| 1 | /* Copyright (C) 1992-2022 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 | #include <errno.h> |
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| 19 | #include <signal.h> |
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| 20 | #include <hurd.h> |
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| 21 | |
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| 22 | /* Run signals handlers on the stack specified by SS (if not NULL). |
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| 23 | If OSS is not NULL, it is filled in with the old signal stack status. */ |
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| 24 | int |
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| 25 | sigstack (struct sigstack *ss, struct sigstack *oss) |
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| 26 | { |
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| 27 | stack_t as, oas; |
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| 28 | |
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| 29 | as.ss_sp = ss->ss_sp; |
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| 30 | as.ss_size = 0; |
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| 31 | as.ss_flags = 0; |
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| 32 | |
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| 33 | if (__sigaltstack (&as, &oas) < 0) |
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| 34 | return -1; |
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| 35 | |
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| 36 | if (oss != NULL) |
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| 37 | { |
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| 38 | oss->ss_sp = oas.ss_sp; |
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| 39 | oss->ss_onstack = oas.ss_flags & SS_ONSTACK; |
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| 40 | } |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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