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-rw-r--r--pkg/sentry/arch/arch_aarch64.go23
-rw-r--r--pkg/sentry/arch/arch_amd64.go4
-rw-r--r--pkg/sentry/arch/arch_arm64.go4
-rw-r--r--pkg/sentry/arch/arch_x86.go16
-rw-r--r--pkg/sentry/platform/ring0/kernel_arm64.go6
5 files changed, 33 insertions, 20 deletions
diff --git a/pkg/sentry/arch/arch_aarch64.go b/pkg/sentry/arch/arch_aarch64.go
index daba8b172..fd95eb2d2 100644
--- a/pkg/sentry/arch/arch_aarch64.go
+++ b/pkg/sentry/arch/arch_aarch64.go
@@ -28,7 +28,14 @@ import (
)
// Registers represents the CPU registers for this architecture.
-type Registers = linux.PtraceRegs
+//
+// +stateify savable
+type Registers struct {
+ linux.PtraceRegs
+
+ // TPIDR_EL0 is the EL0 Read/Write Software Thread ID Register.
+ TPIDR_EL0 uint64
+}
const (
// SyscallWidth is the width of insturctions.
@@ -101,9 +108,6 @@ type State struct {
// Our floating point state.
aarch64FPState `state:"wait"`
- // TLS pointer
- TPValue uint64
-
// FeatureSet is a pointer to the currently active feature set.
FeatureSet *cpuid.FeatureSet
@@ -157,7 +161,6 @@ func (s *State) Fork() State {
return State{
Regs: s.Regs,
aarch64FPState: s.aarch64FPState.fork(),
- TPValue: s.TPValue,
FeatureSet: s.FeatureSet,
OrigR0: s.OrigR0,
}
@@ -241,18 +244,18 @@ func (s *State) ptraceGetRegs() Registers {
return s.Regs
}
-var registersSize = (*Registers)(nil).SizeBytes()
+var ptraceRegistersSize = (*linux.PtraceRegs)(nil).SizeBytes()
// PtraceSetRegs implements Context.PtraceSetRegs.
func (s *State) PtraceSetRegs(src io.Reader) (int, error) {
var regs Registers
- buf := make([]byte, registersSize)
+ buf := make([]byte, ptraceRegistersSize)
if _, err := io.ReadFull(src, buf); err != nil {
return 0, err
}
regs.UnmarshalUnsafe(buf)
s.Regs = regs
- return registersSize, nil
+ return ptraceRegistersSize, nil
}
// PtraceGetFPRegs implements Context.PtraceGetFPRegs.
@@ -278,7 +281,7 @@ const (
func (s *State) PtraceGetRegSet(regset uintptr, dst io.Writer, maxlen int) (int, error) {
switch regset {
case _NT_PRSTATUS:
- if maxlen < registersSize {
+ if maxlen < ptraceRegistersSize {
return 0, syserror.EFAULT
}
return s.PtraceGetRegs(dst)
@@ -291,7 +294,7 @@ func (s *State) PtraceGetRegSet(regset uintptr, dst io.Writer, maxlen int) (int,
func (s *State) PtraceSetRegSet(regset uintptr, src io.Reader, maxlen int) (int, error) {
switch regset {
case _NT_PRSTATUS:
- if maxlen < registersSize {
+ if maxlen < ptraceRegistersSize {
return 0, syserror.EFAULT
}
return s.PtraceSetRegs(src)
diff --git a/pkg/sentry/arch/arch_amd64.go b/pkg/sentry/arch/arch_amd64.go
index 3b3a0a272..1c3e3c14c 100644
--- a/pkg/sentry/arch/arch_amd64.go
+++ b/pkg/sentry/arch/arch_amd64.go
@@ -300,7 +300,7 @@ func (c *context64) PtracePeekUser(addr uintptr) (interface{}, error) {
// PTRACE_PEEKUSER and PTRACE_POKEUSER are only effective on regs and
// u_debugreg, returning 0 or silently no-oping for other fields
// respectively.
