tests,base: Added GTests for exec_ecoff.h and exec_aout.h

Change-Id: Iec76ba24a06425caefd28d640c6479720f401c06
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/22323
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>

3 files changed, 468 insertions, 0 deletions

diff --git a/src/base/loader/exec_aout.test.cc b/src/base/loader/exec_aout.test.cc
new file mode 100644
index 000000000..97419e47f
--- /dev/null
+++ b/src/base/loader/exec_aout.test.cc
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2019 The Regents of the University of California
+ * All rights reserved
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Bobby R. Bruce
+ */
+
+
+#include <gtest/gtest.h>
+
+#include "base/loader/exec_aout.h"
+
+#define OMAGIC_STRUCT (*((const aout_exechdr *)omagic))
+#define NMAGIC_STRUCT (*((const aout_exechdr *)nmagic))
+#define ZMAGIC_STRUCT (*((const aout_exechdr *)zmagic))
+#define NO_MAGIC_STRUCT (*((const aout_exechdr *)no_magic))
+
+#if (defined(_BIG_ENDIAN) || !defined(_LITTLE_ENDIAN))\
+    && BYTE_ORDER==BIG_ENDIAN
+const uint8_t omagic[] {
+    0x01, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t nmagic[] {
+    0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t zmagic[] {
+    0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t no_magic[] {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x01, 0x00
+};
+#elif defined(_LITTLE_ENDIAN) || BYTE_ORDER==LITTLE_ENDIAN
+const uint8_t omagic[] {
+    0x07, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t nmagic[] {
+    0x08, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t zmagic[] {
+    0x0B, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t no_magic[] {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x01
+};
+#else
+    #error Invalid Endianess
+#endif
+
+TEST(ExecAoutTest, IsNotBadMagicNumber)
+{
+    EXPECT_FALSE(N_BADMAG(OMAGIC_STRUCT));
+    EXPECT_FALSE(N_BADMAG(NMAGIC_STRUCT));
+    EXPECT_FALSE(N_BADMAG(ZMAGIC_STRUCT));
+}
+
+TEST(ExecAoutTest, IsBadMagicNumber)
+{
+    EXPECT_TRUE(N_BADMAG(NO_MAGIC_STRUCT));
+}
+
+TEST(ExecAoutTest, AlignNotZmagic)
+{
+    /*
+     * N_ALIGN will return x if the aout_exechdr does not have ZMAGIC as a
+     * magic number.
+     */
+    int64_t x = 0xABCD;
+    EXPECT_EQ(x, N_ALIGN(OMAGIC_STRUCT, x));
+    EXPECT_EQ(x, N_ALIGN(NMAGIC_STRUCT, x));
+    EXPECT_EQ(x, N_ALIGN(NO_MAGIC_STRUCT, x));
+}
+
+TEST(ExecAoutTest, AlignIsZmagic)
+{
+    /*
+     * N_ALIGN will round up X by AOUT_LDPGSZ (1 << 13) if the aout_exechdr
+     * has ZMAGIC as a magic number.
+     */
+    int64_t x = (1 << 20) + (1 << 18) + (1 << 12) + (1 << 5) + 1;
+    EXPECT_EQ((1 << 20) + (1 << 18) + (1 << 13), N_ALIGN(ZMAGIC_STRUCT, x));
+}
+
+TEST(ExecAoutTest, AlignIsZmagicNoRounding)
+{
+    /*
+     * In this case, there's no rounding needed.
