Pelles C forum

Pelles C => Bug reports => Topic started by: iZzz32 on December 07, 2011, 11:49:11 PM

Title: POCC produces invalid MS COFF files (yet another minor bug)
Post by: iZzz32 on December 07, 2011, 11:49:11 PM

Microsoft PE and COFF Specification (http://msdn.microsoft.com/en-us/windows/hardware/gg463119.aspx) says that the VirtualSize field of the section header “is valid only for executable images and should be set to zero for object files”. However Pelles C leaves random trash in this field. Here’s a simple test:

Code: [Select]

static int foo; // It needs to be static to disable so called “tentative” definition.

int bar(void) {
  return foo * 2 + 1;
}

Quote from: pocc /c test.c && podump /HEADERS test.obj

…cut…
SECTION #2
    .bss name
      18 virtual size
       0 virtual address
       4 size of raw data
       0 offset to raw data
       0 offset to relocation table
       0 offset to line numbers
       0 number of relocations
       0 number of line numbers
…cut…

Microsoft C compiler behaves as per specification. However the value of this field seems to be ignored by both MS link.exe and Pelles polink.exe.

It is Pelles ISO C Compiler, Version 6.50.35 (Pelles C 6.50 RC4) on Windows XP SP3 (32-bit).

PS: IIRC Pelles C 6.00 didn’t have this bug. If someone has that version installed please confiirm.