-/* BFD back-end for Intel 386 COFF files (go32 variant with a stub).
- Copyright 1997, 1998 Free Software Foundation, Inc.
+/* BFD back-end for Intel 386 COFF files (DJGPP variant with a stub).
+ Copyright (C) 1997-2019 Free Software Foundation, Inc.
Written by Robert Hoehne.
This file is part of BFD, the Binary File Descriptor library.
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,
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. */
/* This file handles now also stubbed coff images. The stub is a small
DOS executable program before the coff image to load it in memory
image and NOT in the file.
To be compatible with any existing executables I have fixed this
- here and NOT in the DJGPP startup code.
- */
+ here and NOT in the DJGPP startup code. */
-#define TARGET_SYM go32stubbedcoff_vec
+#define TARGET_SYM i386_coff_go32stubbed_vec
#define TARGET_NAME "coff-go32-exe"
#define TARGET_UNDERSCORE '_'
#define COFF_GO32_EXE
-
+#define COFF_LONG_SECTION_NAMES
+#define COFF_SUPPORT_GNU_LINKONCE
+#define COFF_LONG_FILENAMES
+
+#define COFF_SECTION_ALIGNMENT_ENTRIES \
+{ COFF_SECTION_NAME_EXACT_MATCH (".data"), \
+ COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
+{ COFF_SECTION_NAME_EXACT_MATCH (".text"), \
+ COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
+{ COFF_SECTION_NAME_PARTIAL_MATCH (".debug"), \
+ COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \
+{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.wi"), \
+ COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }
+
+#include "sysdep.h"
#include "bfd.h"
-/* At first the prototypes */
+/* All that ..._PRE and ...POST functions are called from the corresponding
+ coff_swap... functions. The ...PRE functions are called at the beginning
+ of the function and the ...POST functions at the end of the swap routines. */
static void
-adjust_filehdr_in_post PARAMS ((bfd * abfd, PTR src, PTR dst));
+adjust_filehdr_in_post (bfd *, void *, void *);
static void
-adjust_filehdr_out_pre PARAMS ((bfd * abfd, PTR in, PTR out));
+adjust_filehdr_out_pre (bfd *, void *, void *);
static void
-adjust_filehdr_out_post PARAMS ((bfd * abfd, PTR in, PTR out));
-
+adjust_filehdr_out_post (bfd *, void *, void *);
static void
-adjust_scnhdr_in_post PARAMS ((bfd * abfd, PTR ext, PTR in));
+adjust_scnhdr_in_post (bfd *, void *, void *);
static void
-adjust_scnhdr_out_pre PARAMS ((bfd * abfd, PTR in, PTR out));
+adjust_scnhdr_out_pre (bfd *, void *, void *);
static void
-adjust_scnhdr_out_post PARAMS ((bfd * abfd, PTR in, PTR out));
-
+adjust_scnhdr_out_post (bfd *, void *, void *);
static void
-adjust_aux_in_post PARAMS ((bfd * abfd, PTR ext1, int type, int class, int indx,
- int numaux, PTR in1));
+adjust_aux_in_post (bfd *, void *, int, int, int, int, void *);
static void
-adjust_aux_out_pre PARAMS ((bfd * abfd, PTR inp, int type, int class, int indx,
- int numaux, PTR extp));
+adjust_aux_out_pre (bfd *, void *, int, int, int, int, void *);
static void
-adjust_aux_out_post PARAMS ((bfd * abfd, PTR inp, int type, int class, int indx,
- int numaux, PTR extp));
-
+adjust_aux_out_post (bfd *, void *, int, int, int, int, void *);
static void
-create_go32_stub PARAMS ((bfd * abfd));
-
-/*
- All that ..._PRE and ...POST functions are called from the corresponding
- coff_swap... functions. The ...PRE functions are called at the beginning
- of the function and the ...POST functions at the end of the swap routines.
