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target/ppc: Add do_unaligned_access hook

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This allows faults from MO_ALIGN to have the same effect
as from gen_check_align.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Richard Henderson 2018-06-26 09:19:09 -07:00 committed by David Gibson
parent 56f6843921
commit 0f3110fa67
3 changed files with 23 additions and 1 deletions
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18
target/ppc/excp_helper.c
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@ -22,7 +22,7 @@
#include "exec/helper-proto.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
#include "internal.h"
#include "helper_regs.h"
//#define DEBUG_OP
@ -1198,3 +1198,19 @@ void helper_book3s_msgsnd(target_ulong rb)
qemu_mutex_unlock_iothread();
}
#endif
void ppc_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr)
{
CPUPPCState *env = cs->env_ptr;
uint32_t insn;
/* Restore state and reload the insn we executed, for filling in DSISR. */
cpu_restore_state(cs, retaddr, true);
insn = cpu_ldl_code(env, env->nip);
cs->exception_index = POWERPC_EXCP_ALIGN;
env->error_code = insn & 0x03FF0000;
cpu_loop_exit(cs);
}

5
target/ppc/internal.h
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@ -252,4 +252,9 @@ static inline void putVSR(int n, ppc_vsr_t *vsr, CPUPPCState *env)
void helper_compute_fprf_float16(CPUPPCState *env, float16 arg);
void helper_compute_fprf_float32(CPUPPCState *env, float32 arg);
void helper_compute_fprf_float128(CPUPPCState *env, float128 arg);
/* Raise a data fault alignment exception for the specified virtual address */
void ppc_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
#endif /* PPC_INTERNAL_H */

1
target/ppc/translate_init.inc.c
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@ -10457,6 +10457,7 @@ static void ppc_cpu_class_init(ObjectClass *oc, void *data)
cc->set_pc = ppc_cpu_set_pc;
cc->gdb_read_register = ppc_cpu_gdb_read_register;
cc->gdb_write_register = ppc_cpu_gdb_write_register;
cc->do_unaligned_access = ppc_cpu_do_unaligned_access;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = ppc_cpu_handle_mmu_fault;
#else