Merge commit 'origin/master' into nptl

Conflicts:
	Makefile.in
	extra/Configs/Config.in
	libc/sysdeps/linux/common/bits/kernel-features.h
	libc/sysdeps/linux/common/poll.c
	libc/sysdeps/linux/common/sysdep.h
	libc/sysdeps/linux/sh/sysdep.h

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

9 files changed, 201 insertions, 286 deletions

diff --git a/libc/sysdeps/linux/Makefile.commonarch b/libc/sysdeps/linux/Makefile.commonarch
index 10cfc12c3..8c893199e 100644
--- a/libc/sysdeps/linux/Makefile.commonarch
+++ b/libc/sysdeps/linux/Makefile.commonarch
@@ -18,12 +18,12 @@ ARCH_OBJS := $(ARCH_COBJ) $(ARCH_SOBJ)
 crt-y          := FORCE
 libc-y         += $(ARCH_OBJS)
 libc-nomulti-y += $(ARCH_SOBJ)
-objclean-y     += arch_clean
+objclean-y     += CLEAN_$(subst $(top_builddir),,$(ARCH_OUT))
 
 CFLAGS-crti.S+=$(PICFLAG)
 CFLAGS-crtn.S+=$(PICFLAG)
 
-arch_clean:
+CLEAN_$(subst $(top_builddir),,$(ARCH_OUT)):
 	$(do_rm) $(addprefix $(ARCH_OUT)/*., o os oS) $(CTOR_TARGETS) $(CRTS)
 
 ifneq ($(ARCH_HEADERS),)
@@ -34,8 +34,8 @@ $(ARCH_HEADERS_OUT):
 	$(do_ln) -fs $(call rel_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/$(@F) $@
 
 headers-y += $(ARCH_HEADERS_OUT)
-headers_clean-y += arch_headers_clean
-arch_headers_clean:
+headers_clean-y += HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT))
+HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT)):
 	$(RM) $(ARCH_HEADERS_OUT)
 
 endif
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index e86dc0c0d..a6fa6d091 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -119,7 +119,7 @@ libc-nomulti-y += $(COMMON_OUT)/__syscall_rt_sigaction.o \
 	$(COMMON_OUT)/stat.o
 libc-nomulti-$(UCLIBC_HAS_SSP) += $(COMMON_OUT)/ssp.o
 
-objclean-y += common_clean
+objclean-y += CLEAN_libc/sysdeps/linux/common
 
-common_clean:
+CLEAN_libc/sysdeps/linux/common:
 	$(do_rm) $(addprefix $(COMMON_OUT)/*., o os oS)
diff --git a/libc/sysdeps/linux/common/bits/kernel-features.h b/libc/sysdeps/linux/common/bits/kernel-features.h
index 8481f0640..68b881c09 100644
--- a/libc/sysdeps/linux/common/bits/kernel-features.h
+++ b/libc/sysdeps/linux/common/bits/kernel-features.h
@@ -46,6 +46,11 @@
 # define __ASSUME_GETCWD_SYSCALL	1
 #endif
 
+/* When was `poll' introduced?  */
+#if __LINUX_KERNEL_VERSION >= 131584
+# define __ASSUME_POLL_SYSCALL          1
+#endif
+
 /* Real-time signal became usable in 2.1.70.  */
 #if __LINUX_KERNEL_VERSION >= 131398
 # define __ASSUME_REALTIME_SIGNALS	1
diff --git a/libc/sysdeps/linux/common/getdents.c b/libc/sysdeps/linux/common/getdents.c
index 6a38772e8..5dda190a8 100644
--- a/libc/sysdeps/linux/common/getdents.c
+++ b/libc/sysdeps/linux/common/getdents.c
@@ -133,10 +133,6 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes)
     return (char *) dp - buf;
 }
 
-#if defined __UCLIBC_HAS_LFS__ && ! defined __NR_getdents64
-attribute_hidden strong_alias(__getdents,__getdents64)
-#endif
-
 #elif __WORDSIZE == 32
 
 extern __typeof(__getdents) __getdents64 attribute_hidden;
@@ -167,4 +163,8 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes)
 
