[deliverable/binutils-gdb.git] / gdb / solib-target.c

/* Definitions for targets which report shared library events.

   Copyright (C) 2007-2014 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 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   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, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "objfiles.h"
#include "solist.h"
#include "symtab.h"
#include "symfile.h"
#include "target.h"
#include "vec.h"
#include "solib-target.h"

#include <string.h>

/* Private data for each loaded library.  */
struct lm_info
{
  /* The library's name.  The name is normally kept in the struct
     so_list; it is only here during XML parsing.  */
  char *name;

  /* The target can either specify segment bases or section bases, not
     both.  */

  /* The base addresses for each independently relocatable segment of
     this shared library.  */
  VEC(CORE_ADDR) *segment_bases;

  /* The base addresses for each independently allocatable,
     relocatable section of this shared library.  */
  VEC(CORE_ADDR) *section_bases;

  /* The cached offsets for each section of this shared library,
     determined from SEGMENT_BASES, or SECTION_BASES.  */
  struct section_offsets *offsets;
};

typedef struct lm_info *lm_info_p;
DEF_VEC_P(lm_info_p);

#if !defined(HAVE_LIBEXPAT)

static VEC(lm_info_p) *
solib_target_parse_libraries (const char *library)
{
  static int have_warned;

  if (!have_warned)
    {
      have_warned = 1;
      warning (_("Can not parse XML library list; XML support was disabled "
		 "at compile time"));
    }

  return NULL;
}

#else /* HAVE_LIBEXPAT */

#include "xml-support.h"

/* Handle the start of a <segment> element.  */

static void
library_list_start_segment (struct gdb_xml_parser *parser,
			    const struct gdb_xml_element *element,
			    void *user_data, VEC(gdb_xml_value_s) *attributes)
{
  VEC(lm_info_p) **list = user_data;
  struct lm_info *last = VEC_last (lm_info_p, *list);
  ULONGEST *address_p = xml_find_attribute (attributes, "address")->value;
  CORE_ADDR address = (CORE_ADDR) *address_p;

  if (last->section_bases != NULL)
    gdb_xml_error (parser,
		   _("Library list with both segments and sections"));

  VEC_safe_push (CORE_ADDR, last->segment_bases, address);
}

static void
library_list_start_section (struct gdb_xml_parser *parser,
			    const struct gdb_xml_element *element,
			    void *user_data, VEC(gdb_xml_value_s) *attributes)
{
  VEC(lm_info_p) **list = user_data;
  struct lm_info *last = VEC_last (lm_info_p, *list);
  ULONGEST *address_p = xml_find_attribute (attributes, "address")->value;
  CORE_ADDR address = (CORE_ADDR) *address_p;

  if (last->segment_bases != NULL)
    gdb_xml_error (parser,
		   _("Library list with both segments and sections"));

  VEC_safe_push (CORE_ADDR, last->section_bases, address);
}

/* Handle the start of a <library> element.  */

static void
library_list_start_library (struct gdb_xml_parser *parser,
			    const struct gdb_xml_element *element,
			    void *user_data, VEC(gdb_xml_value_s) *attributes)
{
  VEC(lm_info_p) **list = user_data;
  struct lm_info *item = XCNEW (struct lm_info);
  const char *name = xml_find_attribute (attributes, "name")->value;

  item->name = xstrdup (name);
  VEC_safe_push (lm_info_p, *list, item);
}

static void
library_list_end_library (struct gdb_xml_parser *parser,
			  const struct gdb_xml_element *element,
			  void *user_data, const char *body_text)
{
  VEC(lm_info_p) **list = user_data;
  struct lm_info *lm_info = VEC_last (lm_info_p, *list);

  if (lm_info->segment_bases == NULL
      && lm_info->section_bases == NULL)
    gdb_xml_error (parser,
		   _("No segment or section bases defined"));
}


/* Handle the start of a <library-list> element.  */

static void
library_list_start_list (struct gdb_xml_parser *parser,
			 const struct gdb_xml_element *element,
			 void *user_data, VEC(gdb_xml_value_s) *attributes)
{
  char *version = xml_find_attribute (attributes, "version")->value;

  if (strcmp (version, "1.0") != 0)
    gdb_xml_error (parser,
		   _("Library list has unsupported version \"%s\""),
		   version);
}

