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authorBernd Schmidt <bernds_cb1@t-online.de>2008-05-07 11:41:26 +0800
committerBryan Wu <cooloney@kernel.org>2008-05-07 11:41:26 +0800
commit0893f1250f87e0a832f47bb60fb69ed0d52be7a3 (patch)
tree96dbea09cc618f4e6c4db2a671de215ba6b9784b /include/asm-blackfin/entry.h
parent8513c42edb3f1c91a8418fae11846c87cf7b8581 (diff)
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[Blackfin] arch: fix gdb testing regression
When transferring to IRQ5 from an exception, save SYSCFG in memory across the transfer and clear the trace bit. When we get a single step exception, check whether we can safely clear the trace bit in SYSCFG. We can (and should) clear it after the first instruction of the interrupt handler; the first insn saves SYSCFG to the stack in all handlers. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'include/asm-blackfin/entry.h')
-rw-r--r--include/asm-blackfin/entry.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-blackfin/entry.h b/include/asm-blackfin/entry.h
index 562c6d3a323..c4f721e0d00 100644
--- a/include/asm-blackfin/entry.h
+++ b/include/asm-blackfin/entry.h
@@ -17,6 +17,11 @@
#define PF_DTRACE_OFF 1
#define PF_DTRACE_BIT 5
+/*
+ * NOTE! The single-stepping code assumes that all interrupt handlers
+ * start by saving SYSCFG on the stack with their first instruction.
+ */
+
/* This one is used for exceptions, emulation, and NMI. It doesn't push
RETI and doesn't do cli. */
#define SAVE_ALL_SYS save_context_no_interrupts