/******************************************************************************* * * Module Name: dmcstyle - Support for C-style operator disassembly * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any 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. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include #include #include #include #include #include #define _COMPONENT ACPI_CA_DEBUGGER ACPI_MODULE_NAME ("dmcstyle") /* Local prototypes */ static char * AcpiDmGetCompoundSymbol ( UINT16 AslOpcode); static void AcpiDmPromoteTarget ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *Target); static BOOLEAN AcpiDmIsValidTarget ( ACPI_PARSE_OBJECT *Op); static BOOLEAN AcpiDmIsTargetAnOperand ( ACPI_PARSE_OBJECT *Target, ACPI_PARSE_OBJECT *Operand, BOOLEAN TopLevel); static BOOLEAN AcpiDmIsOptimizationIgnored ( ACPI_PARSE_OBJECT *StoreOp, ACPI_PARSE_OBJECT *StoreArgument); /******************************************************************************* * * FUNCTION: AcpiDmCheckForSymbolicOpcode * * PARAMETERS: Op - Current parse object * Walk - Current parse tree walk info * * RETURN: TRUE if opcode can be converted to symbolic, FALSE otherwise * * DESCRIPTION: This is the main code that implements disassembly of AML code * to C-style operators. Called during descending phase of the * parse tree walk. * ******************************************************************************/ BOOLEAN AcpiDmCheckForSymbolicOpcode ( ACPI_PARSE_OBJECT *Op, ACPI_OP_WALK_INFO *Info) { char *OperatorSymbol = NULL; ACPI_PARSE_OBJECT *Argument1; ACPI_PARSE_OBJECT *Argument2; ACPI_PARSE_OBJECT *Target; ACPI_PARSE_OBJECT *Target2; /* Exit immediately if ASL+ not enabled */ if (!AcpiGbl_CstyleDisassembly) { return (FALSE); } /* Get the first operand */ Argument1 = AcpiPsGetArg (Op, 0); if (!Argument1) { return (FALSE); } /* Get the second operand */ Argument2 = Argument1->Common.Next; /* Setup the operator string for this opcode */ switch (Op->Common.AmlOpcode) { case AML_ADD_OP: OperatorSymbol = " + "; break; case AML_SUBTRACT_OP: OperatorSymbol = " - "; break; case AML_MULTIPLY_OP: OperatorSymbol = " * "; break; case AML_DIVIDE_OP: OperatorSymbol = " / "; break; case AML_MOD_OP: OperatorSymbol = " % "; break; case AML_SHIFT_LEFT_OP: OperatorSymbol = " << "; break; case AML_SHIFT_RIGHT_OP: OperatorSymbol = " >> "; break; case AML_BIT_AND_OP: OperatorSymbol = " & "; break; case AML_BIT_OR_OP: OperatorSymbol = " | "; break; case AML_BIT_XOR_OP: OperatorSymbol = " ^ "; break; /* Logical operators, no target */ case AML_LOGICAL_AND_OP: OperatorSymbol = " && "; break; case AML_LOGICAL_EQUAL_OP: OperatorSymbol = " == "; break; case AML_LOGICAL_GREATER_OP: OperatorSymbol = " > "; break; case AML_LOGICAL_LESS_OP: OperatorSymbol = " < "; break; case AML_LOGICAL_OR_OP: OperatorSymbol = " || "; break; case AML_LOGICAL_NOT_OP: /* * Check for the LNOT sub-opcodes. These correspond to * LNotEqual, LLessEqual, and LGreaterEqual. There are * no actual AML opcodes for these operators. */ switch (Argument1->Common.AmlOpcode) { case AML_LOGICAL_EQUAL_OP: OperatorSymbol = " != "; break; case AML_LOGICAL_GREATER_OP: OperatorSymbol = " <= "; break; case AML_LOGICAL_LESS_OP: OperatorSymbol = " >= "; break; default: /* Unary LNOT case, emit "!" immediately */ AcpiOsPrintf ("!"); return (TRUE); } Argument1->Common.DisasmOpcode = ACPI_DASM_LNOT_SUFFIX; Op->Common.DisasmOpcode = ACPI_DASM_LNOT_PREFIX; /* Save symbol string in the next child (not peer) */ Argument2 = AcpiPsGetArg (Argument1, 0); if (!Argument2) { return (FALSE); } Argument2->Common.OperatorSymbol = OperatorSymbol; return (TRUE); case AML_INDEX_OP: /* * Check for constant source operand. Note: although technically * legal syntax, the iASL compiler does not support this with * the symbolic operators for Index(). It doesn't make sense to * use Index() with a constant anyway. */ if ((Argument1->Common.AmlOpcode == AML_STRING_OP) || (Argument1->Common.AmlOpcode == AML_BUFFER_OP) || (Argument1->Common.AmlOpcode == AML_PACKAGE_OP) || (Argument1->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP)) { Op->Common.DisasmFlags |= ACPI_PARSEOP_CLOSING_PAREN; return (FALSE); } /* Index operator is [] */ Argument1->Common.OperatorSymbol = " ["; Argument2->Common.OperatorSymbol = "]"; break; /* Unary operators */ case AML_DECREMENT_OP: OperatorSymbol = "--"; break; case AML_INCREMENT_OP: OperatorSymbol = "++"; break; case AML_BIT_NOT_OP: case AML_STORE_OP: OperatorSymbol = NULL; break; default: return (FALSE); } if (Argument1->Common.DisasmOpcode == ACPI_DASM_LNOT_SUFFIX) { return (TRUE); } /* * This is the key to how the disassembly of the C-style operators * works. We save the operator symbol in the first child, thus * deferring symbol output until after the first operand has been * emitted. */ if (!Argument1->Common.OperatorSymbol) { Argument1->Common.OperatorSymbol = OperatorSymbol; } /* * Check for a valid target as the 3rd (or sometimes 2nd) operand * * Compound assignment operator support: * Attempt to optimize constructs of the form: * Add (Local1, 0xFF, Local1) * to: * Local1 += 0xFF * * Only the math operators and Store() have a target. * Logicals have no target. */ switch (Op->Common.AmlOpcode) { case AML_ADD_OP: case AML_SUBTRACT_OP: case AML_MULTIPLY_OP: case AML_DIVIDE_OP: case AML_MOD_OP: case AML_SHIFT_LEFT_OP: case AML_SHIFT_RIGHT_OP: case AML_BIT_AND_OP: case AML_BIT_OR_OP: case AML_BIT_XOR_OP: /* Target is 3rd operand */ Target = Argument2->Common.Next; if (Op->Common.AmlOpcode == AML_DIVIDE_OP) { Target2 = Target->Common.Next; /* * Divide has an extra target operand (Remainder). * Default behavior is to simply ignore ASL+ conversion * if the remainder target (modulo) is specified. */ if (!AcpiGbl_DoDisassemblerOptimizations) { if (AcpiDmIsValidTarget (Target)) { Argument1->Common.OperatorSymbol = NULL; Op->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY; return (FALSE); } Target->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE; Target = Target2; } else { /* * Divide has an extra target operand (Remainder). * If both targets are specified, it cannot be converted * to a C-style operator. */ if (AcpiDmIsValidTarget (Target) && AcpiDmIsValidTarget (Target2)) { Argument1->Common.OperatorSymbol = NULL; Op->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY; return (FALSE); } if (AcpiDmIsValidTarget (Target)) /* Only first Target is valid (remainder) */ { /* Convert the Divide to Modulo */ Op->Common.AmlOpcode = AML_MOD_OP; Argument1->Common.OperatorSymbol = " % "; Target2->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE; } else /* Only second Target (quotient) is valid */ { Target->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE; Target = Target2; } } } /* Parser