diff options
Diffstat (limited to 'gnu/usr.bin/gdb/bfd/opncls.c')
-rw-r--r-- | gnu/usr.bin/gdb/bfd/opncls.c | 534 |
1 files changed, 534 insertions, 0 deletions
diff --git a/gnu/usr.bin/gdb/bfd/opncls.c b/gnu/usr.bin/gdb/bfd/opncls.c new file mode 100644 index 0000000000000..42858c25919ef --- /dev/null +++ b/gnu/usr.bin/gdb/bfd/opncls.c @@ -0,0 +1,534 @@ +/* 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 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "obstack.h" +extern void bfd_cache_init PARAMS ((bfd *)); +FILE *bfd_open_file PARAMS ((bfd *)); + +/* fdopen is a loser -- we should use stdio exclusively. Unfortunately + if we do that we can't use fcntl. */ + + +#define obstack_chunk_alloc bfd_xmalloc_by_size_t +#define obstack_chunk_free free + +/* Return a new BFD. All BFD's are allocated through this routine. */ + +bfd * +new_bfd PARAMS ((void)) +{ + 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; + nbfd->where = 0; + nbfd->sections = (asection *)NULL; + nbfd->format = bfd_unknown; + nbfd->my_archive = (bfd *)NULL; + nbfd->origin = 0; + nbfd->opened_once = false; + nbfd->output_has_begun = false; + nbfd->section_count = 0; + nbfd->usrdata = (PTR)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; +{ + bfd *nbfd; + + nbfd = new_bfd(); + nbfd->xvec = obfd->xvec; + nbfd->my_archive = obfd; + nbfd->direction = read_direction; + nbfd->target_defaulted = obfd->target_defaulted; + return nbfd; +} + +/* +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 <<fopen>>) with the target + supplied, it returns a pointer to the created BFD. + + If NULL is returned then an error has occured. Possible errors + are <<no_memory>>, <<invalid_target>> or <<system_call>> error. +*/ + +bfd * +DEFUN(bfd_openr, (filename, target), + CONST char *filename AND + CONST char *target) +{ + bfd *nbfd; + bfd_target *target_vec; + + 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->direction = read_direction; + + if (bfd_open_file (nbfd) == NULL) { + bfd_error = system_call_error; /* File didn't exist, or some such */ + bfd_release(nbfd,0); + return NULL; + } + return nbfd; +} + + +/* Don't try to `optimize' this function: + + o - We lock using stack space so that interrupting the locking + won't cause a storage leak. + o - We open the file stream last, since we don't want to have to + 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. + + When the file is later bfd_closed, the file descriptor will be closed. + + If the caller desires that this file descriptor be cached by BFD + (opened as needed, closed as needed to free descriptors for + other opens), with the supplied @var{fd} used as an initial + file descriptor (but subject to closure at any time), set + bfd->cacheable nonzero in the returned BFD. The default is to + assume no cacheing; the file descriptor will remain open until + bfd_close, and will not be affected by BFD operations on other + files. + + Possible errors are no_memory, invalid_target and system_call + error. +*/ + +bfd * +DEFUN(bfd_fdopenr,(filename, target, fd), + CONST char *filename AND + CONST char *target AND + int fd) +{ + bfd *nbfd; + bfd_target *target_vec; + int fdflags; + + bfd_error = system_call_error; + +#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(); + + 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; + } +#if defined(VMS) || defined(__GO32__) + nbfd->iostream = (char *)fopen(filename, FOPEN_RB); +#else + /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ + switch (fdflags & (O_ACCMODE)) { + case O_RDONLY: nbfd->iostream = (char *) fdopen (fd, FOPEN_RB); break; + case O_WRONLY: nbfd->iostream = (char *) fdopen (fd, FOPEN_RUB); break; + case O_RDWR: nbfd->iostream = (char *) fdopen (fd, FOPEN_RUB); break; + default: abort (); + } +#endif + if (nbfd->iostream == NULL) { + (void) obstack_free (&nbfd->memory, (PTR)0); + return NULL; + } + + /* OK, put everything where it belongs */ + + nbfd->filename = filename; + + /* 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. */ + /* (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 (); + } + + bfd_cache_init (nbfd); + + return nbfd; +} + +/** bfd_openw -- open for writing. + 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 + CONST char *target) +{ + bfd *nbfd; + bfd_target *target_vec; + + bfd_error = system_call_error; + + /* nbfd has to point to head of malloc'ed block so that bfd_close may + reclaim it correctly. */ + + nbfd = new_bfd(); + if (nbfd == NULL) { + bfd_error = no_memory; + return NULL; + } + + target_vec = bfd_find_target (target, nbfd); + if (target_vec == NULL) return NULL; + + nbfd->filename = filename; + nbfd->direction = write_direction; + + if (bfd_open_file (nbfd) == NULL) { + bfd_error = system_call_error; /* File not writeable, etc */ + (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 + <<chmod>> is called to mark it as such. + + All memory attached to the BFD's obstacks is released. + + The file descriptor associated with the BFD is closed (even + if it was passed in to BFD by bfd_fdopenr). + +RETURNS + <<true>> is returned if all is ok, otherwise <<false>>. +*/ + + +boolean +DEFUN(bfd_close,(abfd), + bfd *abfd) +{ + boolean ret; + + 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; + + ret = bfd_cache_close(abfd); + + /* If the file was open for writing and is now executable, + make it so */ + if (ret == true + && 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, 0777 & (buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH)); + } + (void) obstack_free (&abfd->memory, (PTR)0); + (void) free(abfd); + return ret; +} + +/* +FUNCTION + bfd_close_all_done + +SYNOPSIS + boolean bfd_close_all_done(bfd *); + +DESCRIPTION + This function closes a BFD. It differs from <<bfd_close>> + 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 <<chmod>> is called + to mark it as such. + + All memory attached to the BFD's obstacks is released. + +RETURNS + <<true>> is returned if all is ok, otherwise <<false>>. + +*/ + +boolean +DEFUN(bfd_close_all_done,(abfd), + bfd *abfd) +{ + boolean ret; + + ret = bfd_cache_close(abfd); + + /* If the file was open for writing and is now executable, + make it so */ + if (ret == true + && 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 ret; +} + + +/* +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 *templ); + +DESCRIPTION + This routine creates a new BFD in the manner of + <<bfd_openw>>, 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_object>>. + +*/ + +bfd * +DEFUN(bfd_create,(filename, templ), + CONST char *filename AND + bfd *templ) +{ + bfd *nbfd = new_bfd(); + if (nbfd == (bfd *)NULL) { + bfd_error = no_memory; + return (bfd *)NULL; + } + nbfd->filename = filename; + if(templ) { + nbfd->xvec = templ->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 <<abfd>> 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 + size_t 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 + size_t size) +{ + return bfd_alloc_by_size_t(abfd, (size_t)size); +} + +DEFUN(PTR bfd_zalloc,(abfd, size), + bfd *abfd AND + size_t size) +{ + PTR res; + 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 + size_t size) +{ + PTR res = bfd_alloc(abfd, size); + memcpy(res, old, (size_t)size); + return res; +} |