[thirdparty/binutils-gdb.git] / gdb / nto-tdep.c

/* nto-tdep.c - general QNX Neutrino target functionality.

   Copyright 2003 Free Software Foundation, Inc.

   Contributed by QNX Software Systems Ltd.

   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
   (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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sys/stat.h>
#include "gdb_string.h"
#include "nto-tdep.h"
#include "top.h"
#include "cli/cli-decode.h"
#include "cli/cli-cmds.h"
#include "inferior.h"
#include "gdbarch.h"
#include "bfd.h"
#include "elf-bfd.h"
#include "solib-svr4.h"
#include "gdbcore.h"

#ifdef __CYGWIN__
#include <sys/cygwin.h>
#endif

#ifdef __CYGWIN__
static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6";
#elif defined(__sun__) || defined(linux)
static char default_nto_target[] = "/opt/QNXsdk/target/qnx6";
#else
static char default_nto_target[] = "";
#endif

struct nto_target_ops current_nto_target;

static char *
nto_target (void)
{
  char *p = getenv ("QNX_TARGET");

#ifdef __CYGWIN__
  static char buf[PATH_MAX];
  if (p)
    cygwin_conv_to_posix_path (p, buf);
  else
    cygwin_conv_to_posix_path (default_nto_target, buf);
  return buf;
#else
  return p ? p : default_nto_target;
#endif
}

/* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86,
   CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h.  */
int
nto_map_arch_to_cputype (const char *arch)
{
  if (!strcmp (arch, "i386") || !strcmp (arch, "x86"))
    return CPUTYPE_X86;
  if (!strcmp (arch, "rs6000") || !strcmp (arch, "ppc"))
    return CPUTYPE_PPC;
  if (!strcmp (arch, "mips"))
    return CPUTYPE_MIPS;
  if (!strcmp (arch, "arm"))
    return CPUTYPE_ARM;
  if (!strcmp (arch, "sh"))
    return CPUTYPE_SH;
  return CPUTYPE_UNKNOWN;
}

int
nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname)
{
  char *buf, arch_path[PATH_MAX], *nto_root, *endian;
  const char *arch;
  char *path_fmt = "%s/lib:%s/usr/lib:%s/usr/photon/lib\
:%s/usr/photon/dll:%s/lib/dll";

  nto_root = nto_target ();
  if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
    {
      arch = "x86";
      endian = "";
    }
  else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0)
    {
      arch = "ppc";
      endian = "be";
    }
  else
    {
      arch = TARGET_ARCHITECTURE->arch_name;
      endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
    }

  sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);

  buf = alloca (strlen (path_fmt) + strlen (arch_path) * 5 + 1);
  sprintf (buf, path_fmt, arch_path, arch_path, arch_path, arch_path,
	   arch_path);

  return openp (buf, 1, solib, o_flags, 0, temp_pathname);
}

void
nto_init_solib_absolute_prefix (void)
{
  char buf[PATH_MAX * 2], arch_path[PATH_MAX];
  char *nto_root, *endian;
  const char *arch;

  nto_root = nto_target ();
  if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
    {
      arch = "x86";
      endian = "";
    }
  else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0)
    {
      arch = "ppc";
      endian = "be";
    }
  else
    {
      arch = TARGET_ARCHITECTURE->arch_name;
      endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
    }

  sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);

  sprintf (buf, "set solib-absolute-prefix %s", arch_path);
  execute_command (buf, 0);
}

char **
nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr)
{
  char **argv;
  char *in, *out, *err, *p;
  int argc, i, n;

  for (n = 0; pargv[n]; n++);
  if (n == 0)
    return NULL;
  in = "";
  out = "";
  err = "";

  argv = xcalloc (n + 1, sizeof argv[0]);
  argc = n;
  for (i = 0, n = 0; n < argc; n++)
    {
      p = pargv[n];
      if (*p == '>')
	{
	  p++;
	  if (*p)
	    out = p;
	  else
	    out = pargv[++n];
	}
      else if (*p == '<')
	{
	  p++;
	  if (*p)
	    in = p;
	  else
	    in = pargv[++n];
	}
      else if (*p++ == '2' && *p++ == '>')
	{
	  if (*p == '&' && *(p + 1) == '1')
	    err = out;
	  else if (*p)
	    err = p;
	  else
	    err = pargv[++n];
	}
      else
	argv[i++] = pargv[n];
    }
  *pin = in;
  *pout = out;
  *perr = err;
  return argv;
}

/* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from
   solib-svr4.c to support nto_relocate_section_addresses
   which is different from the svr4 version.  */

struct lm_info
{
  /* Pointer to copy of link map from inferior.  The type is char *
     rather than void *, so that we may use byte offsets to find the
     various fields without the need for a cast.  */
  char *lm;
};

static CORE_ADDR
LM_ADDR (struct so_list *so)
{
  struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();

  return (CORE_ADDR) extract_signed_integer (so->lm_info->lm +
					     lmo->l_addr_offset,
					     lmo->l_addr_size);
}

static CORE_ADDR
nto_truncate_ptr (CORE_ADDR addr)
{
  if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8)
    /* We don't need to truncate anything, and the bit twiddling below
       will fail due to overflow problems.  */
    return addr;
  else
    return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1);
}

Elf_Internal_Phdr *
find_load_phdr (bfd *abfd)
{
  Elf_Internal_Phdr *phdr;
  unsigned int i;

  if (!elf_tdata (abfd))
    return NULL;

  phdr = elf_tdata (abfd)->phdr;
  for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
    {
      if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
	return phdr;
    }
  return NULL;
}

void
nto_relocate_section_addresses (struct so_list *so, struct section_table *sec)
{
  /* Neutrino treats the l_addr base address field in link.h as different than
     the base address in the System V ABI and so the offset needs to be
     calculated and applied to relocations.  */
  Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd);
  unsigned vaddr = phdr ? phdr->p_vaddr : 0;

  sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
  sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
}

static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
		      int which, CORE_ADDR reg_addr)
{
  nto_regset_t regset;

  nto_init_solib_absolute_prefix ();

  if (which == NTO_REG_GENERAL)
    {
      memcpy ((char *) &regset, core_reg_sect,
	      min (core_reg_size, sizeof (regset)));
      nto_supply_gregset ((char *) &regset);
    }
  else if (which == NTO_REG_FLOAT)
    {
      memcpy ((char *) &regset, core_reg_sect,
	      min (core_reg_size, sizeof (regset)));
      nto_supply_fpregset ((char *) &regset);
    }
  else if (which == NTO_REG_ALT)
    {
      memcpy ((char *) &regset, core_reg_sect,
	      min (core_reg_size, sizeof (regset)));
      nto_supply_altregset ((char *) &regset);
    }
}

void
nto_dummy_supply_regset (char *regs)
{
  /* Do nothing.  */
}

/* Register that we are able to handle ELF file formats using standard
   procfs "regset" structures.  */
static struct core_fns regset_core_fns = {
  bfd_target_elf_flavour,	/* core_flavour */
  default_check_format,		/* check_format */
  default_core_sniffer,		/* core_sniffer */
  fetch_core_registers,		/* core_read_registers */
  NULL				/* next */
};

void
_initialize_nto_tdep ()
{
  add_show_from_set (add_set_cmd ("nto-debug", class_maintenance, var_zinteger, (char *) &nto_internal_debugging, "Set QNX NTO internal debugging.\n\
When non-zero, nto specific debug info is\n\
displayed. Different information is displayed\n\
for different positive values.", &setdebuglist),
		     &showdebuglist);

  /* We use SIG45 for pulses, or something, so nostop, noprint
     and pass them.  */
  signal_stop_update (target_signal_from_name ("SIG45"), 0);
  signal_print_update (target_signal_from_name ("SIG45"), 0);
  signal_pass_update (target_signal_from_name ("SIG45"), 1);

  /* By default we don't want to stop on these two, but we do want to pass.  */
#if defined(SIGSELECT)
  signal_stop_update (SIGSELECT, 0);
  signal_print_update (SIGSELECT, 0);
  signal_pass_update (SIGSELECT, 1);
#endif

#if defined(SIGPHOTON)
  signal_stop_update (SIGPHOTON, 0);
  signal_print_update (SIGPHOTON, 0);
  signal_pass_update (SIGPHOTON, 1);
#endif

