10.06.2012 20:26, Florian Klämpfl пишет:
Am 10.06.2012 08:15, schrieb Fuxin Zhang:
Dear sirs,
When trying to generate code debuggable by GDB, I meet a problem:
* it seems mips C code will expect a frame pointer = sp after stack
adjustment
* but in cpupara.pas, when we create para info, we don't know yet the
whole stack size, thus the reference offset cannot be set correctly
This is exactly the point where I'am already stuck with MIPS for several
days/weeks. I'am still no sure what's the best solution ...
As far as I can understand, basically the same problem stands in the way of implementing compliant
stack frames for x86_64-win64. I was thinking about a having a virtual framepointer register. We'll
need to:
- keep a list of all assembler instructions that reference this virtual FP
register
- after final frame size becomes known, fixup these instructions to reference a real FP with
adjusted offset. Or maybe not keep a separate list of instructions, but instead just iterate the
entire procedure asmlist (because about every second instruction is subject to fixup).
Regards,
Sergei
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