76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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/* Test setjmp interoperability with static dlopen BZ #21895.
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Copyright (C) 2017-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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/* Set TOC area pointed by sp to zero. */
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#define SET_TOC_TO_ZERO(sp) \
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({ \
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unsigned int zero = 0; \
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asm volatile ("std %0, 24(%1)\n\t" :: "r" (zero), "r" (sp)); \
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})
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static void
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bar (jmp_buf jb, unsigned long sp)
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{
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static int i;
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if (i++==1)
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exit(0); /* Success. */
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/* This will set TOC are on caller frame (foo) to zero. __longjmp
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must restore r2 otherwise a segmentation fault will happens after
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it jumps back to foo. */
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SET_TOC_TO_ZERO(sp);
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longjmp(jb, i);
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}
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static int
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do_test (void)
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{
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void *h = dlopen("setjmp-bug21895.so", RTLD_NOW);
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if (!h)
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{
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puts(dlerror());
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return 1;
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}
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void (*pfoo)(void) = dlsym(h, "foo");
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if (!pfoo)
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{
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puts(dlerror());
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return 1;
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}
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void (**ppbar)(jmp_buf, unsigned long) = dlsym(h, "bar");
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if (!ppbar)
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{
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puts(dlerror());
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return 1;
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}
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*ppbar = bar;
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pfoo();
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for(;;);
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}
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#include <support/test-driver.c>
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