anchao commented on PR #12624:
URL: https://github.com/apache/nuttx/pull/12624#issuecomment-2209688351
> Please include a usage example or documentation explaining how 3rd party
applications will use it, it could be obvious for you, but maybe not of other
developers. :-)
@acassis comment message has been updated
> Imagine a 3rd_party library wants to put its "data_img" at nuttx data
memory, is it just need to define CONFIG_SIM_CUSTOM_DATA_SECTION as "data_img"?
@acassis we need to follow the syntax of linker script. In 3rd-party
applications, some data will be labeled as section:
```
| a.c:
| struct task_s a __attribute__((section(".data.custom.taska")));
| b.c:
| struct task_s b __attribute__((section(".data.custom.taskb")));
```
Data of the same type struct can be placed in a fixed location to reduce the
overhead caused by searching:
```
| .data :
| {
| _custom_data_table_start = .;
| KEEP(*(.data.custom.*))
| _custom_data_table_end = .;
| }
```
Such section declare can be configured via Kconfig in the PR:
```
| CONFIG_SIM_CUSTOM_DATA_SECTION=" .data : { _custom_data_table_start = .;
KEEP(*(.data.custom.*)) _custom_data_table_end = .; } "
```
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