Compiler: Segmentation fault for constructor attribute and palign(8)

Vladimir Romanov

Other Parts Discussed in Thread: TMS570LS0914

Tool/software: TI C/C++ Compiler

Hello!

palign(8) in link.cmd file not compatible with .init_array section. How to reproduce:

Create program with one (or any odd number) function with _attribute_((constructor)). This will lead to creation of .init_array section.

In link.cmd file specify palign(8) for .init_array section. For sample - .init_array > FLASH, palign(8), fill = 0xffffffff

Compile with map file. Check map file. You can see what .init_array allocate 8 bytes. Check SHT$$INIT_ARRAY$$Base & SHT$$INIT_ARRAY$$Limit symbols in map file. Difference between symbols must be 4 bytes (functions_count*4) but in real difference == 8. SHT$$INIT_ARRAY$$Limit point not to end of init_array data, but to end of section including padding 0xFFFFFFFF. When application start and pinit run_pinit function called, code try to iterate over constructors. At first real constructor called, later called function at 0xFFFFFFFF - HUNG!

I use paling attribute to calculate code CRC32.

over 7 years ago

0 Archaeologist over 7 years ago

TI__Guru* 84225 points

What architecture are you using? C6x? ARM?
What version of the compiler are you using? (This is not the same as the CCS version.)
This is the first I've heard of this attribute, I'm not sure the TI compiler supports it.

0 Vladimir Romanov over 7 years ago in reply to Archaeologist

Intellectual 940 points

I reproduce problem using TI ARM Linker PC v17.3.0.LTS and TI ARM Linker PC v16.9.3 (STS) on TMS570LS0914. I mean this problem is related to linker.

Constructor attribute mentioned in manual (ARM Optimizing C/C++ Compiler v17.3.0.STS)

5.16.2 Function Attributes
The following GCC function attributes are supported:

• constructor

void const_test (void);

static int val = 0;
__attribute__((constructor)) void const_test (void){
    val = 10;
}

0 Archaeologist over 7 years ago in reply to Vladimir Romanov

TI__Guru* 84225 points

Neato! You are correct, attribute constructor was added in 2010 or so. I've also reproduced the error. I've submitted CODEGEN-2286 to address this issue.

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Compiler: Segmentation fault for constructor attribute and palign(8)