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author | William Joye <wjoye@cfa.harvard.edu> | 2017-05-02 16:06:33 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2017-05-02 16:06:33 (GMT) |
commit | 335ca9eb0d2337314cbbec5eb19f9aeea0eaaca7 (patch) | |
tree | 0a0e8d65ee114cb89f58c3159488dd5523123309 /openssl/bugs/ultrixcc.c | |
parent | a90d8737b83a4a5bb2bf91a9bdf48a3dad4b51fa (diff) | |
download | blt-335ca9eb0d2337314cbbec5eb19f9aeea0eaaca7.zip blt-335ca9eb0d2337314cbbec5eb19f9aeea0eaaca7.tar.gz blt-335ca9eb0d2337314cbbec5eb19f9aeea0eaaca7.tar.bz2 |
initial commit
Diffstat (limited to 'openssl/bugs/ultrixcc.c')
-rw-r--r-- | openssl/bugs/ultrixcc.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/openssl/bugs/ultrixcc.c b/openssl/bugs/ultrixcc.c new file mode 100644 index 0000000..6e24549 --- /dev/null +++ b/openssl/bugs/ultrixcc.c @@ -0,0 +1,44 @@ +#include <stdio.h> + +/*- + * This is a cc optimiser bug for ultrix 4.3, mips CPU. + * What happens is that the compiler, due to the (a)&7, + * does + * i=a&7; + * i--; + * i*=4; + * Then uses i as the offset into a jump table. + * The problem is that a value of 0 generates an offset of + * 0xfffffffc. + */ + +main() +{ + f(5); + f(0); +} + +int f(a) +int a; +{ + switch (a & 7) { + case 7: + printf("7\n"); + case 6: + printf("6\n"); + case 5: + printf("5\n"); + case 4: + printf("4\n"); + case 3: + printf("3\n"); + case 2: + printf("2\n"); + case 1: + printf("1\n"); +#ifdef FIX_BUG + case 0: + ; +#endif + } +} |