[PATCH] uml: separate libc-dependent helper code

The serial UML OS-abstraction layer patch (um/kernel dir).

This moves all systemcalls from helper.c file under os-Linux dir
Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/drivers/chan_user.c

@@ -16,7 +16,6 @@
 #include "user_util.h"
 #include "chan_user.h"
 #include "user.h"
-#include "helper.h"
 #include "os.h"
 #include "choose-mode.h"
 #include "mode.h"

arch/um/drivers/harddog_kern.c

@@ -46,7 +46,6 @@
 #include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <asm/uaccess.h>
-#include "helper.h"
 #include "mconsole.h"
 
 MODULE_LICENSE("GPL");

arch/um/drivers/harddog_user.c

@@ -8,7 +8,6 @@
 #include <errno.h>
 #include "user_util.h"
 #include "user.h"
-#include "helper.h"
 #include "mconsole.h"
 #include "os.h"
 #include "choose-mode.h"

arch/um/drivers/net_user.c

@@ -16,7 +16,6 @@
 #include "user_util.h"
 #include "kern_util.h"
 #include "net_user.h"
-#include "helper.h"
 #include "os.h"
 
 int tap_open_common(void *dev, char *gate_addr)

arch/um/drivers/port_user.c

@@ -18,7 +18,6 @@
 #include "user.h"
 #include "chan_user.h"
 #include "port.h"
-#include "helper.h"
 #include "os.h"
 
 struct port_chan {

arch/um/drivers/slip_user.c

@@ -14,7 +14,6 @@
 #include "net_user.h"
 #include "slip.h"
 #include "slip_common.h"
-#include "helper.h"
 #include "os.h"
 
 void slip_user_init(void *data, void *dev)

arch/um/drivers/slirp_user.c

@@ -13,7 +13,6 @@
 #include "net_user.h"
 #include "slirp.h"
 #include "slip_common.h"
-#include "helper.h"
 #include "os.h"
 
 void slirp_user_init(void *data, void *dev)

arch/um/drivers/xterm.c

@@ -14,7 +14,6 @@
 #include <sys/socket.h>
 #include "kern_util.h"
 #include "chan_user.h"
-#include "helper.h"
 #include "user_util.h"
 #include "user.h"
 #include "os.h"

arch/um/include/helper.h

-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __HELPER_H__
-#define __HELPER_H__
-
-extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
-		      unsigned long *stack_out);
-extern int run_helper_thread(int (*proc)(void *), void *arg, 
-			     unsigned int flags, unsigned long *stack_out,
-			     int stack_order);
-extern int helper_wait(int pid);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */

arch/um/include/os.h

@@ -205,6 +205,14 @@ extern unsigned long __do_user_copy(void *to, const void *from, int n,
 				    void (*op)(void *to, const void *from,
 					       int n), int *faulted_out);
 
+/* helper.c */
+extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
+		      unsigned long *stack_out);
+extern int run_helper_thread(int (*proc)(void *), void *arg,
+			     unsigned int flags, unsigned long *stack_out,
+			     int stack_order);
+extern int helper_wait(int pid);
+
 #endif
 
 /*

arch/um/kernel/Makefile

@@ -7,7 +7,7 @@ extra-y := vmlinux.lds
 clean-files :=
 
 obj-y = config.o exec_kern.o exitcode.o \
-	helper.o init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \
+	init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \
 	process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \
 	signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \
 	time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o \
@@ -24,8 +24,7 @@ obj-$(CONFIG_MODE_SKAS) += skas/
 
 user-objs-$(CONFIG_TTY_LOG) += tty_log.o
 
-USER_OBJS := $(user-objs-y) config.o helper.o time.o tty_log.o umid.o \
-	user_util.o
+USER_OBJS := $(user-objs-y) config.o time.o tty_log.o umid.o user_util.o
 
 include arch/um/scripts/Makefile.rules
 

arch/um/kernel/ksyms.c

@@ -20,7 +20,6 @@
 #include "user_util.h"
 #include "mem_user.h"
 #include "os.h"
-#include "helper.h"
 
