github.com/ethereum/go-ethereum@v1.16.1/core/vm/memory_table.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package vm
    18  
    19  func memoryKeccak256(stack *Stack) (uint64, bool) {
    20  	return calcMemSize64(stack.Back(0), stack.Back(1))
    21  }
    22  
    23  func memoryCallDataCopy(stack *Stack) (uint64, bool) {
    24  	return calcMemSize64(stack.Back(0), stack.Back(2))
    25  }
    26  
    27  func memoryReturnDataCopy(stack *Stack) (uint64, bool) {
    28  	return calcMemSize64(stack.Back(0), stack.Back(2))
    29  }
    30  
    31  func memoryCodeCopy(stack *Stack) (uint64, bool) {
    32  	return calcMemSize64(stack.Back(0), stack.Back(2))
    33  }
    34  
    35  func memoryExtCodeCopy(stack *Stack) (uint64, bool) {
    36  	return calcMemSize64(stack.Back(1), stack.Back(3))
    37  }
    38  
    39  func memoryMLoad(stack *Stack) (uint64, bool) {
    40  	return calcMemSize64WithUint(stack.Back(0), 32)
    41  }
    42  
    43  func memoryMStore8(stack *Stack) (uint64, bool) {
    44  	return calcMemSize64WithUint(stack.Back(0), 1)
    45  }
    46  
    47  func memoryMStore(stack *Stack) (uint64, bool) {
    48  	return calcMemSize64WithUint(stack.Back(0), 32)
    49  }
    50  
    51  func memoryMcopy(stack *Stack) (uint64, bool) {
    52  	mStart := stack.Back(0) // stack[0]: dest
    53  	if stack.Back(1).Gt(mStart) {
    54  		mStart = stack.Back(1) // stack[1]: source
    55  	}
    56  	return calcMemSize64(mStart, stack.Back(2)) // stack[2]: length
    57  }
    58  
    59  func memoryCreate(stack *Stack) (uint64, bool) {
    60  	return calcMemSize64(stack.Back(1), stack.Back(2))
    61  }
    62  
    63  func memoryCreate2(stack *Stack) (uint64, bool) {
    64  	return calcMemSize64(stack.Back(1), stack.Back(2))
    65  }
    66  
    67  func memoryCall(stack *Stack) (uint64, bool) {
    68  	x, overflow := calcMemSize64(stack.Back(5), stack.Back(6))
    69  	if overflow {
    70  		return 0, true
    71  	}
    72  	y, overflow := calcMemSize64(stack.Back(3), stack.Back(4))
    73  	if overflow {
    74  		return 0, true
    75  	}
    76  	if x > y {
    77  		return x, false
    78  	}
    79  	return y, false
    80  }
    81  
    82  func memoryDelegateCall(stack *Stack) (uint64, bool) {
    83  	x, overflow := calcMemSize64(stack.Back(4), stack.Back(5))
    84  	if overflow {
    85  		return 0, true
    86  	}
    87  	y, overflow := calcMemSize64(stack.Back(2), stack.Back(3))
    88  	if overflow {
    89  		return 0, true
    90  	}
    91  	if x > y {
    92  		return x, false
    93  	}
    94  	return y, false
    95  }
    96  
    97  func memoryStaticCall(stack *Stack) (uint64, bool) {
    98  	x, overflow := calcMemSize64(stack.Back(4), stack.Back(5))
    99  	if overflow {
   100  		return 0, true
   101  	}
   102  	y, overflow := calcMemSize64(stack.Back(2), stack.Back(3))
   103  	if overflow {
   104  		return 0, true
   105  	}
   106  	if x > y {
   107  		return x, false
   108  	}
   109  	return y, false
   110  }
   111  
   112  func memoryReturn(stack *Stack) (uint64, bool) {
   113  	return calcMemSize64(stack.Back(0), stack.Back(1))
   114  }
   115  
   116  func memoryRevert(stack *Stack) (uint64, bool) {
   117  	return calcMemSize64(stack.Back(0), stack.Back(1))
   118  }
   119  
   120  func memoryLog(stack *Stack) (uint64, bool) {
   121  	return calcMemSize64(stack.Back(0), stack.Back(1))
   122  }