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authorJeff Dike <jdike@addtoit.com>2005-11-07 00:58:51 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:31 -0800
commitff5c6ff54215fe284e515032878111de5d8a5ce1 (patch)
treeecf5e2eaacc9f45f5227b50d8bfaaf82e15b9647 /arch/um/kernel
parent52c653b3bed323df9006c06cdfb4548ec44b3109 (diff)
[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>
Diffstat (limited to 'arch/um/kernel')
-rw-r--r--arch/um/kernel/Makefile5
-rw-r--r--arch/um/kernel/helper.c165
-rw-r--r--arch/um/kernel/ksyms.c1
-rw-r--r--arch/um/kernel/sigio_user.c1
-rw-r--r--arch/um/kernel/user_util.c1
5 files changed, 2 insertions, 171 deletions
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index f9858583863a..3de9d21e36bf 100644
--- a/arch/um/kernel/Makefile
+++ b/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
diff --git a/arch/um/kernel/helper.c b/arch/um/kernel/helper.c
deleted file mode 100644
index 33fb0bd3b11a..000000000000
--- a/arch/um/kernel/helper.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <sched.h>
-#include <sys/signal.h>
-#include <sys/wait.h>
-#include "user.h"
-#include "kern_util.h"
-#include "user_util.h"
-#include "helper.h"
-#include "os.h"
-
-struct helper_data {
- void (*pre_exec)(void*);
- void *pre_data;
- char **argv;
- int fd;
-};
-
-/* Debugging aid, changed only from gdb */
-int helper_pause = 0;
-
-static void helper_hup(int sig)
-{
-}
-
-static int helper_child(void *arg)
-{
- struct helper_data *data = arg;
- char **argv = data->argv;
- int errval;
-
- if(helper_pause){
- signal(SIGHUP, helper_hup);
- pause();
- }
- if(data->pre_exec != NULL)
- (*data->pre_exec)(data->pre_data);
- execvp(argv[0], argv);
- 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);
- return(0);
-}
-
-/* Returns either the pid of the child process we run or -E* on failure.
- * XXX The alloc_stack here breaks if this is called in the tracing thread */
-int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
- unsigned long *stack_out)
-{
- struct helper_data data;
- unsigned long stack, sp;
- int pid, fds[2], ret, n;
-
- if((stack_out != NULL) && (*stack_out != 0))
- stack = *stack_out;
- else stack = alloc_stack(0, um_in_interrupt());
- if(stack == 0)
- return(-ENOMEM);
-
- ret = os_pipe(fds, 1, 0);
- if(ret < 0){
- printk("run_helper : pipe failed, ret = %d\n", -ret);
- goto out_free;
- }
-
- ret = os_set_exec_close(fds[1], 1);
- if(ret < 0){
- printk("run_helper : setting FD_CLOEXEC failed, ret = %d\n",
- -ret);
- goto out_close;
- }
-
- sp = stack + page_size() - sizeof(void *);
- data.pre_exec = pre_exec;
- data.pre_data = pre_data;
- data.argv = argv;
- data.fd = fds[1];
- pid = clone(helper_child, (void *) sp, CLONE_VM | SIGCHLD, &data);
- if(pid < 0){
- ret = -errno;
- printk("run_helper : clone failed, errno = %d\n", errno);
- goto out_close;
- }
-
- os_close_file(fds[1]);
- fds[1] = -1;
-
- /*Read the errno value from the child.*/
- n = os_read_file(fds[0], &ret, sizeof(ret));
- if(n < 0){
- printk("run_helper : read on pipe failed, ret = %d\n", -n);
- ret = n;
- os_kill_process(pid, 1);
- }
- else if(n != 0){
- CATCH_EINTR(n = waitpid(pid, NULL, 0));
- ret = -errno;
- } else {
- ret = pid;
- }
-
-out_close:
- if (fds[1] != -1)
- os_close_file(fds[1]);
- os_close_file(fds[0]);
-out_free:
- if(stack_out == NULL)
- free_stack(stack, 0);
- else *stack_out = stack;
- return(ret);
-}
-
-int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
- unsigned long *stack_out, int stack_order)
-{
- unsigned long stack, sp;
- int pid, status, err;
-
- stack = alloc_stack(stack_order, um_in_interrupt());
- if(stack == 0) return(-ENOMEM);
-
- sp = stack + (page_size() << stack_order) - sizeof(void *);
- pid = clone(proc, (void *) sp, flags | SIGCHLD, arg);
- if(pid < 0){
- err = -errno;
- printk("run_helper_thread : clone failed, errno = %d\n",
- errno);
- return err;
- }
- if(stack_out == NULL){
- CATCH_EINTR(pid = waitpid(pid, &status, 0));
- if(pid < 0){
- err = -errno;
- printk("run_helper_thread - wait failed, errno = %d\n",
- errno);
- pid = err;
- }
- if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0))
- printk("run_helper_thread - thread returned status "
- "0x%x\n", status);
- free_stack(stack, stack_order);
- }
- else *stack_out = stack;
- return(pid);
-}
-
-int helper_wait(int pid)
-{
- int ret;
-
- CATCH_EINTR(ret = waitpid(pid, NULL, WNOHANG));
- if(ret < 0){
- ret = -errno;
- printk("helper_wait : waitpid failed, errno = %d\n", errno);
- }
- return(ret);
-}
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index a97a72e516aa..7713e7a6f476 100644
--- a/arch/um/kernel/ksyms.c
+++ b/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);
diff --git a/arch/um/kernel/sigio_user.c b/arch/um/kernel/sigio_user.c
index a52751108aa1..3fbfd956bfe7 100644
--- a/arch/um/kernel/sigio_user.c
+++ b/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 */
diff --git a/arch/um/kernel/user_util.c b/arch/um/kernel/user_util.c
index 41d17c71511c..4c231161f257 100644
--- a/arch/um/kernel/user_util.c
+++ b/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"