657 lines
22 KiB
C
657 lines
22 KiB
C
/* BFD back-end for RISC iX (Acorn, arm) binaries.
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Copyright 1994, 1995, 1996, 1997, 1998, 2000, 2001
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Free Software Foundation, Inc.
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Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
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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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* RISC iX overloads the MAGIC field to indicate more than just the usual
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[ZNO]MAGIC values. Also included are squeezing information and
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shared library usage. */
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/* The following come from the man page. */
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#define SHLIBLEN 60
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#define MF_IMPURE 00200
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#define MF_SQUEEZED 01000
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#define MF_USES_SL 02000
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#define MF_IS_SL 04000
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/* Common combinations. */
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#define IMAGIC (MF_IMPURE|ZMAGIC) /* Demand load (impure text) */
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#define SPOMAGIC (MF_USES_SL|OMAGIC) /* OMAGIC with large header */
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/* -- may contain a ref to a */
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/* shared lib required by the */
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/* object. */
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#define SLOMAGIC (MF_IS_SL|OMAGIC) /* A reference to a shared library */
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/* The text portion of the object */
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/* contains "overflow text" from */
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/* the shared library to be linked */
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/* in with an object */
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#define QMAGIC (MF_SQUEEZED|ZMAGIC) /* Sqeezed demand paged. */
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/* NOTE: This interpretation of */
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/* QMAGIC seems to be at variance */
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/* With that used on other */
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/* architectures. */
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#define SPZMAGIC (MF_USES_SL|ZMAGIC) /* program which uses sl */
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#define SPQMAGIC (MF_USES_SL|QMAGIC) /* sqeezed ditto */
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#define SLZMAGIC (MF_IS_SL|ZMAGIC) /* shared lib part of prog */
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#define SLPZMAGIC (MF_USES_SL|SLZMAGIC) /* sl which uses another */
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#define N_SHARED_LIB(x) ((x).a_info & MF_USES_SL)
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/* Only a pure OMAGIC file has the minimal header */
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#define N_TXTOFF(x) \
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((x).a_info == OMAGIC ? 32 \
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: (N_MAGIC(x) == ZMAGIC) ? TARGET_PAGE_SIZE \
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: 999)
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#define N_TXTADDR(x) \
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(N_MAGIC(x) != ZMAGIC ? 0 /* object file or NMAGIC */ \
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/* Programs with shared libs are loaded at the first page after all the \
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text segments of the shared library programs. Without looking this \
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up we can't know exactly what the address will be. A reasonable guess \
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is that a_entry will be in the first page of the executable. */ \
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: N_SHARED_LIB(x) ? ((x).a_entry & ~(TARGET_PAGE_SIZE - 1)) \
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: TEXT_START_ADDR)
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#define N_SYMOFF(x) \
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(N_TXTOFF (x) + (x).a_text + (x).a_data + (x).a_trsize + (x).a_drsize)
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#define N_STROFF(x) (N_SYMOFF (x) + (x).a_syms)
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#define TEXT_START_ADDR 32768
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#define TARGET_PAGE_SIZE 32768
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#define SEGMENT_SIZE TARGET_PAGE_SIZE
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#define DEFAULT_ARCH bfd_arch_arm
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#define MY(OP) CAT(riscix_,OP)
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#define TARGETNAME "a.out-riscix"
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#define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \
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(((x).a_info & ~006000) != OMAGIC) && \
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((x).a_info != NMAGIC))
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#define N_MAGIC(x) ((x).a_info & ~07200)
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#define WRITE_HEADERS(abfd, execp) \
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{ \
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bfd_size_type text_size; /* dummy vars */ \
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file_ptr text_end; \
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if (adata(abfd).magic == undecided_magic) \
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NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \
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\
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execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \
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execp->a_entry = bfd_get_start_address (abfd); \
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\
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execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
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obj_reloc_entry_size (abfd)); \
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execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \
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obj_reloc_entry_size (abfd)); \
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NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \
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\
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if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) return false; \
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if (bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) \
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!= EXEC_BYTES_SIZE) \
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return false; \
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/* Now write out reloc info, followed by syms and strings */ \
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\
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if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \
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&& bfd_get_symcount (abfd) != 0) \
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{ \
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if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0) \
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return false; \
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\
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if (! NAME(aout,write_syms) (abfd)) return false; \
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\
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if (bfd_seek (abfd, (file_ptr) (N_TRELOFF(*execp)), SEEK_SET) != 0) \
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return false; \
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\
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if (! riscix_squirt_out_relocs (abfd, obj_textsec (abfd))) \
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return false; \
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if (bfd_seek (abfd, (file_ptr) (N_DRELOFF(*execp)), SEEK_SET) != 0) \
