mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-09-09 23:54:32 +00:00
Small and modular dynamic link-editor.
This commit is contained in:
parent
d90f2d9824
commit
4f592bfc88
304
core/loader/cle.c
Normal file
304
core/loader/cle.c
Normal file
@ -0,0 +1,304 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2006, Swedish Institute of Computer Science
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
|
||||||
|
*
|
||||||
|
* @(#)$Id: cle.c,v 1.1 2006/12/01 15:12:27 bg- Exp $
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The Contiki dynamic Link Editor (CLE), ELF version.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "contiki.h"
|
||||||
|
|
||||||
|
#include "loader/cle.h"
|
||||||
|
#include "loader/elf32.h"
|
||||||
|
#include "loader/symtab.h"
|
||||||
|
|
||||||
|
#define NDEBUG
|
||||||
|
#include "lib/assert.h"
|
||||||
|
|
||||||
|
#ifdef NDEBUG
|
||||||
|
#define PRINTF(...) do {} while (0)
|
||||||
|
#else
|
||||||
|
#define PRINTF(...) printf(__VA_ARGS__)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Parse object file located at offset start reading data using function
|
||||||
|
* pread. Save what is useful in info.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
cle_read_info(struct cle_info *info,
|
||||||
|
int (*pread)(void *, int, off_t),
|
||||||
|
off_t start)
|
||||||
|
{
|
||||||
|
/*
|
||||||
|
* Save stackspace by using a union!
|
||||||
|
*
|
||||||
|
* Beware that the contents of ehdr is gone when shdr is written!!!
|
||||||
|
*/
|
||||||
|
union {
|
||||||
|
struct elf32_ehdr ehdr;
|
||||||
|
struct elf32_shdr shdr;
|
||||||
|
} huge;
|
||||||
|
#define ehdr huge.ehdr
|
||||||
|
#define shdr huge.shdr
|
||||||
|
|
||||||
|
off_t shdrptr;
|
||||||
|
cle_off strs;
|
||||||
|
cle_half shnum; /* number shdrs */
|
||||||
|
cle_half shentsize; /* sizeof shdr */
|
||||||
|
cle_word strtabsize = 0;
|
||||||
|
int i, ret;
|
||||||
|
|
||||||
|
memset(info, 0x0, sizeof(*info));
|
||||||
|
|
||||||
|
ret = pread(&ehdr, sizeof(ehdr), start);
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
/* Make sure that we have a correct and compatible ELF header. */
|
||||||
|
if(memcmp(ehdr.e_ident, ELF_MAGIC_HEADER, ELF_MAGIC_HEADER_SIZE) != 0) {
|
||||||
|
return CLE_BAD_HEADER;
|
||||||
|
}
|
||||||
|
|
||||||
|
shdrptr = ehdr.e_shoff;
|
||||||
|
shentsize = ehdr.e_shentsize;
|
||||||
|
shnum = ehdr.e_shnum;
|
||||||
|
|
||||||
|
/* The string table section: holds the names of the sections. */
|
||||||
|
ret = pread(&shdr, sizeof(shdr), start + shdrptr + shentsize*ehdr.e_shstrndx);
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
/* BEWARE THAT ehdr IS NOW OVERWRITTEN!!! */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Get a pointer to the actual table of strings. This table holds
|
||||||
|
* the names of the sections, not the names of other symbols in the
|
||||||
|
* file (these are in the symtab section).
|
||||||
|
*/
|
||||||
|
strs = shdr.sh_offset;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The ".text" segment holds the actual code from the ELF file, the
|
||||||
|
* ".data" segment contains initialized data, the ".bss" segment
|
||||||
|
* holds the size of the unitialized data segment. The ".rela.text"
|
||||||
|
* and ".rela.data" segments contains relocation information for the
|
||||||
|
* contents of the ".text" and ".data" segments, respectively. The
|
||||||
|
* ".symtab" segment contains the symbol table for this file. The
|
||||||
|
* ".strtab" segment points to the actual string names used by the
|
||||||
|
* symbol table.
|
||||||
|
*
|
||||||
|
* In addition to grabbing pointers to the relevant sections, we
|
||||||
|
* also save the section index for resolving addresses in the
|
||||||
|
* relocator code.
