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Kernel: Add /proc/kernel_base (superuser only)

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This file contains the kernel base address as a decimal integer.
This commit is contained in:
Andreas Kling 2021-07-22 14:18:36 +02:00
parent 0642f8f2c6
commit 6115258a5c
1 changed files with 29 additions and 0 deletions
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29
Kernel/GlobalProcessExposed.cpp
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@ -707,6 +707,24 @@ private:
} }
}; };
class ProcFSKernelBase final : public ProcFSGlobalInformation {
public:
static NonnullRefPtr<ProcFSKernelBase> must_create();
private:
ProcFSKernelBase();
virtual mode_t required_mode() const override { return 0400; }
virtual bool output(KBufferBuilder& builder) override
{
if (!Process::current()->is_superuser())
return false;
builder.append(String::number(kernel_base));
return true;
}
};
UNMAP_AFTER_INIT NonnullRefPtr<ProcFSSelfProcessDirectory> ProcFSSelfProcessDirectory::must_create() UNMAP_AFTER_INIT NonnullRefPtr<ProcFSSelfProcessDirectory> ProcFSSelfProcessDirectory::must_create()
{ {
return adopt_ref_if_nonnull(new (nothrow) ProcFSSelfProcessDirectory()).release_nonnull(); return adopt_ref_if_nonnull(new (nothrow) ProcFSSelfProcessDirectory()).release_nonnull();
@ -764,6 +782,11 @@ UNMAP_AFTER_INIT NonnullRefPtr<ProcFSProfile> ProcFSProfile::must_create()
return adopt_ref_if_nonnull(new (nothrow) ProcFSProfile).release_nonnull(); return adopt_ref_if_nonnull(new (nothrow) ProcFSProfile).release_nonnull();
} }
UNMAP_AFTER_INIT NonnullRefPtr<ProcFSKernelBase> ProcFSKernelBase::must_create()
{
return adopt_ref_if_nonnull(new (nothrow) ProcFSKernelBase).release_nonnull();
}
UNMAP_AFTER_INIT ProcFSSelfProcessDirectory::ProcFSSelfProcessDirectory() UNMAP_AFTER_INIT ProcFSSelfProcessDirectory::ProcFSSelfProcessDirectory()
: ProcFSExposedLink("self"sv) : ProcFSExposedLink("self"sv)
{ {
@ -821,6 +844,11 @@ UNMAP_AFTER_INIT ProcFSProfile::ProcFSProfile()
{ {
} }
UNMAP_AFTER_INIT ProcFSKernelBase::ProcFSKernelBase()
: ProcFSGlobalInformation("kernel_base"sv)
{
}
UNMAP_AFTER_INIT NonnullRefPtr<ProcFSSystemDirectory> ProcFSSystemDirectory::must_create(const ProcFSRootDirectory& parent_directory) UNMAP_AFTER_INIT NonnullRefPtr<ProcFSSystemDirectory> ProcFSSystemDirectory::must_create(const ProcFSRootDirectory& parent_directory)
{ {
auto directory = adopt_ref(*new (nothrow) ProcFSSystemDirectory(parent_directory)); auto directory = adopt_ref(*new (nothrow) ProcFSSystemDirectory(parent_directory));
@ -852,6 +880,7 @@ UNMAP_AFTER_INIT NonnullRefPtr<ProcFSRootDirectory> ProcFSRootDirectory::must_cr
directory->m_components.append(ProcFSCommandLine::must_create()); directory->m_components.append(ProcFSCommandLine::must_create());
directory->m_components.append(ProcFSModules::must_create()); directory->m_components.append(ProcFSModules::must_create());
directory->m_components.append(ProcFSProfile::must_create()); directory->m_components.append(ProcFSProfile::must_create());
directory->m_components.append(ProcFSKernelBase::must_create());
directory->m_components.append(ProcFSNetworkDirectory::must_create(*directory)); directory->m_components.append(ProcFSNetworkDirectory::must_create(*directory));
directory->m_components.append(ProcFSSystemDirectory::must_create(*directory)); directory->m_components.append(ProcFSSystemDirectory::must_create(*directory));