X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Fopncls.c;h=3acc1fd844366d3bc1b96c93aec873661189f9cb;hb=3be56062313b092e65b8e99d79469f165d5d9b1a;hp=585acea5076624f947bc15f0106239a359997004;hpb=9846338e68f0951443690e50cb678082a86be57e;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/opncls.c b/bfd/opncls.c index 585acea507..3acc1fd844 100644 --- a/bfd/opncls.c +++ b/bfd/opncls.c @@ -1,61 +1,53 @@ -/* Copyright (C) 1990, 1991 Free Software Foundation, Inc. +/* opncls.c -- open and close a BFD. + Copyright (C) 1990-1991 Free Software Foundation, Inc. + Written by Cygnus Support. -This file is part of BFD, the Binary File Diddler. +This file is part of BFD, the Binary File Descriptor library. -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. */ /* $Id$ */ -/*** opncls.c -- open and close a bfd. */ - -#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 bfd_xmalloc +#define obstack_chunk_free free + +/* Return a new BFD. All BFD's are allocated through this routine. */ bfd *new_bfd() { - bfd *nbfd = (bfd *)zalloc(sizeof(bfd)); + bfd *nbfd; + + 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; @@ -71,8 +63,14 @@ bfd *new_bfd() nbfd->sections = (asection *)NULL; nbfd->cacheable = false; nbfd->flags = NO_FLAGS; + nbfd->mtime_set = false; + + return nbfd; } + +/* Allocate a new BFD as a member of archive OBFD. */ + bfd *new_bfd_contained_in(obfd) bfd *obfd; { @@ -80,11 +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), @@ -94,26 +111,24 @@ 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) { bfd_error = system_call_error; /* File didn't exist, or some such */ - free (nbfd); + bfd_release(nbfd,0); return NULL; } return nbfd; @@ -128,6 +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), @@ -138,25 +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(); @@ -164,45 +184,64 @@ 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) { - free (nbfd); + (void) obstack_free (&nbfd->memory, (PTR)0); return NULL; } /* 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 @@ -211,9 +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 @@ -225,46 +261,177 @@ 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) { bfd_error = system_call_error; /* File not writeable, etc */ - free (nbfd); + (void) obstack_free (&nbfd->memory, (PTR)0); return NULL; } 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)); } - free (abfd); + (void) obstack_free (&abfd->memory, (PTR)0); + (void) free(abfd); return true; } -/* - called to create a bfd with no ascociated 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) { @@ -272,10 +439,81 @@ DEFUN(bfd_create,(filename, template), return (bfd *)NULL; } nbfd->filename = filename; - nbfd->xvec = template->xvec; + if(template) { + nbfd->xvec = template->xvec; + } nbfd->direction = no_direction; + bfd_set_format(nbfd, bfd_object); return nbfd; +} +/* +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) +{ + return bfd_alloc_by_size_t(abfd, (size_t)size); +} + +DEFUN(PTR bfd_zalloc,(abfd, size), + bfd *abfd AND + bfd_size_type size) +{ + PTR res = bfd_alloc(abfd, size); + memset(res, 0, (size_t)size); + return res; +} + +DEFUN(PTR bfd_realloc,(abfd, old, size), + bfd *abfd AND + PTR old AND + bfd_size_type size) +{ + PTR res = bfd_alloc(abfd, size); + memcpy(res, old, (size_t)size); + return res; +} + + + + + + + + + +