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Leslie Zhai via llvm-dev

2017-Nov-13 03:32 UTC

[llvm-dev] How to objcopy via LLVM toolchain for armv7e-m ELF32LE?

Hi LLVM developers,

As PR35281 mentioned:

$ llvm-objcopy -O binary llvm-cortex-m7.elf llvm-cortex-m7.bin
llvm-objcopy: 'llvm-cortex-m7.elf': The file was not recognized as a 
valid object file.


if (ELFObjectFile<ELF64LE> *o = 
dyn_cast<ELFObjectFile<ELF64LE>>(&Binary)) 
https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-objcopy/llvm-objcopy.cpp#L200


Please give me some hints about objcopy armv7e-m ELF32LE via LLVM 
toolchain, thanks a lot!

-- 
Regards,
Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/

Leslie Zhai via llvm-dev

2017-Nov-13 06:14 UTC

head link

[llvm-dev] How to objcopy via LLVM toolchain for armv7e-m ELF32LE?

Is it able to just workaround add ELF32LE?


diff --git a/tools/llvm-objcopy/llvm-objcopy.cpp 
b/tools/llvm-objcopy/llvm-objcopy.cpp
index 54186f6..3234c65 100644
--- a/tools/llvm-objcopy/llvm-objcopy.cpp
+++ b/tools/llvm-objcopy/llvm-objcopy.cpp
@@ -138,18 +138,19 @@ void SplitDWOToFile(const ELFObjectFile<ELFT> 
&ObjFile, StringRef File) {
    WriteObjectFile(DWOFile, File);
  }

-void CopyBinary(const ELFObjectFile<ELF64LE> &ObjFile) {
-  std::unique_ptr<Object<ELF64LE>> Obj;
+template <class ELFT = ELF64LE>
+void CopyBinary(const ELFObjectFile<ELFT> &ObjFile) {
+  std::unique_ptr<Object<ELFT>> Obj;

    if (!OutputFormat.empty() && OutputFormat != "binary")
      error("invalid output format '" + OutputFormat +
"'");
    if (!OutputFormat.empty() && OutputFormat == "binary")
-    Obj = llvm::make_unique<BinaryObject<ELF64LE>>(ObjFile);
+    Obj = llvm::make_unique<BinaryObject<ELFT>>(ObjFile);
    else
-    Obj = llvm::make_unique<ELFObject<ELF64LE>>(ObjFile);
+    Obj = llvm::make_unique<ELFObject<ELFT>>(ObjFile);

    if (!SplitDWO.empty())
-    SplitDWOToFile<ELF64LE>(ObjFile, SplitDWO.getValue());
+    SplitDWOToFile<ELFT>(ObjFile, SplitDWO.getValue());

    SectionPred RemovePred = [](const SectionBase &) { return false; };

@@ -200,6 +201,9 @@ int main(int argc, char **argv) {
    if (ELFObjectFile<ELF64LE> *o = 
dyn_cast<ELFObjectFile<ELF64LE>>(&Binary)) {
      CopyBinary(*o);
      return 0;
+  } else if (ELFObjectFile<ELF32LE> *o = 
dyn_cast<ELFObjectFile<ELF32LE>>(&Binary)) {
+    CopyBinary(*o);
+    return 0;
    }
    reportError(InputFilename, object_error::invalid_file_type);
  }



在 2017年11月13日 11:32, Leslie Zhai 写道:> Hi LLVM developers,
>
> As PR35281 mentioned:
>
> $ llvm-objcopy -O binary llvm-cortex-m7.elf llvm-cortex-m7.bin
> llvm-objcopy: 'llvm-cortex-m7.elf': The file was not recognized as
a
> valid object file.
>
>
> if (ELFObjectFile<ELF64LE> *o = 
> dyn_cast<ELFObjectFile<ELF64LE>>(&Binary)) 
>
https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-objcopy/llvm-objcopy.cpp#L200
>
>
> Please give me some hints about objcopy armv7e-m ELF32LE via LLVM 
> toolchain, thanks a lot!
>
-- 
Regards,
Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/

Leslie Zhai via llvm-dev

2017-Nov-13 07:00 UTC

head link

[llvm-dev] How to objcopy via LLVM toolchain for armv7e-m ELF32LE?

Testcase: 
https://github.com/xiangzhai/mini-arm-os/tree/llvm-toolchain/00-HelloWorld

$ make
  CC hello.c
  CC startup.c
  LD hello.elf
  READ -> hello.rd
  LIST -> hello.lst
  COPY -> hello.bin
    text    data     bss     dec     hex filename
     190      14       0     204      cc hello.elf

$ make qemu
/data/project/qemu_stm32/arm-softmmu/qemu-system-arm -M stm32-p103 
-nographic -kernel hello.bin

...
LED Off
Hello World!


