diff options
Diffstat (limited to 'bfd/coff-stgo32.c')
-rw-r--r-- | bfd/coff-stgo32.c | 421 |
1 files changed, 0 insertions, 421 deletions
diff --git a/bfd/coff-stgo32.c b/bfd/coff-stgo32.c deleted file mode 100644 index 9fb9d37cae4..00000000000 --- a/bfd/coff-stgo32.c +++ /dev/null @@ -1,421 +0,0 @@ -/* BFD back-end for Intel 386 COFF files (DJGPP variant with a stub). - Copyright 1997, 1998, 1999, 2000, 2001 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 - (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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 } - -#include "bfd.h" - -/* At first the prototypes */ - -static void -adjust_filehdr_in_post PARAMS ((bfd * abfd, PTR src, PTR dst)); -static void -adjust_filehdr_out_pre PARAMS ((bfd * abfd, PTR in, PTR out)); -static void -adjust_filehdr_out_post PARAMS ((bfd * abfd, PTR in, PTR out)); - -static void -adjust_scnhdr_in_post PARAMS ((bfd * abfd, PTR ext, PTR in)); -static void -adjust_scnhdr_out_pre PARAMS ((bfd * abfd, PTR in, PTR out)); -static void -adjust_scnhdr_out_post PARAMS ((bfd * abfd, PTR in, PTR out)); - -static void -adjust_aux_in_post PARAMS ((bfd * abfd, PTR ext1, int type, int class, int indx, - int numaux, PTR in1)); -static void -adjust_aux_out_pre PARAMS ((bfd * abfd, PTR inp, int type, int class, int indx, - int numaux, PTR extp)); -static void -adjust_aux_out_post PARAMS ((bfd * abfd, PTR inp, int type, int class, int indx, - int numaux, PTR extp)); - -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. - */ - -#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 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 - -/* 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))) - -/* These bytes are a 2048-byte DOS executable, which loads the COFF - image into memory and then runs it. It is called 'stub' */ - -static unsigned char stub_bytes[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 - ...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 (abfd, src, dst) - bfd *abfd; - PTR src; - PTR 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); - - /* 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); -} - -static void -adjust_filehdr_out_pre (abfd, in, out) - bfd *abfd; - PTR in; - PTR 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 (bfd_coff_go32stub (abfd) != NULL) - memcpy (filehdr_out->stub, bfd_coff_go32stub (abfd), STUBSIZE); - else - /* use the default */ - memcpy (filehdr_out->stub, stub_bytes, STUBSIZE); - - ADJUST_VAL (filehdr_in->f_symptr, -STUBSIZE); -} - -static void -adjust_filehdr_out_post (abfd, in, out) - bfd *abfd ATTRIBUTE_UNUSED; - PTR in; - PTR out ATTRIBUTE_UNUSED; -{ - struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in; - /* undo the above change */ - ADJUST_VAL (filehdr_in->f_symptr, STUBSIZE); -} - -static void -adjust_scnhdr_in_post (abfd, ext, in) - bfd *abfd ATTRIBUTE_UNUSED; - PTR ext ATTRIBUTE_UNUSED; - PTR 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); -} - -static void -adjust_scnhdr_out_pre (abfd, in, out) - bfd *abfd ATTRIBUTE_UNUSED; - PTR in; - PTR 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); -} - -static void -adjust_scnhdr_out_post (abfd, in, out) - bfd *abfd ATTRIBUTE_UNUSED; - PTR in; - PTR 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); -} - -static void -adjust_aux_in_post (abfd, ext1, type, class, indx, numaux, in1) - bfd *abfd ATTRIBUTE_UNUSED; - PTR ext1 ATTRIBUTE_UNUSED; - int type; - int class; - int indx ATTRIBUTE_UNUSED; - int numaux ATTRIBUTE_UNUSED; - PTR in1; -{ - union internal_auxent *in = (union internal_auxent *) in1; - - if (class == C_BLOCK || class == C_FCN || ISFCN (type) || ISTAG (class)) - { - ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, STUBSIZE); - } -} - -static void -adjust_aux_out_pre (abfd, inp, type, class, indx, numaux, extp) - bfd *abfd ATTRIBUTE_UNUSED; - PTR inp; - int type; - int class; - int indx ATTRIBUTE_UNUSED; - int numaux ATTRIBUTE_UNUSED; - PTR extp ATTRIBUTE_UNUSED; -{ - union internal_auxent *in = (union internal_auxent *) inp; - - if (class == C_BLOCK || class == C_FCN || ISFCN (type) || ISTAG (class)) - { - ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, -STUBSIZE); - } -} - -static void -adjust_aux_out_post (abfd, inp, type, class, indx, numaux, extp) - bfd *abfd ATTRIBUTE_UNUSED; - PTR inp; - int type; - int class; - int indx ATTRIBUTE_UNUSED; - int numaux ATTRIBUTE_UNUSED; - PTR extp ATTRIBUTE_UNUSED; -{ - union internal_auxent *in = (union internal_auxent *) inp; - - if (class == C_BLOCK || class == C_FCN || ISFCN (type) || ISTAG (class)) - { - ADJUST_VAL (in->x_sym.x_fcnary.x_fcn.x_lnnoptr, 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 (abfd) - bfd *abfd; -{ - /* Do it only once */ - if (bfd_coff_go32stub (abfd) == NULL) - { - char *stub; - struct stat st; - int f; - unsigned char header[10]; - char magic[8]; - unsigned long coff_start, 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 ((unsigned 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 (memcmp (magic, "go32stub", 8) != 0) - { - 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) - { - close (f); - return; - } - lseek (f, 0L, SEEK_SET); - if ((unsigned long) read (f, bfd_coff_go32stub (abfd), coff_start) - != coff_start) - { - bfd_release (abfd, bfd_coff_go32stub (abfd)); - bfd_coff_go32stub (abfd) = NULL; - } - close (f); - } -stub_end: - /* There was something wrong above, so use now the standard builtin - stub */ - if (bfd_coff_go32stub (abfd) == 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); - } -} - -/* If ibfd was a stubbed coff image, copy the stub from that bfd - to the new obfd. - */ - -static boolean -go32_stubbed_coff_bfd_copy_private_bfd_data (ibfd, obfd) - bfd *ibfd; - bfd *obfd; -{ - /* check if both are the same targets */ - if (ibfd->xvec != obfd->xvec) - return true; - - /* check if both have a valid stub */ - if (bfd_coff_go32stub (ibfd) == NULL - || bfd_coff_go32stub (obfd) == NULL) - return true; - - /* Now copy the stub */ - memcpy (bfd_coff_go32stub (obfd), bfd_coff_go32stub (ibfd), STUBSIZE); - - return true; -} |