malloc - Allocate Memory Block
malloc allocates a block of 'Size' bytes.
Returns: On R0: Pointer to allocated space.
Returns NULL if the space cannot be allocated.
Notes:
One argument pushed into Stack = number of bytes to be allocated.
Use free to deallocate block allocated with malloc.
Example:
.text
main: .word 0
pushl $0x100
calls $1, .malloc
pushl r0
pushal format
calls $2, .printf
pushl $0x100
calls $1, .malloc
pushl r0
pushal format
calls $2, .printf
pushl $0x100
calls $1, .malloc
pushl r0
pushal format
calls $2, .printf
pushl $0x1119
calls $1, .free
pushl $0x100
calls $1, .malloc
pushl r0
pushal format
calls $2, .printf
pushl $0
calls $1, .exit
.org 0x1000
.data
format: .asciz "Address: 0x%08X\n"