322 lines
10 KiB
C++
322 lines
10 KiB
C++
/*
|
|
* Australian Public Licence B (OZPLB)
|
|
*
|
|
* Version 1-0
|
|
*
|
|
* Copyright (c) 2004 University of New South Wales
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* Developed by: Operating Systems and Distributed Systems Group (DiSy)
|
|
* University of New South Wales
|
|
* http://www.disy.cse.unsw.edu.au
|
|
*
|
|
* Permission is granted by University of New South Wales, free of charge, to
|
|
* any person obtaining a copy of this software and any associated
|
|
* documentation files (the "Software") to deal with the Software without
|
|
* restriction, including (without limitation) the rights to use, copy,
|
|
* modify, adapt, merge, publish, distribute, communicate to the public,
|
|
* sublicense, and/or sell, lend or rent out copies of the Software, and
|
|
* to permit persons to whom the Software is furnished to do so, subject
|
|
* to the following conditions:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimers.
|
|
*
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimers in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* * Neither the name of University of New South Wales, nor the names of its
|
|
* contributors, may be used to endorse or promote products derived
|
|
* from this Software without specific prior written permission.
|
|
*
|
|
* EXCEPT AS EXPRESSLY STATED IN THIS LICENCE AND TO THE FULL EXTENT
|
|
* PERMITTED BY APPLICABLE LAW, THE SOFTWARE IS PROVIDED "AS-IS", AND
|
|
* NATIONAL ICT AUSTRALIA AND ITS CONTRIBUTORS MAKE NO REPRESENTATIONS,
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
|
|
* BUT NOT LIMITED TO ANY REPRESENTATIONS, WARRANTIES OR CONDITIONS
|
|
* REGARDING THE CONTENTS OR ACCURACY OF THE SOFTWARE, OR OF TITLE,
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT,
|
|
* THE ABSENCE OF LATENT OR OTHER DEFECTS, OR THE PRESENCE OR ABSENCE OF
|
|
* ERRORS, WHETHER OR NOT DISCOVERABLE.
|
|
*
|
|
* TO THE FULL EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
|
|
* NATIONAL ICT AUSTRALIA OR ITS CONTRIBUTORS BE LIABLE ON ANY LEGAL
|
|
* THEORY (INCLUDING, WITHOUT LIMITATION, IN AN ACTION OF CONTRACT,
|
|
* NEGLIGENCE OR OTHERWISE) FOR ANY CLAIM, LOSS, DAMAGES OR OTHER
|
|
* LIABILITY, INCLUDING (WITHOUT LIMITATION) LOSS OF PRODUCTION OR
|
|
* OPERATION TIME, LOSS, DAMAGE OR CORRUPTION OF DATA OR RECORDS; OR LOSS
|
|
* OF ANTICIPATED SAVINGS, OPPORTUNITY, REVENUE, PROFIT OR GOODWILL, OR
|
|
* OTHER ECONOMIC LOSS; OR ANY SPECIAL, INCIDENTAL, INDIRECT,
|
|
* CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES, ARISING OUT OF OR IN
|
|
* CONNECTION WITH THIS LICENCE, THE SOFTWARE OR THE USE OF OR OTHER
|
|
* DEALINGS WITH THE SOFTWARE, EVEN IF NATIONAL ICT AUSTRALIA OR ITS
|
|
* CONTRIBUTORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH CLAIM, LOSS,
|
|
* DAMAGES OR OTHER LIABILITY.
|
|
*
|
|
* If applicable legislation implies representations, warranties, or
|
|
* conditions, or imposes obligations or liability on University of New South
|
|
* Wales or one of its contributors in respect of the Software that
|
|
* cannot be wholly or partly excluded, restricted or modified, the
|
|
* liability of University of New South Wales or the contributor is limited, to
|
|
* the full extent permitted by the applicable legislation, at its
|
|
* option, to:
|
|
* a. in the case of goods, any one or more of the following:
|
|
* i. the replacement of the goods or the supply of equivalent goods;
|
|
* ii. the repair of the goods;
|
|
* iii. the payment of the cost of replacing the goods or of acquiring
|
|
* equivalent goods;
|
|
* iv. the payment of the cost of having the goods repaired; or
|
|
* b. in the case of services:
|
|
* i. the supplying of the services again; or
|
|
* ii. the payment of the cost of having the services supplied again.
|
|
*
|
|
* The construction, validity and performance of this licence is governed
|
|
* by the laws in force in New South Wales, Australia.
