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Diffstat (limited to 'pkg/ring0/defs.go')
| -rw-r--r-- | pkg/ring0/defs.go | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/pkg/ring0/defs.go b/pkg/ring0/defs.go deleted file mode 100644 index 38ce9be1e..000000000 --- a/pkg/ring0/defs.go +++ /dev/null @@ -1,125 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package ring0 - -import ( - "gvisor.dev/gvisor/pkg/ring0/pagetables" - "gvisor.dev/gvisor/pkg/sentry/arch" - "gvisor.dev/gvisor/pkg/sentry/arch/fpu" -) - -// Kernel is a global kernel object. -// -// This contains global state, shared by multiple CPUs. -type Kernel struct { - // PageTables are the kernel pagetables; this must be provided. - PageTables *pagetables.PageTables - - KernelArchState -} - -// Hooks are hooks for kernel functions. -type Hooks interface { - // KernelSyscall is called for kernel system calls. - // - // Return from this call will restore registers and return to the kernel: the - // registers must be modified directly. - // - // If this function is not provided, a kernel exception results in halt. - // - // This must be go:nosplit, as this will be on the interrupt stack. - // Closures are permitted, as the pointer to the closure frame is not - // passed on the stack. - KernelSyscall() - - // KernelException handles an exception during kernel execution. - // - // Return from this call will restore registers and return to the kernel: the - // registers must be modified directly. - // - // If this function is not provided, a kernel exception results in halt. - // - // This must be go:nosplit, as this will be on the interrupt stack. - // Closures are permitted, as the pointer to the closure frame is not - // passed on the stack. - KernelException(Vector) -} - -// CPU is the per-CPU struct. -type CPU struct { - // self is a self reference. - // - // This is always guaranteed to be at offset zero. - self *CPU - - // kernel is reference to the kernel that this CPU was initialized - // with. This reference is kept for garbage collection purposes: CPU - // registers may refer to objects within the Kernel object that cannot - // be safely freed. - kernel *Kernel - - // CPUArchState is architecture-specific state. - CPUArchState - - // registers is a set of registers; these may be used on kernel system - // calls and exceptions via the Registers function. - registers arch.Registers - - // floatingPointState holds floating point state. - floatingPointState fpu.State - - // hooks are kernel hooks. - hooks Hooks -} - -// Registers returns a modifiable-copy of the kernel registers. -// -// This is explicitly safe to call during KernelException and KernelSyscall. -// -//go:nosplit -func (c *CPU) Registers() *arch.Registers { - return &c.registers -} - -// FloatingPointState returns the kernel floating point state. -// -// This is explicitly safe to call during KernelException and KernelSyscall. -// -//go:nosplit -func (c *CPU) FloatingPointState() *fpu.State { - return &c.floatingPointState -} - -// SwitchOpts are passed to the Switch function. -type SwitchOpts struct { - // Registers are the user register state. - Registers *arch.Registers - - // FloatingPointState is a byte pointer where floating point state is - // saved and restored. - FloatingPointState *fpu.State - - // PageTables are the application page tables. - PageTables *pagetables.PageTables - - // Flush indicates that a TLB flush should be forced on switch. - Flush bool - - // FullRestore indicates that an iret-based restore should be used. - FullRestore bool - - // SwitchArchOpts are architecture-specific options. - SwitchArchOpts -} |