Make "show remote exec-file" inferior-aware

[deliverable/binutils-gdb.git] / bfd / i386msdos.c

diff --git a/bfd/i386msdos.c b/bfd/i386msdos.c
index 13a2c4f997bb7b6851e69f1a45743247f476ab53..11c5da6bed4068bb6beb09ca5c2a9851c16def68 100644 (file)
--- a/bfd/i386msdos.c
+++ b/bfd/i386msdos.c
@@ -1,6 +1,5 @@
 /* BFD back-end for MS-DOS executables.
 /* BFD back-end for MS-DOS executables.

-   Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
-   Free Software Foundation, Inc.
+   Copyright (C) 1990-2020 Free Software Foundation, Inc.

    Written by Bryan Ford of the University of Utah.
 
    Contributed by the Center for Software Science at the
    Written by Bryan Ford of the University of Utah.
 
    Contributed by the Center for Software Science at the


@@ -10,7 +9,7 @@
 
    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
 
    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 2 of the License, or
+   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,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -20,54 +19,111 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software

-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */

 
 
 
 

-#include "bfd.h"

 #include "sysdep.h"
 #include "sysdep.h"

+#include "bfd.h"

 #include "libbfd.h"
 #include "libaout.h"
 #include "libbfd.h"
 #include "libaout.h"

+#include "coff/msdos.h"

 
 

-#if 0
-struct exe_header
-{
-       unsigned short magic;
-       unsigned short bytes_in_last_page;
-       unsigned short npages;  /* number of 512-byte "pages" including this header */
-       unsigned short nrelocs;
-       unsigned short header_paras;    /* number of 16-byte paragraphs in header */
-       unsigned short reserved;
-       unsigned short load_switch;
-       unsigned short ss_ofs;
-       unsigned short sp;
-       unsigned short checksum;
-       unsigned short ip;
-       unsigned short cs_ofs;
-       unsigned short reloc_ofs;
-       unsigned short reserved2;
-       unsigned short something1;
-       unsigned short something2;
-       unsigned short something3;
-};
-#endif
-
-#define EXE_MAGIC      0x5a4d

 #define EXE_LOAD_HIGH  0x0000
 #define EXE_LOAD_LOW   0xffff
 #define EXE_PAGE_SIZE  512
 
 #define EXE_LOAD_HIGH  0x0000
 #define EXE_LOAD_LOW   0xffff
 #define EXE_PAGE_SIZE  512
 

+static bfd_boolean
+msdos_mkobject (bfd *abfd)
+{
+  bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i8086);
+
+  return aout_32_mkobject (abfd);
+}
+
+static const bfd_target *
+msdos_object_p (bfd *abfd)
+{
+  struct external_DOS_hdr hdr;
+  bfd_byte buffer[2];
+  asection *section;
+  unsigned int size;
+
+  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
+      || bfd_bread (&hdr, (bfd_size_type) sizeof (hdr), abfd) < DOS_HDR_SIZE)
+    {
+      if (bfd_get_error () != bfd_error_system_call)
+       bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  if (H_GET_16 (abfd, hdr.e_magic) != IMAGE_DOS_SIGNATURE)
+    {
+      bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  /* Check that this isn't actually a PE, NE, or LE file. If it is, the
+     e_lfanew field will be valid and point to a header beginning with one of
+     the relevant signatures.  If not, e_lfanew might point to anything, so
+     don't bail if we can't read there.  */
+  if (H_GET_16 (abfd, hdr.e_cparhdr) < 4
+      || bfd_seek (abfd, (file_ptr) H_GET_32 (abfd, hdr.e_lfanew), SEEK_SET) != 0
+      || bfd_bread (buffer, (bfd_size_type) 2, abfd) != 2)
+    {
+      if (bfd_get_error () == bfd_error_system_call)
+       return NULL;
+    }
+  else
+    {
+      if (H_GET_16 (abfd, buffer) == IMAGE_NT_SIGNATURE
+         || H_GET_16 (abfd, buffer) == IMAGE_OS2_SIGNATURE
+         || H_GET_16 (abfd, buffer) == IMAGE_OS2_SIGNATURE_LE
+         || H_GET_16 (abfd, buffer) == IMAGE_OS2_SIGNATURE_LX)
+       {
+         bfd_set_error (bfd_error_wrong_format);
+         return NULL;
+       }
+    }
+
+  if (!msdos_mkobject (abfd))
+    return NULL;
+
+  abfd->flags = EXEC_P;
+  abfd->start_address = H_GET_16 (abfd, hdr.e_ip);
+
+  section = bfd_make_section (abfd, ".text");
+  if (section == NULL)
+    return NULL;
+
+  section->flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS);
+  section->filepos = H_GET_16 (abfd, hdr.e_cparhdr) * 16;
+  size = (H_GET_16 (abfd, hdr.e_cp) - 1) * EXE_PAGE_SIZE - section->filepos;
+  size += H_GET_16 (abfd, hdr.e_cblp);
+
+  /* Check that the size is valid.  */
+  if (bfd_seek (abfd, (file_ptr) (section->filepos + size), SEEK_SET) != 0)
+    {
+      if (bfd_get_error () != bfd_error_system_call)
+       bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  bfd_set_section_size (section, size);
+  section->alignment_power = 4;
+
+  return abfd->xvec;
+}

