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linux-user: Define TARGET_ERESTART* errno values 

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>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Timothy E Baldwin 2016-05-12 18:47:28 +01:00 committed by Riku Voipio
parent da7c8647e5
commit 14896d3281
1 changed files with 8 additions and 0 deletions
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8
linux-user/errno_defs.h
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@ -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) */