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authorSonic Zhang <sonic.zhang@analog.com>2008-11-18 17:48:22 +0800
committerBryan Wu <cooloney@kernel.org>2008-11-18 17:48:22 +0800
commit8a0e9acfd153cf5c726f010b075a3d4d55f80895 (patch)
tree8ba08c1f2ae8c13130ea1894035ffd42fa691a09 /arch/blackfin/kernel/kgdb.c
parent0b82e27444f4c186e931ecc97c9a8dae07128078 (diff)
Blackfin arch: Fix bug - hardware breakpoint doesn't always work in kgdb
Hardware breakpoint doesn't always work in kgdb. It works at the first two times, but if you repeatedly trigger that hardware breakpoint, it would slip over that point once in two times. Fix it by always setting hw bp skip to 0. gdb does skip after hw bp trap. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel/kgdb.c')
-rw-r--r--arch/blackfin/kernel/kgdb.c12
1 files changed, 1 insertions, 11 deletions
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index ab4022131a2..0c4c53fa723 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -219,6 +219,7 @@ int bfin_set_hw_break(unsigned long addr, int len, enum kgdb_bptype type)
if (bfin_type == breakinfo[breakno].type
&& !breakinfo[breakno].occupied) {
breakinfo[breakno].occupied = 1;
+ breakinfo[breakno].skip = 0;
breakinfo[breakno].enabled = 1;
breakinfo[breakno].addr = addr;
breakinfo[breakno].dataacc = dataacc;
@@ -426,17 +427,6 @@ int kgdb_arch_handle_exception(int vector, int signo,
kgdb_single_step = i + 1;
}
- if (vector == VEC_WATCH) {
- wp_status = bfin_read_WPSTAT();
- for (breakno = 0; breakno < HW_WATCHPOINT_NUM; breakno++) {
- if (wp_status & (1 << breakno)) {
- breakinfo->skip = 1;
- break;
- }
- }
- bfin_write_WPSTAT(0);
- }
-
bfin_correct_hw_break();
return 0;