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Userland: Add LibSystem and funnel all syscalls through it

This achieves two things:

- Programs can now intentionally perform arbitrary syscalls by calling
  syscall(). This allows us to work on things like syscall fuzzing.

- It restricts the ability of userspace to make syscalls to a single
  4KB page of code. In order to call the kernel directly, an attacker
  must now locate this page and call through it.
This commit is contained in:
Andreas Kling 2021-02-05 12:16:30 +01:00
parent 4df3a34bc2
commit e87eac9273
47 changed files with 164 additions and 47 deletions

View file

@ -504,7 +504,6 @@ inline uintptr_t invoke(Function function, T1 arg1, T2 arg2, T3 arg3)
#define __ENUMERATE_SYSCALL(x) using Syscall::SC_##x;
ENUMERATE_SYSCALLS(__ENUMERATE_SYSCALL)
#undef __ENUMERATE_SYSCALL
#define syscall Syscall::invoke
}