/* Handle SOM shared libraries.
- Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "som.h"
#include "symtab.h"
#include "bfd.h"
#include "symfile.h"
#include "hppa-tdep.h"
#include "solist.h"
+#include "solib.h"
+#include "solib-som.h"
+
+#include <string.h>
#undef SOLIB_SOM_DBG
/* These ought to be defined in some public interface, but aren't. They
define the meaning of the various bits in the distinguished __dld_flags
variable that is declared in every debuggable a.out on HP-UX, and that
- is shared between the debugger and the dynamic linker.
- */
+ is shared between the debugger and the dynamic linker. */
+
#define DLD_FLAGS_MAPPRIVATE 0x1
#define DLD_FLAGS_HOOKVALID 0x2
#define DLD_FLAGS_LISTVALID 0x4
struct lm_info
{
- /* Version of this structure (it is expected to change again in hpux10). */
+ /* Version of this structure (it is expected to change again in
+ hpux10). */
unsigned char struct_version;
/* Binding mode for this library. */
};
/* These addresses should be filled in by som_solib_create_inferior_hook.
- They are also used elsewhere in this module.
- */
+ They are also used elsewhere in this module. */
+
typedef struct
{
CORE_ADDR address;
}
addr_and_unwind_t;
-/* When adding fields, be sure to clear them in _initialize_som_solib. */
+/* When adding fields, be sure to clear them in _initialize_som_solib. */
static struct
{
int is_valid;
static void
som_relocate_section_addresses (struct so_list *so,
- struct section_table *sec)
+ struct target_section *sec)
{
flagword aflag = bfd_get_section_flags(so->abfd, sec->the_bfd_section);
- /* solib.c does something similar, but it only recognizes ".text", SOM calls
- the text section "$CODE$". */
- if (strcmp (sec->the_bfd_section->name, "$CODE$") == 0)
- {
- so->textsection = sec;
- }
-
if (aflag & SEC_CODE)
{
sec->addr += so->lm_info->text_addr - so->lm_info->text_link_addr;
;
}
+
+/* Variable storing HP-UX major release number.
+
+ On non-native system, simply assume that the major release number
+ is 11. On native systems, hppa-hpux-nat.c initialization code
+ sets this number to the real one on startup.
+
+ We cannot compute this value here, because we need to make a native
+ call to "uname". We are are not allowed to do that from here, as
+ this file is used for both native and cross debugging. */
+
+#define DEFAULT_HPUX_MAJOR_RELEASE 11
+int hpux_major_release = DEFAULT_HPUX_MAJOR_RELEASE;
+
+static int
+get_hpux_major_release (void)
+{
+ return hpux_major_release;
+}
+
+/* DL header flag defines. */
+#define SHLIB_TEXT_PRIVATE_ENABLE 0x4000
+
+/* The DL header is documented in <shl.h>. We are only interested
+ in the flags field to determine whether the executable wants shared
+ libraries mapped private. */
+struct {
+ short junk[37];
+ short flags;
+} dl_header;
+
/* This hook gets called just before the first instruction in the
inferior process is executed.
means running until the "_start" is called. */
static void
-som_solib_create_inferior_hook (void)
+som_solib_create_inferior_hook (int from_tty)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
struct minimal_symbol *msymbol;
unsigned int dld_flags, status, have_endo;
asection *shlib_info;
char buf[4];
CORE_ADDR anaddr;
- /* First, remove all the solib event breakpoints. Their addresses
- may have changed since the last time we ran the program. */
- remove_solib_event_breakpoints ();
-
if (symfile_objfile == NULL)
return;
if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0)
return;
+ /* Read the DL header. */
+ bfd_get_section_contents (symfile_objfile->obfd, shlib_info,
+ (char *) &dl_header, 0, sizeof (dl_header));
+
have_endo = 0;
/* Slam the pid of the process into __d_pid.
goto keep_going;
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
- store_unsigned_integer (buf, 4, PIDGET (inferior_ptid));
+ store_unsigned_integer (buf, 4, byte_order, PIDGET (inferior_ptid));
status = target_write_memory (anaddr, buf, 4);
if (status != 0)
{
Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above,
the dld provides an export stub named "__d_trap" as well as the
function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".
- We'll look first for the old flavor and then the new.
