* hppabsd-tdep.c: Include "symtab.h", "objfiles.h", "target.h",

"value.h" and "elf/common.h".
(hppabsd_supply_gregset): Use `gdb_byte *' for byte buffer.
(hppabsd_find_global_pointer): New function.
(hppabsd_init_abi): Set TDEP->find_global_pointer to
hppabsd_find_global_pointer.
* Makefile.in (hppabsd-tdep.o): Update dependencies.

gdb/ChangeLog

@@ -1,3 +1,13 @@
+2005-06-20  Mark Kettenis  <kettenis@gnu.org>
+
+	* hppabsd-tdep.c: Include "symtab.h", "objfiles.h", "target.h",
+	"value.h" and "elf/common.h".
+	(hppabsd_supply_gregset): Use `gdb_byte *' for byte buffer.
+	(hppabsd_find_global_pointer): New function.
+	(hppabsd_init_abi): Set TDEP->find_global_pointer to
+	hppabsd_find_global_pointer.
+	* Makefile.in (hppabsd-tdep.o): Update dependencies.
+
 2005-06-12  Mark Kettenis  <kettenis@gnu.org>
 
 	* hppa-tdep.c (hppa_pointer_to_address_hack): Remove function.

gdb/Makefile.in

@@ -2003,8 +2003,9 @@ hpacc-abi.o: hpacc-abi.c $(defs_h) $(value_h) $(gdb_regex_h) $(gdb_string_h) \
 	$(gdbtypes_h) $(gdbcore_h) $(cp_abi_h) $(gnu_v2_abi_h)
 hppabsd-nat.o: hppabsd-nat.c $(defs_h) $(inferior_h) $(regcache_h) \
 	$(target_h) $(hppa_tdep_h) $(inf_ptrace_h)
-hppabsd-tdep.o: hppabsd-tdep.c $(defs_h) $(arch_utils_h) $(osabi_h) \
-	$(regcache_h) $(regset_h) $(gdb_assert_h) $(gdb_string_h) \
+hppabsd-tdep.o: hppabsd-tdep.c $(defs_h) $(arch_utils_h) $(symtab_h) \
+	$(objfiles_h) $(osabi_h) $(regcache_h) $(regset_h) $(target_h) \
+	$(value_h) $(gdb_assert_h) $(gdb_string_h) $(elf_common_h) \
 	$(hppa_tdep_h) $(solib_svr4_h)
 hppa-hpux-nat.o: hppa-hpux-nat.c $(defs_h) $(inferior_h) $(regcache_h) \
 	$(target_h) $(gdb_assert_h) $(hppa_tdep_h) $(inf_ptrace_h) \

gdb/hppabsd-tdep.c

@@ -1,6 +1,6 @@
 /* Target-dependent code for HP PA-RISC BSD's.
 
-   Copyright 2004 Free Software Foundation, Inc.
+   Copyright 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -21,13 +21,19 @@
 
 #include "defs.h"
 #include "arch-utils.h"
+#include "symtab.h"
+#include "objfiles.h"
 #include "osabi.h"
 #include "regcache.h"
 #include "regset.h"
+#include "target.h"
+#include "value.h"
 
 #include "gdb_assert.h"
 #include "gdb_string.h"
 
+#include "elf/common.h"
+
 #include "hppa-tdep.h"
 #include "solib-svr4.h"
 
@@ -44,7 +50,7 @@ static void
 hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
 		     int regnum, const void *gregs, size_t len)
 {
-  const char *regs = gregs;
+  const gdb_byte *regs = gregs;
   size_t offset;
   int i;
 
@@ -86,6 +92,78 @@ hppabsd_regset_from_core_section (struct gdbarch *gdbarch,
 }
 
 
+CORE_ADDR
+hppabsd_find_global_pointer (struct value *function)
+{
+  CORE_ADDR faddr = value_as_address (function);
+  struct obj_section *faddr_sec;
+  gdb_byte buf[4];
+
+  /* Is this a plabel? If so, dereference it to get the Global Pointer
+     value.  */
+  if (faddr & 2)
+    {
+      if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
+	return extract_unsigned_integer (buf, sizeof buf);
+    }
+
+  /* If the address is in the .plt section, then the real function
+     hasn't yet been fixed up by the linker so we cannot determine the
+     Global Pointer for that function.  */
+  if (in_plt_section (faddr, NULL))
+    return 0;
+
+  faddr_sec = find_pc_section (faddr);
+  if (faddr_sec != NULL)
+    {
+      struct obj_section *sec;
+
+      ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec)
+	{
+	  if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
+	    break;
+	}
+
+      if (sec < faddr_sec->objfile->sections_end)
+	{
+	  CORE_ADDR addr = sec->addr;
+
+	  while (addr < sec->endaddr)
+	    {
+	      gdb_byte buf[4];
+	      LONGEST tag;
+
+	      if (target_read_memory (addr, buf, sizeof buf) != 0)
+		break;
+
+	      tag = extract_signed_integer (buf, sizeof buf);
+	      if (tag == DT_PLTGOT)
+		{
+		  CORE_ADDR pltgot;
+
+		  if (target_read_memory (addr + 4, buf, sizeof buf) != 0)
+		    break;
+
+		  /* The OpenBSD ld.so doesn't relocate DT_PLTGOT, so
+		     we have to do it ourselves.  */
+		  pltgot = extract_unsigned_integer (buf, sizeof buf);
+		  pltgot += ANOFFSET (sec->objfile->section_offsets,
+				      SECT_OFF_TEXT (sec->objfile));
+		  return pltgot;
+		}
+
+	      if (tag == DT_NULL)
+		break;
+
+	      addr += 8;
+	    }
+	}
+    }
+
+  return 0;
+}
+
+
 static void
 hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
@@ -96,6 +174,7 @@ hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
     (gdbarch, hppabsd_regset_from_core_section);
 
   /* OpenBSD and NetBSD use ELF.  */
+  tdep->find_global_pointer = hppabsd_find_global_pointer;
   tdep->is_elf = 1;
 
   /* OpenBSD and NetBSD uses SVR4-style shared libraries.  */