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kludge.s
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1993-11-25
|
790b
|
43 lines
|
| This is a variant of the method use in 'ofake' to use pseudo drives in
| an installable filesystem. Basically mediach, rwabs and getbpb have to
| be faked by intercepting their vectors. It works but it's a kludge, this
| kind of thing shouldn't be necessary.
|
.globl _kludge_rwabs,_kludge_mediach,_kludge_getbpb
_kludge_rwabs:
movml d0-d1,sp@-
movel _shadmap,d0
movew sp@(0x16),d1
btst d1,d0
bne ret0
movml sp@+,d0-d1
movel _old_rwabs,sp@-
rts
_kludge_mediach:
movml d0-d1,sp@-
movel _shadmap,d0
movew sp@(0xc),d1
btst d1,d0
bne ret0
movml sp@+,d0-d1
movel _old_mediach,sp@-
rts
_kludge_getbpb:
movml d0-d1,sp@-
movel _shadmap,d0
movew sp@(0xc),d1
btst d1,d0
bne ret0
movml sp@+,d0-d1
movel _old_getbpb,sp@-
rts
ret0: movml sp@+,d0-d1
movq #0,d0
rts