diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2019-02-05 16:52:37 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-02-05 16:52:37 +0000 |
| commit | 51bf0d7aa91a9d4e2563240a42e6cb705cef84aa (patch) | |
| tree | 4072b59c5ac2c290bd577f62a77bb62e32461a44 /target/arm/translate.h | |
| parent | 1bafc2ba7e6bfe89fff3503fdac8db39c973de48 (diff) | |
target/arm: Default handling of BTYPE during translation
The branch target exception for guarded pages has high priority,
and only 8 instructions are valid for that case. Perform this
check before doing any other decode.
Clear BTYPE after all insns that neither set BTYPE nor exit via
exception (DISAS_NORETURN).
Not yet handled are insns that exit via DISAS_NORETURN for some
other reason, like direct branches.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190128223118.5255-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/translate.h')
| -rw-r--r-- | target/arm/translate.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/target/arm/translate.h b/target/arm/translate.h index 3d5e8bacac..f73939d7b4 100644 --- a/target/arm/translate.h +++ b/target/arm/translate.h @@ -71,8 +71,13 @@ typedef struct DisasContext { bool pauth_active; /* True with v8.5-BTI and SCTLR_ELx.BT* set. */ bool bt; - /* A copy of PSTATE.BTYPE, which will be 0 without v8.5-BTI. */ - uint8_t btype; + /* + * >= 0, a copy of PSTATE.BTYPE, which will be 0 without v8.5-BTI. + * < 0, set by the current instruction. + */ + int8_t btype; + /* True if this page is guarded. */ + bool guarded_page; /* Bottom two bits of XScale c15_cpar coprocessor access control reg */ int c15_cpar; /* TCG op of the current insn_start. */ |