| /* ********************************************************** |
| * Copyright (c) 2014-2020 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 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. |
| */ |
| |
| /* |
| * cross-platform assembly and trampoline code |
| */ |
| |
| #include "../arch/asm_defines.asm" |
| START_FILE |
| |
| DECL_EXTERN(d_r_internal_error) |
| |
| /* For debugging: report an error if the function called by call_switch_stack() |
| * unexpectedly returns. Also used elsewhere. |
| * i#4304: When calling this function do not use short branch instructions, |
| * e.g., conditional branch instructions on aarch64. They don't have enough |
| * bits of offset to reach this. Instead, use unconditional branch or |
| * call instructions (e.g., b, bl on aarch64) that have a sufficient number |
| * of bits. On x86, and other architectures where a call instruction requires |
| * the stack, only use branch instructions: This can get called when there |
| * is insufficient stack. |
| */ |
| DECLARE_FUNC(unexpected_return) |
| GLOBAL_LABEL(unexpected_return:) |
| CALLC3(GLOBAL_REF(d_r_internal_error), HEX(0), HEX(0), HEX(0)) |
| /* d_r_internal_error normally never returns */ |
| /* Infinite loop is intentional. Can we do better in release build? |
| * XXX: why not a debug instr? |
| */ |
| JUMP GLOBAL_REF(unexpected_return) |
| END_FUNC(unexpected_return) |
| |
| END_FILE |