55e55826ee
* All jumps must land on a JUMPDEST instruction byte. * The byte may not be part of a PUSH*
22 lines
591 B
Go
22 lines
591 B
Go
package vm
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import "gopkg.in/fatih/set.v0"
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func analyseJumpDests(code []byte) (dests *set.Set) {
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dests = set.New()
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for pc := uint64(0); pc < uint64(len(code)); pc++ {
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var op OpCode = OpCode(code[pc])
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switch op {
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case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
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a := uint64(op) - uint64(PUSH1) + 1
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pc += a
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//lp = true
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case JUMPDEST:
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dests.Add(pc)
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}
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}
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return
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}
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