X-Git-Url: https://repo.jachan.dev/binutils.git/blobdiff_plain/fc7233808a1d88db99a5181e1ee0f6865f8f5206..7b107b1ec4228ecc51f0ad9b38626d2b4cd04075:/bfd/opncls.c diff --git a/bfd/opncls.c b/bfd/opncls.c index 9b91c2fbe9..3acc1fd844 100644 --- a/bfd/opncls.c +++ b/bfd/opncls.c @@ -1,71 +1,53 @@ -/* opncls.c -- open and close a bfd. */ +/* opncls.c -- open and close a BFD. + Copyright (C) 1990-1991 Free Software Foundation, Inc. + Written by Cygnus Support. -/* Copyright (C) 1990, 1991 Free Software Foundation, Inc. +This file is part of BFD, the Binary File Descriptor library. -This file is part of BFD, the Binary File Diddler. - -BFD is free software; you can redistribute it and/or modify +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 1, or (at your option) -any later version. +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. -BFD is distributed in the hope that it will be useful, +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 BFD; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* $Id$ */ -#include "sysdep.h" #include "bfd.h" +#include "sysdep.h" #include "libbfd.h" - +#include "obstack.h" extern void bfd_cache_init(); FILE *bfd_open_file(); /* fdopen is a loser -- we should use stdio exclusively. Unfortunately if we do that we can't use fcntl. */ - -/** Locking - Locking is loosely controlled by the preprocessor variable - BFD_LOCKS. I say loosely because Unix barely understands locking - -- at least in BSD it doesn't affect programs which don't - explicitly use it! That is to say it's practically useless, though - if everyone uses this library you'll be OK. - From among the many and varied lock facilities available, (none of - which, of course, knows about any other) we use the fcntl locks, - because they're Posix. - - The reason that bfd_openr and bfd_fdopenr exist, yet only bfd_openw - exists is because of locking. When we do output, we lock the - filename file for output, then open a temporary file which does not - actually get its correct filename until closing time. This is - safest, but requires the asymmetry in read and write entry points. - - Perhaps, since unix has so many different kinds of locking anyway, - we should use the emacs lock scheme?... */ - -#define obstack_chunk_alloc malloc +#define obstack_chunk_alloc bfd_xmalloc #define obstack_chunk_free free /* Return a new BFD. All BFD's are allocated through this routine. */ bfd *new_bfd() { - struct obstack tmp; bfd *nbfd; - obstack_begin(&tmp,128); - - nbfd = (bfd *)obstack_alloc(&tmp,sizeof(bfd)); - memset((PTR)nbfd, 0, sizeof (bfd)); /* Clear it */ - nbfd->memory = tmp; + nbfd = (bfd *)zalloc (sizeof (bfd)); + if (!nbfd) + return 0; + + bfd_check_init(); + obstack_begin((PTR)&nbfd->memory, 128); + + nbfd->arch_info = &bfd_default_arch_struct; nbfd->direction = no_direction; nbfd->iostream = NULL; @@ -81,7 +63,9 @@ bfd *new_bfd() nbfd->sections = (asection *)NULL; nbfd->cacheable = false; nbfd->flags = NO_FLAGS; - nbfd->mtime_set = 0; + nbfd->mtime_set = false; + + return nbfd; } @@ -94,11 +78,30 @@ bfd *obfd; nbfd->xvec = obfd->xvec; nbfd->my_archive = obfd; nbfd->direction = read_direction; + nbfd->target_defaulted = obfd->target_defaulted; return nbfd; } -/** bfd_openr, bfd_fdopenr -- open for reading. - Returns a pointer to a freshly-allocated bfd on success, or NULL. */ +/* +SECTION + Opening and Closing BFDs + +*/ + +/* +FUNCTION + bfd_openr + +SYNOPSIS + bfd *bfd_openr(CONST char *filename, CONST char*target); + +DESCRIPTION + This function opens the file supplied (using <>) with the target + supplied, it returns a pointer to the created BFD. + + If NULL is returned then an error has occured. Possible errors + are <>, <> or <> error. +*/ bfd * DEFUN(bfd_openr, (filename, target), @@ -108,21 +111,19 @@ DEFUN(bfd_openr, (filename, target), bfd *nbfd; bfd_target *target_vec; - target_vec = bfd_find_target (target); - if (target_vec == NULL) { - bfd_error = invalid_target; - return NULL; - } - - bfd_error = system_call_error; nbfd = new_bfd(); if (nbfd == NULL) { bfd_error = no_memory; return NULL; } + target_vec = bfd_find_target (target, nbfd); + if (target_vec == NULL) { + bfd_error = invalid_target; + return NULL; + } + nbfd->filename = filename; - nbfd->xvec = target_vec; nbfd->direction = read_direction; if (bfd_open_file (nbfd) == NULL) { @@ -142,6 +143,21 @@ DEFUN(bfd_openr, (filename, target), close it if