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Diffstat (limited to 'results/scraper/launchpad-without-comments/1095857')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1095857 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1095857 b/results/scraper/launchpad-without-comments/1095857 new file mode 100644 index 000000000..48aa4fb8e --- /dev/null +++ b/results/scraper/launchpad-without-comments/1095857 @@ -0,0 +1,11 @@ +incorrect handling of [r32] address (long mode) + +while executing in Long Mode (x86-64) instructions such as + +mov eax,[r15d] + +end up executing as + +mov eax,[r15] + +according to x86 programmer manuals the behavior of using the Address-Size override (in long mode) is supposed to ignore the high 32bits of the register. I use this fact in my operating system to reduce register usage (the high 32 bits of r15 holds other data). consequently a general protection exception occurs since the memory address isn't "canonical". this error doesn't always appear since the high 32 bits might not be zero in those conditions. \ No newline at end of file |