/* Discard the constructed library list.  */

static void
solib_target_free_library_list (void *p)
{
  VEC(lm_info_p) **result = p;
  struct lm_info *info;
  int ix;

  for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++)
    {
      xfree (info->name);
      VEC_free (CORE_ADDR, info->segment_bases);
      VEC_free (CORE_ADDR, info->section_bases);
      xfree (info);
    }
  VEC_free (lm_info_p, *result);
  *result = NULL;
}

/* The allowed elements and attributes for an XML library list.
   The root element is a <library-list>.  */

static const struct gdb_xml_attribute segment_attributes[] = {
  { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
  { NULL, GDB_XML_AF_NONE, NULL, NULL }
};

static const struct gdb_xml_attribute section_attributes[] = {
  { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
  { NULL, GDB_XML_AF_NONE, NULL, NULL }
};

static const struct gdb_xml_element library_children[] = {
  { "segment", segment_attributes, NULL,
    GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
    library_list_start_segment, NULL },
  { "section", section_attributes, NULL,
    GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
    library_list_start_section, NULL },
  { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};

static const struct gdb_xml_attribute library_attributes[] = {
  { "name", GDB_XML_AF_NONE, NULL, NULL },
  { NULL, GDB_XML_AF_NONE, NULL, NULL }
};

static const struct gdb_xml_element library_list_children[] = {
  { "library", library_attributes, library_children,
    GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
    library_list_start_library, library_list_end_library },
  { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};

static const struct gdb_xml_attribute library_list_attributes[] = {
  { "version", GDB_XML_AF_NONE, NULL, NULL },
  { NULL, GDB_XML_AF_NONE, NULL, NULL }
};

static const struct gdb_xml_element library_list_elements[] = {
  { "library-list", library_list_attributes, library_list_children,
    GDB_XML_EF_NONE, library_list_start_list, NULL },
  { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};

static VEC(lm_info_p) *
solib_target_parse_libraries (const char *library)
{
  VEC(lm_info_p) *result = NULL;
  struct cleanup *back_to = make_cleanup (solib_target_free_library_list,
					  &result);

  if (gdb_xml_parse_quick (_("target library list"), "library-list.dtd",
			   library_list_elements, library, &result) == 0)
    {
      /* Parsed successfully, keep the result.  */
      discard_cleanups (back_to);
      return result;
    }

  do_cleanups (back_to);
  return NULL;
}
#endif

static struct so_list *
solib_target_current_sos (void)
{
  struct so_list *new_solib, *start = NULL, *last = NULL;
  char *library_document;
  struct cleanup *old_chain;
  VEC(lm_info_p) *library_list;
  struct lm_info *info;
  int ix;

  /* Fetch the list of shared libraries.  */
  library_document = target_read_stralloc (&current_target,
					   TARGET_OBJECT_LIBRARIES,
					   NULL);
  if (library_document == NULL)
    return NULL;

  /* solib_target_parse_libraries may throw, so we use a cleanup.  */
  old_chain = make_cleanup (xfree, library_document);

  /* Parse the list.  */
  library_list = solib_target_parse_libraries (library_document);

  /* library_document string is not needed behind this point.  */
  do_cleanups (old_chain);

  if (library_list == NULL)
    return NULL;

  /* Build a struct so_list for each entry on the list.  */
  for (ix = 0; VEC_iterate (lm_info_p, library_list, ix, info); ix++)
    {
      new_solib = XCNEW (struct so_list);
      strncpy (new_solib->so_name, info->name, SO_NAME_MAX_PATH_SIZE - 1);
      new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
      strncpy (new_solib->so_original_name, info->name,
	       SO_NAME_MAX_PATH_SIZE - 1);
      new_solib->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
      new_solib->lm_info = info;

      /* We no longer need this copy of the name.  */
      xfree (info->name);
      info->name = NULL;

      /* Add it to the list.  */
      if (!start)
	last = start = new_solib;
      else
	{
	  last->next = new_solib;
	  last = new_solib;
	}
    }

  /* Free the library list, but not its members.  */
  VEC_free (lm_info_p, library_list);

  return start;
}

static void
solib_target_special_symbol_handling (void)
{
  /* Nothing needed.  */
}

static void
solib_target_solib_create_inferior_hook (int from_tty)
{
  /* Nothing needed.  */
}

static void
solib_target_clear_solib (void)
{
  /* Nothing needed.  */
}

static void
solib_target_free_so (struct so_list *so)
{
  gdb_assert (so->lm_info->name == NULL);
  xfree (so->lm_info->offsets);
  VEC_free (CORE_ADDR, so->lm_info->segment_bases);
  xfree (so->lm_info);
}

static void
solib_target_relocate_section_addresses (struct so_list *so,
					 struct target_section *sec)
{
  CORE_ADDR offset;