 #endif
 
+#if defined __UCLIBC_HAS_LFS__ && ! defined __NR_getdents64
+attribute_hidden strong_alias(__getdents,__getdents64)
+#endif
+
 #endif
diff --git a/libc/sysdeps/linux/common/poll.c b/libc/sysdeps/linux/common/poll.c
index f50e92c8e..4211c26cc 100644
--- a/libc/sysdeps/linux/common/poll.c
+++ b/libc/sysdeps/linux/common/poll.c
@@ -19,6 +19,7 @@
 
 #include <sys/syscall.h>
 #include <sys/poll.h>
+#include <bits/kernel-features.h>
 
 #ifdef __UCLIBC_HAS_THREADS_NATIVE__
 #include <sysdep-cancel.h>
@@ -26,6 +27,8 @@
 #define SINGLE_THREAD_P 1
 #endif
 
+#if defined __ASSUME_POLL_SYSCALL && defined __NR_poll
+
 libc_hidden_proto(poll)
 
 #ifdef __NR_poll
diff --git a/libc/sysdeps/linux/common/sysdep.h b/libc/sysdeps/linux/common/sysdep.h
index 23151d914..dae74d7c5 100644
--- a/libc/sysdeps/linux/common/sysdep.h
+++ b/libc/sysdeps/linux/common/sysdep.h
@@ -156,3 +156,4 @@
 #define DW_EH_PE_funcrel	0x40
 #define DW_EH_PE_aligned	0x50
 #define DW_EH_PE_indirect	0x80
+
diff --git a/libc/sysdeps/linux/nios2/bits/fcntl.h b/libc/sysdeps/linux/nios2/bits/fcntl.h
index 7d0bcf946..e564b4217 100644
--- a/libc/sysdeps/linux/nios2/bits/fcntl.h
+++ b/libc/sysdeps/linux/nios2/bits/fcntl.h
@@ -1,5 +1,5 @@
 /* O_*, F_*, FD_* bit values for Linux.
-   Copyright (C) 2000 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2004 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
@@ -48,6 +48,8 @@
 # define O_DIRECTORY	 040000	/* Must be a directory.	 */
 # define O_NOFOLLOW	0100000	/* Do not follow links.	 */
 # define O_DIRECT	0200000	/* Direct disk access.	*/
+# define O_NOATIME	01000000 /* Do not set atime.  */
+# define O_CLOEXEC	02000000 /* set close_on_exec */
 #endif
 
 /* For now Linux has synchronisity options for data and read operations.
@@ -81,7 +83,7 @@
 #define F_SETLK64	13	/* Set record locking info (non-blocking).  */
 #define F_SETLKW64	14	/* Set record locking info (blocking).	*/
 
-#if defined __USE_BSD || defined __USE_XOPEN2K
+#if defined __USE_BSD || defined __USE_UNIX98
 # define F_SETOWN	8	/* Get owner of socket (receiver of SIGIO).  */
 # define F_GETOWN	9	/* Set owner of socket (receiver of SIGIO).  */
 #endif
diff --git a/libc/sysdeps/linux/nios2/bits/syscalls.h b/libc/sysdeps/linux/nios2/bits/syscalls.h
index ec5370712..f80bea206 100644
--- a/libc/sysdeps/linux/nios2/bits/syscalls.h
+++ b/libc/sysdeps/linux/nios2/bits/syscalls.h
@@ -9,287 +9,98 @@
 #include <errno.h>
 #include <asm/traps.h>
 
-#define __syscall_return(type, res) \
-do { \
-	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
-                                                                        \
-                /* avoid using res which is declared to be in           \
-                    register r2; errno might expand to a function       \
-                    call and clobber it.                          */    \
-                                                                        \
-		int __err = -(res); \
-		errno = __err; \
-		res = -1; \
-	} \
-	return (type) (res); \
-} while (0)
+#define __syscall_return(type, res)					\
+	do {								\
+		if (unlikely(INTERNAL_SYSCALL_ERROR_P(res, ))) {	\
+			__set_errno(INTERNAL_SYSCALL_ERRNO(res, ));	\
+			res = (unsigned long) -1;			\
+		}							\
+		return (type) (res);					\
+	} while (0)
 
