projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 5a4f7c66 PM |
1 | #include <linux/bug.h> |
| 2 | #include <linux/io.h> | |
| 3 | #include <linux/types.h> | |
| 4 | #include <linux/kdebug.h> | |
| 5 | #include <asm/system.h> | |
| 6 | ||
| 7 | #ifdef CONFIG_BUG | |
| 8 | static void handle_BUG(struct pt_regs *regs) | |
| 9 | { | |
| 10 | enum bug_trap_type tt; | |
| 11 | tt = report_bug(regs->pc, regs); | |
| 12 | if (tt == BUG_TRAP_TYPE_WARN) { | |
| 13 | regs->pc += instruction_size(regs->pc); | |
| 14 | return; | |
| 15 | } | |
| 16 | ||
| 17 | die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff); | |
| 18 | } | |
| 19 | ||
| 20 | int is_valid_bugaddr(unsigned long addr) | |
| 21 | { | |
| 22 | return addr >= PAGE_OFFSET; | |
| 23 | } | |
| 24 | #endif | |
| 25 | ||
| 26 | /* | |
| 27 | * Generic trap handler. | |
| 28 | */ | |
| 29 | BUILD_TRAP_HANDLER(debug) | |
| 30 | { | |
| 31 | TRAP_HANDLER_DECL; | |
| 32 | ||
| 33 | /* Rewind */ | |
| 34 | regs->pc -= instruction_size(ctrl_inw(regs->pc - 4)); | |
| 35 | ||
| 36 | if (notify_die(DIE_TRAP, "debug trap", regs, 0, vec & 0xff, | |
| 37 | SIGTRAP) == NOTIFY_STOP) | |
| 38 | return; | |
| 39 | ||
| 40 | force_sig(SIGTRAP, current); | |
| 41 | } | |
| 42 | ||
| 43 | /* | |
| 44 | * Special handler for BUG() traps. | |
| 45 | */ | |
| 46 | BUILD_TRAP_HANDLER(bug) | |
| 47 | { | |
| 48 | TRAP_HANDLER_DECL; | |
| 49 | ||
| 50 | /* Rewind */ | |
| 51 | regs->pc -= instruction_size(ctrl_inw(regs->pc - 4)); | |
| 52 | ||
| 53 | if (notify_die(DIE_TRAP, "bug trap", regs, 0, TRAPA_BUG_OPCODE & 0xff, | |
| 54 | SIGTRAP) == NOTIFY_STOP) | |
| 55 | return; | |
| 56 | ||
| 57 | #ifdef CONFIG_BUG | |
| 58 | if (__kernel_text_address(instruction_pointer(regs))) { | |
| 59 | opcode_t insn = *(opcode_t *)instruction_pointer(regs); | |
| 60 | if (insn == TRAPA_BUG_OPCODE) | |
| 61 | handle_BUG(regs); | |
| 62 | } | |
| 63 | #endif | |
| 64 | ||
| 65 | force_sig(SIGTRAP, current); | |
| 66 | } |