- */
+ We'll look first for the old flavor and then the new. */
+
msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile);
if (msymbol == NULL)
msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile);
anaddr = SYMBOL_VALUE (msymbol);
dld_cache.hook_stub.address = anaddr;
}
- store_unsigned_integer (buf, 4, anaddr);
+ store_unsigned_integer (buf, 4, byte_order, anaddr);
msymbol = lookup_minimal_symbol ("__dld_hook", NULL, symfile_objfile);
if (msymbol == NULL)
GDB will be unable to track shl_load/shl_unload calls"));
goto keep_going;
}
- create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol));
+ create_solib_event_breakpoint (target_gdbarch,
+ SYMBOL_VALUE_ADDRESS (msymbol));
/* We have all the support usually found in end.o, so we can track
shl_load and shl_unload calls. */
status = target_read_memory (anaddr, buf, 4);
if (status != 0)
error (_("Unable to read __dld_flags."));
- dld_flags = extract_unsigned_integer (buf, 4);
+ dld_flags = extract_unsigned_integer (buf, 4, byte_order);
+
+ /* If the libraries were not mapped private on HP-UX 11 and later, warn
+ the user. On HP-UX 10 and earlier, there is no easy way to specify
+ that shared libraries should be privately mapped. So, we just force
+ private mapping. */
+ if (get_hpux_major_release () >= 11
+ && (dl_header.flags & SHLIB_TEXT_PRIVATE_ENABLE) == 0
+ && (dld_flags & DLD_FLAGS_MAPPRIVATE) == 0)
+ warning
+ (_("\
+Private mapping of shared library text was not specified\n\
+by the executable; setting a breakpoint in a shared library which\n\
+is not privately mapped will not work. See the HP-UX 11i v3 chatr\n\
+manpage for methods to privately map shared library text."));
/* Turn on the flags we care about. */
- dld_flags |= DLD_FLAGS_MAPPRIVATE;
+ if (get_hpux_major_release () < 11)
+ dld_flags |= DLD_FLAGS_MAPPRIVATE;
if (have_endo)
dld_flags |= DLD_FLAGS_HOOKVALID;
- store_unsigned_integer (buf, 4, dld_flags);
+ store_unsigned_integer (buf, 4, byte_order, dld_flags);
status = target_write_memory (anaddr, buf, 4);
if (status != 0)
error (_("Unable to write __dld_flags."));
- /* Now find the address of _start and set a breakpoint there.
+ /* Now find the address of _start and set a breakpoint there.
We still need this code for two reasons:
* Not all sites have /opt/langtools/lib/end.o, so it's not always
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
/* Make the breakpoint at "_start" a shared library event breakpoint. */
- create_solib_event_breakpoint (anaddr);
+ create_solib_event_breakpoint (target_gdbarch, anaddr);
- clear_symtab_users ();
+ clear_symtab_users (0);
}
static void
we've no work to do.
(If you add clauses to this test, be sure to likewise update the
- test within the loop.)
- */
+ test within the loop.) */
+
if (dld_cache.is_valid)
return;
objfile);
if (dld_msymbol != NULL)
{
- if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline)
+ if (MSYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline)
{
u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol));
if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT))
cover the body of "shl_unload", the second being 4 bytes past
the end of the first. This is a large hack to handle that
case, but since I don't seem to have any legitimate way to
- look for this thing via the symbol table...
- */
+ look for this thing via the symbol table... */
+
if (dld_cache.unload.unwind != NULL)
{
u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4);
objfile);
if (dld_msymbol != NULL)
{
- if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline)
+ if (MSYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline)
{
u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol));
if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT))
}
}
- /* Did we find everything we were looking for? If so, stop. */
+ /* Did we find everything we were looking for? If so, stop. */
if ((dld_cache.load.address != 0)
&& (dld_cache.load_stub.address != 0)
&& (dld_cache.unload.address != 0)
dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address);
/* We're prepared not to find some of these symbols, which is why
- this function is a "desire" operation, and not a "require".
- */
+ this function is a "desire" operation, and not a "require". */
}
static int
weren't mapped to a (writeable) private region. However, in
that case the debugger probably isn't able to set the fundamental
breakpoint in the dld callback anyways, so this hack should be
- safe.
- */
+ safe. */
+
if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000)
return 1;
/* Cache the address of some symbols that are part of the dynamic
- linker, if not already known.
