1/* setjmp for 64 bit S/390, ELF version.
2   Copyright (C) 2001-2022 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <sysdep.h>
20#define _ASM
21#define _SETJMP_H
22#include <bits/setjmp.h>
23#include <shlib-compat.h>
24#include <stap-probe.h>
25
26#if !IS_IN (rtld) && defined SHARED \
27  && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20)
28# define NEED_COMPAT_SYMBOLS 1
29/* We need a unique name in case of symbol versioning.  */
30# define setjmp __v1setjmp
31# define _setjmp __v1_setjmp
32# define __sigsetjmp __v1__sigsetjmp
33#else
34# define NEED_COMPAT_SYMBOLS 0
35#endif
36
37	/* We include the BSD entry points here as well.  */
38ENTRY (setjmp)
39	lghi   %r3,1                /* Second argument of one.  */
40	j      .Linternal_sigsetjmp /* Branch relativ to __sigsetjmp.  */
41END (setjmp)
42
43	/* Binary compatibility entry point.  */
44ENTRY(_setjmp)
45	slgr   %r3,%r3              /* Second argument of zero.  */
46	j      .Linternal_sigsetjmp /* Branch relativ to __sigsetjmp.  */
47END (_setjmp)
48#if NEED_COMPAT_SYMBOLS
49strong_alias (_setjmp, __GI__setjmp)
50#else
51libc_hidden_def (_setjmp)
52#endif
53
54ENTRY(__setjmp)
55	slgr   %r3,%r3              /* Second argument of zero.  */
56	j      .Linternal_sigsetjmp /* Branch relativ to __sigsetjmp.  */
57END (__setjmp)
58
59ENTRY(__sigsetjmp)
60.Linternal_sigsetjmp:
61	/* setjmp probe expects sig/setjmp first argument (8@%r2), second
62	   argument (-8@%r3) and target address (8@%r14).  */
63	LIBC_PROBE (setjmp, 3, 8@%r2, -4@%r3, 8@%r14)
64#ifdef PTR_MANGLE
65	stmg   %r6,%r13,0(%r2)      /* Store registers in jmp_buf.  */
66	lgr    %r4,%r14
67	lgr    %r5,%r15
68	PTR_MANGLE (%r4, %r1)
69	PTR_MANGLE2 (%r5, %r1)
70	stmg   %r4,%r5,64(%r2)
71#else
72	stmg   %r6,%r15,0(%r2)      /* Store registers in jmp_buf.  */
73#endif
74	std    %f8,80(%r2)
75	std    %f9,88(%r2)
76	std    %f10,96(%r2)
77	std    %f11,104(%r2)
78	std    %f12,112(%r2)
79	std    %f13,120(%r2)
80	std    %f14,128(%r2)
81	std    %f15,136(%r2)
82#if IS_IN (rtld)
83	/* In ld.so we never save the signal mask.  */
84	lghi   %r2,0
85	br     %r14
86#elif defined PIC
87	jg     __sigjmp_save@PLT    /* Branch to PLT of __sigsetjmp.  */
88#else
89	jg     __sigjmp_save
90#endif
91END (__sigsetjmp)
92#if NEED_COMPAT_SYMBOLS
93strong_alias (__sigsetjmp, __GI___sigsetjmp)
94#else
95libc_hidden_def (__sigsetjmp)
96#endif
97
98#if NEED_COMPAT_SYMBOLS
99/* In glibc release 2.19 new versions of setjmp-functions were introduced,
100   but were reverted before 2.20. Thus both versions are the same function.  */
101
102# undef setjmp
103# undef _setjmp
104# undef __sigsetjmp
105
106strong_alias (__v1setjmp, __v2setjmp);
107versioned_symbol (libc, __v1setjmp, setjmp, GLIBC_2_0);
108compat_symbol (libc, __v2setjmp, setjmp, GLIBC_2_19);
109
110strong_alias (__v1_setjmp, __v2_setjmp);
111versioned_symbol (libc, __v1_setjmp, _setjmp, GLIBC_2_0);
112compat_symbol (libc, __v2_setjmp, _setjmp, GLIBC_2_19);
113
114strong_alias (__v1__sigsetjmp, __v2__sigsetjmp);
115versioned_symbol (libc, __v1__sigsetjmp, __sigsetjmp, GLIBC_2_0);
116compat_symbol (libc, __v2__sigsetjmp, __sigsetjmp, GLIBC_2_19);
117#endif /* NEED_COMPAT_SYMBOLS */
118