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some hacky checks for common errors

They're not really baked into the regular compilation process; I have to
remember to run them if I see strange behavior.
main
Kartik K. Agaram 1 year ago
parent
commit
d8d9dfa855
  1. 4
      linux/bootstrap/033check_operands.cc
  2. 22
      misc_checks
  3. 3
      misc_checks.subx

4
linux/bootstrap/033check_operands.cc

@ -145,6 +145,10 @@ void init_permitted_arguments() {
put(Permitted_arguments, "99", 0x00);
// return
put(Permitted_arguments, "c3", 0x00);
// enable/disable interrupts
// not really part of SubX; just needed in low-level boot.subx
put(Permitted_arguments, "fa", 0x00);
put(Permitted_arguments, "fb", 0x00);
//// Class B: just op and disp8
// imm32 imm8 disp32 |disp16 disp8 subop modrm

22
misc_checks

@ -0,0 +1,22 @@
#!/bin/sh
# Hackily check for certain kinds of errors.
#
# We still rely exclusively on linux/bootstrap/bootstrap for some static
# checks on bare SubX code that aren't implemented yet in the self-hosted
# translator phases.
#
# However, boot.subx uses instructions that bootstrap doesn't recognize. So we
# won't check it.
set -e
cat $* [0-9]*.mu |linux/mu > a.subx
cat misc_checks.subx mu-init.subx [0-9]*.subx a.subx |linux/braces > a.braces
cat a.braces |linux/calls > a.calls
cat a.calls |linux/sigils > a.sigils
CXXFLAGS=-g linux/bootstrap/bootstrap --debug translate a.sigils -o a.elf
# Translation will never succeed,
# but if we get to "missing reference to global" errors, they're expected and
# we've gotten to the end of what bootstrap can check for us.

3
misc_checks.subx

@ -0,0 +1,3 @@
== code 0x00000000
== data 0x80000000
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