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[hppa/commit] Start of 64-bit hppa-linux support

This is a slightly updated and cleaned up version of my patch from last December; as I have not gotten any comments I am going to commit this now.

Original post:
http://sources.redhat.com/ml/gdb-patches/2005-12/msg00260.html

randolph 
2005-03-30  Randolph Chung  <tausq@debian.org>

	* hppa-linux-tdep.c: Include regset.h.
	(GR_REGNUM, TR_REGNUM, greg_map): New.
	(hppa_linux_supply_regset, hppa_linux_supply_fpregset): New.
	(hppa_linux_regset, hppa_linux_fpregset): New.
	(hppa_linux_regset_from_core_section): New.
	(hppa_linux_init_abi): Set regset_from_core_section.
	(_initialize_hppa_linux_tdep): Register osabi handler for
	64-bit Linux.
	* Makefile.in (hppa-linux-tdep.o): Update dependencies.
	* config/pa/linux.mh: Stop using core-regset.o

Index: hppa-linux-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/hppa-linux-tdep.c,v
retrieving revision 1.18
diff -u -p -r1.18 hppa-linux-tdep.c
--- hppa-linux-tdep.c	21 Jan 2006 00:04:20 -0000	1.18
+++ hppa-linux-tdep.c	30 Mar 2006 14:18:26 -0000
@@ -30,6 +30,7 @@
 #include "trad-frame.h"
 #include "dwarf2-frame.h"
 #include "value.h"
+#include "regset.h"
 #include "hppa-tdep.h"
 
 #include "elf/common.h"
@@ -400,6 +401,112 @@ hppa_linux_find_global_pointer (struct v
     }
   return 0;
 }
+
+/*
+ * Registers saved in a coredump:
+ * gr0..gr31
+ * sr0..sr7
+ * iaoq0..iaoq1
+ * iasq0..iasq1
+ * sar, iir, isr, ior, ipsw
+ * cr0, cr24..cr31
+ * cr8,9,12,13
+ * cr10, cr15
+ */
+
+#define GR_REGNUM(_n)	(HPPA_R0_REGNUM+_n)
+#define TR_REGNUM(_n)	(HPPA_TR0_REGNUM+_n)
+static const int greg_map[] =
+  {
+    GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
+    GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
+    GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
+    GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
+    GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
+    GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
+    GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
+    GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
+
+    HPPA_SR4_REGNUM+1, HPPA_SR4_REGNUM+2, HPPA_SR4_REGNUM+3, HPPA_SR4_REGNUM+4,
+    HPPA_SR4_REGNUM, HPPA_SR4_REGNUM+5, HPPA_SR4_REGNUM+6, HPPA_SR4_REGNUM+7,
+
+    HPPA_PCOQ_HEAD_REGNUM, HPPA_PCOQ_TAIL_REGNUM,
+    HPPA_PCSQ_HEAD_REGNUM, HPPA_PCSQ_TAIL_REGNUM,
+
+    HPPA_SAR_REGNUM, HPPA_IIR_REGNUM, HPPA_ISR_REGNUM, HPPA_IOR_REGNUM,
+    HPPA_IPSW_REGNUM, HPPA_RCR_REGNUM,
+
+    TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
+    TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
+
+    HPPA_PID0_REGNUM, HPPA_PID1_REGNUM, HPPA_PID2_REGNUM, HPPA_PID3_REGNUM,
+    HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM,
+  };
+
+static void
+hppa_linux_supply_regset (const struct regset *regset,
+			  struct regcache *regcache,
+			  int regnum, const void *regs, size_t len)
+{
+  struct gdbarch *arch = get_regcache_arch (regcache);
+  struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
+  const char *buf = regs;
+  int i, offset;
+
+  offset = 0;
+  for (i = 0; i < ARRAY_SIZE (greg_map); i++)
+    {
+      if (regnum == greg_map[i] || regnum == -1)
+        regcache_raw_supply (regcache, greg_map[i], buf + offset);
+
+      offset += tdep->bytes_per_address;
+    }
+}
+
+static void
+hppa_linux_supply_fpregset (const struct regset *regset,
+			    struct regcache *regcache,
+			    int regnum, const void *regs, size_t len)
+{
+  const char *buf = regs;
+  int i, offset;
+
+  offset = 0;
+  for (i = 0; i < 31; i++)
+    {
+      if (regnum == HPPA_FP0_REGNUM + i || regnum == -1)
+        regcache_raw_supply (regcache, HPPA_FP0_REGNUM + i, 
+			     buf + offset);
+      offset += 8;
+    }
+}
+
+/* Linux register set.  */
+static struct regset hppa_linux_regset =
+{
+  NULL,
+  hppa_linux_supply_regset
+};
+
+static struct regset hppa_linux_fpregset =
+{
+  NULL,
+  hppa_linux_supply_fpregset
+};
+
+static const struct regset *
+hppa_linux_regset_from_core_section (struct gdbarch *gdbarch,
+				     const char *sect_name,
+				     size_t sect_size)
+{
+  if (strcmp (sect_name, ".reg") == 0)
+    return &hppa_linux_regset;
+  else if (strcmp (sect_name, ".reg2") == 0)
+    return &hppa_linux_fpregset;
+
+  return NULL;
+}
+
 