  /* Build the offset table only once per object file.  We can not do
     it any earlier, since we need to open the file first.  */
  if (so->lm_info->offsets == NULL)
    {
      int num_sections = gdb_bfd_count_sections (so->abfd);

      so->lm_info->offsets = xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections));

      if (so->lm_info->section_bases)
	{
	  int i;
	  asection *sect;
	  int num_section_bases
	    = VEC_length (CORE_ADDR, so->lm_info->section_bases);
	  int num_alloc_sections = 0;

	  for (i = 0, sect = so->abfd->sections;
	       sect != NULL;
	       i++, sect = sect->next)
	    if ((bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
	      num_alloc_sections++;

	  if (num_alloc_sections != num_section_bases)
	    warning (_("\
Could not relocate shared library \"%s\": wrong number of ALLOC sections"),
		     so->so_name);
	  else
	    {
	      int bases_index = 0;
	      int found_range = 0;
	      CORE_ADDR *section_bases;

	      section_bases = VEC_address (CORE_ADDR,
					   so->lm_info->section_bases);

	      so->addr_low = ~(CORE_ADDR) 0;
	      so->addr_high = 0;
	      for (i = 0, sect = so->abfd->sections;
		   sect != NULL;
		   i++, sect = sect->next)
		{
		  if (!(bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
		    continue;
		  if (bfd_section_size (so->abfd, sect) > 0)
		    {
		      CORE_ADDR low, high;

		      low = section_bases[i];
		      high = low + bfd_section_size (so->abfd, sect) - 1;

		      if (low < so->addr_low)
			so->addr_low = low;
		      if (high > so->addr_high)
			so->addr_high = high;
		      gdb_assert (so->addr_low <= so->addr_high);
		      found_range = 1;
		    }
		  so->lm_info->offsets->offsets[i]
		    = section_bases[bases_index];
		  bases_index++;
		}
	      if (!found_range)
		so->addr_low = so->addr_high = 0;
	      gdb_assert (so->addr_low <= so->addr_high);
	    }
	}
      else if (so->lm_info->segment_bases)
	{
	  struct symfile_segment_data *data;

	  data = get_symfile_segment_data (so->abfd);
	  if (data == NULL)
	    warning (_("\
Could not relocate shared library \"%s\": no segments"), so->so_name);
	  else
	    {
	      ULONGEST orig_delta;
	      int i;
	      int num_bases;
	      CORE_ADDR *segment_bases;

	      num_bases = VEC_length (CORE_ADDR, so->lm_info->segment_bases);
	      segment_bases = VEC_address (CORE_ADDR,
					   so->lm_info->segment_bases);

	      if (!symfile_map_offsets_to_segments (so->abfd, data,
						    so->lm_info->offsets,
						    num_bases, segment_bases))
		warning (_("\
Could not relocate shared library \"%s\": bad offsets"), so->so_name);

	      /* Find the range of addresses to report for this library in
		 "info sharedlibrary".  Report any consecutive segments
		 which were relocated as a single unit.  */
	      gdb_assert (num_bases > 0);
	      orig_delta = segment_bases[0] - data->segment_bases[0];

	      for (i = 1; i < data->num_segments; i++)
		{
		  /* If we have run out of offsets, assume all
		     remaining segments have the same offset.  */
		  if (i >= num_bases)
		    continue;

		  /* If this segment does not have the same offset, do
		     not include it in the library's range.  */
		  if (segment_bases[i] - data->segment_bases[i] != orig_delta)
		    break;
		}

	      so->addr_low = segment_bases[0];
	      so->addr_high = (data->segment_bases[i - 1]
			       + data->segment_sizes[i - 1]
			       + orig_delta);
	      gdb_assert (so->addr_low <= so->addr_high);

	      free_symfile_segment_data (data);
	    }
	}
    }

  offset = so->lm_info->offsets->offsets[gdb_bfd_section_index
					 (sec->the_bfd_section->owner,
					  sec->the_bfd_section)];
  sec->addr += offset;
  sec->endaddr += offset;
}

static int
solib_target_open_symbol_file_object (void *from_ttyp)
{
  /* We can't locate the main symbol file based on the target's
     knowledge; the user has to specify it.  */
  return 0;
}

static int
solib_target_in_dynsym_resolve_code (CORE_ADDR pc)
{
  /* We don't have a range of addresses for the dynamic linker; there
     may not be one in the program's address space.  So only report
     PLT entries (which may be import stubs).  */
  return in_plt_section (pc);
}

struct target_so_ops solib_target_so_ops;

