Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / arch / mips / kernel / elf.c

diff --git a/arch/mips/kernel/elf.c b/arch/mips/kernel/elf.c
index e6eb7f1f772387be5f0444164abb114ee1495c09..6430bff21fff80a7bb6647c6af0198364cac7bdd 100644 (file)
--- a/arch/mips/kernel/elf.c
+++ b/arch/mips/kernel/elf.c
@@ -8,9 +8,12 @@
  * option) any later version.
  */
 
+#include <linux/binfmts.h>
 #include <linux/elf.h>
+#include <linux/export.h>
 #include <linux/sched.h>
 
+#include <asm/cpu-features.h>
 #include <asm/cpu-info.h>
 
 /* Whether to accept legacy-NaN and 2008-NaN user binaries.  */
@@ -326,3 +329,19 @@ void mips_set_personality_nan(struct arch_elf_state *state)
                BUG();
        }
 }
+
+int mips_elf_read_implies_exec(void *elf_ex, int exstack)
+{
+       if (exstack != EXSTACK_DISABLE_X) {
+               /* The binary doesn't request a non-executable stack */
+               return 1;
+       }
+
+       if (!cpu_has_rixi) {
+               /* The CPU doesn't support non-executable memory */
+               return 1;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL(mips_elf_read_implies_exec);