- */
+create_go32_stub (bfd *);
#define COFF_ADJUST_FILEHDR_IN_POST adjust_filehdr_in_post
#define COFF_ADJUST_FILEHDR_OUT_PRE adjust_filehdr_out_pre
#define COFF_ADJUST_AUX_OUT_PRE adjust_aux_out_pre
#define COFF_ADJUST_AUX_OUT_POST adjust_aux_out_post
-static boolean
- go32_stubbed_coff_bfd_copy_private_bfd_data PARAMS ((bfd * ibfd, bfd * obfd));
-
-#define coff_bfd_copy_private_bfd_data go32_stubbed_coff_bfd_copy_private_bfd_data
-
-#include "coff-i386.c"
-
-/* I hold in the usrdata the stub */
-#define bfd_coff_go32stub bfd_usrdata
+static const bfd_target *go32_check_format (bfd *);
-/* This macro is used, because I cannot assume the endianess of the
- host system */
-#define _H(index) (bfd_h_get_16(abfd, (bfd_byte *)(header+index*2)))
+#define COFF_CHECK_FORMAT go32_check_format
-/* This function checks if the bfd is a stubbed coff image */
-static const bfd_target *
-go32_stubbed_coff_object_p (abfd)
- bfd *abfd;
-{
- unsigned char header[10];
- char magic[8];
- unsigned long coff_start, exe_start;
+static bfd_boolean
+ go32_stubbed_coff_bfd_copy_private_bfd_data (bfd *, bfd *);
- if (bfd_read (&header, 1, sizeof (header), abfd) != sizeof (header))
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_wrong_format);
- return 0;
- }
- if (_H (0) != 0x5a4d) /* it is not an exe file. maybe a coff-image */
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_wrong_format);
- return 0;
- }
- coff_start = (long) _H (2) * 512L;
- if (_H (1))
- coff_start += (long) _H (1) - 512L;
+#define coff_bfd_copy_private_bfd_data go32_stubbed_coff_bfd_copy_private_bfd_data
- /* We can handle only a stub with a length of STUBSIZE */
- if (coff_start != STUBSIZE)
- {
- bfd_set_error (bfd_error_wrong_format);
- return 0;
- }
- exe_start = _H (4) * 16;
- if (bfd_seek (abfd, exe_start, SEEK_SET) != 0)
- return 0;
- if (bfd_read (&magic, 1, 8, abfd) != 8)
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_wrong_format);
- return 0;
- }
- if (memcmp (magic, "go32stub", 8) != 0)
- {
- bfd_set_error (bfd_error_wrong_format);
- return 0;
- }
- if (bfd_seek (abfd, 0, SEEK_SET) != 0)
- return 0;
+#include "coff-i386.c"
- /* Call the normal COFF detection routine */
- return coff_object_p (abfd);
-}
+/* This macro is used, because I cannot assume the endianness of the
+ host system. */
+#define _H(index) (H_GET_16 (abfd, (header + index * 2)))
/* These bytes are a 2048-byte DOS executable, which loads the COFF
- image into memory and then runs it. It is called 'stub' */
+ image into memory and then runs it. It is called 'stub'. */
-static unsigned char stub_bytes[STUBSIZE] =
+static const unsigned char stub_bytes[GO32_STUBSIZE] =
{
#include "go32stub.h"
};
/*
I have not commented each swap function below, because the
technique is in any function the same. For the ...in function,
- all the pointers are adjusted by adding STUBSIZE and for the
+ all the pointers are adjusted by adding GO32_STUBSIZE and for the
...out function, it is subtracted first and after calling the
- standard swap function it is reset to the old value */
+ standard swap function it is reset to the old value. */
/* This macro is used for adjusting the filepointers, which
- is done only, if the pointer is nonzero */
+ is done only, if the pointer is nonzero. */
#define ADJUST_VAL(val,diff) \
if (val != 0) val += diff
static void
-adjust_filehdr_in_post (abfd, src, dst)
- bfd *abfd;
- PTR src;
- PTR dst;
+adjust_filehdr_in_post (bfd * abfd ATTRIBUTE_UNUSED,
+ void * src,
+ void * dst)
{
FILHDR *filehdr_src = (FILHDR *) src;
struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;
- ADJUST_VAL (filehdr_dst->f_symptr, STUBSIZE);
-
- /* Save now the stub to be used later */
- bfd_coff_go32stub (abfd) = (PTR) bfd_alloc (abfd, STUBSIZE);
+ ADJUST_VAL (filehdr_dst->f_symptr, GO32_STUBSIZE);
- /* Since this function returns no status, I do not set here
- any bfd_error_...