在 2017年11月13日 14:14, Leslie Zhai 写道:> Is it able to just workaround add ELF32LE?
>
>
> diff --git a/tools/llvm-objcopy/llvm-objcopy.cpp 
> b/tools/llvm-objcopy/llvm-objcopy.cpp
> index 54186f6..3234c65 100644
> --- a/tools/llvm-objcopy/llvm-objcopy.cpp
> +++ b/tools/llvm-objcopy/llvm-objcopy.cpp
> @@ -138,18 +138,19 @@ void SplitDWOToFile(const ELFObjectFile<ELFT> 
> &ObjFile, StringRef File) {
>    WriteObjectFile(DWOFile, File);
>  }
>
> -void CopyBinary(const ELFObjectFile<ELF64LE> &ObjFile) {
> -  std::unique_ptr<Object<ELF64LE>> Obj;
> +template <class ELFT = ELF64LE>
> +void CopyBinary(const ELFObjectFile<ELFT> &ObjFile) {
> +  std::unique_ptr<Object<ELFT>> Obj;
>
>    if (!OutputFormat.empty() && OutputFormat != "binary")
>      error("invalid output format '" + OutputFormat +
"'");
>    if (!OutputFormat.empty() && OutputFormat == "binary")
> -    Obj = llvm::make_unique<BinaryObject<ELF64LE>>(ObjFile);
> +    Obj = llvm::make_unique<BinaryObject<ELFT>>(ObjFile);
>    else
> -    Obj = llvm::make_unique<ELFObject<ELF64LE>>(ObjFile);
> +    Obj = llvm::make_unique<ELFObject<ELFT>>(ObjFile);
>
>    if (!SplitDWO.empty())
> -    SplitDWOToFile<ELF64LE>(ObjFile, SplitDWO.getValue());
> +    SplitDWOToFile<ELFT>(ObjFile, SplitDWO.getValue());
>
>    SectionPred RemovePred = [](const SectionBase &) { return false; };
>
> @@ -200,6 +201,9 @@ int main(int argc, char **argv) {
>    if (ELFObjectFile<ELF64LE> *o = 
> dyn_cast<ELFObjectFile<ELF64LE>>(&Binary)) {
>      CopyBinary(*o);
>      return 0;
> +  } else if (ELFObjectFile<ELF32LE> *o = 
> dyn_cast<ELFObjectFile<ELF32LE>>(&Binary)) {
> +    CopyBinary(*o);
> +    return 0;
>    }
>    reportError(InputFilename, object_error::invalid_file_type);
>  }
>
>
>
> 在 2017年11月13日 11:32, Leslie Zhai 写道:
>> Hi LLVM developers,
>>
>> As PR35281 mentioned:
>>
>> $ llvm-objcopy -O binary llvm-cortex-m7.elf llvm-cortex-m7.bin
>> llvm-objcopy: 'llvm-cortex-m7.elf': The file was not recognized
as a
>> valid object file.
>>
>>
>> if (ELFObjectFile<ELF64LE> *o = 
>> dyn_cast<ELFObjectFile<ELF64LE>>(&Binary)) 
>>
https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-objcopy/llvm-objcopy.cpp#L200
>>
>>
>> Please give me some hints about objcopy armv7e-m ELF32LE via LLVM 
>> toolchain, thanks a lot!
>>
>
-- 
Regards,
Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/

James Henderson via llvm-dev

2017-Nov-13 14:27 UTC

head link

[llvm-dev] How to objcopy via LLVM toolchain for armv7e-m ELF32LE?

Hi,

At the moment, we've only added support for 64-bit Little Endian ELF to
llvm-objcopy, but I'm pretty sure most of the code should be able to handle
32-bit ELF as well, with a patch such as the one you've attached. Jake
Ehrlich (CC'ed), who is the main developer on llvm-objcopy should be able
to give you a more complete answer.

