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| author | rsc <rsc> | 2007-08-14 04:05:27 +0000 |
|---|---|---|
| committer | rsc <rsc> | 2007-08-14 04:05:27 +0000 |
| commit | 3163085ace9f530bdf6dbc83c62d5e3842728860 (patch) | |
| tree | fe6c4210a15fe5e6aedf942a0b2b20e30464791e /asm.h | |
| parent | 5e03dd86c8de6180ddbddb16974e5af1a010f60b (diff) | |
| download | xv6-labs-3163085ace9f530bdf6dbc83c62d5e3842728860.tar.gz xv6-labs-3163085ace9f530bdf6dbc83c62d5e3842728860.tar.bz2 xv6-labs-3163085ace9f530bdf6dbc83c62d5e3842728860.zip | |
Cannot use "g" as an arg constraint because
some memory references aren't actually valid
and gcc is a bit too smart in parsing (%0) and
a bit too dumb in knowing which memory refs
are not valid. Using "r" seems to constrain gcc
to use a register as in (%eax) and not substitute
a memory reference like (-36(%ebp)).
No one really understands these things.
Diffstat (limited to 'asm.h')
0 files changed, 0 insertions, 0 deletions