| ;; Copyright (C) 2013 Google Inc. All rights reserved. |
| ;; |
| ;; Redistribution and use in source and binary forms, with or without |
| ;; modification, are permitted provided that the following conditions are |
| ;; met: |
| ;; |
| ;; * Redistributions of source code must retain the above copyright |
| ;; notice, this list of conditions and the following disclaimer. |
| ;; * Redistributions in binary form must reproduce the above |
| ;; copyright notice, this list of conditions and the following disclaimer |
| ;; in the documentation and/or other materials provided with the |
| ;; distribution. |
| ;; * Neither the name of Google Inc. nor the names of its |
| ;; contributors may be used to endorse or promote products derived from |
| ;; this software without specific prior written permission. |
| ;; |
| ;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ;; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| ;; |
| |
| %ifndef X64POSIX |
| %define X64POSIX 0 |
| %endif |
| |
| %ifndef X64WIN |
| %define X64WIN 0 |
| %endif |
| |
| %ifndef IA32 |
| %define IA32 0 |
| %endif |
| |
| %ifndef ARM |
| %define ARM 0 |
| %endif |
| |
| ;; Prefix symbols by '_' if PREFIX is defined. |
| %ifdef PREFIX |
| %define mangle(x) _ %+ x |
| %else |
| %define mangle(x) x |
| %endif |
| |
| |
| ; global_private makes a symbol a global but private to this shared library. |
| %ifidn __OUTPUT_FORMAT__,elf32 |
| %define global_private(x) global mangle(x) %+ :function hidden |
| %elifidn __OUTPUT_FORMAT__,elf64 |
| %define global_private(x) global mangle(x) %+ :function hidden |
| %elifidn __OUTPUT_FORMAT__,elfx32 |
| %define global_private(x) global mangle(x) %+ :function hidden |
| %elifidn __OUTPUT_FORMAT__,macho32 |
| %define global_private(x) global mangle(x) %+ :private_extern |
| %elifidn __OUTPUT_FORMAT__,macho64 |
| %define global_private(x) global mangle(x) %+ :private_extern |
| %else |
| %define global_private(x) global mangle(x) |
| %endif |
| |
| section .text |
| |
| ;; typedef void (*PushAllRegistersCallback)(ThreadState*, intptr_t*); |
| ;; extern "C" void PushAllRegisters(ThreadState*, PushAllRegistersCallback) |
| |
| global_private(PushAllRegisters) |
| |
| %if X64POSIX |
| |
| mangle(PushAllRegisters): |
| ;; Push all callee-saves registers to get them |
| ;; on the stack for conservative stack scanning. |
| ;; We maintain 16-byte alignment at calls (required on Mac). |
| ;; There is an 8-byte return address on the stack and we push |
| ;; 56 bytes which maintains 16-byte stack alignment |
| ;; at the call. |
| push 0 |
| push rbx |
| push rbp |
| push r12 |
| push r13 |
| push r14 |
| push r15 |
| ;; Pass the first argument unchanged (rdi) |
| ;; and the stack pointer after pushing callee-saved |
| ;; registers to the callback. |
| mov r8, rsi |
| mov rsi, rsp |
| call r8 |
| ;; Pop the callee-saved registers. None of them were |
| ;; modified so no restoring is needed. |
| add rsp, 56 |
| ret |
| |
| %elif X64WIN |
| |
| mangle(PushAllRegisters): |
| ;; Push all callee-saves registers to get them |
| ;; on the stack for conservative stack scanning. |
| ;; There is an 8-byte return address on the stack and we push |
| ;; 72 bytes which maintains the required 16-byte stack alignment |
| ;; at the call. |
| push 0 |
| push rsi |
| push rdi |
| push rbx |
| push rbp |
| push r12 |
| push r13 |
| push r14 |
| push r15 |
| ;; Pass the first argument unchanged (rcx) |
| ;; and the stack pointer after pushing callee-saved |
| ;; registers to the callback. |
| mov r9, rdx |
| mov rdx, rsp |
| call r9 |
| ;; Pop the callee-saved registers. None of them were |
| ;; modified so no restoring is needed. |
| add rsp, 72 |
| ret |
| |
| %elif IA32 |
| |
| mangle(PushAllRegisters): |
| ;; Push all callee-saves registers to get them |
| ;; on the stack for conservative stack scanning. |
| ;; We maintain 16-byte alignment at calls (required on |
| ;; Mac). There is a 4-byte return address on the stack |
| ;; and we push 28 bytes which maintains 16-byte alignment |
| ;; at the call. |
| push ebx |
| push ebp |
| push esi |
| push edi |
| ;; Pass the first argument unchanged and the |
| ;; stack pointer after pushing callee-save registers |
| ;; to the callback. |
| mov ecx, [esp + 24] |
| push esp |
| push dword [esp + 24] |
| call ecx |
| ;; Pop arguments and the callee-saved registers. |
| ;; None of the callee-saved registers were modified |
| ;; so we do not need to restore them. |
| add esp, 24 |
| ret |
| |
| |
| %elif ARM |
| %error "NASM does not support arm. Use SaveRegisters_arm.S on arm." |
| %else |
| %error "Unsupported platform." |
| %endif |