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| author | rpaulo <rpaulo@FreeBSD.org> | 2010-07-06 16:56:27 +0000 |
|---|---|---|
| committer | rpaulo <rpaulo@FreeBSD.org> | 2010-07-06 16:56:27 +0000 |
| commit | 6b746d7d7dfe7b095d2a50b04ce49586fd4a0079 (patch) | |
| tree | 6084eaaea30af98d777d4ff2517bf537a7fea995 | |
| parent | e0da55d85c88cc5e6e6ea9a7daaf024f51bfe9d0 (diff) | |
| download | FreeBSD-src-6b746d7d7dfe7b095d2a50b04ce49586fd4a0079.zip FreeBSD-src-6b746d7d7dfe7b095d2a50b04ce49586fd4a0079.tar.gz | |
Introduce USD_{SET,GET}{BASE,LIMIT}. These help setting up the user
segment descriptor hi and lo values. Idea from Solaris.
Reviewed by: kib
| -rw-r--r-- | sys/amd64/include/segments.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/amd64/include/segments.h b/sys/amd64/include/segments.h index 3dca80a..d0604be 100644 --- a/sys/amd64/include/segments.h +++ b/sys/amd64/include/segments.h @@ -74,6 +74,13 @@ struct user_segment_descriptor { u_int64_t sd_hibase:8; /* segment base address (msb) */ } __packed; +#define USD_GETBASE(_sd) (((_sd)->sd_lobase) | (_sd)->sd_hibase << 24) +#define USD_SETBASE(_sd, _b) (_sd)->sd_lobase = (_b); \ + (_sd)->sd_hibase = ((_b) >> 24); +#define USD_GETLIMIT(_sd) (((_sd)->sd_lolimit) | (_sd)->sd_hilimit << 16) +#define USD_SETLIMIT(_sd, _l) (_sd)->sd_lolimit = (_l); \ + (_sd)->sd_hilimit = ((_l) >> 16); + /* * System segment descriptors (128 bit wide) */ |
