Browse Source

Fixed tests

master
parent
commit
6b70946e6e
12 changed files with 212 additions and 97 deletions
  1. +2
    -2
      builtin.go
  2. +12
    -1
      elf_test.go
  3. +51
    -48
      instruction_test.go
  4. +53
    -0
      op_alu.go
  5. +4
    -4
      op_alu_test.go
  6. +8
    -0
      op_byteswap.go
  7. +4
    -0
      op_call.go
  8. +29
    -0
      op_jump.go
  9. +3
    -3
      op_jump_test.go
  10. +1
    -1
      op_load.go
  11. +38
    -38
      op_load_test.go
  12. +7
    -0
      register.go

+ 2
- 2
builtin.go View File

@@ -6,12 +6,12 @@ import (
)

func BuiltinProbeRead(r1, r2, r3, r4, r5 uint64) uint64 {
log.Printf("probe read", r1, r2, r3, r4, r5)
log.Println("probe read", r1, r2, r3, r4, r5)
return math.MaxUint64
}

func BuiltinStrcmp(r1, r2, r3, r4, r5 uint64) uint64 {
log.Printf("strcmp", r1, r2, r3, r4, r5)
log.Println("strcmp", r1, r2, r3, r4, r5)
return math.MaxUint64
}



+ 12
- 1
elf_test.go View File

@@ -1,12 +1,23 @@
package ebpf

import (
"os"
"path/filepath"
"testing"
)

func TestLoadELF(t *testing.T) {
if err := loadELF(filepath.Join("testdata", "vfs-4.19.o")); err != nil {
f, err := os.Open(filepath.Join("testdata", "vfs-4.19.o"))
if err != nil {
if os.IsNotExist(err) {
t.Skip(err)
} else {
t.Fatal(err)
}
return
}
defer f.Close()
if _, err := LoadELF(f); err != nil {
t.Fatal(err)
}
}

+ 51
- 48
instruction_test.go View File

@@ -16,62 +16,64 @@ func TestDisassemble(t *testing.T) {
Name: "alu",
Data: mustUnhex("040100000200000004090000ffffffff0c210000000000001c210000000000002c210000000000003c210000000000004c210000000000005c210000000000006c210000000000007c2100000000000084010000000000009c21000000000000ac21000000000000bc21000000000000cc21000000000000d401000010000000d401000020000000d401000040000000dc01000010000000dc01000020000000dc01000040000000"),
Want: []string{
"add32 r1, 2",
"add32 r9, 4294967295",
"add32 r1, r2",
"sub32 r1, r2",
"mul32 r1, r2",
"div32 r1, r2",
"or32 r1, r2",
"and32 r1, r2",
"lsh32 r1, r2",
"rsh32 r1, r2",
"neg32 r1",
"mod32 r1, r2",
"xor32 r1, r2",
"mov32 r1, r2",
"arsh32 r1, r2",
"le16 r1",
"le32 r1",
"le64 r1",
"be16 r1",
"be32 r1",
"be64 r1",
"add32 R1, 0x2",
"add32 R9, 0xffffffff",
"add32 R1, R2",
"sub32 R1, R2",
"mul32 R1, R2",
"div32 R1, R2",
"or32 R1, R2",
"and32 R1, R2",
"lsh32 R1, R2",
"rsh32 R1, R2",
"neg32 R1",
"mod32 R1, R2",
"xor32 R1, R2",
"mov32 R1, R2",
"arsh32 R1, R2",
"le16 R1",
"le32 R1",
"le64 R1",
"be16 R1",
"be32 R1",
"be64 R1",
},
},
{
Name: "alu-bit",
Want: []string{
"mov32 r0, 0",
"mov32 r1, 1",
"mov32 r2, 2",
"mov32 r3, 3",
"mov32 r4, 4",
"mov32 r5, 5",
"mov32 r6, 6",
"mov32 r7, 7",
"mov32 r8, 8",
"or32 r0, r5",
"or32 r0, 0xa0",
"and32 r0, 0xa3",
"mov32 r9, 0x91",
"and32 r0, r9",
"lsh32 r0, 22",
"lsh32 r0, r8",
"rsh32 r0, 19",
"rsh32 r0, r7",
"xor32 r0, 3",
"xor32 r0, r2",
"exit",
/*
{
Name: "alu-bit",
Want: []string{
"mov32 R0, 0x0",
"mov32 R1, 0x1",
"mov32 R2, 0x2",
"mov32 R3, 0x3",
"mov32 R4, 0x4",
"mov32 R5, 0x5",
"mov32 R6, 0x6",
"mov32 R7, 0x7",
"mov32 R8, 0x8",
"or32 R0, R5",
"or32 R0, 0xa0",
"and32 R0, 0xa3",
"mov32 R9, 0x91",
"and32 R0, R9",
"lsh32 R0, 22",
"lsh32 R0, R8",
"rsh32 R0, 19",
"rsh32 R0, R7",
"xor32 R0, 3",
"xor32 R0, R2",
"exit",
},
},
},
*/
{
Name: "ja",
Data: mustUnhex("b7000000010000000500010000000000b7000000020000009500000000000000"),
Want: []string{
"mov r0, 1",
"mov R0, 0x1",
"ja +1",
"mov r0, 2",
"mov R0, 0x2",
"exit",
},
},
@@ -142,6 +144,7 @@ func (test testInstruction) Run(t *testing.T) {
type testInstructionSuite []testInstruction

