TMS570LC4357: tiarmclang fails to link interrupt vector table into .invects

Georg Georg

Part Number: TMS570LC4357
Other Parts Discussed in Thread: HALCOGEN

I am trying to compile and link a project with the tiarmclang. For some reason the .invetcs section always ends up with size 0. The project should use gnu assembly syntax.

Here is the assembler code that defines the interrupt vectors.

    .section ".intvecs"
    .sym_meta_info ".intvecs","retain",1
    .no_dead_strip ".intvecs"
    .arm

resetEntry:
        b   _c_int00
undefEntry:
        b   undefined_instruction_handler
svcEntry:
        b   supervisor_call_handler
prefetchEntry:
        b   prefetch_abort_handler
dataEntry:
        b   data_abort_handler
phantomEntry:
        b   phantom_interrupt_handler
irqEntry:
        ldr pc,[pc,#-0x1b0]
fiqEntry:
        ldr pc,[pc,#-0x1b0]

here is a part of the .map file

architecture: arm
start address: 0x0000a380

Program Header:
    LOAD off    0x00000034 vaddr 0x00000000 paddr 0x00000000 align 2**2
         filesz 0x00000008 memsz 0x00000008 flags r--
    LOAD off    0x00000040 vaddr 0x00000020 paddr 0x00000020 align 2**4
         filesz 0x00010fa0 memsz 0x00010fa0 flags r-x
    LOAD off    0x00010fe0 vaddr 0x0800b730 paddr 0x00010fc0 align 2**4
         filesz 0x00000f30 memsz 0x00000f30 flags r-x
    LOAD off    0x00011f10 vaddr 0x00011ef0 paddr 0x00011ef0 align 2**3
         filesz 0x00001070 memsz 0x00001070 flags r--
    LOAD off    0x00012f80 vaddr 0x08002000 paddr 0x08002000 align 2**2
         filesz 0x00000000 memsz 0x0000972e flags rw-
    LOAD off    0x00012f80 vaddr 0x0800c660 paddr 0x0800c660 align 2**3
         filesz 0x00000000 memsz 0x00000800 flags rw-
    LOAD off    0x00012f80 vaddr 0xf0400000 paddr 0xf0400000 align 2**0
         filesz 0x00080000 memsz 0x00080000 flags r--

Dynamic Section:

Sections:
Idx Name              Size     VMA      LMA      Type
  0                   00000000 00000000 00000000 
  1 .intvecs          00000000 00000000 00000000

Any ideas how to fix this?

over 2 years ago

0 jagadish gundavarapu over 2 years ago

TI__Guru 70391 points

Hi Georg,

We started working on your issue and will try to provide an update ASAP.

Thanks & regards,
Jagadish.

0 jagadish gundavarapu over 2 years ago in reply to jagadish gundavarapu

TI__Guru 70391 points

Hi Georg,

Forwarding to an expert for help.

0 QJ Wang over 2 years ago in reply to jagadish gundavarapu

TI__Guru**** 197166 points

Hi Georg,

The code from HALCOGen is designed for TI-ARM compiler/linker. The TI ARMCL is recommended for Hercules devices.

Is the .invetcs section allocated to 0x00000000 in the flash?

https://software-dl.ti.com/codegen/docs/tiarmclang/compiler_tools_user_guide/migration_guide/index.html

0 Georg Georg over 2 years ago in reply to QJ Wang

Prodigy 120 points

yes .intvecs is at 0x00000000. Snippets from the linker file:

/*----------------------------------------------------------------------------*/
/* Memory Map  */
MEMORY
{
    VECTORS    (X)   : origin=0x00000000 length=0x00000020 vfill = 0xffffffff
    .
    .
    .
}
/*----------------------------------------------------------------------------*/
/* Section Configuration                                                      */
SECTIONS
{

   .intvecs : {} > VECTORS
   .
   .
   .
}

as soon as I use a debugger to set the PC to start address, the code works as expected.

We just need to get the right vector table written to 0x00000000.

0 QJ Wang over 2 years ago in reply to Georg Georg

TI__Guru**** 197166 points

Hi Georg,

Are you using TI ARMCLANG? I am trying to reproduce the issue using Clang 2.1.2 and 3.0.0, and got errors:

If I use the legacy syntax, it still works, and the .intvecs is allocated to 0x00000000:

I am not very familiar with the directives, macros, and intrinsics supported by Clang.

0 QJ Wang over 2 years ago in reply to QJ Wang

TI__Guru**** 197166 points

0 Georg Georg over 2 years ago in reply to QJ Wang

Prodigy 120 points

I guess the illegal mnemonic error is cause by having gnu syntax in a .ASM file. In my experience ccs try to compile all .ASM files with legacy ti syntax, .s or .S file should be compiled using gnu syntax.

Do you know of any example project using tiarmclang, even for other microcontrollers?

0 QJ Wang over 2 years ago in reply to Georg Georg

TI__Guru**** 197166 points

Hi Georg,

All the examples (CCS projects) in AM263x and AM243x SDK use tiarmclang by default.

https://www.ti.com/tool/MCU-PLUS-SDK-AM263X

https://dev.ti.com/tirex/explore/node?node=A__AD2nw6Uu4txAz2eqZdShBg__com.ti.MCU_PLUS_SDK_AM263X__aBmeCqF__LATEST

0 Georg Georg over 2 years ago in reply to QJ Wang

Prodigy 120 points

Thanks for the links, they helped me fixing this issue.

the assember code got the following header:

        .text
        .global resetEntry
        .type   resetEntry,%function
        .section ".intvecs","ax",%progbits
        .arm

in the linker script the -e option seem very important

--retain="*(.intvecs)"
-eresetEntry

I hope this helps someone at some point

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TMS570LC4357: tiarmclang fails to link interrupt vector table into .invects