x86: signal: cosmetic unification of restore_sigcontext()
Impact: cleanup
Make restore_sigcontext() the same.
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index d6dd057..85a0d37 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -149,14 +149,36 @@
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
+#ifdef CONFIG_X86_32
GET_SEG(gs);
COPY_SEG(fs);
COPY_SEG(es);
COPY_SEG(ds);
+#endif /* CONFIG_X86_32 */
+
COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
COPY(dx); COPY(cx); COPY(ip);
+
+#ifdef CONFIG_X86_64
+ COPY(r8);
+ COPY(r9);
+ COPY(r10);
+ COPY(r11);
+ COPY(r12);
+ COPY(r13);
+ COPY(r14);
+ COPY(r15);
+#endif /* CONFIG_X86_64 */
+
+#ifdef CONFIG_X86_32
COPY_SEG_STRICT(cs);
COPY_SEG_STRICT(ss);
+#else /* !CONFIG_X86_32 */
+ /* Kernel saves and restores only the CS segment register on signals,
+ * which is the bare minimum needed to allow mixed 32/64-bit code.
+ * App's signal handler can save/restore other segments if needed. */
+ COPY_SEG_STRICT(cs);
+#endif /* CONFIG_X86_32 */
err |= __get_user(tmpflags, &sc->flags);
regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);