Add `struct sigaction64` and `sigaction64`.
Bug: http://b/72493232
Test: ran tests
Change-Id: I47b0560a30aa33a9b1f1978dfb7f84d2e3d389b8
diff --git a/libc/bionic/sigaction.cpp b/libc/bionic/sigaction.cpp
index 0633748..e5a7d5f 100644
--- a/libc/bionic/sigaction.cpp
+++ b/libc/bionic/sigaction.cpp
@@ -27,6 +27,7 @@
*/
#include <signal.h>
+#include <string.h>
extern "C" void __restore_rt(void);
extern "C" void __restore(void);
@@ -75,28 +76,49 @@
return result;
}
+__strong_alias(sigaction64, sigaction);
+
#else
+extern "C" int __rt_sigaction(int, const struct sigaction64*, struct sigaction64*, size_t);
extern "C" int __sigaction(int, const struct sigaction*, struct sigaction*);
-int sigaction(int signal, const struct sigaction* bionic_new_action, struct sigaction* bionic_old_action) {
+int sigaction(int signal, const struct sigaction* bionic_new, struct sigaction* bionic_old) {
// The 32-bit ABI is broken. struct sigaction includes a too-small sigset_t,
- // so we have to use sigaction(2) rather than rt_sigaction(2).
- struct sigaction kernel_new_action;
- if (bionic_new_action != NULL) {
- kernel_new_action.sa_flags = bionic_new_action->sa_flags;
- kernel_new_action.sa_handler = bionic_new_action->sa_handler;
- kernel_new_action.sa_mask = bionic_new_action->sa_mask;
-#if defined(SA_RESTORER)
- kernel_new_action.sa_restorer = bionic_new_action->sa_restorer;
-
- if (!(kernel_new_action.sa_flags & SA_RESTORER)) {
- kernel_new_action.sa_flags |= SA_RESTORER;
- kernel_new_action.sa_restorer = (kernel_new_action.sa_flags & SA_SIGINFO) ? &__restore_rt : &__restore;
- }
-#endif
+ // so we have to translate to struct sigaction64 first.
+ struct sigaction64 kernel_new;
+ if (bionic_new) {
+ kernel_new = {};
+ kernel_new.sa_flags = bionic_new->sa_flags;
+ kernel_new.sa_handler = bionic_new->sa_handler;
+ memcpy(&kernel_new.sa_mask, &bionic_new->sa_mask, sizeof(bionic_new->sa_mask));
}
- return __sigaction(signal, (bionic_new_action != NULL) ? &kernel_new_action : NULL, bionic_old_action);
+
+ struct sigaction64 kernel_old;
+ int result = sigaction64(signal, bionic_new ? &kernel_new : nullptr, &kernel_old);
+ if (bionic_old) {
+ *bionic_old = {};
+ bionic_old->sa_flags = kernel_old.sa_flags;
+ bionic_old->sa_handler = kernel_old.sa_handler;
+ memcpy(&bionic_old->sa_mask, &kernel_old.sa_mask, sizeof(bionic_old->sa_mask));
+ }
+ return result;
+}
+
+int sigaction64(int signal, const struct sigaction64* bionic_new, struct sigaction64* bionic_old) {
+ struct sigaction64 kernel_new;
+ if (bionic_new) {
+ kernel_new = *bionic_new;
+ if (!(kernel_new.sa_flags & SA_RESTORER)) {
+ kernel_new.sa_flags |= SA_RESTORER;
+ kernel_new.sa_restorer = (kernel_new.sa_flags & SA_SIGINFO) ? &__restore_rt : &__restore;
+ }
+ }
+
+ return __rt_sigaction(signal,
+ bionic_new ? &kernel_new : nullptr,
+ bionic_old,
+ sizeof(kernel_new.sa_mask));
}
#endif