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misc: small fix or general refactoring i did not bother commenting

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evilsocket 2018-10-12 17:51:38 +02:00
commit 5be3fcbf20
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8 changed files with 421 additions and 117 deletions
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35
vendor/golang.org/x/net/bpf/vm_instructions.go generated vendored
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@ -55,34 +55,41 @@ func aluOpCommon(op ALUOp, regA uint32, value uint32) uint32 {
}
}
func jumpIf(ins JumpIf, value uint32) int {
var ok bool
inV := uint32(ins.Val)
func jumpIf(ins JumpIf, regA uint32) int {
return jumpIfCommon(ins.Cond, ins.SkipTrue, ins.SkipFalse, regA, ins.Val)
}
switch ins.Cond {
func jumpIfX(ins JumpIfX, regA uint32, regX uint32) int {
return jumpIfCommon(ins.Cond, ins.SkipTrue, ins.SkipFalse, regA, regX)
}
func jumpIfCommon(cond JumpTest, skipTrue, skipFalse uint8, regA uint32, value uint32) int {
var ok bool
switch cond {
case JumpEqual:
ok = value == inV
ok = regA == value
case JumpNotEqual:
ok = value != inV
ok = regA != value
case JumpGreaterThan:
ok = value > inV
ok = regA > value
case JumpLessThan:
ok = value < inV
ok = regA < value
case JumpGreaterOrEqual:
ok = value >= inV
ok = regA >= value
case JumpLessOrEqual:
ok = value <= inV
ok = regA <= value
case JumpBitsSet:
ok = (value & inV) != 0
ok = (regA & value) != 0
case JumpBitsNotSet:
ok = (value & inV) == 0
ok = (regA & value) == 0
}
if ok {
return int(ins.SkipTrue)
return int(skipTrue)
}
return int(ins.SkipFalse)
return int(skipFalse)
}
func loadAbsolute(ins LoadAbsolute, in []byte) (uint32, bool) {