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Kernel: Make syscalls that take a buffer size use ssize_t instead of size_t.

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Dealing with the unsigned overflow propagation here just seems unreasonably
error prone. Let's limit ourselves to 2GB buffer sizes instead.
This commit is contained in:
Andreas Kling 2019-02-25 21:19:57 +01:00
parent 5af4e622b9
commit beda478821
40 changed files with 144 additions and 136 deletions
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10
Kernel/ZeroDevice.cpp
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@ -17,15 +17,15 @@ bool ZeroDevice::can_read(Process&) const
return true;
}
ssize_t ZeroDevice::read(Process&, byte* buffer, size_t bufferSize)
ssize_t ZeroDevice::read(Process&, byte* buffer, ssize_t size)
{
size_t count = min(GoodBufferSize, bufferSize);
memset(buffer, 0, count);
ssize_t count = min(GoodBufferSize, size);
memset(buffer, 0, (size_t)count);
return count;
}
ssize_t ZeroDevice::write(Process&, const byte*, size_t bufferSize)
ssize_t ZeroDevice::write(Process&, const byte*, ssize_t size)
{
return min(GoodBufferSize, bufferSize);
return min(GoodBufferSize, size);
}