| 1 | /* setjmp for 64 bit S/390, ELF version. |
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| 2 | Copyright (C) 2001-2024 Free Software Foundation, Inc. |
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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 |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the 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 | #define _ASM |
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| 22 | #define _SETJMP_H |
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| 23 | #include <bits/setjmp.h> |
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| 24 | #include <shlib-compat.h> |
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| 25 | #include <stap-probe.h> |
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| 26 | |
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| 27 | #if !IS_IN (rtld) && defined SHARED \ |
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| 28 | && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20) |
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| 29 | # define NEED_COMPAT_SYMBOLS 1 |
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| 30 | /* We need a unique name in case of symbol versioning. */ |
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| 31 | # define setjmp __v1setjmp |
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| 32 | # define _setjmp __v1_setjmp |
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| 33 | # define __sigsetjmp __v1__sigsetjmp |
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| 34 | #else |
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| 35 | # define NEED_COMPAT_SYMBOLS 0 |
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| 36 | #endif |
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| 37 | |
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| 38 | /* We include the BSD entry points here as well. */ |
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| 39 | ENTRY (setjmp) |
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| 40 | lghi %r3,1 /* Second argument of one. */ |
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| 41 | j .Linternal_sigsetjmp /* Branch relative to __sigsetjmp. */ |
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| 42 | END (setjmp) |
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| 43 | |
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| 44 | /* Binary compatibility entry point. */ |
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| 45 | ENTRY(_setjmp) |
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| 46 | slgr %r3,%r3 /* Second argument of zero. */ |
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| 47 | j .Linternal_sigsetjmp /* Branch relative to __sigsetjmp. */ |
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| 48 | END (_setjmp) |
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| 49 | #if NEED_COMPAT_SYMBOLS |
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| 50 | strong_alias (_setjmp, __GI__setjmp) |
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| 51 | #else |
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| 52 | libc_hidden_def (_setjmp) |
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| 53 | #endif |
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| 54 | |
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| 55 | ENTRY(__setjmp) |
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| 56 | slgr %r3,%r3 /* Second argument of zero. */ |
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| 57 | j .Linternal_sigsetjmp /* Branch relative to __sigsetjmp. */ |
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| 58 | END (__setjmp) |
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| 59 | |
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| 60 | ENTRY(__sigsetjmp) |
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| 61 | .Linternal_sigsetjmp: |
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| 62 | /* setjmp probe expects sig/setjmp first argument (8@%r2), second |
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| 63 | argument (-8@%r3) and target address (8@%r14). */ |
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| 64 | LIBC_PROBE (setjmp, 3, 8@%r2, -4@%r3, 8@%r14) |
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| 65 | #ifdef PTR_MANGLE |
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| 66 | stmg %r6,%r13,0(%r2) /* Store registers in jmp_buf. */ |
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| 67 | lgr %r4,%r14 |
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| 68 | lgr %r5,%r15 |
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| 69 | PTR_MANGLE (%r4, %r1) |
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| 70 | PTR_MANGLE2 (%r5, %r1) |
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| 71 | stmg %r4,%r5,64(%r2) |
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| 72 | #else |
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| 73 | stmg %r6,%r15,0(%r2) /* Store registers in jmp_buf. */ |
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| 74 | #endif |
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| 75 | std %f8,80(%r2) |
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| 76 | std %f9,88(%r2) |
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| 77 | std %f10,96(%r2) |
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| 78 | std %f11,104(%r2) |
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| 79 | std %f12,112(%r2) |
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| 80 | std %f13,120(%r2) |
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| 81 | std %f14,128(%r2) |
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| 82 | std %f15,136(%r2) |
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| 83 | #if IS_IN (rtld) |
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| 84 | /* In ld.so we never save the signal mask. */ |
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| 85 | lghi %r2,0 |
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| 86 | br %r14 |
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| 87 | #elif defined PIC |
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| 88 | jg __sigjmp_save@PLT /* Branch to PLT of __sigsetjmp. */ |
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| 89 | #else |
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| 90 | jg __sigjmp_save |
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| 91 | #endif |
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| 92 | END (__sigsetjmp) |
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| 93 | #if NEED_COMPAT_SYMBOLS |
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| 94 | strong_alias (__sigsetjmp, __GI___sigsetjmp) |
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| 95 | #else |
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| 96 | libc_hidden_def (__sigsetjmp) |
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| 97 | #endif |
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| 98 | |
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| 99 | #if NEED_COMPAT_SYMBOLS |
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| 100 | /* In glibc release 2.19 new versions of setjmp-functions were introduced, |
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| 101 | but were reverted before 2.20. Thus both versions are the same function. */ |
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| 102 | |
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| 103 | # undef setjmp |
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| 104 | # undef _setjmp |
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| 105 | # undef __sigsetjmp |
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| 106 | |
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| 107 | strong_alias (__v1setjmp, __v2setjmp); |
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| 108 | versioned_symbol (libc, __v1setjmp, setjmp, GLIBC_2_0); |
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| 109 | compat_symbol (libc, __v2setjmp, setjmp, GLIBC_2_19); |
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| 110 | |
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| 111 | strong_alias (__v1_setjmp, __v2_setjmp); |
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| 112 | versioned_symbol (libc, __v1_setjmp, _setjmp, GLIBC_2_0); |
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| 113 | compat_symbol (libc, __v2_setjmp, _setjmp, GLIBC_2_19); |
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| 114 | |
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| 115 | strong_alias (__v1__sigsetjmp, __v2__sigsetjmp); |
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| 116 | versioned_symbol (libc, __v1__sigsetjmp, __sigsetjmp, GLIBC_2_0); |
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| 117 | compat_symbol (libc, __v2__sigsetjmp, __sigsetjmp, GLIBC_2_19); |
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| 118 | #endif /* NEED_COMPAT_SYMBOLS */ |
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| 119 | |
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