diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2017-05-01 23:20:43 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2017-05-13 11:18:27 +0200 |
| commit | 34257c2117209573ddff290128d4192cf9bbdf23 (patch) | |
| tree | 6593fbf774d66c1d37dace6efe0e7bf00dfe47a4 /target/sh4 | |
| parent | 143021b26ffe1a468236c824003caaf4fd7d4831 (diff) | |
target/sh4: trap unaligned accesses
SH4 requires that memory accesses are naturally aligned, except for the
SH4-A movua.l instructions which can do unaligned loads.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target/sh4')
| -rw-r--r-- | target/sh4/cpu.c | 1 | ||||
| -rw-r--r-- | target/sh4/cpu.h | 4 | ||||
| -rw-r--r-- | target/sh4/op_helper.c | 16 | ||||
| -rw-r--r-- | target/sh4/translate.c | 6 |
4 files changed, 25 insertions, 2 deletions
diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c index 9a481c35dc..9da7e1ed38 100644 --- a/target/sh4/cpu.c +++ b/target/sh4/cpu.c @@ -301,6 +301,7 @@ static void superh_cpu_class_init(ObjectClass *oc, void *data) #ifdef CONFIG_USER_ONLY cc->handle_mmu_fault = superh_cpu_handle_mmu_fault; #else + cc->do_unaligned_access = superh_cpu_do_unaligned_access; cc->get_phys_page_debug = superh_cpu_get_phys_page_debug; #endif cc->disas_set_info = superh_cpu_disas_set_info; diff --git a/target/sh4/cpu.h b/target/sh4/cpu.h index faab3012f9..6c07c6b24b 100644 --- a/target/sh4/cpu.h +++ b/target/sh4/cpu.h @@ -24,6 +24,7 @@ #include "cpu-qom.h" #define TARGET_LONG_BITS 32 +#define ALIGNED_ONLY /* CPU Subtypes */ #define SH_CPU_SH7750 (1 << 0) @@ -215,6 +216,9 @@ void superh_cpu_dump_state(CPUState *cpu, FILE *f, hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); int superh_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); +void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, + MMUAccessType access_type, + int mmu_idx, uintptr_t retaddr); void sh4_translate_init(void); SuperHCPU *cpu_sh4_init(const char *cpu_model); diff --git a/target/sh4/op_helper.c b/target/sh4/op_helper.c index 684d3f3758..fa238c660e 100644 --- a/target/sh4/op_helper.c +++ b/target/sh4/op_helper.c @@ -24,6 +24,22 @@ #ifndef CONFIG_USER_ONLY +void superh_cpu_do_unaligned_access(CPUState *cs, vaddr addr, + MMUAccessType access_type, + int mmu_idx, uintptr_t retaddr) +{ + switch (access_type) { + case MMU_INST_FETCH: + case MMU_DATA_LOAD: + cs->exception_index = 0x0e0; + break; + case MMU_DATA_STORE: + cs->exception_index = 0x100; + break; + } + cpu_loop_exit_restore(cs, retaddr); +} + void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type, int mmu_idx, uintptr_t retaddr) { diff --git a/target/sh4/translate.c b/target/sh4/translate.c index 4bb9105865..0bc2f9ff19 100644 --- a/target/sh4/translate.c +++ b/target/sh4/translate.c @@ -1504,14 +1504,16 @@ static void _decode_opc(DisasContext * ctx) case 0x40a9: /* movua.l @Rm,R0 */ /* Load non-boundary-aligned data */ if (ctx->features & SH_FEATURE_SH4A) { - tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx, MO_TEUL); + tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx, + MO_TEUL | MO_UNALN); return; } break; case 0x40e9: /* movua.l @Rm+,R0 */ /* Load non-boundary-aligned data */ if (ctx->features & SH_FEATURE_SH4A) { - tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx, MO_TEUL); + tcg_gen_qemu_ld_i32(REG(0), REG(B11_8), ctx->memidx, + MO_TEUL | MO_UNALN); tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4); return; } |