func (suite testInstructionSuite) Run(t *testing.T) {
t.Helper()
for _, test := range suite {
t.Run(test.WantString, func(it *testing.T) {
test.Run(it)


+ 53
- 0
op_alu.go View File

@@ -6,6 +6,35 @@ import (

type ALUOp uint16

func (op ALUOp) CString() string {
switch op {
case ALUOpAdd:
return "+"
case ALUOpSub:
return "-"
case ALUOpMul:
return "*"
case ALUOpDiv:
return "/"
case ALUOpOr:
return "|"
case ALUOpAnd:
return "&"
case ALUOpShiftLeft:
return "<<"
case ALUOpShiftRight:
return ">>"
case aluOpNegate:
return "!"
case ALUOpMod:
return "%"
case ALUOpXor:
return "^"
default:
return ""
}
}

func (op ALUOp) Mnemoic() string {
switch op {
case ALUOpAdd:
@@ -76,6 +105,10 @@ func (a ALUOpConstant) String() string {
return fmt.Sprintf("%s32 %s, %#x", a.Op.Mnemoic(), a.Dst, a.Value)
}

func (a ALUOpConstant) CString() string {
return fmt.Sprintf("%s %s= (uint32_t)(%x);", a.Dst, a.Op.CString(), a.Value)
}

// ALUOpRegister executes Dst = Dst <Op> Src.
type ALUOpRegister struct {
Op ALUOp
@@ -96,6 +129,10 @@ func (a ALUOpRegister) String() string {
return fmt.Sprintf("%s32 %s, %s", a.Op.Mnemoic(), a.Dst, a.Src)
}

func (a ALUOpRegister) CString() string {
return fmt.Sprintf("%s %s= %x;", a.Dst, a.Op.CString(), a.Src)
}

// Negate executes Dst = !Dst.
type Negate struct {
Dst Register
@@ -113,6 +150,10 @@ func (a Negate) String() string {
return fmt.Sprintf("neg32 %s", a.Dst)
}

func (a Negate) CString() string {
return fmt.Sprintf("%s = (uint32_t)(!%s);", a.Dst, a.Dst)
}

// ALU64OpConstant executes Dst = Dst <Op> Value.
type ALU64OpConstant struct {
Op ALUOp
@@ -133,6 +174,10 @@ func (a ALU64OpConstant) String() string {
return fmt.Sprintf("%s %s, %#x", a.Op.Mnemoic(), a.Dst, a.Value)
}

func (a ALU64OpConstant) CString() string {
return fmt.Sprintf("%s %s= %#x;", a.Dst, a.Op.CString(), a.Value)
}

// ALU64OpRegister executes Dst = Dst <Op> Src.
type ALU64OpRegister struct {
Op ALUOp
@@ -153,6 +198,10 @@ func (a ALU64OpRegister) String() string {
return fmt.Sprintf("%s %s, %s", a.Op.Mnemoic(), a.Dst, a.Src)
}

func (a ALU64OpRegister) CString() string {
return fmt.Sprintf("%s %s= %s", a.Dst, a.Op.CString(), a.Src)
}

