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core/cpu: put __builtin_unreachable() into one place

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This commit is contained in:
René Kijewski 2014-05-06 17:43:22 +02:00
parent 5879ccbcd3
commit 6f3d0871aa
5 changed files with 17 additions and 29 deletions
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14
core/include/attributes.h
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@ -56,6 +56,18 @@
#define PURE
#endif
/**
* @def UNREACHABLE()
* @brief Tell the compiler that this line of code cannot be reached.
* @details Most useful in junction with #NORETURN.
* Use this if the compiler cannot tell that e.g.
* an assembler instruction causes a longjmp, or a write causes a reboot.
*/
#if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)) || (__GNUC__ >= 5)
#define UNREACHABLE() __builtin_unreachable()
#else
#define UNREACHABLE() do { /* nothing */ } while (1)
#endif
#endif /* ATTRIBUTES_H_ */
/** @} */

8
cpu/arm_common/crash.c
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@ -63,11 +63,5 @@ NORETURN void core_panic(int crash_code, const char *message)
/* tell the compiler that we won't return from this function
(even if we actually won't even get here...) */
#if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)) || (__GNUC__ >= 5)
__builtin_unreachable();
#else
while (1) {
/* do nothing, but do it often */
}
#endif
UNREACHABLE();
}

8
cpu/lpc1768/crash.c
View File

@ -64,11 +64,5 @@ NORETURN void core_panic(int crash_code, const char *message)
/* tell the compiler that we won't return from this function
(even if we actually won't even get here...) */
#if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)) || (__GNUC__ >= 5)
__builtin_unreachable();
#else
while (1) {
/* do nothing, but do it often */
}
#endif
UNREACHABLE();
}

8
cpu/msp430-common/crash.c
View File

@ -63,11 +63,5 @@ NORETURN void core_panic(int crash_code, const char *message)
/* tell the compiler that we won't return from this function
(even if we actually won't even get here...) */
#if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)) || (__GNUC__ >= 5)
__builtin_unreachable();
#else
while (1) {
/* do nothing, but do it often */
}
#endif
UNREACHABLE();
}

8
cpu/native/crash.c
View File

@ -60,11 +60,5 @@ NORETURN void core_panic(int crash_code, const char *message)
/* tell the compiler that we won't return from this function
(even if we actually won't even get here...) */
#if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)) || (__GNUC__ >= 5)
__builtin_unreachable();
#else
while (1) {
/* do nothing, but do it often */
}
#endif
UNREACHABLE();
}