- if addr < uintptr(registersSize) {
+ if addr < uintptr(ptraceRegistersSize) {
regs := c.ptraceGetRegs()
buf := make([]byte, regs.SizeBytes())
regs.MarshalUnsafe(buf)
@@ -315,7 +315,7 @@ func (c *context64) PtracePokeUser(addr, data uintptr) error {
if addr&7 != 0 || addr >= userStructSize {
return syscall.EIO
}
- if addr < uintptr(registersSize) {
+ if addr < uintptr(ptraceRegistersSize) {
regs := c.ptraceGetRegs()
buf := make([]byte, regs.SizeBytes())
regs.MarshalUnsafe(buf)
diff --git a/pkg/sentry/arch/arch_arm64.go b/pkg/sentry/arch/arch_arm64.go
index ada7ac7b8..cabbf60e0 100644
--- a/pkg/sentry/arch/arch_arm64.go
+++ b/pkg/sentry/arch/arch_arm64.go
@@ -142,7 +142,7 @@ func (c *context64) SetStack(value uintptr) {
// TLS returns the current TLS pointer.
func (c *context64) TLS() uintptr {
- return uintptr(c.TPValue)
+ return uintptr(c.Regs.TPIDR_EL0)
}
// SetTLS sets the current TLS pointer. Returns false if value is invalid.
@@ -151,7 +151,7 @@ func (c *context64) SetTLS(value uintptr) bool {
return false
}
- c.TPValue = uint64(value)
+ c.Regs.TPIDR_EL0 = uint64(value)
return true
}
diff --git a/pkg/sentry/arch/arch_x86.go b/pkg/sentry/arch/arch_x86.go
index dc458b37f..b9405b320 100644
--- a/pkg/sentry/arch/arch_x86.go
+++ b/pkg/sentry/arch/arch_x86.go
@@ -31,7 +31,11 @@ import (
)
// Registers represents the CPU registers for this architecture.
-type Registers = linux.PtraceRegs
+//
+// +stateify savable
+type Registers struct {
+ linux.PtraceRegs
+}
// System-related constants for x86.
const (
@@ -311,12 +315,12 @@ func (s *State) ptraceGetRegs() Registers {
return regs
}
-var registersSize = (*Registers)(nil).SizeBytes()
+var ptraceRegistersSize = (*linux.PtraceRegs)(nil).SizeBytes()
// PtraceSetRegs implements Context.PtraceSetRegs.
func (s *State) PtraceSetRegs(src io.Reader) (int, error) {
var regs Registers
- buf := make([]byte, registersSize)
+ buf := make([]byte, ptraceRegistersSize)
if _, err := io.ReadFull(src, buf); err != nil {
return 0, err
}
@@ -374,7 +378,7 @@ func (s *State) PtraceSetRegs(src io.Reader) (int, error) {
}
regs.Eflags = (s.Regs.Eflags &^ eflagsPtraceMutable) | (regs.Eflags & eflagsPtraceMutable)
s.Regs = regs
- return registersSize, nil
+ return ptraceRegistersSize, nil
}
// isUserSegmentSelector returns true if the given segment selector specifies a
@@ -543,7 +547,7 @@ const (
func (s *State) PtraceGetRegSet(regset uintptr, dst io.Writer, maxlen int) (int, error) {
switch regset {
case _NT_PRSTATUS:
- if maxlen < registersSize {
+ if maxlen < ptraceRegistersSize {
return 0, syserror.EFAULT
}
return s.PtraceGetRegs(dst)
@@ -563,7 +567,7 @@ func (s *State) PtraceGetRegSet(regset uintptr, dst io.Writer, maxlen int) (int,
func (s *State) PtraceSetRegSet(regset uintptr, src io.Reader, maxlen int) (int, error) {
switch regset {
case _NT_PRSTATUS:
- if maxlen < registersSize {
+ if maxlen < ptraceRegistersSize {
return 0, syserror.EFAULT
}
return s.PtraceSetRegs(src)
diff --git a/pkg/sentry/platform/ring0/kernel_arm64.go b/pkg/sentry/platform/ring0/kernel_arm64.go
index ccacaea6b..fca3a5478 100644
--- a/pkg/sentry/platform/ring0/kernel_arm64.go
+++ b/pkg/sentry/platform/ring0/kernel_arm64.go
@@ -58,7 +58,13 @@ func (c *CPU) SwitchToUser(switchOpts SwitchOpts) (vector Vector) {
regs.Pstate &= ^uint64(UserFlagsClear)
regs.Pstate |= UserFlagsSet
+
+ SetTLS(regs.TPIDR_EL0)
+
kernelExitToEl0()
+
+ regs.TPIDR_EL0 = GetTLS()
+
vector = c.vecCode
// Perform the switch.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 17:29:10 +0000