// Negate64 executes Dst = !Dst.
type Negate64 struct {
Dst Register
@@ -170,6 +219,10 @@ func (a Negate64) String() string {
return fmt.Sprintf("neg %s", a.Dst)
}

func (a Negate64) CString() string {
return fmt.Sprintf("%s = !%s", a.Dst, a.Dst)
}

var (
_ Instruction = (*ALUOpConstant)(nil)
_ Instruction = (*ALUOpRegister)(nil)


+ 4
- 4
op_alu_test.go View File

@@ -7,10 +7,10 @@ func TestALU(t *testing.T) {
{
Test: Negate{R1},
WantRaw: RawInstruction{
Op: opClassALU | aluSourceImmediate | uint8(aluOpNegate),
Op: opClassALU | aluSourceImmediate | Opcode(aluOpNegate),
Dst: R1,
},
WantString: "neg32 r1",
WantString: "neg32 R1",
},
}.Run(t)
}
@@ -20,10 +20,10 @@ func TestALU64(t *testing.T) {
{
Test: Negate64{R1},
WantRaw: RawInstruction{
Op: opClassALU64 | aluSourceImmediate | uint8(aluOpNegate),
Op: opClassALU64 | aluSourceImmediate | Opcode(aluOpNegate),
Dst: R1,
},
WantString: "neg r1",
WantString: "neg R1",
},
}.Run(t)
}

+ 8
- 0
op_byteswap.go View File

@@ -36,6 +36,14 @@ func (a ByteSwap) String() string {
return fmt.Sprintf("be%d %s", a.Size, a.Dst)
}

func (a ByteSwap) CString() string {
var endian = "le"
if a.ByteOrder == binary.BigEndian {
endian = "be"
}
return fmt.Sprintf("%s = hto%s%d(%s)", a.Dst, endian, a.Size, a.Dst)
}

func (a ByteSwap) Swap(value uint64) uint64 {
switch {
case a.Size == 16 && a.ByteOrder == binary.LittleEndian:


+ 4
- 0
op_call.go View File

@@ -139,6 +139,10 @@ func (a Call) String() string {
return fmt.Sprintf("call %d", uint32(a))
}

func (a Call) CString() string {
return "" // TODO
}

var (
_ Instruction = (*Call)(nil)
)

+ 29
- 0
op_jump.go View File

@@ -96,6 +96,35 @@ func (cond JumpTest) String() string {
}
}

func (cond JumpTest) CFormat() string {
switch cond {
case JumpEqual:
return "%s == %s"
case JumpGreater:
return "%s > %s"
case JumpGreaterOrEqual:
return "%s >= %s"
case JumpSet:
return "%s & %s"
case JumpNotEqual:
return "%s != %s"
case JumpSignedGreater:
return "(int64_t)(%s) > (int64_t)(%s)"
case JumpSignedGreaterOrEqual:
return "(int64_t)(%s) >= (int64_t)(%s)"
case JumpLess:
return "%s < %s"
case JumpLessOrEqual:
return "%s <= %s"
case JumpSignedLess:
return "(int64_t)(%s) < (int64_t)(%s)"
case JumpSignedLessOrEqual:
return "(int64_t)(%s) <= (int64_t)(%s)"
default:
return ""
}
}

func jumpOpToTest(op Opcode) JumpTest {
switch op {
case jumpOpEqual:


+ 3
- 3
op_jump_test.go View File

@@ -32,7 +32,7 @@ func TestJumpIf(t *testing.T) {
Offset: 0x29a,
Immediate: 0x2a,
},
WantString: "jeq r1, 42, +666",
WantString: "jeq R1, 42, +666",
},
{
Test: JumpIf{
@@ -47,7 +47,7 @@ func TestJumpIf(t *testing.T) {
Offset: 2,
Immediate: 1,
},
WantString: "jsle r2, 1, +2",
WantString: "jsle R2, 1, +2",
},
}
tests.Run(t)
@@ -68,7 +68,7 @@ func TestJumpIfX(t *testing.T) {
Dst: R1,
Offset: 0x29a,
},
WantString: "jeq r1, r2, +666",
WantString: "jeq R1, R2, +666",
},
}
tests.Run(t)


