plugins: add userdata to qemu_plugin_register_vcpu_syscall_cb
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Link: https://lore.kernel.org/qemu-devel/20260615193526.2883349-19-pierrick.bouvier@oss.qualcomm.com Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Pierrick Bouvier committed
Jun 15, 2026 at 12:35 UTC
1abe87fd5924b1ecd023f332b5241d9100e83522
4 files changed
+13
-7
include/plugins/qemu-plugin.h
+6
-2
@@ -840,12 +840,14 @@ void qemu_plugin_update_ns(const void *handle, int64_t time);
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* @a6: the 6th syscall argument
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* @a7: the 7th syscall argument
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* @a8: the 8th syscall argument
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+ * @userdata: user data for callback
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*/
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typedef void
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(*qemu_plugin_vcpu_syscall_cb_t)(unsigned int vcpu_index,
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int64_t num, uint64_t a1, uint64_t a2,
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uint64_t a3, uint64_t a4, uint64_t a5,
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- uint64_t a6, uint64_t a7, uint64_t a8);
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+ uint64_t a6, uint64_t a7, uint64_t a8,
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+ void *userdata);
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/**
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* typedef qemu_plugin_vcpu_syscall_filter_cb_t - vCPU syscall filter callback
@@ -891,13 +893,15 @@ typedef void
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* qemu_plugin_register_vcpu_syscall_cb() - register a syscall entry callback
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* @id: plugin id
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* @cb: callback of type qemu_plugin_vcpu_syscall_cb_t
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+ * @userdata: user data for callback
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*
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* This registers a callback for every syscall executed by the guest. The @cb
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* function is executed before a syscall is handled by the host.
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*/
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QEMU_PLUGIN_API
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void qemu_plugin_register_vcpu_syscall_cb(qemu_plugin_id_t id,
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- qemu_plugin_vcpu_syscall_cb_t cb);
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+ qemu_plugin_vcpu_syscall_cb_t cb,
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+ void *userdata);
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/**
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* qemu_plugin_register_vcpu_syscall_filter_cb() - register a syscall filter
plugins/api.c
+3
-2
@@ -202,9 +202,10 @@ void qemu_plugin_register_vcpu_tb_trans_cb(qemu_plugin_id_t id,
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}
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void qemu_plugin_register_vcpu_syscall_cb(qemu_plugin_id_t id,
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- qemu_plugin_vcpu_syscall_cb_t cb)
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+ qemu_plugin_vcpu_syscall_cb_t cb,
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+ void *userdata)
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{
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- plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_SYSCALL, cb);
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+ plugin_register_cb_udata(id, QEMU_PLUGIN_EV_VCPU_SYSCALL, cb, userdata);
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}
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void
plugins/core.c
+1
-1
@@ -534,7 +534,7 @@ qemu_plugin_vcpu_syscall(CPUState *cpu, int64_t num, uint64_t a1, uint64_t a2,
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qemu_plugin_vcpu_syscall_cb_t func = cb->f.vcpu_syscall;
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qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS_PC);
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- func(cpu->cpu_index, num, a1, a2, a3, a4, a5, a6, a7, a8);
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+ func(cpu->cpu_index, num, a1, a2, a3, a4, a5, a6, a7, a8, cb->udata);
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qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS);
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}
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}
tests/tcg/plugins/syscall.c
+3
-2
@@ -128,7 +128,8 @@ static void hexdump(const GByteArray *data)
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static void vcpu_syscall(unsigned int vcpu_index,
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int64_t num, uint64_t a1, uint64_t a2,
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uint64_t a3, uint64_t a4, uint64_t a5,
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- uint64_t a6, uint64_t a7, uint64_t a8)
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+ uint64_t a6, uint64_t a7, uint64_t a8,
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+ void *userdata)
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{
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if (statistics) {
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SyscallStats *entry;
@@ -271,7 +272,7 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
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memory_buffer = g_byte_array_new();
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}
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- qemu_plugin_register_vcpu_syscall_cb(id, vcpu_syscall);
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+ qemu_plugin_register_vcpu_syscall_cb(id, vcpu_syscall, NULL);
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qemu_plugin_register_vcpu_syscall_ret_cb(id, vcpu_syscall_ret);
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qemu_plugin_register_vcpu_syscall_filter_cb(id, vcpu_syscall_filter);
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qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);