// satisfies io.Seeker.
func TestReadTruncation(t *testing.T) {
	var ss []string
	for _, p := range []string{
		"testdata/gnu.tar",
		"testdata/ustar-file-reg.tar",
		"testdata/pax-path-hdr.tar",
		"testdata/sparse-formats.tar",
	} {
		buf, err := os.ReadFile(p)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		ss = append(ss, string(buf))
	}

			// still want to remove the tv_ prefix.
			// The check for "orig_" here handles orig_eax in the
			// x86 ptrace register sets, which otherwise have all fields
			// with reg_ prefixes.
			if strings.HasPrefix(n.Name, "orig_") || strings.HasPrefix(n.Name, "_") {
				continue
			}
			i := strings.Index(n.Name, "_")
			if i < 0 {
				continue
			}
			if prefix == "" {

pkg syscall (darwin-arm64), const DT_FIFO ideal-int
pkg syscall (darwin-arm64), const DT_LNK = 10
pkg syscall (darwin-arm64), const DT_LNK ideal-int
pkg syscall (darwin-arm64), const DT_REG = 8
pkg syscall (darwin-arm64), const DT_REG ideal-int
pkg syscall (darwin-arm64), const DT_SOCK = 12
pkg syscall (darwin-arm64), const DT_SOCK ideal-int
pkg syscall (darwin-arm64), const DT_UNKNOWN = 0

pkg syscall (freebsd-arm64), const DT_FIFO ideal-int
pkg syscall (freebsd-arm64), const DT_LNK = 10
pkg syscall (freebsd-arm64), const DT_LNK ideal-int
pkg syscall (freebsd-arm64), const DT_REG = 8
pkg syscall (freebsd-arm64), const DT_REG ideal-int
pkg syscall (freebsd-arm64), const DT_SOCK = 12
pkg syscall (freebsd-arm64), const DT_SOCK ideal-int
pkg syscall (freebsd-arm64), const DT_UNKNOWN = 0

	// Expect (SB), (FP), (PC), or (SP)
	p.get('(')
	reg := p.get(scanner.Ident).String()
	p.get(')')
	p.setPseudoRegister(a, reg, isStatic, prefix)
}

// setPseudoRegister sets the NAME field of addr for a pseudo-register reference such as (SB).
func (p *Parser) setPseudoRegister(addr *obj.Addr, reg string, isStatic bool, prefix rune) {
	if addr.Reg != 0 {
		p.errorf("internal error: reg %s already set in pseudo", reg)
	}
	switch reg {

pkg syscall (freebsd-riscv64), const DT_LNK = 10 #53466
pkg syscall (freebsd-riscv64), const DT_LNK ideal-int #53466
pkg syscall (freebsd-riscv64), const DT_REG = 8 #53466
pkg syscall (freebsd-riscv64), const DT_REG ideal-int #53466
pkg syscall (freebsd-riscv64), const DT_SOCK = 12 #53466
pkg syscall (freebsd-riscv64), const DT_SOCK ideal-int #53466
pkg syscall (freebsd-riscv64), const DT_UNKNOWN = 0 #53466

Joe Tsai <******@****.***> 1443691829 -0700

	VPGATHERQQ Y2, (BP)(Y20*2), Y3  // ERROR "invalid instruction"
	// YzrMulti4 expects exactly 4 registers referenced by REG_LIST.
	// TODO(quasilyte): improve error message (#21860).
	V4FMADDPS (AX), [Z0-Z4], K1, Z7  // ERROR "invalid instruction"
	V4FMADDPS (AX), [Z0-Z0], K1, Z7  // ERROR "invalid instruction"
	// Invalid ranges in REG_LIST (low > high).
	// TODO(quasilyte): improve error message (#21860).

pkg syscall (windows-386), const REG_BINARY = 3
pkg syscall (windows-386), const REG_DWORD = 4
pkg syscall (windows-386), const REG_DWORD_BIG_ENDIAN = 5
pkg syscall (windows-386), const REG_DWORD_LITTLE_ENDIAN = 4
pkg syscall (windows-386), const REG_EXPAND_SZ = 2
pkg syscall (windows-386), const REG_FULL_RESOURCE_DESCRIPTOR = 9
pkg syscall (windows-386), const REG_LINK = 6

			} else {
				a.Reg = arm64.REG_SXTW + Rnum
			}
		case "SXTX":
			if a.Type == obj.TYPE_MEM {
				a.Index = arm64.REG_SXTX + Rnum
			} else {
				a.Reg = arm64.REG_SXTX + Rnum
			}
		case "LSL":
			a.Index = arm64.REG_LSL + Rnum
		default:
			return errors.New("unsupported general register extension type: " + ext)

		}
	} else if reg <= arm64.REG_V31 && reg >= arm64.REG_V0 {