* hppa-linux-tdep.c (hppa_dwarf_reg_to_regnum): Remove surrounding

	"#if 0" "#endif".  Fix mapping of DWARF DBX registers to GDB registers.
	Correct arguments and improve comments.
	(hppa_linux_init_abi): Call set_gdbarch_dwarf2_reg_to_regnum.  Delete
	disabled code.
	* hppa-tdep.c (hppa64_dwarf_reg_to_regnum): Fix check for floating
	point DBX register, change error to warning, and improve comments.

3 files changed, 22 insertions, 19 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index edce9ae..00619d7 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2008-09-14  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	* hppa-linux-tdep.c (hppa_dwarf_reg_to_regnum): Remove surrounding
+	"#if 0" "#endif".  Fix mapping of DWARF DBX registers to GDB registers.
+	Correct arguments and improve comments.
+	(hppa_linux_init_abi): Call set_gdbarch_dwarf2_reg_to_regnum.  Delete
+	disabled code.
+	* hppa-tdep.c (hppa64_dwarf_reg_to_regnum): Fix check for floating
+	point DBX register, change error to warning, and improve comments.
+
 2008-09-14  Doug Evans  <dje@google.com>
 
 	* dwarf2read.c (struct die_info): Make members tag, num_attrs 16 bits.
diff --git a/gdb/hppa-linux-tdep.c b/gdb/hppa-linux-tdep.c
index 2cc591c..2c91441 100644
--- a/gdb/hppa-linux-tdep.c
+++ b/gdb/hppa-linux-tdep.c
@@ -34,24 +34,21 @@
 
 #include "elf/common.h"
 
-#if 0
-/* Convert DWARF register number REG to the appropriate register
-   number used by GDB.  */
+/* Map DWARF DBX register numbers to GDB register numbers.  */
 static int
-hppa_dwarf_reg_to_regnum (int reg)
+hppa_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
 {
-  /* registers 0 - 31 are the same in both sets */
-  if (reg < 32)
+  /* The general registers and the sar are the same in both sets.  */
+  if (reg <= 32)
     return reg;
 
-  /* dwarf regs 32 to 85 are fpregs 4 - 31 */
-  if (reg >= 32 && reg <= 85)
-    return HPPA_FP4_REGNUM + (reg - 32);
+  /* fr4-fr31 (left and right halves) are mapped from 72.  */
+  if (reg >= 72 && reg <= 72 + 28 * 2)
+    return HPPA_FP4_REGNUM + (reg - 72);
 
-  warning (_("Unmapped DWARF Register #%d encountered."), reg);
+  warning (_("Unmapped DWARF DBX Register #%d encountered."), reg);
   return -1;
 }
-#endif
 
 static void
 hppa_linux_target_write_pc (struct regcache *regcache, CORE_ADDR v)
@@ -545,12 +542,7 @@ hppa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_regset_from_core_section
     (gdbarch, hppa_linux_regset_from_core_section);
 
-#if 0
-  /* Dwarf-2 unwinding support.  Not yet working.  */
   set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
-  frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
-  frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
-#endif
 
   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/hppa-tdep.c b/gdb/hppa-tdep.c
index cd844e82..5b6676e 100644
--- a/gdb/hppa-tdep.c
+++ b/gdb/hppa-tdep.c
@@ -658,18 +658,19 @@ hppa64_register_name (struct gdbarch *gdbarch, int i)
     return names[i];
 }
 
+/* Map dwarf DBX register numbers to GDB register numbers.  */
 static int
 hppa64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
 {
-  /* r0-r31 and sar map one-to-one.  */
+  /* The general registers and the sar are the same in both sets.  */
   if (reg <= 32)
     return reg;
 
   /* fr4-fr31 are mapped from 72 in steps of 2.  */
-  if (reg >= 72 || reg < 72 + 28 * 2)
+  if (reg >= 72 && reg < 72 + 28 * 2 && !(reg & 1))
     return HPPA64_FP4_REGNUM + (reg - 72) / 2;
 
-  error ("Invalid DWARF register num %d.", reg);
+  warning (_("Unmapped DWARF DBX Register #%d encountered."), reg);
   return -1;
 }