I'v seen exactly the same problem with "--out-fmt-elf" and "_naked". it
must be bug.
On Sun, May 10, 2020 at 8:55 PM Basil Hussain <ba...@stasisleak.uk> wrote:
> Hi all,
>
> I have encountered an odd problem with sdasstm8 crashing. I believe I
> have narrowed it down to a particular set of circumstances, which are:
>
> * Using --debug and --out-fmt-elf options together, and;
> * Having a function with __naked attribute that contains inline assembly
> code.
>
> It seems to hinge on the use of the ELF output option. With everything
> else being equal, but using --out-fmt-hex, there is no crash.
> Alternatively, if I instead just comment out the use of the __naked
> attribute, then ELF compilation succeeds.
>
> I'm assuming it's something to do with the contents of the .asm file
> that sdas is being asked to assemble, and indeed if I examine the output
> of both an ELF and Intel Hex output compilation, there are substantial
> differences between the two - mainly that the former has a massive
> amount of debug stuff appended, which the latter omits.
>
> Here is a minimal sample program that demonstrates the problem:
>
> unsigned int do_something(unsigned char a, unsigned char b) {
> return a + b;
> }
>
> void do_nothing(void) __naked {
> __asm
> nop
> nop
> nop
> ret
> __endasm;
> }
>
> void main(void) {
> unsigned int foo;
>
> foo = do_something(100, 42);
> do_nothing();
>
> while(1);
> }
>
> This is a log of the verbose output from the crashing scenario, when
> asking SDCC for ELF output:
>
> sdcc.exe -mstm8 --verbose --debug --out-fmt-elf -I"C:\Program
> Files\SDCC\include" -c main.c -o obj\ELF\main.rel
> sdcc.exe -L"C:\Program Files\SDCC\lib" -o bin\ELF\test.elf -mstm8
> --verbose --debug --out-fmt-elf obj\ELF\main.rel
> sdcc: Calling preprocessor...
> sdcc: sdcpp.exe -nostdinc -Wall -std=c11 -I"C:\Program
> Files\SDCC\include" -obj-ext=.rel -D__SDCC_STACK_AUTO
> -D__SDCC_CHAR_UNSIGNED -D__SDCC_MODEL_MEDIUM -D__SDCC_INT_LONG_REENT
> -D__SDCC_FLOAT_REENT -D__SDCC=4_0_0 -D__SDCC_VERSION_MAJOR=4
> -D__SDCC_VERSION_MINOR=0 -D__SDCC_VERSION_PATCH=0
> -D__SDCC_REVISION=11528 -D__SDCC_stm8 -D__STDC_NO_COMPLEX__=1
> -D__STDC_NO_THREADS__=1 -D__STDC_NO_ATOMICS__=1 -D__STDC_NO_VLA__=1
> -D__STDC_ISO_10646__=201409L -D__STDC_UTF_16__=1 -D__STDC_UTF_32__=1
> -isystem "C:\Program Files\SDCC\bin\..\include\stm8" -isystem
> "C:\Program Files\SDCC\bin\..\include" "main.c"
> sdcc: Generating code...
> sdcc: Calling assembler...
> sdcc: sdasstm8.exe -plosgffwy ""obj\ELF\main".asm"
>
> The execution of sdasstm8 crashes (with the usual "sdasstm8.exe has
> stopped working" message from Windows), so the whole compilation process
> fails to complete. There are no error messages output by sdas.
>
> This is the output from the non-crash scenario, when asking for Intel
> Hex output:
>
> sdcc.exe -mstm8 --verbose --debug --out-fmt-ihx -I"C:\Program
> Files\SDCC\include" -c main.c -o obj\IHX\main.rel
> sdcc.exe -L"C:\Program Files\SDCC\lib" -o bin\IHX\test.hex -mstm8
> --verbose --debug --out-fmt-ihx obj\IHX\main.rel
> sdcc: Calling preprocessor...
> sdcc: sdcpp.exe -nostdinc -Wall -std=c11 -I"C:\Program
> Files\SDCC\include" -obj-ext=.rel -D__SDCC_STACK_AUTO
> -D__SDCC_CHAR_UNSIGNED -D__SDCC_MODEL_MEDIUM -D__SDCC_INT_LONG_REENT
> -D__SDCC_FLOAT_REENT -D__SDCC=4_0_0 -D__SDCC_VERSION_MAJOR=4
> -D__SDCC_VERSION_MINOR=0 -D__SDCC_VERSION_PATCH=0
> -D__SDCC_REVISION=11528 -D__SDCC_stm8 -D__STDC_NO_COMPLEX__=1
> -D__STDC_NO_THREADS__=1 -D__STDC_NO_ATOMICS__=1 -D__STDC_NO_VLA__=1
> -D__STDC_ISO_10646__=201409L -D__STDC_UTF_16__=1 -D__STDC_UTF_32__=1
> -isystem "C:\Program Files\SDCC\bin\..\include\stm8" -isystem
> "C:\Program Files\SDCC\bin\..\include" "main.c"
> sdcc: Generating code...
> sdcc: Calling assembler...
> sdcc: sdasstm8.exe -plosgffwy ""obj\IHX\main".asm"
> sdcc: Calling linker...
> sdcc: sdldstm8.exe -nf ""bin\IHX\test.lk""
>
> I am using SDCC 4.0.0 on Windows 7. If it helps, I can supply a
> Code::Blocks project that is set up to demonstrate the problem.
>
> Regards,
> Basil Hussain
>
>
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