/* Handle FR-V (FDPIC) shared libraries for GDB, the GNU Debugger.
- Copyright (C) 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
This file is part of GDB.
ext_ptr l_next, l_prev; /* struct link_map *l_next, *l_prev; */
};
-/* Link map info to include in an allocated so_list entry */
+/* Link map info to include in an allocated so_list entry. */
struct lm_info
{
caching of the dynamic relocations could be dispensed with. */
asymbol **dyn_syms;
arelent **dyn_relocs;
- int dyn_reloc_count; /* number of dynamic relocs. */
+ int dyn_reloc_count; /* Number of dynamic relocs. */
};
static CORE_ADDR main_got (void);
static int enable_break2 (void);
-/*
-
- LOCAL FUNCTION
-
- bfd_lookup_symbol -- lookup the value for a specific symbol
-
- SYNOPSIS
-
- CORE_ADDR bfd_lookup_symbol (bfd *abfd, char *symname)
-
- DESCRIPTION
-
- An expensive way to lookup the value of a single symbol for
- bfd's that are only temporary anyway. This is used by the
- shared library support to find the address of the debugger
- interface structures in the shared library.
-
- Note that 0 is specifically allowed as an error return (no
- such symbol).
- */
-
-static CORE_ADDR
-bfd_lookup_symbol (bfd *abfd, char *symname)
-{
- long storage_needed;
- asymbol *sym;
- asymbol **symbol_table;
- unsigned int number_of_symbols;
- unsigned int i;
- struct cleanup *back_to;
- CORE_ADDR symaddr = 0;
-
- storage_needed = bfd_get_symtab_upper_bound (abfd);
-
- if (storage_needed > 0)
- {
- symbol_table = (asymbol **) xmalloc (storage_needed);
- back_to = make_cleanup (xfree, symbol_table);
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
-
- for (i = 0; i < number_of_symbols; i++)
- {
- sym = *symbol_table++;
- if (strcmp (sym->name, symname) == 0)
- {
- /* Bfd symbols are section relative. */
- symaddr = sym->value + sym->section->vma;
- break;
- }
- }
- do_cleanups (back_to);
- }
-
- if (symaddr)
- return symaddr;
-
- /* Look for the symbol in the dynamic string table too. */
-
- storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd);
-
- if (storage_needed > 0)
- {
- symbol_table = (asymbol **) xmalloc (storage_needed);
- back_to = make_cleanup (xfree, symbol_table);
- number_of_symbols = bfd_canonicalize_dynamic_symtab (abfd, symbol_table);
-
- for (i = 0; i < number_of_symbols; i++)
- {
- sym = *symbol_table++;
- if (strcmp (sym->name, symname) == 0)
- {
- /* Bfd symbols are section relative. */
- symaddr = sym->value + sym->section->vma;
- break;
- }
- }
- do_cleanups (back_to);
- }
-
- return symaddr;
-}
-
-
-/*
-
- LOCAL FUNCTION
-
- open_symbol_file_object
-
- SYNOPSIS
-
- void open_symbol_file_object (void *from_tty)
-
- DESCRIPTION
-
- If no open symbol file, attempt to locate and open the main symbol
- file.
-
- If FROM_TTYP dereferences to a non-zero integer, allow messages to
- be printed. This parameter is a pointer rather than an int because
- open_symbol_file_object() is called via catch_errors() and
- catch_errors() requires a pointer argument. */
+/* Implement the "open_symbol_file_object" target_so_ops method. */
static int
open_symbol_file_object (void *from_ttyp)
}
-/* LOCAL FUNCTION
-
- frv_current_sos -- build a list of currently loaded shared objects
-
- SYNOPSIS
-
- struct so_list *frv_current_sos ()
-
- DESCRIPTION
-
- Build a list of `struct so_list' objects describing the shared
- objects currently loaded in the inferior. This list does not
- include an entry for the main executable file.
-
- Note that we only gather information directly available from the
- inferior --- we don't examine any of the shared library files
- themselves. The declaration of `struct so_list' says which fields
- we provide values for. */
+/* Implement the "current_sos" target_so_ops method. */
static struct so_list *
frv_current_sos (void)
/* Locate the address of the first link map struct. */
lm_addr = lm_base ();
- /* We have at least one link map entry. Fetch the the lot of them,
+ /* We have at least one link map entry. Fetch the lot of them,
building the solist chain. */
while (lm_addr)
{
"current_sos: reading link_map entry at %s\n",
hex_string_custom (lm_addr, 8));
- if (target_read_memory (lm_addr, (gdb_byte *) &lm_buf, sizeof (lm_buf)) != 0)
+ if (target_read_memory (lm_addr, (gdb_byte *) &lm_buf,
+ sizeof (lm_buf)) != 0)
{
- warning (_("frv_current_sos: Unable to read link map entry. Shared object chain may be incomplete."));
+ warning (_("frv_current_sos: Unable to read link map entry. "
+ "Shared object chain may be incomplete."));
break;
}
loadmap = fetch_loadmap (addr);
if (loadmap == NULL)
{
- warning (_("frv_current_sos: Unable to fetch load map. Shared object chain may be incomplete."));
+ warning (_("frv_current_sos: Unable to fetch load map. "
+ "Shared object chain may be incomplete."));
break;
}
"and track explicitly loaded dynamic code."));
}
-/*
+/* Helper function for gdb_bfd_lookup_symbol. */
- LOCAL FUNCTION
-
- enable_break -- arrange for dynamic linker to hit breakpoint
-
- SYNOPSIS
-
- int enable_break (void)
+static int
+cmp_name (asymbol *sym, void *data)
+{
+ return (strcmp (sym->name, (const char *) data) == 0);
+}
- DESCRIPTION
+/* Arrange for dynamic linker to hit breakpoint.
