minijail: add local definitions of MADV_FREE and __NR_membarrier
MADV_FREE and __NR_membarrier are used internally by musl libc and
therefore added to the crosvm seccomp policies by b/258117555, but
are not defined by the old glibc prebuilts in the Android platform.
Add defines for MADV_FREE and __NR_mmebarrier to gen_constants-inl.h
and gen_syscalls-inl.h.
Bug: 263152407
Test: launch_cvd --cpus=4 --memory_mb=4096 --console=true --enable_sandbox=true --base_instance_num=1 --report_anonymous_usage_stats=n --undefok=base_instance_num,console,enable_sandbox,report_anonymous_usage_stats
Change-Id: I9633e7403f924cdf454c9dc3bebae7740f621091
diff --git a/gen_constants-inl.h b/gen_constants-inl.h
index f5fdd29..d09349c 100644
--- a/gen_constants-inl.h
+++ b/gen_constants-inl.h
@@ -73,3 +73,7 @@
#if !defined(FS_IOC_GET_ENCRYPTION_POLICY_EX)
#define FS_IOC_GET_ENCRYPTION_POLICY_EX _IOWR('f', 22, __u8[9])
#endif
+
+#if !defined(MADV_FREE)
+#define MADV_FREE 8
+#endif
diff --git a/gen_syscalls-inl.h b/gen_syscalls-inl.h
index 7a2f230..aee71e2 100644
--- a/gen_syscalls-inl.h
+++ b/gen_syscalls-inl.h
@@ -92,3 +92,13 @@
#endif
#endif /* __NR_rseq */
+
+#ifndef __NR_membarrier
+#ifdef __x86_64__
+#define __NR_membarrier 324
+#elif __i386__
+#define __NR_membarrier 375
+#elif __arm64__
+#define __NR_membarrier 283
+#endif
+#endif /* __NR_membarrier */
