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-id = 1878
-title = "QEMU doesn't implement ARMv4/v5 legacy SCTLR.U==0 load-and-rotate unaligned access handling"
-state = "opened"
-created_at = "2023-09-11T14:22:36.971Z"
-closed_at = "n/a"
-labels = ["target: arm"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/1878"
-host-os = "Windows 11 Pro 22H2"
-host-arch = "x64"
-qemu-version = "8.0.94 (v8.1.0-rc4-12032-g74a4cbee04)"
-guest-os = "bare metal software"
-guest-arch = "ARM"
-description = """**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."""
-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 = """**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:
-
-![QEMU.png](/uploads/51ecbf1689d36f969cb482f2613ccb58/QEMU.png)
-
-Real Raspberry Pi 1B+: ![real.jpg](/uploads/2a9cc3f4bc33d7f254c549e5086070a7/real.jpg)
-
-[kernel_qemu.img](/uploads/ae6a7490660569d5fe56adc9f4dde85d/kernel_qemu.img) [kernel.img](/uploads/48c94a66370c1fe8720fe89603c45c7b/kernel.img)"""