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Added the ability to remove rbyd tags via tombstoning

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It's quite lucky a spare bit is free in the tag encoding, this means we
don't need a reserved length value as originally planned. We end up using
all of the bits that overlap the alt pointer encoding, which is nice and
unexpected.
This commit is contained in:
Christopher Haster
2022-12-28 02:12:32 -06:00
parent 2b475662e9
commit 5cdda57373
4 changed files with 558 additions and 118 deletions
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64
scripts/dbgrbyd.py
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@@ -45,31 +45,49 @@ def tagrepr(tag, size, off=None):
type2 = (tag >> 7) & 0xff
id = (tag >> 15) & 0xffff
if type1 == 0x40:
return 'create x%02x id%d %d' % (type2, id, size)
elif type1 == 0x48:
return 'delete x%02x id%d %d' % (type2, id, size)
elif type1 == 0x50:
return 'struct x%02x id%d %d' % (type2, id, size)
elif type1 == 0x60:
return 'uattr x%02x id%d %d' % (type2, id, size)
elif type1 == 0x08:
if type2 == 0:
return 'tail %d' % size
else:
return 'tail x%02x %d' % (type2, size)
elif type1 == 0x10:
return 'gstate x%02x %d' % (type2, size)
if (type1 & 0x7e) == 0x40:
return '%screate x%02x id%d%s' % (
'~' if type1 & 0x1 else '',
type2,
id,
' %d' % size if not type1 & 0x1 else '')
elif (type1 & 0x7e) == 0x48:
return '%sdelete x%02x id%d%s' % (
'~' if type1 & 0x1 else '',
type2,
id,
' %d' % size if not type1 & 0x1 else '')
elif (type1 & 0x7e) == 0x50:
return '%sstruct x%02x id%d%s' % (
'~' if type1 & 0x1 else '',
type2,
id,
' %d' % size if not type1 & 0x1 else '')
elif (type1 & 0x7e) == 0x60:
return '%suattr x%02x id%d%s' % (
'~' if type1 & 0x1 else '',
type2,
id,
' %d' % size if not type1 & 0x1 else '')
elif (type1 & 0x7e) == 0x08:
return '%stail%s%s' % (
'~' if type1 & 0x1 else '',
' x%02x' % type2 if type2 else '',
' %d' % size if not type1 & 0x1 else '')
elif (type1 & 0x7e) == 0x10:
return '%sgstate x%02x%s' % (
'~' if type1 & 0x1 else '',
type2,
' %d' % size if not type1 & 0x1 else '')
elif (type1 & 0x7e) == 0x02:
if type2 == 0:
return 'crc%x %d' % (type1 >> 3, size)
else:
return 'crc%x x%02x %d' % (type1 >> 3, type2, size)
return 'crc%x%s %d' % (
type1 >> 3,
' x%02x' % type2 if type2 else '',
size)
elif type1 == 0x0a:
if type2 == 0:
return 'fcrc %d' % (size)
else:
return 'fcrc x%02x %d' % (type2, size)
return 'fcrc%s %d' % (
' x%02x' % type2 if type2 else '',
size)
elif type1 & 0x4:
return 'alt%s%s x%x %s' % (
'r' if type1 & 1 else 'b',