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| author | Stu Grossman <grossman@cygnus> | 1994-02-24 01:49:15 +0000 |
|---|---|---|
| committer | Stu Grossman <grossman@cygnus> | 1994-02-24 01:49:15 +0000 |
| commit | 75a006d94f08c4f01e44f6caae6f161159902be7 (patch) | |
| tree | 9d7d48737f76c3c2a79c646ee9a209016c07234a /gdb/sparc-stub.c | |
| parent | 30d7f715a9d1ffb5ca11b66c4de1879a315f8636 (diff) | |
| download | gdb-75a006d94f08c4f01e44f6caae6f161159902be7.zip gdb-75a006d94f08c4f01e44f6caae6f161159902be7.tar.gz gdb-75a006d94f08c4f01e44f6caae6f161159902be7.tar.bz2 | |
* sparc-stub.c (trap_low): Make trap handler work for arbitrary
numbers of register windows.
Diffstat (limited to 'gdb/sparc-stub.c')
| -rw-r--r-- | gdb/sparc-stub.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/gdb/sparc-stub.c b/gdb/sparc-stub.c index 5de62a3..d2e7b43 100644 --- a/gdb/sparc-stub.c +++ b/gdb/sparc-stub.c @@ -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 */ |