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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2016-07-27 16:56:38 +1000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-09-07 12:40:10 +1000 |
| commit | 72073dcce0ad1e84b866e45bc60ccf459aa9fcd4 (patch) | |
| tree | cad32118f4716bf9a2d19f574ada0542a31eb14c | |
| parent | 8c8966e2188ade13c4ab9d3f8f4b12c99be0ade4 (diff) | |
| download | qemu-72073dcce0ad1e84b866e45bc60ccf459aa9fcd4.zip qemu-72073dcce0ad1e84b866e45bc60ccf459aa9fcd4.tar.gz qemu-72073dcce0ad1e84b866e45bc60ccf459aa9fcd4.tar.bz2 | |
ppc: Don't update NIP on conditional trap instructions
This is no longer necessary as the helpers will properly retrieve
the return address when needed.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| -rw-r--r-- | target-ppc/excp_helper.c | 6 | ||||
| -rw-r--r-- | target-ppc/translate.c | 8 |
2 files changed, 4 insertions, 10 deletions
diff --git a/target-ppc/excp_helper.c b/target-ppc/excp_helper.c index d31eece..882d529 100644 --- a/target-ppc/excp_helper.c +++ b/target-ppc/excp_helper.c @@ -1031,7 +1031,8 @@ void helper_tw(CPUPPCState *env, target_ulong arg1, target_ulong arg2, ((int32_t)arg1 == (int32_t)arg2 && (flags & 0x04)) || ((uint32_t)arg1 < (uint32_t)arg2 && (flags & 0x02)) || ((uint32_t)arg1 > (uint32_t)arg2 && (flags & 0x01))))) { - raise_exception_err(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_TRAP); + raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, + POWERPC_EXCP_TRAP, GETPC()); } } @@ -1044,7 +1045,8 @@ void helper_td(CPUPPCState *env, target_ulong arg1, target_ulong arg2, ((int64_t)arg1 == (int64_t)arg2 && (flags & 0x04)) || ((uint64_t)arg1 < (uint64_t)arg2 && (flags & 0x02)) || ((uint64_t)arg1 > (uint64_t)arg2 && (flags & 0x01))))) { - raise_exception_err(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_TRAP); + raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, + POWERPC_EXCP_TRAP, GETPC()); } } #endif diff --git a/target-ppc/translate.c b/target-ppc/translate.c index f75cdc6..93cd98c 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -3580,8 +3580,6 @@ static void gen_sc(DisasContext *ctx) static void gen_tw(DisasContext *ctx) { TCGv_i32 t0 = tcg_const_i32(TO(ctx->opcode)); - /* Update the nip since this might generate a trap exception */ - gen_update_nip(ctx, ctx->nip - 4); gen_helper_tw(cpu_env, cpu_gpr[rA(ctx->opcode)], cpu_gpr[rB(ctx->opcode)], t0); tcg_temp_free_i32(t0); @@ -3592,8 +3590,6 @@ static void gen_twi(DisasContext *ctx) { TCGv t0 = tcg_const_tl(SIMM(ctx->opcode)); TCGv_i32 t1 = tcg_const_i32(TO(ctx->opcode)); - /* Update the nip since this might generate a trap exception */ - gen_update_nip(ctx, ctx->nip - 4); gen_helper_tw(cpu_env, cpu_gpr[rA(ctx->opcode)], t0, t1); tcg_temp_free(t0); tcg_temp_free_i32(t1); @@ -3604,8 +3600,6 @@ static void gen_twi(DisasContext *ctx) static void gen_td(DisasContext *ctx) { TCGv_i32 t0 = tcg_const_i32(TO(ctx->opcode)); - /* Update the nip since this might generate a trap exception */ - gen_update_nip(ctx, ctx->nip - 4); gen_helper_td(cpu_env, cpu_gpr[rA(ctx->opcode)], cpu_gpr[rB(ctx->opcode)], t0); tcg_temp_free_i32(t0); @@ -3616,8 +3610,6 @@ static void gen_tdi(DisasContext *ctx) { TCGv t0 = tcg_const_tl(SIMM(ctx->opcode)); TCGv_i32 t1 = tcg_const_i32(TO(ctx->opcode)); - /* Update the nip since this might generate a trap exception */ - gen_update_nip(ctx, ctx->nip - 4); gen_helper_td(cpu_env, cpu_gpr[rA(ctx->opcode)], t0, t1); tcg_temp_free(t0); tcg_temp_free_i32(t1); |