projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 0dfb8c35 JN |
2 | #ifndef __ASM_CRISv10_ARCH_BUG_H |
| 3 | #define __ASM_CRISv10_ARCH_BUG_H | |
| 4 | ||
| 5 | #include <linux/stringify.h> | |
| 6 | ||
| 7 | #ifdef CONFIG_BUG | |
| 8 | #ifdef CONFIG_DEBUG_BUGVERBOSE | |
| 9 | /* The BUG() macro is used for marking obviously incorrect code paths. | |
| 10 | * It will cause a message with the file name and line number to be printed, | |
| 11 | * and then cause an oops. The message is actually printed by handle_BUG() | |
| 12 | * in arch/cris/kernel/traps.c, and the reason we use this method of storing | |
| 13 | * the file name and line number is that we do not want to affect the registers | |
| 14 | * by calling printk() before causing the oops. | |
| 15 | */ | |
| 16 | ||
| 17 | #define BUG_PREFIX 0x0D7F | |
| 18 | #define BUG_MAGIC 0x00001234 | |
| 19 | ||
| 20 | struct bug_frame { | |
| 21 | unsigned short prefix; | |
| 22 | unsigned int magic; | |
| 23 | unsigned short clear; | |
| 24 | unsigned short movu; | |
| 25 | unsigned short line; | |
| 26 | unsigned short jump; | |
| 27 | unsigned char *filename; | |
| 28 | }; | |
| 29 | ||
| 30 | #if 0 | |
| 31 | /* Unfortunately this version of the macro does not work due to a problem | |
| 32 | * with the compiler (aka a bug) when compiling with -O2, which sometimes | |
| 33 | * erroneously causes the second input to be stored in a register... | |
| 34 | */ | |
| 35 | #define BUG() \ | |
| 36 | __asm__ __volatile__ ("clear.d [" __stringify(BUG_MAGIC) "]\n\t"\ | |
| 37 | "movu.w %0,$r0\n\t" \ | |
| 38 | "jump %1\n\t" \ | |
| 39 | : : "i" (__LINE__), "i" (__FILE__)) | |
| 40 | #else | |
| 41 | /* This version will have to do for now, until the compiler is fixed. | |
| 42 | * The drawbacks of this version are that the file name will appear multiple | |
| 43 | * times in the .rodata section, and that __LINE__ and __FILE__ can probably | |
| 44 | * not be used like this with newer versions of gcc. | |
| 45 | */ | |
| 46 | #define BUG() \ | |
| 173a3efd | 47 | do { \ |
| 0dfb8c35 JN |
48 | __asm__ __volatile__ ("clear.d [" __stringify(BUG_MAGIC) "]\n\t"\ |
| 49 | "movu.w " __stringify(__LINE__) ",$r0\n\t"\ | |
| 50 | "jump 0f\n\t" \ | |
| 51 | ".section .rodata\n" \ | |
| 52 | "0:\t.string \"" __FILE__ "\"\n\t" \ | |
| 173a3efd AB |
53 | ".previous"); \ |
| 54 | unreachable(); \ | |
| 55 | } while (0) | |
| 0dfb8c35 JN |
56 | #endif |
| 57 | ||
| 58 | #else | |
| 59 | ||
| 60 | /* This just causes an oops. */ | |
| 173a3efd AB |
61 | #define BUG() \ |
| 62 | do { \ | |
| 63 | barrier_before_unreachable(); \ | |
| 64 | __builtin_trap(); \ | |
| 65 | } while (0) | |
| 0dfb8c35 JN |
66 | |
| 67 | #endif | |
| 68 | ||
| 69 | #define HAVE_ARCH_BUG | |
| 70 | #endif | |
| 71 | ||
| 72 | #include <asm-generic/bug.h> | |
| 73 | ||
| 74 | #endif |