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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues/target_i386/host_missing/accel_missing/1047.toml | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | emulator-bug-study-9260319e7411ff8281700a532caa436f40120ec4.tar.gz emulator-bug-study-9260319e7411ff8281700a532caa436f40120ec4.zip | |
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Diffstat (limited to 'gitlab/issues/target_i386/host_missing/accel_missing/1047.toml')
| -rw-r--r-- | gitlab/issues/target_i386/host_missing/accel_missing/1047.toml | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/gitlab/issues/target_i386/host_missing/accel_missing/1047.toml b/gitlab/issues/target_i386/host_missing/accel_missing/1047.toml deleted file mode 100644 index 82d4b4aa..00000000 --- a/gitlab/issues/target_i386/host_missing/accel_missing/1047.toml +++ /dev/null @@ -1,112 +0,0 @@ -id = 1047 -title = "Single stepping Windows 10 bootloader results in Assertion `ret < cpu->num_ases && ret >= 0' failed." -state = "opened" -created_at = "2022-05-29T20:26:39.099Z" -closed_at = "n/a" -labels = ["target: i386"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1047" -host-os = "Debian 11" -host-arch = "x86_64" -qemu-version = "QEMU emulator version 7.0.0" -guest-os = "Windows 10" -guest-arch = "x64" -description = """When I am trying to debug Windows bootloader, I see an assertion error in QEMU when single stepping some instructions in SeaBIOS. - -``` -qemu-system-i386: ../hw/core/cpu-sysemu.c:77: cpu_asidx_from_attrs: Assertion `ret < cpu->num_ases && ret >= 0' failed. -```""" -reproduce = """1. Download / construct `w.img`, see above -2. Start QEMU using `./qemu-system-i386 --drive media=disk,file=w.img,format=raw,index=1 -s -S -enable-kvm` -3. Start GDB using `gdb --ex 'target remote :::1234' --ex 'hb *0x7c00' --ex c --ex 'si 1000' --ex q` -4. See error message""" -additional = """The GDB script first breaks at 0x7c00, then tries to execute 1000 instructions using single step (`si`). On my machine, after executing around 772 instructions, the assertion error in QEMU happens. -Here is an interactive GDB session on my machine. - -``` -(gdb) hb *0x7c00 -Hardware assisted breakpoint 1 at 0x7c00 -(gdb) c -Continuing. - -Breakpoint 1, 0x00007c00 in ?? () -(gdb) d -Delete all breakpoints? (y or n) y -(gdb) si 770 -0x000f7d7b in ?? () -(gdb) x/10i $eip -=> 0xf7d7b:\tmov $0x7d85,%ebx - 0xf7d80:\tout %al,$0xb2 - 0xf7d82:\tpause - 0xf7d84:\thlt - 0xf7d85:\tmov %bp,%sp - 0xf7d88:\tjmp 0xf7dd1 - 0xf7d8a:\tmov %cx,%si - 0xf7d8d:\tmov $0x1,%ax - 0xf7d91:\tadd %al,(%eax) - 0xf7d93:\tcallw 0x6b66 -(gdb) si -0x000f7d80 in ?? () -(gdb) info reg -eax 0xb5 181 -ecx 0x5678 22136 -edx 0x0 0 -ebx 0x7d85 32133 -esp 0xe96d4 0xe96d4 -ebp 0xfed4 0xfed4 -esi 0xe0346 918342 -edi 0xefd91 982417 -eip 0xf7d80 0xf7d80 -eflags 0x6 [ IOPL=0 PF ] -cs 0x8 8 -ss 0x10 16 -ds 0x10 16 -es 0x10 16 -fs 0x10 16 -gs 0x10 16 -fs_base 0x0 0 -gs_base 0x0 0 -k_gs_base 0x0 0 -cr0 0x11 [ ET PE ] -cr2 0x0 0 -cr3 0x0 [ PDBR=0 PCID=0 ] -cr4 0x0 [ ] -cr8 0x0 0 -efer 0x0 [ ] -... -mxcsr 0x1f80 [ IM DM ZM OM UM PM ] -(gdb) si -0x000f7d82 in ?? () -(gdb) info reg -eax 0xb5 181 -ecx 0x5678 22136 -edx 0x0 0 -ebx 0x7d85 32133 -esp 0xe96d4 0xe96d4 -ebp 0xfed4 0xfed4 -esi 0xe0346 918342 -edi 0xefd91 982417 -eip 0xf7d82 0xf7d82 -eflags 0x6 [ IOPL=0 PF ] -cs 0x8 8 -ss 0x10 16 -ds 0x10 16 -es 0x10 16 -fs 0x10 16 -gs 0x10 16 -fs_base 0x0 0 -gs_base 0x0 0 -k_gs_base 0x0 0 -cr0 0x11 [ ET PE ] -cr2 0x0 0 -cr3 0x0 [ PDBR=0 PCID=0 ] -cr4 0x0 [ ] -cr8 0x0 0 -efer 0x0 [ ] -... -mxcsr 0x1f80 [ IM DM ZM OM UM PM ] -(gdb) si -Remote connection closed -(gdb) -``` - -This bug was first incorrectly filed in KVM's bug tracker at <https://bugzilla.kernel.org/show_bug.cgi?id=216003>.""" |