mirror of
https://github.com/reactos/reactos.git
synced 2024-08-18 09:28:36 +00:00
166 lines
4.4 KiB
C
166 lines
4.4 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <typedefs.h>
|
|
#include <pecoff.h>
|
|
|
|
static
|
|
void
|
|
Usage(void)
|
|
{
|
|
printf("Converts a coff object file into a raw binary file.\n"
|
|
"Syntax: obj2bin <source file> <dest file> <base address>\n");
|
|
}
|
|
|
|
static
|
|
void
|
|
RelocateSection(
|
|
char *pData,
|
|
IMAGE_SECTION_HEADER *pSectionHeader,
|
|
PIMAGE_SYMBOL pSymbols,
|
|
unsigned int iOffset)
|
|
{
|
|
unsigned int i, nOffset;
|
|
PIMAGE_RELOCATION pReloc;
|
|
char *pSection;
|
|
WORD *p16;
|
|
DWORD *p32;
|
|
|
|
pSection = pData + pSectionHeader->PointerToRawData;
|
|
|
|
/* Calculate pointer to relocation table */
|
|
pReloc = (PIMAGE_RELOCATION)(pData + pSectionHeader->PointerToRelocations);
|
|
|
|
/* Loop all relocations */
|
|
for (i = 0; i < pSectionHeader->NumberOfRelocations; i++)
|
|
{
|
|
nOffset = pReloc->VirtualAddress - pSectionHeader->VirtualAddress;
|
|
|
|
if (nOffset > pSectionHeader->SizeOfRawData) continue;
|
|
|
|
switch (pReloc->Type)
|
|
{
|
|
case IMAGE_REL_I386_ABSOLUTE:
|
|
case 16:
|
|
p16 = (void*)(pSection + nOffset);
|
|
*p16 += (WORD)(pSymbols[pReloc->SymbolTableIndex].Value + iOffset);
|
|
break;
|
|
|
|
case IMAGE_REL_I386_DIR32:
|
|
p32 = (void*)(pSection + nOffset);
|
|
*p32 += (DWORD)(pSymbols[pReloc->SymbolTableIndex].Value + iOffset);
|
|
break;
|
|
|
|
default:
|
|
printf("Unknown relocation type %u, address 0x%x\n",
|
|
pReloc->Type, (unsigned)pReloc->VirtualAddress);
|
|
}
|
|
|
|
pReloc++;
|
|
}
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
char *pszSourceFile;
|
|
char *pszDestFile;
|
|
unsigned long nFileSize, nBaseAddress;
|
|
FILE *pSourceFile, *pDestFile;
|
|
IMAGE_FILE_HEADER *pFileHeader;
|
|
IMAGE_SECTION_HEADER *pSectionHeader;
|
|
unsigned int i;
|
|
char *pData;
|
|
PIMAGE_SYMBOL pSymbols;
|
|
|
|
if ((argc != 4) || (strcmp(argv[1], "--help") == 0))
|
|
{
|
|
Usage();
|
|
return -1;
|
|
}
|
|
|
|
pszSourceFile = argv[1];
|
|
pszDestFile = argv[2];
|
|
nBaseAddress = strtol(argv[3], 0, 16);
|
|
|
|
pSourceFile = fopen(pszSourceFile, "rb");
|
|
if (!pSourceFile)
|
|
{
|
|
fprintf(stderr, "Couldn't open source file '%s'\n", pszSourceFile);
|
|
return -2;
|
|
}
|
|
|
|
/* Get file size */
|
|
fseek(pSourceFile, 0, SEEK_END);
|
|
nFileSize = ftell(pSourceFile);
|
|
rewind(pSourceFile);
|
|
|
|
/* Allocate memory for the file */
|
|
pData = malloc(nFileSize);
|
|
if (!pData)
|
|
{
|
|
fclose(pSourceFile);
|
|
fprintf(stderr, "Failed to allocate %lu bytes\n", nFileSize);
|
|
return -3;
|
|
}
|
|
|
|
/* Read the whole source file */
|
|
if (!fread(pData, nFileSize, 1, pSourceFile))
|
|
{
|
|
free(pData);
|
|
fclose(pSourceFile);
|
|
fprintf(stderr, "Failed to read %lu bytes from source file\n", nFileSize);
|
|
return -4;
|
|
}
|
|
|
|
/* Close source file */
|
|
fclose(pSourceFile);
|
|
|
|
/* Open the destination file */
|
|
pDestFile = fopen(pszDestFile, "wb");
|
|
if (!pDestFile)
|
|
{
|
|
free(pData);
|
|
fprintf(stderr, "Couldn't open destination file '%s'\n", pszDestFile);
|
|
return -5;
|
|
}
|
|
|
|
/* Calculate table pointers */
|
|
pFileHeader = (IMAGE_FILE_HEADER*)pData;
|
|
pSymbols = (void*)(pData + pFileHeader->PointerToSymbolTable);
|
|
pSectionHeader = (void*)(((char*)(pFileHeader + 1)) + pFileHeader->SizeOfOptionalHeader);
|
|
|
|
/* Loop all sections */
|
|
for (i = 0; i < pFileHeader->NumberOfSections; i++)
|
|
{
|
|
/* Check if this is '.text' section */
|
|
if ((strcmp((char*)pSectionHeader->Name, ".text") == 0) &&
|
|
(pSectionHeader->SizeOfRawData != 0))
|
|
{
|
|
RelocateSection(pData,
|
|
pSectionHeader,
|
|
pSymbols,
|
|
nBaseAddress);
|
|
|
|
/* Write the section to the destination file */
|
|
if (!fwrite(pData + pSectionHeader->PointerToRawData,
|
|
pSectionHeader->SizeOfRawData, 1, pDestFile))
|
|
{
|
|
free(pData);
|
|
fclose(pDestFile);
|
|
fprintf(stderr, "Failed to write %u bytes to destination file\n",
|
|
(unsigned int)pSectionHeader->SizeOfRawData);
|
|
return -6;
|
|
}
|
|
|
|
nBaseAddress += pSectionHeader->SizeOfRawData;
|
|
}
|
|
|
|
pSectionHeader++;
|
|
}
|
|
|
|
free(pData);
|
|
fclose(pDestFile);
|
|
|
|
return 0;
|
|
}
|