- */
+ linker, if not already known. */
+
som_solib_desire_dynamic_linker_symbols ();
- /* Are we in the dld callback? Or its export stub? */
+ /* Are we in the dld callback? Or its export stub? */
u_pc = find_unwind_entry (pc);
if (u_pc == NULL)
return 0;
if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind))
return 1;
- /* Or the interface of the dld (i.e., "shl_load" or friends)? */
+ /* Or the interface of the dld (i.e., "shl_load" or friends)? */
if ((u_pc == dld_cache.load.unwind)
|| (u_pc == dld_cache.unload.unwind)
|| (u_pc == dld_cache.unload2.unwind)
|| (u_pc == dld_cache.unload_stub.unwind))
return 1;
- /* Apparently this address isn't part of the dld's text. */
+ /* Apparently this address isn't part of the dld's text. */
return 0;
}
static CORE_ADDR
link_map_start (void)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
struct minimal_symbol *sym;
CORE_ADDR addr;
char buf[4];
error (_("Unable to find __dld_flags symbol in object file."));
addr = SYMBOL_VALUE_ADDRESS (sym);
read_memory (addr, buf, 4);
- dld_flags = extract_unsigned_integer (buf, 4);
+ dld_flags = extract_unsigned_integer (buf, 4, byte_order);
if ((dld_flags & DLD_FLAGS_LISTVALID) == 0)
error (_("__dld_list is not valid according to __dld_flags."));
- /* If the libraries were not mapped private, warn the user. */
- if ((dld_flags & DLD_FLAGS_MAPPRIVATE) == 0)
- warning (_("The shared libraries were not privately mapped; setting a\n"
- "breakpoint in a shared library will not work until you rerun the "
- "program.\n"));
-
sym = lookup_minimal_symbol ("__dld_list", NULL, NULL);
if (!sym)
{
addr = SYMBOL_VALUE_ADDRESS (sym);
read_memory (addr, buf, 4);
- addr = extract_unsigned_integer (buf, 4);
+ addr = extract_unsigned_integer (buf, 4, byte_order);
if (addr == 0)
- error (_("Debugging dynamic executables loaded via the hpux8 dld.sl is not supported."));
+ return 0;
read_memory (addr, buf, 4);
- return extract_unsigned_integer (buf, 4);
+ return extract_unsigned_integer (buf, 4, byte_order);
}
-/* Does this so's name match the main binary? */
+/* Does this so's name match the main binary? */
static int
match_main (const char *name)
{
static struct so_list *
som_current_sos (void)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
CORE_ADDR lm;
struct so_list *head = 0;
struct so_list **link_ptr = &head;
read_memory (lm, (gdb_byte *)&dbuf, sizeof (struct dld_list));
addr = extract_unsigned_integer ((gdb_byte *)&dbuf.name,
- sizeof (dbuf.name));
+ sizeof (dbuf.name), byte_order);
target_read_string (addr, &namebuf, SO_NAME_MAX_PATH_SIZE - 1, &errcode);
if (errcode != 0)
warning (_("Can't read pathname for load map: %s."),
lmi->lm_addr = lm;
#define EXTRACT(_fld) \
- extract_unsigned_integer ((gdb_byte *)&dbuf._fld, sizeof (dbuf._fld));
+ extract_unsigned_integer ((gdb_byte *)&dbuf._fld, \
+ sizeof (dbuf._fld), byte_order);
lmi->text_addr = EXTRACT (text_addr);
tmp = EXTRACT (info);
lmi->got_value = EXTRACT (got_value);
tmp = EXTRACT (tsd_start_addr_ptr);
read_memory (tmp, tsdbuf, 4);
- lmi->tsd_start_addr = extract_unsigned_integer (tsdbuf, 4);
+ lmi->tsd_start_addr
+ = extract_unsigned_integer (tsdbuf, 4, byte_order);
#ifdef SOLIB_SOM_DBG
- printf ("\n+ library \"%s\" is described at 0x%s\n", new->so_name,
- paddr_nz (lm));
+ printf ("\n+ library \"%s\" is described at %s\n", new->so_name,
+ paddress (target_gdbarch, lm));
printf (" 'version' is %d\n", new->lm_info->struct_version);
printf (" 'bind_mode' is %d\n", new->lm_info->bind_mode);
printf (" 'library_version' is %d\n",
new->lm_info->library_version);
- printf (" 'text_addr' is 0x%s\n",
- paddr_nz (new->lm_info->text_addr));
- printf (" 'text_link_addr' is 0x%s\n",
