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Updates to elftool.c's capabilities and structure

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master
Philippe Vachon 16 years ago
parent e4c03b7f4e
commit 9896709f6f
1 changed files with 176 additions and 61 deletions
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235
elftool/elftool.c
Unescape Escape View File

@ -9,6 +9,7 @@
*/
#include <elf.h>
#include <stdio.h>
#include <malloc.h>
/**
* swap functions - convert a header structure's endianess to the native
@ -59,75 +60,146 @@ void swap_elf32_program_header(struct elf32_phdr *phdr)
phdr->align = SWAP_32(phdr->align);
}
static char *e_types[] = {
[ELF_TYPE_NONE] = "No specified file type",
[ELF_TYPE_REL] = "Relocatable File",
[ELF_TYPE_EXEC] = "Executable File",
[ELF_TYPE_DYN] = "Dynamic Shared Object File",
[ELF_TYPE_CORE] = "Core File"
};
const char *file_type_to_string(uint16_t e_type)
{
if (e_type <= 4) {
return e_types[e_type];
} else {
return "Unknown or custom file type";
}
}
static char *e_machines[] = {
[ELF_MACH_NONE] = "Unknown/No Machine Type",
[ELF_MACH_M32] = "AT&T WE 32100",
[ELF_MACH_SPARC] = "Sun SPARC",
[ELF_MACH_386] = "Intel i386 (80386)",
[ELF_MACH_68K] = "Motorola 68000",
[ELF_MACH_88K] = "Motorola 88000",
[ELF_MACH_860] = "Intel i860 (80860)",
[ELF_MACH_MIPS] = "MIPS R3000 Big-Endian",
[0x9] = "IBM S/370",
[ELF_MACH_MIPS_R4K_BE] = "MIPS R4000 Big-Endian (Deprecated)",
[0xb] = "IBM RS/6000",
[0xc] = "Unknown",
[0xd] = "Unknown",
[0xe] = "Unknown",
[0xf] = "HP PA-RISC",
[0x10] = "Unknown",
[0x11] = "Fujitsu VPP500",
[0x12] = "Sun SPARC V.8+",
[0x13] = "Intel i960 (80960)",
[0x14] = "Cisco 4500 or IBM PowerPC",
[0x15] = "IBM PowerPC (64-bit)",
[0x16] = "IBM S/390",
[0x17] = "Unknown",
[0x18] = "Unknown",
[0x19] = "Cisco 7200 Series Router",
[0x1a] = "Unknown",
[0x1b] = "Unknown",
[0x1c] = "Unknown",
[0x1d] = "Unknown",
[0x1e] = "Cisco 3620/3640 Router (MIPS, IDT R4700)",
[0x1f] = "Unknown",
[0x20] = "Unknown",
[0x21] = "Unknown",
[0x22] = "Unknown",
[0x23] = "Unknown",
[0x24] = "Cisco 12000 Router or NEC V800",
[0x25] = "Fujitsu FR20",
[0x26] = "TRW RH-32",
[0x27] = "Motorola RCE",
[0x28] = "ARM",
[0x29] = "Digital Equipment Corporation Alpha",
[0x2a] = "Hitachi SuperH (SH)",
[0x2b] = "Cisco 2600 Series Router (PowerPC, MPC860) or SPARC V.9 64-bit",
[0x2c] = "Siemens Tricore Embedded Processor",
[0x2d] = "Argonaut RISC Core",
[0x2e] = "Hitachi H8/300",
[0x2f] = "Hitachi H8/300H",
[0x30] = "Hitachi H8S",
[0x31] = "Hitachi H8/500",
