build: add module to handle querying platform details

2026-05-05 21:30:32 +01:00
parent c29465a97d
commit e3a2d6b9d5
27 changed files with 43 additions and 8 deletions
@@ -0,0 +1,37 @@
+#ifndef FX_REFLECTION_DARWIN_ARM64_CALLVM_H_
+#define FX_REFLECTION_DARWIN_ARM64_CALLVM_H_
+
+#include <fx/reflection/function.h>
+#include <fx/value.h>
+#include <stdint.h>
+
+#define MAX_FIXED_ARGS  ((unsigned int)-1)
+#define MAX_DOUBLE_ARGS 8
+#define MAX_INT_ARGS    6
+
+/* dyn-dispatch.S depends on the layout of this struct */
+struct callvm {
+	uint64_t vm_arg_int_count;
+	uint64_t vm_arg_double_count;
+
+	/* any args pushed after this limit is reached will be stored in the
+	 * excess buffer. used for calling varargs functions */
+	uint64_t vm_arg_count, vm_arg_fixed;
+
+	uint64_t vm_arg_excess_count;
+	uint64_t vm_arg_excess_max;
+
+	uintptr_t vm_arg_int[MAX_INT_ARGS];
+	double vm_arg_double[MAX_DOUBLE_ARGS];
+	uintptr_t *vm_arg_excess;
+	uint64_t vm_double_excess_count;
+};
+
+extern void callvm_reset(struct callvm *vm, unsigned int max_fixed_args);
+extern void callvm_push(struct callvm *vm, const fx_value *value);
+extern fx_value callvm_invoke(
+	struct callvm *vm,
+	fx_function_impl impl,
+	fx_value_type return_type);
+
+#endif