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Kernel: Make all syscall functions return KResultOr<T>

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This makes it a lot easier to return errors since we no longer have to
worry about negating EFOO errors and can just return them flat.
This commit is contained in:
Andreas Kling 2021-03-01 13:49:16 +01:00
parent 9af1e1a3bf
commit ac71775de5
70 changed files with 747 additions and 742 deletions
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8
Kernel/Syscalls/debug.cpp
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@ -31,26 +31,26 @@
namespace Kernel {
int Process::sys$dump_backtrace()
KResultOr<int> Process::sys$dump_backtrace()
{
dump_backtrace();
return 0;
}
int Process::sys$dbgputch(u8 ch)
KResultOr<int> Process::sys$dbgputch(u8 ch)
{
IO::out8(0xe9, ch);
return 0;
}
int Process::sys$dbgputstr(Userspace<const u8*> characters, int length)
KResultOr<int> Process::sys$dbgputstr(Userspace<const u8*> characters, int length)
{
if (length <= 0)
return 0;
auto buffer = UserOrKernelBuffer::for_user_buffer(characters, length);
if (!buffer.has_value())
return -EFAULT;
return EFAULT;
ssize_t nread = buffer.value().read_buffered<1024>(length, [&](const u8* buffer, size_t buffer_size) {
for (size_t i = 0; i < buffer_size; ++i)
IO::out8(0xe9, buffer[i]);