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Diffstat (limited to 'chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_x86.asm')
| -rw-r--r-- | chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_x86.asm | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_x86.asm b/chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_x86.asm new file mode 100644 index 00000000000..32bc73a6e02 --- /dev/null +++ b/chromium/third_party/WebKit/Source/platform/heap/asm/SaveRegisters_x86.asm @@ -0,0 +1,155 @@ +;; 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 + + +; PRIVATE makes a symbol private. +%ifidn __OUTPUT_FORMAT__,elf32 + %define PRIVATE :hidden +%elifidn __OUTPUT_FORMAT__,elf64 + %define PRIVATE :hidden +%elifidn __OUTPUT_FORMAT__,elfx32 + %define PRIVATE :hidden +%elif X64WIN + %define PRIVATE +%else + %define PRIVATE :private_extern +%endif + +;; typedef void (*PushAllRegistersCallback)(SafePointBarrier*, ThreadState*, intptr_t*); +;; extern "C" void pushAllRegisters(SafePointBarrier*, ThreadState*, PushAllRegistersCallback) + + global mangle(pushAllRegisters) PRIVATE + +%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 two first arguments unchanged (rdi, rsi) + ;; and the stack pointer after pushing callee-saved + ;; registers to the callback. + mov r8, rdx + mov rdx, 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. + push rsi + push rdi + push rbx + push rbp + push r12 + push r13 + push r14 + push r15 + ;; Pass the two first arguments unchanged (rcx, rdx) + ;; and the stack pointer after pushing callee-saved + ;; registers to the callback. + mov r9, r8 + mov r8, rsp + call r9 + ;; Pop the callee-saved registers. None of them were + ;; modified so no restoring is needed. + add rsp, 64 + 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 two first arguments unchanged and the + ;; stack pointer after pushing callee-save registers + ;; to the callback. + mov ecx, [esp + 28] + push esp + push dword [esp + 28] + push dword [esp + 28] + 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, 28 + ret + + +%elif ARM +%error "Yasm does not support arm. Use SaveRegisters_arm.S on arm." +%else +%error "Unsupported platform." +%endif |