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Here is the disassembly of C procedure multstore which calls mult2 to multiply two numbers together and then stores the result into a memory location
Here is the disassembly of C procedure multstore which calls mult2 to multiply two numbers together and then stores the result into a memory location pointed to by its third parameter (gdb) disass multstore 0x000000000040047c: 0x000000000040047d: 0x0000000000400480: 0x0000000000400485: 0x0000000000400488: 0x0000000000400489: ush trbx mov calla 0x400474 mov %rax, (%rbx) retq (gdb) disass mult2 0x0000000000400474: 0x0000000000400477: 0x000000000040047b: mov imul retq %rsi, %rax trdi , trax When multstore is called, there is an unknown return address on the stack. Referring to the disassembly, sketch the stack after each instruction that changes the stack. Also show the program counter %rip. Step 1 has been done for you as an example ult Unknown return address %rsp 0x40047d %rip After retq in mult2 0 bx in multsto Here is the disassembly of C procedure multstore which calls mult2 to multiply two numbers together and then stores the result into a memory location pointed to by its third parameter (gdb) disass multstore 0x000000000040047c: 0x000000000040047d: 0x0000000000400480: 0x0000000000400485: 0x0000000000400488: 0x0000000000400489: ush trbx mov calla 0x400474 mov %rax, (%rbx) retq (gdb) disass mult2 0x0000000000400474: 0x0000000000400477: 0x000000000040047b: mov imul retq %rsi, %rax trdi , trax When multstore is called, there is an unknown return address on the stack. Referring to the disassembly, sketch the stack after each instruction that changes the stack. Also show the program counter %rip. Step 1 has been done for you as an example ult Unknown return address %rsp 0x40047d %rip After retq in mult2 0 bx in multsto
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