restore: Use prctl for vDSO restoration

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

include/types.h

@@ -38,6 +38,21 @@
 #define PTRACE_O_TRACEVFORKDONE	0x00000020
 #define PTRACE_O_TRACEEXIT	0x00000040
 
+/* prctl.h */
+#define PR_SET_NAME	15
+#define PR_GET_NAME	16
+
+#define PR_CKPT_CTL	35
+# define PR_CKPT_CTL_SETUP_VDSO_AT		1
+# define PR_CKPT_CTL_SET_TASK_FLAGS		2
+# define PR_CKPT_CTL_SET_MM_START_CODE		3
+# define PR_CKPT_CTL_SET_MM_END_CODE		4
+# define PR_CKPT_CTL_SET_MM_START_DATA		5
+# define PR_CKPT_CTL_SET_MM_END_DATA		6
+# define PR_CKPT_CTL_SET_MM_START_STACK		7
+# define PR_CKPT_CTL_SET_MM_START_BRK		8
+# define PR_CKPT_CTL_SET_MM_BRK			9
+
 /* fcntl */
 #ifndef F_LINUX_SPECIFIC_BASE
 #define F_LINUX_SPECIFIC_BASE	1024

restorer.c

@@ -214,6 +214,17 @@ self_len_end:
 			if (!vma_entry.start)
 				break;
 
+			if (vma_entry.status & VMA_AREA_VDSO) {
+				ret = sys_prctl(PR_CKPT_CTL, PR_CKPT_CTL_SETUP_VDSO_AT,
+						vma_entry.start, 0, 0);
+				if (ret) {
+					write_hex_n(__LINE__);
+					write_hex_n(ret);
+					goto core_restore_end;
+				}
+				continue;
+			}
+
 			if (!(vma_entry.status & VMA_AREA_REGULAR))
 				continue;