| /* 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. */ |
| deprecated_add_core_fns (®set_core_fns); |
| } |