NASM-Template
This is a template for writing assembly using NASM.
It has a template "main" file, makefile, and a few helper functions "IO.inc" to help with I/O without having to use Linux syscalls explicitly.
I wrote these functions for the AES Encryption project, so that's why some functions are oddly specific.
Function Guide:
| Function | Parameters | Returns | Description |
|---|---|---|---|
| ReadChar | N/A | al: Character read | Reads a character from STDIN and saves it in al. |
| WriteChar | al: Character | N/A | Writes the specified ASCII character to STDOUT. |
| ReadString | ecx: String max length esi: Address of storage location | eax: Number of bytes read | Reads a string from STDIN and saves it at the specified address. |
| WriteString | ecx: Length of the string esi: Address of the string | N/A | Writes the specified string to STDOUT. |
| WriteLine | N/A | N/A | Writes a new line ('\n') to STDOUT. |
| WriteDec | eax: Value to be written | N/A | Writes the specified value in base-10 (Decimal) to STDOUT. |
| ReadHexByte | N/A | al: Value read | Reads a hex byte from STDIN, without 0x or h. Ex: 3A or F5 |
| WriteHex | eax: Value to be written | N/A | Writes the specified hex value to STDOUT. |
| Print4x4Matrix | esi: byte array of length 16 | N/A | Write the array as a 4x4 hex grid. |