- That means, before the use of bfd_coff_go32stub (), this value
- should be checked if it is != NULL */
- if (bfd_coff_go32stub (abfd) == NULL)
- return;
- memcpy (bfd_coff_go32stub (abfd), filehdr_src->stub, STUBSIZE);
+ /* Save now the stub to be used later. Put the stub data to FILEHDR_DST
+ first as coff_data (abfd) still does not exist. It may not even be ever
+ created as we are just checking the file format of ABFD. */
+ memcpy (filehdr_dst->go32stub, filehdr_src->stub, GO32_STUBSIZE);
+ filehdr_dst->f_flags |= F_GO32STUB;
}
static void
-adjust_filehdr_out_pre (abfd, in, out)
- bfd *abfd;
- PTR in;
- PTR out;
+adjust_filehdr_out_pre (bfd * abfd, void * in, void * out)
{
struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in;
FILHDR *filehdr_out = (FILHDR *) out;
- /* Generate the stub */
+ /* Generate the stub. */
create_go32_stub (abfd);
- /* Copy the stub to the file header */
- if (bfd_coff_go32stub (abfd) != NULL)
- memcpy (filehdr_out->stub, bfd_coff_go32stub (abfd), STUBSIZE);
+ /* Copy the stub to the file header. */
+ if (coff_data (abfd)->go32stub != NULL)
+ memcpy (filehdr_out->stub, coff_data (abfd)->go32stub, GO32_STUBSIZE);
else
- /* use the default */
- memcpy (filehdr_out->stub, stub_bytes, STUBSIZE);
+ /* Use the default. */
+ memcpy (filehdr_out->stub, stub_bytes, GO32_STUBSIZE);
- ADJUST_VAL (filehdr_in->f_symptr, -STUBSIZE);
+ ADJUST_VAL (filehdr_in->f_symptr, -GO32_STUBSIZE);
}
static void
-adjust_filehdr_out_post (abfd, in, out)
- bfd *abfd;
- PTR in;
- PTR out;
+adjust_filehdr_out_post (bfd * abfd ATTRIBUTE_UNUSED,
+ void * in,
+ void * out ATTRIBUTE_UNUSED)
{
struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in;
- /* undo the above change */
- ADJUST_VAL (filehdr_in->f_symptr, STUBSIZE);
+ /* Undo the above change. */
+ ADJUST_VAL (filehdr_in->f_symptr, GO32_STUBSIZE);
}
static void
-adjust_scnhdr_in_post (abfd, ext, in)
- bfd *abfd;
- PTR ext;
- PTR in;
+adjust_scnhdr_in_post (bfd * abfd ATTRIBUTE_UNUSED,
+ void * ext ATTRIBUTE_UNUSED,
+ void * in)
{
struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
- ADJUST_VAL (scnhdr_int->s_scnptr, STUBSIZE);
- ADJUST_VAL (scnhdr_int->s_relptr, STUBSIZE);
- ADJUST_VAL (scnhdr_int->s_lnnoptr, STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_scnptr, GO32_STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_relptr, GO32_STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_lnnoptr, GO32_STUBSIZE);
}
static void
-adjust_scnhdr_out_pre (abfd, in, out)
- bfd *abfd;
- PTR in;
- PTR out;
+adjust_scnhdr_out_pre (bfd * abfd ATTRIBUTE_UNUSED,
+ void * in,
+ void * out ATTRIBUTE_UNUSED)
{
struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
- ADJUST_VAL (scnhdr_int->s_scnptr, -STUBSIZE);
- ADJUST_VAL (scnhdr_int->s_relptr, -STUBSIZE);
- ADJUST_VAL (scnhdr_int->s_lnnoptr, -STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_scnptr, -GO32_STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_relptr, -GO32_STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_lnnoptr, -GO32_STUBSIZE);
}
static void
-adjust_scnhdr_out_post (abfd, in, out)
- bfd *abfd;
- PTR in;
- PTR out;
+adjust_scnhdr_out_post (bfd * abfd ATTRIBUTE_UNUSED,
+ void * in,
+ void * out ATTRIBUTE_UNUSED)
{
struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
- ADJUST_VAL (scnhdr_int->s_scnptr, STUBSIZE);
- ADJUST_VAL (scnhdr_int->s_relptr, STUBSIZE);
- ADJUST_VAL (scnhdr_int->s_lnnoptr, STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_scnptr, GO32_STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_relptr, GO32_STUBSIZE);