-#define _syscall0(type,name) \
-type name(void) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...)			\
+	({								\
+		long __res;						\
+		__asm__ __volatile__ (					\
+			"movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
+			"movi    r3,    %1\n\t"   /* __NR_##name     */	\
+			ASM_ARGS_##nr					\
+			"trap\n\t"					\
+			"mov     %0,    r2\n\t"   /* syscall return  */	\
+			:   "=r" (__res)          /* %0              */	\
+			:   "i" (name)            /* %1              */	\
+			  , "i" (TRAP_ID_SYSCALL) /* %2              */	\
+			  MAP_ARGS_##nr (args)    /* %3-%8           */	\
+			:   "r2"					\
+			  , "r3"					\
+			  CLOB_ARGS_##nr          /* Clobbered       */ \
+		);							\
+		__res;							\
+	})
 
-#define _syscall1(type,name,atype,a) \
-type name(atype a) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-        "    mov     r4,    %3\n\t"   /* (long) a        */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-          , "r" ((long) a)            /* %3              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-          , "r4"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define INTERNAL_SYSCALL_ERROR_P(val, err)	\
+	((unsigned long)(val) >= (unsigned long)(-125))
 
-#define _syscall2(type,name,atype,a,btype,b) \
-type name(atype a,btype b) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-        "    mov     r4,    %3\n\t"   /* (long) a        */ \
-        "    mov     r5,    %4\n\t"   /* (long) b        */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-          , "r" ((long) a)            /* %3              */ \
-          , "r" ((long) b)            /* %4              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-          , "r4"                      /* Clobbered       */ \
-          , "r5"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define ASM_ARGS_0
+#define MAP_ARGS_0()
+#define CLOB_ARGS_0
 
-#define _syscall3(type,name,atype,a,btype,b,ctype,c) \
-type name(atype a,btype b,ctype c) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-        "    mov     r4,    %3\n\t"   /* (long) a        */ \
-        "    mov     r5,    %4\n\t"   /* (long) b        */ \
-        "    mov     r6,    %5\n\t"   /* (long) c        */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-          , "r" ((long) a)            /* %3              */ \
-          , "r" ((long) b)            /* %4              */ \
-          , "r" ((long) c)            /* %5              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-          , "r4"                      /* Clobbered       */ \
-          , "r5"                      /* Clobbered       */ \
-          , "r6"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define ASM_ARGS_1		\
+	"mov     r4,    %3\n\t"
+#define MAP_ARGS_1(a)		\
+	, "r" ((long) a)
+#define CLOB_ARGS_1		\
+	, "r4"
 
-#define _syscall4(type,name,atype,a,btype,b,ctype,c,dtype,d) \
-type name (atype a, btype b, ctype c, dtype d) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-        "    mov     r4,    %3\n\t"   /* (long) a        */ \
-        "    mov     r5,    %4\n\t"   /* (long) b        */ \
-        "    mov     r6,    %5\n\t"   /* (long) c        */ \
-        "    mov     r7,    %6\n\t"   /* (long) d        */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-          , "r" ((long) a)            /* %3              */ \
-          , "r" ((long) b)            /* %4              */ \
-          , "r" ((long) c)            /* %5              */ \
-          , "r" ((long) d)            /* %6              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-          , "r4"                      /* Clobbered       */ \
-          , "r5"                      /* Clobbered       */ \
-          , "r6"                      /* Clobbered       */ \
-          , "r7"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define ASM_ARGS_2		\
+	ASM_ARGS_1		\
+	"mov     r5,    %4\n\t"
+#define MAP_ARGS_2(a, b)	\
+	MAP_ARGS_1(a)		\
+	, "r" ((long) b)
+#define CLOB_ARGS_2		\
+	CLOB_ARGS_1		\
+	, "r5"
 
