diff options
author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-24 16:46:12 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-24 16:46:12 +0000 |
commit | 31d66d5fb2961c4c2df0d9f415f91ee5405f8d19 (patch) | |
tree | 199c1ac47d5ce30532f7b23121bc7df2c580a8c6 /nuttx/binfmt/libelf | |
parent | e2cd590a6f7e1a4132d2eda16e1f29c760b804bb (diff) | |
download | px4-nuttx-31d66d5fb2961c4c2df0d9f415f91ee5405f8d19.tar.gz px4-nuttx-31d66d5fb2961c4c2df0d9f415f91ee5405f8d19.tar.bz2 px4-nuttx-31d66d5fb2961c4c2df0d9f415f91ee5405f8d19.zip |
Add framework to support loadable ELF modules (not much logic in place yet)
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5250 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/binfmt/libelf')
-rw-r--r-- | nuttx/binfmt/libelf/Kconfig | 9 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/Make.defs | 53 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/gnu-elf.ld | 187 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_bind.c | 106 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_init.c | 189 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_load.c | 91 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_read.c | 165 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_uninit.c | 85 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_unload.c | 97 | ||||
-rw-r--r-- | nuttx/binfmt/libelf/libelf_verify.c | 88 |
10 files changed, 1070 insertions, 0 deletions
diff --git a/nuttx/binfmt/libelf/Kconfig b/nuttx/binfmt/libelf/Kconfig new file mode 100644 index 000000000..c47bc9f9e --- /dev/null +++ b/nuttx/binfmt/libelf/Kconfig @@ -0,0 +1,9 @@ +# +# For a description of the syntax of this configuration file, +# see misc/tools/kconfig-language.txt. +# + +config ELF_DUMPBUFFER + bool "Dump ELF buffers" + default n + depends on DEBUG && DEBUG_VERBOSE diff --git a/nuttx/binfmt/libelf/Make.defs b/nuttx/binfmt/libelf/Make.defs new file mode 100644 index 000000000..629961863 --- /dev/null +++ b/nuttx/binfmt/libelf/Make.defs @@ -0,0 +1,53 @@ +############################################################################ +# binfmt/libelf/Make.defs +# +# 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. +# +############################################################################ + +ifeq ($(CONFIG_ELF),y) + +# ELF application interfaces + +BINFMT_CSRCS += elf.c + +# ELF library + +BINFMT_CSRCS = libelf_init.c libelf_uninit.c libelf_load.c \ + libelf_unload.c libelf_verify.c libelf_read.c \ + libelf_bind.c + +# Hook the libelf subdirectory into the build + +VPATH += libelf +SUBDIRS += libelf + +endif diff --git a/nuttx/binfmt/libelf/gnu-elf.ld b/nuttx/binfmt/libelf/gnu-elf.ld new file mode 100644 index 000000000..703f36981 --- /dev/null +++ b/nuttx/binfmt/libelf/gnu-elf.ld @@ -0,0 +1,187 @@ +/**************************************************************************** + * examples/elf/gnu-elf-gotoff.ld + * + * Copyright (C) 2009, 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. + * + ****************************************************************************/ + +MEMORY +{ + ISPACE : ORIGIN = 0x0, LENGTH = 2097152 + DSPACE : ORIGIN = 0x0, LENGTH = 2097152 +} + +/**************************************************************************** + * The XFLAT program image is divided into two segments: + * + * (1) ISpace (Instruction Space). This is the segment that contains + * code (.text). Everything in the segment should be fetch-able + * machine PC instructions (jump, branch, call, etc.). + * (2) DSpace (Data Space). This is the segment that contains both + * read-write data (.data, .bss) as well as read-only data (.rodata). + * Everything in this segment should be access-able with machine + * PIC load and store instructions. + * + * Older versions of GCC (at least up to GCC 4.3.3), use GOT-relative + * addressing to access RO data. In that case, read-only data (.rodata) must + * reside in D-Space and this linker script should be used. + * + * Newer versions of GCC (at least as of GCC 4.6.3), use PC-relative + * addressing to access RO data. In that case, read-only data (.rodata) must + * reside in I-Space and this linker script should NOT be used with those + * newer tools. + * + ****************************************************************************/ + +SECTIONS +{ + .text 0x00000000 : + { + /* ISpace is located at address 0. Every (unrelocated) ISpace + * address is an offset from the begining of this segment. + */ + + text_start = . ; + + *(.text) + *(.text.