| /* ********************************************************** |
| * Copyright (c) 2013 Google, Inc. All rights reserved. |
| * Copyright (c) 2007-2010 VMware, 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 VMware, 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 VMWARE, INC. 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 ASM_CODE_ONLY /* C code */ |
| #include "tools.h" /* for print() */ |
| #include <stdio.h> |
| |
| /* in asm */ |
| void test_jecxz(int *x); |
| |
| int main() |
| { |
| int x = 0; |
| test_jecxz(&x); |
| print("x=0x%08x\n", x); |
| print("thank you for testing the client interface\n"); |
| } |
| |
| #else /* asm code *************************************************************/ |
| #include "asm_defines.asm" |
| START_FILE |
| |
| #define FUNCNAME test_jecxz |
| DECLARE_FUNC_SEH(FUNCNAME) |
| GLOBAL_LABEL(FUNCNAME:) |
| mov REG_XAX, ARG1 |
| /* push callee-saved registers */ |
| PUSH_SEH(REG_XBX) |
| PUSH_SEH(REG_XBP) |
| PUSH_SEH(REG_XSI) |
| PUSH_SEH(REG_XDI) |
| END_PROLOG |
| |
| /* test jecxz */ |
| mov REG_XCX, 0 |
| jecxz jecxz_taken |
| nop |
| jecxz_taken: |
| mov REG_XCX, 1 |
| jecxz jecxz_not_taken |
| nop |
| jecxz_not_taken: |
| #ifdef X64 |
| mov ecx, 0 |
| jecxz jcxz_taken |
| #else |
| mov cx, 0 |
| jcxz jcxz_taken |
| #endif |
| nop |
| jcxz_taken: |
| |
| /* test loop */ |
| mov REG_XCX, REG_XAX |
| inc REG_XCX |
| loop loop_taken |
| nop |
| loop_taken: |
| /* test xcx being preserved */ |
| mov DWORD [REG_XCX], HEX(abcd1234) |
| |
| add REG_XSP, 0 /* make a legal SEH64 epilog */ |
| pop REG_XDI |
| pop REG_XSI |
| pop REG_XBP |
| pop REG_XBX |
| ret |
| END_FUNC(FUNCNAME) |
| |
| |
| END_FILE |
| #endif |
