net: Clean up explicit ->tx_queue references in link watch.
[linux-2.6] / arch / sh / kernel / traps.c
1 #include <linux/bug.h>
2 #include <linux/io.h>
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>
9
10 #ifdef CONFIG_BUG
11 static void handle_BUG(struct pt_regs *regs)
12 {
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);
17                 return;
18         }
19
20         die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff);
21 }
22
23 int is_valid_bugaddr(unsigned long addr)
24 {
25         unsigned short opcode;
26
27         if (addr < PAGE_OFFSET)
28                 return 0;
29         if (probe_kernel_address((u16 *)addr, opcode))
30                 return 0;
31
32         return opcode == TRAPA_BUG_OPCODE;
33 }
34 #endif
35
36 /*
37  * Generic trap handler.
38  */
39 BUILD_TRAP_HANDLER(debug)
40 {
41         TRAP_HANDLER_DECL;
42
43         /* Rewind */
44         regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
45
46         if (notify_die(DIE_TRAP, "debug trap", regs, 0, vec & 0xff,
47                        SIGTRAP) == NOTIFY_STOP)
48                 return;
49
50         force_sig(SIGTRAP, current);
51 }
52
53 /*
54  * Special handler for BUG() traps.
55  */
56 BUILD_TRAP_HANDLER(bug)
57 {
58         TRAP_HANDLER_DECL;
59
60         /* Rewind */
61         regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
62
63         if (notify_die(DIE_TRAP, "bug trap", regs, 0, TRAPA_BUG_OPCODE & 0xff,
64                        SIGTRAP) == NOTIFY_STOP)
65                 return;
66
67 #ifdef CONFIG_BUG
68         if (__kernel_text_address(instruction_pointer(regs))) {
69                 opcode_t insn = *(opcode_t *)instruction_pointer(regs);
70                 if (insn == TRAPA_BUG_OPCODE)
71                         handle_BUG(regs);
72         }
73 #endif
74
75         force_sig(SIGTRAP, current);
76 }