*) + *(.gnu.warning) + *(.stub) + *(.glue_7) + *(.glue_7t) + *(.jcr) + + /* C++ support: The .init and .fini sections contain XFLAT- + * specific logic to manage static constructors and destructors. + */ + + *(.gnu.linkonce.t.*) + *(.init) + *(.fini) + + /* This is special code area at the end of the normal + text section. It contains a small lookup table at + the start followed by the code pointed to by entries + in the lookup table. */ + + . = ALIGN (4) ; + PROVIDE(__ctbp = .); + *(.call_table_data) + *(.call_table_text) + + _etext = . ; + + } > ISPACE + + /* DSpace is also located at address 0. Every (unrelocated) DSpace + * address is an offset from the begining of this segment. + */ + + .data 0x00000000 : + { + /* In this model, .rodata is access using PC-relative addressing + * and, hence, must also reside in the .text section. + */ + + __data_start = . ; + *(.rodata) + *(.rodata1) + *(.rodata.*) + *(.gnu.linkonce.r*) + + *(.data) + *(.data1) + *(.data.*) + *(.gnu.linkonce.d*) + *(.data1) + *(.eh_frame) + *(.gcc_except_table) + + *(.gnu.linkonce.s.*) + *(__libc_atexit) + *(__libc_subinit) + *(__libc_subfreeres) + *(.note.ABI-tag) + + /* C++ support. For each global and static local C++ object, + * GCC creates a small subroutine to construct the object. Pointers + * to these routines (not the routines themselves) are stored as + * simple, linear arrays in the .ctors section of the object file. + * Similarly, pointers to global/static destructor routines are + * stored in .dtors. + */ + + *(.gnu.linkonce.d.*) + + _ctors_start = . ; + *(.ctors) + _ctors_end = . ; + _dtors_start = . ; + *(.dtors) + _dtors_end = . ; + + _edata = . ; + edata = ALIGN( 0x10 ) ; + } > DSPACE + + .bss : + { + __bss_start = _edata ; + *(.dynsbss) + *(.sbss) + *(.sbss.*) + *(.scommon) + *(.dynbss) + *(.bss) + *(.bss.*) + *(.bss*) + *(.gnu.linkonce.b*) + *(COMMON) + end = ALIGN( 0x10 ) ; + _end = ALIGN( 0x10 ) ; + } > DSPACE + + .got 0 : { *(.got.plt) *(.got) } + .junk 0 : { *(.rel*) *(.rela*) } + /* Stabs debugging sections. */ + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_info 0 : { *(.debug_info) } + .debug_line 0 : { *(.debug_line) } + .debug_pubnames 0 : { *(.debug_pubnames) } + .debug_aranges 0 : { *(.debug_aranges) } +} diff --git a/nuttx/binfmt/libelf/libelf_bind.c b/nuttx/binfmt/libelf/libelf_bind.c new file mode 100644 index 000000000..44532ab88 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_bind.c @@ -0,0 +1,106 @@ +/**************************************************************************** + * 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 <elf.h> +#include <errno.h> +#include <assert.h> +#include <debug.h> + +#include <arpa/inet.h> +#include <nuttx/elf.h> +#include <nuttx/symtab.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 + +#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 + ****************************************************************************/ + +/**************************************************************************** + * 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) +{ +#warning "Missing logic" + return -ENOSYS; +} + diff --git a/nuttx/binfmt/libelf/libelf_init.c b/nuttx/binfmt/libelf/libelf_init.c new file mode 100644 index 000000000..d72e96b62 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_init.c @@ -0,0 +1,189 @@ +/**************************************************************************** + * binfmt/libelf/libelf_init.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 <sys/stat.h> +#include <stdint.h> +#include <string.h> +#include <fcntl.h> +#include <elf.h> +#include <debug.h> +#include <errno.h> + +#include <arpa/inet.h> +#include <nuttx/elf.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 + +#ifdef CONFIG_ELF_DUMPBUFFER +# define elf_dumpbuffer(m,b,n) bvdbgdumpbuffer(m,b,n) +#else +# define elf_dumpbuffer(m,b,n) +#endif + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_init + * + * Description: + * This function is called to configure the library to process an ELF + * program binary. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_init(FAR const char *filename, FAR struct elf_loadinfo_s *loadinfo) +{ + uint32_t datastart; + uint32_t dataend; + uint32_t bssstart; + uint32_t bssend; + int ret; + + bvdbg("filename: %s loadinfo: %p\n", filename, loadinfo); + + /* Clear the load info structure */ + + memset(loadinfo, 0, sizeof(struct elf_loadinfo_s)); + + /* Open the binary file */ + + loadinfo->filfd = open(filename, O_RDONLY); + if (loadinfo->filfd < 0) + { + bdbg("Failed to open ELF binary %s: %d\n", filename, ret); + return -errno; + } + + /* Read the ELF header from offset 0 */ + + ret = elf_read(loadinfo, (char*)&loadinfo->header, + sizeof(struct elf_hdr_s), 0); + if (ret < 0) + { + bdbg("Failed to read ELF header: %d\n", ret); + return ret; + } + + elf_dumpbuffer("ELF header", (FAR const uint8_t*)&loadinfo->header, + sizeof(struct elf_hdr_s)); + + /* Verify the ELF header */ + + if (elf_verifyheader(&loadinfo->header) != 0) + { + /* This is not an error because we will be called to attempt loading + * EVERY binary. Returning -ENOEXEC simply informs the system that + * the file is not an ELF file. Besides, if there is something worth + * complaining about, nelf_verifyheader() has already + * done so. + */ + + bdbg("Bad ELF header\n"); + return -ENOEXEC; + } + + /* Save all of the input values in the loadinfo structure + * and extract some additional information from the xflat + * header. Note that the information in the xflat header is in + * network order. + */ + + datastart = ntohl(loadinfo->header.h_datastart); + dataend = ntohl(loadinfo->header.h_dataend); + bssstart = dataend; + bssend = ntohl(loadinfo->header.h_bssend); + + /* And put this information into the loadinfo structure as well. + * + * Note that: + * + * isize = the address range from 0 up to datastart. + * datasize = the address range from datastart up to dataend + * bsssize = the address range from dataend up to bssend. + */ + + loadinfo->entryoffs = ntohl(loadinfo->header.h_entry); + loadinfo->isize = datastart; + + loadinfo->datasize = dataend - datastart; + loadinfo->bsssize = bssend - dataend; + loadinfo->stacksize = ntohl(loadinfo->header.h_stacksize); + + /* This is the initial dspace size. We'll re-calculate this later + * after the memory has been allocated. + */ + + loadinfo->dsize = bssend - datastart; + + /* Get the offset to the start of the relocations (we'll relocate + * this later). + */ + + loadinfo->relocstart = ntohl(loadinfo->header.h_relocstart); + loadinfo->reloccount = ntohs(loadinfo->header.h_reloccount); + + return 0; +} + diff --git a/nuttx/binfmt/libelf/libelf_load.c b/nuttx/binfmt/libelf/libelf_load.c new file mode 100644 index 000000000..94d200b56 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_load.c @@ -0,0 +1,91 @@ +/**************************************************************************** + * binfmt/libelf/libelf_load.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 <sys/types.h> +#include <sys/mman.h> +#include <stdint.h> +#include <stdlib.h> +#include <elf.h> +#include <debug.h> +#include <errno.h> + +#include <arpa/inet.h> +#include <nuttx/elf.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +#ifndef MAX +#define MAX(x,y) ((x) > (y) ? (x) : (y)) +#endif + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_load + * + * Description: + * Loads the binary into memory, allocating memory, performing relocations + * and inializing the data and bss segments. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_load(FAR struct elf_loadinfo_s *loadinfo) +{ +# warning "Missing logic" + return -ENOSYS; +} + diff --git a/nuttx/binfmt/libelf/libelf_read.c b/nuttx/binfmt/libelf/libelf_read.c new file mode 100644 index 000000000..5f00a531e --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_read.c @@ -0,0 +1,165 @@ +/**************************************************************************** + * binfmt/libelf/libelf_read.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 <sys/types.h> +#include <stdint.h> +#include <unistd.h> +#include <string.h> +#include <elf.h> +#include <debug.h> +#include <errno.h> + +#include <arpa/inet.h> +#include <nuttx/elf.