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Constants 指令
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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type AConstNull ¶
type AConstNull struct {
base.NoOperandsInstruction
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf aconst_null Page.370
格式: aconst_null 字节: 0x1 操作: 将 null 对象引用推到操作数栈 描述: JVM 并不限定 null 的具体值
func (*AConstNull) Execute ¶
func (this *AConstNull) Execute(frame *rtda.Frame)
type BIPush ¶
type BIPush struct {
// contains filtered or unexported fields
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf bipush Page.396
格式: bipush [byte] 字节: 0x10 0x1 //
指令样例 8进制表示 指令含义 bipush 1 0x10 0x01 将 1 转成整数推到操作数栈 (0x01 -> 0x00000001) bipush -1 0x10 0xFF 将 -1 转成整数推到操作数栈 (0xFF -> 0xFFFFFFFF)
操作: 将指令后面的一字节的立即数【符号拓展(带符号)】为 int 型，推到操作数栈 描述:
func (*BIPush) FetchOperands ¶
func (this *BIPush) FetchOperands(reader *base.ByteCodeReader)
type DConst0 ¶
type DConst0 struct {
base.NoOperandsInstruction
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf dconst_<i> Page.396
格式: dconst_<i> 字节:
助记符 8进制表示 对应双进度浮点数 dconst_0 0xe 0.0 dconst_1 0xf 1.0
操作: 将double型(0.0 or 1.0)推到操作数栈 描述:
type DConst1 ¶
type DConst1 struct {
base.NoOperandsInstruction
}
type FConst0 ¶
type FConst0 struct {
base.NoOperandsInstruction
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf fconst_<i> Page.426
格式: fconst_<i> 字节:
助记符 8进制表示 对应浮点数 fconst_0 0xb 0.0 fconst_1 0xc 1.0 fconst_2 0xd 2.0
操作: 将float型(0.0, or 1.0, or 2.0)推到操作数栈 描述:
type FConst1 ¶
type FConst1 struct {
base.NoOperandsInstruction
}
type FConst2 ¶
type FConst2 struct {
base.NoOperandsInstruction
}
type IConst0 ¶
type IConst0 struct {
base.NoOperandsInstruction
}
type IConst1 ¶
type IConst1 struct {
base.NoOperandsInstruction
}
type IConst2 ¶
type IConst2 struct {
base.NoOperandsInstruction
}
type IConst3 ¶
type IConst3 struct {
base.NoOperandsInstruction
}
type IConst4 ¶
type IConst4 struct {
base.NoOperandsInstruction
}
type IConst5 ¶
type IConst5 struct {
base.NoOperandsInstruction
}
type IConstM1 ¶
type IConstM1 struct {
base.NoOperandsInstruction
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf iconst_<i> Page.456
格式: iconst_<i> 字节:
助记符 8进制表示 对应整数 iconst_m1 0x2 -1 iconst_0 0x3 0 iconst_1 0x4 1 iconst_2 0x5 2 iconst_3 0x6 3 iconst_4 0x7 4 iconst_5 0x8 5
操作: 将整型i推到操作数栈 描述: 该指令族和 bipush [byte num] 指令的效果相同，只不过该指令族在指令中隐含了推到操作数栈的整数
type LConst0 ¶
type LConst0 struct {
base.NoOperandsInstruction
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf lconst_<i> Page.514
格式: lconst_<i> 字节:
助记符 8进制表示 对应整数 lconst_0 0x9 0 lconst_1 0xa 1
操作: 将long型i推到操作数栈 描述:
type LConst1 ¶
type LConst1 struct {
base.NoOperandsInstruction
}
type LDC ¶
type LDC struct {
base.Index8Instruction
}
type LDC2W ¶
type LDC2W struct {
base.Index16Instruction
}
type LDCW ¶
type LDCW struct {
base.Index16Instruction
}
type NOP ¶
type NOP struct {
base.NoOperandsInstruction
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf nop Page.547
格式: nop 字节: 0x0 操作: do nothing
type SIPush ¶
type SIPush struct {
// contains filtered or unexported fields
}
指令定义来源 The Java® Virtual Machine Specification https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf sipush Page.558
格式: sipush [byte1] [byte2] 字节: 0x11 0x00 0x01 //
指令样例 8进制表示 指令含义 sipush 1 0x11 0x00 0x01 将 1 转成整数推到操作数栈 (0x0001 -> 0x00000001) sipush -1 0x11 0xFF 0xFF 将 -1 转成整数推到操作数栈 (0xFFFF -> 0xFFFFFFFF)
操作: 将指令后面的两字节的立即数【符号拓展(带符号)】为 int 型，推到操作数栈 描述:
func (*SIPush) FetchOperands ¶
func (this *SIPush) FetchOperands(reader *base.ByteCodeReader)
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