topic Re: bss_init and data_init doesn't work with -fPIC in LPCXpresso IDE

bss_init and data_init doesn't work with -fPIC

lpcware — Wed, 15 Jun 2016 22:27:01 GMT

Content originally posted in LPCWare by pgr on Thu Apr 03 05:33:03 MST 2014
Hi,

I have then realized that the functions bss_init() and data_init() from cr_startup are never called when compiling the application using -fPIC option. The variables __data_section_table, __data_section_table_end, __bss_section_table and __bss_section_table_end are all set to 0.

Is this the expected behavior ?

Thanks in advance

Re: bss_init and data_init doesn't work with -fPIC

lpcware — Wed, 15 Jun 2016 22:27:02 GMT

Content originally posted in LPCWare by lpcxpresso-support on Thu Apr 03 05:53:37 MST 2014
This is expected as the Managed Linker Scripts do not support position independent code.

Re: bss_init and data_init doesn't work with -fPIC

lpcware — Wed, 15 Jun 2016 22:27:03 GMT

Content originally posted in LPCWare by pgr on Thu Apr 03 06:23:35 MST 2014
Ok thanks for your quick answer.
What is really strange is that the debugger see the right (expected) values when debugging... but the code that run see 0.

Re: bss_init and data_init doesn't work with -fPIC

lpcware — Wed, 15 Jun 2016 22:27:03 GMT

Content originally posted in LPCWare by lpcxpresso-support on Thu Apr 03 06:46:30 MST 2014
To load and run position independent code (PIC) you need a loader that will
- read the image
- set up the GOT
- initialise the registers (normally R9)
- jump into your application.

PIC is not designed to be run standalone. We do not support the use of PIC.