diff options
Diffstat (limited to 'arch/sh/kernel/traps.c')
| -rw-r--r-- | arch/sh/kernel/traps.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c index b3e0067db358..f69bd968fcca 100644 --- a/arch/sh/kernel/traps.c +++ b/arch/sh/kernel/traps.c @@ -5,18 +5,32 @@ #include <linux/signal.h> #include <linux/sched.h> #include <linux/uaccess.h> +#include <asm/unwinder.h> #include <asm/system.h> #ifdef CONFIG_BUG -static void handle_BUG(struct pt_regs *regs) +void handle_BUG(struct pt_regs *regs) { + const struct bug_entry *bug; + unsigned long bugaddr = regs->pc; enum bug_trap_type tt; - tt = report_bug(regs->pc, regs); + + if (!is_valid_bugaddr(bugaddr)) + goto invalid; + + bug = find_bug(bugaddr); + + /* Switch unwinders when unwind_stack() is called */ + if (bug->flags & BUGFLAG_UNWINDER) + unwinder_faulted = 1; + + tt = report_bug(bugaddr, regs); if (tt == BUG_TRAP_TYPE_WARN) { - regs->pc += instruction_size(regs->pc); + regs->pc += instruction_size(bugaddr); return; } +invalid: die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff); } @@ -28,8 +42,10 @@ int is_valid_bugaddr(unsigned long addr) return 0; if (probe_kernel_address((insn_size_t *)addr, opcode)) return 0; + if (opcode == TRAPA_BUG_OPCODE) + return 1; - return opcode == TRAPA_BUG_OPCODE; + return 0; } #endif |