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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