diff options
Diffstat (limited to 'nuttx/binfmt/libelf/libelf_dtors.c')
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_dtors.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/nuttx/binfmt/libelf/libelf_dtors.c b/nuttx/binfmt/libelf/libelf_dtors.c deleted file mode 100644 index c0c73a337..000000000 --- a/nuttx/binfmt/libelf/libelf_dtors.c +++ /dev/null @@ -1,215 +0,0 @@ -/**************************************************************************** - * binfmt/libelf/libelf_dtors.c - * - * Copyright (C) 2012 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <string.h> -#include <errno.h> -#include <assert.h> -#include <debug.h> - -#include <nuttx/kmalloc.h> -#include <nuttx/binfmt/elf.h> - -#include "libelf.h" - -#ifdef CONFIG_BINFMT_CONSTRUCTORS - -/**************************************************************************** - * Pre-Processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Constant Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: elf_loaddtors - * - * Description: - * Load pointers to static destructors into an in-memory array. - * - * Input Parameters: - * loadinfo - Load state information - * - * Returned Value: - * 0 (OK) is returned on success and a negated errno is returned on - * failure. - * - ****************************************************************************/ - -int elf_loaddtors(FAR struct elf_loadinfo_s *loadinfo) -{ - FAR Elf32_Shdr *shdr; - size_t dtorsize; - int dtoridx; - int ret; - int i; - - DEBUGASSERT(loadinfo->dtors == NULL); - - /* Allocate an I/O buffer if necessary. This buffer is used by - * elf_sectname() to accumulate the variable length symbol name. - */ - - ret = elf_allocbuffer(loadinfo); - if (ret < 0) - { - bdbg("elf_allocbuffer failed: %d\n", ret); - return -ENOMEM; - } - - /* Find the index to the section named ".dtors." NOTE: On old ABI system, - * .dtors is the name of the section containing the list of destructors; - * On newer systems, the similar section is called .fini_array. It is - * expected that the linker script will force the section name to be ".dtors" - * in either case. - */ - - dtoridx = elf_findsection(loadinfo, ".dtors"); - if (dtoridx < 0) - { - /* This may not be a failure. -ENOENT indicates that the file has no - * static destructor section. - */ - - bvdbg("elf_findsection .dtors section failed: %d\n", dtoridx); - return ret == -ENOENT ? OK : ret; - } - - /* Now we can get a pointer to the .dtor section in the section header - * table. - */ - - shdr = &loadinfo->shdr[dtoridx]; - - /* Get the size of the .dtor section and the number of destructors that - * will need to be called. - */ - - dtorsize = shdr->sh_size; - loadinfo->ndtors = dtorsize / sizeof(binfmt_dtor_t); - - bvdbg("dtoridx=%d dtorsize=%d sizeof(binfmt_dtor_t)=%d ndtors=%d\n", - dtoridx, dtorsize, sizeof(binfmt_dtor_t), loadinfo->ndtors); - - /* Check if there are any destructors. It is not an error if there - * are none. - */ - - if (loadinfo->ndtors > 0) - { - /* Check an assumption that we made above */ - - DEBUGASSERT(shdr->sh_size == loadinfo->ndtors * sizeof(binfmt_dtor_t)); - - /* In the old ABI, the .dtors section is not allocated. In that case, - * we need to allocate memory to hold the .dtors and then copy the - * from the file into the allocated memory. - * - * SHF_ALLOC indicates that the section requires memory during - * execution. - */ - - if ((shdr->sh_flags & SHF_ALLOC) == 0) - { - /* Allocate memory to hold a copy of the .dtor section */ - - loadinfo->ctoralloc = (binfmt_dtor_t*)kmalloc(dtorsize); - if (!loadinfo->ctoralloc) - { - bdbg("Failed to allocate memory for .dtors\n"); - return -ENOMEM; - } - - loadinfo->dtors = (binfmt_dtor_t *)loadinfo->ctoralloc; - - /* Read the section header table into memory */ - - ret = elf_read(loadinfo, (FAR uint8_t*)loadinfo->dtors, dtorsize, - shdr->sh_offset); - if (ret < 0) - { - bdbg("Failed to allocate .dtors: %d\n", ret); - return ret; - } - - /* Fix up all of the .dtor addresses. Since the addresses - * do not lie in allocated memory, there will be no relocation - * section for them. - */ - - for (i = 0; i < loadinfo->ndtors; i++) - { - FAR uintptr_t *ptr = (uintptr_t *)((FAR void *)(&loadinfo->dtors)[i]); - - bvdbg("dtor %d: %08lx + %08lx = %08lx\n", - i, *ptr, loadinfo->elfalloc, *ptr + loadinfo->elfalloc); - - *ptr += loadinfo->elfalloc; - } - } - else - { - - /* Save the address of the .dtors (actually, .init_array) where it was - * loaded into memory. Since the .dtors lie in allocated memory, they - * will be relocated via the normal mechanism. - */ - - loadinfo->dtors = (binfmt_dtor_t*)shdr->sh_addr; - } - } - - return OK; -} - -#endif /* CONFIG_BINFMT_CONSTRUCTORS */ |