diff options
Diffstat (limited to 'deps/v8/src/heap/base/asm/x64/save_registers_asm.cc')
| -rw-r--r-- | deps/v8/src/heap/base/asm/x64/save_registers_asm.cc | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/deps/v8/src/heap/base/asm/x64/save_registers_asm.cc b/deps/v8/src/heap/base/asm/x64/save_registers_asm.cc deleted file mode 100644 index 5ff39fccd3..0000000000 --- a/deps/v8/src/heap/base/asm/x64/save_registers_asm.cc +++ /dev/null @@ -1,94 +0,0 @@ -// Copyright 2020 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 <src/heap/base/stack.h> - -// Save all callee-saved registers in the specified buffer. -// extern "C" void SaveCalleeSavedRegisters(intptr_t* buffer); -// -// We cannot rely on clang generating the function and right symbol mangling -// as `__attribute__((naked))` does not prevent clang from generating TSAN -// function entry stubs (`__tsan_func_entry`). Even with -// `__attribute__((no_sanitize_thread)` annotation clang generates the entry -// stub. -// See https://bugs.llvm.org/show_bug.cgi?id=45400. -// -// Do not depend on V8_TARGET_OS_* defines as some embedders may override the -// GN toolchain (e.g. ChromeOS) and not provide them. -// _WIN64 Defined as 1 when the compilation target is 64-bit ARM or x64. -// Otherwise, undefined. - -#ifdef _WIN64 -// Source: https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention - -// 7 64-bit registers + 1 for alignment purposes = 8 * 1 = 8 intprt_t -// 10 128-bit registers = 10 * 2 = 20 intptr_t -static_assert(heap::base::Stack::NumberOfCalleeSavedRegisters == 28, - "Mismatch in the number of callee-saved registers"); -static_assert(sizeof(intptr_t) == 8, "Mismatch in word size"); - -asm(".globl SaveCalleeSavedRegisters \n" - "SaveCalleeSavedRegisters: \n" - // %rcx: [ intptr_t* buffer ] - // %rbp is callee-saved. Maintain proper frame pointer for debugging. - " push %rbp \n" - " mov %rsp, %rbp \n" - // Save the callee-saved registers. - " mov %rsi, 0(%rcx) \n" - " mov %rdi, 8(%rcx) \n" - " mov %rbx, 16(%rcx) \n" - " mov %r12, 24(%rcx) \n" - " mov %r13, 32(%rcx) \n" - " mov %r14, 40(%rcx) \n" - " mov %r15, 48(%rcx) \n" - // Skip one slot to achieve proper alignment and use aligned instructions, - // as we are sure that the buffer is properly aligned. - " movdqa %xmm6, 64(%rcx) \n" - " movdqa %xmm7, 80(%rcx) \n" - " movdqa %xmm8, 96(%rcx) \n" - " movdqa %xmm9, 112(%rcx) \n" - " movdqa %xmm10, 128(%rcx) \n" - " movdqa %xmm11, 144(%rcx) \n" - " movdqa %xmm12, 160(%rcx) \n" - " movdqa %xmm13, 176(%rcx) \n" - " movdqa %xmm14, 192(%rcx) \n" - " movdqa %xmm15, 208(%rcx) \n" - // Return. - " pop %rbp \n" - " ret \n"); - -#else // !_WIN64 -// Source: https://github.com/hjl-tools/x86-psABI/wiki/x86-64-psABI-1.0.pdf - -// 5 64-bit registers = 5 intprt_t -static_assert(heap::base::Stack::NumberOfCalleeSavedRegisters == 5, - "Mismatch in the number of callee-saved registers"); -static_assert(sizeof(intptr_t) == 8, "Mismatch in word size"); - -asm( -#ifdef __APPLE__ - ".globl _SaveCalleeSavedRegisters \n" - ".private_extern _SaveCalleeSavedRegisters \n" - "_SaveCalleeSavedRegisters: \n" -#else // !__APPLE__ - ".globl SaveCalleeSavedRegisters \n" - ".type SaveCalleeSavedRegisters, %function \n" - ".hidden SaveCalleeSavedRegisters \n" - "SaveCalleeSavedRegisters: \n" -#endif // !__APPLE__ - // %rdi: [ intptr_t* buffer ] - // %rbp is callee-saved. Maintain proper frame pointer for debugging. - " push %rbp \n" - " mov %rsp, %rbp \n" - // Save the callee-saved registers. - " mov %rbx, 0(%rdi) \n" - " mov %r12, 8(%rdi) \n" - " mov %r13, 16(%rdi) \n" - " mov %r14, 24(%rdi) \n" - " mov %r15, 32(%rdi) \n" - // Restore %rbp as it was used as frame pointer and return. - " pop %rbp \n" - " ret \n"); - -#endif // !_WIN64 |