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61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/* Bounded-pointer definitions for x86 assembler.
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Copyright (C) 2000-2013 Free Software Foundation, Inc.
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Contributed by Greg McGary <greg@mcgary.org>
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This file is part of the GNU C Library. Its master source is NOT part of
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the C library, however. The master source lives in the GNU MP 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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<http://www.gnu.org/licenses/>. */
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#ifndef _bp_asm_h_
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# define _bp_asm_h_ 1
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# if __ASSEMBLER__
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# if __BOUNDED_POINTERS__
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/* Bounded pointers occupy three words. */
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# define PTR_SIZE 12
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/* Bounded pointer return values are passed back through a hidden
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argument that points to caller-allocate space. The hidden arg
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occupies one word on the stack. */
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# define RTN_SIZE 4
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/* Although the caller pushes the hidden arg, the callee is
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responsible for popping it. */
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# define RET_PTR ret $RTN_SIZE
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/* Stack space overhead of procedure-call linkage: return address and
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frame pointer. */
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# define LINKAGE 8
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/* Stack offset of return address after calling ENTER. */
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# define PCOFF 4
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# else /* !__BOUNDED_POINTERS__ */
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/* Unbounded pointers occupy one word. */
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# define PTR_SIZE 4
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/* Unbounded pointer return values are passed back in the register %eax. */
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# define RTN_SIZE 0
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/* Use simple return instruction for unbounded pointer values. */
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# define RET_PTR ret
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/* Stack space overhead of procedure-call linkage: return address only. */
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# define LINKAGE 4
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/* Stack offset of return address after calling ENTER. */
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# define PCOFF 0
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# endif /* !__BOUNDED_POINTERS__ */
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# endif /* __ASSEMBLER__ */
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#endif /* _bp_asm_h_ */
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