diff options
| -rw-r--r-- | target-alpha/translate.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/target-alpha/translate.c b/target-alpha/translate.c index f172670098..309dea6ff0 100644 --- a/target-alpha/translate.c +++ b/target-alpha/translate.c @@ -379,13 +379,26 @@ static ExitStatus gen_store_conditional(DisasContext *ctx, int ra, int rb, #endif } -static int use_goto_tb(DisasContext *ctx, uint64_t dest) +static bool in_superpage(DisasContext *ctx, int64_t addr) { - /* Check for the dest on the same page as the start of the TB. We - also want to suppress goto_tb in the case of single-steping and IO. */ - return (((ctx->tb->pc ^ dest) & TARGET_PAGE_MASK) == 0 - && !ctx->singlestep_enabled - && !(ctx->tb->cflags & CF_LAST_IO)); + return ((ctx->tb->flags & TB_FLAGS_USER_MODE) == 0 + && addr < 0 + && ((addr >> 41) & 3) == 2 + && addr >> TARGET_VIRT_ADDR_SPACE_BITS == addr >> 63); +} + +static bool use_goto_tb(DisasContext *ctx, uint64_t dest) +{ + /* Suppress goto_tb in the case of single-steping and IO. */ + if (ctx->singlestep_enabled || (ctx->tb->cflags & CF_LAST_IO)) { + return false; + } + /* If the destination is in the superpage, the page perms can't change. */ + if (in_superpage(ctx, dest)) { + return true; + } + /* Check for the dest on the same page as the start of the TB. */ + return ((ctx->tb->pc ^ dest) & TARGET_PAGE_MASK) == 0; } static ExitStatus gen_bdirect(DisasContext *ctx, int ra, int32_t disp) @@ -3431,6 +3444,7 @@ static inline void gen_intermediate_code_internal(AlphaCPU *cpu, CPUAlphaState *env = &cpu->env; DisasContext ctx, *ctxp = &ctx; target_ulong pc_start; + target_ulong pc_mask; uint32_t insn; uint16_t *gen_opc_end; CPUBreakpoint *bp; @@ -3460,8 +3474,15 @@ static inline void gen_intermediate_code_internal(AlphaCPU *cpu, num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; - if (max_insns == 0) + if (max_insns == 0) { max_insns = CF_COUNT_MASK; + } + + if (in_superpage(&ctx, pc_start)) { + pc_mask = (1ULL << 41) - 1; + } else { + pc_mask = ~TARGET_PAGE_MASK; + } gen_tb_start(); do { @@ -3499,7 +3520,7 @@ static inline void gen_intermediate_code_internal(AlphaCPU *cpu, /* If we reach a page boundary, are single stepping, or exhaust instruction count, stop generation. */ if (ret == NO_EXIT - && ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0 + && ((ctx.pc & pc_mask) == 0 || tcg_ctx.gen_opc_ptr >= gen_opc_end || num_insns >= max_insns || singlestep |