Thanks. Yes, that fixes it.

I also tried running the build script with CLANGDWARF, and it seems to have found some valid problems with Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c


/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:216:11: error: variable 'FileSize' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
      if (FileHandle != NULL) {
          ^~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:281:38: note: uninitialized use occurs here
  WriteBackDataCacheRange (FileData, FileSize);
                                     ^~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:216:7: note: remove the 'if' if its condition is always true
      if (FileHandle != NULL) {
      ^~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:179:9: error: variable 'FileSize' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
    if ((ShellCommandLineGetFlag (ParamPackage, L"-?")) ||
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:281:38: note: uninitialized use occurs here
  WriteBackDataCacheRange (FileData, FileSize);
                                     ^~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:179:5: note: remove the 'if' if its condition is always false
    if ((ShellCommandLineGetFlag (ParamPackage, L"-?")) ||
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:179:9: error: variable 'FileSize' is used uninitialized whenever '||' condition is true [-Werror,-Wsometimes-uninitialized]
    if ((ShellCommandLineGetFlag (ParamPackage, L"-?")) ||
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:281:38: note: uninitialized use occurs here
  WriteBackDataCacheRange (FileData, FileSize);
                                     ^~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:179:9: note: remove the '||' if its condition is always false
    if ((ShellCommandLineGetFlag (ParamPackage, L"-?")) ||
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:172:7: error: variable 'FileSize' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
  if (EFI_ERROR (Status)) {
      ^~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2/MdePkg/Include/Uefi/UefiBaseType.h:159:23: note: expanded from macro 'EFI_ERROR'
#define EFI_ERROR(A)  RETURN_ERROR(A)
                      ^~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2/MdePkg/Include/Base.h:1061:35: note: expanded from macro 'RETURN_ERROR'
#define RETURN_ERROR(StatusCode) (((INTN)(RETURN_STATUS)(StatusCode)) < 0)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:281:38: note: uninitialized use occurs here
  WriteBackDataCacheRange (FileData, FileSize);
                                     ^~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:172:3: note: remove the 'if' if its condition is always false
  if (EFI_ERROR (Status)) {
  ^~~~~~~~~~~~~~~~~~~~~~~~~
/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/RunAxf.c:136:39: note: initialize the variable 'FileSize' to silence this warning
  UINTN                       FileSize;
                                      ^
                                       = 0
4 errors generated.
make: *** [GNUmakefile:342: /home/bcran/src/uefi/Build/ArmJuno/RELEASE_CLANGDWARF/AARCH64/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/OUTPUT/RunAxf.obj] Error 1

--

Rebecca Cran



On 5/10/23 10:27, Ard Biesheuvel wrote:
Hi Rebecca,

On Wed, 10 May 2023 at 18:23, Rebecca Cran <rebe...@bsdio.com> wrote:
I ran my script that tries to build all Arm platforms in edk2-platforms
(with the exception of known broken ones) with the GCC5/GCC toolchain,
and noticed a new breakage since I last ran it a few months ago.

Building JunoPkg for ARM doesn't work.

I also noticed it passes both -march=armv7-a and -march=armv8-a.

This looks like a bug in the Juno package - if I grep for aarch64_bti
in edk2, every single hit is in a aarch64 specific source or header
file, but it is getting pulled into an ARM build.

Does the below help?

diff --git a/Platform/ARM/Library/ArmShellCmdRunAxf/Arm/Pivot.S
b/Platform/ARM/Library/ArmShellCmdRunAxf/Arm/Pivot.S
index 50efcfacdfe6..7d5eed94b25f 100644
--- a/Platform/ARM/Library/ArmShellCmdRunAxf/Arm/Pivot.S
+++ b/Platform/ARM/Library/ArmShellCmdRunAxf/Arm/Pivot.S
@@ -4,7 +4,7 @@
  //  SPDX-License-Identifier: BSD-2-Clause-Patent
  //

-#include <AsmMacroIoLibV8.h>
+#include <AsmMacroIoLib.h>

  // VOID
  // RunAxfPivot (



"arm-none-eabi-gcc" -march=armv7-a -mfloat-abi=soft -march=armv8-a -c -x
assembler -imacros AutoGen.h -mlittle-endian -o
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/OUTPUT/Arm/Pivot.obj
-I/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf/Arm
-I/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Library/ArmShellCmdRunAxf
-I/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/DEBUG
-I/home/bcran/src/uefi/edk2/ArmPkg
-I/home/bcran/src/uefi/edk2/ArmPkg/Include
-I/home/bcran/src/uefi/edk2/MdeModulePkg
-I/home/bcran/src/uefi/edk2/MdeModulePkg/Test/Mock/Include
-I/home/bcran/src/uefi/edk2/MdeModulePkg/Include
-I/home/bcran/src/uefi/edk2/MdePkg
-I/home/bcran/src/uefi/edk2/MdePkg/Include
-I/home/bcran/src/uefi/edk2/MdePkg/Test/UnitTest/Include
-I/home/bcran/src/uefi/edk2/MdePkg/Test/Mock/Include
-I/home/bcran/src/uefi/edk2/MdePkg/Include/Arm
-I/home/bcran/src/uefi/edk2-platforms/Platform/ARM
-I/home/bcran/src/uefi/edk2-platforms/Platform/ARM/Include
-I/home/bcran/src/uefi/edk2/ShellPkg
-I/home/bcran/src/uefi/edk2/ShellPkg/Include
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/OUTPUT/Arm/Pivot.iiii
Trim --trim-long --source-code -o
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe/OUTPUT/Arm/CopyMem.iiii
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe/OUTPUT/Arm/CopyMem.ii
Trim --trim-long --source-code -o
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib/OUTPUT/Arm/ctzsi2.iiii
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib/OUTPUT/Arm/ctzsi2.ii
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/OUTPUT/Arm/Pivot.iiii:
Assembler messages:
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/OUTPUT/Arm/Pivot.iiii:17:
Error: bad instruction `aarch64_bti(c)'
make: *** [GNUmakefile:363:
/home/bcran/src/uefi/Build/ArmJuno/RELEASE_GCC5/ARM/Platform/ARM/Library/ArmShellCmdRunAxf/ArmShellCmdRunAxf/OUTPUT/Arm/Pivot.obj]
Error 1


--
Rebecca Cran



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