|
||||||
|
*/
|
||||||
|
for(i = 0; i < shnum; ++i) {
|
||||||
|
ret = pread(&shdr, sizeof(shdr), shdrptr);
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
/* The name of the section is contained in the strings table. */
|
||||||
|
ret = pread(info->name, sizeof(info->name), start + strs + shdr.sh_name);
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
if(strncmp(info->name, ".text", 5) == 0) {
|
||||||
|
info->textoff = shdr.sh_offset;
|
||||||
|
info->textsize = shdr.sh_size;
|
||||||
|
info->text_shndx = i;
|
||||||
|
} else if(strncmp(info->name, ".rela.text", 10) == 0) {
|
||||||
|
info->textrelaoff = shdr.sh_offset;
|
||||||
|
info->textrelasize = shdr.sh_size;
|
||||||
|
} else if(strncmp(info->name, ".data", 5) == 0) {
|
||||||
|
info->dataoff = shdr.sh_offset;
|
||||||
|
info->datasize = shdr.sh_size;
|
||||||
|
info->data_shndx = i;
|
||||||
|
} else if(strncmp(info->name, ".rela.data", 10) == 0) {
|
||||||
|
info->datarelaoff = shdr.sh_offset;
|
||||||
|
info->datarelasize = shdr.sh_size;
|
||||||
|
} else if(strncmp(info->name, ".symtab", 7) == 0) {
|
||||||
|
info->symtaboff = shdr.sh_offset;
|
||||||
|
info->symtabsize = shdr.sh_size;
|
||||||
|
} else if(strncmp(info->name, ".strtab", 7) == 0) {
|
||||||
|
info->strtaboff = shdr.sh_offset;
|
||||||
|
strtabsize = shdr.sh_size;
|
||||||
|
} else if(strncmp(info->name, ".bss", 4) == 0) {
|
||||||
|
info->bsssize = shdr.sh_size;
|
||||||
|
info->bss_shndx = i;
|
||||||
|
} else {
|
||||||
|
info->name[sizeof(info->name) - 1] = 0;
|
||||||
|
PRINTF("cle: unknown section %.12s\n", info->name);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Move on to the next section header. */
|
||||||
|
shdrptr += shentsize;
|
||||||
|
}
|
||||||
|
|
||||||
|
if(info->symtabsize == 0) {
|
||||||
|
return CLE_NO_SYMTAB;
|
||||||
|
}
|
||||||
|
if(strtabsize == 0) {
|
||||||
|
return CLE_NO_STRTAB;
|
||||||
|
}
|
||||||
|
if(info->textsize == 0) {
|
||||||
|
return CLE_NO_TEXT;
|
||||||
|
}
|
||||||
|
|
||||||
|
return CLE_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Update one reloc.
|
||||||
|
*
|
||||||
|
* Writing relocs is machine dependent and this function is MPS430
|
||||||
|
* specific!
|
||||||
|
*/
|
||||||
|
static inline int
|
||||||
|
cle_upd_reloc(cle_addr segmem, struct elf32_rela *rela, cle_addr addr)
|
||||||
|
{
|
||||||
|
memcpy(segmem + rela->r_offset, &addr, 2); /* Write reloc */
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Relocate one segment that has been copied to the location pointed
|
||||||
|
* to by segmem.
