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cmd/disasm: fix array-out-of-bounds error.

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This commit is contained in:
Valentin Wüstholz 2017-01-07 13:33:12 +01:00
parent 17182732f5
commit d58486dce5
1 changed files with 8 additions and 4 deletions
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14
cmd/disasm/main.go
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@ -42,15 +42,19 @@ func main() {
for pc := uint64(0); pc < uint64(len(code)); pc++ {
op := vm.OpCode(code[pc])
fmt.Printf("%-5d %v", pc, op)
switch op {
case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8, vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15, vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22, vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29, vm.PUSH30, vm.PUSH31, vm.PUSH32:
a := uint64(op) - uint64(vm.PUSH1) + 1
fmt.Printf(" => %x", code[pc+1:pc+1+a])
pc += a
u := pc + 1 + a
if uint64(len(code)) <= pc || uint64(len(code)) < u {
fmt.Printf("Error: incomplete push instruction at %v\n", pc)
return
}
fmt.Printf("%-5d %v => %x\n", pc, op, code[pc+1:u])
pc += a
default:
fmt.Printf("%-5d %v\n", pc, op)
}
fmt.Println()
}
}