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diff --git a/src/third_party/unwind/dist/src/ia64/siglongjmp.S b/src/third_party/unwind/dist/src/ia64/siglongjmp.S
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+/* libunwind - a platform-independent unwind library
+ Copyright (C) 2003-2004 Hewlett-Packard Co
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+#define SIG_SETMASK 2
+
+ .global _UI_siglongjmp_cont
+ .global sigprocmask
+
+ .align 32
+ .proc siglongjmp_continuation
+siglongjmp_continuation:
+_UI_siglongjmp_cont: // non-function label for siglongjmp.c
+ .prologue
+ .save rp, r15
+ .body
+ nop 0
+ nop 0
+ br.call.sptk.many b6 = .next
+ ;;
+ .prologue
+ .save ar.pfs, r33
+.next: alloc loc1 = ar.pfs, 0, 3, 3, 0
+ /*
+ * Note: we can use the scratch stack are because the caller
+ * of sigsetjmp() by definition is not a leaf-procedure.
+ */
+ st8 [sp] = r17 // store signal mask
+ .save rp, loc0
+ mov loc0 = r15 // final continuation point
+ ;;
+ .body
+ mov loc2 = r16 // value to return in r8
+
+ mov out0 = SIG_SETMASK
+ mov out1 = sp
+ mov out2 = r0
+ br.call.sptk.many rp = sigprocmask
+ ;;
+ mov rp = loc0
+ mov ar.pfs = loc1
+ mov r8 = loc2
+ br.ret.sptk.many rp
+ .endp siglongjmp_continuation
+#ifdef __linux__
+ /* We do not need executable stack. */
+ .section .note.GNU-stack,"",@progbits
+#endif