+ 1
- 1
op_load.go View File

@@ -154,7 +154,7 @@ func (a LoadRegister) String() string {
default:
return fmt.Sprintf("# invalid LoadRegister dst=%s, src=%s, size=%d, offset=%d", a.Dst, a.Src, a.Size, a.Offset)
}
return fmt.Sprintf("%s %s, [%s+%d]", mnemonic, a.Dst, a.Src, a.Offset)
return fmt.Sprintf("%s %s, [%s+%#x]", mnemonic, a.Dst, a.Src, a.Offset)
}

type StoreImmediate struct {


+ 38
- 38
op_load_test.go View File

@@ -16,12 +16,12 @@ func TestLoadConstant(t *testing.T) {
Dst: R1,
Immediate: 0x12345678,
},
WantString: "lddw r1, 0x12345678",
WantString: "lddw R1, 0x12345678",
}.Run(t)
}

func TestLoadAbsolute(t *testing.T) {
op := uint8(opClassLoad | modeAbsolute)
op := opClassLoad | modeAbsolute
tests := testInstructionSuite{
{
Test: LoadAbsolute{
@@ -36,7 +36,7 @@ func TestLoadAbsolute(t *testing.T) {
Src: R1,
Immediate: 0xff,
},
WantString: "ldabsb r1, r0, 0xff",
WantString: "ldabsb R1, R0, 0xff",
},
{
Test: LoadAbsolute{
@@ -51,7 +51,7 @@ func TestLoadAbsolute(t *testing.T) {
Dst: R0,
Immediate: 0xffff,
},
WantString: "ldabsh r1, r0, 0xffff",
WantString: "ldabsh R1, R0, 0xffff",
},
{
Test: LoadAbsolute{
@@ -66,7 +66,7 @@ func TestLoadAbsolute(t *testing.T) {
Dst: R0,
Immediate: 0x12345678,
},
WantString: "ldabsw r1, r0, 0x12345678",
WantString: "ldabsw R1, R0, 0x12345678",
},
{
Test: LoadAbsolute{
@@ -81,14 +81,14 @@ func TestLoadAbsolute(t *testing.T) {
Dst: R0,
Immediate: math.MaxUint32,
},
WantString: "ldabsdw r1, r0, 0xffffffff",
WantString: "ldabsdw R1, R0, 0xffffffff",
},
}
tests.Run(t)
}

func TestLoadIndirect(t *testing.T) {
op := uint8(opClassLoad | modeIndirect)
op := opClassLoad | modeIndirect
tests := testInstructionSuite{
{
Test: LoadIndirect{
@@ -103,7 +103,7 @@ func TestLoadIndirect(t *testing.T) {
Src: R1,
Immediate: 0xff,
},
WantString: "ldindb r1, r0, 0xff",
WantString: "ldindb R1, R0, 0xff",
},
{
Test: LoadIndirect{
@@ -118,7 +118,7 @@ func TestLoadIndirect(t *testing.T) {
Dst: R0,
Immediate: 0xffff,
},
WantString: "ldindh r1, r0, 0xffff",
WantString: "ldindh R1, R0, 0xffff",
},
{
Test: LoadIndirect{
@@ -133,7 +133,7 @@ func TestLoadIndirect(t *testing.T) {
Dst: R0,
Immediate: 0x12345678,
},
WantString: "ldindw r1, r0, 0x12345678",
WantString: "ldindw R1, R0, 0x12345678",
},
{
Test: LoadIndirect{
@@ -148,14 +148,14 @@ func TestLoadIndirect(t *testing.T) {
Dst: R0,
Immediate: math.MaxUint32,
},
WantString: "ldinddw r1, r0, 0xffffffff",
WantString: "ldinddw R1, R0, 0xffffffff",
},
}
tests.Run(t)
}

func TestLoadMemory(t *testing.T) {
op := uint8(opClassLoadX | modeMemory)
op := opClassLoadX | modeMemory
tests := testInstructionSuite{
{
Test: LoadRegister{
@@ -170,22 +170,22 @@ func TestLoadMemory(t *testing.T) {
Src: R1,
Offset: 0xff,
},
WantString: "ldxb r0, [r1+255]",
WantString: "ldxb R0, [R1+0xff]",
},
{
Test: LoadRegister{
Dst: R0,
Src: R1,
Size: 2,
Offset: 0xffff,
Offset: 0x7fff,
},
WantRaw: RawInstruction{
Op: op | sizeHalfWord,
Src: R1,
Dst: R0,
Offset: 0xffff,
Offset: 0x7fff,
},
WantString: "ldxh r0, [r1+65535]",
WantString: "ldxh R0, [R1+0x7fff]",
},
{
Test: LoadRegister{
@@ -200,29 +200,29 @@ func TestLoadMemory(t *testing.T) {
Dst: R0,
Offset: 0x1234,
},
WantString: "ldxw r0, [r1+4660]",
WantString: "ldxw R0, [R1+0x1234]",
},
{
Test: LoadRegister{
Dst: R0,
Src: R1,
Size: 8,
Offset: math.MaxUint16,
Offset: math.MaxInt16,
},
WantRaw: RawInstruction{
Op: op | sizeDoubleWord,
Src: R1,
Dst: R0,
Offset: math.MaxUint16,
Offset: math.MaxInt16,
},
WantString: "ldxdw r0, [r1+65535]",
WantString: "ldxdw R0, [R1+0x7fff]",
},
}
tests.Run(t)
}

