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Kernel+LibC: Pass 64-bit integers in syscalls by value
Now that support for 32-bit x86 has been removed, we don't have to worry about the top half of `off_t`/`u64` values being chopped off when we try to pass them in registers. Therefore, we no longer need the workaround of pointers to stack-allocated values to syscalls. Note that this changes the system call ABI, so statically linked programs will have to be re-linked.
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12 changed files with 22 additions and 37 deletions
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@ -13,16 +13,14 @@
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namespace Kernel {
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html
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ErrorOr<FlatPtr> Process::sys$posix_fallocate(int fd, Userspace<off_t const*> userspace_offset, Userspace<off_t const*> userspace_length)
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ErrorOr<FlatPtr> Process::sys$posix_fallocate(int fd, off_t offset, off_t length)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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// [EINVAL] The len argument is less than zero, or the offset argument is less than zero, or the underlying file system does not support this operation.
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auto offset = TRY(copy_typed_from_user(userspace_offset));
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if (offset < 0)
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return EINVAL;
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auto length = TRY(copy_typed_from_user(userspace_length));
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if (length <= 0)
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return EINVAL;
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