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submitted-makecontext.diff
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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