/* GDB routines for manipulating the minimal symbol tables.
- Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright 1992, 93, 94, 96, 97, 1998 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file contains support routines for creating, manipulating, and
#include "defs.h"
-#include <string.h>
+#include "gdb_string.h"
#include "symtab.h"
#include "bfd.h"
#include "symfile.h"
#endif
break;
- case mst_solib_trampoline:
+ case mst_solib_trampoline:
/* If a trampoline symbol is found, we prefer to
keep looking for the *real* symbol. If the
struct minimal_symbol *msymbol;
struct minimal_symbol *found_symbol = NULL;
struct minimal_symbol *found_file_symbol = NULL;
- struct minimal_symbol *trampoline_symbol = NULL;
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
if (sfile != NULL)
return NULL;
}
+/* Look through all the current minimal symbol tables and find the
+ first minimal symbol that matches NAME and of solib trampoline type.
+ If OBJF is non-NULL, limit
+ the search to that objfile. If SFILE is non-NULL, limit the search
+ to that source file. Returns a pointer to the minimal symbol that
+ matches, or NULL if no match is found.
+*/
+
+struct minimal_symbol *
+lookup_minimal_symbol_solib_trampoline (name, sfile, objf)
+ register const char *name;
+ const char *sfile;
+ struct objfile *objf;
+{
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ struct minimal_symbol *found_symbol = NULL;
+
+#ifdef SOFUN_ADDRESS_MAYBE_MISSING
+ if (sfile != NULL)
+ {
+ char *p = strrchr (sfile, '/');
+ if (p != NULL)
+ sfile = p + 1;
+ }
+#endif
+
+ for (objfile = object_files;
+ objfile != NULL && found_symbol == NULL;
+ objfile = objfile -> next)
+ {
+ if (objf == NULL || objf == objfile)
+ {
+ for (msymbol = objfile -> msymbols;
+ msymbol != NULL && SYMBOL_NAME (msymbol) != NULL &&
+ found_symbol == NULL;
+ msymbol++)
+ {
+ if (SYMBOL_MATCHES_NAME (msymbol, name) &&
+ MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
+ return msymbol;
+ }
+ }
+ }
+
+ return NULL;
+}
+
-/* Search through the minimal symbol table for each objfile and find the
- symbol whose address is the largest address that is still less than or
- equal to PC. Returns a pointer to the minimal symbol if such a symbol
- is found, or NULL if PC is not in a suitable range. Note that we need
- to look through ALL the minimal symbol tables before deciding on the
- symbol that comes closest to the specified PC. This is because objfiles
- can overlap, for example objfile A has .text at 0x100 and .data at 0x40000
- and objfile B has .text at 0x234 and .data at 0x40048. */
+/* Search through the minimal symbol table for each objfile and find
+ the symbol whose address is the largest address that is still less
+ than or equal to PC, and matches SECTION (if non-null). Returns a
+ pointer to the minimal symbol if such a symbol is found, or NULL if
+ PC is not in a suitable range. Note that we need to look through
+ ALL the minimal symbol tables before deciding on the symbol that
+ comes closest to the specified PC. This is because objfiles can
+ overlap, for example objfile A has .text at 0x100 and .data at
+ 0x40000 and objfile B has .text at 0x234 and .data at 0x40048. */
struct minimal_symbol *
-lookup_minimal_symbol_by_pc (pc)
- register CORE_ADDR pc;
+lookup_minimal_symbol_by_pc_section (pc, section)
+ CORE_ADDR pc;
+ asection *section;
{
- register int lo;
- register int hi;
- register int new;
- register struct objfile *objfile;
- register struct minimal_symbol *msymbol;
- register struct minimal_symbol *best_symbol = NULL;
+ int lo;
+ int hi;
+ int new;
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ struct minimal_symbol *best_symbol = NULL;
+
+ /* pc has to be in a known section. This ensures that anything beyond
+ the end of the last segment doesn't appear to be part of the last
+ function in the last segment. */
+ if (find_pc_section (pc) == NULL)
+ return NULL;
for (objfile = object_files;
objfile != NULL;
Warning: this code is trickier than it would appear at first. */
- /* Should also requires that pc is <= end of objfile. FIXME! */
+ /* Should also require that pc is <= end of objfile. FIXME! */
if (pc >= SYMBOL_VALUE_ADDRESS (&msymbol[lo]))
{
while (SYMBOL_VALUE_ADDRESS (&msymbol[hi]) > pc)
lo = new;
}
}
+
+ /* If we have multiple symbols at the same address, we want