[0x32] = "Intel Itanium (Merced)",
[0x33] = "Cisco 1700 Series Router (PowerPC, MPC860) or Stanford MIPS-X",
[0x34] = "Cisco 3660 Series Router (MIPS, R5000) or Motorola Coldfire",
[0x35] = "Motorola M68HC12",
[0x36] = "Fujitsu MMA Multimedia Accelerator",
[0x37] = "Siemens PCP",
[0x38] = "Sony nCPU Embedded RISC",
[0x39] = "Denso NDR1 Microprocessor",
[0x3a] = "Motorola Star*Core Digital Signal Processor",
[0x3b] = "Toyota ME16 Microprocessor",
[0x3c] = "STMicroelectronics ST100 Microprocessor",
[0x3d] = "Advanced Logic Corp. TinyJ Embedded Family Microprocessor",
[0x3e] = "AMD x86-64/Intel EM64-T",
[0x3f] = "Sony DSP Processor",
[0x40] = "Unknown",
[0x41] = "Unknown",
[0x42] = "Siemens FX66 Microcontroller",
[0x43] = "STMicroelectronics ST9+ 8/16-bit Microcontroller",
[0x44] = "STMicroelectronics ST7 8-bit Microcontroller",
[0x45] = "Motorola MC68HC16 Microcontroller",
[0x46] = "Motorola MC68HC11 Microcontroller",
[0x47] = "Motorola MC68HC08 Microcontroller",
[0x48] = "Motorola MC68HC05 Microcontroller",
[0x49] = "Silicon Graphics SVx",
[0x4a] = "STMicroelectronics ST19 8-bit Microcontroller",
[0x4b] = "Digital Equipment Corporation VAX",
[0x4c] = "AXIS Communications 32-bit CRIS Processor",
[0x4d] = "Infineon Tech. 32-bit Embedded Javelin Processor",
[0x4e] = "Element 14 64-bit DSP",
[0x4f] = "LSI Logic 16-bit DSP",
[0x50] = "MMIX - Knuth's Educational 64-bit CPU",
[0x51] = "Harvard University Machine-Independent Object File",
[0x52] = "SiTera Prism",
[0x53] = "Atmel AVR 8-bit Microcontroller",
[0x54] = "Fujitsu FR30",
[0x55] = "Mitsubishi D10V",
[0x56] = "Mitsubishi D30V",
[0x57] = "NEC V850 CPU",
[0x58] = "Mitsubishi M32R",
[0x59] = "Matsushita MN10300",
[0x5a] = "Matsushita MN10200",
[0x5b] = "picoJava",
[0x5c] = "OpenRISC 32-bit Embedded Processor",
[0x5d] = "ARC Cores Tangent-A5",
[0x5e] = "Tensilica Xtensa Architecture",
[0x5f] = "Unknown",
[0x60] = "Unknown",
[0x61] = "Cisco 3725 Router (MIPS, RM7000)",
[0x62] = "Unknown",
[0x63] = "Unknown",
[0x64] = "Unknown",
[0x65] = "Unknown",
[0x66] = "Cisco 2691 Router (MIPS, R52xx)",
[0x67] = "Unknown",
[0x68] = "Unknown",
[0x69] = "Cisco 3745 Router (MIPS)"
};
/**
* Convert a e_machine code to a human-readable string, if it's a machine
* we are aware of. 0x0 through 0xa are specified as a part of the ELF
* specification, anything else has been found through experimentation or
* through other sources of such information.
*
* @param machine the e_machine code read from the ELF file.
* @return a string containing the machine type name.
