MinGW-w64 - for 32 and 64 bit Windows / Bugs / #831 Overlapping import tables with executable built with mingw-w64-gcc 9.3

r0q - 2020-04-07

It seems like the overlapping import table parts are caused by strip. But without strip the resulting executable also imports CryptAcquireContextA & CryptGenRandom from SDL2.dll, which fails.

Best regards
Dennis

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r0q - 2020-04-07

This seems to stem from the fact that the SDL2.dll was compiled with a different compiler. When I build all with the same, it works fine. Bug can be closed I guess.

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jpa - 2020-06-25

In my opinion this is a real and important bug. It makes it impossible to use many third-party libraries with mingw-w64-gcc 9.3.

I have attached a minimal test case that tries to link against Ximea's xiapi32.dll. When compiled with i686-w64-mingw32-gcc (GCC) 7.3-win32 20180312, the import table is as follows and executable works fine:
DLL Name: xiapi32.dll
vma: Hint/Ord Member-Name Bound-To
64f4 368 xiStopAcquisition

When compiled with i686-w64-mingw32-gcc (GCC) 9.3-win32 20200320, the import table is as follows and the executable silently fails to execute on Windows 10 and crashes on wine:
DLL Name: xiapi32.dll
vma: Hint/Ord Member-Name Bound-To
64c4 368 xiStopAcquisition
61ec 2 AcquireSRWLockExclusive
6206 277 DeleteCriticalSection
621e 310 EnterCriticalSection
6236 543 GetCurrentProcess
624a 544 GetCurrentProcessId
6260 548 GetCurrentThreadId
6276 617 GetLastError
6286 729 GetStartupInfoA
6298 755 GetSystemTimeAsFileTime
62b2 786 GetTickCount
62c2 877 InitializeCriticalSection
62de 973 LeaveCriticalSection
62f6 1118 QueryPerformanceCounter
6310 1370 SetUnhandledExceptionFilter
632e 1386 Sleep
6336 1401 TerminateProcess
634a 1421 TlsGetValue
6358 1435 UnhandledExceptionFilter
6374 1469 VirtualProtect
6386 1472 VirtualQuery

The imports from KERNEL32.dll are leaking into the import table for other DLLs.

With more complex executables, in addition to silent crashes this also causes error messages like "The procedure entry point AcquireSRWLockExclusive could not be located in the dynamic link library ... foo.exe".

mingw-bug-831.tar.gz

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jpa - 2020-06-25

Thanks to Martin Storsjö / wbs on IRC for some hints:

problem is probably in binutils, related to bugs like https://sourceware.org/bugzilla/show_bug.cgi?id=25374

workaround is to link against "foobar.dll" instead of "foobar.lib"
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- Kai Tietz - 2020-06-26
  
  That seems to me like a change to linker-script on binutils. The
  import/export tables are binutils related. Gcc doesn't produce them
  at all. As I suspected that nothing like LTO tries to be clever here,
  that issue should be solvable by the linker script, which should make
  sure that last element of table is NULL.
  
  Regards,
  Kai
  
  Am Do., 25. Juni 2020 um 10:52 Uhr schrieb jpa jpa-@users.sourceforge.net:
  
  Thanks to Martin Storsjö / wbs on IRC for some hints:
  
  problem is probably in binutils, related to bugs like https://sourceware.org/bugzilla/show_bug.cgi?id=25374
  workaround is to link against "foobar.dll" instead of "foobar.lib"
  
  [bugs:#831] Overlapping import tables with executable built with mingw-w64-gcc 9.3
  
  Status: open
  Group: v1.0 (example)
  Created: Tue Apr 07, 2020 08:29 AM UTC by r0q
  Last Updated: Thu Jun 25, 2020 08:37 AM UTC
  Owner: nobody
  
  mingw-w64 gcc 9.3 built executable ends up with overlapping import tables:
  
  Import Table size: 00001fc8
  offset 00240a00 libcurl.dll
  Hint/Name Table: 0043712C
  TimeDateStamp: 00000000 (Thu Jan 1 01:00:00 1970)
  ForwarderChain: 00000000
  First thunk RVA: 00437598
  Thunk Ordn Name
  00437598 345 curl_easy_cleanup
  0043759c 347 curl_easy_escape
  004375a0 349 curl_easy_init
  004375a4 351 curl_easy_perform
  004375a8 355 curl_easy_setopt
  004375ac 363 curl_free
  004375b0 367 curl_global_init
  004375b4 411 curl_share_init
  004375b8 412 curl_share_setopt
  004375bc 414 curl_slist_append
  004375c0 425 curl_version_info
  
  offset 00240a14 libfreetype.dll
  Hint/Name Table: 0043715C
  TimeDateStamp: 00000000 (Thu Jan 1 01:00:00 1970)
  ForwarderChain: 00000000
  First thunk RVA: 004375C8
  Thunk Ordn Name
  004375c8 35 FT_Done_Face
  004375cc 36 FT_Done_FreeType
  004375d0 60 FT_Get_Char_Index
  004375d4 69 FT_Get_Kerning
  004375d8 108 FT_Init_FreeType
  004375dc 112 FT_Library_Version
  004375e0 120 FT_Load_Char
  004375e4 121 FT_Load_Glyph
  004375e8 127 FT_New_Face
  004375ec 173 FT_Set_Pixel_Sizes
  
