* irix5-nat.c, osfsolib.c, solib.c (symbol_add_stub): Handle

	missing or zero-sized .text sections properly.
	* mdebugread.c:  Handle scRConst and scSUndefined storage classes.
	* stabsread.c (scan_file_globals):  Try to resolve symbols
	for shared libraries from the minimal symbol table of the main
	executable first.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b829c45..78f8b25 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+Sat Nov  2 03:54:13 1996  Peter Schauer  (pes@regent.e-technik.tu-muenchen.de)
+
+       * irix5-nat.c, osfsolib.c, solib.c (symbol_add_stub):  Handle
+       missing or zero-sized .text sections properly.
+       * mdebugread.c:  Handle scRConst and scSUndefined storage classes.
+       * stabsread.c (scan_file_globals):  Try to resolve symbols
+       for shared libraries from the minimal symbol table of the main
+       executable first.
+
 start-sanitize-d10v
 Fri Nov  1 13:59:28 1996  Martin M. Hunt  <hunt@pizza.cygnus.com>
 

diff --git a/gdb/irix5-nat.c b/gdb/irix5-nat.c
index 8490968..7bba96d 100644 (file)
--- a/gdb/irix5-nat.c
+++ b/gdb/irix5-nat.c
@@ -566,9 +566,28 @@ symbol_add_stub (arg)
      char *arg;
 {
   register struct so_list *so = (struct so_list *) arg;        /* catch_errs bogon */
+  CORE_ADDR text_addr = 0;
+
+  if (so -> textsection)
+    text_addr = so -> textsection -> addr;
+  else
+    {
+      asection *lowest_sect;
+
+      /* If we didn't find a mapped non zero sized .text section, set up
+        text_addr so that the relocation in symbol_file_add does no harm.  */
+
+      lowest_sect = bfd_get_section_by_name (so -> abfd, ".text");
+      if (lowest_sect == NULL)
+       bfd_map_over_sections (so -> abfd, find_lowest_section,
+                              (PTR) &lowest_sect);
+      if (lowest_sect)
+       text_addr = bfd_section_vma (so -> abfd, lowest_sect)
+                   + (CORE_ADDR) LM_ADDR (so) - so -> lm.o_base_address;
+    }
   
   so -> objfile = symbol_file_add (so -> lm.o_path, so -> from_tty,
-                                  (unsigned int) so -> textsection -> addr,
+                                  text_addr,
                                   0, 0, 0);
   return (1);
 }

diff --git a/gdb/mdebugread.c b/gdb/mdebugread.c
index c86fb6d..e0d4625 100644 (file)
--- a/gdb/mdebugread.c
+++ b/gdb/mdebugread.c
@@ -721,6 +721,7 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
   switch (sh->sc)
     {
     case scText:
+    case scRConst:
       /* Do not relocate relative values.
         The value of a stEnd symbol is the displacement from the
         corresponding start symbol value.
@@ -790,7 +791,8 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
       add_symbol (s, b);
 
       /* Type could be missing if file is compiled without debugging info.  */
-      if (sh->sc == scUndefined || sh->sc == scNil || sh->index == indexNil)
+      if (sh->sc == scUndefined || sh->sc == scSUndefined
+         || sh->sc == scNil || sh->index == indexNil)
        SYMBOL_TYPE (s) = nodebug_var_symbol_type;
       else
        SYMBOL_TYPE (s) = parse_type (cur_fd, ax, sh->index, 0, bigend, name);
@@ -849,7 +851,7 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
       SYMBOL_NAMESPACE (s) = VAR_NAMESPACE;
       SYMBOL_CLASS (s) = LOC_BLOCK;
       /* Type of the return value */
-      if (sh->sc == scUndefined || sh->sc == scNil)
+      if (sh->sc == scUndefined || sh->sc == scSUndefined || sh->sc == scNil)
        t = mdebug_type_int;
       else
        {
@@ -898,7 +900,7 @@ parse_symbol (sh, ax, ext_sh, bigend, section_offsets)
       add_block (b, top_stack->cur_st);
 
       /* Not if we only have partial info */
-      if (sh->sc == scUndefined || sh->sc == scNil)
+      if (sh->sc == scUndefined || sh->sc == scSUndefined || sh->sc == scNil)
        break;
 
       push_parse_stack ();
@@ -2081,7 +2083,8 @@ parse_external (es, bigend, section_offsets)
     }
 