 EXPORT_SYMBOL(stop);
 EXPORT_SYMBOL(uml_physmem);

arch/um/kernel/sigio_user.c

@@ -18,7 +18,6 @@
 #include "kern_util.h"
 #include "user_util.h"
 #include "sigio.h"
-#include "helper.h"
 #include "os.h"
 
 /* Changed during early boot */

arch/um/kernel/user_util.c

@@ -27,7 +27,6 @@
 #include "user.h"
 #include "mem_user.h"
 #include "init.h"
-#include "helper.h"
 #include "ptrace_user.h"
 #include "uml-config.h"
 

arch/um/os-Linux/Makefile

@@ -3,10 +3,11 @@
 # Licensed under the GPL
 #
 
-obj-y = aio.o elf_aux.o file.o main.o mem.o process.o signal.o start_up.o \
-	time.o tt.o tty.o uaccess.o user_syms.o drivers/ sys-$(SUBARCH)/
+obj-y = aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
+	start_up.o time.o tt.o tty.o uaccess.o user_syms.o drivers/ \
+	sys-$(SUBARCH)/
 
-USER_OBJS := aio.o elf_aux.o file.o main.o mem.o process.o signal.o \
+USER_OBJS := aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
 	start_up.o time.o tt.o tty.o uaccess.o
 
 elf_aux.o: $(ARCH_DIR)/kernel-offsets.h

arch/um/os-Linux/aio.c

@@ -10,7 +10,6 @@
 #include <sched.h>
 #include <sys/syscall.h>
 #include "os.h"
-#include "helper.h"
 #include "aio.h"
 #include "init.h"
 #include "user.h"

arch/um/os-Linux/drivers/ethertap_user.c

@@ -19,7 +19,6 @@
 #include "user_util.h"
 #include "net_user.h"
 #include "etap.h"
-#include "helper.h"
 #include "os.h"
 
 #define MAX_PACKET ETH_MAX_PACKET

arch/um/os-Linux/drivers/tuntap_user.c

@@ -20,7 +20,6 @@
 #include "kern_util.h"
 #include "user_util.h"
 #include "user.h"
-#include "helper.h"
 #include "os.h"
 
 #define MAX_PACKET ETH_MAX_PACKET

arch/um/kernel/helper.c → arch/um/os-Linux/helper.c

-/* 
+/*
  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
@@ -13,7 +13,6 @@
 #include "user.h"
 #include "kern_util.h"
 #include "user_util.h"
-#include "helper.h"
 #include "os.h"
 
 struct helper_data {
@@ -46,7 +45,7 @@ static int helper_child(void *arg)
 	errval = errno;
 	printk("execvp of '%s' failed - errno = %d\n", argv[0], errno);
 	os_write_file(data->fd, &errval, sizeof(errval));
-	os_kill_process(os_getpid(), 0);
+	kill(os_getpid(), SIGKILL);
 	return(0);
 }
 
@@ -90,7 +89,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
 		goto out_close;
 	}
 
-	os_close_file(fds[1]);
+	close(fds[1]);
 	fds[1] = -1;
 
 	/*Read the errno value from the child.*/
@@ -98,7 +97,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
 	if(n < 0){
 		printk("run_helper : read on pipe failed, ret = %d\n", -n);
 		ret = n;
-		os_kill_process(pid, 1);
+		kill(pid, SIGKILL);
+		CATCH_EINTR(waitpid(pid, NULL, 0));
 	}
 	else if(n != 0){
 		CATCH_EINTR(n = waitpid(pid, NULL, 0));
@@ -109,8 +109,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
 
 out_close:
 	if (fds[1] != -1)
-		os_close_file(fds[1]);
-	os_close_file(fds[0]);
+		close(fds[1]);
+	close(fds[0]);
 out_free:
 	if(stack_out == NULL)
 		free_stack(stack, 0);
@@ -118,7 +118,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
 	return(ret);
 }
 
-int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, 
+int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
 		      unsigned long *stack_out, int stack_order)
 {
 	unsigned long stack, sp;
@@ -131,7 +131,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
 	pid = clone(proc, (void *) sp, flags | SIGCHLD, arg);
 	if(pid < 0){
 		err = -errno;
-		printk("run_helper_thread : clone failed, errno = %d\n", 
+		printk("run_helper_thread : clone failed, errno = %d\n",
 		       errno);
 		return err;
 	}