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return false; \
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\
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if (!NAME(aout,squirt_out_relocs) (abfd, obj_datasec (abfd))) \
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return false; \
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} \
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}
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#include "libaout.h"
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#include "aout/aout64.h"
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static bfd_reloc_status_type
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riscix_fix_pcrel_26_done PARAMS ((bfd *, arelent *, asymbol *, PTR,
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asection *, bfd *, char **));
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static bfd_reloc_status_type
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riscix_fix_pcrel_26 PARAMS ((bfd *, arelent *, asymbol *, PTR,
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asection *, bfd *, char **));
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static const bfd_target *
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MY (object_p) PARAMS ((bfd *));
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reloc_howto_type *
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riscix_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
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void
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riscix_swap_std_reloc_out PARAMS ((bfd *, arelent *, struct reloc_std_external *));
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boolean
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riscix_squirt_out_relocs PARAMS ((bfd *, asection *));
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long
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MY (canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
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const bfd_target *
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riscix_some_aout_object_p PARAMS ((bfd *, struct internal_exec *, const bfd_target *(*) (bfd *)));
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static reloc_howto_type riscix_std_reloc_howto[] = {
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/* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
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HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
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HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
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HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
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HOWTO( 3, 2, 3, 26, true, 0, complain_overflow_signed, riscix_fix_pcrel_26 , "ARM26", true, 0x00ffffff,0x00ffffff, false),
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HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, true),
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HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, true),
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HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, true),
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HOWTO( 7, 2, 3, 26, false, 0, complain_overflow_signed, riscix_fix_pcrel_26_done, "ARM26D",true,0x00ffffff,0x00ffffff, false),
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EMPTY_HOWTO (-1),
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HOWTO( 9, 0, -1, 16, false, 0, complain_overflow_bitfield,0,"NEG16", true, 0x0000ffff,0x0000ffff, false),
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HOWTO( 10, 0, -2, 32, false, 0, complain_overflow_bitfield,0,"NEG32", true, 0xffffffff,0xffffffff, false)
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};
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#define RISCIX_TABLE_SIZE \
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(sizeof (riscix_std_reloc_howto) / sizeof (reloc_howto_type))
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static bfd_reloc_status_type
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riscix_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section,
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output_bfd, error_message)
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *reloc_entry ATTRIBUTE_UNUSED;
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asymbol *symbol ATTRIBUTE_UNUSED;
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PTR data ATTRIBUTE_UNUSED;
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asection *input_section ATTRIBUTE_UNUSED;
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bfd *output_bfd ATTRIBUTE_UNUSED;
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char **error_message ATTRIBUTE_UNUSED;
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{
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/* This is dead simple at present. */
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_type
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riscix_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section,
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output_bfd, error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol;
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PTR data;
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asection *input_section;
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bfd *output_bfd;
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char **error_message ATTRIBUTE_UNUSED;
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{
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bfd_vma relocation;
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bfd_size_type addr = reloc_entry->address;
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long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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bfd_reloc_status_type flag = bfd_reloc_ok;
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/* If this is an undefined symbol, return error */
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if (symbol->section == &bfd_und_section
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&& (symbol->flags & BSF_WEAK) == 0)
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return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
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/* If the sections are different, and we are doing a partial relocation,
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just ignore it for now. */
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if (symbol->section->name != input_section->name
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&& output_bfd != (bfd *)NULL)
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return bfd_reloc_continue;
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relocation = (target & 0x00ffffff) << 2;
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relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */
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relocation += symbol->value;
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relocation += symbol->section->output_section->vma;
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relocation += symbol->section->output_offset;
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relocation += reloc_entry->addend;
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relocation -= input_section->output_section->vma;
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relocation -= input_section->output_offset;
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relocation -= addr;
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if (relocation & 3)
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return bfd_reloc_overflow;
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/* Check for overflow */
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if (relocation & 0x02000000)
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{
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if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff)
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flag = bfd_reloc_overflow;
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}
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else if (relocation & ~0x03ffffff)
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flag = bfd_reloc_overflow;
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target &= ~0x00ffffff;
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target |= (relocation >> 2) & 0x00ffffff;
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bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
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/* Now the ARM magic... Change the reloc type so that it is marked as done.
