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linux-user: Create special-errno.h

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Pull the two internal errno used by qemu internally into their own
header file.  This includes the one define required by safe-syscall.S.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-11-17 15:46:05 +01:00
parent 57a0c9384c
commit 5da4063f64
6 changed files with 37 additions and 18 deletions
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17
linux-user/generic/target_errno_defs.h
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@ -147,21 +147,4 @@
#define TARGET_ERFKILL 132 /* Operation not possible due to RF-kill */
#define TARGET_EHWPOISON 133 /* Memory page has hardware error */
/* 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 QEMU_ERESTARTSYS 512 /* Restart system call (if SA_RESTART) */
/* QEMU internal, not visible to the guest. This is returned by the
* do_sigreturn() code after a successful sigreturn syscall, to indicate
* that it has correctly set the guest registers and so the main loop
* should not touch them. We use the value the guest would use for
* ERESTART_NOINTR (which is kernel internal) to guarantee that we won't
* clash with a valid guest errno now or in the future.
*/
#define QEMU_ESIGRETURN 513 /* Return from signal */
#endif