The dynamic linkers has, as part of its debugger interface, support
for arranging for the inferior to hit a breakpoint after mapping in
using the interpreter's loadmap. Once the relocated address
is known, we fetch the value (address) corresponding to r_brk
and then use that value to fetch the entry point of the function
- we're interested in.
-
- */
+ we're interested in. */
static int enable_break2_done = 0;
interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect);
}
- addr = bfd_lookup_symbol (tmp_bfd, "_dl_debug_addr");
+ addr = gdb_bfd_lookup_symbol (tmp_bfd, cmp_name, "_dl_debug_addr");
+
if (addr == 0)
{
- warning (_("Could not find symbol _dl_debug_addr in dynamic linker"));
+ warning (_("Could not find symbol _dl_debug_addr "
+ "in dynamic linker"));
enable_break_failure_warning ();
bfd_close (tmp_bfd);
return 0;
if (solib_frv_debug)
fprintf_unfiltered (gdb_stdlog,
- "enable_break: _dl_debug_addr (prior to relocation) = %s\n",
+ "enable_break: _dl_debug_addr "
+ "(prior to relocation) = %s\n",
hex_string_custom (addr, 8));
addr += displacement_from_map (ldm, addr);
if (solib_frv_debug)
fprintf_unfiltered (gdb_stdlog,
- "enable_break: _dl_debug_addr (after relocation) = %s\n",
+ "enable_break: _dl_debug_addr "
+ "(after relocation) = %s\n",
hex_string_custom (addr, 8));
/* Fetch the address of the r_debug struct. */
if (target_read_memory (addr, addr_buf, sizeof addr_buf) != 0)
{
- warning (_("Unable to fetch contents of _dl_debug_addr (at address %s) from dynamic linker"),
+ warning (_("Unable to fetch contents of _dl_debug_addr "
+ "(at address %s) from dynamic linker"),
hex_string_custom (addr, 8));
}
addr = extract_unsigned_integer (addr_buf, sizeof addr_buf, byte_order);
_dl_debug_addr. */
if (target_read_memory (addr + 8, addr_buf, sizeof addr_buf) != 0)
{
- warning (_("Unable to fetch _dl_debug_addr->r_brk (at address %s) from dynamic linker"),
+ warning (_("Unable to fetch _dl_debug_addr->r_brk "
+ "(at address %s) from dynamic linker"),
hex_string_custom (addr + 8, 8));
enable_break_failure_warning ();
bfd_close (tmp_bfd);
/* Now fetch the function entry point. */
if (target_read_memory (addr, addr_buf, sizeof addr_buf) != 0)
{
- warning (_("Unable to fetch _dl_debug_addr->.r_brk entry point (at address %s) from dynamic linker"),
+ warning (_("Unable to fetch _dl_debug_addr->.r_brk entry point "
+ "(at address %s) from dynamic linker"),
hex_string_custom (addr, 8));
enable_break_failure_warning ();
bfd_close (tmp_bfd);
if (solib_frv_debug)
fprintf_unfiltered (gdb_stdlog,
- "enable_break: solib event breakpoint placed at entry point: %s\n",
- hex_string_custom (symfile_objfile->ei.entry_point, 8));
+ "enable_break: solib event breakpoint "
+ "placed at entry point: %s\n",
+ hex_string_custom (symfile_objfile->ei.entry_point,
+ 8));
return 1;
}
-/*
-
- LOCAL FUNCTION
-
- special_symbol_handling -- additional shared library symbol handling
-
- SYNOPSIS
-
- void special_symbol_handling ()
-
- DESCRIPTION
-
- Once the symbols from a shared object have been loaded in the usual
- way, we are called to do any system specific symbol handling that
- is needed.
-
- */
+/* Implement the "special_symbol_handling" target_so_ops method. */
static void
frv_special_symbol_handling (void)
{
- /* Nothing needed (yet) for FRV. */
+ /* Nothing needed for FRV. */
}
static void
main_executable_lm_info->got_value = main_got ();
}
-/*
-
- GLOBAL FUNCTION
-
- frv_solib_create_inferior_hook -- shared library startup support
-
- SYNOPSIS
-
- void frv_solib_create_inferior_hook ()
-
- DESCRIPTION
-
- When gdb starts up the inferior, it nurses it along (through the
- shell) until it is ready to execute it's first instruction. At this
- point, this function gets called via expansion of the macro
- SOLIB_CREATE_INFERIOR_HOOK.
+/* Implement the "create_inferior_hook" target_solib_ops method.
- For the FR-V shared library ABI (FDPIC), the main executable
- needs to be relocated. The shared library breakpoints also need
- to be enabled.
- */
+ For the FR-V shared library ABI (FDPIC), the main executable needs
+ to be relocated. The shared library breakpoints also need to be
+ enabled. */
static void
frv_solib_create_inferior_hook (int from_tty)
{
struct minimal_symbol *got_sym;
- got_sym = lookup_minimal_symbol ("_GLOBAL_OFFSET_TABLE_", NULL, symfile_objfile);
+ got_sym = lookup_minimal_symbol ("_GLOBAL_OFFSET_TABLE_",
+ NULL, symfile_objfile);
if (got_sym == 0)
return 0;
so = so->next;
}
- /* Didn't find it it any of the shared objects. So assume it's in the
+ /* Didn't find it in any of the shared objects. So assume it's in the
main executable. */
return main_got ();
}
projects / deliverable / binutils-gdb.git / blobdiff