/* -Wmissing-prototypes */
extern initialize_file_ftype _initialize_solib_target;

void
_initialize_solib_target (void)
{
  solib_target_so_ops.relocate_section_addresses
    = solib_target_relocate_section_addresses;
  solib_target_so_ops.free_so = solib_target_free_so;
  solib_target_so_ops.clear_solib = solib_target_clear_solib;
  solib_target_so_ops.solib_create_inferior_hook
    = solib_target_solib_create_inferior_hook;
  solib_target_so_ops.special_symbol_handling
    = solib_target_special_symbol_handling;
  solib_target_so_ops.current_sos = solib_target_current_sos;
  solib_target_so_ops.open_symbol_file_object
    = solib_target_open_symbol_file_object;
  solib_target_so_ops.in_dynsym_resolve_code
    = solib_target_in_dynsym_resolve_code;
  solib_target_so_ops.bfd_open = solib_bfd_open;

  /* Set current_target_so_ops to solib_target_so_ops if not already
     set.  */
  if (current_target_so_ops == 0)
    current_target_so_ops = &solib_target_so_ops;
}
Commit	Line	Data
cfa9d6d9 DJ	1	/* Definitions for targets which report shared library events.
cfa9d6d9 DJ	2
ecd75fc8	3	Copyright (C) 2007-2014 Free Software Foundation, Inc.
cfa9d6d9 DJ	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
a9762ec7	9	the Free Software Foundation; either version 3 of the License, or
cfa9d6d9 DJ	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
a9762ec7	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
cfa9d6d9 DJ	19
	20	#include "defs.h"
	21	#include "objfiles.h"
	22	#include "solist.h"
	23	#include "symtab.h"
	24	#include "symfile.h"
	25	#include "target.h"
	26	#include "vec.h"
8d465389	27	#include "solib-target.h"
cfa9d6d9	28
0e9f083f	29	#include <string.h>
cfa9d6d9	30
cfa9d6d9 DJ	31	/* Private data for each loaded library. */
	32	struct lm_info
	33	{
	34	/* The library's name. The name is normally kept in the struct
	35	so_list; it is only here during XML parsing. */
	36	char *name;
	37
1fddbabb PA	38	/* The target can either specify segment bases or section bases, not
	39	both. */
	40
cfa9d6d9 DJ	41	/* The base addresses for each independently relocatable segment of
	42	this shared library. */
	43	VEC(CORE_ADDR) *segment_bases;
	44
1fddbabb PA	45	/* The base addresses for each independently allocatable,
	46	relocatable section of this shared library. */
	47	VEC(CORE_ADDR) *section_bases;
	48
cfa9d6d9	49	/* The cached offsets for each section of this shared library,
1fddbabb	50	determined from SEGMENT_BASES, or SECTION_BASES. */
cfa9d6d9 DJ	51	struct section_offsets *offsets;
	52	};
	53
	54	typedef struct lm_info *lm_info_p;
	55	DEF_VEC_P(lm_info_p);
	56
	57	#if !defined(HAVE_LIBEXPAT)
	58
899cff7a	59	static VEC(lm_info_p) *
cfa9d6d9 DJ	60	solib_target_parse_libraries (const char *library)
	61	{
	62	static int have_warned;
	63
	64	if (!have_warned)
	65	{
	66	have_warned = 1;
	67	warning (_("Can not parse XML library list; XML support was disabled "
	68	"at compile time"));
	69	}
	70
	71	return NULL;
	72	}
	73
	74	#else /* HAVE_LIBEXPAT */
	75
	76	#include "xml-support.h"
	77
	78	/* Handle the start of a <segment> element. */
	79
	80	static void
	81	library_list_start_segment (struct gdb_xml_parser *parser,
	82	const struct gdb_xml_element *element,
	83	void user_data, VEC(gdb_xml_value_s) attributes)
	84	{
	85	VEC(lm_info_p) **list = user_data;
	86	struct lm_info last = VEC_last (lm_info_p, list);
3d2c1d41	87	ULONGEST *address_p = xml_find_attribute (attributes, "address")->value;
358eb95e	88	CORE_ADDR address = (CORE_ADDR) *address_p;
cfa9d6d9	89
