commit df22a121b2c75021585e4eea49fd3af92d579dd0
author Christopher Ferris <cferris@google.com> Wed May 21 16:00:13 2014 -0700
committer Christopher Ferris <cferris@google.com> Wed May 21 17:46:52 2014 -0700
tree 927ac89db11ccb8206b7c9d8591830f487d9bb20
parent 3d5a42408ca24f86b8b81697b20012736cb48c2b

Add cfi directives for arm64 assembler.

Fix syscall generator to add cfi directives and add the directives
for all arm64 assembler.

Bug: 15138290
Change-Id: I7f0e4a16c141ac624e5276917a3a1ed45778e057

libc/tools/gensyscalls.py

diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index 8a5f3d2..87d51e3 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -96,14 +96,18 @@
 
 arm64_call = syscall_stub_header + """\
     stp     x29, x30, [sp, #-16]!
+    .cfi_def_cfa_offset 16
+    .cfi_rel_offset x29, 0
+    .cfi_rel_offset x30, 8
     mov     x29,  sp
-    str     x8,       [sp, #-16]!
 
     mov     x8, %(__NR_name)s
     svc     #0
 
-    ldr     x8,       [sp], #16
     ldp     x29, x30, [sp], #16
+    .cfi_def_cfa_offset 0
+    .cfi_restore x29
+    .cfi_restore x30
 
     cmn     x0, #(MAX_ERRNO + 1)
     cneg    x0, x0, hi