| 1 | /* Copyright (C) 1997-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | /* longjmp is implemented in terms of the setcontext trap on Linux/Sparc64. */ |
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| 19 | |
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| 20 | #include <sysdep.h> |
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| 21 | |
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| 22 | /* Offsets into the jmp_buf structure. */ |
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| 23 | |
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| 24 | #define O_mask_was_saved 512 |
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| 25 | #define O_gregs 32 |
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| 26 | #define O_g1 (O_gregs + 4*8) |
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| 27 | |
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| 28 | |
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| 29 | /* void longjmp (sigjmp_buf env, int val) */ |
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| 30 | |
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| 31 | ENTRY(__libc_siglongjmp) |
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| 32 | |
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| 33 | /* Modify the context with the value we want to return. */ |
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| 34 | movre %o1, 1, %o1 |
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| 35 | stx %o1, [%o0 + O_g1] |
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| 36 | |
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| 37 | /* Let setcontext know if we want to modify the current sigmask. */ |
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| 38 | ld [%o0 + O_mask_was_saved], %o1 |
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| 39 | |
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| 40 | /* And bamf back to where we belong! */ |
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| 41 | ta 0x6f |
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| 42 | |
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| 43 | END(__libc_siglongjmp) |
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| 44 | |
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| 45 | strong_alias(__libc_siglongjmp, __longjmp) |
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| 46 | strong_alias(__libc_siglongjmp, __libc_longjmp) |
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| 47 | weak_alias (__libc_siglongjmp, longjmp) |
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| 48 | weak_alias (__libc_siglongjmp, _longjmp) |
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| 49 | weak_alias (__libc_siglongjmp, siglongjmp) |
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| 50 | |
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