| Message ID | 20220811095534.241224-3-iii@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | linux-user: Fix siginfo_t contents when jumping to non-readable pages | expand |
On 8/11/22 02:55, Ilya Leoshkevich wrote: > Introduce a function that checks whether a given address is on the same > page as where disassembly started. Having it improves readability of > the following patches. > > Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/include/exec/translator.h b/include/exec/translator.h index 7db6845535..d27f8c33b6 100644 --- a/include/exec/translator.h +++ b/include/exec/translator.h @@ -187,4 +187,14 @@ FOR_EACH_TRANSLATOR_LD(GEN_TRANSLATOR_LD) #undef GEN_TRANSLATOR_LD +/* + * Return whether addr is on the same page as where disassembly started. + * Translators can use this to enforce the rule that only single-insn + * translation blocks are allowed to cross page boundaries. + */ +static inline bool is_same_page(DisasContextBase *db, target_ulong addr) +{ + return ((addr ^ db->pc_first) & TARGET_PAGE_MASK) == 0; +} + #endif /* EXEC__TRANSLATOR_H */
Introduce a function that checks whether a given address is on the same page as where disassembly started. Having it improves readability of the following patches. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> --- include/exec/translator.h | 10 ++++++++++ 1 file changed, 10 insertions(+)