User`s guide

Examining Memory and Disassembling Code

For example, to display 10 disassembled machine instructions starting at the

current address of the program counter, enter:

(dbx) $pc/10i

*[main:26, 0x400290] sw zero,28(sp)

[main:27, 0x400294] sw zero,24(sp)

[main:29, 0x400298] lw t1,28(sp)

[main:29, 0x40029c] lw t2,32(sp)

[main:29, 0x4002a0] nop

[main:29, 0x4002a4] slt at,t1,t2

[main:29, 0x4002a8] beq at,zero,0x4002ec

[main:29, 0x4002ac] nop

[main:31, 0x4002b0] lw t3,28(sp)

[main:31, 0x4002b4] nop

To disassemble another 10 lines, enter:

(dbx) ./

[main:31, 0x4002b8] addiu t4,t3,1

[main:31, 0x4002bc] sw t4,28(sp)

[main:32, 0x4002c0] lw t5,24(sp)

[main:32, 0x4002c4] lw t6,28(sp)

[main:32, 0x4002c8] nop

[main:32, 0x4002cc] addu t7,t5,t6

[main:32, 0x4002d0] sw t7,24(sp)

[main:33, 0x4002d4] lw t8,28(sp)

[main:33, 0x4002d8] lw t9,32(sp)

[main:33, 0x4002dc] nop

To examine ten 32-bit words starting at address 0x7fffc754, and print those

whose least signiﬁcant byte is hexadecimal 0x19, enter:

(dbx) 0x7fffc754 / 10 L 0x19 0xff

7fffc758: 00000019

f print a single-precision real number

g print a double-precision real number

Table 7-2 (continued) Memory Display Format Codes

Format Code Displays Memory in the Format