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hth313 / Calypsi-tool-chains

Overview of the Calypsi tool chain and open source support packages
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ELF section header type -2147483638 #29

Closed djipi closed 1 year ago

djipi commented 1 year ago

My homebrew project is using a bare metal platform (68000 with a couple of risc processors). Using vlink linker, I got a warning message and would like to know more about it. ELF section header type -2147483638.

This section is found either in my compiled code and in the Calypsi's library.

hth313 commented 1 year ago

This is a vendor info section, there are two of these in the object files with number 0x8000000a (this is the one you found) and 0x8000000b.

It contains information about defined run-time attributes, section fragments (for pruning DWARF line programs), require attribute and section attributes like root/noroot/noreorder. It is information for the linker that is not otherwise carried in ELF which the linker use to detect module incompatibility and otherwise mainly to get the desired pieces from the C startup module automatically include or omitted to produce small binaries.

The other vendor section contains compiler settings, such as code/data models, core and target settings. These are for the debugger, mainly to configure the behavior, e.g. of the expression evaluator.

djipi commented 1 year ago

Thank you for the feedbacks. I think vlink is not able to handle such vendor info section. I'm able to generates an elf file but my emulator / debugger is not able to handle it yet. This is another story, and I will dig about it.