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- /* Common target dependent code for GNU/Linux on PPC systems.
- Copyright (C) 2018-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "gdbsupport/common-defs.h"
- #include "arch/ppc-linux-common.h"
- #include "arch/ppc-linux-tdesc.h"
- /* Decimal Floating Point bit in AT_HWCAP.
- This file can be used by a host with another architecture, e.g.
- when debugging core files, which might not provide this constant. */
- #ifndef PPC_FEATURE_HAS_DFP
- #define PPC_FEATURE_HAS_DFP 0x00000400
- #endif
- bool
- ppc_linux_has_isa205 (CORE_ADDR hwcap)
- {
- /* Power ISA 2.05 (implemented by Power 6 and newer processors)
- increases the FPSCR from 32 bits to 64 bits. Even though Power 7
- supports this ISA version, it doesn't have PPC_FEATURE_ARCH_2_05
- set, only PPC_FEATURE_ARCH_2_06. Since for now the only bits
- used in the higher half of the register are for Decimal Floating
- Point, we check if that feature is available to decide the size
- of the FPSCR. */
- return ((hwcap & PPC_FEATURE_HAS_DFP) != 0);
- }
- const struct target_desc *
- ppc_linux_match_description (struct ppc_linux_features features)
- {
- struct target_desc *tdesc = NULL;
- if (features.wordsize == 8)
- {
- if (features.vsx)
- tdesc = (features.htm? tdesc_powerpc_isa207_htm_vsx64l
- : features.isa207? tdesc_powerpc_isa207_vsx64l
- : features.ppr_dscr? tdesc_powerpc_isa205_ppr_dscr_vsx64l
- : features.isa205? tdesc_powerpc_isa205_vsx64l
- : tdesc_powerpc_vsx64l);
- else if (features.altivec)
- tdesc = (features.isa205? tdesc_powerpc_isa205_altivec64l
- : tdesc_powerpc_altivec64l);
- else
- tdesc = (features.isa205? tdesc_powerpc_isa205_64l
- : tdesc_powerpc_64l);
- }
- else
- {
- gdb_assert (features.wordsize == 4);
- if (features.vsx)
- tdesc = (features.htm? tdesc_powerpc_isa207_htm_vsx32l
- : features.isa207? tdesc_powerpc_isa207_vsx32l
- : features.ppr_dscr? tdesc_powerpc_isa205_ppr_dscr_vsx32l
- : features.isa205? tdesc_powerpc_isa205_vsx32l
- : tdesc_powerpc_vsx32l);
- else if (features.altivec)
- tdesc = (features.isa205? tdesc_powerpc_isa205_altivec32l
- : tdesc_powerpc_altivec32l);
- else
- tdesc = (features.isa205? tdesc_powerpc_isa205_32l
- : tdesc_powerpc_32l);
- }
- gdb_assert (tdesc != NULL);
- return tdesc;
- }
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