  offset 00240a28 libopusfile.dll
  Hint/Name Table: 00437188
  TimeDateStamp: 00000000 (Thu Jan 1 01:00:00 1970)
  ForwarderChain: 00000000
  First thunk RVA: 004375F4
  Thunk Ordn Name
  004375f4 3 op_channel_count
  004375f8 14 op_open_memory
  004375fc 18 op_pcm_total
  00437600 22 op_read
  
  offset 00240a3c SDL2.dll
  Hint/Name Table: 004371A0
  TimeDateStamp: 00000000 (Thu Jan 1 01:00:00 1970)
  ForwarderChain: 00000000
  First thunk RVA: 0043760C
  Thunk Ordn Name
  0043760c 94 SDL_GL_DeleteContext
  00437610 107 SDL_GL_SwapWindow
  00437614 106 SDL_GL_SetSwapInterval
  00437618 99 SDL_GL_GetDrawableSize
  0043761c 103 SDL_GL_MakeCurrent
  00437620 93 SDL_GL_CreateContext
  00437624 96 SDL_GL_GetAttribute
  00437628 105 SDL_GL_SetAttribute
  0043762c 71 SDL_DestroyWindow
  00437630 539 SDL_SetWindowGrab
  00437634 537 SDL_SetWindowFullscreen
  00437638 389 SDL_MinimizeWindow
  0043763c 557 SDL_ShowWindow
  00437640 533 SDL_SetWindowBordered
  00437644 550 SDL_SetWindowSize
  00437648 547 SDL_SetWindowPosition
  0043764c 238 SDL_GetWindowFlags
  00437650 57 SDL_CreateWindow
  00437654 236 SDL_GetWindowDisplayIndex
  00437658 157 SDL_GetCurrentDisplayMode
  0043765c 162 SDL_GetDesktopDisplayMode
  00437660 165 SDL_GetDisplayMode
  00437664 187 SDL_GetNumDisplayModes
  00437668 163 SDL_GetDisplayBounds
  0043766c 191 SDL_GetNumVideoDisplays
  00437670 231 SDL_GetVersion
  00437674 251 SDL_GetWindowWMInfo
  00437678 628 SDL_free
  0043767c 518 SDL_SetRelativeMouseMode
  00437680 203 SDL_GetRelativeMouseState
  00437684 183 SDL_GetMouseState
  00437688 560 SDL_StopTextInput
  0043768c 559 SDL_StartTextInput
  00437690 179 SDL_GetKeyboardState
  00437694 312 SDL_JoystickClose
  00437698 318 SDL_JoystickGetAxis
  0043769c 314 SDL_JoystickEventState
  004376a0 342 SDL_JoystickNumAxes
  004376a4 346 SDL_JoystickOpen
  004376a8 511 SDL_SetHint
  004376ac 409 SDL_PollEvent
  004376b0 26 SDL_ClearError
  004376b4 169 SDL_GetError
  004376b8 153 SDL_GetClipboardText
  004376bc 506 SDL_SetClipboardText
  004376c0 30 SDL_CloseAudioDevice
  004376c4 406 SDL_PauseAudioDevice
  004376c8 404 SDL_OpenAudioDevice
  004376cc 156 SDL_GetCurrentAudioDriver
  004376d0 414 SDL_Quit
  004376d4 594 SDL_WasInit
  004376d8 415 SDL_QuitSubSystem
  004376dc 303 SDL_InitSubSystem
  004376e0 302 SDL_Init
  004376e4 1177 CryptAcquireContextA
  004376e8 1194 CryptGenRandom
  
  offset 00240a50 ADVAPI32.dll
  Hint/Name Table: 00437278
  TimeDateStamp: 00000000 (Thu Jan 1 01:00:00 1970)
  ForwarderChain: 00000000
  First thunk RVA: 004376E4
  Thunk Ordn Name
  004376e4 1177 CryptAcquireContextA
  004376e8 1194 CryptGenRandom
  
  CryptAcquireContextA & CryptGenRandom are looked for in ADVAPI32.dll & SDL2.dll. They should only come from ADVAPI32.dll. The thunks have the same address. With GCC 9.2 this recently worked fine, will try to verify if a downgrade helps.
  
  Affected executable is contained in https://ddnet.tw/downloads/DDNet-13.0-win64.zip
  
  Source code that was built is https://github.com/ddnet/ddnet
  
  Best regards
  Dennis
  
  Sent from sourceforge.net because you indicated interest in https://sourceforge.net/p/mingw-w64/bugs/831/
  
  To unsubscribe from further messages, please visit https://sourceforge.net/auth/subscriptions/
  
  Related
  
  Bugs: #831
  
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Martin Storsjö - 2021-09-28

It seems like this was a regression in binutils 2.34, that was fixed again in binutils 2.35.

The commit that caused the breakage was this one: https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=90d92a632aaf75ce698335efeb383ddf785c12d8

The issue was resolved later by this commit: https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=5e365e474b7561318ddb1a107f05cf0c002e8284

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