| 1 | //===----------------------------------------------------------------------===// |
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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 | |
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| 10 | #ifndef LIBUNWIND_CET_UNWIND_H |
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| 11 | #define LIBUNWIND_CET_UNWIND_H |
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| 12 | |
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| 13 | #include "libunwind.h" |
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| 14 | |
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| 15 | // Currently, CET is implemented on Linux x86 platforms. |
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| 16 | #if defined(_LIBUNWIND_TARGET_LINUX) && defined(__CET__) && defined(__SHSTK__) |
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| 17 | #define _LIBUNWIND_USE_CET 1 |
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| 18 | #endif |
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| 19 | |
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| 20 | #if defined(_LIBUNWIND_USE_CET) |
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| 21 | #include <cet.h> |
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| 22 | #include <immintrin.h> |
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| 23 | |
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| 24 | #define _LIBUNWIND_POP_CET_SSP(x) \ |
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| 25 | do { \ |
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| 26 | unsigned long ssp = _get_ssp(); \ |
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| 27 | if (ssp != 0) { \ |
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| 28 | unsigned int tmp = (x); \ |
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| 29 | while (tmp > 255) { \ |
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| 30 | _inc_ssp(255); \ |
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| 31 | tmp -= 255; \ |
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| 32 | } \ |
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| 33 | _inc_ssp(tmp); \ |
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| 34 | } \ |
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| 35 | } while (0) |
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| 36 | #endif |
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| 37 | |
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| 38 | extern void *__libunwind_cet_get_registers(unw_cursor_t *); |
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| 39 | extern void *__libunwind_cet_get_jump_target(void); |
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| 40 | |
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| 41 | #endif |
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| 42 | |
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