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Replace sv_ex_tw by padding (it is no longer used; the tag word in sv_env

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is valid).

Expand comment about bogus padding for emulators.

Update prototpe for npxinit().
This commit is contained in:
Bruce Evans 1995-01-03 03:57:46 +00:00
parent 8546c86b55
commit d5ebbddc5e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5350
3 changed files with 39 additions and 24 deletions
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21
sys/amd64/include/fpu.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)npx.h 5.3 (Berkeley) 1/18/91
* $Id: npx.h,v 1.5 1994/11/04 02:13:15 jkh Exp $
* $Id: npx.h,v 1.6 1994/11/05 22:59:09 bde Exp $
*/
/*
@ -71,13 +71,18 @@ struct fpacc87 {
/* Floating point context */
struct save87 {
struct env87 sv_env; /* floating point control/status */
struct env87 sv_env; /* floating point control/status */
struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
u_long sv_ex_sw; /* status word for last exception (was pad) */
u_long sv_ex_tw; /* tag word for last exception (was pad) */
u_char sv_pad[60]; /* needed for the GPL math emulator */
/* the whole length of this structure
must match i387_union */
u_long sv_ex_sw; /* status word for last exception */
/*
* Bogus padding for emulators. Emulators should use their own
* struct and arrange to store into this struct (ending here)
* before it is inspected for ptracing or for core dumps. Some
* emulators overwrite the whole struct. We have no good way of
* knowing how much padding to leave. Leave just enough for the
* GPL emulator's i387_union (176 bytes total).
*/
u_char sv_pad[64]; /* padding; used by emulators */
};
/* Cyrix EMC memory - mapped coprocessor context switch information */
@ -144,7 +149,7 @@ struct proc;
int npxdna __P((void));
void npxexit __P((struct proc *p));
void npxinit __P((u_int control));
void npxinit __P((int control));
void npxintr __P((struct intrframe frame));
void npxsave __P((struct save87 *addr));
#endif

21
sys/amd64/include/npx.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)npx.h 5.3 (Berkeley) 1/18/91
* $Id: npx.h,v 1.5 1994/11/04 02:13:15 jkh Exp $
* $Id: npx.h,v 1.6 1994/11/05 22:59:09 bde Exp $
*/
/*
@ -71,13 +71,18 @@ struct fpacc87 {
/* Floating point context */
struct save87 {
struct env87 sv_env; /* floating point control/status */
struct env87 sv_env; /* floating point control/status */
struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
u_long sv_ex_sw; /* status word for last exception (was pad) */
u_long sv_ex_tw; /* tag word for last exception (was pad) */
u_char sv_pad[60]; /* needed for the GPL math emulator */
/* the whole length of this structure
must match i387_union */
u_long sv_ex_sw; /* status word for last exception */
/*
* Bogus padding for emulators. Emulators should use their own
* struct and arrange to store into this struct (ending here)
* before it is inspected for ptracing or for core dumps. Some
* emulators overwrite the whole struct. We have no good way of
* knowing how much padding to leave. Leave just enough for the
* GPL emulator's i387_union (176 bytes total).
*/
u_char sv_pad[64]; /* padding; used by emulators */
};
/* Cyrix EMC memory - mapped coprocessor context switch information */
@ -144,7 +149,7 @@ struct proc;
int npxdna __P((void));
void npxexit __P((struct proc *p));
void npxinit __P((u_int control));
void npxinit __P((int control));
void npxintr __P((struct intrframe frame));
void npxsave __P((struct save87 *addr));
#endif

21
sys/i386/include/npx.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)npx.h 5.3 (Berkeley) 1/18/91
* $Id: npx.h,v 1.5 1994/11/04 02:13:15 jkh Exp $
* $Id: npx.h,v 1.6 1994/11/05 22:59:09 bde Exp $
*/
/*
@ -71,13 +71,18 @@ struct fpacc87 {
/* Floating point context */
struct save87 {
struct env87 sv_env; /* floating point control/status */
struct env87 sv_env; /* floating point control/status */
struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
u_long sv_ex_sw; /* status word for last exception (was pad) */
u_long sv_ex_tw; /* tag word for last exception (was pad) */
u_char sv_pad[60]; /* needed for the GPL math emulator */
/* the whole length of this structure
must match i387_union */
u_long sv_ex_sw; /* status word for last exception */
/*
* Bogus padding for emulators. Emulators should use their own
* struct and arrange to store into this struct (ending here)
* before it is inspected for ptracing or for core dumps. Some
* emulators overwrite the whole struct. We have no good way of
* knowing how much padding to leave. Leave just enough for the
* GPL emulator's i387_union (176 bytes total).
*/
u_char sv_pad[64]; /* padding; used by emulators */
};
/* Cyrix EMC memory - mapped coprocessor context switch information */
@ -144,7 +149,7 @@ struct proc;
int npxdna __P((void));
void npxexit __P((struct proc *p));
void npxinit __P((u_int control));
void npxinit __P((int control));
void npxintr __P((struct intrframe frame));
void npxsave __P((struct save87 *addr));
#endif