 
 static int
 
 static int

-msdos_sizeof_headers (abfd, exec)
-     bfd *abfd ATTRIBUTE_UNUSED;
-     boolean exec ATTRIBUTE_UNUSED;
+msdos_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
+                     struct bfd_link_info *info ATTRIBUTE_UNUSED)

 {
   return 0;
 }
 
 {
   return 0;
 }
 

-static boolean
-msdos_write_object_contents (abfd)
-     bfd *abfd;
+static bfd_boolean
+msdos_write_object_contents (bfd *abfd)

 {
   static char hdr[EXE_PAGE_SIZE];
   file_ptr outfile_size = sizeof(hdr);
 {
   static char hdr[EXE_PAGE_SIZE];
   file_ptr outfile_size = sizeof(hdr);


@@ -77,20 +133,19 @@ msdos_write_object_contents (abfd)
   /* Find the total size of the program on disk and in memory.  */
   for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next)
     {
   /* Find the total size of the program on disk and in memory.  */
   for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next)
     {

-      if (bfd_get_section_size_before_reloc (sec) == 0)
-        continue;
-      if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
-        {
-         bfd_vma sec_vma = bfd_get_section_vma (abfd, sec)
-                           + bfd_get_section_size_before_reloc (sec);
+      if (sec->size == 0)
+       continue;
+      if (bfd_section_flags (sec) & SEC_ALLOC)
+       {
+         bfd_vma sec_vma = bfd_section_vma (sec) + sec->size;

          if (sec_vma > high_vma)
            high_vma = sec_vma;
        }
          if (sec_vma > high_vma)
            high_vma = sec_vma;
        }

-      if (bfd_get_section_flags (abfd, sec) & SEC_LOAD)
-        {
-         file_ptr sec_end = sizeof(hdr)
-                            + bfd_get_section_vma (abfd, sec)
-                            + bfd_get_section_size_before_reloc (sec);
+      if (bfd_section_flags (sec) & SEC_LOAD)
+       {
+         file_ptr sec_end = (sizeof (hdr)
+                             + bfd_section_vma (sec)
+                             + sec->size);

          if (sec_end > outfile_size)
            outfile_size = sec_end;
        }
          if (sec_end > outfile_size)
            outfile_size = sec_end;
        }


@@ -100,65 +155,63 @@ msdos_write_object_contents (abfd)
   if (high_vma > (bfd_vma)0xffff)
     {
       bfd_set_error(bfd_error_file_too_big);
   if (high_vma > (bfd_vma)0xffff)
     {
       bfd_set_error(bfd_error_file_too_big);

-      return false;
+      return FALSE;

