diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/shared/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/sparc/shared/start/start.S | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/sparc/shared/start/start.S b/c/src/lib/libbsp/sparc/shared/start/start.S index b7067b32bd..3e0e42e7df 100644 --- a/c/src/lib/libbsp/sparc/shared/start/start.S +++ b/c/src/lib/libbsp/sparc/shared/start/start.S @@ -51,6 +51,15 @@ nop /* + * Window Underflow optimized trap table entry + */ +#define WUTRAP(_vector, _handler) \ + mov %wim, %l3 ; \ + sethi %hi(_handler), %l4 ; \ + jmp %l4+%lo(_handler); \ + mov %g0, %wim ! WIM = 0, so that we can restore regardless of WIM + +/* * Software trap. Treat as BAD_TRAP for the time being... */ @@ -82,7 +91,7 @@ SYM(trap_table): BAD_TRAP; ! 03 privileged instruction BAD_TRAP; ! 04 fp disabled WOTRAP(5, SYM(window_overflow_trap_handler)); ! 05 window overflow - TRAP( 6, SYM(window_underflow_trap_handler) );! 06 window underflow + WUTRAP(6, SYM(window_underflow_trap_handler));! 06 window underflow BAD_TRAP; ! 07 memory address not aligned BAD_TRAP; ! 08 fp exception BAD_TRAP; ! 09 data access exception |