4 commits

Author	SHA1	Message	Date
Andreas Kling	c8edcf1d71	Kernel: Don't ignore validation result in ptrace(PT_PEEK) ... Also mark all of the address validation functions [[nodiscard]] to turn this kind of bug into a compile error in the future.	2020-04-13 22:40:38 +02:00
Andreas Kling	e432a27676	Kernel: Use copy_from_user() in ptrace(PT_PEEK)	2020-04-13 22:39:07 +02:00
Itamar	50fd2cabff	ptrace: Report error in PT_PEEK via errno ... The syscall wrapper for ptrace needs to return the peeked value when using PT_PEEK. Because of this, the user has to check errno to detect an error in PT_PEEK. This commit changes the actual syscall's interface (only for PT_PEEK) to allow the syscall wrapper to detect an error and change errno.	2020-04-13 00:53:22 +02:00
Itamar	9e51e295cf	ptrace: Add PT_SETREGS ... PT_SETTREGS sets the regsiters of the traced thread. It can only be used when the tracee is stopped. Also, refactor ptrace. The implementation was getting long and cluttered the alraedy large Process.cpp file. This commit moves the bulk of the implementation to Kernel/Ptrace.cpp, and factors out peek & poke to separate methods of the Process class.	2020-04-13 00:53:22 +02:00