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