[Bug ld/4210] New: PE-COFF can't handle holes between sections

[hjl at lucon dot org]

When a file is converted from ELF to PE-COFF, there may be holes between
sections due to different alignment. But _bfd_XXi_swap_aouthdr_out in
peXXigen.c doesn't take into this into account when computing size of
image. It just sums sizes of all sections.

bash-3.1$ cat image_size.s
        .text
        .global _start
_start:
        .byte 1
        .global data
        .data
data:
        .byte 2
bash-3.1$ cat image_size.t
SECTIONS
{
  . = SIZEOF_HEADERS;
  . = ALIGN(__section_alignment__);
  .text  __image_base__ + ( __section_alignment__ < 0x1000 ? . :
__section_alignment__ ) :
  {
    *(.text)
  }
  . = . + 0x1000;
  .data BLOCK(__section_alignment__) :
  {
    *(.data)
  }
  /DISCARD/ : { *(.*) }
}
bash-3.1$ make dump
./as   -o image_size.o image_size.s
./ld -T image_size.t -o image_size image_size.o
./objdump -ph image_size

image_size:     file format pei-i386

Characteristics 0x307
        relocations stripped
        executable
        line numbers stripped
        32 bit words
        debugging information removed

Time/Date               Sat Mar 17 14:35:34 2007

ImageBase               0000000000400000
SectionAlignment        0000000000001000
FileAlignment           0000000000000200
MajorOSystemVersion     4
MinorOSystemVersion     0
MajorImageVersion       1
MinorImageVersion       0
MajorSubsystemVersion   4
MinorSubsystemVersion   0
Win32Version            00000000
SizeOfImage             00003000
SizeOfHeaders           00000200
CheckSum                0000b553
Subsystem               00000003        (Windows CUI)
DllCharacteristics      00000000

...

Sections:
Idx Name          Size      VMA               LMA               File off  Algn
  0 .text         00000010  0000000000401000  0000000000401000  00000200  2**4
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .data         00000010  0000000000403000  0000000000403000  00000400  2**4
                  CONTENTS, ALLOC, LOAD, DATA

As it is shown, the size of image is > 00003000. But SizeOfImage is set
to 00003000.

-- 
           Summary: PE-COFF can't handle holes between sections
           Product: binutils
           Version: 2.18 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: hjl at lucon dot org
                CC: bug-binutils at gnu dot org
GCC target triplet: i386-pc-mingw32


http://sourceware.org/bugzilla/show_bug.cgi?id=4210

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