+ ADJUST_VAL (scnhdr_int->s_lnnoptr, GO32_STUBSIZE);
}
static void
-adjust_aux_in_post (abfd, ext1, type, class, indx, numaux, in1)
- bfd *abfd;
- PTR ext1;
- int type;
- int class;
- int indx;
- int numaux;
- PTR in1;
+adjust_aux_in_post (bfd * abfd ATTRIBUTE_UNUSED,
+ void * ext1 ATTRIBUTE_UNUSED,
+ int type,
+ int in_class,
+ int indx ATTRIBUTE_UNUSED,
+ int numaux ATTRIBUTE_UNUSED,
+ void * in1)
{
union internal_auxent *in = (union internal_auxent *) in1;
- if (class == C_BLOCK || class == C_FCN || ISFCN (type) || ISTAG (class))
+ if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
+ || ISTAG (in_class))
{
- ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, STUBSIZE);
+ ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, GO32_STUBSIZE);
}
}
static void
-adjust_aux_out_pre (abfd, inp, type, class, indx, numaux, extp)
- bfd *abfd;
- PTR inp;
- int type;
- int class;
- int indx;
- int numaux;
- PTR extp;
+adjust_aux_out_pre (bfd *abfd ATTRIBUTE_UNUSED,
+ void * inp,
+ int type,
+ int in_class,
+ int indx ATTRIBUTE_UNUSED,
+ int numaux ATTRIBUTE_UNUSED,
+ void * extp ATTRIBUTE_UNUSED)
{
union internal_auxent *in = (union internal_auxent *) inp;
- if (class == C_BLOCK || class == C_FCN || ISFCN (type) || ISTAG (class))
+ if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
+ || ISTAG (in_class))
{
- ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, -STUBSIZE);
+ ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, -GO32_STUBSIZE);
}
}
static void
-adjust_aux_out_post (abfd, inp, type, class, indx, numaux, extp)
- bfd *abfd;
- PTR inp;
- int type;
- int class;
- int indx;
- int numaux;
- PTR extp;
+adjust_aux_out_post (bfd *abfd ATTRIBUTE_UNUSED,
+ void * inp,
+ int type,
+ int in_class,
+ int indx ATTRIBUTE_UNUSED,
+ int numaux ATTRIBUTE_UNUSED,
+ void * extp ATTRIBUTE_UNUSED)
{
union internal_auxent *in = (union internal_auxent *) inp;
- if (class == C_BLOCK || class == C_FCN || ISFCN (type) || ISTAG (class))
+ if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
+ || ISTAG (in_class))
{
- ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, STUBSIZE);
+ ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, GO32_STUBSIZE);
}
}
-/*
- That's the function, which creates the stub. There are
+/* That's the function, which creates the stub. There are
different cases from where the stub is taken.
At first the environment variable $(GO32STUB) is checked and then
$(STUB) if it was not set.
file.
If there was any error, the standard stub (compiled in this file)
- is taken.
- */
+ is taken. */
static void
-create_go32_stub (abfd)
- bfd *abfd;
+create_go32_stub (bfd *abfd)
{
- /* Do it only once */
- if (bfd_coff_go32stub (abfd) == NULL)
+ /* Do it only once. */
+ if (coff_data (abfd)->go32stub == NULL)
{
char *stub;
struct stat st;
int f;
unsigned char header[10];
char magic[8];
- unsigned long coff_start, exe_start;
+ unsigned long coff_start;
+ long exe_start;
- /* Check at first the environment variable $(GO32STUB) */
+ /* Check at first the environment variable $(GO32STUB). */
stub = getenv ("GO32STUB");
- /* Now check the environment variable $(STUB) */
+ /* Now check the environment variable $(STUB). */
if (stub == NULL)
stub = getenv ("STUB");
if (stub == NULL)
close (f);
goto stub_end;
}
- if (_H (0) != 0x5a4d) /* it is not an exe file */
+ if (_H (0) != 0x5a4d) /* It is not an exe file. */
{
close (f);
goto stub_end;
}
/* Compute the size of the stub (it is every thing up
