From 489022cc86ec8817a30226d00d35c67d74dd24a0 Mon Sep 17 00:00:00 2001 From: Jason Wessel Date: Thu, 20 May 2010 21:04:20 -0500 Subject: 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 Acked-by: Paul Mundt --- arch/sh/kernel/kgdb.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c index 70c69659b846..efb6d398dec3 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); } -- cgit v1.2.3