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Diffstat (limited to 'pkg/sentry/kernel/task_signals.go')
-rw-r--r--pkg/sentry/kernel/task_signals.go51
1 files changed, 15 insertions, 36 deletions
diff --git a/pkg/sentry/kernel/task_signals.go b/pkg/sentry/kernel/task_signals.go
index c2b9fc08f..466256fe4 100644
--- a/pkg/sentry/kernel/task_signals.go
+++ b/pkg/sentry/kernel/task_signals.go
@@ -86,7 +86,7 @@ var defaultActions = map[linux.Signal]SignalAction{
}
// computeAction figures out what to do given a signal number
-// and an arch.SignalAct. SIGSTOP always results in a SignalActionStop,
+// and an linux.SigAction. SIGSTOP always results in a SignalActionStop,
// and SIGKILL always results in a SignalActionTerm.
// Signal 0 is always ignored as many programs use it for various internal functions
// and don't expect it to do anything.
@@ -97,7 +97,7 @@ var defaultActions = map[linux.Signal]SignalAction{
// 0, the default action is taken;
// 1, the signal is ignored;
// anything else, the function returns SignalActionHandler.
-func computeAction(sig linux.Signal, act arch.SignalAct) SignalAction {
+func computeAction(sig linux.Signal, act linux.SigAction) SignalAction {
switch sig {
case linux.SIGSTOP:
return SignalActionStop
@@ -108,9 +108,9 @@ func computeAction(sig linux.Signal, act arch.SignalAct) SignalAction {
}
switch act.Handler {
- case arch.SignalActDefault:
+ case linux.SIG_DFL:
return defaultActions[sig]
- case arch.SignalActIgnore:
+ case linux.SIG_IGN:
return SignalActionIgnore
default:
return SignalActionHandler
@@ -155,7 +155,7 @@ func (t *Task) PendingSignals() linux.SignalSet {
}
// deliverSignal delivers the given signal and returns the following run state.
-func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunState {
+func (t *Task) deliverSignal(info *arch.SignalInfo, act linux.SigAction) taskRunState {
sigact := computeAction(linux.Signal(info.Signo), act)
if t.haveSyscallReturn {
@@ -172,7 +172,7 @@ func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunS
fallthrough
case sre == syserror.ERESTART_RESTARTBLOCK:
fallthrough
- case (sre == syserror.ERESTARTSYS && !act.IsRestart()):
+ case (sre == syserror.ERESTARTSYS && act.Flags&linux.SA_RESTART == 0):
t.Debugf("Not restarting syscall %d after errno %d: interrupted by signal %d", t.Arch().SyscallNo(), sre, info.Signo)
t.Arch().SetReturn(uintptr(-ExtractErrno(syserror.EINTR, -1)))
default:
@@ -236,7 +236,7 @@ func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunS
// deliverSignalToHandler changes the task's userspace state to enter the given
// user-configured handler for the given signal.
-func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act arch.SignalAct) error {
+func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act linux.SigAction) error {
// Signal delivery to an application handler interrupts restartable
// sequences.
t.rseqInterrupt()
@@ -248,7 +248,7 @@ func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act arch.SignalAct)
// N.B. This is a *copy* of the alternate stack that the user's signal
// handler expects to see in its ucontext (even if it's not in use).
alt := t.signalStack
- if act.IsOnStack() && alt.IsEnabled() {
+ if act.Flags&linux.SA_ONSTACK != 0 && alt.IsEnabled() {
alt.SetOnStack()
if !alt.Contains(sp) {
sp = hostarch.Addr(alt.Top())
@@ -289,7 +289,7 @@ func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act arch.SignalAct)
// Add our signal mask.
newMask := t.signalMask | act.Mask
- if !act.IsNoDefer() {
+ if act.Flags&linux.SA_NODEFER == 0 {
newMask |= linux.SignalSetOf(linux.Signal(info.Signo))
}
t.SetSignalMask(newMask)
@@ -572,9 +572,9 @@ func (t *Task) forceSignal(sig linux.Signal, unconditional bool) {
func (t *Task) forceSignalLocked(sig linux.Signal, unconditional bool) {
blocked := linux.SignalSetOf(sig)&t.signalMask != 0
act := t.tg.signalHandlers.actions[sig]
- ignored := act.Handler == arch.SignalActIgnore
+ ignored := act.Handler == linux.SIG_IGN
if blocked || ignored || unconditional {
- act.Handler = arch.SignalActDefault
+ act.Handler = linux.SIG_DFL
t.tg.signalHandlers.actions[sig] = act
if blocked {
t.setSignalMaskLocked(t.signalMask &^ linux.SignalSetOf(sig))
@@ -680,11 +680,11 @@ func (t *Task) SetSignalStack(alt arch.SignalStack) bool {
return true
}
-// SetSignalAct atomically sets the thread group's signal action for signal sig
+// SetSigAction atomically sets the thread group's signal action for signal sig
// to *actptr (if actptr is not nil) and returns the old signal action.
-func (tg *ThreadGroup) SetSignalAct(sig linux.Signal, actptr *arch.SignalAct) (arch.SignalAct, error) {
+func (tg *ThreadGroup) SetSigAction(sig linux.Signal, actptr *linux.SigAction) (linux.SigAction, error) {
if !sig.IsValid() {
- return arch.SignalAct{}, syserror.EINVAL
+ return linux.SigAction{}, syserror.EINVAL
}
tg.pidns.owner.mu.RLock()
@@ -718,27 +718,6 @@ func (tg *ThreadGroup) SetSignalAct(sig linux.Signal, actptr *arch.SignalAct) (a
return oldact, nil
}
-// CopyOutSignalAct converts the given SignalAct into an architecture-specific
-// type and then copies it out to task memory.
-func (t *Task) CopyOutSignalAct(addr hostarch.Addr, s *arch.SignalAct) error {
- n := t.Arch().NewSignalAct()
- n.SerializeFrom(s)
- _, err := n.CopyOut(t, addr)
- return err
-}
-
-// CopyInSignalAct copies an architecture-specific sigaction type from task
-// memory and then converts it into a SignalAct.
-func (t *Task) CopyInSignalAct(addr hostarch.Addr) (arch.SignalAct, error) {
- n := t.Arch().NewSignalAct()
- var s arch.SignalAct
- if _, err := n.CopyIn(t, addr); err != nil {
- return s, err
- }
- n.DeserializeTo(&s)
- return s, nil
-}
-
// CopyOutSignalStack converts the given SignalStack into an
// architecture-specific type and then copies it out to task memory.
func (t *Task) CopyOutSignalStack(addr hostarch.Addr, s *arch.SignalStack) error {
@@ -909,7 +888,7 @@ func (t *Task) signalStop(target *Task, code int32, status int32) {
t.tg.signalHandlers.mu.Lock()
defer t.tg.signalHandlers.mu.Unlock()
act, ok := t.tg.signalHandlers.actions[linux.SIGCHLD]
- if !ok || (act.Handler != arch.SignalActIgnore && act.Flags&arch.SignalFlagNoCldStop == 0) {
+ if !ok || (act.Handler != linux.SIG_IGN && act.Flags&linux.SA_NOCLDSTOP == 0) {
sigchld := &arch.SignalInfo{
Signo: int32(linux.SIGCHLD),
Code: code,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 10:17:48 +0000