gdb/

	* regcache.h (regcache_raw_read, regcache_raw_read_signed)
	(regcache_raw_read_unsigned, regcache_raw_read_signed)
	(regcache_raw_read_unsigned, regcache_raw_read_part)
	(regcache_cooked_read, regcache_cooked_read_signed)
	(regcache_cooked_read_unsigned, regcache_cooked_read_part)
	(regcache_cooked_read_ftype): Change return to enum
	register_status.
	* regcache.c: Include exceptions.h
	(regcache_save): Adjust to handle REG_UNAVAILABLE registers.
	(do_cooked_read): Change return to enum register_status.  Always
	forward to regcache_cooked_read.
	(regcache_raw_read): Change return to enum register_status.  If
	the register is not REG_VALID, memset the buffer.  Return the
	register's status.
	(regcache_raw_read_signed): Handle non-REG_VALID registers and
	return the register's status.
	(regcache_raw_read_unsigned): Ditto.
	(regcache_cooked_read): Change return to enum register_status.
	Assert that with read-only regcaches, the register's status must
	be known.  If the regcache is read-only, and the register is not
	REG_VALID, memset the buffer.  Return the register's status.
	(regcache_cooked_read_signed): Change return to enum
	register_status.  Handle non-REG_VALID registers and return the
	register's status.
	(regcache_cooked_read_unsigned): Change return to enum
	register_status.  Handle non-REG_VALID registers and return the
	register's status.
	(regcache_xfer_part, regcache_raw_read_part)
	(regcache_cooked_read_part): Change return to enum
	register_status.  Return the register's status.
	(regcache_read_pc): Throw NOT_AVAILABLE_ERROR if the register is
	unavailable.
	(regcache_dump): Handle unavailable cooked registers.
	* frame.c (do_frame_register_read): Adjust interface to match
	regcache_cooked_read_ftype.
	* gdbarch.sh (pseudo_register_read): Change return to enum
	register_status.
	* gdbarch.h, gdbarch.c: Regenerate.

	* i386-tdep.h (i386_pseudo_register_read): Change return to enum
	register_status.
	* i386-tdep.c (i386_pseudo_register_read): Change return to enum
	register_status.  If reading a raw register indicates the raw
	register is not valid, return the raw register's status,
	otherwise, return REG_VALID.
	* amd64-tdep.c (amd64_pseudo_register_read): Change return to enum
	register_status.  Handle non-REG_VALID raw registers and return
	the register's status.
	* arm-tdep.c (arm_neon_quad_read)
	(arm_pseudo_read): Change return to enum register_status.  Handle
	non-REG_VALID raw registers and return the register's status.
	* avr-tdep.c (avr_pseudo_register_read): Ditto.
	* frv-tdep.c (frv_pseudo_register_read): Ditto.
	* h8300-tdep.c (h8300_pseudo_register_read): Ditto.
	* hppa-tdep.c (hppa_pseudo_register_read): Ditto.
	* m32c-tdep.c (m32c_move_reg_t): Change return to enum
	register_status.
	(m32c_raw_read, m32c_raw_write, m32c_banked_read)
	(m32c_banked_write, m32c_sb_read, m32c_sb_write, m32c_part_read)
	(m32c_part_write, m32c_cat_read, m32c_cat_write)
	(m32c_r3r2r1r0_read, m32c_r3r2r1r0_write)
	(m32c_pseudo_register_read): Change return to enum
	register_status.  Adjust.
	* m68hc11-tdep.c (m68hc11_pseudo_register_read): Change return to
	enum register_status.  Return the register's status.
	* mep-tdep.c (mep_pseudo_cr32_read): Change return to enum
	register_status.  Return the register's status.
	(mep_pseudo_cr64_read, mep_pseudo_register_read): Ditto.
	* mips-tdep.c (mips_pseudo_register_read): Ditto.
	* mt-tdep.c (mt_pseudo_register_read): Ditto.
	* rs6000-tdep.c (move_ev_register_func): New typedef.
	(e500_move_ev_register): Use it.  Change return to enum
	register_status.  Return the register's status.
	(do_regcache_raw_read): New function.
	(do_regcache_raw_write): New function.
	(e500_pseudo_register_read): Change return to enum
	register_status.  Return the register's status.  Use
	do_regcache_raw_read.
	(e500_pseudo_register_write): Adjust.  Use do_regcache_raw_write.
	(dfp_pseudo_register_read): Change return to enum register_status.
	Return the register's status.
	(vsx_pseudo_register_read): Ditto.
	(efpr_pseudo_register_read): Ditto.
	(rs6000_pseudo_register_read): Ditto.
	* s390-tdep.c (s390_pseudo_register_read): Change return to enum
	register_status.  Return the register's status.
	* sh64-tdep.c (pseudo_register_read_portions): New function.
	(sh64_pseudo_register_read): Change return to enum
	register_status.  Use pseudo_register_read_portions.  Return the
	register's status.
	* ia64-tdep.c (ia64_pseudo_register_read): Change return to enum
	register_status.  Return the register's status.
	* sh-tdep.c (pseudo_register_read_portions): New function.
	(sh_pseudo_register_read): Change return to enum register_status.
	Use pseudo_register_read_portions.  Return the register's status.
	* sparc-tdep.c (sparc32_pseudo_register_read): Change return to
	enum register_status.  Return the register's status.
	* sparc64-tdep.c (sparc64_pseudo_register_read): Ditto.
	* spu-tdep.c (spu_pseudo_register_read_spu)
	(spu_pseudo_register_read): Ditto.
	* xtensa-tdep.c (xtensa_register_read_masked)
	(xtensa_pseudo_register_read): Ditto.
	* bfin-tdep.c (bfin_pseudo_register_read): Ditto.