   /* Reading .o files */
-  if (es->asym.sc == scUndefined || es->asym.sc == scNil)
+  if (es->asym.sc == scUndefined || es->asym.sc == scSUndefined
+      || es->asym.sc == scNil)
     {
       char *what;
       switch (es->asym.st)
@@ -2387,7 +2390,8 @@ parse_partial_symbols (objfile, section_offsets)
       extern_tab[fdr_to_pst[ext_in->ifd].globals_offset
                 + fdr_to_pst[ext_in->ifd].n_globals++] = *ext_in;
 
-      if (ext_in->asym.sc == scUndefined || ext_in->asym.sc == scNil)
+      if (ext_in->asym.sc == scUndefined || ext_in->asym.sc == scSUndefined
+         || ext_in->asym.sc == scNil)
        continue;
 
       name = debug_info->ssext + ext_in->asym.iss;
@@ -2612,6 +2616,7 @@ parse_partial_symbols (objfile, section_offsets)
                      switch (sh.sc)
                        {
                        case scUndefined:
+                       case scSUndefined:
                        case scNil:
                        case scAbs:
                          break;
@@ -2677,7 +2682,8 @@ parse_partial_symbols (objfile, section_offsets)
                }
 
              /* Non absolute static symbols go into the minimal table.  */
-             if (sh.sc == scUndefined || sh.sc == scNil
+             if (sh.sc == scUndefined || sh.sc == scSUndefined
+                 || sh.sc == scNil
                  || (sh.index == indexNil
                      && (sh.st != stStatic || sh.sc == scAbs)))
                {
@@ -2691,6 +2697,7 @@ parse_partial_symbols (objfile, section_offsets)
              switch (sh.sc)
                {
                case scText:
+               case scRConst:
                  /* The value of a stEnd symbol is the displacement from the
                     corresponding start symbol value, do not relocate it.  */
                  if (sh.st != stEnd)
@@ -2895,13 +2902,15 @@ parse_partial_symbols (objfile, section_offsets)
              psh = &ext_ptr->asym;
 
              /* Do not add undefined symbols to the partial symbol table.  */
-             if (psh->sc == scUndefined || psh->sc == scNil)
+             if (psh->sc == scUndefined || psh->sc == scSUndefined
+                 || psh->sc == scNil)
                continue;
 
              svalue = psh->value;
              switch (psh->sc)
                {
                case scText:
+               case scRConst:
                  svalue += ANOFFSET (section_offsets, SECT_OFF_TEXT);
                  break;
                case scData:

diff --git a/gdb/osfsolib.c b/gdb/osfsolib.c
index 85afa24..ea07208 100644 (file)
--- a/gdb/osfsolib.c
+++ b/gdb/osfsolib.c
@@ -566,9 +566,27 @@ symbol_add_stub (arg)
      char *arg;
 {
   register struct so_list *so = (struct so_list *) arg;        /* catch_errs bogon */
+  CORE_ADDR text_addr = 0;
+
+  if (so -> textsection)
+    text_addr = so -> textsection -> addr;
+  else
+    {
+      asection *lowest_sect;
+
+      /* If we didn't find a mapped non zero sized .text section, set up
+        text_addr so that the relocation in symbol_file_add does no harm.  */
+
+      lowest_sect = bfd_get_section_by_name (so -> abfd, ".text");
+      if (lowest_sect == NULL)
+       bfd_map_over_sections (so -> abfd, find_lowest_section,
+                              (PTR) &lowest_sect);
+      if (lowest_sect)
+       text_addr = bfd_section_vma (so -> abfd, lowest_sect) + LM_OFFSET (so);
+    }
   
   so -> objfile = symbol_file_add (so -> so_name, so -> from_tty,
-                                  so -> textsection -> addr,
+                                  text_addr,
                                   0, 0, 0);
   return (1);
 }

diff --git a/gdb/stabsread.c b/gdb/stabsread.c
index be312af..175415d 100644 (file)
--- a/gdb/stabsread.c
+++ b/gdb/stabsread.c
@@ -4491,87 +4491,105 @@ scan_file_globals (objfile)
   int hash;
   struct minimal_symbol *msymbol;
   struct symbol *sym, *prev;
+  struct objfile *resolve_objfile;
 
-  /* Avoid expensive loop through all minimal symbols if there are
-     no unresolved symbols.  */
-  for (hash = 0; hash < HASHSIZE; hash++)
-    {
-      if (global_sym_chain[hash])
-       break;
-    }
-  if (hash >= HASHSIZE)
-    return;
+  /* SVR4 based linkers copy referenced global symbols from shared
+     libraries to the main executable.
+     If we are scanning the symbols for a shared library, try to resolve
+     them from the minimal symbols of the main executable first.  */
 
