mirror of https://github.com/ZDoom/gzdoom-gles.git
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/* fixrtext.c
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**
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** Given a coff-win32 object file, search for an .rtext section header and
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** set its IMAGE_SCN_MEM_WRITE flag if it isn't already set. This gets
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** around an NASM deficiency that prevents creating such files with
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** "execute read write" sections.
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**
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** The author of this program disclaims copyright.
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*/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <stdio.h>
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#ifndef _MSC_VER
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#include <errno.h>
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int fopen_s (FILE **pFile, const char *filename, const char *mode)
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{
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if ((*pFile = fopen (filename, mode)) == NULL)
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{
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return errno;
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}
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return 0;
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}
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#endif
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int main (int argc, char **argv)
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{
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FILE *f;
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IMAGE_FILE_HEADER filehead;
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IMAGE_SECTION_HEADER secthead;
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int i;
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if (argc != 2)
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return 1;
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if (fopen_s (&f, argv[1], "r+b"))
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{
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fprintf (stderr, "Could not open %s\n", argv[1]);
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return 1;
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}
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if (fread (&filehead, sizeof filehead, 1, f) != 1 ||
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filehead.Machine != IMAGE_FILE_MACHINE_I386)
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{
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fprintf (stderr, "%s is not an x86 object file\n", argv[1]);
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fclose (f);
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return 1;
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}
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for (i = 0; i < filehead.NumberOfSections; ++i)
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{
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if (fread (§head, sizeof secthead, 1, f) != 1)
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{
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fprintf (stderr, "Could not read section header %d\n", i + 1);
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fclose (f);
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return 1;
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}
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if (memcmp (secthead.Name, ".rtext\0", IMAGE_SIZEOF_SHORT_NAME) == 0)
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{
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if (secthead.Characteristics & IMAGE_SCN_MEM_WRITE)
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{
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fprintf (stderr, "The .rtext section in %s is already writeable\n", argv[1]);
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fclose (f);
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return 0;
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}
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secthead.Characteristics |= IMAGE_SCN_MEM_WRITE;
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if (fseek (f, -(long)sizeof secthead, SEEK_CUR))
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{
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fprintf (stderr, "Failed to seek back to start of .rtext section header\n");
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fclose (f);
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return 1;
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}
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if (fwrite (§head, sizeof secthead, 1, f) != 1)
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{
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fprintf (stderr, "Failed to rewrite .rtext section header\n");
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fclose (f);
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return 1;
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}
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/* fprintf (stderr, "The .rtext section in %s was successfully made writeable\n", argv[1]); */
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fclose (f);
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return 0;
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}
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}
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fclose (f);
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return 0;
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}
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