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2043ddb218
The testcase managed to trigger creation of a wild pointer in coff_slurp_symbol_table. Stop that happening, and fix an unrelated problem I happened to see in bfd_coff_get_syment. * coff-bfd.c (bfd_coff_get_syment): Clear fix_value after converting n_value from a pointer to an index. * coffcode.h (coff_slurp_symbol_table <C_BSTAT>): Sanity check symbol value before converting to a pointer.
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/* BFD COFF interfaces used outside of BFD.
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Copyright (C) 1990-2023 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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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, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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/* Return the COFF syment for a symbol. */
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bool
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bfd_coff_get_syment (bfd *abfd,
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asymbol *symbol,
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struct internal_syment *psyment)
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{
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coff_symbol_type *csym;
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csym = coff_symbol_from (symbol);
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if (csym == NULL || csym->native == NULL
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|| ! csym->native->is_sym)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return false;
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}
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*psyment = csym->native->u.syment;
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if (csym->native->fix_value)
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{
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psyment->n_value =
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((psyment->n_value - (uintptr_t) obj_raw_syments (abfd))
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/ sizeof (combined_entry_type));
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csym->native->fix_value = 0;
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}
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/* FIXME: We should handle fix_line here. */
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return true;
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}
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/* Return the COFF auxent for a symbol. */
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bool
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bfd_coff_get_auxent (bfd *abfd,
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asymbol *symbol,
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int indx,
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union internal_auxent *pauxent)
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{
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coff_symbol_type *csym;
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combined_entry_type *ent;
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csym = coff_symbol_from (symbol);
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if (csym == NULL
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|| csym->native == NULL
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|| ! csym->native->is_sym
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|| indx >= csym->native->u.syment.n_numaux)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return false;
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}
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ent = csym->native + indx + 1;
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BFD_ASSERT (! ent->is_sym);
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*pauxent = ent->u.auxent;
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if (ent->fix_tag)
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{
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pauxent->x_sym.x_tagndx.u32 =
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((combined_entry_type *) pauxent->x_sym.x_tagndx.p
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- obj_raw_syments (abfd));
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ent->fix_tag = 0;
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}
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if (ent->fix_end)
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{
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pauxent->x_sym.x_fcnary.x_fcn.x_endndx.u32 =
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((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p
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- obj_raw_syments (abfd));
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ent->fix_end = 0;
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}
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if (ent->fix_scnlen)
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{
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pauxent->x_csect.x_scnlen.u64 =
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((combined_entry_type *) pauxent->x_csect.x_scnlen.p
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- obj_raw_syments (abfd));
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ent->fix_scnlen = 0;
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}
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return true;
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}
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