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

/* Definitions for targets which report shared library events.

   Copyright (C) 2007, 2008, 2009, 2010 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 "gdb_string.h"

DEF_VEC_O(CORE_ADDR);

/* 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 = VEC_index (gdb_xml_value_s, attributes, 0)->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 = VEC_index (gdb_xml_value_s, attributes, 0)->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 = XZALLOC (struct lm_info);
  const char *name = VEC_index (gdb_xml_value_s, attributes, 0)->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 = VEC_index (gdb_xml_value_s, attributes, 0)->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>.  */

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 }
};

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 }
};

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 }
};

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

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 }
};

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

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)
{
  struct gdb_xml_parser *parser;
  VEC(lm_info_p) *result = NULL;
  struct cleanup *before_deleting_result, *back_to;

  back_to = make_cleanup (null_cleanup, NULL);
  parser = gdb_xml_create_parser_and_cleanup (_("target library list"),
					      library_list_elements, &result);
  gdb_xml_use_dtd (parser, "library-list.dtd");

  before_deleting_result = make_cleanup (solib_target_free_library_list,
					 &result);

  if (gdb_xml_parse (parser, library) == 0)
    /* Parsed successfully, don't need to delete the result.  */
    discard_cleanups (before_deleting_result);

  do_cleanups (back_to);
  return result;
}
#endif

static struct so_list *
solib_target_current_sos (void)
{
  struct so_list *new_solib, *start = NULL, *last = NULL;
  const char *library_document;
  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;

  /* Parse the list.  */
  library_list = solib_target_parse_libraries (library_document);
  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 = XZALLOC (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)
{
  int flags = bfd_get_section_flags (sec->bfd, sec->the_bfd_section);
  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 = 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[sec->the_bfd_section->index];
  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, NULL);
}

struct target_so_ops solib_target_so_ops;