     }
 
     }
 

-  /* constants */
-  bfd_h_put_16(abfd, EXE_MAGIC, &hdr[0]);
-  bfd_h_put_16(abfd, EXE_PAGE_SIZE / 16, &hdr[8]);
-  bfd_h_put_16(abfd, EXE_LOAD_LOW, &hdr[12]);
-  bfd_h_put_16(abfd, 0x3e, &hdr[24]);
-  bfd_h_put_16(abfd, 0x0001, &hdr[28]); /* XXX??? */
-  bfd_h_put_16(abfd, 0x30fb, &hdr[30]); /* XXX??? */
-  bfd_h_put_16(abfd, 0x726a, &hdr[32]); /* XXX??? */
+  /* Constants.  */
+  H_PUT_16 (abfd, IMAGE_DOS_SIGNATURE, &hdr[0]);
+  H_PUT_16 (abfd, EXE_PAGE_SIZE / 16, &hdr[8]);
+  H_PUT_16 (abfd, EXE_LOAD_LOW, &hdr[12]);
+  H_PUT_16 (abfd, 0x3e, &hdr[24]);
+  H_PUT_16 (abfd, 0x0001, &hdr[28]); /* XXX??? */
+  H_PUT_16 (abfd, 0x30fb, &hdr[30]); /* XXX??? */
+  H_PUT_16 (abfd, 0x726a, &hdr[32]); /* XXX??? */

 
 

-  /* bytes in last page (0 = full page) */
-  bfd_h_put_16(abfd, outfile_size & (EXE_PAGE_SIZE - 1), &hdr[2]);
+  /* Bytes in last page (0 = full page).  */
+  H_PUT_16 (abfd, outfile_size & (EXE_PAGE_SIZE - 1), &hdr[2]);

 
 

-  /* number of pages */
-  bfd_h_put_16(abfd, (outfile_size + EXE_PAGE_SIZE - 1) / EXE_PAGE_SIZE,
-              &hdr[4]);
+  /* Number of pages.  */
+  H_PUT_16 (abfd, (outfile_size + EXE_PAGE_SIZE - 1) / EXE_PAGE_SIZE, &hdr[4]);

 
   /* Set the initial stack pointer to the end of the bss.
      The program's crt0 code must relocate it to a real stack.  */
 
   /* Set the initial stack pointer to the end of the bss.
      The program's crt0 code must relocate it to a real stack.  */

-  bfd_h_put_16(abfd, high_vma, &hdr[16]);
+  H_PUT_16 (abfd, high_vma, &hdr[16]);

 
   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
 
   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0

-      || bfd_write (hdr, 1, sizeof(hdr), abfd) != sizeof(hdr))
-    return false;
+      || bfd_bwrite (hdr, (bfd_size_type) sizeof(hdr), abfd) != sizeof(hdr))
+    return FALSE;

 
 

-  return true;
+  return TRUE;

 }
 
 }
 

-static boolean
-msdos_set_section_contents (abfd, section, location, offset, count)
-     bfd *abfd;
-     sec_ptr section;
-     PTR location;
-     file_ptr offset;
-     bfd_size_type count;
+static bfd_boolean
+msdos_set_section_contents (bfd *abfd,
+                           sec_ptr section,
+                           const void *location,
+                           file_ptr offset,
+                           bfd_size_type count)

 {
 
   if (count == 0)
 {
 
   if (count == 0)

-    return true;
+    return TRUE;

 
 

-  section->filepos = EXE_PAGE_SIZE + bfd_get_section_vma (abfd, section);
+  section->filepos = EXE_PAGE_SIZE + bfd_section_vma (section);

 
 

-  if (bfd_get_section_flags (abfd, section) & SEC_LOAD)
+  if (bfd_section_flags (section) & SEC_LOAD)

     {
     {

-      if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0
-          || bfd_write (location, 1, count, abfd) != count)
-        return false;
+      if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
+         || bfd_bwrite (location, count, abfd) != count)
+       return FALSE;

     }
 
     }
 

-  return true;
+  return TRUE;

 }
 
 
 
 }
 
 
 

-#define msdos_mkobject aout_32_mkobject

 #define msdos_make_empty_symbol aout_32_make_empty_symbol
 #define msdos_bfd_reloc_type_lookup aout_32_reloc_type_lookup
 #define msdos_make_empty_symbol aout_32_make_empty_symbol
 #define msdos_bfd_reloc_type_lookup aout_32_reloc_type_lookup

