mirror of
https://github.com/reactos/reactos.git
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117 lines
3.6 KiB
C
117 lines
3.6 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 main(int argc, char* argv[])
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{
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int i;
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PSYMBOLFILE_HEADER SymbolFileHeader;
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PIMAGE_DOS_HEADER PEDosHeader;
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PIMAGE_FILE_HEADER PEFileHeader;
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PIMAGE_OPTIONAL_HEADER PEOptHeader;
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PIMAGE_SECTION_HEADER PESectionHeaders;
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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 (3 != argc)
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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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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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PEDosHeader = (PIMAGE_DOS_HEADER) FileData;
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if (PEDosHeader->e_magic != IMAGE_DOS_MAGIC || PEDosHeader->e_lfanew == 0L)
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{
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/* Ignore elf */
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if (!memcmp(PEDosHeader, 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 PE file header */
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/* sizeof(ULONG) = sizeof(MAGIC) */
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PEFileHeader = (PIMAGE_FILE_HEADER)((char *) FileData + PEDosHeader->e_lfanew + sizeof(ULONG));
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/* Locate optional header */
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assert(sizeof(ULONG) == 4);
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PEOptHeader = (PIMAGE_OPTIONAL_HEADER)(PEFileHeader + 1);
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/* Locate PE section headers */
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PESectionHeaders = (PIMAGE_SECTION_HEADER)((char *) PEOptHeader + PEFileHeader->SizeOfOptionalHeader);
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for (i = 0; i < PEFileHeader->NumberOfSections; i++) {
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if (PESectionHeaders[i].Name[0] == '/') {
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PESectionHeaders[i].Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA;
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PESectionHeaders[i].Characteristics &= ~(IMAGE_SCN_MEM_PURGEABLE | IMAGE_SCN_MEM_DISCARDABLE);
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}
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}
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PESectionHeaders[PEFileHeader->NumberOfSections-1].SizeOfRawData =
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FileSize - PESectionHeaders[PEFileHeader->NumberOfSections-1].PointerToRawData;
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if (PESectionHeaders[PEFileHeader->NumberOfSections-1].SizeOfRawData >
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PESectionHeaders[PEFileHeader->NumberOfSections-1].Misc.VirtualSize) {
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PESectionHeaders[PEFileHeader->NumberOfSections-1].Misc.VirtualSize =
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ROUND_UP(PESectionHeaders[PEFileHeader->NumberOfSections-1].SizeOfRawData,
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PEOptHeader->SectionAlignment);
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PEOptHeader->SizeOfImage = PESectionHeaders[PEFileHeader->NumberOfSections-1].VirtualAddress + PESectionHeaders[PEFileHeader->NumberOfSections-1].Misc.VirtualSize;
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}
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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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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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