diff options
Diffstat (limited to 'gdb/nto-tdep.c')
| -rw-r--r-- | gdb/nto-tdep.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/gdb/nto-tdep.c b/gdb/nto-tdep.c new file mode 100644 index 0000000..abf63b9 --- /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 *) ®set, core_reg_sect, + min (core_reg_size, sizeof (regset))); + nto_supply_gregset ((char *) ®set); + } + else if (which == NTO_REG_FLOAT) + { + memcpy ((char *) ®set, core_reg_sect, + min (core_reg_size, sizeof (regset))); + nto_supply_fpregset ((char *) ®set); + } + else if (which == NTO_REG_ALT) + { + memcpy ((char *) ®set, core_reg_sect, + min (core_reg_size, sizeof (regset))); + nto_supply_altregset ((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 () +{ + 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 (®set_core_fns); +} |