1fddbabb PA	90	if (last->section_bases != NULL)
	91	gdb_xml_error (parser,
	92	_("Library list with both segments and sections"));
	93
267f6504	94	VEC_safe_push (CORE_ADDR, last->segment_bases, address);
cfa9d6d9 DJ	95	}
cfa9d6d9 DJ	96
1fddbabb PA	97	static void
	98	library_list_start_section (struct gdb_xml_parser *parser,
	99	const struct gdb_xml_element *element,
	100	void user_data, VEC(gdb_xml_value_s) attributes)
	101	{
	102	VEC(lm_info_p) **list = user_data;
	103	struct lm_info last = VEC_last (lm_info_p, list);
3d2c1d41	104	ULONGEST *address_p = xml_find_attribute (attributes, "address")->value;
1fddbabb PA	105	CORE_ADDR address = (CORE_ADDR) *address_p;
	106
	107	if (last->segment_bases != NULL)
	108	gdb_xml_error (parser,
	109	_("Library list with both segments and sections"));
	110
267f6504	111	VEC_safe_push (CORE_ADDR, last->section_bases, address);
1fddbabb PA	112	}
1fddbabb PA	113
cfa9d6d9 DJ	114	/* Handle the start of a <library> element. */
	115
	116	static void
	117	library_list_start_library (struct gdb_xml_parser *parser,
	118	const struct gdb_xml_element *element,
	119	void user_data, VEC(gdb_xml_value_s) attributes)
	120	{
	121	VEC(lm_info_p) **list = user_data;
41bf6aca	122	struct lm_info *item = XCNEW (struct lm_info);
3d2c1d41	123	const char *name = xml_find_attribute (attributes, "name")->value;
cfa9d6d9 DJ	124
	125	item->name = xstrdup (name);
	126	VEC_safe_push (lm_info_p, *list, item);
	127	}
	128
1fddbabb PA	129	static void
	130	library_list_end_library (struct gdb_xml_parser *parser,
	131	const struct gdb_xml_element *element,
	132	void user_data, const char body_text)
	133	{
	134	VEC(lm_info_p) **list = user_data;
	135	struct lm_info lm_info = VEC_last (lm_info_p, list);
433759f7	136
1fddbabb PA	137	if (lm_info->segment_bases == NULL
	138	&& lm_info->section_bases == NULL)
	139	gdb_xml_error (parser,
	140	_("No segment or section bases defined"));
	141	}
	142
	143
cfa9d6d9 DJ	144	/* Handle the start of a <library-list> element. */
	145
	146	static void
	147	library_list_start_list (struct gdb_xml_parser *parser,
	148	const struct gdb_xml_element *element,
	149	void user_data, VEC(gdb_xml_value_s) attributes)
	150	{
3d2c1d41	151	char *version = xml_find_attribute (attributes, "version")->value;
cfa9d6d9 DJ	152
	153	if (strcmp (version, "1.0") != 0)
	154	gdb_xml_error (parser,
	155	_("Library list has unsupported version \"%s\""),
	156	version);
	157	}
	158
	159	/* Discard the constructed library list. */
	160
	161	static void
	162	solib_target_free_library_list (void *p)
	163	{
	164	VEC(lm_info_p) **result = p;
	165	struct lm_info *info;
	166	int ix;
	167
	168	for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++)
	169	{
	170	xfree (info->name);
	171	VEC_free (CORE_ADDR, info->segment_bases);
1fddbabb	172	VEC_free (CORE_ADDR, info->section_bases);
cfa9d6d9 DJ	173	xfree (info);
	174	}
	175	VEC_free (lm_info_p, *result);
	176	*result = NULL;
	177	}
	178
	179	/* The allowed elements and attributes for an XML library list.
	180	The root element is a <library-list>. */
	181
d6c10e95	182	static const struct gdb_xml_attribute segment_attributes[] = {
cfa9d6d9 DJ	183	{ "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
	184	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	185	};
	186
d6c10e95	187	static const struct gdb_xml_attribute section_attributes[] = {
1fddbabb PA	188	{ "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
	189	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	190	};
	191
