?? __longjmp.c
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/* Copyright (C) 2000, 2001, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */#include <errno.h>#include <sysdep.h>#include <setjmp.h>#include <bits/setjmp.h>#include <stdlib.h>#include <unistd.h>/* Jump to the position specified by ENV, causing the setjmp call there to return VAL, or 1 if VAL is 0. */void__longjmp (__jmp_buf env, int val){ register int r2 __asm ("%r2") = val == 0 ? 1 : val;#ifdef PTR_DEMANGLE register uintptr_t r3 __asm ("%r3") = THREAD_GET_POINTER_GUARD (); register void *r1 __asm ("%r1") = (void *) env;#endif /* Restore registers and jump back. */ asm volatile ("ld %%f6,48(%1)\n\t" "ld %%f4,40(%1)\n\t"#ifdef PTR_DEMANGLE "lm %%r6,%%r13,0(%1)\n\t" "lm %%r4,%%r5,32(%1)\n\t" "xr %%r4,%2\n\t" "xr %%r5,%2\n\t" "lr %%r15,%%r5\n\t" "br %%r4"#else "lm %%r6,%%r15,0(%1)\n\t" "br %%r14"#endif : : "r" (r2),#ifdef PTR_DEMANGLE "r" (r1), "r" (r3)#else "a" (env)#endif ); /* Avoid `volatile function does return' warnings. */ for (;;);}
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