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authorJason Wessel <jason.wessel@windriver.com>2010-05-20 21:04:20 -0500
committerJason Wessel <jason.wessel@windriver.com>2010-05-20 21:04:20 -0500
commit489022cc86ec8817a30226d00d35c67d74dd24a0 (patch)
tree4390b147ff1d1bbd554f263e078e427456ddafb5 /arch/sh/kernel/kgdb.c
parentc75fbb05b523571c0fdc48d4b968b73f0e20acbb (diff)
downloadop-kernel-dev-489022cc86ec8817a30226d00d35c67d74dd24a0.zip
op-kernel-dev-489022cc86ec8817a30226d00d35c67d74dd24a0.tar.gz
kgdb,sh: update superh kgdb exception handling
Implement kgdb_arch_pc() which adjusts the pc if it needs to be adjusted after a software breakpoint trap. Implement kgdb_arch_set_pc() which is a new required function in the kgdb debug core. When processing a single step return zero in the error exception field so that the debug core can distinguish between a single step trap and a breakpoint trap generically. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/kgdb.c')
-rw-r--r--arch/sh/kernel/kgdb.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
index 70c6965..efb6d39 100644
--- a/arch/sh/kernel/kgdb.c
+++ b/arch/sh/kernel/kgdb.c
@@ -237,6 +237,18 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
return -1;
}
+unsigned long kgdb_arch_pc(int exception, struct pt_regs *regs)
+{
+ if (exception == 60)
+ return instruction_pointer(regs) - 2;
+ return instruction_pointer(regs);
+}
+
+void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
+{
+ regs->pc = ip;
+}
+
/*
* The primary entry points for the kgdb debug trap table entries.
*/
@@ -247,7 +259,7 @@ BUILD_TRAP_HANDLER(singlestep)
local_irq_save(flags);
regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
- kgdb_handle_exception(vec >> 2, SIGTRAP, 0, regs);
+ kgdb_handle_exception(0, SIGTRAP, 0, regs);
local_irq_restore(flags);
}
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