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Kernel: Fix the return type for syscalls

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The Process::Handler type has KResultOr<FlatPtr> as its return type.
Using a different return type with an equally-sized template parameter
sort of works but breaks once that condition is no longer true, e.g.
for KResultOr<int> on x86_64.

Ideally the syscall handlers would also take FlatPtrs as their args
so we can get rid of the reinterpret_cast for the function pointer
but I didn't quite feel like cleaning that up as well.
This commit is contained in:
Gunnar Beutner 2021-06-28 20:59:35 +02:00 • committed by Andreas Kling
parent b6435372cc
commit 2a78bf8596
71 changed files with 313 additions and 301 deletions
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4
Kernel/Syscalls/read.cpp
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@ -12,7 +12,7 @@ namespace Kernel {
using BlockFlags = Thread::FileBlocker::BlockFlags;
KResultOr<size_t> Process::sys$readv(int fd, Userspace<const struct iovec*> iov, int iov_count)
KResultOr<FlatPtr> Process::sys$readv(int fd, Userspace<const struct iovec*> iov, int iov_count)
{
REQUIRE_PROMISE(stdio);
if (iov_count < 0)
@ -68,7 +68,7 @@ KResultOr<size_t> Process::sys$readv(int fd, Userspace<const struct iovec*> iov,
return nread;
}
KResultOr<size_t> Process::sys$read(int fd, Userspace<u8*> buffer, size_t size)
KResultOr<FlatPtr> Process::sys$read(int fd, Userspace<u8*> buffer, size_t size)
{
REQUIRE_PROMISE(stdio);
if (size == 0)