// Copyright 2021 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "include/v8config.h" #include "src/trap-handler/trap-handler-simulator.h" #if V8_OS_MACOSX #define SYMBOL(name) "_" #name #else // !V8_OS_MACOSX #define SYMBOL(name) #name #endif // !V8_OS_MACOSX // Define the ProbeMemory function declared in trap-handler-simulators.h. asm( ".globl " SYMBOL(ProbeMemory) " \n" SYMBOL(ProbeMemory) ": \n" // First parameter (address) passed in %rdi. // The second parameter (pc) is unused here. It is read by the trap handler // instead. " movb (%rdi), %al \n" // Return 0 on success. " xorl %eax, %eax \n" " ret \n" ".globl " SYMBOL(v8_probe_memory_continuation) "\n" SYMBOL(v8_probe_memory_continuation) ": \n" // If the trap handler continues here, it wrote the landing pad in %rax. " ret \n");