compel: plugins,std -- Add prologue.S

The prologue includes routines needed for parasite blob to work
and is always included with the std plugin.
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/arch/x86/plugins/include/asm/linkage.h

-../../../../../../criu/arch/x86/include/asm/linkage.h
\ No newline at end of file

compel/arch/x86/plugins/std/prologue.S

+#include "common/asm/linkage.h"
+#include "asm/prologue.h"
+
+#include "uapi/std/syscall-codes.h"
+
+	.section .compel.prologue.text, "ax"
+ENTRY(__export_std_prologue_start)
+	push	%rsp
+
+	leaq	__export_std_prologue_init_args(%rip), %rdi
+	movq	__export_std_plugin_begin(%rip), %rsi
+	movq	__export_std_plugin_size(%rip), %rdx
+	call	__export_std_compel_start
+
+do_rt_sigreturn:
+	leaq	__export_std_prologue_sigframe(%rip), %rax
+	addq	$8, %rax
+	movq	%rax, %rsp			# we can't use sys_rt_sigreturn here
+	mov	$__NR_rt_sigreturn, %eax	# because we're adjusting stack
+	syscall
+
+GLOBAL(__export_std_prologue_init_args)
+	.space PROLOGUE_INIT_ARGS_SIZE, 0
+
+GLOBAL(__export_std_plugin_begin)
+	.space 8, 0
+GLOBAL(__export_std_plugin_size)
+	.space 8, 0
+
+	.align 64
+GLOBAL(__export_std_prologue_sigframe)
+	.space PROLOGUE_SGFRAME_SIZE, 0
+END(__export_std_prologue_start)

compel/arch/x86/plugins/std/syscalls/syscall-common-x86-32.S

-#include "asm/linkage.h"
+#include "common/asm/linkage.h"
 
 #define SYSCALL(name, opcode)		\
 	ENTRY(name);			\

compel/arch/x86/plugins/std/syscalls/syscall-common-x86-64.S

-#include "asm/linkage.h"
+#include "common/asm/linkage.h"
 
 #define SYSCALL(name, opcode)		\
 	ENTRY(name);			\

compel/plugins/Makefile

@@ -8,6 +8,7 @@ ccflags-y		+= -iquote $(SRC_DIR)/compel/include
 # General compel/plugins includes
 ccflags-y		+= -iquote $(obj)/include
 ccflags-y		+= -iquote $(obj)/include/uapi
+asflags-y		+= -iquote $(obj)/include
 asflags-y		+= -iquote $(obj)/include/uapi
 
 # Arch compel/plugins includes
@@ -27,6 +28,7 @@ std-obj-y		+= std/std.o
 std-obj-y		+= std/string.o
 std-obj-y		+= ./$(ARCH_DIR)/std/syscalls-64.o
 std-obj-y		+= ./$(ARCH_DIR)/std/call32.o
+std-obj-y		+= ./$(ARCH_DIR)/std/prologue.o
 
 sys-proto-generic	:= $(obj)/include/uapi/std/syscall.h
 sys-codes-generic	:= $(obj)/include/uapi/std/syscall-codes.h