walsh@BBN-LABS-B.ARPA (06/25/84)
From: Bob Walsh <walsh@BBN-LABS-B.ARPA>
If you need to increase the size of the kernel stack, you can increase
UPAGES in vax/param.h from 8 to 10. If you do so, you'll run into the
following problems:
1. a make doesn't recompile anything
2. after touching all the appropriate files, the booted system
crashes
To fix the problem, you need to edit vax/locore.s. (If you edit
mysys/locore.c, your edited locore.c is thrown away by the make rules.)
In locore.s, the subroutine Fastreclaim should be more properly coded as:
*** locore.s Sun Jun 24 18:52:02 1984
--- locore.old Tue Jun 19 15:26:23 1984
***************
*** 1161,1167
movl $1,r2 # type = CTEXT;
jbr 3f
2:
! subl3 P_SSIZE(r5),$(0x400000-UPAGES),r0
cmpl r3,r0
jgequ 2f # } else if (isadsv(p, v)) {
ashl $2,r3,r4
--- 1157,1163 -----
movl $1,r2 # type = CTEXT;
jbr 3f
2:
! subl3 P_SSIZE(r5),$0x3ffff8,r0
cmpl r3,r0
jgequ 2f # } else if (isadsv(p, v)) {
ashl $2,r3,r4
***************
*** 1171,1177
2:
cvtwl P_SZPT(r5),r4 # } else (isassv(p, v)) {
ashl $7,r4,r4
! subl2 $0x400000,r4
addl2 r3,r4
ashl $2,r4,r4
addl2 P_P0BR(r5),r4 # sptopte(p, vtosp(p, v));
--- 1167,1173 -----
2:
cvtwl P_SZPT(r5),r4 # } else (isassv(p, v)) {
ashl $7,r4,r4
! subl2 $(0x3ffff8+UPAGES),r4
addl2 r3,r4
ashl $2,r4,r4
addl2 P_P0BR(r5),r4 # sptopte(p, vtosp(p, v));
bob walsh