From 766e00bd570f54c8d08023a46cd3386e96ecd39f Mon Sep 17 00:00:00 2001 From: Rowan Hart Date: Fri, 27 Jun 2025 12:25:03 +0100 Subject: plugins: Add enforcement of QEMU_PLUGIN_CB flags in register R/W callbacks MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds functionality to enforce the requested QEMU_PLUGIN_CB_ flags level passed when registering a callback function using the plugins API. Each time a callback is about to be invoked, a thread-local variable will be updated with the level that callback requested. Then, called API functions (in particular, the register read and write API) will call qemu_plugin_get_cb_flags() to check the level is at least the level they require. Reviewed-by: Pierrick Bouvier Signed-off-by: Rowan Hart Message-ID: <20250624175351.440780-4-rowanbhart@gmail.com> Signed-off-by: Alex Bennée Message-ID: <20250627112512.1880708-8-alex.bennee@linaro.org> --- plugins/api.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'plugins/api.c') diff --git a/plugins/api.c b/plugins/api.c index 6514f2c76a..3f04399c26 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -437,6 +437,10 @@ int qemu_plugin_read_register(struct qemu_plugin_register *reg, GByteArray *buf) { g_assert(current_cpu); + if (qemu_plugin_get_cb_flags() == QEMU_PLUGIN_CB_NO_REGS) { + return -1; + } + return gdb_read_register(current_cpu, buf, GPOINTER_TO_INT(reg) - 1); } -- cgit 1.4.1