+     */
+    int64_t x = (1 << 20) + (1 << 18) + (1 << 13);
+    EXPECT_EQ(x, N_ALIGN(ZMAGIC_STRUCT, x));
+}
\ No newline at end of file
diff --git a/src/base/loader/exec_ecoff.h b/src/base/loader/exec_ecoff.h
index a076afbab..4b4c6f422 100644
--- a/src/base/loader/exec_ecoff.h
+++ b/src/base/loader/exec_ecoff.h
@@ -37,6 +37,8 @@
 #ifndef	_SYS_EXEC_ECOFF_H_
 #define	_SYS_EXEC_ECOFF_H_
 
+#include "arch/alpha/ecoff_machdep.h"
+
 struct ecoff_filehdr {
         coff_ushort f_magic;	/* magic number */
         coff_ushort f_nscns;	/* # of sections */
diff --git a/src/base/loader/exec_ecoff.test.cc b/src/base/loader/exec_ecoff.test.cc
new file mode 100644
index 000000000..f43b956dc
--- /dev/null
+++ b/src/base/loader/exec_ecoff.test.cc
@@ -0,0 +1,323 @@
+/*
+ * Copyright (c) 2019 The Regents of the University of California
+ * All rights reserved
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Bobby R. Bruce
+ */
+
+
+#include <gtest/gtest.h>
+
+#include "base/loader/exec_ecoff.h"
+
+#define OMAGIC_STRUCT (*((const ecoff_exechdr *)omagic))
+#define NMAGIC_STRUCT (*((const ecoff_exechdr *)nmagic))
+#define ZMAGIC_STRUCT (*((const ecoff_exechdr *)zmagic))
+#define NO_MAGIC_STRUCT (*((const ecoff_exechdr *)no_magic))
+
+#if (defined(_BIG_ENDIAN) || !defined(_LITTLE_ENDIAN))\
+    && BYTE_ORDER==BIG_ENDIAN
+const uint8_t zmagic[] = {
+    // ecoff_filehdr
+    0x01, 0x0B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+    // ecoff_aouthdr
+    0x01, 0x0B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t nmagic[] = {
+    //ecoff_filehdr
+    0x01, 0x08, 0x00, 0x0F, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
+
+    //ecoff_aouthdr
+    0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t omagic[] = {
+    //ecoff_filehdr
+    0x01, 0x07, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+    //ecoff_aouthdr
+    0x01, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+#elif defined(_LITTLE_ENDIAN) || BYTE_ORDER==LITTLE_ENDIAN
+const uint8_t zmagic[] = {
+    // ecoff_filehdr
+    0x0B, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+    // ecoff_aouthdr
+    0x0B, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t nmagic[] = {
+    //ecoff_filehdr
+    0x08, 0x01, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,
+
+    //ecoff_aouthdr
+    0x08, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+const uint8_t omagic[] = {
+    //ecoff_filehdr
+    0x07, 0x01, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+    //ecoff_aouthdr
+    0x07, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+#else
+    #error Invalid Endianess
+#endif
+
+
+
+TEST(ExecEcoffTest, Round)
+{
+    /*
+     * Note: ECOFF_ROUND always rounds up.
+     */
+    EXPECT_EQ((1 << 10) + (1 << 8) + (1 << 6),
+        ECOFF_ROUND((1 << 10) + (1 << 8) + (1 << 5) + (1 << 4) + (1 << 1),
+                    (1 << 5)));
+
+    EXPECT_EQ((1 << 10) + (1 << 8) + (1 << 5),
+        ECOFF_ROUND((1 << 10) + (1 << 8) + (1 << 4) + (1 << 1),
+                    (1 << 5)));
+
+    EXPECT_EQ((1 << 10) + (1 << 8) + (1 << 6),
+        ECOFF_ROUND((1 << 10) + (1 << 8) + (1 << 5) + (1 << 1),
+                    (1 << 5)));
+}
+
+TEST(ExecEcoffTest, NoRounding)
+{
+    EXPECT_EQ((1 << 10) + (1 << 8) + (1 << 5),
+        ECOFF_ROUND((1 << 10) + (1 << 8) + (1 << 5),
+                    (1 << 5)));
+}
+
+TEST(ExecEcoffTest, BlockAlignWithoutZmagic)
+{
+    /*
+     * ECOFF_BLOCK_ALIGN will return "value" if "ep->a.magic" is not
+     * ECOFF_ZMAGIC.