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Strictly this is only necessary if we are doing a partial relocation. */
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reloc_entry->howto = &riscix_std_reloc_howto[7];
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return flag;
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}
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reloc_howto_type *
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riscix_reloc_type_lookup (abfd, code)
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bfd *abfd;
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bfd_reloc_code_real_type code;
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{
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#define ASTD(i,j) case i: return &riscix_std_reloc_howto[j]
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if (code == BFD_RELOC_CTOR)
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switch (bfd_get_arch_info (abfd)->bits_per_address)
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{
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case 32:
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code = BFD_RELOC_32;
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break;
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default: return (reloc_howto_type *) NULL;
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}
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switch (code)
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{
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ASTD (BFD_RELOC_16, 1);
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ASTD (BFD_RELOC_32, 2);
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ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3);
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ASTD (BFD_RELOC_8_PCREL, 4);
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ASTD (BFD_RELOC_16_PCREL, 5);
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ASTD (BFD_RELOC_32_PCREL, 6);
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default: return (reloc_howto_type *) NULL;
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}
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}
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#define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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#define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols
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#define MY_final_link_callback should_not_be_used
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#define MY_bfd_final_link _bfd_generic_final_link
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#define MY_bfd_reloc_type_lookup riscix_reloc_type_lookup
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#define MY_canonicalize_reloc riscix_canonicalize_reloc
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#define MY_object_p riscix_object_p
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static const bfd_target *riscix_callback PARAMS ((bfd *));
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void
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riscix_swap_std_reloc_out (abfd, g, natptr)
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bfd *abfd;
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arelent *g;
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struct reloc_std_external *natptr;
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{
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int r_index;
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asymbol *sym = *(g->sym_ptr_ptr);
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int r_extern;
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int r_length;
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int r_pcrel;
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int r_neg = 0; /* Negative relocs use the BASEREL bit. */
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asection *output_section = sym->section->output_section;
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PUT_WORD(abfd, g->address, natptr->r_address);
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r_length = g->howto->size ; /* Size as a power of two */
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if (r_length < 0)
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{
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r_length = -r_length;
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r_neg = 1;
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}
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r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
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/* For RISC iX, in pc-relative relocs the r_pcrel bit means that the
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relocation has been done already (Only for the 26-bit one I think)???!!!
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*/
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if (r_length == 3)
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r_pcrel = r_pcrel ? 0 : 1;
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#if 0
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/* For a standard reloc, the addend is in the object file. */
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r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
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#endif
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/* name was clobbered by aout_write_syms to be symbol index */
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/* If this relocation is relative to a symbol then set the
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r_index to the symbols index, and the r_extern bit.
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Absolute symbols can come in in two ways, either as an offset
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from the abs section, or as a symbol which has an abs value.
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check for that here
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*/
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if (bfd_is_com_section (output_section)
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|| output_section == &bfd_abs_section
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|| output_section == &bfd_und_section)
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{
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if (bfd_abs_section.symbol == sym)
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{
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/* Whoops, looked like an abs symbol, but is really an offset
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from the abs section */
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r_index = 0;
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r_extern = 0;
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}
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else
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{
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/* Fill in symbol */
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r_extern = 1;
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r_index = (*g->sym_ptr_ptr)->udata.i;
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}
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}
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else
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{
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/* Just an ordinary section */
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r_extern = 0;
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r_index = output_section->target_index;
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}
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/* now the fun stuff */
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if (bfd_header_big_endian (abfd))
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{
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natptr->r_index[0] = r_index >> 16;
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natptr->r_index[1] = r_index >> 8;
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natptr->r_index[2] = r_index;
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natptr->r_type[0] =
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( (r_extern ? RELOC_STD_BITS_EXTERN_BIG: 0)
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| (r_pcrel ? RELOC_STD_BITS_PCREL_BIG: 0)
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| (r_neg ? RELOC_STD_BITS_BASEREL_BIG: 0)
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| (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
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}
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else
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{
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natptr->r_index[2] = r_index >> 16;
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natptr->r_index[1] = r_index >> 8;
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natptr->r_index[0] = r_index;
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natptr->r_type[0] =
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( (r_extern ? RELOC_STD_BITS_EXTERN_LITTLE: 0)
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| (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE: 0)
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| (r_neg ? RELOC_STD_BITS_BASEREL_LITTLE: 0)
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| (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
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}
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}
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boolean
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riscix_squirt_out_relocs (abfd, section)
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bfd *abfd;
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asection *section;
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{
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arelent **generic;
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unsigned char *native, *natptr;
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size_t each_size;
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unsigned int count = section->reloc_count;
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size_t natsize;
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if (count == 0) return true;
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each_size = obj_reloc_entry_size (abfd);
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natsize = each_size * count;
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native = (unsigned char *) bfd_zalloc (abfd, natsize);
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if (!native)
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return false;
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generic = section->orelocation;
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for (natptr = native;
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count != 0;
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--count, natptr += each_size, ++generic)
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riscix_swap_std_reloc_out (abfd, *generic,
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(struct reloc_std_external *) natptr);
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if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize)
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{
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bfd_release(abfd, native);
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return false;
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}
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bfd_release (abfd, native);
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return true;
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}
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/*
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* This is just like the standard aoutx.h version but we need to do our
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* own mapping of external reloc type values to howto entries.
