Fellows,
I want to remap start-up configuration.
So, I'm thinking of breaking down in parts some start-up procedures and adding
c++ constructors/destructors. In order to do that I think I will add some
sections like '.init0' ... '.init3' and '.fini0' ... '.fini3' put appropriate
code there.
In details:
- .init0 will contain copy data section loop
- .init1 will contain clear bss loop
- .init2 will contain c++ constructors code and linked as appropriate
- .init3 jump to main only: 'br #main'
- .fini0 will contain _nothing_ .. just a label __stop_ProcExec_
- .fini1 will contail c++ destructors linked as necessary
- .fini2 will contain an old __stop_ProcExec_ and new label to loop at like
.Llabel:
mov r15, r2
jmp .Llabel
- .fini3 will contain ... something.
Also, two sections have to be introduced - .ctors and .dtors
The overal elf sections map will look as:
.text:
.init0
.init1
.init2
.init3
... user code as in .text.*
.fini0
.fini1
.fini2
.fini3
.ctors
.dtors
.data
.noinit's data (still in doubt if .noinit may contain initialized data)
.vectors:
.bss:
.bss
.noinit
.all the user stuff
Any suggestions? Comments? Additions? etc.?
I hope to implement it in gcc-3.3 (hopefully) and above and current binutils.
cheers,
~d
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