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| Current File : //usr/src/contrib/gdb/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 "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, 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
|| 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 *) ®set, core_reg_sect,
min (core_reg_size, sizeof (regset)));
nto_supply_gregset ((char *) ®set);
}
else if (which == 2)
{
memcpy ((char *) ®set, core_reg_sect,
min (core_reg_size, sizeof (regset)));
nto_supply_fpregset ((char *) ®set);
}
}
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_cmd ("nto-debug", class_maintenance, var_zinteger,
&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.", "Show QNX NTO internal debugging.\n",
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. */
add_core_fns (®set_core_fns);
}