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ec603b5584
When we handle a signal from a fault within a user-only memory helper, we cannot cpu_restore_state with the PC found within the signal frame. Use a TLS variable, helper_retaddr, to record the unwind start point to find the faulting guest insn. Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
139 lines
3.7 KiB
C
139 lines
3.7 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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#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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#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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#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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#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, target_ulong 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_GET_CPU(env), ptr,
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trace_mem_build_info(DATA_SIZE, 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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target_ulong ptr,
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uintptr_t retaddr)
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{
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RES_TYPE ret;
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helper_retaddr = retaddr;
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ret = glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(env, ptr);
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helper_retaddr = 0;
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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, target_ulong 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_GET_CPU(env), ptr,
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trace_mem_build_info(DATA_SIZE, 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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target_ulong ptr,
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uintptr_t retaddr)
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{
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int ret;
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helper_retaddr = retaddr;
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ret = glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(env, ptr);
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helper_retaddr = 0;
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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, target_ulong 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_GET_CPU(env), ptr,
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trace_mem_build_info(DATA_SIZE, 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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target_ulong ptr,
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RES_TYPE v,
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uintptr_t retaddr)
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{
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helper_retaddr = retaddr;
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glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(env, ptr, v);
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helper_retaddr = 0;
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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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