-#define _syscall5(type,name,atype,a,btype,b,ctype,c,dtype,d,etype,e) \
-type name (atype a,btype b,ctype c,dtype d,etype e) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-        "    mov     r4,    %3\n\t"   /* (long) a        */ \
-        "    mov     r5,    %4\n\t"   /* (long) b        */ \
-        "    mov     r6,    %5\n\t"   /* (long) c        */ \
-        "    mov     r7,    %6\n\t"   /* (long) c        */ \
-        "    mov     r8,    %7\n\t"   /* (long) e        */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-          , "r" ((long) a)            /* %3              */ \
-          , "r" ((long) b)            /* %4              */ \
-          , "r" ((long) c)            /* %5              */ \
-          , "r" ((long) d)            /* %6              */ \
-          , "r" ((long) e)            /* %7              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-          , "r4"                      /* Clobbered       */ \
-          , "r5"                      /* Clobbered       */ \
-          , "r6"                      /* Clobbered       */ \
-          , "r7"                      /* Clobbered       */ \
-          , "r8"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define ASM_ARGS_3		\
+	ASM_ARGS_2		\
+	"mov     r6,    %5\n\t"
+#define MAP_ARGS_3(a, b, c)	\
+	MAP_ARGS_2(a, b)	\
+	, "r" ((long) c)
+#define CLOB_ARGS_3		\
+	CLOB_ARGS_2		\
+	, "r6"
 
-#define _syscall6(type,name,atype,a,btype,b,ctype,c,dtype,d,etype,e,ftype,f) \
-type name (atype a,btype b,ctype c,dtype d,etype e,ftype f) \
-{ \
-    long __res;                                             \
-                                                            \
-    __asm__ __volatile__ (                                  \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        "    movi    r2,    %2\n\t"   /* TRAP_ID_SYSCALL */ \
-        "    movi    r3,    %1\n\t"   /* __NR_##name     */ \
-        "    mov     r4,    %3\n\t"   /* (long) a        */ \
-        "    mov     r5,    %4\n\t"   /* (long) b        */ \
-        "    mov     r6,    %5\n\t"   /* (long) c        */ \
-        "    mov     r7,    %6\n\t"   /* (long) c        */ \
-        "    mov     r8,    %7\n\t"   /* (long) e        */ \
-        "    mov     r9,    %8\n\t"   /* (long) f        */ \
-                                                            \
-        "    trap\n\t"                                      \
-        "    mov     %0,    r2\n\t"   /* syscall rtn     */ \
-                                                            \
-        "    \n\t"                                          \
-                                                            \
-        :   "=r" (__res)              /* %0              */ \
-                                                            \
-        :   "i" (__NR_##name)         /* %1              */ \
-          , "i" (TRAP_ID_SYSCALL)     /* %2              */ \
-          , "r" ((long) a)            /* %3              */ \
-          , "r" ((long) b)            /* %4              */ \
-          , "r" ((long) c)            /* %5              */ \
-          , "r" ((long) d)            /* %6              */ \
-          , "r" ((long) e)            /* %7              */ \
-          , "r" ((long) f)            /* %8              */ \
-                                                            \
-        :   "r2"                      /* Clobbered       */ \
-          , "r3"                      /* Clobbered       */ \
-          , "r4"                      /* Clobbered       */ \
-          , "r5"                      /* Clobbered       */ \
-          , "r6"                      /* Clobbered       */ \
-          , "r7"                      /* Clobbered       */ \
-          , "r8"                      /* Clobbered       */ \
-          , "r9"                      /* Clobbered       */ \
-        );                                                  \
-                                                            \
-__syscall_return(type,__res); \
-}
+#define ASM_ARGS_4		\
+	ASM_ARGS_3		\
+	"mov     r7,    %6\n\t"
+#define MAP_ARGS_4(a, b, c, d)	\
+	MAP_ARGS_3(a, b, c)	\
+	, "r" ((long) d)
+#define CLOB_ARGS_4		\
+	CLOB_ARGS_3		\
+	, "r7"
+
+#define ASM_ARGS_5		\
+	ASM_ARGS_4		\
+	"mov     r8,    %7\n\t"
+#define MAP_ARGS_5(a, b, c, d, e)	\
+	MAP_ARGS_4(a, b, c, d)		\
+	, "r" ((long) e)
+#define CLOB_ARGS_5		\
+	CLOB_ARGS_4		\
+	, "r8"
+
+#define ASM_ARGS_6		\
+	ASM_ARGS_5		\
+	"mov     r9,    %8\n\t"
+#define MAP_ARGS_6(a, b, c, d, e, f)	\
+	MAP_ARGS_5(a, b, c, d, e)	\
+	, "r" ((long) f)
+#define CLOB_ARGS_6		\
+	CLOB_ARGS_5		\
+	, "r9"
 
