67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
|
// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
|
||
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
|
||
|
|
package disasm
|
||
|
|
|
||
|
|
import (
|
||
|
|
"testing"
|
||
|
|
|
||
|
|
"sourcedock.dev/petrbalvin/gasm-sdk/arch"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TestRejectedNaming pins the supplementary arm64 naming table over the
|
||
|
|
// corpus rows whose encodings the decoder refuses: every row's bytes are
|
||
|
|
// the corpus's own expected-encoding comments (machine-checked by the
|
||
|
|
// toolchain's assembler test suite) and every text is the corpus's own
|
||
|
|
// spelling.
|
||
|
|
func TestRejectedNaming(t *testing.T) {
|
||
|
|
for _, tt := range []struct {
|
||
|
|
code []byte
|
||
|
|
text string
|
||
|
|
}{
|
||
|
|
// arm64enc.s: HVC $61428 // 82fe1dd4 and SMC $37977 // 238b12d4.
|
||
|
|
{[]byte{0x82, 0xfe, 0x1d, 0xd4}, "HVC $61428"},
|
||
|
|
{[]byte{0x23, 0x8b, 0x12, 0xd4}, "SMC $37977"},
|
||
|
|
// arm64enc.s: SB // ff3003d5.
|
||
|
|
{[]byte{0xff, 0x30, 0x03, 0xd5}, "SB"},
|
||
|
|
} {
|
||
|
|
ins, err := Decode(arch.ARM64, tt.code, 0)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("% x: %v", tt.code, err)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if ins.Text != tt.text || ins.Len != len(tt.code) {
|
||
|
|
t.Errorf("% x: %q (%d bytes), want %q (%d)",
|
||
|
|
tt.code, ins.Text, ins.Len, tt.text, len(tt.code))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// TestRejectedNamingBoundaries guards the table's edges: the exception
|
||
|
|
// space shapes the corpus does not spell keep the placeholder, and the
|
||
|
|
// neighbours the decoder names itself never reach the table.
|
||
|
|
func TestRejectedNamingBoundaries(t *testing.T) {
|
||
|
|
for _, tt := range []struct {
|
||
|
|
code []byte
|
||
|
|
text string
|
||
|
|
}{
|
||
|
|
// The unallocated corners of the same opc group (op2 00000,
|
||
|
|
// 00100 and 11000), which the corpus does not spell.
|
||
|
|
{[]byte{0x00, 0x00, 0x00, 0xd4}, "???"},
|
||
|
|
{[]byte{0x04, 0x00, 0x00, 0xd4}, "???"},
|
||
|
|
{[]byte{0x60, 0x00, 0x00, 0xd4}, "???"},
|
||
|
|
// BRK and HLT sit in the same space one opc step away and the
|
||
|
|
// decoder names them itself.
|
||
|
|
{[]byte{0x00, 0x00, 0x20, 0xd4}, "BRK $0"},
|
||
|
|
{[]byte{0x00, 0x00, 0x40, 0xd4}, "HLT $0"},
|
||
|
|
} {
|
||
|
|
ins, err := Decode(arch.ARM64, tt.code, 0)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("% x: %v", tt.code, err)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if ins.Text != tt.text {
|
||
|
|
t.Errorf("% x: %q, want %q", tt.code, ins.Text, tt.text)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|