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Diffstat (limited to 'results/classifier/118/graphic/1878')
| -rw-r--r-- | results/classifier/118/graphic/1878 | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/results/classifier/118/graphic/1878 b/results/classifier/118/graphic/1878 new file mode 100644 index 000000000..abc446927 --- /dev/null +++ b/results/classifier/118/graphic/1878 @@ -0,0 +1,59 @@ +graphic: 0.927 +kernel: 0.885 +device: 0.848 +architecture: 0.836 +performance: 0.816 +files: 0.805 +arm: 0.786 +semantic: 0.754 +network: 0.672 +debug: 0.671 +socket: 0.650 +permissions: 0.621 +user-level: 0.607 +register: 0.593 +peripherals: 0.579 +PID: 0.571 +mistranslation: 0.563 +ppc: 0.514 +boot: 0.500 +vnc: 0.498 +assembly: 0.480 +x86: 0.454 +risc-v: 0.443 +hypervisor: 0.413 +VMM: 0.333 +i386: 0.232 +KVM: 0.222 +TCG: 0.221 +virtual: 0.144 + +QEMU doesn't implement ARMv4/v5 legacy SCTLR.U==0 load-and-rotate unaligned access handling +Description of problem: +**ldr r7, \[r0, r1\]** works differently on real device and QEMU. Probably all **ldr Rd, \[Rs\]** commands works wrongly in QEMU with Raspberry Pi emulation. +Steps to reproduce: +1. Launch the attached software **kernel_qemu.img** in QEMU. +2. Launch the attached software **kerenel.img** on real Raspberry Pi 1B+. +3. Look at the r7. It contains different data. +Additional information: +**kernel_qemu.img** and **kerenel.img** are the same program. It just compiled with different origins - 0x8000 for real device and 0x10000 for QEMU. But code inside the program works at the same addresses. + +r0 = 0x183a4 + +r1 = 0x817 + +**\[r0, r1\]** points to byte 0x42 in memory with such data: + +**0x80 0x15 0x22 \[0x42\] 0x03 0x21 0x87** + +After **ldr r7, \[r0, r1\]** execution real device puts to r7: **0x22158042** + +After **ldr r7, \[r0, r1\]** execution QEMU puts to r7: **0x87210342** + +QEMU: + + + +Real Raspberry Pi 1B+:  + +[kernel_qemu.img](/uploads/ae6a7490660569d5fe56adc9f4dde85d/kernel_qemu.img) [kernel.img](/uploads/48c94a66370c1fe8720fe89603c45c7b/kernel.img) |