[PATCH] aarch64: Add unwind information to _start (bug 26853)

Florian Weimer fweimer@redhat.com
Mon Nov 9 11:06:25 GMT 2020


This adds CFI directives which communicate that the stack ends
with this function.

Fixes bug 26853.

---
 sysdeps/aarch64/start.S | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S
index 75393e1c18..108f602721 100644
--- a/sysdeps/aarch64/start.S
+++ b/sysdeps/aarch64/start.S
@@ -43,11 +43,9 @@
  */
 
 	.text
-	.globl _start
-	.type _start,#function
-_start:
-	BTI_C
+ENTRY(_start)
 	/* Create an initial frame with 0 LR and FP */
+	cfi_undefined (x30)
 	mov	x29, #0
 	mov	x30, #0
 
@@ -103,6 +101,7 @@ _start:
 __wrap_main:
 	b	main
 #endif
+END(_start)
 
 	/* Define a symbol for the first piece of initialized data.  */
 	.data

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