*/
const char *machine_id_to_string(uint16_t machine)
{
switch (machine) {
case 0:
if (machine <= 0x69)
return e_machines[machine];
else
return "Unknown";
break;
case 1:
return "AT&T WE 32100";
break;
case 2:
return "SPARC";
break;
case 3:
return "Intel 80386";
break;
case 4:
return "Motorola 68000";
break;
case 5:
return "Motorola 88000";
break;
case 7:
return "Intel 80860";
break;
case 8:
return "MIPS R3000";
break;
case 10:
return "MIPS R4000";
break;
case 0x19:
/* note: can also be c6000 it would seem? */
return "Cisco 7200 Series Router (Big Endian)";
break;
case 0x1e:
return "Cisco 3620/40 Router (MIPS, IDT R4700, Big Endian)";
break;
case 0x24:
return "Cisco 12000 Series Router (MIPS/PowerPC, Big Endian)";
break;
case 0x2b:
return "Cisco 2600 Series Router (PowerPC, MPC860, Big Endian)";
break;
case 0x33:
return "Cisco 1700 Series Router (PowerPC, MPC860, Big Endian)";
break;
case 0x34:
return "Cisco 3660 Router (MIPS, R5000, Big Endian)";
break;
case 0x61:
return "Cisco 3725 Router (MIPS, Big Endian)";
break;
case 0x66:
return "Cisco 2691 Router (MIPS, Big Endian)";
break;
case 0x69:
return "Cisco 3745 Router (MIPS, Big Endian)";
break;
default:
return "Reserved";
}
}
/**
@ -258,11 +330,19 @@ int main(const int argc, const char *argv[])
fread(magic, 1, 4, fp);
if (magic[0] != ELF_MAGIC_1 || magic[1] != ELF_MAGIC_2 ||
if (magic[0] == 'M' && magic[1] == 'Z' && magic[2] == 'I' &&
magic[3] == 'P')
{
printf("Found MZIP file. This tool is unable to analyze MZIP files.\n");
fclose(fp);
return -1;
}
else if (magic[0] != ELF_MAGIC_1 || magic[1] != ELF_MAGIC_2 ||
magic[2] != ELF_MAGIC_3 || magic[3] != ELF_MAGIC_4)
{
printf("ELF magic number not found. Aborting.\n");
printf("Magic found: 0x%08x.\n", magic);
fclose(fp);
return -1;
}
@ -287,6 +367,8 @@ int main(const int argc, const char *argv[])
"Big endian" : "Little endian");
printf("\tVersion: %u\n\n", hdr.ident[ELF_INDEX_VERSION]);
printf("ELF Object Type: %s (%u)\n", file_type_to_string(hdr.type), hdr.type);
printf("Machine ID: %#4x\n\t%s\n", hdr.machine, machine_id_to_string(hdr.machine));
printf("Version: 0x%08x\n", hdr.version);
printf("Entry point: 0x%08x\n", hdr.entry);
@ -300,6 +382,34 @@ int main(const int argc, const char *argv[])
printf("Section Header Count: %u\n", hdr.shnum);
printf("String table entry index: %u\n\n", hdr.shstrndx);
char *strtabl = NULL;
if (hdr.shstrndx >= hdr.shnum) {
printf("Warning: String table specified in header is greater than "
"total number of \nsections.\n\n");
}
else
{
/* retrieve string table */
struct elf32_section_header strtab;
fseek(fp, hdr.shoff + (sizeof(struct elf32_section_header) *
hdr.shstrndx), SEEK_SET);
fread(&strtab, sizeof(struct elf32_section_header), 1, fp);
if (swap)
swap_elf32_section_header(&strtab);
/* check the sanity of the STRTAB section header */
if (strtab.type != ELF_SHT_STRTAB && strtab.type!= ELF_SHT_NULL) {
printf("Warning: String table specified in header is not a "
"SHT_STRTAB!\n\n");
} else if (strtab.type != ELF_SHT_NULL) {
fseek(fp, strtab.offset, SEEK_SET);
strtabl = (char *)malloc(strtab.size);
fread(strtabl, strtab.size, 1, fp);
}
}
/* now start looking at the ELF sections */
@ -328,7 +438,10 @@ int main(const int argc, const char *argv[])
}
printf("Section %d\n", i);
printf("\tName: %u\n", shdr.name);
printf("\tName: %s [%u]\n",
strtabl == NULL ? "unknown" :
strtabl[shdr.name] == '\0' ? "null" : &strtabl[shdr.name],
shdr.name);
printf("\tType: %s (0x%08x)\n", sh_type_to_string(shdr.type),
shdr.type);
printf("\tFlags: 0x%08x\n", shdr.flags);
@ -373,5 +486,7 @@ int main(const int argc, const char *argv[])
fclose(fp);
if (strtabl) free(strtabl);
return 0;
}

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