https://github.com/0xffset/x86-assembly

A lot of x86-Assembly programs with C/C++
https://github.com/0xffset/x86-assembly

assembly c low-level-programming nasm register x86

Last synced: 23 days ago
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A lot of x86-Assembly programs with C/C++

• Host: GitHub
• URL: https://github.com/0xffset/x86-assembly
• Owner: 0xffset
• License: mit
• Created: 2020-12-20T16:20:26.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-12-25T18:25:16.000Z (about 4 years ago)
• Last Synced: 2024-11-21T20:12:52.910Z (3 months ago)
• Topics: assembly, c, low-level-programming, nasm, register, x86
• Language: Assembly
• Homepage:
• Size: 47.9 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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x86-Assembly





  A lot of x86-Assembly programs with their counterpart in C/C++ 





### Quickly Assembly x86 References

####  General-Purpose Register

> *General-purpose registers (GPRs) can store both data and addresses, i.e., they are combined data/address registers; in some architectures, the register file is unified so that the GPRs can store floating-point numbers as well.*

> 

> *Wikipedia*

| Register | Common Use  |

|--|--|

| EAX | *Accumulator*|

| EBX | *Memory pointer, base register*

| ECX | *Loop control an counters*

| EDX | *Interger multiplication and division*

| ESI | *String instruction source pointer and index register*

| EDI | *String instruction destination  pointer and index register*

| ESP | *Stack pointer*

| EBP | *Stack frame pointer*

### Instruction Operants

|Type| Example  |  Equal to|

|--|--|--|

| Immediate | *mov eax,45*  |*eax = 45*|

|| *imul ebx, 12h* | ebx *= 0x12|

|| *xor dl, 44h* | ebx *= 0x44

|| *add esi,8* | *esi ^= 8*

|Register| *mov eax, ebx* | *eax = ebx*

|| *inc ecx* | *ecx += 1*

|| *add ebx,esi* | *ebx += esi*

|| *mul ebx* | edx:eax = eax * ebx

|Memory| *mov eax,[ebx]* | eax= *ebx

|| add eax,[val] | eax += *val

|| or ecx,[ebx+esi] | ecx |= *(ebx + asi)

|| sub word ptr [edi],12 | *  (short*) edit -=12