diff options
Diffstat (limited to 'binutils-2.24/bfd/coff-stgo32.c')
| -rw-r--r-- | binutils-2.24/bfd/coff-stgo32.c | 425 |
1 files changed, 0 insertions, 425 deletions
diff --git a/binutils-2.24/bfd/coff-stgo32.c b/binutils-2.24/bfd/coff-stgo32.c deleted file mode 100644 index 882ddd2f..00000000 --- a/binutils-2.24/bfd/coff-stgo32.c +++ /dev/null @@ -1,425 +0,0 @@ -/* BFD back-end for Intel 386 COFF files (DJGPP variant with a stub). - Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2005, 2006, 2007, 2009, - 2011, 2012 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 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - 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., 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 - and execute it. This is needed, because DOS cannot run coff files. - - All the functions below are called by the corresponding functions - from coffswap.h. - The only thing what they do is to adjust the information stored in - the COFF file which are offset into the file. - This is needed, because DJGPP uses a very special way to load and run - the coff image. It loads the image in memory and assumes then, that the - image had no stub by using the filepointers as pointers in the coff - 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. */ - -#define TARGET_SYM go32stubbedcoff_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" - -/* 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 (bfd *, void *, void *); -static void -adjust_filehdr_out_pre (bfd *, void *, void *); -static void -adjust_filehdr_out_post (bfd *, void *, void *); -static void -adjust_scnhdr_in_post (bfd *, void *, void *); -static void -adjust_scnhdr_out_pre (bfd *, void *, void *); -static void -adjust_scnhdr_out_post (bfd *, void *, void *); -static void -adjust_aux_in_post (bfd *, void *, int, int, int, int, void *); -static void -adjust_aux_out_pre (bfd *, void *, int, int, int, int, void *); -static void -adjust_aux_out_post (bfd *, void *, int, int, int, int, void *); -static void -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_FILEHDR_OUT_POST adjust_filehdr_out_post - -#define COFF_ADJUST_SCNHDR_IN_POST adjust_scnhdr_in_post -#define COFF_ADJUST_SCNHDR_OUT_PRE adjust_scnhdr_out_pre -#define COFF_ADJUST_SCNHDR_OUT_POST adjust_scnhdr_out_post - -#define COFF_ADJUST_AUX_IN_POST adjust_aux_in_post -#define COFF_ADJUST_AUX_OUT_PRE adjust_aux_out_pre -#define COFF_ADJUST_AUX_OUT_POST adjust_aux_out_post - -static const bfd_target *go32_check_format (bfd *); - -#define COFF_CHECK_FORMAT go32_check_format - -static bfd_boolean - go32_stubbed_coff_bfd_copy_private_bfd_data (bfd *, bfd *); - -#define coff_bfd_copy_private_bfd_data go32_stubbed_coff_bfd_copy_private_bfd_data - -#include "coff-i386.c" - -/* 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'. */ - -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 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. */ - -/* This macro is used for adjusting the filepointers, which - is done only, if the pointer is nonzero. */ - -#define ADJUST_VAL(val,diff) \ - if (val != 0) val += diff - -static void -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, GO32_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 (bfd * abfd, void * in, void * out) -{ - struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in; - FILHDR *filehdr_out = (FILHDR *) out; - - /* Generate the stub. */ - create_go32_stub (abfd); - - /* 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, GO32_STUBSIZE); - - ADJUST_VAL (filehdr_in->f_symptr, -GO32_STUBSIZE); -} - -static void -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, GO32_STUBSIZE); -} - -static void -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, GO32_STUBSIZE); - ADJUST_VAL (scnhdr_int->s_relptr, GO32_STUBSIZE); - ADJUST_VAL (scnhdr_int->s_lnnoptr, GO32_STUBSIZE); -} - -static void -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, -GO32_STUBSIZE); - ADJUST_VAL (scnhdr_int->s_relptr, -GO32_STUBSIZE); - ADJUST_VAL (scnhdr_int->s_lnnoptr, -GO32_STUBSIZE); -} - -static void -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, GO32_STUBSIZE); - ADJUST_VAL (scnhdr_int->s_relptr, GO32_STUBSIZE); - ADJUST_VAL (scnhdr_int->s_lnnoptr, GO32_STUBSIZE); -} - -static void -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 (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type) - || ISTAG (in_class)) - { - ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, GO32_STUBSIZE); - } -} - -static void -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 (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type) - || ISTAG (in_class)) - { - ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, -GO32_STUBSIZE); - } -} - -static void -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 (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type) - || ISTAG (in_class)) - { - ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, GO32_STUBSIZE); - } -} - -/* 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. - If it exists and points to a valid stub the stub is taken from - that file. This file can be also a whole executable file, because - the stub is computed from the exe information at the start of that - file. - - If there was any error, the standard stub (compiled in this file) - is taken. */ - -static void -create_go32_stub (bfd *abfd) -{ - /* 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; - long exe_start; - - /* Check at first the environment variable $(GO32STUB). */ - stub = getenv ("GO32STUB"); - /* Now check the environment variable $(STUB). */ - if (stub == NULL) - stub = getenv ("STUB"); - if (stub == NULL) - goto stub_end; - if (stat (stub, &st) != 0) - goto stub_end; -#ifdef O_BINARY - f = open (stub, O_RDONLY | O_BINARY); -#else - f = open (stub, O_RDONLY); -#endif - if (f < 0) - goto stub_end; - if (read (f, &header, sizeof (header)) < 0) - { - close (f); - goto stub_end; - } - 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). */ - 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. */ - if (coff_start != 2048) - { - close (f); - goto stub_end; - } - exe_start = _H (4) * 16; - if ((long) lseek (f, exe_start, SEEK_SET) != exe_start) - { - close (f); - goto stub_end; - } - if (read (f, &magic, 8) != 8) - { - close (f); - goto stub_end; - } - if (! CONST_STRNEQ (magic, "go32stub")) - { - close (f); - goto stub_end; - } - /* 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, coff_data (abfd)->go32stub, coff_start) - != coff_start) - { - 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 (coff_data (abfd)->go32stub == NULL) - { - 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. */ - -static bfd_boolean -go32_stubbed_coff_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) -{ - /* Check if both are the same targets. */ - if (ibfd->xvec != obfd->xvec) - return TRUE; - - /* Check if we have a source stub. */ - if (coff_data (ibfd)->go32stub == 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. */ - if (coff_data (obfd)->go32stub != NULL) - memcpy (coff_data (obfd)->go32stub, coff_data (ibfd)->go32stub, - GO32_STUBSIZE); - - 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); -} |