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-rw-r--r--util/oslib-posix.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index f63146407f..cd686aae3d 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -603,3 +603,36 @@ void qemu_free_stack(void *stack, size_t sz)
munmap(stack, sz);
}
+
+void sigaction_invoke(struct sigaction *action,
+ struct qemu_signalfd_siginfo *info)
+{
+ siginfo_t si = { 0 };
+ si.si_signo = info->ssi_signo;
+ si.si_errno = info->ssi_errno;
+ si.si_code = info->ssi_code;
+
+ /* Convert the minimal set of fields defined by POSIX.
+ * Positive si_code values are reserved for kernel-generated
+ * signals, where the valid siginfo fields are determined by
+ * the signal number. But according to POSIX, it is unspecified
+ * whether SI_USER and SI_QUEUE have values less than or equal to
+ * zero.
+ */
+ if (info->ssi_code == SI_USER || info->ssi_code == SI_QUEUE ||
+ info->ssi_code <= 0) {
+ /* SIGTERM, etc. */
+ si.si_pid = info->ssi_pid;
+ si.si_uid = info->ssi_uid;
+ } else if (info->ssi_signo == SIGILL || info->ssi_signo == SIGFPE ||
+ info->ssi_signo == SIGSEGV || info->ssi_signo == SIGBUS) {
+ si.si_addr = (void *)(uintptr_t)info->ssi_addr;
+ } else if (info->ssi_signo == SIGCHLD) {
+ si.si_pid = info->ssi_pid;
+ si.si_status = info->ssi_status;
+ si.si_uid = info->ssi_uid;
+ } else if (info->ssi_signo == SIGIO) {
+ si.si_band = info->ssi_band;
+ }
+ action->sa_sigaction(info->ssi_signo, &si, NULL);
+}