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

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;
}
Commit	Line	Data
	1	/* Definitions for targets which report shared library events.
	2
	3	Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
	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
	9	the Free Software Foundation; either version 3 of the License, or
	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
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	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"
	27	#include "solib-target.h"
	28
	29	#include "gdb_string.h"
	30
	31	DEF_VEC_O(CORE_ADDR);
	32
	33	/* Private data for each loaded library. */
	34	struct lm_info
	35	{
	36	/* The library's name. The name is normally kept in the struct
	37	so_list; it is only here during XML parsing. */
	38	char *name;
	39
	40	/* The target can either specify segment bases or section bases, not
	41	both. */
	42
	43	/* The base addresses for each independently relocatable segment of
	44	this shared library. */
	45	VEC(CORE_ADDR) *segment_bases;
	46
	47	/* The base addresses for each independently allocatable,
	48	relocatable section of this shared library. */
	49	VEC(CORE_ADDR) *section_bases;
	50
	51	/* The cached offsets for each section of this shared library,
	52	determined from SEGMENT_BASES, or SECTION_BASES. */
	53	struct section_offsets *offsets;
	54	};
	55
	56	typedef struct lm_info *lm_info_p;
	57	DEF_VEC_P(lm_info_p);
	58
	59	#if !defined(HAVE_LIBEXPAT)
	60
	61	static VEC(lm_info_p) *
	62	solib_target_parse_libraries (const char *library)
	63	{
	64	static int have_warned;
	65
	66	if (!have_warned)
	67	{
	68	have_warned = 1;
	69	warning (_("Can not parse XML library list; XML support was disabled "
	70	"at compile time"));
	71	}
	72
	73	return NULL;
	74	}
	75
	76	#else /* HAVE_LIBEXPAT */
	77
	78	#include "xml-support.h"
	79
	80	/* Handle the start of a <segment> element. */
	81
	82	static void
	83	library_list_start_segment (struct gdb_xml_parser *parser,
	84	const struct gdb_xml_element *element,
	85	void user_data, VEC(gdb_xml_value_s) attributes)
	86	{
	87	VEC(lm_info_p) **list = user_data;
	88	struct lm_info last = VEC_last (lm_info_p, list);
	89	ULONGEST *address_p = VEC_index (gdb_xml_value_s, attributes, 0)->value;
	90	CORE_ADDR address = (CORE_ADDR) *address_p;
	91
	92	if (last->section_bases != NULL)
	93	gdb_xml_error (parser,
	94	_("Library list with both segments and sections"));
	95
	96	VEC_safe_push (CORE_ADDR, last->segment_bases, &address);
	97	}
	98
	99	static void
	100	library_list_start_section (struct gdb_xml_parser *parser,
	101	const struct gdb_xml_element *element,
	102	void user_data, VEC(gdb_xml_value_s) attributes)
	103	{
	104	VEC(lm_info_p) **list = user_data;
	105	struct lm_info last = VEC_last (lm_info_p, list);
	106	ULONGEST *address_p = VEC_index (gdb_xml_value_s, attributes, 0)->value;
	107	CORE_ADDR address = (CORE_ADDR) *address_p;
	108
	109	if (last->segment_bases != NULL)
	110	gdb_xml_error (parser,
	111	_("Library list with both segments and sections"));
	112
	113	VEC_safe_push (CORE_ADDR, last->section_bases, &address);
	114	}
	115
	116	/* Handle the start of a <library> element. */
	117
	118	static void
	119	library_list_start_library (struct gdb_xml_parser *parser,
	120	const struct gdb_xml_element *element,
	121	void user_data, VEC(gdb_xml_value_s) attributes)
	122	{
	123	VEC(lm_info_p) **list = user_data;
	124	struct lm_info *item = XZALLOC (struct lm_info);
	125	const char *name = VEC_index (gdb_xml_value_s, attributes, 0)->value;
	126
	127	item->name = xstrdup (name);
	128	VEC_safe_push (lm_info_p, *list, item);
	129	}
	130
	131	static void
	132	library_list_end_library (struct gdb_xml_parser *parser,
	133	const struct gdb_xml_element *element,
	134	void user_data, const char body_text)
	135	{
	136	VEC(lm_info_p) **list = user_data;
	137	struct lm_info lm_info = VEC_last (lm_info_p, list);
	138	if (lm_info->segment_bases == NULL
	139	&& lm_info->section_bases == NULL)
	140	gdb_xml_error (parser,
	141	_("No segment or section bases defined"));
	142	}
	143
	144
	145	/* Handle the start of a <library-list> element. */
	146
	147	static void
	148	library_list_start_list (struct gdb_xml_parser *parser,
	149	const struct gdb_xml_element *element,
	150	void user_data, VEC(gdb_xml_value_s) attributes)
	151	{
	152	char *version = VEC_index (gdb_xml_value_s, attributes, 0)->value;
	153
	154	if (strcmp (version, "1.0") != 0)
	155	gdb_xml_error (parser,
	156	_("Library list has unsupported version \"%s\""),
	157	version);
	158	}
	159
	160	/* Discard the constructed library list. */
	161
	162	static void
	163	solib_target_free_library_list (void *p)
	164	{
	165	VEC(lm_info_p) **result = p;
	166	struct lm_info *info;
	167	int ix;
	168
	169	for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++)
	170	{
	171	xfree (info->name);
	172	VEC_free (CORE_ADDR, info->segment_bases);
	173	VEC_free (CORE_ADDR, info->section_bases);
	174	xfree (info);
	175	}
	176	VEC_free (lm_info_p, *result);
	177	*result = NULL;