+     */
+    u_int64_t value = 0XFFFF;
+
+    EXPECT_EQ(value, ECOFF_BLOCK_ALIGN(&OMAGIC_STRUCT, value));
+    EXPECT_EQ(value, ECOFF_BLOCK_ALIGN(&OMAGIC_STRUCT, value));
+}
+
+TEST(ExecEcoffTest, BlockAlignWithZmagic)
+{
+    /*
+     * ECOFF_BLOCK_ALIGN will return "value" rounded ECOFF_LDPGSZ (1 << 12)
+     * if "ep->a.magic" is ECOFF_ZMAGIC. This uses ECOFF_ROUND, so will only
+     * round up.
+     */
+    u_int64_t value1 = (1 << 14) + (1 << 13) + (1 << 10) + (1 << 8);
+    u_int64_t expected_output1 = (1 << 14) + (1 << 13) + (1 << 12);
+    EXPECT_EQ(expected_output1, ECOFF_BLOCK_ALIGN(&ZMAGIC_STRUCT, value1));
+
+    u_int64_t value2 = (1 << 10) + (1 << 8);
+    u_int64_t expected_output2 = (1 << 12) ;
+    EXPECT_EQ(expected_output2, ECOFF_BLOCK_ALIGN(&ZMAGIC_STRUCT, value2));
+}
+
+TEST(ExecEcoffTest, SegmentAlignWithZmagic)
+{
+    /*
+     * ECOFF_SEGMENT_ALIGN will round "value" rounded by ECOFF_LDPGZ (1 << 12)
+     * if "ep->amagic" is ECOFF_ZMAGIC.
+     */
+    u_int64_t value1 = (1 << 14) + (1 << 13) + (1 << 10) + (1 << 8);
+    u_int64_t expected_output1 = (1 << 14) + (1 << 13) + (1 << 12);
+    EXPECT_EQ(expected_output1, ECOFF_SEGMENT_ALIGN(&ZMAGIC_STRUCT, value1));
+
+    u_int64_t value2 = (1 << 10) + (1 << 8);
+    u_int64_t expected_output2 = (1 << 12) ;
+    EXPECT_EQ(expected_output2, ECOFF_SEGMENT_ALIGN(&ZMAGIC_STRUCT, value2));
+}
+
+TEST(ExecEcoffTest, SegmentAlignWithoutZmagic)
+{
+    /*
+     * ECOFF_SEGMENT_ALIGN will return value rounded by the
+     * ECOFF_SEGMENT_ALIGNMENT of ep (ECOFF_SEGMENT_ALIGNMENT is defined in
+     * "arch/alpha/ecoff_machdep.h") if "ep->amagic" is not ECOFF_ZMAGIC.
+     *
+     * ECOFF_SEGMENT_ALIGNMENT(ep) will return 8 if the 2nd LSB in
+     * "(ep)->f.f_flags" is 0 and 16 if it is 1.
+     *
+     * "(nmagic)->f.f_flags" is 0x2, and therefore ECOFF_SEGMENT_ALIGN will
+     * round value by (1 << 4). "(omagic)->f.f_flags" is 0x0 and, in this
+     * case, ECOFF_SEGMENT_ALIGN will round value by (1 << 3).
+     */
+
+    u_int64_t value = (1 << 14) + (1 << 13) + (1 << 8) + (1 << 4) + (1 << 2)
+                     + (1 << 1);
+
+    EXPECT_EQ((1 << 14) + (1 << 13) + (1 << 8) + (1 << 5),
+        ECOFF_SEGMENT_ALIGN(&NMAGIC_STRUCT, value)); // Round by (1 << 4).
+    EXPECT_EQ((1 << 14) + (1 << 13) + (1 << 8) + (1 << 4) + (1 << 3),
+        ECOFF_SEGMENT_ALIGN(&OMAGIC_STRUCT, value)); // Round by (1 << 3).