-  for (msymbol = objfile -> msymbols;
-       msymbol && SYMBOL_NAME (msymbol) != NULL;
-       msymbol++)
-    {
-      QUIT;
+  if (symfile_objfile && objfile != symfile_objfile)
+    resolve_objfile = symfile_objfile;
+  else
+    resolve_objfile = objfile;
 
-      /* Skip static symbols.  */
-      switch (MSYMBOL_TYPE (msymbol))
+  while (1)
+    {
+      /* Avoid expensive loop through all minimal symbols if there are
+        no unresolved symbols.  */
+      for (hash = 0; hash < HASHSIZE; hash++)
        {
-       case mst_file_text:
-       case mst_file_data:
-       case mst_file_bss:
-         continue;
-       default:
-         break;
+         if (global_sym_chain[hash])
+           break;
        }
+      if (hash >= HASHSIZE)
+       return;
 
-      prev = NULL;
+      for (msymbol = resolve_objfile -> msymbols;
+          msymbol && SYMBOL_NAME (msymbol) != NULL;
+          msymbol++)
+       {
+         QUIT;
 
-      /* Get the hash index and check all the symbols
-        under that hash index. */
+         /* Skip static symbols.  */
+         switch (MSYMBOL_TYPE (msymbol))
+           {
+           case mst_file_text:
+           case mst_file_data:
+           case mst_file_bss:
+             continue;
+           default:
+             break;
+           }
 
-      hash = hashname (SYMBOL_NAME (msymbol));
+         prev = NULL;
 
-      for (sym = global_sym_chain[hash]; sym;)
-       {
-         if (SYMBOL_NAME (msymbol)[0] == SYMBOL_NAME (sym)[0] &&
-             STREQ(SYMBOL_NAME (msymbol) + 1, SYMBOL_NAME (sym) + 1))
+         /* Get the hash index and check all the symbols
+            under that hash index. */
+
+         hash = hashname (SYMBOL_NAME (msymbol));
+
+         for (sym = global_sym_chain[hash]; sym;)
            {
-             /* Splice this symbol out of the hash chain and
-                assign the value we have to it. */
-             if (prev)
-               {
-                 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
-               }
-             else
+             if (SYMBOL_NAME (msymbol)[0] == SYMBOL_NAME (sym)[0] &&
+                 STREQ(SYMBOL_NAME (msymbol) + 1, SYMBOL_NAME (sym) + 1))
                {
-                 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
-               }
-             
-             /* Check to see whether we need to fix up a common block.  */
-             /* Note: this code might be executed several times for
-                the same symbol if there are multiple references.  */
+                 /* Splice this symbol out of the hash chain and
+                    assign the value we have to it. */
+                 if (prev)
+                   {
+                     SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
+                   }
+                 else
+                   {
+                     global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
+                   }
+                 
+                 /* Check to see whether we need to fix up a common block.  */
+                 /* Note: this code might be executed several times for
+                    the same symbol if there are multiple references.  */
 
-             if (SYMBOL_CLASS (sym) == LOC_BLOCK)
-               {
-                 fix_common_block (sym, SYMBOL_VALUE_ADDRESS (msymbol));
-               }
-             else
-               {
-                 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msymbol);
-               }
+                 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
+                   {
+                     fix_common_block (sym, SYMBOL_VALUE_ADDRESS (msymbol));
+                   }
+                 else
+                   {
+                     SYMBOL_VALUE_ADDRESS (sym)
+                       = SYMBOL_VALUE_ADDRESS (msymbol);
+                   }
 
-             SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
-             
-             if (prev)
-               {
-                 sym = SYMBOL_VALUE_CHAIN (prev);
+                 SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
+                 
+                 if (prev)
+                   {
+                     sym = SYMBOL_VALUE_CHAIN (prev);
+                   }
+                 else
+                   {
+                     sym = global_sym_chain[hash];
+                   }
                }
              else
                {
-                 sym = global_sym_chain[hash];
+                 prev = sym;
+                 sym = SYMBOL_VALUE_CHAIN (sym);
                }
            }
-         else
-           {
-             prev = sym;
-             sym = SYMBOL_VALUE_CHAIN (sym);
-           }
        }
+      if (resolve_objfile == objfile)
+       break;
+      resolve_objfile = objfile;
     }
 
   /* Change the storage class of any remaining unresolved globals to
@@ -4593,7 +4611,7 @@ scan_file_globals (objfile)
            SYMBOL_CLASS (prev) = LOC_UNRESOLVED;
          else
            complain (&unresolved_sym_chain_complaint,
-                     objfile->name, SYMBOL_NAME (prev));
+                     objfile -> name, SYMBOL_NAME (prev));
        }
     }
   memset (global_sym_chain, 0, sizeof (global_sym_chain));