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e7424abc20
Record trap_arg{0,1,2} for the linux-user signal frame.
Raise SIGBUS directly from cpu_loop_exit_sigbus, which means
we can remove the code for EXCP_UNALIGN in cpu_loop.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
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* Helpers for loads and stores
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*
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* Copyright (c) 2007 Jocelyn Mayer
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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 2.1 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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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/helper-proto.h"
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#include "exec/exec-all.h"
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#include "exec/cpu_ldst.h"
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static void do_unaligned_access(CPUAlphaState *env, vaddr addr, uintptr_t retaddr)
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{
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uint64_t pc;
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uint32_t insn;
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cpu_restore_state(env_cpu(env), retaddr, true);
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pc = env->pc;
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insn = cpu_ldl_code(env, pc);
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env->trap_arg0 = addr;
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env->trap_arg1 = insn >> 26; /* opcode */
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env->trap_arg2 = (insn >> 21) & 31; /* dest regno */
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}
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#ifdef CONFIG_USER_ONLY
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void alpha_cpu_record_sigbus(CPUState *cs, vaddr addr,
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MMUAccessType access_type, uintptr_t retaddr)
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{
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AlphaCPU *cpu = ALPHA_CPU(cs);
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CPUAlphaState *env = &cpu->env;
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do_unaligned_access(env, addr, retaddr);
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}
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#else
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void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
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MMUAccessType access_type,
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int mmu_idx, uintptr_t retaddr)
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{
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AlphaCPU *cpu = ALPHA_CPU(cs);
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CPUAlphaState *env = &cpu->env;
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do_unaligned_access(env, addr, retaddr);
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cs->exception_index = EXCP_UNALIGN;
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env->error_code = 0;
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cpu_loop_exit(cs);
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}
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void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
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vaddr addr, unsigned size,
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MMUAccessType access_type,
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int mmu_idx, MemTxAttrs attrs,
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MemTxResult response, uintptr_t retaddr)
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{
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AlphaCPU *cpu = ALPHA_CPU(cs);
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CPUAlphaState *env = &cpu->env;
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env->trap_arg0 = addr;
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env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0;
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cs->exception_index = EXCP_MCHK;
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env->error_code = 0;
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cpu_loop_exit_restore(cs, retaddr);
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}
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#endif /* CONFIG_USER_ONLY */
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