[patch] s390: sys/user.h definitions.

[Martin Schwidefsky <schwidefsky at de dot ibm dot com>]

Hi,
including asm/user.h in the s390 version of sys/user.h can lead
to a problem with clashing definitions in kernel vs. user headers:

In file included from ./sys/ustat.h:30,
                 from ../sysdeps/unix/sysv/linux/ustat.c:21:
../sysdeps/generic/bits/ustat.h:26: error: redefinition of struct ustat

This error comes up because sys/user.h includes asm/user.h which includes
asm/ptrace.h which includes linux/types.h which has a definition of
struct ustat.

To avoid any more problems with including sys/user.h the attached patch
creates a user space version of the kernel header. The patch has been
used without problems for quite some time now.

blue skies,
  Martin.

2005-12-16  Martin Schwidefsky  <schwidefsky@de.ibm.com>

	* sysdeps/unix/sysv/linux/s390/sys/user.h: Copy struct user and
	dependent definitions from the kernel header to sys/user.h and
	remove the #include of asm/user.h.

diff -urpN libc/sysdeps/unix/sysv/linux/s390/sys/user.h libc-s390/sysdeps/unix/sysv/linux/s390/sys/user.h
--- libc/sysdeps/unix/sysv/linux/s390/sys/user.h	2001-07-06 06:56:20.000000000 +0200
+++ libc-s390/sysdeps/unix/sysv/linux/s390/sys/user.h	2005-07-11 15:37:26.000000000 +0200
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
+/* Copyright (C) 2000,2005 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -19,6 +19,65 @@
 #ifndef _SYS_USER_H
 #define _SYS_USER_H	1
 
-#include <asm/user.h>
+/* The whole purpose of this file is for GDB and GDB only.  Don't read
+   too much into it.  Don't use it for anything other than GDB unless
+   you know what you are doing.  */
+
+struct _user_psw_struct
+{
+  unsigned long mask;
+  unsigned long addr;
+};
+
+struct _user_fpregs_struct
+{
+  unsigned int fpc;
+  double fprs[16];
+};
+
+struct _user_per_struct
+{
+  unsigned long control_regs[3];
+  unsigned single_step       : 1;
+  unsigned instruction_fetch : 1;
+  unsigned                   : 30;
+  unsigned long starting_addr;
+  unsigned long ending_addr;
+  unsigned short perc_atmid;
+  unsigned long address;
+  unsigned char access_id;
+};
+
+struct _user_regs_struct
+{
+  struct _user_psw_struct psw;		/* Program status word.  */
+  unsigned long gprs[16];		/* General purpose registers.  */
+  unsigned int  acrs[16];		/* Access registers.  */
+  unsigned long orig_gpr2;		/* Original gpr2.  */
+  struct _user_fpregs_struct fp_regs;	/* Floating point registers.  */
+  struct _user_per_struct per_info;	/* Hardware tracing registers.  */
+  unsigned long ieee_instruction_pointer; 
+};
+
+struct user {
+  struct _user_regs_struct regs;	/* User registers.  */
+  unsigned long int u_tsize;		/* Text segment size (pages).  */
+  unsigned long int u_dsize;		/* Data segment size (pages).  */
+  unsigned long int u_ssize;		/* Stack segment size (pages).  */
+  unsigned long start_code;		/* Starting address of text.  */
+  unsigned long start_stack;		/* Starting address of stack area.  */
+  long int signal;			/* Signal causing the core dump.  */
+  struct _user_regs_struct *u_ar0;	/* Help gdb find registers.  */
+  unsigned long magic;			/* Identifies a core file.  */
+  char u_comm[32];			/* User command naem.  */
+};
+
+#define PAGE_SHIFT		12
+#define PAGE_SIZE		(1UL << PAGE_SHIFT)
+#define PAGE_MASK		(~(PAGE_SIZE-1))
+#define NBPG			PAGE_SIZE
+#define UPAGES			1
+#define HOST_TEXT_START_ADDR	(u.start_code)
+#define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)
 
 #endif	/* _SYS_USER_H */