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/* arm64 ABI-specified defaults for DWARF CFI.
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Copyright (C) 2013, 2018 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <dwarf.h>
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#define BACKEND aarch64_
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#include "libebl_CPU.h"
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/* ABI-specified state of DWARF CFI based on:
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"DWARF for the ARM 64 bit architecture (AArch64) 1.0"
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http://infocenter.arm.com/help/topic/com.arm.doc.ihi0057b/IHI0057B_aadwarf64.pdf
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"Procedure Call Standard for the ARM 64 bit Architecture 1.0"
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http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055b/IHI0055B_aapcs64.pdf
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*/
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int
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aarch64_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
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{
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static const uint8_t abi_cfi[] =
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{
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/* The initial Canonical Frame Address is the value of the
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Stack Pointer (r31) as setup in the previous frame. */
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DW_CFA_def_cfa, ULEB128_7 (30), ULEB128_7 (0),
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#define SV(n) DW_CFA_same_value, ULEB128_7 (n)
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/* Callee-saved regs r19-r28. */
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SV (19), SV (20), SV (21), SV (22), SV (23),
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SV (24), SV (25), SV (26), SV (27), SV (28),
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/* The Frame Pointer (FP, r29) and Link Register (LR, r30). */
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SV (29), SV (30),
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/* The Stack Pointer (r31) is restored from CFA address by default. */
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DW_CFA_val_offset, ULEB128_7 (31), ULEB128_7 (0),
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/* Callee-saved fpregs v8-v15. v0 == 64. */
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SV (72), SV (73), SV (74), SV (75),
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SV (76), SV (77), SV (78), SV (79),
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#undef SV
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/* XXX Note: registers intentionally unused by the program,
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for example as a consequence of the procedure call standard
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should be initialized as if by DW_CFA_same_value. */
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};
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abi_info->initial_instructions = abi_cfi;
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abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
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abi_info->data_alignment_factor = -4;
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abi_info->return_address_register = 30; /* lr. */
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return 0;
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}
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