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* nios2: rework trap handlerLey Foon Tan2015-04-19
| | | | | | | | | | | | | | Redefine trap handler as below: 0 N/A reserved for system calls 1 SIGUSR1 user-defined signal 1 2 SIGUSR2 user-defined signal 2 3 SIGILL illegal instruction 4..29 reserved (but implemented to raise SIGILL instead of being undefined) 30 SIGTRAP KGDB 31 SIGTRAP trace/breakpoint trap Signed-off-by: Ley Foon Tan <lftan@altera.com>
* nios2: Traps exception handlingLey Foon Tan2014-12-07
This patch contains traps exception handling. Signed-off-by: Ley Foon Tan <lftan@altera.com>