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6211 commits

Author SHA1 Message Date
Idan Horowitz 39ecb832e4 Kernel: Don't try to dispatch urgent signals for kernel crashes 
If we crashed in the kernel there's no point to sending a signal to the
active process, we're going to panic soon anyway.
 2021-12-06 19:36:42 +01:00
Idan Horowitz 548488f050 Kernel: Terminate current thread immediately on unhandled urgent signal 
If we're sending an urgent signal (i.e. due to unexpected conditions)
and the Process did not setup any signal handler, we should immediately
terminate the Thread, to ensure the current trap frame is preserved for
the impending core dump.
 2021-12-06 19:36:42 +01:00
Andreas Kling 0f9ca51c76 Kernel: Remove unused Inode::preopen_fd() 2021-12-06 19:22:16 +01:00
Ben Wiederhake 0e6e1092f0 Kernel: Make ptrace return an error on error 
Returning 'result.error().code()' erroneously creates an
ErrorOr<FlatPtr> of the positive errno code, which breaks our
error-returning convention.

This seems to be due to a forgotten minus-sign during the refactoring in
9e51e295cf. This latent bug was never
discovered, because currently the error-handling paths are rarely
exercised.
 2021-12-05 22:59:09 +01:00
Ben Wiederhake 0f8483f09c Kernel: Implement new ptrace function PT_PEEKBUF 
This enables the tracer to copy large amounts of data in a much saner
way.
 2021-12-05 22:59:09 +01:00
Ben Wiederhake 3e223185b3 Kernel+strace: Remove unnecessary indirection for PEEK 
Also, remove incomplete, superfluous check.
Incomplete, because only the byte at the provided address was checked;
this misses the last bytes of the "jerk page".
Superfluous, because it is already correctly checked by peek_user_data
(which calls copy_from_user).