- to the beginning of the coff image) */
+ to the beginning of the coff image). */
coff_start = (long) _H (2) * 512L;
if (_H (1))
coff_start += (long) _H (1) - 512L;
/* Currently there is only a fixed stub size of 2048 bytes
- supported */
+ supported. */
if (coff_start != 2048)
{
close (f);
goto stub_end;
}
exe_start = _H (4) * 16;
- if ((unsigned long) lseek (f, exe_start, SEEK_SET) != exe_start)
+ if ((long) lseek (f, exe_start, SEEK_SET) != exe_start)
{
close (f);
goto stub_end;
close (f);
goto stub_end;
}
- if (memcmp (magic, "go32stub", 8) != 0)
+ if (! CONST_STRNEQ (magic, "go32stub"))
{
close (f);
goto stub_end;
}
- /* Now we found a correct stub (hopefully) */
- bfd_coff_go32stub (abfd) = (PTR) bfd_alloc (abfd, coff_start);
- if (bfd_coff_go32stub (abfd) == NULL)
+ /* Now we found a correct stub (hopefully). */
+ coff_data (abfd)->go32stub = bfd_alloc (abfd, (bfd_size_type) coff_start);
+ if (coff_data (abfd)->go32stub == NULL)
{
close (f);
return;
}
lseek (f, 0L, SEEK_SET);
- if ((unsigned long) read (f, bfd_coff_go32stub (abfd), coff_start)
+ if ((unsigned long) read (f, coff_data (abfd)->go32stub, coff_start)
!= coff_start)
{
- bfd_release (abfd, bfd_coff_go32stub (abfd));
- bfd_coff_go32stub (abfd) = NULL;
+ bfd_release (abfd, coff_data (abfd)->go32stub);
+ coff_data (abfd)->go32stub = NULL;
}
close (f);
}
stub_end:
/* There was something wrong above, so use now the standard builtin
- stub */
- if (bfd_coff_go32stub (abfd) == NULL)
+ stub. */
+ if (coff_data (abfd)->go32stub == NULL)
{
- bfd_coff_go32stub (abfd) = (PTR) bfd_alloc (abfd, STUBSIZE);
- if (bfd_coff_go32stub (abfd) == NULL)
- {
- return;
- }
-
- memcpy (bfd_coff_go32stub (abfd), stub_bytes, STUBSIZE);
+ coff_data (abfd)->go32stub
+ = bfd_alloc (abfd, (bfd_size_type) GO32_STUBSIZE);
+ if (coff_data (abfd)->go32stub == NULL)
+ return;
+ memcpy (coff_data (abfd)->go32stub, stub_bytes, GO32_STUBSIZE);
}
}
/* If ibfd was a stubbed coff image, copy the stub from that bfd
- to the new obfd.
- */
+ to the new obfd. */
-static boolean
-go32_stubbed_coff_bfd_copy_private_bfd_data (ibfd, obfd)
- bfd *ibfd;
- bfd *obfd;
+static bfd_boolean
+go32_stubbed_coff_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
{
- /* check if both are the same targets */
+ /* Check if both are the same targets. */
if (ibfd->xvec != obfd->xvec)
- return true;
+ return TRUE;
+
+ /* Check if we have a source stub. */
+ if (coff_data (ibfd)->go32stub == NULL)
+ return TRUE;
- /* check if both have a valid stub */
- if (bfd_coff_go32stub (ibfd) == NULL
- || bfd_coff_go32stub (obfd) == NULL)
- return true;
+ /* As adjust_filehdr_out_pre may get called only after this function,
+ optionally allocate the output stub. */
+ if (coff_data (obfd)->go32stub == NULL)
+ coff_data (obfd)->go32stub = bfd_alloc (obfd,
+ (bfd_size_type) GO32_STUBSIZE);
- /* Now copy the stub */
- memcpy (bfd_coff_go32stub (obfd), bfd_coff_go32stub (ibfd), STUBSIZE);
+ /* Now copy the stub. */
+ if (coff_data (obfd)->go32stub != NULL)
+ memcpy (coff_data (obfd)->go32stub, coff_data (ibfd)->go32stub,
+ GO32_STUBSIZE);
- return true;
+ return TRUE;
+}
+
+/* coff_object_p only checks 2 bytes F_MAGIC at GO32_STUBSIZE inside the file
+ which is too fragile. */
+
+static const bfd_target *
+go32_check_format (bfd *abfd)
+{
+ char mz[2];
+
+ if (bfd_bread (mz, 2, abfd) != 2 || mz[0] != 'M' || mz[1] != 'Z')
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ if (bfd_seek (abfd, 0, SEEK_SET) != 0)
+ return NULL;
+
+ return coff_object_p (abfd);
}