* infrun.c (wait_for_inferior): Add the symbols for any

	newly loaded objects upon a TARGET_WAITKIND_LOADED event.

	Rewrite code which determines the TOC address for calling functions
	in the inferior under AIX.
	* rs6000-nat.c (find_toc_address):  New function to determine
	the required TOC address from a function address.
	(_initialize_core_rs6000):  Set up find_toc_address_hook to point
	to find_toc_address.
	(xcoff_relocate_symtab, xcoff_relocate_core):  Remove
	add_text_to_loadinfo calls.
	(exec_one_dummy_insn):  Change pid and status to int to get rid of
	compiler warnings.
	(xcoff_relocate_symtab):  Cast ldi to `int *' when passing it to
	ptrace to get rid of compiler warnings.
	* rs6000-tdep.c:  Add definition for find_toc_address_hook.
	(rs6000_fix_call_dummy):  If find_toc_address_hook is non zero,
	patch TOC address load code in the call dummy with the value
	returned from find_toc_address_hook.
	(struct loadinfo, loadinfo, loadinfolen,
	loadinfotextindex, xcoff_init_loadinfo, free_loadinfo,
	xcoff_add_toc_to_loadinfo, add_text_to_loadinfo, find_toc_address):
	Remove.
	(_initialize_rs6000_tdep):  Remove initialization of
	coff_add_toc_to_loadinfo_hook and xcoff_init_loadinfo_hook.
	* xcoffread.c (coff_add_toc_to_loadinfo_hook,
	xcoff_init_loadinfo_hook):  Remove.
	(struct coff_symfile_info):  Add toc_offset field.
	(scan_xcoff_symtab):  Record toc_offset value in toc_offset field
	instead of calling xcoff_add_toc_to_loadinfo_hook.
	(get_toc_offset):  New function to return the value of the
	toc_offset field for an object file.
	(xcoff_initial_scan):  Remove call of xcoff_init_loadinfo_hook.
	* xcoffsolib.h (add_text_to_loadinfo):  Remove declaration.
	* config/rs6000/tm-rs6000.h:  Add declarations for
	find_toc_address_hook and get_toc_offset.

1 files changed, 29 insertions, 21 deletions

diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c
index 7311055..b57054f 100644
--- a/gdb/rs6000-nat.c
+++ b/gdb/rs6000-nat.c
@@ -73,9 +73,6 @@ static void
 exec_one_dummy_insn PARAMS ((void));
 
 extern void
-add_text_to_loadinfo PARAMS ((CORE_ADDR textaddr, CORE_ADDR dataaddr));
-
-extern void
 fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta));
 
 /* Conversion from gdb-to-system special purpose register numbers.. */
@@ -248,7 +245,7 @@ exec_one_dummy_insn ()
 #define	DUMMY_INSN_ADDR	(TEXT_SEGMENT_BASE)+0x200
 
   char shadow_contents[BREAKPOINT_MAX];	/* Stash old bkpt addr contents */
-  unsigned int status, pid;
+  int status, pid;
   CORE_ADDR prev_pc;
 
   /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We assume that
@@ -623,25 +620,12 @@ xcoff_relocate_symtab (pid)
 
   errno = 0;
   ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi,
-	  MAX_LOAD_SEGS * sizeof(*ldi), ldi);
+	  MAX_LOAD_SEGS * sizeof(*ldi), (int *) ldi);
   if (errno)
     perror_with_name ("ptrace ldinfo");
 
   vmap_ldinfo (ldi);
 
-  do {
-    /* We are allowed to assume CORE_ADDR == pointer.  This code is
-       native only.  */
-    add_text_to_loadinfo ((CORE_ADDR) ldi->ldinfo_textorg,
-			  (CORE_ADDR) ldi->ldinfo_dataorg);
-  } while (ldi->ldinfo_next
-	   && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
-
-#if 0
-  /* Now that we've jumbled things around, re-sort them.  */
-  sort_minimal_symbols ();
-#endif
-
   /* relocate the exec and core sections as well. */
   vmap_exec ();
 }
@@ -780,9 +764,6 @@ xcoff_relocate_core (target)
 	}
 
       vmap_symtab (vp);
-
-      add_text_to_loadinfo ((CORE_ADDR)ldip->ldinfo_textorg,
-			    (CORE_ADDR)ldip->ldinfo_dataorg);
     } while (ldip->ldinfo_next != 0);
   vmap_exec ();
   breakpoint_re_set ();
@@ -794,7 +775,30 @@ kernel_u_size ()
 {
   return (sizeof (struct user));
 }
+
+/* Under AIX, we have to pass the correct TOC pointer to a function
+   when calling functions in the inferior.
+   We try to find the relative toc offset of the objfile containing PC
+   and add the current load address of the data segment from the vmap.  */
+
+static CORE_ADDR
+find_toc_address (pc)
+     CORE_ADDR pc;
+{
+  struct vmap *vp;
 
+  for (vp = vmap; vp; vp = vp->nxt)
+    {
+      if (pc >= vp->tstart && pc < vp->tend)
+	{
+	  /* vp->objfile is only NULL for the exec file.  */
+	  return vp->dstart + get_toc_offset (vp->objfile == NULL
+					      ? symfile_objfile
+					      : vp->objfile);
+	}
+    }
+  error ("Unable to find TOC entry for pc 0x%x\n", pc);
+}
 
 /* Register that we are able to handle rs6000 core file formats. */
 
@@ -808,6 +812,10 @@ static struct core_fns rs6000_core_fns =
 void
 _initialize_core_rs6000 ()
 {
+  /* Initialize hook in rs6000-tdep.c for determining the TOC address when
+     calling functions in the inferior.  */
+  find_toc_address_hook = &find_toc_address;
+
   /* For native configurations, where this module is included, inform
      the xcoffsolib module where it can find the function for symbol table
      relocation at runtime. */