338 lines
8.5 KiB
C
338 lines
8.5 KiB
C
/* nto-tdep.c - general QNX Neutrino target functionality.
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Copyright 2003 Free Software Foundation, Inc.
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Contributed by QNX Software Systems Ltd.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "gdb_stat.h"
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#include "gdb_string.h"
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#include "nto-tdep.h"
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#include "top.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-cmds.h"
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#include "inferior.h"
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#include "gdbarch.h"
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#include "bfd.h"
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#include "elf-bfd.h"
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#include "solib-svr4.h"
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#include "gdbcore.h"
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#ifdef __CYGWIN__
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#include <sys/cygwin.h>
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#endif
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#ifdef __CYGWIN__
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static char default_nto_target[] = "C:\\QNXsdk\\target\\qnx6";
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#elif defined(__sun__) || defined(linux)
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static char default_nto_target[] = "/opt/QNXsdk/target/qnx6";
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#else
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static char default_nto_target[] = "";
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#endif
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struct nto_target_ops current_nto_target;
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static char *
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nto_target (void)
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{
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char *p = getenv ("QNX_TARGET");
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#ifdef __CYGWIN__
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static char buf[PATH_MAX];
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if (p)
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cygwin_conv_to_posix_path (p, buf);
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else
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cygwin_conv_to_posix_path (default_nto_target, buf);
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return buf;
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#else
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return p ? p : default_nto_target;
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#endif
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}
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/* Take a string such as i386, rs6000, etc. and map it onto CPUTYPE_X86,
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CPUTYPE_PPC, etc. as defined in nto-share/dsmsgs.h. */
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int
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nto_map_arch_to_cputype (const char *arch)
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{
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if (!strcmp (arch, "i386") || !strcmp (arch, "x86"))
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return CPUTYPE_X86;
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if (!strcmp (arch, "rs6000") || !strcmp (arch, "powerpc"))
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return CPUTYPE_PPC;
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if (!strcmp (arch, "mips"))
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return CPUTYPE_MIPS;
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if (!strcmp (arch, "arm"))
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return CPUTYPE_ARM;
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if (!strcmp (arch, "sh"))
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return CPUTYPE_SH;
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return CPUTYPE_UNKNOWN;
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}
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int
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nto_find_and_open_solib (char *solib, unsigned o_flags, char **temp_pathname)
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{
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char *buf, arch_path[PATH_MAX], *nto_root, *endian;
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const char *arch;
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char *path_fmt = "%s/lib:%s/usr/lib:%s/usr/photon/lib\
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:%s/usr/photon/dll:%s/lib/dll";
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nto_root = nto_target ();
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if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
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{
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arch = "x86";
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endian = "";
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}
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else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0
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|| strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0)
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{
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arch = "ppc";
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endian = "be";
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}
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else
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{
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arch = TARGET_ARCHITECTURE->arch_name;
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endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
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}
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sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
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buf = alloca (strlen (path_fmt) + strlen (arch_path) * 5 + 1);
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sprintf (buf, path_fmt, arch_path, arch_path, arch_path, arch_path,
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arch_path);
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return openp (buf, 1, solib, o_flags, 0, temp_pathname);
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}
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void
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nto_init_solib_absolute_prefix (void)
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{
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char buf[PATH_MAX * 2], arch_path[PATH_MAX];
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char *nto_root, *endian;
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const char *arch;
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nto_root = nto_target ();
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if (strcmp (TARGET_ARCHITECTURE->arch_name, "i386") == 0)
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{
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arch = "x86";
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endian = "";
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}
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else if (strcmp (TARGET_ARCHITECTURE->arch_name, "rs6000") == 0
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|| strcmp (TARGET_ARCHITECTURE->arch_name, "powerpc") == 0)
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{
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arch = "ppc";
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endian = "be";
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}
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else
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{
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arch = TARGET_ARCHITECTURE->arch_name;
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endian = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "be" : "le";
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}
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sprintf (arch_path, "%s/%s%s", nto_root, arch, endian);
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sprintf (buf, "set solib-absolute-prefix %s", arch_path);
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execute_command (buf, 0);
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}
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char **
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nto_parse_redirection (char *pargv[], char **pin, char **pout, char **perr)
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{
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char **argv;
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char *in, *out, *err, *p;
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int argc, i, n;
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for (n = 0; pargv[n]; n++);
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if (n == 0)
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return NULL;
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in = "";
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out = "";
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err = "";
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argv = xcalloc (n + 1, sizeof argv[0]);
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argc = n;
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for (i = 0, n = 0; n < argc; n++)
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{
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p = pargv[n];
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if (*p == '>')
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{
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p++;
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if (*p)
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out = p;
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else
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out = pargv[++n];
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}
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else if (*p == '<')
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{
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p++;