Regards,

James

On 13 November 2017 at 07:00, Leslie Zhai via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Testcase: https://github.com/xiangzhai/mini-arm-os/tree/llvm-toolchain
> /00-HelloWorld
>
> $ make
>  CC hello.c
>  CC startup.c
>  LD hello.elf
>  READ -> hello.rd
>  LIST -> hello.lst
>  COPY -> hello.bin
>    text    data     bss     dec     hex filename
>     190      14       0     204      cc hello.elf
>
> $ make qemu
> /data/project/qemu_stm32/arm-softmmu/qemu-system-arm -M stm32-p103
> -nographic -kernel hello.bin
>
> ...
> LED Off
> Hello World!
>
>
> 在 2017年11月13日 14:14, Leslie Zhai 写道:
>
>> Is it able to just workaround add ELF32LE?
>>
>>
>> diff --git a/tools/llvm-objcopy/llvm-objcopy.cpp
>> b/tools/llvm-objcopy/llvm-objcopy.cpp
>> index 54186f6..3234c65 100644
>> --- a/tools/llvm-objcopy/llvm-objcopy.cpp
>> +++ b/tools/llvm-objcopy/llvm-objcopy.cpp
>> @@ -138,18 +138,19 @@ void SplitDWOToFile(const
ELFObjectFile<ELFT>
>> &ObjFile, StringRef File) {
>>    WriteObjectFile(DWOFile, File);
>>  }
>>
>> -void CopyBinary(const ELFObjectFile<ELF64LE> &ObjFile) {
>> -  std::unique_ptr<Object<ELF64LE>> Obj;
>> +template <class ELFT = ELF64LE>
>> +void CopyBinary(const ELFObjectFile<ELFT> &ObjFile) {
>> +  std::unique_ptr<Object<ELFT>> Obj;
>>
>>    if (!OutputFormat.empty() && OutputFormat !=
"binary")
>>      error("invalid output format '" + OutputFormat +
"'");
>>    if (!OutputFormat.empty() && OutputFormat ==
"binary")
>> -    Obj =
llvm::make_unique<BinaryObject<ELF64LE>>(ObjFile);
>> +    Obj = llvm::make_unique<BinaryObject<ELFT>>(ObjFile);
>>    else
>> -    Obj = llvm::make_unique<ELFObject<ELF64LE>>(ObjFile);
>> +    Obj = llvm::make_unique<ELFObject<ELFT>>(ObjFile);
>>
>>    if (!SplitDWO.empty())
>> -    SplitDWOToFile<ELF64LE>(ObjFile, SplitDWO.getValue());
>> +    SplitDWOToFile<ELFT>(ObjFile, SplitDWO.getValue());
>>
>>    SectionPred RemovePred = [](const SectionBase &) { return false;
};
>>
>> @@ -200,6 +201,9 @@ int main(int argc, char **argv) {
>>    if (ELFObjectFile<ELF64LE> *o =
dyn_cast<ELFObjectFile<ELF64LE>>(&Binary))
>> {
>>      CopyBinary(*o);
>>      return 0;
>> +  } else if (ELFObjectFile<ELF32LE> *o =
dyn_cast<ELFObjectFile<ELF32LE>>(&Binary))
>> {
>> +    CopyBinary(*o);
>> +    return 0;
>>    }
>>    reportError(InputFilename, object_error::invalid_file_type);
>>  }
>>
>>
>>
>> 在 2017年11月13日 11:32, Leslie Zhai 写道:
>>
>>> Hi LLVM developers,
>>>
>>> As PR35281 mentioned:
>>>
>>> $ llvm-objcopy -O binary llvm-cortex-m7.elf llvm-cortex-m7.bin
>>> llvm-objcopy: 'llvm-cortex-m7.elf': The file was not
recognized as a
>>> valid object file.
>>>
>>>
>>> if (ELFObjectFile<ELF64LE> *o =
dyn_cast<ELFObjectFile<ELF64LE>>(&Binary))
>>> https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-
>>> objcopy/llvm-objcopy.cpp#L200
>>>
>>>
>>> Please give me some hints about objcopy armv7e-m ELF32LE via LLVM
>>> toolchain, thanks a lot!
>>>
>>>
>>
> --
> Regards,
> Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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Leslie Zhai via llvm-dev

2017-Nov-14 02:07 UTC

head link

[llvm-dev] How to objcopy via LLVM toolchain for armv7e-m ELF32LE?

Hi James,

Thanks for your kind response!

Jake has already provided the great patch 
https://reviews.llvm.org/D39977 The Flash Man :) so quick response to 
cover ARMmbed usecase for armv7e-m!

Thanks again for your great job!


