darkkirb/old-cross-binutils
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

* sparc-stub.c (trap_low): Make trap handler work for arbitrary

Browse source 
numbers of register windows.
This commit is contained in:
Stu Grossman 1994-02-24 01:49:15 +00:00
parent 30d7f715a9
commit 75a006d94f
2 changed files with 24 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
gdb/ChangeLog
View file

@ -6,6 +6,9 @@ Wed Feb 23 16:28:55 1994 Jeffrey A. Law (law@cygnus.com)
Wed Feb 23 16:21:25 1994 Stu Grossman (grossman at cygnus.com)
* sparc-stub.c (trap_low): Make trap handler work for arbitrary
numbers of register windows.
* sparclite/hello.c: Add factorial function for testing.
* salib.c: Use macros instead of constants for I/O addresses to
make 931 support easier.

24
gdb/sparc-stub.c
View file

@ -157,9 +157,27 @@ _trap_low:
mov %g1, %l4 ! Save g1, we use it to hold the wim
srl %l3, 1, %g1 ! Rotate wim right
sll %l3, 8-1, %l5
or %l5, %g1, %g1
tst %g1
bg good_wim ! Branch if new wim is non-zero
! At this point, we need to bring a 1 into the high order bit of the wim.
! Since we don't want to make any assumptions about the number of register
! windows, we figure it out dynamically so as to setup the wim correctly.
not %g1 ! Fill g1 with ones
mov %g1, %wim ! Fill the wim with ones
nop
nop
nop
mov %wim, %g1 ! Read back the wim
inc %g1 ! Now g1 has 1 just to left of wim
srl %g1, 1, %g1 ! Now put 1 at top of wim
mov %g0, %wim ! Clear wim so that subsequent save
nop ! won't trap
nop
nop
good_wim:
save %g0, %g0, %g0 ! Slip into next window
mov %g1, %wim ! Install the new wim
@ -758,7 +776,7 @@ handle_exception (registers)
break;
#if 0
case 't': /* Test feature */
asm (" std %f31,[%sp]");
asm (" std %f30,[%sp]");
break;
#endif
case 'r': /* Reset */