|
||||||
|
*
|
||||||
|
* Relocation info is read from offset reloff to (reloff + relsize)
|
||||||
|
* and the start of the object file is at start. Data is read using
|
||||||
|
* function pread.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
cle_relocate(struct cle_info *info,
|
||||||
|
int (*pread)(void *, int, off_t),
|
||||||
|
off_t start, /* Offset to start of file. */
|
||||||
|
cle_addr segmem, /* Where segment is stored in memory. */
|
||||||
|
cle_off reloff, /* .rela.<segment> start */
|
||||||
|
cle_word relsize) /* .rela.<segment> size */
|
||||||
|
{
|
||||||
|
struct elf32_rela rela;
|
||||||
|
struct elf32_sym s;
|
||||||
|
off_t off;
|
||||||
|
cle_addr addr;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
for(off = start + reloff;
|
||||||
|
off < start + reloff + relsize;
|
||||||
|
off += sizeof(struct elf32_rela)) {
|
||||||
|
ret = pread(&rela, sizeof(rela), off);
|
||||||
|
assert(ret > 0);
|
||||||
|
ret = pread(&s, sizeof(s),
|
||||||
|
start + info->symtaboff
|
||||||
|
+ sizeof(struct elf32_sym)*ELF32_R_SYM(rela.r_info));
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
if(s.st_shndx == info->bss_shndx) {
|
||||||
|
addr = info->bss;
|
||||||
|
} else if(s.st_shndx == info->data_shndx) {
|
||||||
|
addr = info->data;
|
||||||
|
} else if(s.st_shndx == info->text_shndx) {
|
||||||
|
addr = info->text;
|
||||||
|
} else {
|
||||||
|
addr = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if(s.st_name == 0) { /* No name, local symbol? */
|
||||||
|
if(addr == NULL) {
|
||||||
|
return CLE_UNKNOWN_SEGMENT;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
ret = pread(info->name, sizeof(info->name),
|
||||||
|
start + info->strtaboff + s.st_name);
|
||||||
|
assert(ret > 0);
|
||||||
|
cle_addr sym = symtab_lookup(info->name);
|
||||||
|
|
||||||
|
if(addr == NULL && sym != NULL) { /* Imported symbol. */
|
||||||
|
addr = sym;
|
||||||
|
} else if(addr != NULL && sym == NULL) { /* Exported symbol. */
|
||||||
|
addr = addr + s.st_value;
|
||||||
|
} else if(addr == NULL && sym == NULL) {
|
||||||
|
PRINTF("cle: undefined reference to %.32s\n", info->name);
|
||||||
|
return CLE_UNDEFINED; /* Or COMMON symbol. */
|
||||||
|
} else if(addr != NULL && sym != NULL) {
|
||||||
|
PRINTF("cle: multiple definitions of %.32s\n", info->name);
|
||||||
|
return CLE_MULTIPLY_DEFINED;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
addr += rela.r_addend;
|
||||||
|
|
||||||
|
cle_upd_reloc(segmem, &rela, addr);
|
||||||
|
}
|
||||||
|
return CLE_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Search object file located at offset start using function
|
||||||
|
* pread. Search for symbol named symbol and return its address after
|
||||||
|
* relocation or NULL on failure.
|
||||||
|
*/
|
||||||
|
void *
|
||||||
|
cle_lookup(struct cle_info *info,
|
||||||
|
int (*pread)(void *, int, off_t),
|
||||||
|
off_t start, /* Offset to start of file. */
|
||||||
|
const char *symbol)
|
||||||
|
|
||||||
|
{
|
||||||
|
struct elf32_sym s;
|
||||||
|
off_t a;
|
||||||
|
cle_addr addr;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
for(a = start + info->symtaboff;
|
||||||
|
a < start + info->symtaboff + info->symtabsize;
|
||||||
|
a += sizeof(s)) {
|
||||||
|
ret = pread(&s, sizeof(s), a);
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
if(s.st_name != 0) {
|
||||||
|
ret = pread(info->name, sizeof(info->name),
|
||||||
|
start + info->strtaboff + s.st_name);
|
||||||
|
assert(ret > 0);
|
||||||
|
|
||||||
|
if(strcmp(info->name, symbol) == 0) { /* Exported symbol found. */
|
||||||
|
if(s.st_shndx == info->bss_shndx) {
|
||||||
|
addr = info->bss;
|
||||||
|
} else if(s.st_shndx == info->data_shndx) {
|
||||||
|
addr = info->data;
|
||||||
|
} else if(s.st_shndx == info->text_shndx) {