anything goes wrong. Closing the stream means closing the file descriptor too, even though we didn't open it. */ +/* +FUNCTION + bfd_fdopenr + +SYNOPSIS + bfd *bfd_fdopenr(CONST char *filename, CONST char *target, int fd); + +DESCRIPTION + bfd_fdopenr is to bfd_fopenr much like fdopen is to fopen. + It opens a BFD on a file already described by the @var{fd} + supplied. + + Possible errors are no_memory, invalid_target and system_call + error. +*/ bfd * DEFUN(bfd_fdopenr,(filename, target, fd), @@ -152,25 +168,15 @@ DEFUN(bfd_fdopenr,(filename, target, fd), bfd *nbfd; bfd_target *target_vec; int fdflags; -#ifdef BFD_LOCKS - struct flock lock, *lockp = &lock; -#endif - - target_vec = bfd_find_target (target); - if (target_vec == NULL) { - bfd_error = invalid_target; - return NULL; - } bfd_error = system_call_error; - fdflags = fcntl (fd, F_GETFL); - if (fdflags == -1) return NULL; - -#ifdef BFD_LOCKS - lockp->l_type = F_RDLCK; - if (fcntl (fd, F_SETLKW, lockp) == -1) return NULL; +#ifdef NO_FCNTL + fdflags = O_RDWR; /* Assume full access */ +#else + fdflags = fcntl (fd, F_GETFL, NULL); #endif + if (fdflags == -1) return NULL; nbfd = new_bfd(); @@ -178,11 +184,19 @@ DEFUN(bfd_fdopenr,(filename, target, fd), bfd_error = no_memory; return NULL; } -#ifdef BFD_LOCKS - nbfd->lock = (struct flock *) (nbfd + 1); -#endif + + target_vec = bfd_find_target (target, nbfd); + if (target_vec == NULL) { + bfd_error = invalid_target; + return NULL; + } + +#ifdef FASCIST_FDOPEN + nbfd->iostream = (char *) fdopen (fd, FOPEN_RB); +#else /* if the fd were open for read only, this still would not hurt: */ - nbfd->iostream = (char *) fdopen (fd, "r+"); + nbfd->iostream = (char *) fdopen (fd, FOPEN_RUB); +#endif if (nbfd->iostream == NULL) { (void) obstack_free (&nbfd->memory, (PTR)0); return NULL; @@ -191,32 +205,43 @@ DEFUN(bfd_fdopenr,(filename, target, fd), /* OK, put everything where it belongs */ nbfd->filename = filename; - nbfd->xvec = target_vec; /* As a special case we allow a FD open for read/write to be written through, although doing so requires that we end the previous clause with a preposition. */ - switch (fdflags & O_ACCMODE) { + /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ + switch (fdflags & (O_ACCMODE)) { case O_RDONLY: nbfd->direction = read_direction; break; case O_WRONLY: nbfd->direction = write_direction; break; case O_RDWR: nbfd->direction = both_direction; break; default: abort (); } -#ifdef BFD_LOCKS - memcpy (nbfd->lock, lockp, sizeof (struct flock)) -#endif - - bfd_cache_init (nbfd); + bfd_cache_init (nbfd); return nbfd; } /** bfd_openw -- open for writing. - Returns a pointer to a freshly-allocated bfd on success, or NULL. + Returns a pointer to a freshly-allocated BFD on success, or NULL. See comment by bfd_fdopenr before you try to modify this function. */ +/* +FUNCTION + bfd_openw + +SYNOPSIS + bfd *bfd_openw(CONST char *filename, CONST char *target); + +DESCRIPTION + Creates a BFD, associated with file @var{filename}, using the + file format @var{target}, and returns a pointer to it. + + Possible errors are system_call_error, no_memory, + invalid_target. +*/ + bfd * DEFUN(bfd_openw,(filename, target), CONST char *filename AND @@ -225,9 +250,6 @@ DEFUN(bfd_openw,(filename, target), bfd *nbfd; bfd_target *target_vec; - target_vec = bfd_find_target (target); - if (target_vec == NULL) return NULL; - bfd_error = system_call_error; /* nbfd has to point to head of malloc'ed block so that bfd_close may @@ -239,8 +261,10 @@ DEFUN(bfd_openw,(filename, target), return NULL; } + target_vec = bfd_find_target (target, nbfd); + if (target_vec == NULL) return NULL; + nbfd->filename = filename; - nbfd->xvec = target_vec; nbfd->direction = write_direction; if (bfd_open_file (nbfd) == NULL) { @@ -251,34 +275,163 @@ DEFUN(bfd_openw,(filename, target), return nbfd; } +/* + +FUNCTION + bfd_close + +SYNOPSIS + boolean bfd_close(bfd *); + +DESCRIPTION + + This function closes a BFD. If the BFD was open for writing, + then pending operations are completed and the file written out + and closed. If the created file is executable, then + <> is called to mark it as such. + + All memory attached to the BFD's obstacks is released. + +RETURNS + <> is returned if all is ok, otherwise <>. +*/ + - -/** Close up shop, get your deposit back. */ boolean -bfd_close (abfd) - bfd *abfd; +DEFUN(bfd_close,(abfd), + bfd *abfd) { + if (!bfd_read_p(abfd)) + if (BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)) != true) + return false; + if (BFD_SEND (abfd, _close_and_cleanup, (abfd)) != true) return false; bfd_cache_close(abfd); -/* If the file was open for writing and is now executable - make it so */ + + /* If the file was open for writing and is now executable, + make it so */ if (abfd->direction == write_direction && abfd->flags & EXEC_P) { struct stat buf; stat(abfd->filename, &buf); - chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH); +#ifndef S_IXUSR +#define S_IXUSR 0100 /* Execute by owner. */ +#endif +#ifndef S_IXGRP +#define S_IXGRP 0010 /* Execute by group. */ +#endif +#ifndef S_IXOTH +#define S_IXOTH 0001 /* Execute by others. */ +#endif + + chmod(abfd->filename, 0777 & (buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH)); } (void) obstack_free (&abfd->memory, (PTR)0); + (void) free(abfd); return true; } -/* Create a bfd with no associated file or target. */ +/* +FUNCTION + bfd_close_all_done + +SYNOPSIS + boolean bfd_close_all_done(bfd *); + +DESCRIPTION + This function closes a BFD. It differs from <> + since it does not complete any pending operations. This + routine would be used if the application had just used BFD for + swapping and didn't want to use any of the writing code. + + If the created file is executable, then <> is called + to mark it as such. + + All memory attached to the BFD's obstacks is released. + +RETURNS + <> is returned if all is ok, otherwise <>. + +*/ + +boolean +DEFUN(bfd_close_all_done,(abfd), + bfd *abfd) +{ + bfd_cache_close(abfd); + + /* If the file was open for writing and is now executable, + make it so */ + if (abfd->direction == write_direction + && abfd->flags & EXEC_P) { + struct stat buf; + stat(abfd->filename, &buf); +#ifndef S_IXUSR +#define S_IXUSR 0100 /* Execute by owner. */ +#endif +#ifndef S_IXGRP +#define S_IXGRP 0010 /* Execute by group. */ +#endif +#ifndef S_IXOTH +#define S_IXOTH 0001 /* Execute by others. */ +#endif + + chmod(abfd->filename, 0x777 &(buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH)); + } + (void) obstack_free (&abfd->memory, (PTR)0); + (void) free(abfd); + return true; +} + + +/* +FUNCTION + bfd_alloc_size + +SYNOPSIS + bfd_size_type bfd_alloc_size(bfd *abfd); + +DESCRIPTION + Return the number of bytes in the obstacks connected to the + supplied BFD. + +*/ + +bfd_size_type +DEFUN(bfd_alloc_size,(abfd), + bfd *abfd) +{ + struct _obstack_chunk *chunk = abfd->memory.chunk; + size_t size = 0; + while (chunk) { + size += chunk->limit - &(chunk->contents[0]); + chunk = chunk->prev; + } + return size; +} + + + +/* +FUNCTION + bfd_create + +SYNOPSIS + bfd *bfd_create(CONST char *filename, bfd *template); + +DESCRIPTION + This routine creates a new BFD in the manner of + <>, but without opening a file. The new BFD + takes the target from the target used by @var{template}. The + format is always set to <>. + +*/ bfd * DEFUN(bfd_create,(filename, template), CONST char *filename AND - CONST bfd *template) + bfd *template) { bfd *nbfd = new_bfd(); if (nbfd == (bfd *)NULL) { @@ -294,14 +447,46 @@ DEFUN(bfd_create,(filename, template), return nbfd; } -/* Memory allocation */ +/* +INTERNAL_FUNCTION + bfd_alloc_by_size_t + +SYNOPSIS + PTR bfd_alloc_by_size_t(bfd *abfd, size_t wanted); + +DESCRIPTION + This function allocates a block of memory in the obstack + attatched to <> and returns a pointer to it. +*/ + + +PTR +DEFUN(bfd_alloc_by_size_t,(abfd, size), + bfd *abfd AND + size_t size) +{ + PTR res = obstack_alloc(&(abfd->memory), size); + return res; +} + +DEFUN(void bfd_alloc_grow,(abfd, ptr, size), + bfd *abfd AND + PTR ptr AND + bfd_size_type size) +{ + (void) obstack_grow(&(abfd->memory), ptr, size); +} +DEFUN(PTR bfd_alloc_finish,(abfd), + bfd *abfd) +{ + return obstack_finish(&(abfd->memory)); +} DEFUN(PTR bfd_alloc, (abfd, size), bfd *abfd AND bfd_size_type size) { - PTR res = obstack_alloc(&(abfd->memory), (int)size); - return res; + return bfd_alloc_by_size_t(abfd, (size_t)size); } DEFUN(PTR bfd_zalloc,(abfd, size), @@ -324,14 +509,11 @@ DEFUN(PTR bfd_realloc,(abfd, old, size), } -DEFUN(bfd_size_type bfd_alloc_size,(abfd), - bfd *abfd) -{ - struct _obstack_chunk *chunk = abfd->memory.chunk; - size_t size = 0; - while (chunk) { - size += chunk->limit - &(chunk->contents[0]); - chunk = chunk->prev; - } - return size; -} + + + + + + + +