|
|
*/
|
|
#include "elf.h"
|
|
#include <string.h>
|
|
|
|
int
|
|
elf64_checkFile(void *elfFile)
|
|
{
|
|
struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
|
|
if (fileHdr->e_ident[EI_MAG0] != ELFMAG0
|
|
|| fileHdr->e_ident[EI_MAG1] != ELFMAG1
|
|
|| fileHdr->e_ident[EI_MAG2] != ELFMAG2
|
|
|| fileHdr->e_ident[EI_MAG3] != ELFMAG3)
|
|
return -1; /* not an elf file */
|
|
if (fileHdr->e_ident[EI_CLASS] != ELFCLASS64)
|
|
return -2; /* not 64-bit file */
|
|
#if 0
|
|
if (fileHdr->e_ident[EI_DATA] != ELFDATA2LSB)
|
|
return -3; /* not big-endian file */
|
|
if (fileHdr->e_ident[EI_VERSION] != 1)
|
|
return -4; /* wrong version of elf */
|
|
if (fileHdr->e_machine != 8)
|
|
return -5; /* wrong architecture (not MIPS) */
|
|
if (fileHdr->e_type != 2)
|
|
return -6; /* not an executable program */
|
|
if (fileHdr->e_phentsize != sizeof(struct Elf64_Phdr))
|
|
return -7; /* unexpected size of program segment
|
|
* header */
|
|
if (fileHdr->e_phnum == 0)
|
|
return -8; /* no program segments */
|
|
if ((fileHdr->e_flags & 0x7e) != 0)
|
|
return -9; /* wrong flags (did you forgot to compile
|
|
* with -mno-abicalls?) */
|
|
#endif
|
|
return 0; /* elf file looks OK */
|
|
}
|
|
|
|
struct Elf64_Phdr *
|
|
elf64_getProgramSegmentTable(void *elfFile)
|
|
/*
|
|
* Returns a pointer to the program segment table, which is an array of
|
|
* ELF64_Phdr_t structs. The size of the array can be found by calling
|
|
* getNumProgramSegments.
|
|
*/
|
|
{
|
|
struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
|
|
return (struct Elf64_Phdr *) ((size_t)fileHdr->e_phoff + (size_t) elfFile);
|
|
}
|
|
|
|
unsigned
|
|
elf64_getNumSections(void *elfFile)
|
|
/*
|
|
* Returns the number of program segments in this elf file.
|
|
*/
|
|
{
|
|
struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
|
|
return fileHdr->e_shnum;
|
|
}
|
|
|
|
char *
|
|
elf64_getStringTable(void *elfFile, int string_segment)
|
|
{
|
|
struct Elf64_Shdr *sections = elf64_getSectionTable((Elf64_Header*)elfFile);
|
|
return (char *) elfFile + sections[string_segment].sh_offset;
|
|
}
|
|
|
|
char *
|
|
elf64_getSegmentStringTable(void *elfFile)
|
|
{
|
|
struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
|
|
if (fileHdr->e_shstrndx == 0) {
|
|
return NULL;
|
|
} else {
|
|
return elf64_getStringTable(elfFile, fileHdr->e_shstrndx);
|
|
}
|
|
}
|
|
|
|
char *
|
|
elf64_getSectionName(void *elfFile, int i)
|
|
{
|
|
struct Elf64_Shdr *sections = elf64_getSectionTable((Elf64_Header*)elfFile);
|
|
char *str_table = elf64_getSegmentStringTable((Elf64_Header*)elfFile);
|
|
if (str_table == NULL) {
|
|
return (char*)"<corrupted>";
|
|
} else {
|
|
return str_table + sections[i].sh_name;
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
elf64_getSectionSize(void *elfFile, int i)
|
|
{
|
|
struct Elf64_Shdr *sections = elf64_getSectionTable((Elf64_Header*)elfFile);
|
|
return sections[i].sh_size;
|
|
}
|
|
|
|
uint64_t
|
|
elf64_getSectionAddr(struct Elf64_Header *elfFile, int i)
|
|
{
|
|
struct Elf64_Shdr *sections = elf64_getSectionTable(elfFile);
|
|
return sections[i].sh_addr;
|
|
}
|
|
|
|
void *
|
|
elf64_getSection(void *elfFile, int i)
|
|
{
|
|
struct Elf64_Shdr *sections = elf64_getSectionTable((Elf64_Header*)elfFile);
|
|
return (char *)elfFile + sections[i].sh_offset;
|
|
}
|
|
|
|
void *
|
|
elf64_getSectionNamed(void *elfFile, char *str)
|
|
{
|
|
int numSections = elf64_getNumSections(elfFile);
|
|
int i;
|
