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author | Lorenz Meier <lm@inf.ethz.ch> | 2013-06-01 01:04:32 +0200 |
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committer | Lorenz Meier <lm@inf.ethz.ch> | 2013-06-01 01:04:32 +0200 |
commit | 5375bb5b86e266157ceceef08c367da711b8144e (patch) | |
tree | 88bc81cab11d8f0b2b6f9391f803051c081b2ecb /nuttx/binfmt/libelf/libelf_bind.c | |
parent | 27ee36b2049167a1272122548fe61aa2993d79c1 (diff) | |
download | px4-firmware-5375bb5b86e266157ceceef08c367da711b8144e.tar.gz px4-firmware-5375bb5b86e266157ceceef08c367da711b8144e.tar.bz2 px4-firmware-5375bb5b86e266157ceceef08c367da711b8144e.zip |
Cleanup, WIP, needs a NuttX checkout to Firmware/NuttX now
Diffstat (limited to 'nuttx/binfmt/libelf/libelf_bind.c')
-rw-r--r-- | nuttx/binfmt/libelf/libelf_bind.c | 334 |
1 files changed, 0 insertions, 334 deletions
diff --git a/nuttx/binfmt/libelf/libelf_bind.c b/nuttx/binfmt/libelf/libelf_bind.c deleted file mode 100644 index ccdb5108e..000000000 --- a/nuttx/binfmt/libelf/libelf_bind.c +++ /dev/null @@ -1,334 +0,0 @@ -/**************************************************************************** - * binfmt/libelf/libelf_bind.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 <stdint.h> -#include <string.h> -#include <elf32.h> -#include <errno.h> -#include <assert.h> -#include <debug.h> - -#include <nuttx/binfmt/elf.h> -#include <nuttx/binfmt/symtab.h> - -#include "libelf.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/* CONFIG_DEBUG, CONFIG_DEBUG_VERBOSE, and CONFIG_DEBUG_BINFMT have to be - * defined or CONFIG_ELF_DUMPBUFFER does nothing. - */ - -#if !defined(CONFIG_DEBUG_VERBOSE) || !defined (CONFIG_DEBUG_BINFMT) -# undef CONFIG_ELF_DUMPBUFFER -#endif - -#ifndef CONFIG_ELF_BUFFERSIZE -# define CONFIG_ELF_BUFFERSIZE 128 -#endif - -#ifdef CONFIG_ELF_DUMPBUFFER -# define elf_dumpbuffer(m,b,n) bvdbgdumpbuffer(m,b,n) -#else -# define elf_dumpbuffer(m,b,n) -#endif - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: elf_readrel - * - * Description: - * Read the ELF32_Rel structure into memory. - * - ****************************************************************************/ - -static inline int elf_readrel(FAR struct elf_loadinfo_s *loadinfo, - FAR const Elf32_Shdr *relsec, - int index, FAR Elf32_Rel *rel) -{ - off_t offset; - - /* Verify that the symbol table index lies within symbol table */ - - if (index < 0 || index > (relsec->sh_size / sizeof(Elf32_Rel))) - { - bdbg("Bad relocation symbol index: %d\n", index); - return -EINVAL; - } - - /* Get the file offset to the symbol table entry */ - - offset = relsec->sh_offset + sizeof(Elf32_Rel) * index; - - /* And, finally, read the symbol table entry into memory */ - - return elf_read(loadinfo, (FAR uint8_t*)rel, sizeof(Elf32_Rel), offset); -} - -/**************************************************************************** - * Name: elf_relocate and elf_relocateadd - * - * Description: - * Perform all relocations associated with a section. - * - * Returned Value: - * 0 (OK) is returned on success and a negated errno is returned on - * failure. - * - ****************************************************************************/ - -static int elf_relocate(FAR struct elf_loadinfo_s *loadinfo, int relidx, - FAR const struct symtab_s *exports, int nexports) - -{ - FAR Elf32_Shdr *relsec = &loadinfo->shdr[relidx]; - FAR Elf32_Shdr *dstsec = &loadinfo->shdr[relsec->sh_info]; - Elf32_Rel rel; - Elf32_Sym sym; - uintptr_t addr; - int symidx; - int ret; - int i; - - /* Examine each relocation in the section. 'relsec' is the section - * containing the relations. 