On Thu, 12 Dec 2024, Martin Storsjö wrote:
On Thu, 12 Dec 2024, Johannes Khoshnazar-Thoma wrote:
Hi Martin, Hi List,
/home/johannes/mingw-build-binutils/sysroot/bin/x86_64-w64-mingw32-objdump:
ntoskrnl.exe: file format not recognized
[...]
while most sections work:
ntoskrnl.exe: file format pe-x86-64
[...]
ntoskrnl.exe: file format pei-x86-64
[...]
(Those aren't "sections", those are archive members, i.e. inividual files.)
You didn't really specify what command you tried to execute here, and for
what purpose - so you're really having me guess the intent here.
I didn't have a copy of wdmsec.lib handy myself, but now I do. I tried
"x86_64-w64-mingw32-objdump -h wdmsec.lib" and found such errors.
Extracting the static archive to look at it closer, where multiple archive
members have the exact same file name, is a bit tricky, but I have a hacked
llvm-ar that extracts them with unique names.
It seems like binutils does recognize some of the short import library files,
but not others.
See https://martin.st/temp/ntoskrnl.exe-779 and
https://martin.st/temp/ntoskrnl.exe-780 for two such extracted files.
$ llvm-readobj ntoskrnl.exe-779 ntoskrnl.exe-780
File: ntoskrnl.exe-779
Format: COFF-import-file-x86-64
Type: code
Name type: name
Export name: IoFastQueryNetworkAttributes
Symbol: __imp_IoFastQueryNetworkAttributes
Symbol: IoFastQueryNetworkAttributes
File: ntoskrnl.exe-780
Format: COFF-import-file-x86-64
Type: const
Name type: name
Export name: IoFileObjectType
Symbol: __imp_IoFileObjectType
Symbol: IoFileObjectType
Two generally quite similar import objects.
$ x86_64-w64-mingw32-objdump -h ntoskrnl.exe-779 ntoskrnl.exe-780
ntoskrnl.exe-779: file format pei-x86-64
Sections:
Idx Name Size VMA LMA File off Algn
0 .idata$4 00000008 0000000000000000 0000000000000000 00000000
2**2
CONTENTS, ALLOC, LOAD, RELOC
1 .idata$5 00000008 0000000000000000 0000000000000000 00000000
2**2
CONTENTS, ALLOC, LOAD, RELOC
2 .idata$6 00000020 0000000000000000 0000000000000000 00000000
2**2
CONTENTS, ALLOC, LOAD
3 .text 00000008 0000000000000000 0000000000000000 00000000
2**2
CONTENTS, ALLOC, LOAD, RELOC, CODE
x86_64-w64-mingw32-objdump: ntoskrnl.exe-780: file format not recognized
So apparently binutils doesn't recognize all of them; perhaps the variant
"Type: const" isn't recognized? I guess it'd be possible to improve this
aspect in binutils too.
https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=c2fe3b5642e94b6fc2f2a19e54b7d9f447c8a151
is pushed now, which should silence the warnings from tools about those
import objects.
// Martin
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