 /* Forward declarations.  */
 extern initialize_file_ftype _initialize_hppa_linux_tdep;
@@ -433,6 +540,9 @@ hppa_linux_init_abi (struct gdbarch_info
      more work in gcc and glibc first.  */
   set_gdbarch_long_double_bit (gdbarch, 64);
 
+  set_gdbarch_regset_from_core_section
+    (gdbarch, hppa_linux_regset_from_core_section);
+
 #if 0
   /* Dwarf-2 unwinding support.  Not yet working.  */
   set_gdbarch_dwarf_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
@@ -450,4 +560,5 @@ void
 _initialize_hppa_linux_tdep (void)
 {
   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_LINUX, hppa_linux_init_abi);
+  gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w, GDB_OSABI_LINUX, hppa_linux_init_abi);
 }
Index: config/pa/linux.mh
===================================================================
RCS file: /cvs/src/src/gdb/config/pa/linux.mh,v
retrieving revision 1.7
diff -u -p -r1.7 linux.mh
--- config/pa/linux.mh	4 Jan 2006 19:33:12 -0000	1.7
+++ config/pa/linux.mh	30 Mar 2006 14:18:26 -0000
@@ -2,7 +2,7 @@
 XDEPFILES=
 NAT_FILE= nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o corelow.o gcore.o \
-	core-regset.o hppa-linux-nat.o \
-	proc-service.o linux-thread-db.o linux-nat.o linux-fork.o
+	hppa-linux-nat.o proc-service.o linux-thread-db.o linux-nat.o \
+	linux-fork.o
 
 LOADLIBES = -ldl -rdynamic
Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.798
diff -u -p -r1.798 Makefile.in
--- Makefile.in	29 Mar 2006 22:58:53 -0000	1.798
+++ Makefile.in	30 Mar 2006 14:19:04 -0000
@@ -2033,7 +2033,7 @@ hppa-linux-nat.o: hppa-linux-nat.c $(def
 hppa-linux-tdep.o: hppa-linux-tdep.c $(defs_h) $(gdbcore_h) $(osabi_h) \
 	$(target_h) $(objfiles_h) $(solib_svr4_h) $(glibc_tdep_h) \
 	$(frame_unwind_h) $(trad_frame_h) $(dwarf2_frame_h) $(value_h) \
-	$(hppa_tdep_h) $(elf_common_h)
+	$(hppa_tdep_h) $(elf_common_h) $(regset_h)
 hppa-tdep.o: hppa-tdep.c $(defs_h) $(bfd_h) $(inferior_h) $(regcache_h) \
 	$(completer_h) $(osabi_h) $(gdb_assert_h) $(arch_utils_h) \
 	$(symtab_h) $(dis_asm_h) $(trad_frame_h) $(frame_unwind_h) \
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