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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:24:58 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:27:06 +0000 |
| commit | 33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch) | |
| tree | 406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1349277 | |
| parent | adedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff) | |
| download | qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip | |
add launchpad bug reports without comments
Diffstat (limited to 'results/scraper/launchpad-without-comments/1349277')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1349277 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1349277 b/results/scraper/launchpad-without-comments/1349277 new file mode 100644 index 000000000..2c81012e1 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1349277 @@ -0,0 +1,17 @@ +AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater + +The AArch64 emulation ignores SPSel=0 when: + +(1) taking an interrupt from an exception level greater than EL0 (e.g., EL1t), + +(2) returning from an exception (via ERET) to an exception level greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0. + +The attached patch fixes the problem in my application. + +Background: + +I'm running a standalone application (toy OS) that is performing preemptive multithreading between threads running at EL1t, with exception handling / context switching occurring at EL1h. This bug causes the stack pointer to be corrupted in the threads running at EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)). + +Occurs in: + qemu-2.1.0-rc1 (found in) + commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master) \ No newline at end of file |