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-id = 1850
-title = "AARCH64 Illegal Instruction (CurrentEL)"
-state = "closed"
-created_at = "2023-08-28T16:52:43.798Z"
-closed_at = "2023-08-28T18:30:08.582Z"
-labels = ["Closed::Invalid", "target: arm"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/1850"
-host-os = "Ubuntu 22.04.2 LTS"
-host-arch = "x86"
-qemu-version = "6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.12)"
-guest-os = "Alpine (3.18.0)"
-guest-arch = "aarch64"
-description = """While emulating Aarch64 in QEMU, whenever the instruction `CurrentEL` is executed,
-QEMU crashes with the following message.
-
-`qemu: uncaught target signal 4 (Illegal instruction) - core dumped
-Illegal instruction (core dumped)`
-
-I've tried both QEMU user space translation (qemu-aarch64-static) and QEMU emulation (qemu-system-aarch64),
-and both fail with the above message.
-
-C Code to reproduce bug, courtesy of https://github.com/cirosantilli/linux-kernel-module-cheat/blob/35684b1b7e0a04a68987056cb15abd97e3d2f0cc/baremetal/arch/aarch64/el.c
-```
-#include <stdio.h>
-#include <inttypes.h>
-
-int main(void) {
-        register uint64_t x0 __asm__ ("x0");
-\t__asm__ ("mrs x0, CurrentEL;" : : : "%x0");
-\tprintf("%" PRIu64 "\\n", x0 >> 2);
-\treturn 0;
-}
-```"""
-reproduce = """1. Copy C code above into file.
-2. Compile code `gcc ./main.c --static`
-3. Execute elf bin `./a.out`"""
-additional = """"""