudo_register_name): Make it global.  Handle byte and
	word pseudo-registers.
	(i386_pseudo_register_read): Likewise.
	(i386_pseudo_register_write): Likewise.
	(i386_pseudo_register_type): Handle byte, word and dword
	pseudo-registers
	(i386_register_reggroup_p): Don't include pseudo
	registers, except for MXX, in any register groups.  Don't
	include pseudo byte, word, dword registers in general_reggroup.
	(i386_gdbarch_init): Set num_byte_regs, num_word_regs,
	num_dword_regs, al_regnum, ax_regnum and eax_regnum.  Put MMX
	pseudo-registers after word pseudo-registers.  Call
	set_gdbarch_num_pseudo_regs after calling gdbarch_init_osabi.

	* i386-tdep.h (gdbarch_tdep): Add num_mmx_regs, num_byte_regs,
	al_regnum, num_word_regs, ax_regnum, num_dword_regs and
	eax_regnum.
	(i386_byte_regnum_p): New.
	(i386_word_regnum_p): Likewise.
	(i386_dword_regnum_p): Likewise.
	(i386_pseudo_register_name): Likewise.
	(i386_pseudo_register_read): Likewise.
	(i386_pseudo_register_write): Likewise.

gdb/testsuite/

2010-03-02  H.J. Lu  <hongjiu.lu@intel.com>

	* gdb.arch/amd64-byte.exp: New.
	* gdb.arch/amd64-dword.exp: Likewise.
	* gdb.arch/amd64-pseudo.c: Likewise.
	* gdb.arch/amd64-word.exp: Likewise.
	* gdb.arch/i386-byte.exp: Likewise.
	* gdb.arch/i386-pseudo.c: Likewise.
	* gdb.arch/i386-word.exp: Likewise.

1 files changed, 37 insertions, 0 deletions

diff --git a/gdb/i386-tdep.h b/gdb/i386-tdep.h
index a64e5c386a4..72c634e6b7d 100644
--- a/gdb/i386-tdep.h
+++ b/gdb/i386-tdep.h
@@ -114,10 +114,32 @@ struct gdbarch_tdep
      absence of an FPU.  */
   int st0_regnum;
 
+  /* Number of MMX registers.  */
+  int num_mmx_regs;
+
   /* Register number for %mm0.  Set this to -1 to indicate the absence
      of MMX support.  */
   int mm0_regnum;
 
+  /* Number of byte registers.  */
+  int num_byte_regs;
+
+  /* Register pseudo number for %al.  */
+  int al_regnum;
+
+  /* Number of pseudo word registers.  */
+  int num_word_regs;
+
+  /* Register number for %ax.  */
+  int ax_regnum;
+
+  /* Number of pseudo dword registers.  */
+  int num_dword_regs;
+
+  /* Register number for %eax.  Set this to -1 to indicate the absence
+     of pseudo dword register support.  */
+  int eax_regnum;
+
   /* Number of core registers.  */
   int num_core_regs;
 
@@ -250,6 +272,21 @@ enum record_i386_regnum
 /* 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 const char *i386_pseudo_register_name (struct gdbarch *gdbarch,
+					      int regnum);
+
+extern void i386_pseudo_register_read (struct gdbarch *gdbarch,
+				       struct regcache *regcache,
+				       int regnum, gdb_byte *buf);
+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. */