| Message ID | 1463075272-9933-5-git-send-email-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
Le 12/05/2016 à 19:47, Peter Maydell a écrit : > From: Timothy E Baldwin <T.E.Baldwin99@members.leeds.ac.uk> > > Define TARGET_ERESTARTSYS; like the kernel, we will use this to > indicate that a guest system call should be restarted. We use > the same value the kernel does for this, 512. > > Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk> > [PMM: split out from the patch which moves and renumbers > TARGET_QEMU_ESIGRETURN, add comment on usage] > Reviewed-by: Peter Maydell <peter.maydell@linaro.org> > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> > --- > linux-user/errno_defs.h | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/linux-user/errno_defs.h b/linux-user/errno_defs.h > index 8a1cf76..b7a8c9f 100644 > --- a/linux-user/errno_defs.h > +++ b/linux-user/errno_defs.h > @@ -139,3 +139,11 @@ > /* for robust mutexes */ > #define TARGET_EOWNERDEAD 130 /* Owner died */ > #define TARGET_ENOTRECOVERABLE 131 /* State not recoverable */ > + > +/* QEMU internal, not visible to the guest. This is returned when a > + * system call should be restarted, to tell the main loop that it > + * should wind the guest PC backwards so it will re-execute the syscall > + * after handling any pending signals. They match with the ones the guest > + * kernel uses for the same purpose. > + */ > +#define TARGET_ERESTARTSYS 512 /* Restart system call (if SA_RESTART) */ >
diff --git a/linux-user/errno_defs.h b/linux-user/errno_defs.h index 8a1cf76..b7a8c9f 100644 --- a/linux-user/errno_defs.h +++ b/linux-user/errno_defs.h @@ -139,3 +139,11 @@ /* for robust mutexes */ #define TARGET_EOWNERDEAD 130 /* Owner died */ #define TARGET_ENOTRECOVERABLE 131 /* State not recoverable */ + +/* QEMU internal, not visible to the guest. This is returned when a + * system call should be restarted, to tell the main loop that it + * should wind the guest PC backwards so it will re-execute the syscall + * after handling any pending signals. They match with the ones the guest + * kernel uses for the same purpose. + */ +#define TARGET_ERESTARTSYS 512 /* Restart system call (if SA_RESTART) */