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 eb8e3c43a4..b7067b32bd 100644 --- a/c/src/lib/libbsp/sparc/shared/start/start.S +++ b/c/src/lib/libbsp/sparc/shared/start/start.S @@ -42,6 +42,15 @@ subcc %g1, 3, %g0; ! prepare for syscall 3 check /* + * Window Overflow optimized trap table entry + */ +#define WOTRAP(_vector, _handler) \ + sethi %hi(_handler), %l4; \ + jmp %l4+%lo(_handler); \ + save; \ + nop + +/* * Software trap. Treat as BAD_TRAP for the time being... */ @@ -72,7 +81,7 @@ SYM(trap_table): BAD_TRAP; ! 02 illegal instruction BAD_TRAP; ! 03 privileged instruction BAD_TRAP; ! 04 fp disabled - TRAP( 5, SYM(window_overflow_trap_handler) ); ! 05 window overflow + WOTRAP(5, SYM(window_overflow_trap_handler)); ! 05 window overflow TRAP( 6, SYM(window_underflow_trap_handler) );! 06 window underflow BAD_TRAP; ! 07 memory address not aligned BAD_TRAP; ! 08 fp exception |