d6c10e95	192	static const struct gdb_xml_element library_children[] = {
1fddbabb PA	193	{ "segment", segment_attributes, NULL,
1fddbabb PA	194	GDB_XML_EF_REPEATABLE \| GDB_XML_EF_OPTIONAL,
cfa9d6d9	195	library_list_start_segment, NULL },
1fddbabb PA	196	{ "section", section_attributes, NULL,
	197	GDB_XML_EF_REPEATABLE \| GDB_XML_EF_OPTIONAL,
	198	library_list_start_section, NULL },
cfa9d6d9 DJ	199	{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
	200	};
	201
d6c10e95	202	static const struct gdb_xml_attribute library_attributes[] = {
cfa9d6d9 DJ	203	{ "name", GDB_XML_AF_NONE, NULL, NULL },
	204	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	205	};
	206
d6c10e95	207	static const struct gdb_xml_element library_list_children[] = {
cfa9d6d9 DJ	208	{ "library", library_attributes, library_children,
cfa9d6d9 DJ	209	GDB_XML_EF_REPEATABLE \| GDB_XML_EF_OPTIONAL,
1fddbabb	210	library_list_start_library, library_list_end_library },
cfa9d6d9 DJ	211	{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
	212	};
	213
d6c10e95	214	static const struct gdb_xml_attribute library_list_attributes[] = {
cfa9d6d9 DJ	215	{ "version", GDB_XML_AF_NONE, NULL, NULL },
	216	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	217	};
	218
d6c10e95	219	static const struct gdb_xml_element library_list_elements[] = {
cfa9d6d9 DJ	220	{ "library-list", library_list_attributes, library_list_children,
	221	GDB_XML_EF_NONE, library_list_start_list, NULL },
	222	{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
	223	};
	224
	225	static VEC(lm_info_p) *
	226	solib_target_parse_libraries (const char *library)
	227	{
cfa9d6d9	228	VEC(lm_info_p) *result = NULL;
efc0eabd PA	229	struct cleanup *back_to = make_cleanup (solib_target_free_library_list,
efc0eabd PA	230	&result);
cfa9d6d9	231
efc0eabd PA	232	if (gdb_xml_parse_quick (_("target library list"), "library-list.dtd",
	233	library_list_elements, library, &result) == 0)
	234	{
	235	/* Parsed successfully, keep the result. */
	236	discard_cleanups (back_to);
	237	return result;
	238	}
cfa9d6d9 DJ	239
cfa9d6d9 DJ	240	do_cleanups (back_to);
efc0eabd	241	return NULL;
cfa9d6d9 DJ	242	}
	243	#endif
	244
	245	static struct so_list *
	246	solib_target_current_sos (void)
	247	{
	248	struct so_list new_solib, start = NULL, *last = NULL;
b25d79d4 PM	249	char *library_document;
b25d79d4 PM	250	struct cleanup *old_chain;
cfa9d6d9 DJ	251	VEC(lm_info_p) *library_list;
	252	struct lm_info *info;
	253	int ix;
	254
	255	/* Fetch the list of shared libraries. */
	256	library_document = target_read_stralloc (&current_target,
	257	TARGET_OBJECT_LIBRARIES,
	258	NULL);
	259	if (library_document == NULL)
	260	return NULL;
	261
b25d79d4 PM	262	/* solib_target_parse_libraries may throw, so we use a cleanup. */
	263	old_chain = make_cleanup (xfree, library_document);
	264
cfa9d6d9 DJ	265	/* Parse the list. */
cfa9d6d9 DJ	266	library_list = solib_target_parse_libraries (library_document);
b25d79d4 PM	267
	268	/* library_document string is not needed behind this point. */
	269	do_cleanups (old_chain);
	270
cfa9d6d9 DJ	271	if (library_list == NULL)
	272	return NULL;
	273
	274	/* Build a struct so_list for each entry on the list. */
	275	for (ix = 0; VEC_iterate (lm_info_p, library_list, ix, info); ix++)
	276	{
41bf6aca	277	new_solib = XCNEW (struct so_list);
cfa9d6d9 DJ	278	strncpy (new_solib->so_name, info->name, SO_NAME_MAX_PATH_SIZE - 1);
	279	new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
	280	strncpy (new_solib->so_original_name, info->name,
	281	SO_NAME_MAX_PATH_SIZE - 1);