	178	}
	179
	180	/* The allowed elements and attributes for an XML library list.
	181	The root element is a <library-list>. */
	182
	183	const struct gdb_xml_attribute segment_attributes[] = {
	184	{ "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
	185	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	186	};
	187
	188	const struct gdb_xml_attribute section_attributes[] = {
	189	{ "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
	190	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	191	};
	192
	193	const struct gdb_xml_element library_children[] = {
	194	{ "segment", segment_attributes, NULL,
	195	GDB_XML_EF_REPEATABLE \| GDB_XML_EF_OPTIONAL,
	196	library_list_start_segment, NULL },
	197	{ "section", section_attributes, NULL,
	198	GDB_XML_EF_REPEATABLE \| GDB_XML_EF_OPTIONAL,
	199	library_list_start_section, NULL },
	200	{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
	201	};
	202
	203	const struct gdb_xml_attribute library_attributes[] = {
	204	{ "name", GDB_XML_AF_NONE, NULL, NULL },
	205	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	206	};
	207
	208	const struct gdb_xml_element library_list_children[] = {
	209	{ "library", library_attributes, library_children,
	210	GDB_XML_EF_REPEATABLE \| GDB_XML_EF_OPTIONAL,
	211	library_list_start_library, library_list_end_library },
	212	{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
	213	};
	214
	215	const struct gdb_xml_attribute library_list_attributes[] = {
	216	{ "version", GDB_XML_AF_NONE, NULL, NULL },
	217	{ NULL, GDB_XML_AF_NONE, NULL, NULL }
	218	};
	219
	220	const struct gdb_xml_element library_list_elements[] = {
	221	{ "library-list", library_list_attributes, library_list_children,
	222	GDB_XML_EF_NONE, library_list_start_list, NULL },
	223	{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
	224	};
	225
	226	static VEC(lm_info_p) *
	227	solib_target_parse_libraries (const char *library)
	228	{
	229	struct gdb_xml_parser *parser;
	230	VEC(lm_info_p) *result = NULL;
	231	struct cleanup before_deleting_result, back_to;
	232
	233	back_to = make_cleanup (null_cleanup, NULL);
	234	parser = gdb_xml_create_parser_and_cleanup (_("target library list"),
	235	library_list_elements, &result);
	236	gdb_xml_use_dtd (parser, "library-list.dtd");
	237
	238	before_deleting_result = make_cleanup (solib_target_free_library_list,
	239	&result);
	240
	241	if (gdb_xml_parse (parser, library) == 0)
	242	/* Parsed successfully, don't need to delete the result. */
	243	discard_cleanups (before_deleting_result);
	244
	245	do_cleanups (back_to);
	246	return result;
	247	}
	248	#endif
	249
	250	static struct so_list *
	251	solib_target_current_sos (void)
	252	{
	253	struct so_list new_solib, start = NULL, *last = NULL;
	254	const char *library_document;
	255	VEC(lm_info_p) *library_list;
	256	struct lm_info *info;
	257	int ix;
	258
	259	/* Fetch the list of shared libraries. */
	260	library_document = target_read_stralloc (&current_target,
	261	TARGET_OBJECT_LIBRARIES,
	262	NULL);
	263	if (library_document == NULL)
	264	return NULL;
	265
	266	/* Parse the list. */
	267	library_list = solib_target_parse_libraries (library_document);
	268	if (library_list == NULL)
	269	return NULL;
	270
	271	/* Build a struct so_list for each entry on the list. */
	272	for (ix = 0; VEC_iterate (lm_info_p, library_list, ix, info); ix++)
	273	{
	274	new_solib = XZALLOC (struct so_list);
	275	strncpy (new_solib->so_name, info->name, SO_NAME_MAX_PATH_SIZE - 1);
	276	new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
	277	strncpy (new_solib->so_original_name, info->name,
	278	SO_NAME_MAX_PATH_SIZE - 1);
	279	new_solib->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
	280	new_solib->lm_info = info;
	281
	282	/* We no longer need this copy of the name. */
	283	xfree (info->name);
	284	info->name = NULL;
	285
	286	/* Add it to the list. */
	287	if (!start)
	288	last = start = new_solib;
	289	else
	290	{
	291	last->next = new_solib;
	292	last = new_solib;
	293	}
	294	}
	295
	296	/* Free the library list, but not its members. */
	297	VEC_free (lm_info_p, library_list);
	298
	299	return start;
	300	}
	301
	302	static void
	303	solib_target_special_symbol_handling (void)
	304	{
	305	/* Nothing needed. */
	306	}
	307
	308	static void
	309	solib_target_solib_create_inferior_hook (int from_tty)
	310	{
	311	/* Nothing needed. */
	312	}
	313
	314	static void
	315	solib_target_clear_solib (void)
	316	{
	317	/* Nothing needed. */
	318	}
	319
	320	static void
	321	solib_target_free_so (struct so_list *so)
	322	{
	323	gdb_assert (so->lm_info->name == NULL);
	324	xfree (so->lm_info->offsets);
	325	VEC_free (CORE_ADDR, so->lm_info->segment_bases);
	326	xfree (so->lm_info);
	327	}
	328
	329	static void
	330	solib_target_relocate_section_addresses (struct so_list *so,
	331	struct target_section *sec)
	332	{
	333	int flags = bfd_get_section_flags (sec->bfd, sec->the_bfd_section);
	334	CORE_ADDR offset;
	335
	336	/* Build the offset table only once per object file. We can not do
	337	it any earlier, since we need to open the file first. */