  /* Register core file support.  */
  add_core_fns (&regset_core_fns);
}
Commit	Line	Data
1b883d35 KW	1	/* nto-tdep.c - general QNX Neutrino target functionality.
	2
	3	Copyright 2003 Free Software Foundation, Inc.
	4
	5	Contributed by QNX Software Systems Ltd.
	6
	7	This file is part of GDB.
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2 of the License, or
	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with this program; if not, write to the Free Software
	21	Foundation, Inc., 59 Temple Place - Suite 330,
	22	Boston, MA 02111-1307, USA. */
	23
	24	#include <sys/stat.h>
	25	#include "gdb_string.h"
	26	#include "nto-tdep.h"
	27	#include "top.h"
	28	#include "cli/cli-decode.h"
	29	#include "cli/cli-cmds.h"
	30	#include "inferior.h"
	31	#include "gdbarch.h"
	32	#include "bfd.h"
	33	#include "elf-bfd.h"
	34	#include "solib-svr4.h"
	35	#include "gdbcore.h"
	36
	37	#ifdef __CYGWIN__
	38	#include <sys/cygwin.h>
	39	#endif
	40
	41	#ifdef __CYGWIN__
	42	static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6";
	43	#elif defined(__sun__) \|\| defined(linux)
	44	static char default_nto_target[] = "/opt/QNXsdk/target/qnx6";
	45	#else
	46	static char default_nto_target[] = "";
	47	#endif
	48
	49	struct nto_target_ops current_nto_target;
	50
	51	static char *
	52	nto_target (void)
	53	{
	54	char *p = getenv ("QNX_TARGET");
	55
	56	#ifdef __CYGWIN__
	57	static char buf[PATH_MAX];
	58	if (p)
	59	cygwin_conv_to_posix_path (p, buf);
	60	else
	61	cygwin_conv_to_posix_path (default_nto_target, buf);
	62	return buf;
	63	#else
	64	return p ? p : default_nto_target;
65	#endif
66	}
67
68	/* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86,
69	CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */
70	int
71	nto_map_arch_to_cputype (const char *arch)
72	{
73	if (!strcmp (arch, "i386") \|\| !strcmp (arch, "x86"))
74	return CPUTYPE_X86;
75	if (!strcmp (arch, "rs6000") \|\| !strcmp (arch, "ppc"))
76	return CPUTYPE_PPC;
77	if (!strcmp (arch, "mips"))
78	return CPUTYPE_MIPS;
79	if (!strcmp (arch, "arm"))
80	return CPUTYPE_ARM;
81	if (!strcmp (arch, "sh"))
82	return CPUTYPE_SH;
83	return CPUTYPE_UNKNOWN;
84	}
85
86	int
87	nto_find_and_open_solib (char solib, unsigned o_flags, char *temp_pathname)
88	{
89	char buf, arch_path[PATH_MAX], nto_root, *endian;
90	const char *arch;
91	char *path_fmt = "%s/lib:%s/usr/lib:%s/usr/photon/lib\
92	:%s/usr/photon/dll:%s/lib/dll";
93
94	nto_root = nto_target ();
95	if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
96	{
97	arch = "x86";
98	endian = "";
99	}
100	else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0)
101	{
102	arch = "ppc";
103	endian = "be";
104	}
105	else
106	{
107	arch = TARGET_ARCHITECTURE->arch_name;
108	endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
109	}
110
111	sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
112
113	buf = alloca (strlen (path_fmt) + strlen (arch_path) * 5 + 1);
114	sprintf (buf, path_fmt, arch_path, arch_path, arch_path, arch_path,
115	arch_path);
116
117	return openp (buf, 1, solib, o_flags, 0, temp_pathname);
118	}
119
120	void
121	nto_init_solib_absolute_prefix (void)
122	{
123	char buf[PATH_MAX * 2], arch_path[PATH_MAX];
124	char nto_root, endian;
125	const char *arch;
126
127	nto_root = nto_target ();
128	if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
129	{
130	arch = "x86";
131	endian = "";
132	}
133	else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0)
134	{
135	arch = "ppc";
136	endian = "be";
137	}
138	else
139	{
140	arch = TARGET_ARCHITECTURE->arch_name;
141	endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
142	}
143
144	sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
145
146	sprintf (buf, "set solib-absolute-prefix %s", arch_path);
147	execute_command (buf, 0);
148	}
149
150	char **
151	nto_parse_redirection (char pargv[], char pin, char pout, char *perr)
152	{
153	char **argv;
154	char in, out, err, p;
155	int argc, i, n;
156
157	for (n = 0; pargv[n]; n++);
158	if (n == 0)
159	return NULL;
160	in = "";
161	out = "";
162	err = "";
163
164	argv = xcalloc (n + 1, sizeof argv[0]);
165	argc = n;
166	for (i = 0, n = 0; n < argc; n++)
167	{
168	p = pargv[n];
169	if (*p == '>')
170	{
171	p++;
172	if (*p)
173	out = p;
174	else
175	out = pargv[++n];
176	}
177	else if (*p == '<')
178	{
179	p++;
180	if (*p)
181	in = p;
182	else
183	in = pargv[++n];
184	}
185	else if (p++ == '2' && p++ == '>')
186	{
187	if (p == '&' && (p + 1) == '1')
