08b97f7ff2
At present we have a potential error in that helper_retaddr contains data for handle_cpu_signal, but we have not ensured that those stores will be scheduled properly before the operation that may fault. It might be that these races are not in practice observable, due to our use of -fno-strict-aliasing, but better safe than sorry. Adjust all of the setters of helper_retaddr. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/*
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* User-only accessor function support
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*
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* Generate inline load/store functions for one data size.
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*
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* Generate a store function as well as signed and unsigned loads.
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*
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* Not used directly but included from cpu_ldst.h.
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*
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* Copyright (c) 2015 Linaro Limited
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*
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* This 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 of the License, or (at your option) any later version.
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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(CODE_ACCESS)
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#include "trace-root.h"
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#endif
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#include "trace/mem.h"
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#if DATA_SIZE == 8
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#define SUFFIX q
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#define USUFFIX q
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#define DATA_TYPE uint64_t
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#define SHIFT 3
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#elif DATA_SIZE == 4
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#define SUFFIX l
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#define USUFFIX l
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#define DATA_TYPE uint32_t
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#define SHIFT 2
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#elif DATA_SIZE == 2
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#define SUFFIX w
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#define USUFFIX uw
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#define DATA_TYPE uint16_t
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#define DATA_STYPE int16_t
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#define SHIFT 1
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#elif DATA_SIZE == 1
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#define SUFFIX b
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#define USUFFIX ub
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#define DATA_TYPE uint8_t
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#define DATA_STYPE int8_t
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#define SHIFT 0
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#else
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#error unsupported data size
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#endif
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#if DATA_SIZE == 8
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#define RES_TYPE uint64_t
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#else
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#define RES_TYPE uint32_t
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#endif
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static inline RES_TYPE
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glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr)
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{
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#if !defined(CODE_ACCESS)
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trace_guest_mem_before_exec(
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env_cpu(env), ptr,
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trace_mem_build_info(SHIFT, false, MO_TE, false));
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#endif
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return glue(glue(ld, USUFFIX), _p)(g2h(ptr));
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}
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static inline RES_TYPE
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glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
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abi_ptr ptr,
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uintptr_t retaddr)
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{
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RES_TYPE ret;
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set_helper_retaddr(retaddr);
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ret = glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(env, ptr);
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clear_helper_retaddr();
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return ret;
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}
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#if DATA_SIZE <= 2
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static inline int
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glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr)
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{
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#if !defined(CODE_ACCESS)
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trace_guest_mem_before_exec(
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env_cpu(env), ptr,
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trace_mem_build_info(SHIFT, true, MO_TE, false));
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#endif
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return glue(glue(lds, SUFFIX), _p)(g2h(ptr));
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}
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static inline int
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glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
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abi_ptr ptr,
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uintptr_t retaddr)
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{
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int ret;
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set_helper_retaddr(retaddr);
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ret = glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(env, ptr);
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clear_helper_retaddr();
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return ret;
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}
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#endif
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#ifndef CODE_ACCESS
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static inline void
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glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr,
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RES_TYPE v)
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{
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#if !defined(CODE_ACCESS)
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trace_guest_mem_before_exec(
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env_cpu(env), ptr,
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trace_mem_build_info(SHIFT, false, MO_TE, true));
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#endif
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glue(glue(st, SUFFIX), _p)(g2h(ptr), v);
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}
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static inline void
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glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
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abi_ptr ptr,
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RES_TYPE v,
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uintptr_t retaddr)
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{
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set_helper_retaddr(retaddr);
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glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(env, ptr, v);
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clear_helper_retaddr();
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}
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#endif
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#undef RES_TYPE
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#undef DATA_TYPE
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#undef DATA_STYPE
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#undef SUFFIX
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#undef USUFFIX
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#undef DATA_SIZE
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#undef SHIFT
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