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

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

   Copyright 2003, 2004 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 "gdb_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, "powerpc"))
    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
	   || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 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, OPF_TRY_CWD_FIRST, 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
	   || strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 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;

/* See corelow.c:get_core_registers for values of WHICH.  */
  if (which == 0)
    {
      memcpy ((char *) &regset, core_reg_sect,
	      min (core_reg_size, sizeof (regset)));
      nto_supply_gregset ((char *) &regset);
    }
  else if (which == 2)
    {
      memcpy ((char *) &regset, core_reg_sect,
	      min (core_reg_size, sizeof (regset)));
      nto_supply_fpregset ((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 (void)
{
  add_setshow_zinteger_cmd ("nto-debug", class_maintenance,
			    &nto_internal_debugging, "\
Set QNX NTO internal debugging.", "\
Show QNX NTO internal debugging.", "\
When non-zero, nto specific debug info is\n\
displayed. Different information is displayed\n\
for different positive values.", "\
QNX NTO internal debugging is %s.",
			    NULL, NULL, &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.  */
  deprecated_add_core_fns (&regset_core_fns);
}
Commit	Line	Data
1b883d35 KW	1	/* nto-tdep.c - general QNX Neutrino target functionality.
1b883d35 KW	2
b3f42336	3	Copyright 2003, 2004 Free Software Foundation, Inc.
1b883d35 KW	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
47979a4b	24	#include "gdb_stat.h"
1b883d35 KW	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;
192cdb19	75	if (!strcmp (arch, "rs6000") \|\| !strcmp (arch, "powerpc"))
1b883d35 KW	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	}
192cdb19 KW	100	else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0
192cdb19 KW	101	\|\| strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0)
1b883d35 KW	102	{
	103	arch = "ppc";
	104	endian = "be";
	105	}
	106	else
	107	{
	108	arch = TARGET_ARCHITECTURE->arch_name;
	109	endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
	110	}
	111
	112	sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
	113
	114	buf = alloca (strlen (path_fmt) + strlen (arch_path) * 5 + 1);
	115	sprintf (buf, path_fmt, arch_path, arch_path, arch_path, arch_path,
	116	arch_path);
	117
014d698b	118	return openp (buf, OPF_TRY_CWD_FIRST, solib, o_flags, 0, temp_pathname);
1b883d35 KW	119	}
	120
	121	void
	122	nto_init_solib_absolute_prefix (void)
	123	{
	124	char buf[PATH_MAX * 2], arch_path[PATH_MAX];
	125	char nto_root, endian;
	126	const char *arch;
	127
	128	nto_root = nto_target ();
	129	if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
	130	{
	131	arch = "x86";
	132	endian = "";
	133	}
192cdb19 KW	134	else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0
192cdb19 KW	135	\|\| strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0)
1b883d35 KW	136	{
	137	arch = "ppc";
	138	endian = "be";
	139	}
	140	else
	141	{
	142	arch = TARGET_ARCHITECTURE->arch_name;
	143	endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
	144	}
	145
	146	sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
	147
	148	sprintf (buf, "set solib-absolute-prefix %s", arch_path);
	149	execute_command (buf, 0);
	150	}
	151
	152	char **
	153	nto_parse_redirection (char pargv[], char pin, char pout, char *perr)
	154	{
	155	char **argv;
	156	char in, out, err, p;
	157	int argc, i, n;
	158
	159	for (n = 0; pargv[n]; n++);
	160	if (n == 0)
	161	return NULL;
	162	in = "";
	163	out = "";
	164	err = "";
	165
	166	argv = xcalloc (n + 1, sizeof argv[0]);
	167	argc = n;
	168	for (i = 0, n = 0; n < argc; n++)
	169	{
	170	p = pargv[n];
	171	if (*p == '>')
	172	{
	173	p++;
	174	if (*p)
	175	out = p;
	176	else
	177	out = pargv[++n];
	178	}
	179	else if (*p == '<')
	180	{
	181	p++;
	182	if (*p)
	183	in = p;
	184	else
	185	in = pargv[++n];
	186	}
	187	else if (p++ == '2' && p++ == '>')
	188	{
	189	if (p == '&' && (p + 1) == '1')
	190	err = out;
	191	else if (*p)
	192	err = p;
	193	else
	194	err = pargv[++n];
	195	}
	196	else
	197	argv[i++] = pargv[n];
	198	}
	199	*pin = in;
200	*pout = out;
201	*perr = err;
