3 #include <linux/types.h>
4 #include <linux/kdebug.h>
5 #include <linux/signal.h>
6 #include <linux/sched.h>
7 #include <linux/uaccess.h>
8 #include <asm/system.h>
11 void handle_BUG(struct pt_regs *regs)
13 enum bug_trap_type tt;
14 tt = report_bug(regs->pc, regs);
15 if (tt == BUG_TRAP_TYPE_WARN) {
16 regs->pc += instruction_size(regs->pc);
20 die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff);
23 int is_valid_bugaddr(unsigned long addr)
27 if (addr < PAGE_OFFSET)
29 if (probe_kernel_address((insn_size_t *)addr, opcode))
32 if (opcode == TRAPA_BUG_OPCODE || opcode == TRAPA_UNWINDER_BUG_OPCODE)
40 * Generic trap handler.
42 BUILD_TRAP_HANDLER(debug)
47 regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
49 if (notify_die(DIE_TRAP, "debug trap", regs, 0, vec & 0xff,
50 SIGTRAP) == NOTIFY_STOP)
53 force_sig(SIGTRAP, current);
57 * Special handler for BUG() traps.
59 BUILD_TRAP_HANDLER(bug)
64 regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
66 if (notify_die(DIE_TRAP, "bug trap", regs, 0, TRAPA_BUG_OPCODE & 0xff,
67 SIGTRAP) == NOTIFY_STOP)
71 if (__kernel_text_address(instruction_pointer(regs))) {
72 insn_size_t insn = *(insn_size_t *)instruction_pointer(regs);
73 if (insn == TRAPA_BUG_OPCODE)
79 force_sig(SIGTRAP, current);