346 lines
11 KiB
C
346 lines
11 KiB
C
/****************************************************************************
|
|
* binfmt/libelf/libelf.h
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __BINFMT_LIBELF_LIBELF_H
|
|
#define __BINFMT_LIBELF_LIBELF_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/binfmt/elf.h>
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: elf_verifyheader
|
|
*
|
|
* Description:
|
|
* Given the header from a possible ELF executable, verify that it is
|
|
* an ELF executable.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_verifyheader(FAR const Elf_Ehdr *header);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_read
|
|
*
|
|
* Description:
|
|
* Read 'readsize' bytes from the object file at 'offset'. The data is
|
|
* read into 'buffer.' If 'buffer' is part of the ELF address environment,
|
|
* then the caller is responsible for assuring that that address
|
|
* environment is in place before calling this function (i.e., that
|
|
* elf_addrenv_select() has been called if CONFIG_ARCH_ADDRENV=y).
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_read(FAR struct elf_loadinfo_s *loadinfo, FAR uint8_t *buffer,
|
|
size_t readsize, off_t offset);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_loadphdrs
|
|
*
|
|
* Description:
|
|
* Loads program headers into memory.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_loadphdrs(FAR struct elf_loadinfo_s *loadinfo);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_loadshdrs
|
|
*
|
|
* Description:
|
|
* Loads section headers into memory.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_loadshdrs(FAR struct elf_loadinfo_s *loadinfo);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_findsection
|
|
*
|
|
* Description:
|
|
* A section by its name.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
* sectname - Name of the section to find
|
|
*
|
|
* Returned Value:
|
|
* On success, the index to the section is returned; A negated errno value
|
|
* is returned on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_findsection(FAR struct elf_loadinfo_s *loadinfo,
|
|
FAR const char *sectname);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_findsymtab
|
|
*
|
|
* Description:
|
|
* Find the symbol table section.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_findsymtab(FAR struct elf_loadinfo_s *loadinfo);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_readsym
|
|
*
|
|
* Description:
|
|
* Read the ELF symbol structure at the specified index into memory.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
* index - Symbol table index
|
|
* sym - Location to return the table entry
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_readsym(FAR struct elf_loadinfo_s *loadinfo, int index,
|
|
FAR Elf_Sym *sym);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_symvalue
|
|
*
|
|
* Description:
|
|
* Get the value of a symbol. The updated value of the symbol is returned
|
|
* in the st_value field of the symbol table entry.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
* sym - Symbol table entry (value might be undefined)
|
|
* exports - The symbol table to use for resolving undefined symbols.
|
|
* nexports - Number of symbols in the symbol table.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
* EINVAL - There is something inconsistent in the symbol table (should
|
|
* only happen if the file is corrupted)
|
|
* ENOSYS - Symbol lies in common
|
|
* ESRCH - Symbol has no name
|
|
* ENOENT - Symbol undefined and not provided via a symbol table
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_symvalue(FAR struct elf_loadinfo_s *loadinfo, FAR Elf_Sym *sym,
|
|
FAR const struct symtab_s *exports, int nexports);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_freebuffers
|
|
*
|
|
* Description:
|
|
* Release all working buffers.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_freebuffers(FAR struct elf_loadinfo_s *loadinfo);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_allocbuffer
|
|
*
|
|
* Description:
|
|
* Perform the initial allocation of the I/O buffer, if it has not already
|
|
* been allocated.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_allocbuffer(FAR struct elf_loadinfo_s *loadinfo);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_reallocbuffer
|
|
*
|
|
* Description:
|
|
* Increase the size of I/O buffer by the specified buffer increment.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_reallocbuffer(FAR struct elf_loadinfo_s *loadinfo, size_t increment);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_findctors
|
|
*
|
|
* Description:
|
|
* Find C++ static constructors.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_BINFMT_CONSTRUCTORS
|
|
int elf_loadctors(FAR struct elf_loadinfo_s *loadinfo);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_BINFMT_CONSTRUCTORS
|
|
int elf_loaddtors(FAR struct elf_loadinfo_s *loadinfo);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: elf_addrenv_alloc
|
|
*
|
|
* Description:
|
|
* Allocate memory for the ELF image (textalloc and dataalloc).
|
|
* If CONFIG_ARCH_ADDRENV=n, textalloc will be allocated using kmm_zalloc()
|
|
* and dataalloc will be a offset from textalloc.
|
|
* If CONFIG_ARCH_ADDRENV=y, then textalloc and dataalloc will be allocated
|
|
* using up_addrenv_create().
|
|
* In either case, there will be a unique instance of textalloc and
|
|
* dataalloc (and stack) for each instance of a process.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
* textsize - The size (in bytes) of the .text address environment needed
|
|
* for the ELF image (read/execute).
|
|
* datasize - The size (in bytes) of the .bss/.data address environment
|
|
* needed for the ELF image (read/write).
|
|
* heapsize - The initial size (in bytes) of the heap address environment
|
|
* needed by the task. This region may be read/write only.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int elf_addrenv_alloc(FAR struct elf_loadinfo_s *loadinfo, size_t textsize,
|
|
size_t datasize, size_t heapsize);
|
|
|
|
/****************************************************************************
|
|
* Name: elf_addrenv_select
|
|
*
|
|
* Description:
|
|
* Temporarily select the task's address environment.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
int elf_addrenv_select(FAR struct elf_loadinfo_s *loadinfo);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: elf_addrenv_restore
|
|
*
|
|
* Description:
|
|
* Restore the address environment before elf_addrenv_select() was called..
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
int elf_addrenv_restore(FAR struct elf_loadinfo_s *loadinfo);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: elf_addrenv_free
|
|
*
|
|
* Description:
|
|
* Release the address environment previously created by
|
|
* elf_addrenv_alloc(). This function is called only under certain error
|
|
* conditions after the module has been loaded but not yet started.
|
|
* After the module has been started, the address environment will
|
|
* automatically be freed when the module exits.
|
|
*
|
|
* Input Parameters:
|
|
* loadinfo - Load state information
|
|
*
|
|
* Returned Value:
|
|
* None.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void elf_addrenv_free(FAR struct elf_loadinfo_s *loadinfo);
|
|
|
|
#endif /* __BINFMT_LIBELF_LIBELF_H */
|