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| author | Max Filippov <jcmvbkbc@gmail.com> | 2012-11-19 05:30:15 +0100 |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2012-12-19 06:10:22 +0100 |
| commit | 28570e8dac5c86ab10ce2a7e9c02d3aaece63760 (patch) | |
| tree | 29a915825b1851c1377d88bdb008a0eb7993d78f /arch/xtensa/kernel | |
| parent | xtensa: initialize atomctl SR (diff) | |
| download | linux-28570e8dac5c86ab10ce2a7e9c02d3aaece63760.tar.xz linux-28570e8dac5c86ab10ce2a7e9c02d3aaece63760.zip | |
xtensa: add trap_set_handler function
trap_set_handler sets new C-handler in the exception table and returns
previous handler.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/kernel')
| -rw-r--r-- | arch/xtensa/kernel/traps.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c index 5caf2b64d43a..691a792b01d3 100644 --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -293,6 +293,17 @@ do_debug(struct pt_regs *regs) } +/* Set exception C handler - for temporary use when probing exceptions */ + +void * __init trap_set_handler(int cause, void *handler) +{ + unsigned long *entry = &exc_table[EXC_TABLE_DEFAULT / 4 + cause]; + void *previous = (void *)*entry; + *entry = (unsigned long)handler; + return previous; +} + + /* * Initialize dispatch tables. * |