reactos/sdk/tools/rsym/rsym.cmake.c

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/*
* Usage: rsym input-file output-file
*
* There are two sources of information: the .stab/.stabstr
* sections of the executable and the COFF symbol table. Most
* of the information is in the .stab/.stabstr sections.
* However, most of our asm files don't contain .stab directives,
* so routines implemented in assembler won't show up in the
* .stab section. They are present in the COFF symbol table.
* So, we mostly use the .stab/.stabstr sections, but we augment
* the info there with info from the COFF symbol table when
* possible.
*
* This is a tool and is compiled using the host compiler,
* i.e. on Linux gcc and not mingw-gcc (cross-compiler).
* Therefore we can't include SDK headers and we have to
* duplicate some definitions here.
* Also note that the internal functions are "old C-style",
* returning an int, where a return of 0 means success and
* non-zero is failure.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "rsym.h"
int
IsDebugSection(PIMAGE_SECTION_HEADER Section)
{
/* This is a hack, but works for us */
return (Section->Name[0] == '/');
}
int main(int argc, char* argv[])
{
unsigned int i;
PSYMBOLFILE_HEADER SymbolFileHeader;
PIMAGE_NT_HEADERS NtHeaders;
PIMAGE_DOS_HEADER DosHeader;
PIMAGE_FILE_HEADER FileHeader;
PIMAGE_OPTIONAL_HEADER OptionalHeader;
PIMAGE_SECTION_HEADER SectionHeaders, LastSection;
char* path1;
char* path2;
FILE* out;
size_t FileSize;
void *FileData;
char elfhdr[] = { '\377', 'E', 'L', 'F' };
if (argc != 3)
{
fprintf(stderr, "Usage: rsym <exefile> <symfile>\n");
exit(1);
}
path1 = convert_path(argv[1]);
path2 = convert_path(argv[2]);
/* Load the input file into memory */
FileData = load_file( path1, &FileSize);
if ( !FileData )
{
fprintf(stderr, "An error occured loading '%s'\n", path1);
exit(1);
}
/* Check if MZ header exists */
DosHeader = (PIMAGE_DOS_HEADER) FileData;
if (DosHeader->e_magic != IMAGE_DOS_MAGIC || DosHeader->e_lfanew == 0L)
{
/* Ignore elf */
if (!memcmp(DosHeader, elfhdr, sizeof(elfhdr)))
exit(0);
perror("Input file is not a PE image.\n");
free(FileData);
exit(1);
}
/* Locate the headers */
NtHeaders = (PIMAGE_NT_HEADERS)((char*)FileData + DosHeader->e_lfanew);
FileHeader = &NtHeaders->FileHeader;
OptionalHeader = &NtHeaders->OptionalHeader;
/* Locate PE section headers */
SectionHeaders = (PIMAGE_SECTION_HEADER)((char*)OptionalHeader +
FileHeader->SizeOfOptionalHeader);
/* Loop all sections */
for (i = 0; i < FileHeader->NumberOfSections; i++)
{
/* Check if this is a debug section */
if (IsDebugSection(&SectionHeaders[i]))
{
/* Make sure we have the correct characteristics */
SectionHeaders[i].Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA;
SectionHeaders[i].Characteristics &= ~(IMAGE_SCN_MEM_PURGEABLE | IMAGE_SCN_MEM_DISCARDABLE);
}
}
/* Get a pointer to the last section header */
LastSection = &SectionHeaders[FileHeader->NumberOfSections - 1];
/* Set the size of the last section to cover the rest of the PE */
LastSection->SizeOfRawData = FileSize - LastSection->PointerToRawData;
/* Check if the virtual section size is smaller than the raw data */
if (LastSection->Misc.VirtualSize < LastSection->SizeOfRawData)
{
/* Make sure the virtual size of the section cover the raw data */
LastSection->Misc.VirtualSize = ROUND_UP(LastSection->SizeOfRawData,
OptionalHeader->SectionAlignment);
/* Fix up image size */
OptionalHeader->SizeOfImage = LastSection->VirtualAddress +
LastSection->Misc.VirtualSize;
}
/* Open the output file */
out = fopen(path2, "wb");
if (out == NULL)
{
perror("Cannot open output file");
free(FileData);
exit(1);
}
/* Write the output file */
fwrite(FileData, 1, FileSize, out);
fclose(out);
free(FileData);
return 0;
}
/* EOF */