Adding workaround for differences in glibc/libc6 >= & < 2.30 versions…

… and gettid()
tpiekarski · Aug 19, 2020 · 2760f0b · 2760f0b
1 parent 1546b3f
commit 2760f0b
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/pocs/io-port-permissions/permissions-revisited.c b/pocs/io-port-permissions/permissions-revisited.c
@@ -33,6 +33,12 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 30
+// Workaround for missing gettid() - it is only available with glibc >= 2.30.
+#include <sys/syscall.h>
+#define gettid() (int)syscall(SYS_gettid)
+#endif
+
 #define PORT 0x378 // lp0
 #define STACK_SIZE 1024 * 1024
 #define EXECVE_TARGET "permissions-with-execve-target"