1 files changed, 23 insertions, 10 deletions

diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index eab8e44..6330ceb 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -2541,18 +2541,21 @@ i386_mmx_regnum_to_fp_regnum (struct regcache *regcache, int regnum)
   return (I387_ST0_REGNUM (tdep) + fpreg);
 }
 
-void
+enum register_status
 i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
 			   int regnum, gdb_byte *buf)
 {
   gdb_byte raw_buf[MAX_REGISTER_SIZE];
+  enum register_status status;
 
   if (i386_mmx_regnum_p (gdbarch, regnum))
     {
       int fpnum = i386_mmx_regnum_to_fp_regnum (regcache, regnum);
 
       /* Extract (always little endian).  */
-      regcache_raw_read (regcache, fpnum, raw_buf);
+      status = regcache_raw_read (regcache, fpnum, raw_buf);
+      if (status != REG_VALID)
+	return status;
       memcpy (buf, raw_buf, register_size (gdbarch, regnum));
     }
   else
@@ -2564,14 +2567,18 @@ i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
 	  regnum -= tdep->ymm0_regnum;
 
 	  /* Extract (always little endian).  Read lower 128bits.  */
-	  regcache_raw_read (regcache,
-			     I387_XMM0_REGNUM (tdep) + regnum,
-			     raw_buf);
+	  status = regcache_raw_read (regcache,
+				      I387_XMM0_REGNUM (tdep) + regnum,
+				      raw_buf);
+	  if (status != REG_VALID)
+	    return status;
 	  memcpy (buf, raw_buf, 16);
 	  /* Read upper 128bits.  */
-	  regcache_raw_read (regcache,
-			     tdep->ymm0h_regnum + regnum,
-			     raw_buf);
+	  status = regcache_raw_read (regcache,
+				      tdep->ymm0h_regnum + regnum,
+				      raw_buf);
+	  if (status != REG_VALID)
+	    return status;
 	  memcpy (buf + 16, raw_buf, 16);
 	}
       else if (i386_word_regnum_p (gdbarch, regnum))
@@ -2579,7 +2586,9 @@ i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
 	  int gpnum = regnum - tdep->ax_regnum;
 
 	  /* Extract (always little endian).  */
-	  regcache_raw_read (regcache, gpnum, raw_buf);
+	  status = regcache_raw_read (regcache, gpnum, raw_buf);
+	  if (status != REG_VALID)
+	    return status;
 	  memcpy (buf, raw_buf, 2);
 	}
       else if (i386_byte_regnum_p (gdbarch, regnum))
@@ -2591,7 +2600,9 @@ i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
 
 	  /* Extract (always little endian).  We read both lower and
 	     upper registers.  */
-	  regcache_raw_read (regcache, gpnum % 4, raw_buf);
+	  status = regcache_raw_read (regcache, gpnum % 4, raw_buf);
+	  if (status != REG_VALID)
+	    return status;
 	  if (gpnum >= 4)
 	    memcpy (buf, raw_buf + 1, 1);
 	  else
@@ -2600,6 +2611,8 @@ i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
       else
 	internal_error (__FILE__, __LINE__, _("invalid regnum"));
     }
+
+  return REG_VALID;
 }
 
 void