- paddr_nz (new->lm_info->text_link_addr));
- printf (" 'text_end' is 0x%s\n",
- paddr_nz (new->lm_info->text_end));
- printf (" 'data_start' is 0x%s\n",
- paddr_nz (new->lm_info->data_start));
- printf (" 'bss_start' is 0x%s\n",
- paddr_nz (new->lm_info->bss_start));
- printf (" 'data_end' is 0x%s\n",
- paddr_nz (new->lm_info->data_end));
- printf (" 'got_value' is %s\n",
- paddr_nz (new->lm_info->got_value));
- printf (" 'tsd_start_addr' is 0x%s\n",
- paddr_nz (new->lm_info->tsd_start_addr));
+ printf (" 'text_addr' is %s\n",
+ paddress (target_gdbarch, new->lm_info->text_addr));
+ printf (" 'text_link_addr' is %s\n",
+ paddress (target_gdbarch, new->lm_info->text_link_addr));
+ printf (" 'text_end' is %s\n",
+ paddress (target_gdbarch, new->lm_info->text_end));
+ printf (" 'data_start' is %s\n",
+ paddress (target_gdbarch, new->lm_info->data_start));
+ printf (" 'bss_start' is %s\n",
+ paddress (target_gdbarch, new->lm_info->bss_start));
+ printf (" 'data_end' is %s\n",
+ paddress (target_gdbarch, new->lm_info->data_end));
+ printf (" 'got_value' is %s\n",
+ paddress (target_gdbarch, new->lm_info->got_value));
+ printf (" 'tsd_start_addr' is %s\n",
+ paddress (target_gdbarch, new->lm_info->tsd_start_addr));
#endif
+ new->addr_low = lmi->text_addr;
+ new->addr_high = lmi->text_end;
+
/* Link the new object onto the list. */
new->next = NULL;
*link_ptr = new;
static int
som_open_symbol_file_object (void *from_ttyp)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
CORE_ADDR lm, l_name;
char *filename;
int errcode;
char buf[4];
if (symfile_objfile)
- if (!query ("Attempt to reload symbols from process? "))
+ if (!query (_("Attempt to reload symbols from process? ")))
return 0;
/* First link map member should be the executable. */
if ((lm = link_map_start ()) == 0)
- return 0; /* failed somehow... */
+ return 0; /* failed somehow... */
/* Read address of name from target memory to GDB. */
read_memory (lm + offsetof (struct dld_list, name), buf, 4);
/* Convert the address to host format. Assume that the address is
unsigned. */
- l_name = extract_unsigned_integer (buf, 4);
+ l_name = extract_unsigned_integer (buf, 4, byte_order);
if (l_name == 0)
return 0; /* No filename. */
return got_value;
}
-/* Return the address of the handle of the shared library in which ADDR belongs.
- If ADDR isn't in any known shared library, return zero. */
-/* this function is used in initialize_hp_cxx_exception_support in
- hppa-hpux-tdep.c */
+/* Return the address of the handle of the shared library in which
+ ADDR belongs. If ADDR isn't in any known shared library, return
+ zero. */
+/* This function is used in initialize_hp_cxx_exception_support in
+ hppa-hpux-tdep.c. */
static CORE_ADDR
som_solib_get_solib_by_pc (CORE_ADDR addr)
som_so_ops.current_sos = som_current_sos;
som_so_ops.open_symbol_file_object = som_open_symbol_file_object;
som_so_ops.in_dynsym_resolve_code = som_in_dynsym_resolve_code;
+ som_so_ops.bfd_open = solib_bfd_open;
}
-void som_solib_select (struct gdbarch_tdep *tdep)
+void
+som_solib_select (struct gdbarch *gdbarch)
{
- current_target_so_ops = &som_so_ops;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ set_solib_ops (gdbarch, &som_so_ops);
tdep->solib_thread_start_addr = som_solib_thread_start_addr;
tdep->solib_get_got_by_pc = som_solib_get_got_by_pc;
tdep->solib_get_solib_by_pc = som_solib_get_solib_by_pc;
}
/* The rest of these functions are not part of the solib interface; they
- are used by somread.c or hppa-hpux-tdep.c */
+ are used by somread.c or hppa-hpux-tdep.c. */
int
som_solib_section_offsets (struct objfile *objfile,
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