+ hi to point to the last one. That way we can find the
+ right symbol if it has an index greater than hi. */
+ while (hi < objfile -> minimal_symbol_count - 1
+ && (SYMBOL_VALUE_ADDRESS (&msymbol[hi])
+ == SYMBOL_VALUE_ADDRESS (&msymbol[hi+1])))
+ hi++;
+
/* The minimal symbol indexed by hi now is the best one in this
objfile's minimal symbol table. See if it is the best one
overall. */
&& msymbol[hi].type == mst_abs)
--hi;
+ /* If "section" specified, skip any symbol from wrong section */
+ /* This is the new code that distinguishes it from the old function */
+ if (section)
+ while (hi >= 0
+ && SYMBOL_BFD_SECTION (&msymbol[hi]) != section)
+ --hi;
+
if (hi >= 0
&& ((best_symbol == NULL) ||
(SYMBOL_VALUE_ADDRESS (best_symbol) <
return (best_symbol);
}
+/* Backward compatibility: search through the minimal symbol table
+ for a matching PC (no section given) */
+
+struct minimal_symbol *
+lookup_minimal_symbol_by_pc (pc)
+ CORE_ADDR pc;
+{
+ return lookup_minimal_symbol_by_pc_section (pc, find_pc_mapped_section (pc));
+}
+
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
CORE_ADDR
find_stab_function_addr (namestring, pst, objfile)
if (p == NULL)
p = namestring;
n = p - namestring;
- p = alloca (n + 1);
+ p = alloca (n + 2);
strncpy (p, namestring, n);
p[n] = 0;
msym = lookup_minimal_symbol (p, pst->filename, objfile);
+ if (msym == NULL)
+ {
+ /* Sun Fortran appends an underscore to the minimal symbol name,
+ try again with an appended underscore if the minimal symbol
+ was not found. */
+ p[n] = '_';
+ p[n + 1] = 0;
+ msym = lookup_minimal_symbol (p, pst->filename, objfile);
+ }
return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
}
#endif /* SOFUN_ADDRESS_MAYBE_MISSING */
}
prim_record_minimal_symbol_and_info (name, address, ms_type,
- NULL, section, objfile);
+ NULL, section, NULL, objfile);
}
/* Record a minimal symbol in the msym bunches. Returns the symbol
newly created. */
+
struct minimal_symbol *
prim_record_minimal_symbol_and_info (name, address, ms_type, info, section,
- objfile)
+ bfd_section, objfile)
const char *name;
CORE_ADDR address;
enum minimal_symbol_type ms_type;
char *info;
int section;
+ asection *bfd_section;
struct objfile *objfile;
{
register struct msym_bunch *new;
if (name[0] == 'g'
&& (strcmp (name, GCC_COMPILED_FLAG_SYMBOL) == 0
|| strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0))
- return;
+ return (NULL);
{
const char *tempstring = name;
if (tempstring[0] == get_symbol_leading_char (objfile->obfd))
++tempstring;
if (STREQN (tempstring, "__gnu_compiled", 14))
- return;
+ return (NULL);
}
}
msym_bunch = new;
}
msymbol = &msym_bunch -> contents[msym_bunch_index];
- SYMBOL_NAME (msymbol) = (char *) name;
+ SYMBOL_NAME (msymbol) = obsavestring ((char *) name, strlen (name),
+ &objfile->symbol_obstack);
SYMBOL_INIT_LANGUAGE_SPECIFIC (msymbol, language_unknown);
SYMBOL_VALUE_ADDRESS (msymbol) = address;
SYMBOL_SECTION (msymbol) = section;
+ SYMBOL_BFD_SECTION (msymbol) = bfd_section;
MSYMBOL_TYPE (msymbol) = ms_type;
/* FIXME: This info, if it remains, needs its own field. */
MSYMBOL_INFO (msymbol) = info; /* FIXME! */
msym_bunch_index++;
msym_count++;
+ OBJSTAT (objfile, n_minsyms++);
return msymbol;
}
/* Compare two minimal symbols by address and return a signed result based
- on unsigned comparisons, so that we sort into unsigned numeric order. */
+ on unsigned comparisons, so that we sort into unsigned numeric order.
+ Within groups with the same address, sort by name. */
static int
compare_minimal_symbols (fn1p, fn2p)
if (SYMBOL_VALUE_ADDRESS (fn1) < SYMBOL_VALUE_ADDRESS (fn2))
{
- return (-1);
+ return (-1); /* addr 1 is less than addr 2 */
}
else if (SYMBOL_VALUE_ADDRESS (fn1) > SYMBOL_VALUE_ADDRESS (fn2))
{
- return (1);
+ return (1); /* addr 1 is greater than addr 2 */
}
- else
+ else /* addrs are equal: sort by name */
{
- return (0);
+ char *name1 = SYMBOL_NAME (fn1);
+ char *name2 = SYMBOL_NAME (fn2);
+
+ if (name1 && name2) /* both have names */
+ return strcmp (name1, name2);
+ else if (name2)
+ return 1; /* fn1 has no name, so it is "less" */
+ else if (name1) /* fn2 has no name, so it is "less" */
+ return -1;
+ else
+ return (0); /* neither has a name, so they're equal. */
}
}
projects / thirdparty / binutils-gdb.git / blobdiff