+#define msdos_bfd_reloc_name_lookup aout_32_reloc_name_lookup

 
 #define        msdos_close_and_cleanup _bfd_generic_close_and_cleanup
 #define msdos_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
 
 #define        msdos_close_and_cleanup _bfd_generic_close_and_cleanup
 #define msdos_bfd_free_cached_info _bfd_generic_bfd_free_cached_info


@@ -170,76 +223,99 @@ msdos_set_section_contents (abfd, section, location, offset, count)
   bfd_generic_get_relocated_section_contents
 #define msdos_bfd_relax_section bfd_generic_relax_section
 #define msdos_bfd_gc_sections bfd_generic_gc_sections
   bfd_generic_get_relocated_section_contents
 #define msdos_bfd_relax_section bfd_generic_relax_section
 #define msdos_bfd_gc_sections bfd_generic_gc_sections

+#define msdos_bfd_lookup_section_flags bfd_generic_lookup_section_flags
+#define msdos_bfd_merge_sections bfd_generic_merge_sections
+#define msdos_bfd_is_group_section bfd_generic_is_group_section
+#define msdos_bfd_group_name bfd_generic_group_name
+#define msdos_bfd_discard_group bfd_generic_discard_group
+#define msdos_section_already_linked \
+  _bfd_generic_section_already_linked
+#define msdos_bfd_define_common_symbol bfd_generic_define_common_symbol
+#define msdos_bfd_link_hide_symbol _bfd_generic_link_hide_symbol
+#define msdos_bfd_define_start_stop bfd_generic_define_start_stop

 #define msdos_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
 #define msdos_bfd_link_add_symbols _bfd_generic_link_add_symbols
 #define msdos_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
 #define msdos_bfd_link_add_symbols _bfd_generic_link_add_symbols

+#define msdos_bfd_link_just_syms _bfd_generic_link_just_syms
+#define msdos_bfd_copy_link_hash_symbol_type \
+  _bfd_generic_copy_link_hash_symbol_type

 #define msdos_bfd_final_link _bfd_generic_final_link
 #define msdos_bfd_link_split_section _bfd_generic_link_split_section
 #define msdos_set_arch_mach _bfd_generic_set_arch_mach
 #define msdos_bfd_final_link _bfd_generic_final_link
 #define msdos_bfd_link_split_section _bfd_generic_link_split_section
 #define msdos_set_arch_mach _bfd_generic_set_arch_mach

+#define msdos_bfd_link_check_relocs _bfd_generic_link_check_relocs

 
 #define msdos_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
 
 #define msdos_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound

-#define msdos_get_symtab _bfd_nosymbols_get_symtab
+#define msdos_canonicalize_symtab _bfd_nosymbols_canonicalize_symtab

 #define msdos_print_symbol _bfd_nosymbols_print_symbol
 #define msdos_get_symbol_info _bfd_nosymbols_get_symbol_info
 #define msdos_print_symbol _bfd_nosymbols_print_symbol
 #define msdos_get_symbol_info _bfd_nosymbols_get_symbol_info

+#define msdos_get_symbol_version_string \
+  _bfd_nosymbols_get_symbol_version_string

 #define msdos_find_nearest_line _bfd_nosymbols_find_nearest_line
 #define msdos_find_nearest_line _bfd_nosymbols_find_nearest_line

+#define msdos_find_line _bfd_nosymbols_find_line
+#define msdos_find_inliner_info _bfd_nosymbols_find_inliner_info

 #define msdos_get_lineno _bfd_nosymbols_get_lineno
 #define msdos_get_lineno _bfd_nosymbols_get_lineno

+#define msdos_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false

 #define msdos_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
 #define msdos_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 #define msdos_read_minisymbols _bfd_nosymbols_read_minisymbols
 #define msdos_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 
 #define msdos_canonicalize_reloc _bfd_norelocs_canonicalize_reloc
 #define msdos_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
 #define msdos_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 #define msdos_read_minisymbols _bfd_nosymbols_read_minisymbols
 #define msdos_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 
 #define msdos_canonicalize_reloc _bfd_norelocs_canonicalize_reloc

