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| author | Sonic Zhang <sonic.zhang@analog.com> | 2008-08-05 18:28:26 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-08-05 18:28:26 +0800 |
| commit | d6a29891369827317659b7833170d2f5f0c7b97f (patch) | |
| tree | d93efcc44012c838e8b8f13466c06ee4be20df6d /arch | |
| parent | fe5aeb93024791a5aa69741015db33093198ff47 (diff) | |
| download | blackbird-op-linux-d6a29891369827317659b7833170d2f5f0c7b97f.tar.gz blackbird-op-linux-d6a29891369827317659b7833170d2f5f0c7b97f.zip | |
Blackfin arch: Fix bugs - Make kgdb code apparent to app debugging.
- Skip single step if global interrupt disable bit is set.
- Extend bernds' patch r4673 to skip single step in any interrupt entry
that interrupts the code which is under single stepping. Bernds' patch
only allow user space single stepping.
Singed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index 3db2f4df261b..4bd971e81f1f 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -163,6 +163,8 @@ ENTRY(_ex_single_step) p5.l = lo(IPEND); p5.h = hi(IPEND); r6 = [p5]; + cc = bittst(r6, 4); + if cc jump _bfin_return_from_exception; cc = bittst(r6, 5); if cc jump _bfin_return_from_exception; @@ -186,10 +188,9 @@ ENTRY(_ex_single_step) if cc jump .Ldo_single_step; r6 += -1; cc = r6 < r7; - if cc jump _bfin_return_from_exception; + if cc jump 1f; .Ldo_single_step: -#endif - +#else /* If we were in user mode, do the single step normally. */ p5.l = lo(IPEND); p5.h = hi(IPEND); @@ -198,6 +199,7 @@ ENTRY(_ex_single_step) r7 = r7 & r6; cc = r7 == 0; if !cc jump 1f; +#endif /* Single stepping only a single instruction, so clear the trace * bit here. */ |