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*/
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long
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MY(canonicalize_reloc) (abfd, section, relptr, symbols)
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bfd *abfd;
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sec_ptr section;
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arelent **relptr;
|
|
asymbol **symbols;
|
|
{
|
|
arelent *tblptr = section->relocation;
|
|
unsigned int count, c;
|
|
extern reloc_howto_type NAME(aout,std_howto_table)[];
|
|
|
|
/* If we have already read in the relocation table, return the values. */
|
|
if (section->flags & SEC_CONSTRUCTOR) {
|
|
arelent_chain *chain = section->constructor_chain;
|
|
|
|
for (count = 0; count < section->reloc_count; count++) {
|
|
*relptr++ = &chain->relent;
|
|
chain = chain->next;
|
|
}
|
|
*relptr = 0;
|
|
return section->reloc_count;
|
|
}
|
|
if (tblptr && section->reloc_count) {
|
|
for (count = 0; count++ < section->reloc_count;)
|
|
*relptr++ = tblptr++;
|
|
*relptr = 0;
|
|
return section->reloc_count;
|
|
}
|
|
|
|
if (!NAME(aout,slurp_reloc_table) (abfd, section, symbols))
|
|
return -1;
|
|
tblptr = section->relocation;
|
|
|
|
/* fix up howto entries */
|
|
for (count = 0; count++ < section->reloc_count;)
|
|
{
|
|
c = tblptr->howto - NAME(aout,std_howto_table);
|
|
BFD_ASSERT (c < RISCIX_TABLE_SIZE);
|
|
tblptr->howto = &riscix_std_reloc_howto[c];
|
|
|
|
*relptr++ = tblptr++;
|
|
}
|
|
*relptr = 0;
|
|
return section->reloc_count;
|
|
}
|
|
|
|
/* This is the same as NAME(aout,some_aout_object_p), but has different
|
|
expansions of the macro definitions. */
|
|
|
|
const bfd_target *
|
|
riscix_some_aout_object_p (abfd, execp, callback_to_real_object_p)
|
|
bfd *abfd;
|
|
struct internal_exec *execp;
|
|
const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
|
|
{
|
|
struct aout_data_struct *rawptr, *oldrawptr;
|
|
const bfd_target *result;
|
|
|
|
rawptr = ((struct aout_data_struct *)
|
|
bfd_zalloc (abfd, sizeof (struct aout_data_struct )));
|
|
|
|
if (rawptr == NULL)
|
|
return 0;
|
|
|
|
oldrawptr = abfd->tdata.aout_data;
|
|
abfd->tdata.aout_data = rawptr;
|
|
|
|
/* Copy the contents of the old tdata struct.
