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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:24:58 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:27:06 +0000
commit33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch)
tree406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1783437
parentadedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff)
downloadqemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz
qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip
add launchpad bug reports without comments
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+read-modify-write page faults error code has write bit unset
+
+Consider the attached C file, which does a read-modify-write of the form `add [mem], reg`, where `mem` points to a non-present page. In the resulting page fault, the W/R bit is not set, while real hardware does set this bit.
+
+% gcc -m32 qemu-bug1.c&& ./a.out && qemu-i386 ./a.out
+page fault: addr=0x70000000 err=0x6
+page fault: addr=0x70000000 err=0x4
+
+Tested on the qemu-3.0.0-rc1 release.
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