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118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/* Target-dependent, architecture-independent code for DICOS, for GDB.
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Copyright (C) 2009-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "osabi.h"
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#include "solib.h"
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#include "solib-target.h"
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#include "inferior.h"
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#include "dicos-tdep.h"
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#include "gdbarch.h"
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void
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dicos_init_abi (struct gdbarch *gdbarch)
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{
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set_solib_ops (gdbarch, &solib_target_so_ops);
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/* Every process, although has its own address space, sees the same
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list of shared libraries. There's no "main executable" in DICOS,
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so this accounts for all code. */
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set_gdbarch_has_global_solist (gdbarch, 1);
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/* The DICOS breakpoint API takes care of magically making
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breakpoints visible to all inferiors. */
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set_gdbarch_has_global_breakpoints (gdbarch, 1);
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/* There's no (standard definition of) entry point or a guaranteed
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text location with a symbol where to place the call dummy, so we
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need it on the stack. Rely on i386_gdbarch_init used also for
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amd64 to set up ON_STACK inferior calls. */
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/* DICOS rewinds the PC itself. */
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set_gdbarch_decr_pc_after_break (gdbarch, 0);
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}
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/* Return true if ABFD is a dicos load module. HEADER_SIZE is the
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expected size of the "header" section in bytes. */
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int
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dicos_load_module_p (bfd *abfd, int header_size)
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{
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long storage_needed;
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int ret = 0;
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asymbol **symbol_table = NULL;
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const char *symname = "Dicos_loadModuleInfo";
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asection *section;
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/* DICOS files don't have a .note.ABI-tag marker or something
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similar. We do know there's always a "header" section of
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HEADER_SIZE bytes (size depends on architecture), and there's
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always a "Dicos_loadModuleInfo" symbol defined. Look for the
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section first, as that should be cheaper. */
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section = bfd_get_section_by_name (abfd, "header");
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if (!section)
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return 0;
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if (bfd_section_size (section) != header_size)
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return 0;
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/* Dicos LMs always have a "Dicos_loadModuleInfo" symbol
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defined. Look for it. */
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storage_needed = bfd_get_symtab_upper_bound (abfd);
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if (storage_needed < 0)
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{
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warning (_("Can't read elf symbols from %s: %s"),
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bfd_get_filename (abfd),
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bfd_errmsg (bfd_get_error ()));
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return 0;
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}
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if (storage_needed > 0)
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{
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long i, symcount;
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symbol_table = (asymbol **) xmalloc (storage_needed);
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symcount = bfd_canonicalize_symtab (abfd, symbol_table);
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if (symcount < 0)
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warning (_("Can't read elf symbols from %s: %s"),
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bfd_get_filename (abfd),
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bfd_errmsg (bfd_get_error ()));
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else
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{
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for (i = 0; i < symcount; i++)
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{
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asymbol *sym = symbol_table[i];
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if (sym->name != NULL
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&& symname[0] == sym->name[0]
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&& strcmp (symname + 1, sym->name + 1) == 0)
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{
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ret = 1;
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break;
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}
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}
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}
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}
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xfree (symbol_table);
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return ret;
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}
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