+#define msdos_set_reloc _bfd_norelocs_set_reloc

 #define msdos_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound
 #define msdos_32_bfd_link_split_section  _bfd_generic_link_split_section
 
 #define msdos_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound
 #define msdos_32_bfd_link_split_section  _bfd_generic_link_split_section
 

-const bfd_target i386msdos_vec =
-{
-  "msdos",                     /* name */
-  bfd_target_msdos_flavour,
-  BFD_ENDIAN_LITTLE,           /* target byte order */
-  BFD_ENDIAN_LITTLE,           /* target headers byte order */
-  (EXEC_P),                    /* object flags */
-  (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS
-   | SEC_ALLOC | SEC_LOAD),    /* section flags */
-  0,                           /* leading underscore */
-  ' ',                         /* ar_pad_char */
-  16,                          /* ar_max_namelen */
-  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
-  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
-  bfd_getl16, bfd_getl_signed_16, bfd_putl16,  /* data */
-  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
-  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
-  bfd_getl16, bfd_getl_signed_16, bfd_putl16,  /* hdrs */
-
+const bfd_target i386_msdos_vec =

   {
   {

-    _bfd_dummy_target,
-    _bfd_dummy_target,         /* bfd_check_format */
-    _bfd_dummy_target,
-    _bfd_dummy_target,
-  },
-  {
-    bfd_false,
-    msdos_mkobject,
-    _bfd_generic_mkarchive,
-    bfd_false,
-  },
-  {                            /* bfd_write_contents */
-    bfd_false,
-    msdos_write_object_contents,
-    _bfd_write_archive_contents,
-    bfd_false,
-  },
-
-  BFD_JUMP_TABLE_GENERIC (msdos),
-  BFD_JUMP_TABLE_COPY (_bfd_generic),
-  BFD_JUMP_TABLE_CORE (_bfd_nocore),
-  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
-  BFD_JUMP_TABLE_SYMBOLS (msdos),
-  BFD_JUMP_TABLE_RELOCS (msdos),
-  BFD_JUMP_TABLE_WRITE (msdos),
-  BFD_JUMP_TABLE_LINK (msdos),
-  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
-
-  (PTR) 0
-};
+    "msdos",                   /* name */
+    bfd_target_msdos_flavour,
+    BFD_ENDIAN_LITTLE,         /* target byte order */
+    BFD_ENDIAN_LITTLE,         /* target headers byte order */
+    (EXEC_P),                  /* object flags */
+    (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS
+     | SEC_ALLOC | SEC_LOAD),  /* section flags */
+    0,                         /* leading underscore */
+    ' ',                               /* ar_pad_char */
+    16,                                /* ar_max_namelen */
+    0,                         /* match priority.  */
+    bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+    bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+    bfd_getl16, bfd_getl_signed_16, bfd_putl16,        /* data */
+    bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+    bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+    bfd_getl16, bfd_getl_signed_16, bfd_putl16,        /* hdrs */
+
+    {
+      _bfd_dummy_target,
+      msdos_object_p,          /* bfd_check_format */
+      _bfd_dummy_target,
+      _bfd_dummy_target,
+    },
+    {
+      _bfd_bool_bfd_false_error,
+      msdos_mkobject,
+      _bfd_generic_mkarchive,
+      _bfd_bool_bfd_false_error,
+    },
+    {                          /* bfd_write_contents */
+      _bfd_bool_bfd_false_error,
+      msdos_write_object_contents,
+      _bfd_write_archive_contents,
+      _bfd_bool_bfd_false_error,
+    },
+
+    BFD_JUMP_TABLE_GENERIC (msdos),
+    BFD_JUMP_TABLE_COPY (_bfd_generic),
+    BFD_JUMP_TABLE_CORE (_bfd_nocore),
+    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
+    BFD_JUMP_TABLE_SYMBOLS (msdos),
+    BFD_JUMP_TABLE_RELOCS (msdos),
+    BFD_JUMP_TABLE_WRITE (msdos),
+    BFD_JUMP_TABLE_LINK (msdos),
+    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+    NULL,
+
+    NULL
+  };