202	return argv;
203	}
204
205	/* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from
206	solib-svr4.c to support nto_relocate_section_addresses
207	which is different from the svr4 version. */
208
209	struct lm_info
210	{
211	/* Pointer to copy of link map from inferior. The type is char *
212	rather than void *, so that we may use byte offsets to find the
213	various fields without the need for a cast. */
214	char *lm;
215	};
216
217	static CORE_ADDR
218	LM_ADDR (struct so_list *so)
219	{
220	struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();
221
222	return (CORE_ADDR) extract_signed_integer (so->lm_info->lm +
223	lmo->l_addr_offset,
224	lmo->l_addr_size);
225	}
226
227	static CORE_ADDR
228	nto_truncate_ptr (CORE_ADDR addr)
229	{
230	if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8)
231	/* We don't need to truncate anything, and the bit twiddling below
232	will fail due to overflow problems. */
233	return addr;
234	else
235	return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1);
236	}
237
238	Elf_Internal_Phdr *
239	find_load_phdr (bfd *abfd)
240	{
241	Elf_Internal_Phdr *phdr;
242	unsigned int i;
243
244	if (!elf_tdata (abfd))
245	return NULL;
246
247	phdr = elf_tdata (abfd)->phdr;
248	for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
249	{
250	if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
251	return phdr;
252	}
253	return NULL;
254	}
255
256	void
257	nto_relocate_section_addresses (struct so_list so, struct section_table sec)
258	{
259	/* Neutrino treats the l_addr base address field in link.h as different than
260	the base address in the System V ABI and so the offset needs to be
261	calculated and applied to relocations. */
262	Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd);
263	unsigned vaddr = phdr ? phdr->p_vaddr : 0;
264
265	sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
266	sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
267	}
268
269	static void
270	fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
271	int which, CORE_ADDR reg_addr)
272	{
273	nto_regset_t regset;
192cdb19	274
0fbc10f7 KW	275	/* See corelow.c:get_core_registers for values of WHICH. */
0fbc10f7 KW	276	if (which == 0)
1b883d35 KW	277	{
	278	memcpy ((char *) &regset, core_reg_sect,
	279	min (core_reg_size, sizeof (regset)));
	280	nto_supply_gregset ((char *) &regset);
	281	}
0fbc10f7	282	else if (which == 2)
1b883d35 KW	283	{
	284	memcpy ((char *) &regset, core_reg_sect,
	285	min (core_reg_size, sizeof (regset)));
	286	nto_supply_fpregset ((char *) &regset);
	287	}
1b883d35 KW	288	}
	289
	290	void
	291	nto_dummy_supply_regset (char *regs)
	292	{
	293	/* Do nothing. */
	294	}
	295
	296	/* Register that we are able to handle ELF file formats using standard
	297	procfs "regset" structures. */
	298	static struct core_fns regset_core_fns = {
	299	bfd_target_elf_flavour, /* core_flavour */
	300	default_check_format, /* check_format */
	301	default_core_sniffer, /* core_sniffer */
	302	fetch_core_registers, /* core_read_registers */
	303	NULL /* next */
	304	};
	305
	306	void
47979a4b	307	_initialize_nto_tdep (void)
1b883d35	308	{
b3f42336 AC	309	add_setshow_zinteger_cmd ("nto-debug", class_maintenance,
	310	&nto_internal_debugging, "\
	311	Set QNX NTO internal debugging.", "\
	312	Show QNX NTO internal debugging.", "\
47979a4b KW	313	When non-zero, nto specific debug info is\n\
47979a4b KW	314	displayed. Different information is displayed\n\
b3f42336 AC	315	for different positive values.", "\
	316	QNX NTO internal debugging is %s.",
	317	NULL, NULL, &setdebuglist, &showdebuglist);
1b883d35 KW	318
	319	/* We use SIG45 for pulses, or something, so nostop, noprint
	320	and pass them. */
	321	signal_stop_update (target_signal_from_name ("SIG45"), 0);
	322	signal_print_update (target_signal_from_name ("SIG45"), 0);
	323	signal_pass_update (target_signal_from_name ("SIG45"), 1);
	324
	325	/* By default we don't want to stop on these two, but we do want to pass. */
	326	#if defined(SIGSELECT)
	327	signal_stop_update (SIGSELECT, 0);
	328	signal_print_update (SIGSELECT, 0);
	329	signal_pass_update (SIGSELECT, 1);
	330	#endif
	331
	332	#if defined(SIGPHOTON)
	333	signal_stop_update (SIGPHOTON, 0);
	334	signal_print_update (SIGPHOTON, 0);
	335	signal_pass_update (SIGPHOTON, 1);
	336	#endif
	337
	338	/* Register core file support. */
00e32a35	339	deprecated_add_core_fns (&regset_core_fns);
1b883d35	340	}