compel: plugins,std -- Implement syscalls in std plugin

And use it in CRIU directly instead:

 - move syscalls into compel/arch/ARCH/plugins/std/syscalls
 - drop old symlinks
 - no build for 32bit on x86 as expected
 - use std.built-in.o inside criu directly (compel_main stub)
 - drop syscalls on x86 criu directory, I copied them already
   in first compel commist, so we can't move them now, but
   delete in place

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

7 files changed, 63 insertions, 0 deletions

diff --git a/compel/arch/aarch64/plugins/std/syscalls/Makefile.syscalls b/compel/arch/aarch64/plugins/std/syscalls/Makefile.syscalls
new file mode 120000
index 000000000..eba4d986c
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/Makefile.syscalls
@@ -0,0 +1 @@
+../../../../arm/plugins/std/syscalls/Makefile.syscalls
\ No newline at end of file
diff --git a/compel/arch/aarch64/plugins/std/syscalls/gen-sys-exec-tbl.pl b/compel/arch/aarch64/plugins/std/syscalls/gen-sys-exec-tbl.pl
new file mode 120000
index 000000000..8d7e897ae
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/gen-sys-exec-tbl.pl
@@ -0,0 +1 @@
+../../../../arm/plugins/std/syscalls/gen-sys-exec-tbl.pl
\ No newline at end of file
diff --git a/compel/arch/aarch64/plugins/std/syscalls/gen-syscalls.pl b/compel/arch/aarch64/plugins/std/syscalls/gen-syscalls.pl
new file mode 120000
index 000000000..5c9563611
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/gen-syscalls.pl
@@ -0,0 +1 @@
+../../../../arm/plugins/std/syscalls/gen-syscalls.pl
\ No newline at end of file
diff --git a/compel/arch/aarch64/plugins/std/syscalls/syscall-aux.S b/compel/arch/aarch64/plugins/std/syscalls/syscall-aux.S
new file mode 100644
index 000000000..00ccf79c3
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/syscall-aux.S
@@ -0,0 +1,37 @@
+/**
+ * This source contains emulation of syscalls
+ * that are not implemented in the AArch64 Linux kernel
+ */
+
+ENTRY(sys_open)
+	mov x3, x2
+	mov x2, x1
+	mov x1, x0
+	mov x0, #-100
+	b   sys_openat
+END(sys_open)
+
+
+ENTRY(sys_mkdir)
+	mov x3, x2
+	mov x2, x1
+	mov x1, x0
+	mov x0, #-100
+	b   sys_mkdirat
+END(sys_mkdir)
+
+
+ENTRY(sys_rmdir)
+	mov x2, #0x200		// flags = AT_REMOVEDIR
+	mov x1, x0
+	mov x0, #-100
+	b   sys_unlinkat
+END(sys_rmdir)
+
+
+ENTRY(sys_unlink)
+	mov x2, #0		// flags = 0
+	mov x1, x0
+	mov x0, #-100
+	b   sys_unlinkat
+END(sys_unlink)
diff --git a/compel/arch/aarch64/plugins/std/syscalls/syscall-aux.h b/compel/arch/aarch64/plugins/std/syscalls/syscall-aux.h
new file mode 100644
index 000000000..6272bf3a8
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/syscall-aux.h
@@ -0,0 +1,3 @@
+#ifndef __NR_openat
+# define __NR_openat 56
+#endif
diff --git a/compel/arch/aarch64/plugins/std/syscalls/syscall-common.S b/compel/arch/aarch64/plugins/std/syscalls/syscall-common.S
new file mode 100644
index 000000000..aeb89ea88
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/syscall-common.S
@@ -0,0 +1,19 @@
+#include "common/asm/linkage.h"
+
+syscall_common:
+	svc	#0
+	ret
+
+
+.macro syscall name, nr
+	ENTRY(\name)
+		mov	x8, \nr
+		b	syscall_common
+	END(\name)
+.endm
+
+
+ENTRY(__cr_restore_rt)
+	mov	x8, __NR_rt_sigreturn
+	svc	#0
+END(__cr_restore_rt)
diff --git a/compel/arch/aarch64/plugins/std/syscalls/syscall.def b/compel/arch/aarch64/plugins/std/syscalls/syscall.def
new file mode 120000
index 000000000..ebecde3cb
--- /dev/null
+++ b/compel/arch/aarch64/plugins/std/syscalls/syscall.def
@@ -0,0 +1 @@
+../../../../arm/plugins/std/syscalls/syscall.def
\ No newline at end of file