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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/assembly/1350
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloademulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+Regression in 7.2.0rc3: No snow by efi firmware in advent calendar 2020, door 15 anymore
+Description of problem:
+Advent calendar 2020, door 15 is expected to produce snow on the terminal while executing the provided efi firmware:
+
+> snow in micropython on slimbootloader by eldon
+> -------------------------------------------
+> 
+> Today's advent is a custom efi firmware build of a new bootloader from intel called
+> slimbootloader[1], a recent project by intel which has adapted micropython[2] as a 
+> utility for configuration and board testing. This build, however, will show snowfall on
+> the console for a while. Eventually an exception drops the firmware into the micropython
+> repl.
+> 
+> [1] https://slimbootloader.github.io/supported-hardware/qemu.html
+> [2] http://docs.micropython.org/en/latest/index.html
+
+
+Snow does not fall anymore as it did with 7.1.0, it seems like execution is stopped/not started
+Steps to reproduce:
+- Build & Install from git source
+    ```
+    /home/helge/qemu-project/qemu/configure --prefix=/home/helge/qemu-project/install \
+      --target-list=x86_64-softmmu --disable-linux-user
+    make -j2
+    make install
+    ```
+ - Execute 
+   ```
+   PATH="/home/helge/qemu-project/install/bin" qemu-system-x86_64 \
+      -m 256M -machine q35 -serial mon:stdio -vga none \
+      -drive if=pflash,format=raw,file=snow.bin -boot a
+   ```
+Additional information:
+Performing git bisect starting with tag v7.1.0 as good and tag v7.2.0-rc3 as bad reveals 92ec056a6b2fc5d5a5593121c5d9475d2a2461d6 as culprit:
+   ```
+$ git bisect start c4ffd91aba1c3d878e99a3e7ba8aad4826728ece 621da7789083b80d6f1ff1c0fb499334007b4f51
+binäre Suche: danach noch 965 Commits zum Testen übrig (ungefähr 10 Schritte)
+[2ba341b3694cf3cff7b8a1df4cc765900d5c4f60] Merge tag 'kraxel-20221013-pull-request' of https://gitlab.com/kraxel/qemu into staging
+$ git bisect good
+binäre Suche: danach noch 482 Commits zum Testen übrig (ungefähr 9 Schritte)
+[05c049f12b88370de7289bf39b14088c7d656caa] hw/isa/piix3: Remove extra ';' outside of functions
+$ git bisect bad
+binäre Suche: danach noch 228 Commits zum Testen übrig (ungefähr 8 Schritte)
+[08a5d04606292b3cf6f5756bf2a095654a290626] Merge tag 'pull-tcg-20221026' of https://gitlab.com/rth7680/qemu into staging
+$ git bisect bad
+binäre Suche: danach noch 126 Commits zum Testen übrig (ungefähr 7 Schritte)
+[168122419ed1c4087748e21131a523c6d9b632e1] target/arm: Change gen_goto_tb to work on displacements
+$ git bisect bad
+binäre Suche: danach noch 69 Commits zum Testen übrig (ungefähr 6 Schritte)
+[2c65091fd9d387b8dca8115dbdd9c3c61f658a9e] Merge tag 'pull-ppc-20221017' of https://gitlab.com/danielhb/qemu into staging
+$ git bisect good
+binäre Suche: danach noch 34 Commits zum Testen übrig (ungefähr 5 Schritte)
+[92ec056a6b2fc5d5a5593121c5d9475d2a2461d6] target/i386: reimplement 0x0f 0x60-0x6f, add AVX
+$ git bisect bad
+binäre Suche: danach noch 17 Commits zum Testen übrig (ungefähr 4 Schritte)
+[8629e77be5f8106b3497cc197fbd57a12ae6333f] target/i386: Use probe_access_full for final stage2 translation
+$ git bisect good
+binäre Suche: danach noch 8 Commits zum Testen übrig (ungefähr 3 Schritte)
+[20581aadec5e5a9d6836e4612b6f44a7cbda7d16] target/i386: validate VEX prefixes via the instructions' exception classes
+$ git bisect good
+binäre Suche: danach noch 4 Commits zum Testen übrig (ungefähr 2 Schritte)
+[f05f9789f57d5394fc118fe31aa2a9f563311140] target/i386: extend helpers to support VEX.V 3- and 4- operand encodings
+$ git bisect good
+binäre Suche: danach noch 2 Commits zum Testen übrig (ungefähr 1 Schritt)
+[620f75566a5d81d7b82b3788b83d0b95c7d21dcd] target/i386: provide 3-operand versions of unary scalar helpers
+$ git bisect good
+binäre Suche: danach noch 0 Commits zum Testen übrig (ungefähr 1 Schritt)
+[b98f886c8f8661773047197d132efec97810b37a] target/i386: Introduce 256-bit vector helpers
+$ git bisect good
+92ec056a6b2fc5d5a5593121c5d9475d2a2461d6 is the first bad commit
+commit 92ec056a6b2fc5d5a5593121c5d9475d2a2461d6
+Author: Paolo Bonzini <pbonzini@redhat.com>
+Date:   Tue Sep 20 05:42:45 2022 -0400
+
+    target/i386: reimplement 0x0f 0x60-0x6f, add AVX
+    
+    These are both MMX and SSE/AVX instructions, except for vmovdqu.  In both
+    cases the inputs and output is in s->ptr{0,1,2}, so the only difference
+    between MMX, SSE, and AVX is which helper to call.
+    
+    Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
+    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+
+ target/i386/tcg/decode-new.c.inc |  42 ++++++++
+ target/i386/tcg/emit.c.inc       | 202 +++++++++++++++++++++++++++++++++++++++
+ target/i386/tcg/translate.c      |  19 +++-
+ 3 files changed, 262 insertions(+), 1 deletion(-)
+
+   ```