|
for (i = 0; i < numSections; i++) {
|
|
if (strcmp(str, elf64_getSectionName(elfFile, i)) == 0) {
|
|
return elf64_getSection(elfFile, i);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
uint16_t
|
|
elf64_getNumProgramHeaders(struct Elf64_Header *elfFile)
|
|
{
|
|
return elfFile->e_phnum;
|
|
}
|
|
|
|
int
|
|
elf64_getSegmentType (void *elfFile, int segment)
|
|
{
|
|
return elf64_getProgramSegmentTable(elfFile)[segment].p_type;
|
|
}
|
|
|
|
void
|
|
elf64_getSegmentInfo(void *elfFile, int segment, uint64_t *p_vaddr,
|
|
uint64_t *p_paddr, uint64_t *p_filesz, uint64_t *p_offset,
|
|
uint64_t *p_memsz)
|
|
{
|
|
struct Elf64_Phdr *segments;
|
|
|
|
segments = elf64_getProgramSegmentTable(elfFile);
|
|
*p_vaddr = segments[segment].p_vaddr;
|
|
*p_paddr = segments[segment].p_paddr;
|
|
*p_filesz = segments[segment].p_filesz;
|
|
*p_offset = segments[segment].p_offset;
|
|
*p_memsz = segments[segment].p_memsz;
|
|
}
|
|
|
|
uint64_t
|
|
elf64_getEntryPoint (struct Elf64_Header *elfFile)
|
|
{
|
|
return elfFile->e_entry;
|
|
}
|
|
|
|
/*
|
|
* Debugging functions
|
|
*/
|
|
|
|
#if 0
|
|
/*
|
|
* prints out some details of one elf file
|
|
*/
|
|
void
|
|
elf64_showDetails(void *elfFile, int size, char *name)
|
|
{
|
|
struct Elf64_Phdr *segments;
|
|
unsigned numSegments;
|
|
struct Elf64_Shdr *sections;
|
|
unsigned numSections;
|
|
int i,
|
|
r;
|
|
char *str_table;
|
|
|
|
printf("Found an elf64 file called \"%s\" located "
|
|
"at address 0x%lx\n", name, elfFile);
|
|
|
|
if ((r = elf64_checkFile(elfFile)) != 0) {
|
|
char *magic = elfFile;
|
|
printf("Invalid elf file (%d)\n", r);
|
|
printf("Magic is: %02.2hhx %02.2hhx %02.2hhx %02.2hhx\n",
|
|
magic[0], magic[1], magic[2], magic[3]);
|
|
return;
|
|
}
|
|
|
|
str_table = elf64_getSegmentStringTable(elfFile);
|
|
|
|
printf("Got str_table... %p\n", str_table);
|
|
|
|
/*
|
|
* get a pointer to the table of program segments
|
|
*/
|
|
segments = elf64_getProgramSegmentTable(elfFile);
|
|
numSegments = elf64_getNumProgramSegments(elfFile);
|
|
|
|
sections = elf64_getSectionTable(elfFile);
|
|
numSections = elf64_getNumSections(elfFile);
|
|
|
|
if ((void *) sections > (void *) elfFile + size ||
|
|
(((uintptr_t) sections & 0xf) != 0)) {
|
|
printf("Corrupted elfFile..\n");
|
|
return;
|
|
}
|
|
printf("Sections: %p\n", sections);
|
|
/*
|
|
* print out info about each section
|
|
*/
|
|
|
|
|
|
/*
|
|
* print out info about each program segment
|
|
*/
|
|
printf("Program Headers:\n");
|
|
printf(" Type Offset VirtAddr PhysAddr "
|
|
"FileSiz MemSiz Flg Align\n");
|
|
for (i = 0; i < numSegments; i++) {
|
|
|
|
if (segments[i].p_type != 1) {
|
|
printf("segment %d is not loadable, "
|
|
"skipping\n", i);
|
|
} else {
|
|
printf(" LOAD 0x%06lx 0x%08lx 0x%08lx"
|
|
" 0x%05lx 0x%05lx %c%c%c 0x%04lx\n",
|
|
segments[i].p_offset, segments[i].p_vaddr,
|
|
segments[i].p_vaddr,
|
|
segments[i].p_filesz, segments[i].p_memsz,
|
|
segments[i].p_flags & PF_R ? 'R' : ' ',
|
|
segments[i].p_flags & PF_W ? 'W' : ' ',
|
|
segments[i].p_flags & PF_X ? 'E' : ' ',
|
|
segments[i].p_align);
|
|
}
|
|
}
|
|
|
|
printf("Section Headers:\n");
|
|
printf(" [Nr] Name Type Addr Off\n");
|
|
for (i = 0; i < numSections; i++) {
|
|
if (elf_checkSection(elfFile, i) == 0) {
|
|
printf("%-17.17s %-15.15s %08x %06x\n", elf64_getSectionName(elfFile, i), " " /* sections[i].sh_type
|
|
*/ ,
|
|
sections[i].sh_addr, sections[i].sh_offset);
|
|
}
|
|
}
|
|
}
|
|
#endif
|