diff options
Diffstat (limited to 'pkg/ring0/entry_amd64.go')
| -rw-r--r-- | pkg/ring0/entry_amd64.go | 98 |
1 files changed, 73 insertions, 25 deletions
diff --git a/pkg/ring0/entry_amd64.go b/pkg/ring0/entry_amd64.go index d87b1fd00..afd646b0b 100644 --- a/pkg/ring0/entry_amd64.go +++ b/pkg/ring0/entry_amd64.go @@ -12,6 +12,7 @@ // See the License for the specific language governing permissions and // limitations under the License. +//go:build amd64 // +build amd64 package ring0 @@ -31,6 +32,13 @@ import ( // executed from kernel mode or not and the appropriate stub is called. func sysenter() +// addrOfSysenter returns the start address of sysenter. +// +// In Go 1.17+, Go references to assembly functions resolve to an ABIInternal +// wrapper function rather than the function itself. We must reference from +// assembly to get the ABI0 (i.e., primary) address. +func addrOfSysenter() uintptr + // swapgs swaps the current GS value. // // This must be called prior to sysret/iret. @@ -39,6 +47,9 @@ func swapgs() // jumpToKernel jumps to the kernel version of the current RIP. func jumpToKernel() +// jumpToUser jumps to the user version of the current RIP. +func jumpToUser() + // sysret returns to userspace from a system call. // // The return code is the vector that interrupted execution. @@ -65,7 +76,12 @@ func exception() // This is used when processing kernel exceptions and syscalls. func resume() -// Start is the CPU entrypoint. +// start is the CPU entrypoint. +// +// See requirements below. +func start() + +// AddrOfStart return the address of the CPU entrypoint. // // The following start conditions must be satisfied: // @@ -78,7 +94,11 @@ func resume() // * c.EFER() should be the current EFER value. // // The CPU state will be set to c.Registers(). -func Start() +// +// In Go 1.17+, Go references to assembly functions resolve to an ABIInternal +// wrapper function rather than the function itself. We must reference from +// assembly to get the ABI0 (i.e., primary) address. +func AddrOfStart() uintptr // Exception stubs. func divideByZero() @@ -104,28 +124,56 @@ func virtualizationException() func securityException() func syscallInt80() +// These returns the start address of the functions above. +// +// In Go 1.17+, Go references to assembly functions resolve to an ABIInternal +// wrapper function rather than the function itself. We must reference from +// assembly to get the ABI0 (i.e., primary) address. +func addrOfDivideByZero() uintptr +func addrOfDebug() uintptr +func addrOfNMI() uintptr +func addrOfBreakpoint() uintptr +func addrOfOverflow() uintptr +func addrOfBoundRangeExceeded() uintptr +func addrOfInvalidOpcode() uintptr +func addrOfDeviceNotAvailable() uintptr +func addrOfDoubleFault() uintptr +func addrOfCoprocessorSegmentOverrun() uintptr +func addrOfInvalidTSS() uintptr +func addrOfSegmentNotPresent() uintptr +func addrOfStackSegmentFault() uintptr +func addrOfGeneralProtectionFault() uintptr +func addrOfPageFault() uintptr +func addrOfX87FloatingPointException() uintptr +func addrOfAlignmentCheck() uintptr +func addrOfMachineCheck() uintptr +func addrOfSimdFloatingPointException() uintptr +func addrOfVirtualizationException() uintptr +func addrOfSecurityException() uintptr +func addrOfSyscallInt80() uintptr + // Exception handler index. -var handlers = map[Vector]func(){ - DivideByZero: divideByZero, - Debug: debug, - NMI: nmi, - Breakpoint: breakpoint, - Overflow: overflow, - BoundRangeExceeded: boundRangeExceeded, - InvalidOpcode: invalidOpcode, - DeviceNotAvailable: deviceNotAvailable, - DoubleFault: doubleFault, - CoprocessorSegmentOverrun: coprocessorSegmentOverrun, - InvalidTSS: invalidTSS, - SegmentNotPresent: segmentNotPresent, - StackSegmentFault: stackSegmentFault, - GeneralProtectionFault: generalProtectionFault, - PageFault: pageFault, - X87FloatingPointException: x87FloatingPointException, - AlignmentCheck: alignmentCheck, - MachineCheck: machineCheck, - SIMDFloatingPointException: simdFloatingPointException, - VirtualizationException: virtualizationException, - SecurityException: securityException, - SyscallInt80: syscallInt80, +var handlers = map[Vector]uintptr{ + DivideByZero: addrOfDivideByZero(), + Debug: addrOfDebug(), + NMI: addrOfNMI(), + Breakpoint: addrOfBreakpoint(), + Overflow: addrOfOverflow(), + BoundRangeExceeded: addrOfBoundRangeExceeded(), + InvalidOpcode: addrOfInvalidOpcode(), + DeviceNotAvailable: addrOfDeviceNotAvailable(), + DoubleFault: addrOfDoubleFault(), + CoprocessorSegmentOverrun: addrOfCoprocessorSegmentOverrun(), + InvalidTSS: addrOfInvalidTSS(), + SegmentNotPresent: addrOfSegmentNotPresent(), + StackSegmentFault: addrOfStackSegmentFault(), + GeneralProtectionFault: addrOfGeneralProtectionFault(), + PageFault: addrOfPageFault(), + X87FloatingPointException: addrOfX87FloatingPointException(), + AlignmentCheck: addrOfAlignmentCheck(), + MachineCheck: addrOfMachineCheck(), + SIMDFloatingPointException: addrOfSimdFloatingPointException(), + VirtualizationException: addrOfVirtualizationException(), + SecurityException: addrOfSecurityException(), + SyscallInt80: addrOfSyscallInt80(), } |