From 33606b41d35115f887ea688b1a16f2ff85bf2fe4 Mon Sep 17 00:00:00 2001 From: Christian Krinitsin Date: Mon, 30 Jun 2025 12:24:58 +0000 Subject: add launchpad bug reports without comments --- results/scraper/launchpad-without-comments/757702 | 3 +++ 1 file changed, 3 insertions(+) create mode 100644 results/scraper/launchpad-without-comments/757702 (limited to 'results/scraper/launchpad-without-comments/757702') diff --git a/results/scraper/launchpad-without-comments/757702 b/results/scraper/launchpad-without-comments/757702 new file mode 100644 index 00000000..b0bc130c --- /dev/null +++ b/results/scraper/launchpad-without-comments/757702 @@ -0,0 +1,3 @@ +ARM: singlestepping insn which UNDEFs should stop at UNDEF vector insn, not after it + +ARMv7a has lot of undefined instruction from its instruction opcode space. This undefined instructions are very useful for replacing sensitive non-priviledged instructions of guest operating systems (virtualization). The undefined instruction exception executes at + 0x4, where can be 0x0 or 0xfff00000. Currently, in qemu 0.14.0 undefined instruction fault at 0x8 offset instead of 0x4. This was not a problem with qemu 0.13.0, seems like this is a new bug. As as example, if we try to execute value "0xec019800" in qemu 0.14.0 then it should cause undefined exception at +0x4 since "0xec019800" is an undefined instruction. \ No newline at end of file -- cgit v1.2.3