|
||||||
|
addr = info->text;
|
||||||
|
} else {
|
||||||
|
return NULL; /* Really an error! */
|
||||||
|
}
|
||||||
|
return addr + s.st_value;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
97
core/loader/cle.h
Normal file
97
core/loader/cle.h
Normal file
@ -0,0 +1,97 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2006, Swedish Institute of Computer Science
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
|
||||||
|
*
|
||||||
|
* @(#)$Id: cle.h,v 1.1 2006/12/01 15:12:27 bg- Exp $
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef CLE_H
|
||||||
|
#define CLE_H
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The Contiki dynamic Link Editor (CLE) for small systems.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* These typedefs limits object file size! */
|
||||||
|
typedef u16_t cle_off; /* Offset from start of file. */
|
||||||
|
typedef u16_t cle_word;
|
||||||
|
typedef u16_t cle_half;
|
||||||
|
|
||||||
|
/* Also used for address arithmetic (can't be void *). */
|
||||||
|
typedef unsigned char *cle_addr;
|
||||||
|
/* typedef uintptr_t cle_addr; */
|
||||||
|
|
||||||
|
struct cle_info {
|
||||||
|
cle_addr text, data, bss;
|
||||||
|
|
||||||
|
cle_off textrelaoff, datarelaoff;
|
||||||
|
cle_word textrelasize, datarelasize;
|
||||||
|
|
||||||
|
cle_off textoff, dataoff;
|
||||||
|
cle_word textsize, datasize, bsssize;
|
||||||
|
|
||||||
|
cle_off symtaboff, strtaboff;
|
||||||
|
cle_word symtabsize;
|
||||||
|
|
||||||
|
unsigned char text_shndx;
|
||||||
|
unsigned char data_shndx;
|
||||||
|
unsigned char bss_shndx;
|
||||||
|
unsigned char unused_shndx;
|
||||||
|
|
||||||
|
char name[32]; /* Scratch and errmsg buffer. */
|
||||||
|
};
|
||||||
|
|
||||||
|
int
|
||||||
|
cle_read_info(struct cle_info *info,
|
||||||
|
int (*read)(void *, int, off_t),
|
||||||
|
off_t hdr); /* Offset to start of file. */
|
||||||
|
|
||||||
|
int
|
||||||
|
cle_relocate(struct cle_info *info,
|
||||||
|
int (*read)(void *, int, off_t),
|
||||||
|
off_t hdr, /* Offset to start of file. */
|
||||||
|
cle_addr segmem, /* Where segment is stored in memory. */
|
||||||
|
cle_off reloff, /* .rela.<segment> start */
|
||||||
|
cle_word relsize); /* .rela.<segment> size */
|
||||||
|
|
||||||
|
void *
|
||||||
|
cle_lookup(struct cle_info *info,
|
||||||
|
int (*read)(void *, int, off_t),
|
||||||
|
off_t hdr, /* Offset to start of file. */
|
||||||
|
const char *symbol);
|
||||||
|
|
||||||
|
#define CLE_OK 0
|
||||||
|
#define CLE_BAD_HEADER 1
|
||||||
|
#define CLE_NO_SYMTAB 2
|
||||||
|
#define CLE_NO_STRTAB 3
|
||||||
|
#define CLE_NO_TEXT 4
|
||||||
|
#define CLE_UNDEFINED 5
|
||||||
|
#define CLE_UNKNOWN_SEGMENT 6
|
||||||
|
|
||||||
|
#define CLE_MULTIPLY_DEFINED 20
|
||||||
|
|
||||||
|
#endif /* CLE_H */
|
130
core/loader/elf32.h
Normal file
130
core/loader/elf32.h
Normal file
@ -0,0 +1,130 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2006, Swedish Institute of Computer Science
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
|
||||||
|
*
|
||||||
|
* @(#)$Id: elf32.h,v 1.1 2006/12/01 15:12:27 bg- Exp $
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* @(#)$Id: elf32.h,v 1.1 2006/12/01 15:12:27 bg- Exp $ */
|
||||||
|
|
||||||
|
#ifndef ELF32_H
|
||||||
|
#define ELF32_H
|
||||||
|
|
||||||
|
/*
|
||||||
|
* ELF definitions common to all 32-bit architectures.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define EI_NIDENT 16
|
||||||
|
|
||||||
|
typedef unsigned long elf32_word;
|
||||||
|
typedef signed long elf32_sword;
|
||||||
|
typedef unsigned short elf32_half;
|
||||||
|
typedef unsigned long elf32_off;
|
||||||
|
typedef unsigned long elf32_addr;
|
||||||
|
|
||||||
|
struct elf32_ehdr {
|
||||||
|
unsigned char e_ident[EI_NIDENT]; /* ident bytes */
