tests/qtest/boot-sector.c

17 #define LOW(x) ((x) & 0xff)
20 #define SIGNATURE 0xdead
21 #define SIGNATURE_OFFSET 0x10
22 #define BOOT_SECTOR_ADDRESS 0x7c00
38     [0x00] = 0xb8,
39     [0x01] = 0x00,
40     [0x02] = 0x00,
42     [0x03] = 0x8e,
43     [0x04] = 0xd8,
45     /* 7c05: mov $0xdead,%ax */
46     [0x05] = 0xb8,
47     [0x06] = LOW(SIGNATURE),
48     [0x07] = HIGH(SIGNATURE),
49     /* 7c08:  mov %ax,0x7c10 */
50     [0x08] = 0xa3,
51     [0x09] = LOW(SIGNATURE_ADDR),
52     [0x0a] = HIGH(SIGNATURE_ADDR),
55     [0x0b] = 0xfa,
57     [0x0c] = 0xf4,
58     /* 7c0e: jmp 0x7c07=0x7c0f-3 */
59     [0x0d] = 0xeb,
60     [0x0e] = LOW(-3),
61     /* We mov 0xdead here: set value to make debugging easier */
62     [SIGNATURE_OFFSET] = LOW(0xface),
63     [SIGNATURE_OFFSET + 1] = HIGH(0xface),
65     [0x1FE] = 0x55,
66     [0x1FF] = 0xAA,
71     0x00, 0x08, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00,  /* Program status word  */
72     0x02, 0x00, 0x00, 0x18, 0x60, 0x00, 0x00, 0x50,  /* Magic:               */
73     0x02, 0x00, 0x00, 0x68, 0x60, 0x00, 0x00, 0x50,  /* see linux_s390_magic */
74     0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40   /* in the s390-ccw bios */
77     0xa7, 0xf4, 0x00, 0x08,                                /* j 0x10010 */
78     0x00, 0x00, 0x00, 0x00,
79     'S', '3', '9', '0',
80     'E', 'P', 0x00, 0x01,
81     0xa7, 0x39, HIGH(SIGNATURE_ADDR), LOW(SIGNATURE_ADDR), /* lghi r3,0x7c10 */
82     0xa7, 0x48, LOW(SIGNATURE), HIGH(SIGNATURE),           /* lhi r4,0xadde */
83     0x40, 0x40, 0x30, 0x00,                                /* sth r4,0(r3) */
84     0xa7, 0xf4, 0xff, 0xfa                                 /* j 0x10010 */
96     if (fd < 0) {  in boot_sector_init()
102         /* Q35 requires a minimum 0x7e000 bytes disk (bug or feature?) */  in boot_sector_init()
103         len = MAX(0x7e000, sizeof(x86_boot_sector));  in boot_sector_init()
113         len = 0x10000 + sizeof(s390x_code);  in boot_sector_init()
116         memcpy(&boot_code[0x10000], s390x_code, sizeof(s390x_code));  in boot_sector_init()
131     return 0;  in boot_sector_init()
151     for (i = 0; i < TEST_CYCLES; ++i) {  in boot_sector_test()
157             qtest_writeb(qts, SIGNATURE_ADDR, 0x00);  in boot_sector_test()