+}
+
+TEST(ExecEcoffTest, TxtOffWithMagic)
+{
+    /*
+     * ECOFF_TXTOFF will return 0 if "(ep)->a.magic" is ECOFF_ZMAGIC
+     */
+    EXPECT_EQ(0, ECOFF_TXTOFF(&ZMAGIC_STRUCT));
+}
+
+TEST(ExecEcoffTest, TxtOffWithoutMagic)
+{
+    /*
+     * If "(ep)->a.magic" is not ECOFF_ZMAGIC, ECOFF_TXTOFF will return
+     * "(ep)->f.f_nscns" multiplied by ECOFF_HDR_SIZE (sizeof ecoff_scnhdr)
+     * plus the size of ecoff_exechdr, roundeded by ECOFF_SEGMENT_ALIGNMENT.
+     * The value of ECOFF_SEGMENT_ALIGNMENT will return (1 << 3) if the 2nd
+     * LSB in "(ep)->f.f_flags" is 0 and (1 << 4) if it's one.
+     *
+     * In our setup (omagic)->f.f_flags is 0x0 and (nmagic)->f.f_flags is 0x2.
+     * (omagic)->f.f_nscns is 0xA, and (nmagic)->f.f_nscns is 0xF.
+     */
+
+    /*
+     * (sizeof omagic) * 0xA + (sizeof omagic), rounded by (1 << 3).
+     */
+    u_int64_t expected_output_omagic = ECOFF_ROUND(
+                                        (sizeof(struct ecoff_scnhdr)) * 0xA
+                                        + (sizeof(struct ecoff_exechdr)),
+                                        (1 << 3));
+    EXPECT_EQ(expected_output_omagic, ECOFF_TXTOFF(&OMAGIC_STRUCT));
+
+    /*
+     * (sizeof nmagic) * 0xF + (sizeof nmagic), rounded by (1 << 4).
+     */
+    u_int64_t expected_output_nmagic = ECOFF_ROUND(
+                                        (sizeof(struct ecoff_scnhdr) * 0xF
+                                        + (sizeof(struct ecoff_exechdr))),
+                                        (1 << 4));
+    EXPECT_EQ(expected_output_nmagic, ECOFF_TXTOFF(&NMAGIC_STRUCT));
+}
+
+TEST(ExecEcoffTest, DatOffWithMagic)
+{
+    /*
+     * f (ep)->a.magic is ECOFF_ZMAGIC, ECOFF_DATOFF will return
+     * (ep)->a.tsize plus ECOFF_TXT(ep), rounded by ECOFF_LDPGSZ (1 << 12).
+     *
+     * (zmagic)->a.tsize is 0xF.
+     */
+
+    u_int64_t expected_output = ECOFF_ROUND(
+                            0xF + ECOFF_TXTOFF(&ZMAGIC_STRUCT), (1 << 12));
+    EXPECT_EQ(expected_output, ECOFF_DATOFF(&ZMAGIC_STRUCT));
+}
+
+TEST(ExecEcoffTest, DatOffWithoutMagic)
+{
+    /*
+     * ECOFF_DATOFF will return (ep)->a.tsize plus ECOFF_TXTOFF(ep) if
+     * (ep)->a.magic is not ECOFF_ZMAGIC.
+     *
+     * (nmagic)->a.tsize is 0xA.
+     * (omagic)->a.tsize is 0x1.
+     */
+
+    u_int64_t expected_output_nmagic = 0xA + ECOFF_TXTOFF(&NMAGIC_STRUCT);
+    EXPECT_EQ(expected_output_nmagic, ECOFF_DATOFF(&NMAGIC_STRUCT));
+
+    u_int64_t expected_output_omagic = 0x1 + ECOFF_TXTOFF(&OMAGIC_STRUCT);
+    EXPECT_EQ(expected_output_omagic, ECOFF_DATOFF(&OMAGIC_STRUCT));
+}
\ No newline at end of file