123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117 |
- /* Target-dependent, architecture-independent code for DICOS, for GDB.
- Copyright (C) 2009-2022 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 "solib.h"
- #include "solib-target.h"
- #include "inferior.h"
- #include "dicos-tdep.h"
- #include "gdbarch.h"
- void
- dicos_init_abi (struct gdbarch *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
- need it on the stack. Rely on i386_gdbarch_init used also for
- amd64 to set up ON_STACK inferior calls. */
- /* 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 (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 = (asymbol **) 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;
- }
|