	282	new_solib->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
	283	new_solib->lm_info = info;
	284
	285	/* We no longer need this copy of the name. */
	286	xfree (info->name);
	287	info->name = NULL;
	288
	289	/* Add it to the list. */
	290	if (!start)
	291	last = start = new_solib;
	292	else
	293	{
	294	last->next = new_solib;
	295	last = new_solib;
	296	}
	297	}
	298
	299	/* Free the library list, but not its members. */
	300	VEC_free (lm_info_p, library_list);
	301
	302	return start;
	303	}
	304
	305	static void
	306	solib_target_special_symbol_handling (void)
	307	{
	308	/* Nothing needed. */
	309	}
	310
	311	static void
268a4a75	312	solib_target_solib_create_inferior_hook (int from_tty)
cfa9d6d9 DJ	313	{
	314	/* Nothing needed. */
	315	}
	316
	317	static void
	318	solib_target_clear_solib (void)
	319	{
	320	/* Nothing needed. */
	321	}
	322
	323	static void
	324	solib_target_free_so (struct so_list *so)
	325	{
	326	gdb_assert (so->lm_info->name == NULL);
	327	xfree (so->lm_info->offsets);
	328	VEC_free (CORE_ADDR, so->lm_info->segment_bases);
	329	xfree (so->lm_info);
	330	}
	331
	332	static void
	333	solib_target_relocate_section_addresses (struct so_list *so,
0542c86d	334	struct target_section *sec)
cfa9d6d9	335	{
cfa9d6d9 DJ	336	CORE_ADDR offset;
	337
	338	/* Build the offset table only once per object file. We can not do
	339	it any earlier, since we need to open the file first. */
	340	if (so->lm_info->offsets == NULL)
	341	{
d445b2f6	342	int num_sections = gdb_bfd_count_sections (so->abfd);
cfa9d6d9 DJ	343
	344	so->lm_info->offsets = xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections));
	345
1fddbabb	346	if (so->lm_info->section_bases)
cfa9d6d9	347	{
cfa9d6d9	348	int i;
1fddbabb PA	349	asection *sect;
	350	int num_section_bases
	351	= VEC_length (CORE_ADDR, so->lm_info->section_bases);
	352	int num_alloc_sections = 0;
	353
	354	for (i = 0, sect = so->abfd->sections;
	355	sect != NULL;
	356	i++, sect = sect->next)
	357	if ((bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
	358	num_alloc_sections++;
	359
	360	if (num_alloc_sections != num_section_bases)
	361	warning (_("\
	362	Could not relocate shared library \"%s\": wrong number of ALLOC sections"),
cfa9d6d9	363	so->so_name);
1fddbabb	364	else
cfa9d6d9	365	{
1fddbabb PA	366	int bases_index = 0;
	367	int found_range = 0;
	368	CORE_ADDR *section_bases;
433759f7	369
1fddbabb PA	370	section_bases = VEC_address (CORE_ADDR,
	371	so->lm_info->section_bases);
	372
	373	so->addr_low = ~(CORE_ADDR) 0;
	374	so->addr_high = 0;
	375	for (i = 0, sect = so->abfd->sections;
	376	sect != NULL;
	377	i++, sect = sect->next)
	378	{
	379	if (!(bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
	380	continue;
	381	if (bfd_section_size (so->abfd, sect) > 0)
	382	{
	383	CORE_ADDR low, high;
433759f7	384
1fddbabb PA	385	low = section_bases[i];
	386	high = low + bfd_section_size (so->abfd, sect) - 1;
	387
	388	if (low < so->addr_low)
	389	so->addr_low = low;
	390	if (high > so->addr_high)
	391	so->addr_high = high;
	392	gdb_assert (so->addr_low <= so->addr_high);
	393	found_range = 1;
	394	}
3e43a32a MS	395	so->lm_info->offsets->offsets[i]
3e43a32a MS	396	= section_bases[bases_index];
1fddbabb PA	397	bases_index++;
	398	}
	399	if (!found_range)
	400	so->addr_low = so->addr_high = 0;
	401	gdb_assert (so->addr_low <= so->addr_high);
	402	}
	403	}
	404	else if (so->lm_info->segment_bases)
	405	{
	406	struct symfile_segment_data *data;
433759f7	407
1fddbabb PA	408	data = get_symfile_segment_data (so->abfd);