should ensure there is at least a placeholder target */ if (!Target) { return (FALSE); } if (!AcpiDmIsValidTarget (Target)) { /* Not a valid target (placeholder only, from parser) */ break; } /* * Promote the target up to the first child in the parse * tree. This is done because the target will be output * first, in the form: * = Operands... */ AcpiDmPromoteTarget (Op, Target); /* Check operands for conversion to a "Compound Assignment" */ switch (Op->Common.AmlOpcode) { /* Commutative operators */ case AML_ADD_OP: case AML_MULTIPLY_OP: case AML_BIT_AND_OP: case AML_BIT_OR_OP: case AML_BIT_XOR_OP: /* * For the commutative operators, we can convert to a * compound statement only if at least one (either) operand * is the same as the target. * * Add (A, B, A) --> A += B * Add (B, A, A) --> A += B * Add (B, C, A) --> A = (B + C) */ if ((AcpiDmIsTargetAnOperand (Target, Argument1, TRUE)) || (AcpiDmIsTargetAnOperand (Target, Argument2, TRUE))) { Target->Common.OperatorSymbol = AcpiDmGetCompoundSymbol (Op->Common.AmlOpcode); /* Convert operator to compound assignment */ Op->Common.DisasmFlags |= ACPI_PARSEOP_COMPOUND_ASSIGNMENT; Argument1->Common.OperatorSymbol = NULL; return (TRUE); } break; /* Non-commutative operators */ case AML_SUBTRACT_OP: case AML_DIVIDE_OP: case AML_MOD_OP: case AML_SHIFT_LEFT_OP: case AML_SHIFT_RIGHT_OP: /* * For the non-commutative operators, we can convert to a * compound statement only if the target is the same as the * first operand. * * Subtract (A, B, A) --> A -= B * Subtract (B, A, A) --> A = (B - A) */ if ((AcpiDmIsTargetAnOperand (Target, Argument1, TRUE))) { Target->Common.OperatorSymbol = AcpiDmGetCompoundSymbol (Op->Common.AmlOpcode); /* Convert operator to compound assignment */ Op->Common.DisasmFlags |= ACPI_PARSEOP_COMPOUND_ASSIGNMENT; Argument1->Common.OperatorSymbol = NULL; return (TRUE); } break; default: break; } /* * If we are within a C-style expression, emit an extra open * paren. Implemented by examining the parent op. */ switch (Op->Common.Parent->Common.AmlOpcode) { case AML_ADD_OP: case AML_SUBTRACT_OP: case AML_MULTIPLY_OP: case AML_DIVIDE_OP: case AML_MOD_OP: case AML_SHIFT_LEFT_OP: case AML_SHIFT_RIGHT_OP: case AML_BIT_AND_OP: case AML_BIT_OR_OP: case AML_BIT_XOR_OP: case AML_LOGICAL_AND_OP: case AML_LOGICAL_EQUAL_OP: case AML_LOGICAL_GREATER_OP: case AML_LOGICAL_LESS_OP: case AML_LOGICAL_OR_OP: Op->Common.DisasmFlags |= ACPI_PARSEOP_ASSIGNMENT; AcpiOsPrintf ("("); break; default: break; } /* Normal output for ASL/AML operators with a target operand */ Target->Common.OperatorSymbol = " = ("; return (TRUE); /* Binary operators, no parens */ case AML_DECREMENT_OP: case AML_INCREMENT_OP: return (TRUE); case AML_INDEX_OP: /* Target is optional, 3rd operand */ Target = Argument2->Common.Next; if (AcpiDmIsValidTarget (Target)) { AcpiDmPromoteTarget (Op, Target); if (!Target->Common.OperatorSymbol) { Target->Common.OperatorSymbol = " = "; } } return (TRUE); case AML_STORE_OP: /* * For Store, the Target is the 2nd operand. We know the target * is valid, because it is not optional. * * Ignore any optimizations/folding if flag is set. * Used for iASL/disassembler test suite only. */ if (AcpiDmIsOptimizationIgnored (Op, Argument1)) { return (FALSE); } /* * Perform conversion. * In the parse tree, simply swap the target with the * source so that the target is