View Compilation Error

0_0_13108998_5032.cpp:3:27: error: 'malloc' was not declared in this scope
 char *p=(char*)malloc(size)+size;  
                           ^
0_0_13108998_5032.cpp:4:25: error: expected ')' before '::' token
 __asm__("movl%0,%%esp\n"::"r"(p));  
                         ^