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(ia64_install_cursor): Take additional arguments "bspstore", "dirty_size",

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"dirty_partition", and "dirty_nat".  If size of dirty partition
	is non-zero, load it up via "loadrs" before resuming execution.

(Logical change 1.259)
This commit is contained in:
hp.com!davidm 2004-08-31 13:59:10 +00:00
parent 3386d284fa
commit 0aa29032f6
1 changed files with 28 additions and 6 deletions
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34
src/ia64/Ginstall_cursor.S
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@ -37,7 +37,9 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#ifndef UNW_REMOTE_ONLY
/* ia64_install_cursor (const cursor *c, long pri_unat, long *extra)
/* ia64_install_cursor (const cursor *c, long pri_unat, long *extra,
long bspstore, long dirty_size, long *dirty_partition,
long dirty_rnat)
Restores the machine-state represented by C and thereby resumes execution
in that frame. If the frame or one of its descendants was interrupted
@ -53,7 +55,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
.global ia64_install_cursor
.proc ia64_install_cursor
ia64_install_cursor:
alloc r3 = ar.pfs, 3, 0, 0, 0
alloc r3 = ar.pfs, 7, 0, 0, 0
invala
add r2 = FR_LOC_OFF, in0
;;
@ -231,7 +233,7 @@ ia64_install_cursor:
ld8 r27 = [r27] // r27 = *fpsr_loc
and r28 = -4, r28
ld8 r30 = [r2] // r30 = bsp
mov r30 = in3 // make backup-copy of new bsp
ld8 r31 = [r3] // r31 = pr
mov rp = r15
;;
@ -242,9 +244,29 @@ ia64_install_cursor:
;;
loadrs // drop dirty partition
mov r9 = in2 // make backup-copy of &extra[r16]
cmp.eq p8, p0 = in4, r0 // dirty-size == 0?
(p8) br.cond.dpnt.many .skip_load_dirty
mov r2 = in4 // make backup-copy of dirty_size
mov r15 = in5 // make backup-copy of dirty_partition
mov r16 = in6 // make backup-copy of dirty_rnat
;;
alloc r3 = ar.pfs, 0, 0, 0, 0 // drop register frame
dep r11 = r2, r11, 16, 16
;;
mov.m ar.bspstore = r15
;;
mov.m ar.rnat = r16
mov.m ar.rsc = r11 // 14 cycles latency to loadrs
;;
loadrs // loadup new dirty partition
;;
.skip_load_dirty:
mov.m ar.bspstore = r30 // restore register backing-store
add r3 = 8, in2 // r3 = &extra[r16]
add r3 = 8, r9 // r3 = &extra[r16]
;;
(pRet) mov.m ar.fpsr = r27 // fpsr restored (don't touch no more)
@ -254,12 +276,12 @@ ia64_install_cursor:
/****** Return via br.ret: */
ld8 r14 = [r14] // r14 = *pfs_loc
ld8 r15 = [in2], 16 // r15 restored (don't touch no more)
ld8 r15 = [r9], 16 // r15 restored (don't touch no more)
mov pr = r31, -1 // pr restored (don't touch no more)
;;
ld8 r16 = [r3], 16 // r16 restored (don't touch no more)
ld8 r17 = [in2] // r17 restored (don't touch no more)
ld8 r17 = [r9] // r17 restored (don't touch no more)
nop.i 0
;;