venus.w questions

• asm code containing %0,what does that mean?
• Must IRET be used when returning from an interrupt?
• Different addresses in ELF header and process virtual memory
• something about inet_ntoa()
• how does the OS know the real size of the physical memory?
• Why does iret from a page fault handler generate interrupt 13 (general protection fault) and error code 0x18?
• where should the .bss section of ELF file take in memory?
• Does mmap really copy data to the memory?
• When should errno be assigned to ENOMEM?
• Is there something wrong with my spin lock?

venus.w answers