func TestStore(t *testing.T) {
op := uint8(opClassStore | modeMemory)
op := opClassStore | modeMemory
tests := testInstructionSuite{
{
Test: StoreImmediate{
@@ -237,20 +237,20 @@ func TestStore(t *testing.T) {
Offset: 0xff,
Immediate: 0xff,
},
WantString: "stb [r0+255], 255",
WantString: "stb [R0+0xff], 0xff",
},
{
Test: StoreImmediate{
Dst: R0,
Size: 2,
Offset: 0xffff,
Offset: 0x7fff,
},
WantRaw: RawInstruction{
Op: op | sizeHalfWord,
Dst: R0,
Offset: 0xffff,
Offset: 0x7fff,
},
WantString: "sth [r0+65535], 0",
WantString: "sth [R0+0x7fff], 0x0",
},
{
Test: StoreImmediate{
@@ -265,27 +265,27 @@ func TestStore(t *testing.T) {
Offset: 0x1234,
Immediate: math.MaxUint32,
},
WantString: "stw [r0+4660], 4294967295",
WantString: "stw [R0+0x1234], 0xffffffff",
},
{
Test: StoreImmediate{
Dst: R0,
Size: 8,
Offset: math.MaxUint16,
Offset: math.MinInt16,
},
WantRaw: RawInstruction{
Op: op | sizeDoubleWord,
Dst: R0,
Offset: math.MaxUint16,
Offset: math.MinInt16,
},
WantString: "stdw [r0+65535], 0",
WantString: "stdw [R0-0x8000], 0x0",
},
}
tests.Run(t)
}

func TestStoreMemory(t *testing.T) {
op := uint8(opClassStoreX | modeMemory)
op := opClassStoreX | modeMemory
tests := testInstructionSuite{
{
Test: StoreRegister{
@@ -300,22 +300,22 @@ func TestStoreMemory(t *testing.T) {
Src: R1,
Offset: 0xff,
},
WantString: "stxb [r0+255], r1",
WantString: "stxb [R0+0xff], R1",
},
{
Test: StoreRegister{
Dst: R0,
Src: R1,
Size: 2,
Offset: 0xffff,
Offset: 0x7fff,
},
WantRaw: RawInstruction{
Op: op | sizeHalfWord,
Src: R1,
Dst: R0,
Offset: 0xffff,
Offset: 0x7fff,
},
WantString: "stxh [r0+65535], r1",
WantString: "stxh [R0+0x7fff], R1",
},
{
Test: StoreRegister{
@@ -330,22 +330,22 @@ func TestStoreMemory(t *testing.T) {
Dst: R0,
Offset: 0x1234,
},
WantString: "stxw [r0+4660], r1",
WantString: "stxw [R0+0x1234], R1",
},
{
Test: StoreRegister{
Dst: R0,
Src: R1,
Size: 8,
Offset: math.MaxUint16,
Offset: math.MaxInt16,
},
WantRaw: RawInstruction{
Op: op | sizeDoubleWord,
Src: R1,
Dst: R0,
Offset: math.MaxUint16,
Offset: math.MaxInt16,
},
WantString: "stxdw [r0+65535], r1",
WantString: "stxdw [R0+0x7fff], R1",
},
}
tests.Run(t)


+ 7
- 0
register.go View File

@@ -39,3 +39,10 @@ func (r Register) String() string {
}
return fmt.Sprintf("R%d", uint8(r))
}

func (r Register) CString() string {
if r == RFP {
return "register[RFP]"
}
return fmt.Sprintf("register[R%d]", uint8(r))
}

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