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| author | Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> | 2016-12-02 02:09:23 +0100 |
|---|---|---|
| committer | Stefan Tauner <stefan.tauner@gmx.at> | 2017-10-12 03:50:05 +0200 |
| commit | 51e430392d125ad7b36ec43e1448f3235d221b39 (patch) | |
| tree | be44c2f0cc049d5c822acd9bce422f35b8a94339 /hwaccess.c | |
| parent | 9fbbf55ecb991704cfbb2900ad9b41a1f7647759 (diff) | |
| download | flashrom-git-stable.tar.gz | |
Fix undefined behavior in some preprocessor define checksstable
Macros like the one below would produce undefined behavior when used as
expression/condition in #if preprocessor directives:
This patch replaces all such statements with a more verbose but
well-defined #if/#define x 1/#else/#define x 0/#endif
Found by clang (warning introduced in r258128), reported by Idwer.
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Diffstat (limited to 'hwaccess.c')
| -rw-r--r-- | hwaccess.c | 18 |
1 files changed, 15 insertions, 3 deletions
@@ -37,9 +37,21 @@ #error "Unknown operating system" #endif -#define USE_IOPL (IS_LINUX || IS_MACOSX || defined(__NetBSD__) || defined(__OpenBSD__)) -#define USE_DEV_IO (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)) -#define USE_IOPERM (defined(__gnu_hurd__)) +#if (IS_LINUX || IS_MACOSX || defined(__NetBSD__) || defined(__OpenBSD__)) + #define USE_IOPL (1) +#else + #define USE_IOPL (0) +#endif +#if (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)) + #define USE_DEV_IO (1) +#else + #define USE_DEV_IO (0) +#endif +#if (defined(__gnu_hurd__)) + #define USE_IOPERM (1) +#else + #define USE_IOPERM (0) +#endif #if USE_IOPERM #include <sys/io.h> |