| 1 | //===-- Implementation of sigsetjmp ---------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/setjmp/sigsetjmp.h" |
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| 10 | #include "hdr/offsetof_macros.h" |
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| 11 | #include "src/__support/common.h" |
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| 12 | #include "src/__support/macros/config.h" |
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| 13 | #include "src/setjmp/setjmp_impl.h" |
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| 14 | #include "src/setjmp/sigsetjmp_epilogue.h" |
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| 15 | |
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| 16 | namespace LIBC_NAMESPACE_DECL { |
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| 17 | [[gnu::naked]] |
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| 18 | LLVM_LIBC_FUNCTION(int, sigsetjmp, (sigjmp_buf, int)) { |
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| 19 | asm(R"( |
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| 20 | cbz w1, %c[setjmp] |
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| 21 | |
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| 22 | str x30, [x0, %c[retaddr]] |
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| 23 | str x19, [x0, %c[extra]] |
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| 24 | mov x19, x0 |
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| 25 | bl %c[setjmp] |
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| 26 | |
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| 27 | mov w1, w0 |
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| 28 | mov x0, x19 |
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| 29 | ldr x30, [x0, %c[retaddr]] |
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| 30 | ldr x19, [x0, %c[extra]] |
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| 31 | b %c[epilogue])" ::[retaddr] "i" (offsetof(__jmp_buf, sig_retaddr)), |
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| 32 | [extra] "i" (offsetof(__jmp_buf, sig_extra)), [setjmp] "i" (setjmp), |
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| 33 | [epilogue] "i" (sigsetjmp_epilogue) |
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| 34 | : "x0" , "x1" , "x19" , "x30" ); |
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| 35 | } |
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| 36 | } // namespace LIBC_NAMESPACE_DECL |
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| 37 | |
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