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +#undef ELF_DUMP_READDATA /* Define to dump all file data read */ +#define DUMPER lib_rawprintf /* If ELF_DUMP_READDATA is defined, this + * is the API used to dump data */ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_dumpreaddata + ****************************************************************************/ + +#if defined(ELF_DUMP_READDATA) +static inline void elf_dumpreaddata(char *buffer, int buflen) +{ + uint32_t *buf32 = (uint32_t*)buffer; + int i; + int j; + + for (i = 0; i < buflen; i += 32) + { + DUMPER("%04x:", i); + for (j = 0; j < 32; j += sizeof(uint32_t)) + { + DUMPER(" %08x", *buf32++); + } + DUMPER("\n"); + } +} +#else +# define elf_dumpreaddata(b,n) +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_read + * + * Description: + * Read 'readsize' bytes from the object file at 'offset' + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_read(struct elf_loadinfo_s *loadinfo, char *buffer, int readsize, int offset) +{ + ssize_t nbytes; /* Number of bytes read */ + off_t rpos; /* Position returned by lseek */ + char *bufptr; /* Next buffer location to read into */ + int bytesleft; /* Number of bytes of .data left to read */ + int bytesread; /* Total number of bytes read */ + + bvdbg("Read %d bytes from offset %d\n", readsize, offset); + + /* Seek to the position in the object file where the initialized + * data is saved. + */ + + bytesread = 0; + bufptr = buffer; + bytesleft = readsize; + do + { + rpos = lseek(loadinfo->filfd, offset, SEEK_SET); + if (rpos != offset) + { + bdbg("Failed to seek to position %d: %d\n", offset, errno); + return -errno; + } + + /* Read the file data at offset into the user buffer */ + + nbytes = read(loadinfo->filfd, bufptr, bytesleft); + if (nbytes < 0) + { + if (errno != EINTR) + { + bdbg("Read of .data failed: %d\n", errno); + return -errno; + } + } + else if (nbytes == 0) + { + bdbg("Unexpected end of file\n"); + return -ENODATA; + } + else + { + bytesread += nbytes; + bytesleft -= nbytes; + bufptr += nbytes; + offset += nbytes; + } + } + while (bytesread < readsize); + + elf_dumpreaddata(buffer, readsize); + return OK; +} + diff --git a/nuttx/binfmt/libelf/libelf_uninit.c b/nuttx/binfmt/libelf/libelf_uninit.c new file mode 100644 index 000000000..cd7ae7282 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_uninit.c @@ -0,0 +1,85 @@ +/**************************************************************************** + * binfmt/libelf/libelf_uninit.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 <unistd.h> +#include <debug.h> +#include <errno.h> +#include <nuttx/elf.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_uninit + * + * Description: + * Releases any resources committed by elf_init(). This essentially + * undoes the actions of elf_init. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_uninit(struct elf_loadinfo_s *loadinfo) +{ + if (loadinfo->filfd >= 0) + { + close(loadinfo->filfd); + } + + return OK; +} + diff --git a/nuttx/binfmt/libelf/libelf_unload.c b/nuttx/binfmt/libelf/libelf_unload.c new file mode 100644 index 000000000..9e930e295 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_unload.c @@ -0,0 +1,97 @@ +/**************************************************************************** + * binfmt/libelf/libelf_unload.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 <sys/mman.h> +#include <stdlib.h> +#include <debug.h> + +#include <nuttx/elf.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_unload + * + * Description: + * This function unloads the object from memory. This essentially + * undoes the actions of elf_load. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_unload(struct elf_loadinfo_s *loadinfo) +{ + /* Reset the contents of the info structure. */ + + /* Release the memory segments */ + + if (loadinfo->ispace) + { + kfree((void*)loadinfo->ispace, loadinfo->isize); + loadinfo->ispace = 0; + } + + if (loadinfo->dspace) + { + kfree((void*)loadinfo->dspace); + loadinfo->dspace = 0; + } + + return OK; +} + diff --git a/nuttx/binfmt/libelf/libelf_verify.c b/nuttx/binfmt/libelf/libelf_verify.c new file mode 100644 index 000000000..9e265573a --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_verify.c @@ -0,0 +1,88 @@ +/**************************************************************************** + * binfmt/libelf/elf_verify.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 <debug.h> +#include <errno.h> +#include <arpa/inet.h> +#include <nuttx/elf.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * 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(const struct elf_hdr_s *header) +{ + if (!header) + { + bdbg("NULL ELF header!"); + return -ENOEXEC; + } + +#warning "Missing Logic" + return -ENOSYS; +} + |