How can I use these functions in assembly? 1.malloc 2. brk?

using malloc in c, I need to cast the return value. shall I handle it in assembly as well?


how about brk? what should be done before calling it in assembly?

How can I use these


functions in assembly? 1.malloc 2. brk?
You don't need to cast, as in assembly theren't any types basically (not quite true, but you know).





You simply need to follow the calling conventions of your architecture. So for intel architectures, it should be something like:





// Save Caller-saved register


push reg1;


push reg2;


....


...





// Pass argument


push $512 // need array of 512 bytes





// Call


call malloc





// Save Value: Address is in eax


mov %eax, dest





// Rescue Caller-saved Registers


...


pop reg2


pop reg1