| 1 | /* Copyright (C) 1997-2024 Free Software Foundation, Inc. |
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| 2 | |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public License as |
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| 7 | published by the Free Software Foundation; either version 2.1 of the |
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| 8 | License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <sysdep.h> |
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| 20 | #include <pointer_guard.h> |
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| 21 | #include <jmpbuf-offsets.h> |
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| 22 | #include <stap-probe.h> |
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| 23 | |
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| 24 | /* Keep traditional entry points in with sigsetjmp(). */ |
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| 25 | ENTRY (setjmp) |
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| 26 | mov x1, #1 |
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| 27 | b 1f |
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| 28 | END (setjmp) |
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| 29 | |
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| 30 | ENTRY (_setjmp) |
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| 31 | mov x1, #0 |
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| 32 | b 1f |
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| 33 | END (_setjmp) |
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| 34 | libc_hidden_def (_setjmp) |
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| 35 | |
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| 36 | ENTRY (__sigsetjmp) |
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| 37 | PTR_ARG (0) |
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| 38 | |
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| 39 | 1: |
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| 40 | stp x19, x20, [x0, #JB_X19<<3] |
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| 41 | stp x21, x22, [x0, #JB_X21<<3] |
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| 42 | stp x23, x24, [x0, #JB_X23<<3] |
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| 43 | stp x25, x26, [x0, #JB_X25<<3] |
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| 44 | stp x27, x28, [x0, #JB_X27<<3] |
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| 45 | |
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| 46 | #ifdef PTR_MANGLE |
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| 47 | PTR_MANGLE (4, 30, 3, 2) |
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| 48 | stp x29, x4, [x0, #JB_X29<<3] |
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| 49 | #else |
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| 50 | stp x29, x30, [x0, #JB_X29<<3] |
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| 51 | #endif |
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| 52 | /* setjmp probe takes 3 arguments, address of jump buffer |
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| 53 | first argument (8@x0), return value second argument (-4@x1), |
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| 54 | and target address (8@x30), respectively. */ |
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| 55 | LIBC_PROBE (setjmp, 3, 8@x0, -4@x1, 8@x30) |
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| 56 | stp d8, d9, [x0, #JB_D8<<3] |
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| 57 | stp d10, d11, [x0, #JB_D10<<3] |
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| 58 | stp d12, d13, [x0, #JB_D12<<3] |
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| 59 | stp d14, d15, [x0, #JB_D14<<3] |
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| 60 | #ifdef PTR_MANGLE |
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| 61 | mov x4, sp |
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| 62 | PTR_MANGLE (5, 4, 3, 2) |
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| 63 | str x5, [x0, #JB_SP<<3] |
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| 64 | #else |
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| 65 | mov x2, sp |
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| 66 | str x2, [x0, #JB_SP<<3] |
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| 67 | #endif |
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| 68 | #if IS_IN (rtld) |
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| 69 | /* In ld.so we never save the signal mask */ |
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| 70 | mov w0, #0 |
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| 71 | RET |
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| 72 | #else |
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| 73 | b C_SYMBOL_NAME(__sigjmp_save) |
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| 74 | #endif |
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| 75 | END (__sigsetjmp) |
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| 76 | hidden_def (__sigsetjmp) |
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| 77 | |
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