Cirrus Logic CS485 Manual de usuario descargar pdf (Pagina 12)

CS485G Spring 2015 12

8. Generated x86 assembler (using -O1)

sum:

movl 8(%esp),%eax

addl 4(%esp),%eax

ret

9. Interpretation: x is at 8(%ebp); y is at 4(%ebp); t is in register %eax.

10. Output of objdump:

080483ed <sum>:

80483ed: 8b 44 24 08 mov 0x8(%esp),%eax

80483f1: 03 44 24 04 add 0x4(%esp),%eax

80483f5: c3 ret

11. Same thing with gdb, using command “disassemble sum”:

0x080483ed <+0>: mov 0x8(%esp),%eax

0x080483f1 <+4>: add 0x4(%esp),%eax

0x080483f5 <+8>: ret

12. Same thing with gdb, using command “x/9xb sum”:

0x80483ed <sum>: 0x8b 0x44 0x24 0x08 0x03 0x44 0x24 0x04

0x80483f5 <sum+8>: 0xc3

13. One can even disassemble .EXE ﬁles (from Win32 complations) with

objdump

16 IA32 = x86 architecture

1. 32-bit architecture.

2. You can compile for it even on an x86 64 with the -m32 ﬂag.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 66 67

Sin comentarios

Cirrus Logic CS485 Manual de usuario Pagina 12