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48 lines
1.6 KiB
ArmAsm
48 lines
1.6 KiB
ArmAsm
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/* Copyright (C) 1991, 1993 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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#ifdef __svr4__
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#include <sys/trap.h>
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#else
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#include <machine/trap.h>
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#endif
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/* NOTE: This code depends on the definition of `__jmp_buf' in <jmp_buf.h>. */
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ENTRY (__longjmp)
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/* Do a "flush register windows trap". The trap handler in the
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kernel writes all the register windows to their stack slots, and
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marks them all as invalid (needing to be sucked up from the
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stack when used). This ensures that all information needed to
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unwind to these callers is in memory, not in the register
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windows. */
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ta ST_FLUSH_WINDOWS
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ld [%o0], %o7 /* Return PC. */
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ld [%o0 + 4], %fp /* Saved SP. */
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sub %fp, 64, %sp /* Allocate a register save area. */
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/* if (%o1 == 0) %o1 = 1; */
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tst %o1
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be,a Ldone
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mov 1, %o1
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Ldone: retl
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/* On the way out, put the return value in %o0. */
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restore %o1, 0, %o0
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