Let's minimize the alignment requirements of each segment's offset.
It'll make binaries take less room later. Otherwise we may need to pad
lots of 0s for segments after the first.
Generated ELF binaries continue to work natively (except ex4, but that
was already not working).
ex4 now writes to the (global) data segment, rather than trying to write
to the code segment.
We still need to specify the other segments in the generated ELF,
though.
Second attempt at commit 4291. We'll now not copy the headers into
memory, but we'll still allocate space for them. Still some security
benefits, and I'm gaining confidence that I understand the ELF format.
Learning to use the data segment.
Currently, subx can only run the teensy files generated from flat
assembler:
test4
test5
test7
This is not a priority to fix. These files are just useful references to
have around.
Doesn't compile.
I'm still not sure how to represent types and global variables.
Types won't be in the final binary.
But globals will. Perhaps I should first figure out what that looks like.
No need for it once the program's loaded. And we keep programs from
running the header as code.
This also simplifies the header computation in the translator.
Kartik Agaram