40 lines
904 B
Go
40 lines
904 B
Go
package asm
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// Comment adds a comment at the current position.
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func (a *Assembler) Comment(text string) {
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a.Instructions = append(a.Instructions, Instruction{
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Mnemonic: COMMENT,
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Data: &Label{
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Name: text,
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},
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})
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}
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// Call calls a function whose position is identified by a label.
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func (a *Assembler) Call(name string) {
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a.Instructions = append(a.Instructions, Instruction{
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Mnemonic: CALL,
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Data: &Label{
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Name: name,
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},
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})
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}
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// Return returns back to the caller.
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func (a *Assembler) Return() {
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if len(a.Instructions) > 0 {
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lastMnemonic := a.Instructions[len(a.Instructions)-1].Mnemonic
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if lastMnemonic == RETURN || lastMnemonic == JUMP {
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return
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}
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}
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a.Instructions = append(a.Instructions, Instruction{Mnemonic: RETURN})
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}
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// Syscall executes a kernel function.
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func (a *Assembler) Syscall() {
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a.Instructions = append(a.Instructions, Instruction{Mnemonic: SYSCALL})
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}
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