在 2017年11月13日 22:27, James Henderson 写道:> Hi,
>
> At the moment, we've only added support for 64-bit Little Endian ELF 
> to llvm-objcopy, but I'm pretty sure most of the code should be able 
> to handle 32-bit ELF as well, with a patch such as the one you've 
> attached. Jake Ehrlich (CC'ed), who is the main developer on 
> llvm-objcopy should be able to give you a more complete answer.
>
> Regards,
>
> James
>
> On 13 November 2017 at 07:00, Leslie Zhai via llvm-dev 
> <llvm-dev at lists.llvm.org <mailto:llvm-dev at
lists.llvm.org>> wrote:
>
>     Testcase:
>    
https://github.com/xiangzhai/mini-arm-os/tree/llvm-toolchain/00-HelloWorld
>    
<https://github.com/xiangzhai/mini-arm-os/tree/llvm-toolchain/00-HelloWorld>
>
>     $ make
>      CC hello.c
>      CC startup.c
>      LD hello.elf
>      READ -> hello.rd
>      LIST -> hello.lst
>      COPY -> hello.bin
>        text    data     bss     dec     hex filename
>         190      14       0     204      cc hello.elf
>
>     $ make qemu
>     /data/project/qemu_stm32/arm-softmmu/qemu-system-arm -M stm32-p103
>     -nographic -kernel hello.bin
>
>     ...
>     LED Off
>     Hello World!
>
>
>     在 2017年11月13日 14:14, Leslie Zhai 写道:
>
>         Is it able to just workaround add ELF32LE?
>
>
>         diff --git a/tools/llvm-objcopy/llvm-objcopy.cpp
>         b/tools/llvm-objcopy/llvm-objcopy.cpp
>         index 54186f6..3234c65 100644
>         --- a/tools/llvm-objcopy/llvm-objcopy.cpp
>         +++ b/tools/llvm-objcopy/llvm-objcopy.cpp
>         @@ -138,18 +138,19 @@ void SplitDWOToFile(const
>         ELFObjectFile<ELFT> &ObjFile, StringRef File) {
>            WriteObjectFile(DWOFile, File);
>          }
>
>         -void CopyBinary(const ELFObjectFile<ELF64LE> &ObjFile) {
>         -  std::unique_ptr<Object<ELF64LE>> Obj;
>         +template <class ELFT = ELF64LE>
>         +void CopyBinary(const ELFObjectFile<ELFT> &ObjFile) {
>         +  std::unique_ptr<Object<ELFT>> Obj;
>
>            if (!OutputFormat.empty() && OutputFormat !=
"binary")
>              error("invalid output format '" + OutputFormat +
"'");
>            if (!OutputFormat.empty() && OutputFormat ==
"binary")
>         -    Obj =
llvm::make_unique<BinaryObject<ELF64LE>>(ObjFile);
>         +    Obj =
llvm::make_unique<BinaryObject<ELFT>>(ObjFile);
>            else
>         -    Obj =
llvm::make_unique<ELFObject<ELF64LE>>(ObjFile);
>         +    Obj = llvm::make_unique<ELFObject<ELFT>>(ObjFile);
>
>            if (!SplitDWO.empty())
>         -    SplitDWOToFile<ELF64LE>(ObjFile, SplitDWO.getValue());
>         +    SplitDWOToFile<ELFT>(ObjFile, SplitDWO.getValue());
>
>            SectionPred RemovePred = [](const SectionBase &) { return
>         false; };
>
>         @@ -200,6 +201,9 @@ int main(int argc, char **argv) {
>            if (ELFObjectFile<ELF64LE> *o >        
dyn_cast<ELFObjectFile<ELF64LE>>(&Binary)) {
>              CopyBinary(*o);
>              return 0;
>         +  } else if (ELFObjectFile<ELF32LE> *o >        
dyn_cast<ELFObjectFile<ELF32LE>>(&Binary)) {
>         +    CopyBinary(*o);
>         +    return 0;
>            }
>            reportError(InputFilename, object_error::invalid_file_type);
>          }
>
>
>
>         在 2017年11月13日 11:32, Leslie Zhai 写道:
>
>             Hi LLVM developers,
>
>             As PR35281 mentioned:
>
>             $ llvm-objcopy -O binary llvm-cortex-m7.elf llvm-cortex-m7.bin
>             llvm-objcopy: 'llvm-cortex-m7.elf': The file was not
>             recognized as a valid object file.
>
>
>             if (ELFObjectFile<ELF64LE> *o >            
dyn_cast<ELFObjectFile<ELF64LE>>(&Binary))
>            
https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-objcopy/llvm-objcopy.cpp#L200
>            
<https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-objcopy/llvm-objcopy.cpp#L200>
>
>
>             Please give me some hints about objcopy armv7e-m ELF32LE
>             via LLVM toolchain, thanks a lot!
>
>
>
>     -- 
>     Regards,
>     Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/
>     <https://reviews.llvm.org/p/xiangzhai/>
>
>     _______________________________________________
>     LLVM Developers mailing list
>     llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
>     http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>     <http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
>
>
-- 
Regards,
Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/

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