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target/arm: Define arm_cpu_do_unaligned_access for user-only 

Use the same code as system mode, so that we generate the same
exception + syndrome for the unaligned access.

For the moment, if MTE is enabled so that this path is reachable,
this would generate a SIGSEGV in the user-only cpu_loop.  Decoding
the syndrome to produce the proper SIGBUS will be done later.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-15-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-06-25 20:31:12 -07:00 committed by Peter Maydell
parent dad3015f55
commit 0d1762e931
2 changed files with 3 additions and 3 deletions
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2
target/arm/cpu.c
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@ -2169,8 +2169,8 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
cc->tlb_fill = arm_cpu_tlb_fill;
cc->debug_excp_handler = arm_debug_excp_handler;
cc->debug_check_watchpoint = arm_debug_check_watchpoint;
#if !defined(CONFIG_USER_ONLY)
cc->do_unaligned_access = arm_cpu_do_unaligned_access;
#if !defined(CONFIG_USER_ONLY)
cc->do_transaction_failed = arm_cpu_do_transaction_failed;
cc->adjust_watchpoint_address = arm_adjust_watchpoint_address;
#endif /* CONFIG_TCG && !CONFIG_USER_ONLY */

4
target/arm/tlb_helper.c
View File

@ -10,8 +10,6 @@
#include "internals.h"
#include "exec/exec-all.h"
#if !defined(CONFIG_USER_ONLY)
static inline uint32_t merge_syn_data_abort(uint32_t template_syn,
unsigned int target_el,
bool same_el, bool ea,
@ -122,6 +120,8 @@ void arm_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
arm_deliver_fault(cpu, vaddr, access_type, mmu_idx, &fi);
}
#if !defined(CONFIG_USER_ONLY)
/*
* arm_cpu_do_transaction_failed: handle a memory system error response
* (eg "no device/memory present at address") by raising an external abort