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updating tables

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Amanda Rousseau
2017-03-13 22:24:51 -07:00
parent 26521d2354
commit b260b32c44
1 changed files with 7 additions and 4 deletions
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11
fundamentals3.md
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@@ -47,7 +47,8 @@ Use the search page below or open the [Search Instructions](https://securedorg.g
### Registers ###
#### General-Purpose Registers
#### General-Purpose Registers [[1]][1]
| Register | Description |
| --- | --- |
@@ -75,17 +76,17 @@ Use the search page below or open the [Search Instructions](https://securedorg.g
| ID | Name | Description |
| --- | --- | --- |
| CF | Carry Flag | Set if the last arithmetic operation carried (addition) or borrowed (subtraction) a bit beyond the size of the register | This is then checked when the operation is followed with an add-with-carry or subtract-with-borrow to deal with values too large for just one register to contain |
| CF | Carry Flag | Set if the last arithmetic operation carried (addition) or borrowed (subtraction) a bit beyond the size of the register. This is then checked when the operation is followed with an add-with-carry or subtract-with-borrow to deal with values too large for just one register to contain |
| PF | Parity Flag | Set if the number of set bits in the least significant byte is a multiple of 2 |
| AF | Adjust Flag | Carry of Binary Code Decimal (BCD) numbers arithmetic operations |
| ZF | Zero Flag | Set if the result of an operation is Zero (0) |
| SF | Sign Flag | Set if the result of an operation is negative |
| TF | Trap Flag | Set if step by step debugging |
| IF | Interruption Flag | Set if interrupts are enabled |
| DF | Direction Flag | Stream direction | If set, string operations will decrement their pointer rather than incrementing it, reading memory backwards |
| DF | Direction Flag | Stream direction. If set, string operations will decrement their pointer rather than incrementing it, reading memory backwards |
| OF | Overflow Flag | Set if signed arithmetic operations result in a value too large for the register to contain |
| IOPL | I/O Privilege Level field (2 bits) | I/O Privilege Level of the current process |
| NT | Nested Task flag | Controls chaining of interrupts | Set if the current process is linked to the next process |
| NT | Nested Task flag | Controls chaining of interrupts. Set if the current process is linked to the next process |
| RF | Resume Flag | Response to debug exceptions |
| VM | Virtual-8086 Mode | Set if in 8086 compatibility mode |
| AC | Alignment Check | Set if alignment checking of memory references is done |
@@ -107,4 +108,6 @@ The **EIP** register contains the address of the next instruction to be executed
### The Stack ###
[1]: https://en.wikibooks.org/wiki/X86_Assembly/X86_Architecture
[Anatomy of PE <- Back](https://securedorg.github.io/RE101/section1.2) | [Next -> Section 2](https://securedorg.github.io/RE101/section2)