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2018-03-01 Aurelien Jarno <aurelien@aurel32.net>
[BZ #22910]
* sysdeps/unix/sysv/linux/alpha/setcontext.S (__startcontext): Set
up CFI directive to forbid further backtracing.
--- a/sysdeps/unix/sysv/linux/alpha/makecontext.S
+++ b/sysdeps/unix/sysv/linux/alpha/makecontext.S
@@ -138,10 +138,14 @@ weak_alias (__makecontext, makecontext)
.align 4
.ent __startcontext
+ cfi_startproc
__startcontext:
.frame $31, 0, $31, 0
.prologue 0
+ /* Mark ra as undefined in order to stop unwinding here. */
+ cfi_undefined(ra)
+
jsr $26, ($27), 0
ldgp $29, 0($26)
mov $9, $16
@@ -160,4 +164,5 @@ __startcontext:
halt
+ cfi_endproc
.end __startcontext
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