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authorKris Warkentin <kewarken@qnx.com>2003-05-05 13:57:21 +0000
committerKris Warkentin <kewarken@qnx.com>2003-05-05 13:57:21 +0000
commit1b883d351364d8b9e00021462e06d5dba0d61460 (patch)
tree9ca4ee44cac1d6add99277a098a96b202c37a676 /gdb/nto-tdep.c
parent4bc6e03a51b7b718a385253d4b7e9fb9ab213880 (diff)
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Added i386 QNX Neutrino support.
Diffstat (limited to 'gdb/nto-tdep.c')
-rw-r--r--gdb/nto-tdep.c341
1 files changed, 341 insertions, 0 deletions
diff --git a/gdb/nto-tdep.c b/gdb/nto-tdep.c
new file mode 100644
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--- /dev/null
+++ b/gdb/nto-tdep.c
@@ -0,0 +1,341 @@
+/* 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);
+}