188	err = out;
189	else if (*p)
190	err = p;
191	else
192	err = pargv[++n];
193	}
194	else
195	argv[i++] = pargv[n];
196	}
197	*pin = in;
198	*pout = out;
199	*perr = err;
200	return argv;
201	}
202
203	/* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from
204	solib-svr4.c to support nto_relocate_section_addresses
205	which is different from the svr4 version. */
206
207	struct lm_info
208	{
209	/* Pointer to copy of link map from inferior. The type is char *
210	rather than void *, so that we may use byte offsets to find the
211	various fields without the need for a cast. */
212	char *lm;
213	};
214
215	static CORE_ADDR
216	LM_ADDR (struct so_list *so)
217	{
218	struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();
219
220	return (CORE_ADDR) extract_signed_integer (so->lm_info->lm +
221	lmo->l_addr_offset,
222	lmo->l_addr_size);
223	}
224
225	static CORE_ADDR
226	nto_truncate_ptr (CORE_ADDR addr)
227	{
228	if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8)
229	/* We don't need to truncate anything, and the bit twiddling below
230	will fail due to overflow problems. */
231	return addr;
232	else
233	return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1);
234	}
235
236	Elf_Internal_Phdr *
237	find_load_phdr (bfd *abfd)
238	{
239	Elf_Internal_Phdr *phdr;
240	unsigned int i;
241
242	if (!elf_tdata (abfd))
243	return NULL;
244
245	phdr = elf_tdata (abfd)->phdr;
246	for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
247	{
248	if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
249	return phdr;
250	}
251	return NULL;
252	}
253
254	void
255	nto_relocate_section_addresses (struct so_list so, struct section_table sec)
256	{
257	/* Neutrino treats the l_addr base address field in link.h as different than
258	the base address in the System V ABI and so the offset needs to be
259	calculated and applied to relocations. */
260	Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd);
261	unsigned vaddr = phdr ? phdr->p_vaddr : 0;
262
263	sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
264	sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
265	}
266
267	static void
268	fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
269	int which, CORE_ADDR reg_addr)
270	{
271	nto_regset_t regset;
272
273	nto_init_solib_absolute_prefix ();
274
275	if (which == NTO_REG_GENERAL)
276	{
277	memcpy ((char *) &regset, core_reg_sect,
278	min (core_reg_size, sizeof (regset)));
279	nto_supply_gregset ((char *) &regset);
280	}
281	else if (which == NTO_REG_FLOAT)
282	{
283	memcpy ((char *) &regset, core_reg_sect,
284	min (core_reg_size, sizeof (regset)));
285	nto_supply_fpregset ((char *) &regset);
286	}
287	else if (which == NTO_REG_ALT)
288	{
289	memcpy ((char *) &regset, core_reg_sect,
290	min (core_reg_size, sizeof (regset)));
291	nto_supply_altregset ((char *) &regset);
292	}
293	}
294
295	void
296	nto_dummy_supply_regset (char *regs)
297	{
298	/* Do nothing. */
299	}
300
301	/* Register that we are able to handle ELF file formats using standard
302	procfs "regset" structures. */
303	static struct core_fns regset_core_fns = {
304	bfd_target_elf_flavour, /* core_flavour */
305	default_check_format, /* check_format */
306	default_core_sniffer, /* core_sniffer */
307	fetch_core_registers, /* core_read_registers */
308	NULL /* next */
309	};
310
311	void
312	_initialize_nto_tdep ()
313	{
314	add_show_from_set (add_set_cmd ("nto-debug", class_maintenance, var_zinteger, (char *) &nto_internal_debugging, "Set QNX NTO internal debugging.\n\
315	When non-zero, nto specific debug info is\n\
316	displayed. Different information is displayed\n\
317	for different positive values.", &setdebuglist),
318	&showdebuglist);
319
320	/* We use SIG45 for pulses, or something, so nostop, noprint
321	and pass them. */
322	signal_stop_update (target_signal_from_name ("SIG45"), 0);
323	signal_print_update (target_signal_from_name ("SIG45"), 0);
324	signal_pass_update (target_signal_from_name ("SIG45"), 1);
325
326	/* By default we don't want to stop on these two, but we do want to pass. */
327	#if defined(SIGSELECT)
328	signal_stop_update (SIGSELECT, 0);
329	signal_print_update (SIGSELECT, 0);
330	signal_pass_update (SIGSELECT, 1);
331	#endif
332
333	#if defined(SIGPHOTON)
334	signal_stop_update (SIGPHOTON, 0);
335	signal_print_update (SIGPHOTON, 0);
336	signal_pass_update (SIGPHOTON, 1);
337	#endif
338
339	/* Register core file support. */
340	add_core_fns (&regset_core_fns);
341	}