processed first. */ Target = Argument1->Common.Next; if (!Target) { return (FALSE); } AcpiDmPromoteTarget (Op, Target); if (!Target->Common.OperatorSymbol) { Target->Common.OperatorSymbol = " = "; } return (TRUE); case AML_BIT_NOT_OP: /* Target is optional, 2nd operand */ Target = Argument1->Common.Next; if (!Target) { return (FALSE); } if (AcpiDmIsValidTarget (Target)) { /* Valid target, not a placeholder */ AcpiDmPromoteTarget (Op, Target); Target->Common.OperatorSymbol = " = ~"; } else { /* No target. Emit this prefix operator immediately */ AcpiOsPrintf ("~"); } return (TRUE); default: break; } /* All other operators, emit an open paren */ AcpiOsPrintf ("("); return (TRUE); } /******************************************************************************* * * FUNCTION: AcpiDmIsOptimizationIgnored * * PARAMETERS: StoreOp - Store operator parse object * StoreArgument - Target associate with the Op * * RETURN: TRUE if this Store operator should not be converted/removed. * * DESCRIPTION: The following function implements "Do not optimize if a * store is immediately followed by a math/bit operator that * has no target". * * Function is ignored if DoDisassemblerOptimizations is TRUE. * This is the default, ignore this function. * * Disables these types of optimizations, and simply emits * legacy ASL code: * Store (Add (INT1, 4), INT2) --> Add (INT1, 4, INT2) * --> INT2 = INT1 + 4 * * Store (Not (INT1), INT2) --> Not (INT1, INT2) * --> INT2 = ~INT1 * * Used only for the ASL test suite. For the test suite, we * don't want to perform some optimizations to ensure binary * compatibility with the generation of the legacy ASL->AML. * In other words, for all test modules we want exactly: * (ASL+ -> AML) == (ASL- -> AML) * ******************************************************************************/ static BOOLEAN AcpiDmIsOptimizationIgnored ( ACPI_PARSE_OBJECT *StoreOp, ACPI_PARSE_OBJECT *StoreArgument) { ACPI_PARSE_OBJECT *Argument1; ACPI_PARSE_OBJECT *Argument2; ACPI_PARSE_OBJECT *Target; /* No optimizations/folding for the typical case */ if (AcpiGbl_DoDisassemblerOptimizations) { return (FALSE); } /* * Only a small subset of ASL/AML operators can be optimized. * Can only optimize/fold if there is no target (or targets) * specified for the operator. And of course, the operator * is surrounded by a Store() operator. */ switch (StoreArgument->Common.AmlOpcode) { case AML_ADD_OP: case AML_SUBTRACT_OP: case AML_MULTIPLY_OP: case AML_MOD_OP: case AML_SHIFT_LEFT_OP: case AML_SHIFT_RIGHT_OP: case AML_BIT_AND_OP: case AML_BIT_OR_OP: case AML_BIT_XOR_OP: case AML_INDEX_OP: /* These operators have two arguments and one target */ Argument1 = StoreArgument->Common.Value.Arg; Argument2 = Argument1->Common.Next; Target = Argument2->Common.Next; if (!AcpiDmIsValidTarget (Target)) { StoreOp->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY; return (TRUE); } break; case AML_DIVIDE_OP: /* This operator has two arguments and two targets */ Argument1 = StoreArgument->Common.Value.Arg; Argument2 = Argument1->Common.Next; Target = Argument2->Common.Next; if (!AcpiDmIsValidTarget (Target) || !AcpiDmIsValidTarget (Target->Common.Next)) { StoreOp->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY; return (TRUE); } break; case AML_BIT_NOT_OP: /* This operator has one operand and one target */ Argument1 = StoreArgument->Common.Value.Arg; Target = Argument1->Common.Next; if (!AcpiDmIsValidTarget (Target)) { StoreOp->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY; return (TRUE); } break; default: break; } return (FALSE); } /******************************************************************************* * * FUNCTION: AcpiDmCloseOperator * * PARAMETERS: Op - Current parse object * * RETURN: None * * DESCRIPTION: Closes an operator by adding a closing parentheses if and * when necessary. Called during ascending phase of the * parse tree walk. * ******************************************************************************/ void AcpiDmCloseOperator ( ACPI_PARSE_OBJECT *Op) { /* Always emit paren if ASL+ disassembly disabled */ if (!AcpiGbl_CstyleDisassembly) { AcpiOsPrintf (")"); ASL_CV_PRINT_ONE_COMMENT (Op, AML_COMMENT_END_NODE, NULL, 0); return; } if (Op->Common.DisasmFlags & ACPI_PARSEOP_LEGACY_ASL_ONLY) { AcpiOsPrintf (")"); ASL_CV_PRINT_ONE_COMMENT (Op, AML_COMMENT_END_NODE, NULL, 0); return; } /* Check if we need to add an additional closing paren */ switch (Op->Common.AmlOpcode) { case AML_ADD_OP: case AML_SUBTRACT_OP: case AML_MULTIPLY_OP: case AML_DIVIDE_OP: case AML_MOD_OP: case AML_SHIFT_LEFT_OP: case AML_SHIFT_RIGHT_OP: case AML_BIT_AND_OP: case AML_BIT_OR_OP: case AML_BIT_XOR_OP: case AML_LOGICAL_AND_OP: case AML_LOGICAL_EQUAL_OP: case AML_LOGICAL_GREATER_OP: case AML_LOGICAL_LESS_OP: case AML_LOGICAL_OR_OP: /* Emit paren only if this is not a compound assignment */ if (Op->Common.DisasmFlags & ACPI_PARSEOP_COMPOUND_ASSIGNMENT) { ASL_CV_PRINT_ONE_COMMENT (Op, AML_COMMENT_END_NODE, NULL, 0); return; } /* Emit extra close paren for assignment within an expression */ if (Op->Common.DisasmFlags & ACPI_PARSEOP_ASSIGNMENT) { AcpiOsPrintf (")"); } break; case AML_INDEX_OP: /* This is case for unsupported Index() source constants */ if (Op->Common.DisasmFlags & ACPI_PARSEOP_CLOSING_PAREN) { AcpiOsPrintf (")"); } ASL_CV_PRINT_ONE_COMMENT (Op, AML_COMMENT_END_NODE, NULL, 0); return; /* No need for parens for these */ case AML_DECREMENT_OP: case AML_INCREMENT_OP: case AML_LOGICAL_NOT_OP: case AML_BIT_NOT_OP: case AML_STORE_OP: ASL_CV_PRINT_ONE_COMMENT (Op, AML_COMMENT_END_NODE, NULL, 0); return; default: /* Always emit paren for non-ASL+ operators */ break; } AcpiOsPrintf (")"); ASL_CV_PRINT_ONE_COMMENT (Op, AML_COMMENT_END_NODE, NULL, 0); return; } /******************************************************************************* * * FUNCTION: AcpiDmGetCompoundSymbol * * PARAMETERS: AslOpcode * * RETURN: String containing the compound assignment symbol * * DESCRIPTION: Detect opcodes that can be converted to compound assignment, * return the appropriate operator string. * ******************************************************************************/ static char * AcpiDmGetCompoundSymbol ( UINT16 AmlOpcode) { char *Symbol; switch (AmlOpcode) { case AML_ADD_OP: Symbol = " += "; break; case AML_SUBTRACT_OP: Symbol = " -= "; break; case AML_MULTIPLY_OP: Symbol = " *= "; break; case AML_DIVIDE_OP: Symbol = " /= "; break; case AML_MOD_OP: Symbol = " %= "; break; case AML_SHIFT_LEFT_OP: Symbol = " <<= "; break; case AML_SHIFT_RIGHT_OP: Symbol = " >>= "; break; case AML_BIT_AND_OP: Symbol = " &= "; break; case AML_BIT_OR_OP: Symbol = " |= "; break; case AML_BIT_XOR_OP: Symbol = " ^= "; break; default: /* No operator string for all other