diff options
| author | Sergey Fedorov <serge.fdrv@gmail.com> | 2016-04-09 01:00:23 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-05-12 14:06:42 -1000 |
| commit | 90aa39a1cc4837360889f0e033ca25cc82100308 (patch) | |
| tree | b8f857f456fec4ecd5b5931f41c7b17b52a353eb /target-lm32 | |
| parent | 5b053a4a28278bca606eeff7d1c0730df1b047e9 (diff) | |
| download | qemu-90aa39a1cc4837360889f0e033ca25cc82100308.tar.gz | |
tcg: Allow goto_tb to any target PC in user mode
In user mode, there's only a static address translation, TBs are always
invalidated properly and direct jumps are reset when mapping change.
Thus the destination address is always valid for direct jumps and
there's no need to restrict it to the pages the TB resides in.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Blue Swirl <blauwirbel@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-lm32')
| -rw-r--r-- | target-lm32/translate.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/target-lm32/translate.c b/target-lm32/translate.c index 256a51f849..dd972f5b8c 100644 --- a/target-lm32/translate.c +++ b/target-lm32/translate.c @@ -133,16 +133,25 @@ static inline void t_gen_illegal_insn(DisasContext *dc) gen_helper_ill(cpu_env); } -static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest) +static inline bool use_goto_tb(DisasContext *dc, target_ulong dest) { - TranslationBlock *tb; + if (unlikely(dc->singlestep_enabled)) { + return false; + } + +#ifndef CONFIG_USER_ONLY + return (dc->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK); +#else + return true; +#endif +} - tb = dc->tb; - if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) && - likely(!dc->singlestep_enabled)) { +static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest) +{ + if (use_goto_tb(dc, dest)) { tcg_gen_goto_tb(n); tcg_gen_movi_tl(cpu_pc, dest); - tcg_gen_exit_tb((uintptr_t)tb + n); + tcg_gen_exit_tb((uintptr_t)dc->tb + n); } else { tcg_gen_movi_tl(cpu_pc, dest); if (dc->singlestep_enabled) { |