From: Timothy E Baldwin <t.e.baldwi...@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.baldwi...@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.mayd...@linaro.org> Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- 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) */ -- 1.9.1