opcodes */ return (NULL); } return (Symbol); } /******************************************************************************* * * FUNCTION: AcpiDmPromoteTarget * * PARAMETERS: Op - Operator parse object * Target - Target associate with the Op * * RETURN: None * * DESCRIPTION: Transform the parse tree by moving the target up to the first * child of the Op. * ******************************************************************************/ static void AcpiDmPromoteTarget ( ACPI_PARSE_OBJECT *Op, ACPI_PARSE_OBJECT *Target) { ACPI_PARSE_OBJECT *Child; /* Link target directly to the Op as first child */ Child = Op->Common.Value.Arg; Op->Common.Value.Arg = Target; Target->Common.Next = Child; /* Find the last peer, it is linked to the target. Unlink it. */ while (Child->Common.Next != Target) { Child = Child->Common.Next; } Child->Common.Next = NULL; } /******************************************************************************* * * FUNCTION: AcpiDmIsValidTarget * * PARAMETERS: Target - Target Op from the parse tree * * RETURN: TRUE if the Target is real. FALSE if it is just a placeholder * Op that was inserted by the parser. * * DESCRIPTION: Determine if a Target Op is a placeholder Op or a real Target. * In other words, determine if the optional target is used or * not. Note: If Target is NULL, something is seriously wrong, * probably with the parse tree. * ******************************************************************************/ static BOOLEAN AcpiDmIsValidTarget ( ACPI_PARSE_OBJECT *Target) { if (!Target) { return (FALSE); } if ((Target->Common.AmlOpcode == AML_INT_NAMEPATH_OP) && (Target->Common.Value.Arg == NULL)) { return (FALSE); } return (TRUE); } /******************************************************************************* * * FUNCTION: AcpiDmIsTargetAnOperand * * PARAMETERS: Target - Target associated with the expression * Operand - An operand associated with expression * * RETURN: TRUE if expression can be converted to a compound assignment. * FALSE otherwise. * * DESCRIPTION: Determine if the Target duplicates the operand, in order to * detect if the expression can be converted to a compound * assignment. (+=, *=, etc.) * ******************************************************************************/ static BOOLEAN AcpiDmIsTargetAnOperand ( ACPI_PARSE_OBJECT *Target, ACPI_PARSE_OBJECT *Operand, BOOLEAN TopLevel) { const ACPI_OPCODE_INFO *OpInfo; BOOLEAN Same; /* * Opcodes must match. Note: ignoring the difference between nameseg * and namepath for now. May be needed later. */ if (Target->Common.AmlOpcode != Operand->Common.AmlOpcode) { return (FALSE); } /* Nodes should match, even if they are NULL */ if (Target->Common.Node != Operand->Common.Node) { return (FALSE); } /* Determine if a child exists */ OpInfo = AcpiPsGetOpcodeInfo (Operand->Common.AmlOpcode); if (OpInfo->Flags & AML_HAS_ARGS) { Same = AcpiDmIsTargetAnOperand (Target->Common.Value.Arg, Operand->Common.Value.Arg, FALSE); if (!Same) { return (FALSE); } } /* Check the next peer, as long as we are not at the top level */ if ((!TopLevel) && Target->Common.Next) { Same = AcpiDmIsTargetAnOperand (Target->Common.Next, Operand->Common.Next, FALSE); if (!Same) { return (FALSE); } } /* Suppress the duplicate operand at the top-level */ if (TopLevel) { Operand->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE; } return (TRUE); }