TMS570LC4357: How to combine the .cinit section with other sections into a single output section

Hanson liu

Part Number: TMS570LC4357

Tool/software:

Hi, team:

I am trying to combine the .cinit section with other sections into a single output section in my linker script. Below is the relevant part of my SECTIONS configuration:

SECTIONS {

combined_section: {

        *(.cinit)

        *(other_section)

    } > MEMORY_REGION

However, during the build process, I receive the following warning:

 warning #10068-D: no matching section
warning #10247-D: creating output section ".cinit" without a SECTIONS specification

It seems that the *(.cinit) is not being recognized.

I would greatly appreciate any advice or recommendations to resolve this issue.

Best regards,

Hanson Liu

7 months ago

0 Kier 7 months ago

Mastermind 8845 points

I think you need this syntax:

SECTIONS
{
    GROUP : {
    .cinit : {
    } palign(8)
    .other_section : {
    } palign(8)
    } > MEMORY_REGION
}

0 Hanson liu 7 months ago in reply to Kier

Prodigy 60 points

Hi Kier,

Thank you for your response. However, I’m afraid it doesn’t fully address my concern. I had already tried the syntax you suggested before reaching out for assistance. While both syntaxes function correctly, my issue arises specifically when I attempt to use the RUN_START() and RUN_END() syntax.

These operations are designed to work with each section individually, which means that the GROUP syntax isn’t applicable. Therefore, I need to combine .cinit and .other_section into a single section, rather than grouping them. Additionally, I prefer not to allocate .cinit to a single, isolated section.

I apologize if my initial post didn’t clearly convey the details of the issue. I would greatly appreciate any advice or guidance you could provide.

Best regards,
Hanson Liu

+1 Kier 7 months ago in reply to Hanson liu

Mastermind 8845 points

But .cinit is already an output section. Your syntax is for input sections. It does not work because there is no input section called .cinit. That is why you get the warnings.

Therefore you should make an output section called 'combined_section' then combine it with .cinit (already an output section) using GROUP.

Hanson liu said:
These operations are designed to work with each section individually, which means that the GROUP syntax isn’t applicable

With my compiler at least, that it not the case. I can use the RUN_START and RUN_END after a GROUP statement. For example:

The resulting map file shows that __BSS_START = _dummy_group_start_label but _dummy_group_end_label is at the end of the stack:

0 Hanson liu 7 months ago in reply to Kier

Prodigy 60 points

Thank you. This resolved my issue. By the way, is there a way to use crc_table() with an entire GROUP?

0 Kier 7 months ago in reply to Hanson liu

Mastermind 8845 points

You're welcome. Sorry I have no experience of using crc_table(). Perhaps it is better to raise a new ticket for this topic?

0 Kier 7 months ago in reply to Hanson liu

Mastermind 8845 points

Did you check your compiler manual? In my TI Arm Clang Compiler manual it shows an example:

10.9.2. Using the crc_table() Operator in the MEMORY Directive — TI Arm Clang Compiler Tools User's Guide

0 Hanson liu 7 months ago in reply to Kier

Prodigy 60 points

I've resolved my issue another way. I checked my compiler manual. It seems that crc() is not supported. Just sharing for reference.:
*ARM Assembly Language Tools v20.2.0.LTS User's Guide (Rev. Z)

Arm-based microcontrollers

Arm-based microcontrollers forum

TMS570LC4357: How to combine the .cinit section with other sections into a single output section