 #endif /* __ASSEMBLER__ */
 #endif /* _BITS_SYSCALLS_H */
-
diff --git a/libc/sysdeps/linux/nios2/sys/user.h b/libc/sysdeps/linux/nios2/sys/user.h
new file mode 100644
index 000000000..b34e93e97
--- /dev/null
+++ b/libc/sysdeps/linux/nios2/sys/user.h
@@ -0,0 +1,93 @@
+#ifndef _SYS_USER_H
+#define _SYS_USER_H     1
+
+/*
+   This file was taken from the nios2 port of the Linux Kernel.
+
+   Copyright (c) 2008 Atle Nissestad <atle@nissestad.no>
+   Copyright (c) 2010 Tobias Klauser <tklauser@distanz.ch>
+
+   This file is licensed under the terms of the GNU General Public License,
+   Version 2.
+ */
+
+#include <bits/uClibc_page.h>
+
+/* Core file format: The core file is written in such a way that gdb
+   can understand it and provide useful information to the user (under
+   linux we use the 'trad-core' bfd).  There are quite a number of
+   obstacles to being able to view the contents of the floating point
+   registers, and until these are solved you will not be able to view the
+   contents of them.  Actually, you can read in the core file and look at
+   the contents of the user struct to find out what the floating point
+   registers contain.
+   The actual file contents are as follows:
+   UPAGE: 1 page consisting of a user struct that tells gdb what is present
+   in the file.  Directly after this is a copy of the task_struct, which
+   is currently not used by gdb, but it may come in useful at some point.
+   All of the registers are stored as part of the upage.  The upage should
+   always be only one page.
+   DATA: The data area is stored.  We use current->end_text to
+   current->brk to pick up all of the user variables, plus any memory
+   that may have been malloced.  No attempt is made to determine if a page
+   is demand-zero or if a page is totally unused, we just cover the entire
+   range.  All of the addresses are rounded in such a way that an integral
+   number of pages is written.
+   STACK: We need the stack information in order to get a meaningful
+   backtrace.  We need to write the data from (esp) to
+   current->start_stack, so we round each of these off in order to be able
+   to write an integer number of pages.
+   The minimum core file size is 3 pages, or 12288 bytes.
+*/
+
+struct user_nios2fp_struct {
+};
+
+/* This is the old layout of "struct pt_regs" as of Linux 1.x, and
+   is still the layout used by user (the new pt_regs doesn't have
+   all registers). */
+struct user_regs_struct {
+	long r1,r2,r3,r4,r5,r6,r7,r8;
+	long r9,r10,r11,r12,r13,r14,r15;
+	long r16,r17,r18,r19,r20,r21,r22,r23;
+	long gp;
+	long sp;
+	long ra;
+	long fp;
+	long orig_r2;
+	long estatus;
+	long status_extension;
+	long ea;
+};
+
+/* When the kernel dumps core, it starts by dumping the user struct -
+   this will be used by gdb to figure out where the data and stack segments
+   are within the file, and what virtual addresses to use. */
+struct user {
+/* We start with the registers, to mimic the way that "memory" is returned
+   from the ptrace(3,...) function.  */
+	struct user_regs_struct regs;	/* Where the registers are actually stored */
+
+/* The rest of this junk is to help gdb figure out what goes where */
+	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 virtual address of text. */
+	unsigned long start_stack;	/* Starting virtual address of stack area.
+					   This is actually the bottom of the stack,
+					   the top of the stack is always found in the
+					   esp register.  */
+	long int signal;		/* Signal that caused the core dump. */
+	int reserved;			/* No longer used */
+	unsigned long u_ar0;		/* Used by gdb to help find the values for */
+					/* the registers. */
+	unsigned long magic;		/* To uniquely identify a core file */
+	char u_comm[32];		/* User command that was responsible */
+};
+
+#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