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The syscall return value passed back through the syscall filter callback is semantically signed: negative values encode errno codes. Declaring the sysret pointer as uint64_t * is therefore misleading and forces callers to launder the value through an unsigned temporary. Change the sysret pointer to int64_t * across the public plugin API typedef (qemu_plugin_vcpu_syscall_filter_cb_t), the internal qemu_plugin_vcpu_syscall_filter() prototypes and stub, its implementation in plugins/core.c, the linux-user caller, and the in-tree example plugins. Signed-off-by: Ziyang Zhang <functioner@sjtu.edu.cn> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com> Link: https://lore.kernel.org/qemu-devel/20260618082426.790315-2-functioner@sjtu.edu.cn Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
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"