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Diffstat (limited to 'libc/sysdeps/linux/x86_64')
-rw-r--r--libc/sysdeps/linux/x86_64/sigaction.c28
1 files changed, 20 insertions, 8 deletions
diff --git a/libc/sysdeps/linux/x86_64/sigaction.c b/libc/sysdeps/linux/x86_64/sigaction.c
index 75eb46784..f701d5047 100644
--- a/libc/sysdeps/linux/x86_64/sigaction.c
+++ b/libc/sysdeps/linux/x86_64/sigaction.c
@@ -17,23 +17,35 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+
#include <errno.h>
+#include <stddef.h>
#include <signal.h>
#include <string.h>
+
+
#include <sys/syscall.h>
+
+
+
+/* The difference here is that the sigaction structure used in the
+ kernel is not the same as we use in the libc. Therefore we must
+ translate it here. */
#include <bits/kernel_sigaction.h>
+/* We do not globally define the SA_RESTORER flag so do it here. */
#define SA_RESTORER 0x04000000
-
#if defined __NR_rt_sigaction
-#warning Yes there are two warnings here. Don't worry about it.
-static void restore_rt (void) asm ("__restore_rt");
-static void restore (void) asm ("__restore");
+/* Using the hidden attribute here does not change the code but it
+ helps to avoid warnings. */
+extern void restore_rt (void) asm ("__restore_rt") attribute_hidden;
+extern void restore (void) asm ("__restore") attribute_hidden;
/* If ACT is not NULL, change the action for SIG to *ACT.
If OACT is not NULL, put the old action for SIG in *OACT. */
-int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+int
+__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
int result;
struct kernel_sigaction kact, koact;
@@ -61,12 +73,12 @@ int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oa
}
#else
-#warning "Yes there is a warning here. Don't worry about it."
-static void restore (void) asm ("__restore");
+extern void restore (void) asm ("__restore") attribute_hidden;
/* If ACT is not NULL, change the action for SIG to *ACT.
If OACT is not NULL, put the old action for SIG in *OACT. */
-int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+int
+__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
int result;
struct old_kernel_sigaction kact, koact;