	409	if (data == NULL)
	410	warning (_("\
	411	Could not relocate shared library \"%s\": no segments"), so->so_name);
	412	else
	413	{
	414	ULONGEST orig_delta;
	415	int i;
	416	int num_bases;
	417	CORE_ADDR *segment_bases;
	418
	419	num_bases = VEC_length (CORE_ADDR, so->lm_info->segment_bases);
	420	segment_bases = VEC_address (CORE_ADDR,
	421	so->lm_info->segment_bases);
	422
	423	if (!symfile_map_offsets_to_segments (so->abfd, data,
	424	so->lm_info->offsets,
	425	num_bases, segment_bases))
	426	warning (_("\
	427	Could not relocate shared library \"%s\": bad offsets"), so->so_name);
	428
	429	/* Find the range of addresses to report for this library in
	430	"info sharedlibrary". Report any consecutive segments
	431	which were relocated as a single unit. */
	432	gdb_assert (num_bases > 0);
	433	orig_delta = segment_bases[0] - data->segment_bases[0];
	434
	435	for (i = 1; i < data->num_segments; i++)
	436	{
	437	/* If we have run out of offsets, assume all
	438	remaining segments have the same offset. */
	439	if (i >= num_bases)
	440	continue;
	441
	442	/* If this segment does not have the same offset, do
	443	not include it in the library's range. */
	444	if (segment_bases[i] - data->segment_bases[i] != orig_delta)
	445	break;
	446	}
	447
	448	so->addr_low = segment_bases[0];
	449	so->addr_high = (data->segment_bases[i - 1]
	450	+ data->segment_sizes[i - 1]
	451	+ orig_delta);
	452	gdb_assert (so->addr_low <= so->addr_high);
	453
	454	free_symfile_segment_data (data);
cfa9d6d9	455	}
cfa9d6d9 DJ	456	}
	457	}
	458
2b2848e2 DE	459	offset = so->lm_info->offsets->offsets[gdb_bfd_section_index
	460	(sec->the_bfd_section->owner,
	461	sec->the_bfd_section)];
cfa9d6d9 DJ	462	sec->addr += offset;
	463	sec->endaddr += offset;
	464	}
	465
	466	static int
	467	solib_target_open_symbol_file_object (void *from_ttyp)
	468	{
	469	/* We can't locate the main symbol file based on the target's
	470	knowledge; the user has to specify it. */
	471	return 0;
	472	}
	473
	474	static int
	475	solib_target_in_dynsym_resolve_code (CORE_ADDR pc)
	476	{
	477	/* We don't have a range of addresses for the dynamic linker; there
	478	may not be one in the program's address space. So only report
	479	PLT entries (which may be import stubs). */
3e5d3a5a	480	return in_plt_section (pc);
cfa9d6d9 DJ	481	}
cfa9d6d9 DJ	482
8d465389	483	struct target_so_ops solib_target_so_ops;
cfa9d6d9	484
3e43a32a MS	485	/* -Wmissing-prototypes */
3e43a32a MS	486	extern initialize_file_ftype _initialize_solib_target;
cfa9d6d9 DJ	487
	488	void
	489	_initialize_solib_target (void)
	490	{
	491	solib_target_so_ops.relocate_section_addresses
	492	= solib_target_relocate_section_addresses;
	493	solib_target_so_ops.free_so = solib_target_free_so;
	494	solib_target_so_ops.clear_solib = solib_target_clear_solib;
	495	solib_target_so_ops.solib_create_inferior_hook
	496	= solib_target_solib_create_inferior_hook;
	497	solib_target_so_ops.special_symbol_handling
	498	= solib_target_special_symbol_handling;
	499	solib_target_so_ops.current_sos = solib_target_current_sos;
	500	solib_target_so_ops.open_symbol_file_object
	501	= solib_target_open_symbol_file_object;
	502	solib_target_so_ops.in_dynsym_resolve_code
	503	= solib_target_in_dynsym_resolve_code;
831a0c44	504	solib_target_so_ops.bfd_open = solib_bfd_open;
98d64339 PA	505
	506	/* Set current_target_so_ops to solib_target_so_ops if not already
	507	set. */
	508	if (current_target_so_ops == 0)
	509	current_target_so_ops = &solib_target_so_ops;
cfa9d6d9	510	}