'dstsec' is the section containing the data - * to be relocated. - */ - - for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++) - { - /* Read the relocation entry into memory */ - - ret = elf_readrel(loadinfo, relsec, i, &rel); - if (ret < 0) - { - bdbg("Section %d reloc %d: Failed to read relocation entry: %d\n", - relidx, i, ret); - return ret; - } - - /* Get the symbol table index for the relocation. This is contained - * in a bit-field within the r_info element. - */ - - symidx = ELF32_R_SYM(rel.r_info); - - /* Read the symbol table entry into memory */ - - ret = elf_readsym(loadinfo, symidx, &sym); - if (ret < 0) - { - bdbg("Section %d reloc %d: Failed to read symbol[%d]: %d\n", - relidx, i, symidx, ret); - return ret; - } - - /* Get the value of the symbol (in sym.st_value) */ - - ret = elf_symvalue(loadinfo, &sym, exports, nexports); - if (ret < 0) - { - bdbg("Section %d reloc %d: Failed to get value of symbol[%d]: %d\n", - relidx, i, symidx, ret); - return ret; - } - - /* Calculate the relocation address. */ - - if (rel.r_offset < 0 || rel.r_offset > dstsec->sh_size - sizeof(uint32_t)) - { - bdbg("Section %d reloc %d: Relocation address out of range, offset %d size %d\n", - relidx, i, rel.r_offset, dstsec->sh_size); - return -EINVAL; - } - - addr = dstsec->sh_addr + rel.r_offset; - - /* If CONFIG_ADDRENV=y, then 'addr' lies in a virtual address space that - * may not be in place now. elf_addrenv_select() will temporarily - * instantiate that address space. - */ - -#ifdef CONFIG_ADDRENV - ret = elf_addrenv_select(loadinfo); - if (ret < 0) - { - bdbg("ERROR: elf_addrenv_select() failed: %d\n", ret); - return ret; - } -#endif - - /* Now perform the architecture-specific relocation */ - - ret = arch_relocate(&rel, &sym, addr); - if (ret < 0) - { -#ifdef CONFIG_ADDRENV - (void)elf_addrenv_restore(loadinfo); -#endif - bdbg("ERROR: Section %d reloc %d: Relocation failed: %d\n", ret); - return ret; - } - - /* Restore the original address environment */ - -#ifdef CONFIG_ADDRENV - ret = elf_addrenv_restore(loadinfo); - if (ret < 0) - { - bdbg("ERROR: elf_addrenv_restore() failed: %d\n", ret); - return ret; - } -#endif - } - - return OK; -} - -static int elf_relocateadd(FAR struct elf_loadinfo_s *loadinfo, int relidx, - FAR const struct symtab_s *exports, int nexports) -{ - bdbg("Not implemented\n"); - return -ENOSYS; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: elf_bind - * - * Description: - * Bind the imported symbol names in the loaded module described by - * 'loadinfo' using the exported symbol values provided by 'symtab'. - * - * Returned Value: - * 0 (OK) is returned on success and a negated errno is returned on - * failure. - * - ****************************************************************************/ - -int elf_bind(FAR struct elf_loadinfo_s *loadinfo, - FAR const struct symtab_s *exports, int nexports) -{ - int ret; - int i; - - /* Find the symbol and string tables */ - - ret = elf_findsymtab(loadinfo); - if (ret < 0) - { - return ret; - } - - /* Allocate an I/O buffer. This buffer is used by elf_symname() to - * accumulate the variable length symbol name. - */ - - ret = elf_allocbuffer(loadinfo); - if (ret < 0) - { - bdbg("elf_allocbuffer failed: %d\n", ret); - return -ENOMEM; - } - - /* Process relocations in every allocated section */ - - for (i = 1; i < loadinfo->ehdr.e_shnum; i++) - { - /* Get the index to the relocation section */ - - int infosec = loadinfo->shdr[i].sh_info; - if (infosec >= loadinfo->ehdr.e_shnum) - { - continue; - } - - /* Make sure that the section is allocated. We can't relocated - * sections that were not loaded into memory. - */ - - if ((loadinfo->shdr[infosec].sh_flags & SHF_ALLOC) == 0) - { - continue; - } - - /* Process the relocations by type */ - - if (loadinfo->shdr[i].sh_type == SHT_REL) - { - ret = elf_relocate(loadinfo, i, exports, nexports); - } - else if (loadinfo->shdr[i].sh_type == SHT_RELA) - { - ret = elf_relocateadd(loadinfo, i, exports, nexports); - } - - if (ret < 0) - { - break; - } - } - - /* Flush the instruction cache before starting the newly loaded module */ - -#ifdef CONFIG_ELF_ICACHE - arch_flushicache((FAR void*)loadinfo->elfalloc, loadinfo->elfsize); -#endif - - return ret; -} - |