|
|
In particular, we want the subformat, since for hpux it was set in
|
|
hp300hpux.c:swap_exec_header_in and will be used in
|
|
hp300hpux.c:callback. */
|
|
if (oldrawptr != NULL)
|
|
*abfd->tdata.aout_data = *oldrawptr;
|
|
|
|
abfd->tdata.aout_data->a.hdr = &rawptr->e;
|
|
*(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec
|
|
struct */
|
|
execp = abfd->tdata.aout_data->a.hdr;
|
|
|
|
/* Set the file flags */
|
|
abfd->flags = BFD_NO_FLAGS;
|
|
if (execp->a_drsize || execp->a_trsize)
|
|
abfd->flags |= HAS_RELOC;
|
|
/* Setting of EXEC_P has been deferred to the bottom of this function */
|
|
if (execp->a_syms)
|
|
abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
|
|
if (N_DYNAMIC(*execp))
|
|
abfd->flags |= DYNAMIC;
|
|
|
|
if ((execp->a_info & MF_SQUEEZED) != 0) /* Squeezed files aren't supported
|
|
(yet)! */
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
else if ((execp->a_info & MF_IS_SL) != 0) /* Nor are shared libraries */
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
else if (N_MAGIC (*execp) == ZMAGIC)
|
|
{
|
|
abfd->flags |= D_PAGED | WP_TEXT;
|
|
adata (abfd).magic = z_magic;
|
|
}
|
|
else if (N_MAGIC (*execp) == NMAGIC)
|
|
{
|
|
abfd->flags |= WP_TEXT;
|
|
adata (abfd).magic = n_magic;
|
|
}
|
|
else if (N_MAGIC (*execp) == OMAGIC)
|
|
adata (abfd).magic = o_magic;
|
|
else
|
|
{
|
|
/* Should have been checked with N_BADMAG before this routine
|
|
was called. */
|
|
abort ();
|
|
}
|
|
|
|
bfd_get_start_address (abfd) = execp->a_entry;
|
|
|
|
obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
|
|
bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
|
|
|
|
/* The default relocation entry size is that of traditional V7 Unix. */
|
|
obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
|
|
|
|
/* The default symbol entry size is that of traditional Unix. */
|
|
obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
|
|
|
|
obj_aout_external_syms (abfd) = NULL;
|
|
obj_aout_external_strings (abfd) = NULL;
|
|
obj_aout_sym_hashes (abfd) = NULL;
|
|
|
|
if (! NAME(aout,make_sections) (abfd))
|
|
return NULL;
|
|
|
|
obj_datasec (abfd)->_raw_size = execp->a_data;
|
|
obj_bsssec (abfd)->_raw_size = execp->a_bss;
|
|
|
|
obj_textsec (abfd)->flags =
|
|
(execp->a_trsize != 0
|
|
? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
|
|
: (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
|
|
obj_datasec (abfd)->flags =
|
|
(execp->a_drsize != 0
|
|
? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
|
|
: (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
|
|
obj_bsssec (abfd)->flags = SEC_ALLOC;
|
|
|
|
result = (*callback_to_real_object_p) (abfd);
|
|
|
|
#if defined(MACH) || defined(STAT_FOR_EXEC)
|
|
/* The original heuristic doesn't work in some important cases. The
|
|
* a.out file has no information about the text start address. For
|
|
* files (like kernels) linked to non-standard addresses (ld -Ttext
|
|
* nnn) the entry point may not be between the default text start
|
|
* (obj_textsec(abfd)->vma) and (obj_textsec(abfd)->vma) + text size
|
|
* This is not just a mach issue. Many kernels are loaded at non
|
|
* standard addresses.
|
|
*/
|
|
{
|
|
struct stat stat_buf;
|
|
if (abfd->iostream != NULL
|
|
&& (abfd->flags & BFD_IN_MEMORY) == 0
|
|
&& (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
|
|
&& ((stat_buf.st_mode & 0111) != 0))
|
|
abfd->flags |= EXEC_P;
|
|
}
|
|
#else /* ! MACH */
|
|
/* Now that the segment addresses have been worked out, take a better
|
|
guess at whether the file is executable. If the entry point
|
|
is within the text segment, assume it is. (This makes files
|
|
executable even if their entry point address is 0, as long as
|
|
their text starts at zero.)
|
|
|
|
At some point we should probably break down and stat the file and
|
|
declare it executable if (one of) its 'x' bits are on... */
|
|
if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
|
|
(execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
|
|
abfd->flags |= EXEC_P;
|
|
#endif /* MACH */
|
|
if (result)
|
|
{
|
|
}
|
|
else
|
|
{
|
|
free (rawptr);
|
|
abfd->tdata.aout_data = oldrawptr;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static const bfd_target *
|
|
MY(object_p) (abfd)
|
|
bfd *abfd;
|
|
{
|
|
struct external_exec exec_bytes; /* Raw exec header from file */
|
|
struct internal_exec exec; /* Cleaned-up exec header */
|
|
const bfd_target *target;
|
|
|
|
if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
|
|
!= EXEC_BYTES_SIZE) {
|
|
if (bfd_get_error () != bfd_error_system_call)
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return 0;
|
|
}
|
|
|
|
exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
|
|
|
|
if (N_BADMAG (exec)) return 0;
|
|
#ifdef MACHTYPE_OK
|
|
if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0;
|
|
#endif
|
|
|
|
NAME(aout,swap_exec_header_in) (abfd, &exec_bytes, &exec);
|
|
|
|
target = riscix_some_aout_object_p (abfd, &exec, MY(callback));
|
|
|
|
return target;
|
|
}
|
|
|
|
#include "aout-target.h"
|