Implement get_syscall_trapinfo for aarch64-linux

[deliverable/binutils-gdb.git] / gdb / minsyms.c

diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index fd7fcd9fa56578f389108100765473286729b5e6..b47840264b78258031212a534251563a79606259 100644 (file)
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -1,5 +1,5 @@
 /* GDB routines for manipulating the minimal symbol tables.
-   Copyright (C) 1992-2014 Free Software Foundation, Inc.
+   Copyright (C) 1992-2016 Free Software Foundation, Inc.
    Contributed by Cygnus Support, using pieces from other GDB modules.
 
    This file is part of GDB.
@@ -50,6 +50,7 @@
 #include "cp-support.h"
 #include "language.h"
 #include "cli/cli-utils.h"
+#include "symbol.h"
 
 /* Accumulate the minimal symbols for each objfile in bunches of BUNCH_SIZE.
    At the end, copy them all into one newly allocated location on an objfile's
@@ -202,6 +203,14 @@ lookup_minimal_symbol (const char *name, const char *sfile,
             and the second over the demangled hash table.  */
         int pass;
 
+       if (symbol_lookup_debug)
+         {
+           fprintf_unfiltered (gdb_stdlog,
+                               "lookup_minimal_symbol (%s, %s, %s)\n",
+                               name, sfile != NULL ? sfile : "NULL",
+                               objfile_debug_name (objfile));
+         }
+
         for (pass = 1; pass <= 2 && found_symbol.minsym == NULL; pass++)
            {
             /* Select hash list according to pass.  */
@@ -281,13 +290,42 @@ lookup_minimal_symbol (const char *name, const char *sfile,
 
   /* External symbols are best.  */
   if (found_symbol.minsym != NULL)
-    return found_symbol;
+    {
+      if (symbol_lookup_debug)
+       {
+         fprintf_unfiltered (gdb_stdlog,
+                             "lookup_minimal_symbol (...) = %s"
+                             " (external)\n",
+                             host_address_to_string (found_symbol.minsym));
+       }
+      return found_symbol;
+    }
 
   /* File-local symbols are next best.  */
   if (found_file_symbol.minsym != NULL)
-    return found_file_symbol;
+    {
+      if (symbol_lookup_debug)
+       {
+         fprintf_unfiltered (gdb_stdlog,
+                             "lookup_minimal_symbol (...) = %s"
+                             " (file-local)\n",
+                             host_address_to_string
+                               (found_file_symbol.minsym));
+       }
+      return found_file_symbol;
+    }
 
   /* Symbols for shared library trampolines are next best.  */
+  if (symbol_lookup_debug)
+    {
+      fprintf_unfiltered (gdb_stdlog,
+                         "lookup_minimal_symbol (...) = %s%s\n",
+                         trampoline_symbol.minsym != NULL
+                         ? host_address_to_string (trampoline_symbol.minsym)
+                         : "NULL",
+                         trampoline_symbol.minsym != NULL
+                         ? " (trampoline)" : "");
+    }
   return trampoline_symbol;
 }
 
@@ -299,6 +337,21 @@ lookup_bound_minimal_symbol (const char *name)
   return lookup_minimal_symbol (name, NULL, NULL);
 }
 
+/* See common/symbol.h.  */
+
+int
+find_minimal_symbol_address (const char *name, CORE_ADDR *addr,
+                            struct objfile *objfile)
+{
+  struct bound_minimal_symbol sym
+    = lookup_minimal_symbol (name, NULL, objfile);
+
+  if (sym.minsym != NULL)
+    *addr = BMSYMBOL_VALUE_ADDRESS (sym);
+
+  return sym.minsym == NULL;
+}
+
 /* See minsyms.h.  */
 
 void
@@ -497,7 +550,7 @@ lookup_minimal_symbol_by_pc_section_1 (CORE_ADDR pc_in,
 {
   int lo;
   int hi;
-  int new;
+  int newobj;
   struct objfile *objfile;
   struct minimal_symbol *msymbol;
   struct minimal_symbol *best_symbol = NULL;
@@ -564,15 +617,15 @@ lookup_minimal_symbol_by_pc_section_1 (CORE_ADDR pc_in,
                {
                  /* pc is still strictly less than highest address.  */
                  /* Note "new" will always be >= lo.  */
-                 new = (lo + hi) / 2;
-                 if ((MSYMBOL_VALUE_RAW_ADDRESS (&msymbol[new]) >= pc)
-                     || (lo == new))
+                 newobj = (lo + hi) / 2;
+                 if ((MSYMBOL_VALUE_RAW_ADDRESS (&msymbol[newobj]) >= pc)
+                     || (lo == newobj))
                    {
-                     hi = new;
+                     hi = newobj;
                    }
                  else
                    {
-                     lo = new;
+                     lo = newobj;
                    }
                }
 
@@ -644,10 +697,10 @@ lookup_minimal_symbol_by_pc_section_1 (CORE_ADDR pc_in,
                     symbol isn't an object or function (e.g. a
                     label), or it may just mean that the size was not
                     specified.  */
-                 if (MSYMBOL_SIZE (&msymbol[hi]) == 0
-                     && best_zero_sized == -1)
+                 if (MSYMBOL_SIZE (&msymbol[hi]) == 0)
                    {
-                     best_zero_sized = hi;
+                     if (best_zero_sized == -1)
+                       best_zero_sized = hi;
                      hi--;
                      continue;
                    }
@@ -921,8 +974,7 @@ prim_record_minimal_symbol_full (const char *name, int name_len, int copy_name,
                                 int section,
                                 struct objfile *objfile)
 {
-  struct obj_section *obj_section;
-  struct msym_bunch *new;
+  struct msym_bunch *newobj;
   struct minimal_symbol *msymbol;
 
   /* Don't put gcc_compiled, __gnu_compiled_cplus, and friends into
@@ -943,15 +995,15 @@ prim_record_minimal_symbol_full (const char *name, int name_len, int copy_name,
       --name_len;
     }
 
-  if (ms_type == mst_file_text && strncmp (name, "__gnu_compiled", 14) == 0)
+  if (ms_type == mst_file_text && startswith (name, "__gnu_compiled"))
     return (NULL);
 
   if (msym_bunch_index == BUNCH_SIZE)
     {
-      new = XCNEW (struct msym_bunch);
+      newobj = XCNEW (struct msym_bunch);
       msym_bunch_index = 0;
-      new->next = msym_bunch;
-      msym_bunch = new;
+      newobj->next = msym_bunch;
+      msym_bunch = newobj;
     }
   msymbol = &msym_bunch->contents[msym_bunch_index];
   MSYMBOL_SET_LANGUAGE (msymbol, language_auto,
@@ -1254,7 +1306,7 @@ install_minimal_symbols (struct objfile *objfile)
 
       mcount = compact_minimal_symbols (msymbols, mcount, objfile);
 
-      obstack_blank (&objfile->per_bfd->storage_obstack,
+      obstack_blank_fast (&objfile->per_bfd->storage_obstack,
               (mcount + 1 - alloc_count) * sizeof (struct minimal_symbol));
       msymbols = (struct minimal_symbol *)
        obstack_finish (&objfile->per_bfd->storage_obstack);