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if (*p)
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in = p;
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else
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in = pargv[++n];
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}
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else if (*p++ == '2' && *p++ == '>')
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{
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if (*p == '&' && *(p + 1) == '1')
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err = out;
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else if (*p)
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err = p;
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else
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err = pargv[++n];
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}
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else
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argv[i++] = pargv[n];
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}
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*pin = in;
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*pout = out;
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*perr = err;
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return argv;
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}
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/* The struct lm_info, LM_ADDR, and nto_truncate_ptr are copied from
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solib-svr4.c to support nto_relocate_section_addresses
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which is different from the svr4 version. */
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struct lm_info
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{
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/* Pointer to copy of link map from inferior. The type is char *
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rather than void *, so that we may use byte offsets to find the
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various fields without the need for a cast. */
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char *lm;
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};
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static CORE_ADDR
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LM_ADDR (struct so_list *so)
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{
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struct link_map_offsets *lmo = nto_fetch_link_map_offsets ();
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return (CORE_ADDR) extract_signed_integer (so->lm_info->lm +
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lmo->l_addr_offset,
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lmo->l_addr_size);
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}
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static CORE_ADDR
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nto_truncate_ptr (CORE_ADDR addr)
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{
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if (TARGET_PTR_BIT == sizeof (CORE_ADDR) * 8)
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/* We don't need to truncate anything, and the bit twiddling below
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will fail due to overflow problems. */
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return addr;
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else
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return addr & (((CORE_ADDR) 1 << TARGET_PTR_BIT) - 1);
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}
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Elf_Internal_Phdr *
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find_load_phdr (bfd *abfd)
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{
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Elf_Internal_Phdr *phdr;
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unsigned int i;
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if (!elf_tdata (abfd))
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return NULL;
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phdr = elf_tdata (abfd)->phdr;
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for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
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{
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if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_X))
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return phdr;
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}
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return NULL;
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}
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void
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nto_relocate_section_addresses (struct so_list *so, struct section_table *sec)
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{
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/* Neutrino treats the l_addr base address field in link.h as different than
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the base address in the System V ABI and so the offset needs to be
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calculated and applied to relocations. */
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Elf_Internal_Phdr *phdr = find_load_phdr (sec->bfd);
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unsigned vaddr = phdr ? phdr->p_vaddr : 0;
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sec->addr = nto_truncate_ptr (sec->addr + LM_ADDR (so) - vaddr);
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sec->endaddr = nto_truncate_ptr (sec->endaddr + LM_ADDR (so) - vaddr);
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}
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static void
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fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
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int which, CORE_ADDR reg_addr)
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{
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nto_regset_t regset;
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/* See corelow.c:get_core_registers for values of WHICH. */
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if (which == 0)
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{
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memcpy ((char *) ®set, core_reg_sect,
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min (core_reg_size, sizeof (regset)));
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nto_supply_gregset ((char *) ®set);
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}
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else if (which == 2)
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{
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memcpy ((char *) ®set, core_reg_sect,
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min (core_reg_size, sizeof (regset)));
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nto_supply_fpregset ((char *) ®set);
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}
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}
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void
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nto_dummy_supply_regset (char *regs)
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{
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/* Do nothing. */
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}
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/* Register that we are able to handle ELF file formats using standard
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procfs "regset" structures. */
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static struct core_fns regset_core_fns = {
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bfd_target_elf_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_core_registers, /* core_read_registers */
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NULL /* next */
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};
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void
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_initialize_nto_tdep (void)
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{
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add_setshow_cmd ("nto-debug", class_maintenance, var_zinteger,
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&nto_internal_debugging, "Set QNX NTO internal debugging.\n\
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When non-zero, nto specific debug info is\n\
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displayed. Different information is displayed\n\
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for different positive values.", "Show QNX NTO internal debugging.\n",
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NULL, NULL, &setdebuglist, &showdebuglist);
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/* We use SIG45 for pulses, or something, so nostop, noprint
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and pass them. */
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signal_stop_update (target_signal_from_name ("SIG45"), 0);
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signal_print_update (target_signal_from_name ("SIG45"), 0);
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signal_pass_update (target_signal_from_name ("SIG45"), 1);
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/* By default we don't want to stop on these two, but we do want to pass. */
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#if defined(SIGSELECT)
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signal_stop_update (SIGSELECT, 0);
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signal_print_update (SIGSELECT, 0);
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signal_pass_update (SIGSELECT, 1);
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#endif
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#if defined(SIGPHOTON)
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signal_stop_update (SIGPHOTON, 0);
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signal_print_update (SIGPHOTON, 0);
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signal_pass_update (SIGPHOTON, 1);
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#endif
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/* Register core file support. */
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deprecated_add_core_fns (®set_core_fns);
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}
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