aarch64: fix decoding of arm syscall numbers
If an aarch64 strace is tracing a process using the arm personality, it
also needs to call the shuffle_scno function for the ARM-specific
syscalls.
* syscall.c (shuffle_scno): Define on AARCH64.
(get_scno) [AARCH64]: Call shuffle_scno when the tracee is in 32-bit mode.
Signed-off-by: Elliott Hughes <enh@google.com>
diff --git a/syscall.c b/syscall.c
index a0cc312..5c4b42e 100644
--- a/syscall.c
+++ b/syscall.c
@@ -926,7 +926,7 @@
/* Shuffle syscall numbers so that we don't have huge gaps in syscall table.
* The shuffling should be reversible: shuffle_scno(shuffle_scno(n)) == n.
*/
-#if defined(ARM) /* So far only ARM needs this */
+#if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
static long
shuffle_scno(unsigned long scno)
{
@@ -1347,6 +1347,7 @@
/* We are in 32-bit mode */
/* Note: we don't support OABI, unlike 32-bit ARM build */
scno = arm_regs.ARM_r7;
+ scno = shuffle_scno(scno);
update_personality(tcp, 0);
break;
}