From 4fef0c10fa174b57a10854b8b4b2b90d155706e0 Mon Sep 17 00:00:00 2001
From: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
Date: Wed, 18 Jan 2006 17:42:41 -0800
Subject: [PATCH] uml: move libc-dependent utility procedures

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

This moves all systemcalls from user_util.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 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 arch/um/os-Linux/util.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 arch/um/os-Linux/util.c

(limited to 'arch/um/os-Linux/util.c')

diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
new file mode 100644
index 00000000000..d224434d561
--- /dev/null
+++ b/arch/um/os-Linux/util.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <setjmp.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include "asm/types.h"
+#include <ctype.h>
+#include <signal.h>
+#include <wait.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <sched.h>
+#include <termios.h>
+#include <string.h>
+#include "user_util.h"
+#include "kern_util.h"
+#include "user.h"
+#include "mem_user.h"
+#include "init.h"
+#include "ptrace_user.h"
+#include "uml-config.h"
+#include "os.h"
+
+void stack_protections(unsigned long address)
+{
+	int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
+
+	if(mprotect((void *) address, page_size(), prot) < 0)
+		panic("protecting stack failed, errno = %d", errno);
+}
+
+void task_protections(unsigned long address)
+{
+	unsigned long guard = address + page_size();
+	unsigned long stack = guard + page_size();
+	int prot = 0, pages;
+
+#ifdef notdef
+	if(mprotect((void *) stack, page_size(), prot) < 0)
+		panic("protecting guard page failed, errno = %d", errno);
+#endif
+	pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2;
+	prot = PROT_READ | PROT_WRITE | PROT_EXEC;
+	if(mprotect((void *) stack, pages * page_size(), prot) < 0)
+		panic("protecting stack failed, errno = %d", errno);
+}
+
+int raw(int fd)
+{
+	struct termios tt;
+	int err;
+
+	CATCH_EINTR(err = tcgetattr(fd, &tt));
+	if(err < 0)
+		return -errno;
+
+	cfmakeraw(&tt);
+
+	CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
+	if(err < 0)
+		return -errno;
+
+	/* XXX tcsetattr could have applied only some changes
+	 * (and cfmakeraw() is a set of changes) */
+	return(0);
+}
+
+void setup_machinename(char *machine_out)
+{
+	struct utsname host;
+
+	uname(&host);
+#if defined(UML_CONFIG_UML_X86) && !defined(UML_CONFIG_64BIT)
+	if (!strcmp(host.machine, "x86_64")) {
+		strcpy(machine_out, "i686");
+		return;
+	}
+#endif
+	strcpy(machine_out, host.machine);
+}
+
+char host_info[(_UTSNAME_LENGTH + 1) * 4 + _UTSNAME_NODENAME_LENGTH + 1];
+
+void setup_hostinfo(void)
+{
+	struct utsname host;
+
+	uname(&host);
+	sprintf(host_info, "%s %s %s %s %s", host.sysname, host.nodename,
+		host.release, host.version, host.machine);
+}
+
+int setjmp_wrapper(void (*proc)(void *, void *), ...)
+{
+	va_list args;
+	sigjmp_buf buf;
+	int n;
+
+	n = sigsetjmp(buf, 1);
+	if(n == 0){
+		va_start(args, proc);
+		(*proc)(&buf, &args);
+	}
+	va_end(args);
+	return(n);
+}
-- 
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