Okay, so I'm looking at this bug report about QEMU crashing when running binaries using qemu-i386. The user provided some details and backtraces from different versions of QEMU. Let me try to understand what's going on. First, they mentioned that any binary compiled with GOARCH=386 using TinyGo crashes with a segmentation fault. They tried both Go and TinyGo binaries, and the latter shows an internal Go error about mallocgc. That suggests something is wrong in the environment where the program runs because Go relies heavily on proper memory management. Looking at the backtraces, especially from QEMU 5.2.0, it seems that the issue arises during the translation of instructions. The backtrace points to functions like translator_loop and gen_intermediate_code, which are part of the TCG (Translation-Cache-Based Generator) in QEMU. Specifically, it's failing at cpu_ldub_code, which is a function for loading an unsigned byte from memory with address checking. In the 7.0.0 version backtrace, it's crashing in cpu_ldub_code as well, trying to load a byte but accessing an invalid address (0x8000), which is likely causing the segmentation fault. The older version's backtrace shows that it's failing at x86_ldub_code during disas_insn, indicating an issue with how instructions are being translated. Considering these points, it seems like the problem isn't with a specific system call or instruction handling but rather with how QEMU is translating and executing the code. The crash occurs in the runtime execution of the translated code, specifically when trying to access memory that's not properly set up or protected. The fact that other architectures (x86_64 and arm) work fine suggests that this is specific to the i386 target. It might be related to how QEMU handles user mode emulation for 32-bit x86, perhaps missing some setup or protection mechanism like VDSO (Virtual Dynamic Shared Object), which provides certain system calls in a virtualized environment. The user mentioned "qemu-i386 missing VDSO," which could mean that the i386 user-mode emulator isn't correctly setting up the necessary virtual shared objects, leading to incorrect memory accesses or missing required components for proper execution. Without VDSO, certain system calls might not be handled correctly, causing crashes. So, putting this together, the bug is related to how QEMU's i386 user-mode emulation handles runtime execution, possibly due to a missing setup of VDSO or incorrect memory management during translation. runtime