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The test-arm-iwmmmxt test isn't testing what it thinks it's testing. If you run it with a CPU type that supports iwMMXt then it will crash immediately with a SIGILL, because (even with -marm) GCC will link it against startup code that is in Thumb mode, and no iwMMXt CPU has Thumb: 00010338 <_start>: 10338: f04f 0b00 mov.w fp, #0 1033c: f04f 0e00 mov.w lr, #0 If you run it with a CPU type which does *not* support iwMMXt, which is what 'make check-tcg' does, then QEMU will not try to handle the insns as iwMMXt. Instead the translator turns them into illegal instructions. Then in the linux-user cpu_loop() code we identify them as FPA11 instructions inside emulate_arm_fpa11(), because the FPA11 happened to use the same coprocessor number as these iwMMXt insns. So we execute a completely different set of FPA11 insns, which means we don't crash, but we will print garbage to stdout. Then the test binary always exits with a 0 return code, so 'make check-tcg' thinks the test passes. Modern gnueabihf toolchains assume in their startup code that the CPU is not so old as to not support Thumb, so there's no way to get them to generate a binary that actually does what the test wants. Since we're deprecating iwMMXt emulation anyway, it's not worth trying to salvage the test case to get it to really test the iwMMXt insns. Delete the test entirely. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-id: 20250127112715.2936555-3-peter.maydell@linaro.org |
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| aarch64 | ||
| aarch64_be | ||
| alpha | ||
| arm | ||
| hexagon | ||
| hppa | ||
| i386 | ||
| loongarch64 | ||
| m68k | ||
| minilib | ||
| mips | ||
| multiarch | ||
| openrisc | ||
| plugins | ||
| ppc64 | ||
| ppc64le | ||
| riscv64 | ||
| s390x | ||
| sh4 | ||
| tricore | ||
| x86_64 | ||
| xtensa | ||
| xtensaeb | ||
| Makefile.target | ||
| README | ||
This directory contains various interesting guest binaries for regression testing the Tiny Code Generator doing system and user-mode emulation. The multiarch directory contains shared code for tests that can be built for all guest architectures. Architecture specific code can be found in their respective directories. System mode tests will be under the "system" subdirectories. GDB scripts for exercising the gdbstub on specific tests will be found under the "gdbstb" subdirectories. See the developer guide for more instructions on "make check-tcg"