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-rw-r--r--linux-user/errno_defs.h9
-rw-r--r--linux-user/mips/target_syscall.h4
-rw-r--r--linux-user/mips64/target_syscall.h4
-rw-r--r--linux-user/ppc/target_syscall.h2
4 files changed, 9 insertions, 10 deletions
diff --git a/linux-user/errno_defs.h b/linux-user/errno_defs.h
index b7a8c9f..65522c4 100644
--- a/linux-user/errno_defs.h
+++ b/linux-user/errno_defs.h
@@ -147,3 +147,12 @@
* kernel uses for the same purpose.
*/
#define TARGET_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 TARGET_QEMU_ESIGRETURN 513 /* Return from signal */
diff --git a/linux-user/mips/target_syscall.h b/linux-user/mips/target_syscall.h
index 68db160..e8e305c 100644
--- a/linux-user/mips/target_syscall.h
+++ b/linux-user/mips/target_syscall.h
@@ -222,10 +222,6 @@ struct target_pt_regs {
#define TARGET_ENOTRECOVERABLE 166 /* State not recoverable */
-
-/* Nasty hack: define a fake errno value for use by sigreturn. */
-#define TARGET_QEMU_ESIGRETURN 255
-
#define UNAME_MACHINE "mips"
#define UNAME_MINIMUM_RELEASE "2.6.32"
diff --git a/linux-user/mips64/target_syscall.h b/linux-user/mips64/target_syscall.h
index 0e0c2d2..5789e86 100644
--- a/linux-user/mips64/target_syscall.h
+++ b/linux-user/mips64/target_syscall.h
@@ -219,10 +219,6 @@ struct target_pt_regs {
#define TARGET_ENOTRECOVERABLE 166 /* State not recoverable */
-
-/* Nasty hack: define a fake errno value for use by sigreturn. */
-#define TARGET_QEMU_ESIGRETURN 255
-
#define UNAME_MACHINE "mips64"
#define UNAME_MINIMUM_RELEASE "2.6.32"
diff --git a/linux-user/ppc/target_syscall.h b/linux-user/ppc/target_syscall.h
index 35cab59..7ca83c2 100644
--- a/linux-user/ppc/target_syscall.h
+++ b/linux-user/ppc/target_syscall.h
@@ -53,8 +53,6 @@ struct target_revectored_struct {
abi_ulong __map[8]; /* 256 bits */
};
-/* Nasty hack: define a fake errno value for use by sigreturn. */
-#define TARGET_QEMU_ESIGRETURN 255
/*
* flags masks