/* Target-dependent, architecture-independent code for DICOS, for GDB. Copyright (C) 2009-2012 Free Software Foundation, Inc. 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 3 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, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "osabi.h" #include "gdb_string.h" #include "solib.h" #include "solib-target.h" #include "inferior.h" #include "dicos-tdep.h" void dicos_init_abi (struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); set_solib_ops (gdbarch, &solib_target_so_ops); /* Every process, although has its own address space, sees the same list of shared libraries. There's no "main executable" in DICOS, so this accounts for all code. */ set_gdbarch_has_global_solist (gdbarch, 1); /* The DICOS breakpoint API takes care of magically making breakpoints visible to all inferiors. */ set_gdbarch_has_global_breakpoints (gdbarch, 1); /* There's no (standard definition of) entry point or a guaranteed text location with a symbol where to place the call dummy, so we put it on the stack. */ set_gdbarch_call_dummy_location (gdbarch, ON_STACK); /* DICOS rewinds the PC itself. */ set_gdbarch_decr_pc_after_break (gdbarch, 0); } /* Return true if ABFD is a dicos load module. HEADER_SIZE is the expected size of the "header" section in bytes. */ int dicos_load_module_p (bfd *abfd, int header_size) { long storage_needed; int ret = 0; asymbol **symbol_table = NULL; const char *symname = "Dicos_loadModuleInfo"; asection *section; /* DICOS files don't have a .note.ABI-tag marker or something similar. We do know there's always a "header" section of HEADER_SIZE bytes (size depends on architecture), and there's always a "Dicos_loadModuleInfo" symbol defined. Look for the section first, as that should be cheaper. */ section = bfd_get_section_by_name (abfd, "header"); if (!section) return 0; if (bfd_section_size (abfd, section) != header_size) return 0; /* Dicos LMs always have a "Dicos_loadModuleInfo" symbol defined. Look for it. */ storage_needed = bfd_get_symtab_upper_bound (abfd); if (storage_needed < 0) { warning (_("Can't read elf symbols from %s: %s"), bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); return 0; } if (storage_needed > 0) { long i, symcount; symbol_table = xmalloc (storage_needed); symcount = bfd_canonicalize_symtab (abfd, symbol_table); if (symcount < 0) warning (_("Can't read elf symbols from %s: %s"), bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); else { for (i = 0; i < symcount; i++) { asymbol *sym = symbol_table[i]; if (sym->name != NULL && symname[0] == sym->name[0] && strcmp (symname + 1, sym->name + 1) == 0) { ret = 1; break; } } } } xfree (symbol_table); return ret; }