9.2.1.1 PrepareForOrdinaryCall ( F, newTarget )

当使用函数对象 F 和 ECMAScript 语言值 newTarget 调用抽象操作 PrepareForOrdinaryCall 时，将执行以下步骤：

1. Assert: Type(newTarget) is Undefined or Object.
2. Let callerContext be the running execution context.
3. Let _calleeContext _be a new ECMAScript code execution context.
4. Set the Function of calleeContext _to _F.
5. Let calleeRealm _be _F.[[Realm]].
6. Set the Realm of calleeContext _to _calleeRealm.
7. Set the ScriptOrModule of calleeContext _to _F.[[ScriptOrModule]]
8. Let localEnv _be NewFunctionEnvironment(_F, newTarget).
9. Set the LexicalEnvironment of calleeContext _to _localEnv
10. Set the VariableEnvironment of calleeContext _to _localEnv.
11. If callerContext _is not already suspended, suspend _callerContext.
12. Push _calleeContext _onto the execution context stack; _calleeContext _is now the running execution context.
13. NOTE Any exception objects produced after this point are associated with calleeRealm.
14. Return calleeContext.

原文地址：https://tc39.github.io/ecma262/#sec-prepareforordinarycall