The caller/tracer should not typically attempt to read non-userspace
addresses, we don't need to "hot-path" it either.
 2021-12-05 22:59:09 +01:00
Sam Atkins c6a97ea843 Kernel: Mark kernel smart-pointer classes as [[nodiscard]] 
And cast the unused return values to void.
 2021-12-05 15:31:03 +01:00
Sam Atkins 907feb84a0 Kernel: Cast unused smart-pointer return value to void 2021-12-05 15:31:03 +01:00
Idan Horowitz b2464cf4c0 Kernel: Define PT_WRITE_I and PT_WRITE_D 
These are aliases for PT_POKE that are used in some *BSDs.
 2021-12-05 12:53:29 +01:00
Idan Horowitz 265764ff2f Kernel: Add support for the POLLWRBAND poll event 2021-12-05 12:53:29 +01:00
Idan Horowitz f2fef049e1 Kernel: Define the POLLRDNORM alias for POLLIN 
This flag is equivalent to POLLIN.
 2021-12-05 12:53:29 +01:00
Idan Horowitz 05aa764402 Kernel: Define the POLLWRNORM alias for POLLOUT 
This is defined by posix to be equivalent to POLLOUT
 2021-12-05 12:53:29 +01:00
Idan Horowitz 8074157c10 Kernel: Add the IPPROTO_{IGMP, IPIP, RAW} protocol macros 
These are not implemented currently, but are required for some ports to
compile.
 2021-12-05 12:53:29 +01:00
Idan Horowitz 2860637ff3 Kernel: Add the IP_{BLOCK_SOURCE, UNBLOCK_SOURCE, OPTIONS} macros 
These are not implemented currently, but are required for some ports to
compile.
 2021-12-05 12:53:29 +01:00
Idan Horowitz d18b3eb53d Kernel: Add the SO_OOBINLINE SOL_SOCKET-level option macro 
This is not actually implemented, as we don't have any support for
out-of-band right now, but this is required for some ports to compile.
 2021-12-05 12:53:29 +01:00
Idan Horowitz 613ade9dec Kernel: Implement the SO_DONTROUTE SOL_SOCKET-level option 2021-12-05 12:53:29 +01:00
Idan Horowitz 641498954f Kernel: Implement the SO_ACCEPTCONN SOL_SOCKET-level option 2021-12-05 12:53:29 +01:00
Idan Horowitz a0e2fedc20 Kernel: Stub out the SO_DEBUG SOL_SOCKET-level option 2021-12-05 12:53:29 +01:00
Idan Horowitz e521ffd156 Kernel: Add support for the MSG_WAITALL sys$recvmsg flag 2021-12-05 12:53:29 +01:00
Idan Horowitz 5514d60d8d Kernel: Add support for the MSG_DONTROUTE sys$sendmsg flag 2021-12-05 12:53:29 +01:00
Idan Horowitz 0a36d1459a Kernel: Return EINVAL on unsupported LocalSocket ioctl 
ENOTTY is used to signify that no ioctl interface is provided at all,
but LocalSockets do support the FIONREAD ioctl.
 2021-12-05 12:53:29 +01:00
Daniel Bertalan 294cb3cef4 Kernel: Wrap x86 assembly behind ARCH(...) in Syscall.h 
Unlike GCC, Clang parses assembly eagerly, and immediately rejects
inline assembly that's not for the right architecture.
 2021-12-04 11:59:59 -08:00
Daniel Bertalan 9b90f1fed5 Kernel: Do not do integer to pointer conversion in constexpr functions 
Creating pointers from arbitrary values is not a valid thing to do in
constexpr functions. Furthermore, this functions is always called with
runtime values anyways, so there's no use in having it be constexpr.
Instead, make it ALWAYS_INLINE.
 2021-12-04 11:59:59 -08:00
Daniel Bertalan 8e2d0c8d5c Kernel: Do not return a null ref in Processor::current on aarch64 
Clang rejects binding a reference to a null pointer at compile-time.
Let's just crash explicitly, instead of waiting for a null dereference
to mess things up.
 2021-12-04 11:59:59 -08:00
Idan Horowitz 711a7104f3 Kernel: Handle invalid stack pointer during signal dispatch 
Instead of crashing the kernel, we simply terminate the process.
 2021-12-01 21:44:11 +02:00
Idan Horowitz 40f64d7379 Kernel: Dispatch handle-able signals instead of crashing if possible 
This matches the behaviour of the other *nixs and allows processes to
try and recover from such signals in userland.
 2021-12-01 21:44:11 +02:00
Idan Horowitz f415218afe Kernel+LibC: Implement sigaltstack() 
This is required for compiling wine for serenity
 2021-12-01 21:44:11 +02:00
Idan Horowitz d5d0eb45bf Kernel: Clear up some comments in the sys$mprotect implementation 2021-12-01 21:44:11 +02:00
Idan Horowitz f27bbec7b2 Kernel: Move incorrect early return in sys$mprotect 
Since we're iterating over multiple regions that interesect with the
requested range, just one of them having the requested access flags
is not enough to finish the syscall early.
 2021-12-01 21:44:11 +02:00
Idan Horowitz a9e436c4a3 Kernel: Replace usages of SIGSTKFLT with SIGSEGV 
SIGSTKFLT is a signal that signifies a stack fault in a x87 coprocessor,
this signal is not POSIX and also unused by Linux and the BSDs, so let's
use SIGSEGV so programs that setup signal handlers for the common
signals could still handle them in serenity.
 2021-12-01 21:44:11 +02:00
Idan Horowitz 4ca39c7110 Kernel: Move the expand_range_to_page_boundaries helper to MemoryManager 
This helper can (and will) be used in more parts of the kernel besides
the mmap-family of syscalls.
 2021-12-01 21:44:11 +02:00
Idan Horowitz ff6b43734c Kernel: Add Region::clear_to_zero 
This helper method can be used to quickly and efficiently zero out a
region.
 2021-12-01 21:44:11 +02:00
Idan Horowitz 5f95a1a7b7 LibC: Define the MADV_DONTNEED madvise advice macro 
This isn't actually implemented at the moment, but it is required for
wine to compile
 2021-12-01 21:44:11 +02:00
Idan Horowitz fc13d0782f LibC: Make the madvise advice field a value instead of a bitfield 
The advices are almost always exclusive of one another, and while POSIX
does not define madvise, most other unix-like and *BSD systems also only
accept a singular value per call.
 2021-12-01 21:44:11 +02:00
Idan Horowitz 48f92f6482 LibC: Add the SIGFPE si_code macros 2021-12-01 21:44:11 +02:00
James Mintram 224b865fda Kernel: Add an x86 include check+error in x86/TSS.h 2021-12-01 11:22:04 -08:00
James Mintram b08eb37b11 Kernel: Add an x86 include check+error in x86/TrapFrame.h 2021-12-01 11:22:04 -08:00
James Mintram 80cdfee10a Kernel: Add an x86 include check+error in x86/Spinlock.h 2021-12-01 11:22:04 -08:00
James Mintram 34b341e35d Kernel: Add an x86 include check+error in x86/RegisterState.h 2021-12-01 11:22:04 -08:00
James Mintram 1dc1412dee Kernel: Add an x86 include check+error in x86/ProcessorInfo.h 2021-12-01 11:22:04 -08:00
James Mintram e20884dc0c Kernel: Add an x86 include check+error in x86/Processor.h 2021-12-01 11:22:04 -08:00
James Mintram eb33df0c30 Kernel: Add an x86 include check+error in x86/PageFault.h 2021-12-01 11:22:04 -08:00
James Mintram 17fb2adf61 Kernel: Add an x86 include check+error in x86/PageDirectory.h 2021-12-01 11:22:04 -08:00
James Mintram 70a18a2271 Kernel: Add an x86 include check+error in x86/MSR.h 2021-12-01 11:22:04 -08:00
James Mintram bffc3da9d7 Kernel: Add an x86 include check+error in x86/ISRStubs.h 2021-12-01 11:22:04 -08:00
James Mintram 1e5b82f0c6 Kernel: Add an x86 include check+error in x86/IO.h 2021-12-01 11:22:04 -08:00
James Mintram b9ae6daa02 Kernel: Add an x86 include check+error in x86/Inerrupts.h 2021-12-01 11:22:04 -08:00
James Mintram ed2aa96511 Kernel: Add an x86 include check+error in x86/InerruptDisabler.h 2021-12-01 11:22:04 -08:00
James Mintram 62d86afee9 Kernel: Add an x86 include check+error in x86/DescriptorTable.h 2021-12-01 11:22:04 -08:00
James Mintram db1fbdabf9 Kernel: Add an x86 include check+error in x86/CPUID.h 2021-12-01 11:22:04 -08:00