|
||||||
|
elf32_half e_type; /* file type */
|
||||||
|
elf32_half e_machine; /* target machine */
|
||||||
|
elf32_word e_version; /* file version */
|
||||||
|
elf32_addr e_entry; /* start address */
|
||||||
|
elf32_off e_phoff; /* phdr file offset */
|
||||||
|
elf32_off e_shoff; /* shdr file offset */
|
||||||
|
elf32_word e_flags; /* file flags */
|
||||||
|
elf32_half e_ehsize; /* sizeof ehdr */
|
||||||
|
elf32_half e_phentsize; /* sizeof phdr */
|
||||||
|
elf32_half e_phnum; /* number phdrs */
|
||||||
|
elf32_half e_shentsize; /* sizeof shdr */
|
||||||
|
elf32_half e_shnum; /* number shdrs */
|
||||||
|
elf32_half e_shstrndx; /* shdr string index */
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Values for e_type. */
|
||||||
|
#define ET_NONE 0 /* Unknown type. */
|
||||||
|
#define ET_REL 1 /* Relocatable. */
|
||||||
|
#define ET_EXEC 2 /* Executable. */
|
||||||
|
#define ET_DYN 3 /* Shared object. */
|
||||||
|
#define ET_CORE 4 /* Core file. */
|
||||||
|
|
||||||
|
struct elf32_shdr {
|
||||||
|
elf32_word sh_name; /* section name */
|
||||||
|
elf32_word sh_type; /* SHT_... */
|
||||||
|
elf32_word sh_flags; /* SHF_... */
|
||||||
|
elf32_addr sh_addr; /* virtual address */
|
||||||
|
elf32_off sh_offset; /* file offset */
|
||||||
|
elf32_word sh_size; /* section size */
|
||||||
|
elf32_word sh_link; /* misc info */
|
||||||
|
elf32_word sh_info; /* misc info */
|
||||||
|
elf32_word sh_addralign; /* memory alignment */
|
||||||
|
elf32_word sh_entsize; /* entry size if table */
|
||||||
|
};
|
||||||
|
|
||||||
|
/* sh_type */
|
||||||
|
#define SHT_NULL 0 /* inactive */
|
||||||
|
#define SHT_PROGBITS 1 /* program defined information */
|
||||||
|
#define SHT_SYMTAB 2 /* symbol table section */
|
||||||
|
#define SHT_STRTAB 3 /* string table section */
|
||||||
|
#define SHT_RELA 4 /* relocation section with addends*/
|
||||||
|
#define SHT_HASH 5 /* symbol hash table section */
|
||||||
|
#define SHT_DYNAMIC 6 /* dynamic section */
|
||||||
|
#define SHT_NOTE 7 /* note section */
|
||||||
|
#define SHT_NOBITS 8 /* no space section */
|
||||||
|
#define SHT_REL 9 /* relation section without addends */
|
||||||
|
#define SHT_SHLIB 10 /* reserved - purpose unknown */
|
||||||
|
#define SHT_DYNSYM 11 /* dynamic symbol table section */
|
||||||
|
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
|
||||||
|
#define SHT_HIPROC 0x7fffffff /* specific section header types */
|
||||||
|
#define SHT_LOUSER 0x80000000 /* reserved range for application */
|
||||||
|
#define SHT_HIUSER 0xffffffff /* specific indexes */
|
||||||
|
|
||||||
|
struct elf32_rel {
|
||||||
|
elf32_addr r_offset; /* Location to be relocated. */
|
||||||
|
elf32_word r_info; /* Relocation type and symbol index. */
|
||||||
|
};
|
||||||
|
|
||||||
|
struct elf32_rela {
|
||||||
|
elf32_addr r_offset; /* Location to be relocated. */
|
||||||
|
elf32_word r_info; /* Relocation type and symbol index. */
|
||||||
|
elf32_sword r_addend; /* Addend. */
|
||||||
|
};
|
||||||
|
|
||||||
|
struct elf32_sym {
|
||||||
|
elf32_word st_name; /* String table index of name. */
|
||||||
|
elf32_addr st_value; /* Symbol value. */
|
||||||
|
elf32_word st_size; /* Size of associated object. */
|
||||||
|
unsigned char st_info; /* Type and binding information. */
|
||||||
|
unsigned char st_other; /* Reserved (not used). */
|
||||||
|
elf32_half st_shndx; /* Section index of symbol. */
|
||||||
|
};
|
||||||
|
|
||||||
|
#define ELF32_R_SYM(info) ((info) >> 8)
|
||||||
|
#define ELF32_R_TYPE(info) ((unsigned char)(info))
|
||||||
|
|
||||||
|
#define ELF_MAGIC_HEADER "\177ELF\001\001\001"
|
||||||
|
#define ELF_MAGIC_HEADER_SIZE 7
|
||||||
|
|
||||||
|
#endif /* ELF32_H */
|
Loading…
Reference in New Issue
Block a user