	338	if (so->lm_info->offsets == NULL)
	339	{
	340	int num_sections = bfd_count_sections (so->abfd);
	341
	342	so->lm_info->offsets = xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections));
	343
	344	if (so->lm_info->section_bases)
	345	{
	346	int i;
	347	asection *sect;
	348	int num_section_bases
	349	= VEC_length (CORE_ADDR, so->lm_info->section_bases);
	350	int num_alloc_sections = 0;
	351
	352	for (i = 0, sect = so->abfd->sections;
	353	sect != NULL;
	354	i++, sect = sect->next)
	355	if ((bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
	356	num_alloc_sections++;
	357
	358	if (num_alloc_sections != num_section_bases)
	359	warning (_("\
	360	Could not relocate shared library \"%s\": wrong number of ALLOC sections"),
	361	so->so_name);
	362	else
	363	{
	364	int bases_index = 0;
	365	int found_range = 0;
	366	CORE_ADDR *section_bases;
	367	section_bases = VEC_address (CORE_ADDR,
	368	so->lm_info->section_bases);
	369
	370	so->addr_low = ~(CORE_ADDR) 0;
	371	so->addr_high = 0;
	372	for (i = 0, sect = so->abfd->sections;
	373	sect != NULL;
	374	i++, sect = sect->next)
	375	{
	376	if (!(bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
	377	continue;
	378	if (bfd_section_size (so->abfd, sect) > 0)
	379	{
	380	CORE_ADDR low, high;
	381	low = section_bases[i];
	382	high = low + bfd_section_size (so->abfd, sect) - 1;
	383
	384	if (low < so->addr_low)
	385	so->addr_low = low;
	386	if (high > so->addr_high)
	387	so->addr_high = high;
	388	gdb_assert (so->addr_low <= so->addr_high);
	389	found_range = 1;
	390	}
	391	so->lm_info->offsets->offsets[i] = section_bases[bases_index];
	392	bases_index++;
	393	}
	394	if (!found_range)
	395	so->addr_low = so->addr_high = 0;
	396	gdb_assert (so->addr_low <= so->addr_high);
	397	}
	398	}
	399	else if (so->lm_info->segment_bases)
	400	{
	401	struct symfile_segment_data *data;
	402	data = get_symfile_segment_data (so->abfd);
	403	if (data == NULL)
	404	warning (_("\
	405	Could not relocate shared library \"%s\": no segments"), so->so_name);
	406	else
	407	{
	408	ULONGEST orig_delta;
	409	int i;
	410	int num_bases;
	411	CORE_ADDR *segment_bases;
	412
	413	num_bases = VEC_length (CORE_ADDR, so->lm_info->segment_bases);
	414	segment_bases = VEC_address (CORE_ADDR,
	415	so->lm_info->segment_bases);
	416
	417	if (!symfile_map_offsets_to_segments (so->abfd, data,
	418	so->lm_info->offsets,
	419	num_bases, segment_bases))
	420	warning (_("\
	421	Could not relocate shared library \"%s\": bad offsets"), so->so_name);
	422
	423	/* Find the range of addresses to report for this library in
	424	"info sharedlibrary". Report any consecutive segments
	425	which were relocated as a single unit. */
	426	gdb_assert (num_bases > 0);
	427	orig_delta = segment_bases[0] - data->segment_bases[0];
	428
	429	for (i = 1; i < data->num_segments; i++)
	430	{
	431	/* If we have run out of offsets, assume all
	432	remaining segments have the same offset. */
	433	if (i >= num_bases)
	434	continue;
	435
	436	/* If this segment does not have the same offset, do
	437	not include it in the library's range. */
	438	if (segment_bases[i] - data->segment_bases[i] != orig_delta)
	439	break;
	440	}
	441
	442	so->addr_low = segment_bases[0];
	443	so->addr_high = (data->segment_bases[i - 1]
	444	+ data->segment_sizes[i - 1]
	445	+ orig_delta);
	446	gdb_assert (so->addr_low <= so->addr_high);
	447
	448	free_symfile_segment_data (data);
	449	}
	450	}
	451	}
	452
	453	offset = so->lm_info->offsets->offsets[sec->the_bfd_section->index];
	454	sec->addr += offset;
	455	sec->endaddr += offset;
	456	}
	457
	458	static int
	459	solib_target_open_symbol_file_object (void *from_ttyp)
	460	{
	461	/* We can't locate the main symbol file based on the target's
	462	knowledge; the user has to specify it. */
	463	return 0;
	464	}
	465
	466	static int
	467	solib_target_in_dynsym_resolve_code (CORE_ADDR pc)
	468	{
	469	/* We don't have a range of addresses for the dynamic linker; there
	470	may not be one in the program's address space. So only report
	471	PLT entries (which may be import stubs). */
	472	return in_plt_section (pc, NULL);
	473	}
	474
	475	struct target_so_ops solib_target_so_ops;
	476
	477	extern initialize_file_ftype _initialize_solib_target; /* -Wmissing-prototypes */
	478
	479	void
	480	_initialize_solib_target (void)
	481	{
	482	solib_target_so_ops.relocate_section_addresses
	483	= solib_target_relocate_section_addresses;
	484	solib_target_so_ops.free_so = solib_target_free_so;
	485	solib_target_so_ops.clear_solib = solib_target_clear_solib;
	486	solib_target_so_ops.solib_create_inferior_hook
	487	= solib_target_solib_create_inferior_hook;
	488	solib_target_so_ops.special_symbol_handling
	489	= solib_target_special_symbol_handling;
	490	solib_target_so_ops.current_sos = solib_target_current_sos;
	491	solib_target_so_ops.open_symbol_file_object
	492	= solib_target_open_symbol_file_object;
	493	solib_target_so_ops.in_dynsym_resolve_code
	494	= solib_target_in_dynsym_resolve_code;
	495	solib_target_so_ops.bfd_open = solib_bfd_open;
	496	}