Under Linux, C++, and GCC, can I get a physical address for a given virtual address? I know I won’t be able to manipulate the physical address as a physical address.
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Under Linux, C++, and GCC, can I get a physical address for a given virtual address? I know I won’t be able to manipulate the physical address as a physical address.
Nope. There’s no guarantee that a virtual address is based off a physical address (it may be a mapped file with no representation in RAM, for instance.) As well, the OS is free to move virtual addresses around in physical memory at any time, so there’s no guarantee that a physical address will remain correct or valid.
Why do you think you need a physical address? What are you trying to accomplish?