part of Issue#994

mcexec: open syscall moves to arch_dep
do_fork: don't use __NR_fork. use __NR_clone
vfork: moves to arch_dep

executer/user/arch/arm64/Makefile.in

@@ -9,12 +9,15 @@ LIBS=@LIBS@
 
 all: $(TARGET)
 
-../../libmcexec.a: archdep.o
-	$(AR) cr ../../libmcexec.a archdep.o 
+../../libmcexec.a: archdep.o arch_syscall.o
+	$(AR) cr ../../libmcexec.a archdep.o arch_syscall.o
 
 archdep.o: archdep.S
 	$(CC) -c -I${KDIR} $(CFLAGS) $(EXTRA_CFLAGS) -fPIE -pie -pthread $<
 
+arch_syscall.o: arch_syscall.c
+	$(CC) -c -I${KDIR} $(CFLAGS) $(EXTRA_CFLAGS) -fPIE -pie -pthread $<
+
 clean:
 	$(RM) $(TARGET) *.o
 

executer/user/arch/arm64/arch_syscall.c

@@ -0,0 +1,7 @@
+struct syscall_wait_desc;
+
+int
+archdep_syscall(struct syscall_wait_desc *w, long *ret)
+{
+	return -1;
+}

executer/user/arch/x86_64/Makefile.in

@@ -9,12 +9,15 @@ LIBS=@LIBS@
 
 all: $(TARGET)
 
-../../libmcexec.a: archdep.o
-	$(AR) cr ../../libmcexec.a archdep.o 
+../../libmcexec.a: archdep.o arch_syscall.o
+	$(AR) cr ../../libmcexec.a archdep.o arch_syscall.o
 
 archdep.o: archdep.S
 	$(CC) -c -I${KDIR} $(CFLAGS) $(EXTRA_CFLAGS) -fPIE -pie -pthread $<
 
+arch_syscall.o: arch_syscall.c
+	$(CC) -c -I${KDIR} $(CFLAGS) $(EXTRA_CFLAGS) -fPIE -pie -pthread $<
+
 clean:
 	$(RM) $(TARGET) *.o
 

executer/user/arch/x86_64/arch_syscall.c

@@ -0,0 +1,63 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <sys/syscall.h>
+#include <elf.h>
+#include <dirent.h>
+#include "../../../include/uprotocol.h"
+#include "../../archdep.h"
+
+//#define DEBUG
+#ifndef DEBUG
+#define __dprint(msg, ...)
+#define __dprintf(arg, ...)
+#define __eprint(msg, ...)
+#define __eprintf(format, ...)
+#else
+#define __dprint(msg, ...)  {printf("%s: " msg, __FUNCTION__);fflush(stdout);}
+#define __dprintf(format, ...)  {printf("%s: " format, __FUNCTION__, \
+					__VA_ARGS__);fflush(stdout);}
+#define __eprint(msg, ...)  {fprintf(stderr, "%s: " msg, __FUNCTION__);\
+					fflush(stderr);}
+#define __eprintf(format, ...)  {fprintf(stderr, "%s: " format, __FUNCTION__, \
+					__VA_ARGS__);fflush(stderr);}
+#endif
+
+extern char *chgpath(char *, char *);
+extern long do_strncpy_from_user(int, void *, void *, unsigned long);
+extern int fd;
+
+#define SET_ERR(ret) if (ret == -1) ret = -errno
+
+int
+archdep_syscall(struct syscall_wait_desc *w, long *ret)
+{
+	char *fn;
+	char pathbuf[PATH_MAX];
+	char tmpbuf[PATH_MAX];
+
+	switch (w->sr.number) {
+		case __NR_open:
+			*ret = do_strncpy_from_user(fd, pathbuf,
+			                       (void *)w->sr.args[0], PATH_MAX);
+			if (*ret >= PATH_MAX) {
+				*ret = -ENAMETOOLONG;
+			}
+			if (ret < 0) {
+				return 0;
+			}
+			__dprintf("open: %s\n", pathbuf);
+
+			fn = chgpath(pathbuf, tmpbuf);
+
+			*ret = open(fn, w->sr.args[1], w->sr.args[2]);
+			SET_ERR(*ret);
+			return 0;
+	}
+	return -1;
+}