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Kernel+LibC+crash: Add mprotect() syscall

This patch adds the mprotect() syscall to allow changing the protection
flags for memory regions. We don't do any region splitting/merging yet,
so this only works on whole mmap() regions.

Added a "crash -r" flag to verify that we crash when you attempt to
write to read-only memory. :^)
This commit is contained in:
Andreas Kling 2019-08-12 19:33:24 +02:00
parent 4917445e2e
commit 7d6689055f
7 changed files with 36 additions and 1 deletions

View file

@ -145,6 +145,7 @@ public:
void* sys$mmap(const Syscall::SC_mmap_params*);
int sys$munmap(void*, size_t size);
int sys$set_mmap_name(void*, size_t, const char*);
int sys$mprotect(void*, size_t, int prot);
int sys$select(const Syscall::SC_select_params*);
int sys$poll(pollfd*, int nfds, int timeout);
ssize_t sys$get_dir_entries(int fd, void*, ssize_t);