[newlib-cygwin] Committed, CRIS port: fix fallout from time_t defaulting to 64 bits, part 1

[Hans-Peter Nilsson <hp@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=a6837ca34f9aebe1bada63334eaedb5866beaa4f

commit a6837ca34f9aebe1bada63334eaedb5866beaa4f
Author: Hans-Peter Nilsson <hp@bitrange.com>
Date:   Thu Sep 13 17:45:39 2018 +0200

    Committed, CRIS port: fix fallout from time_t defaulting to 64 bits, part 1
    
    It's been a while...  I see the CRIS port broke with the
    time_t-default-to-64-bit change, observable by a few test-cases in the
    gcc fortran(!) tests failing, regressing when trying a recent newlib.
    
    This is a two-part belt-and-suspenders change: adjust the CRIS port
    gettimeofday syscall (the only one in newlib/CRIS passing a time_t or
    struct timeval) to handle a userspace 64-bit time_t and secondly default
    time_t to 32-bit long anyway.  I considered making the local
    "kernel_timeval" copy in _gettimeofday conditional on (userspace) time_t
    being 64 bits, but thought it not worth bothering with the few move insns.
    The effect of a 64-bit time_t is however observable as longer simulation
    time when running the gcc testsuite and as bigger binaries without any
    actual upside from the larger time_t size, so I thought better make the
    default for this port go back to being a "long" again.
    
    Tested by running the gcc testsuite over the three combinations of two
    parts of the patch and observing the expected changes.  Committed.
    
    libgloss:
    	Adjust for syscall and userspace having different time_t or timeval.
    	* cris/linunistd.h (kernel_time_t, kernel_suseconds_t, kernel_timeval):
    	New types.
    	(gettimeofday): Change the type of the first argument to be a
    	pointer to a struct kernel_timeval.
    	* cris/gensyscalls (_gettimeofday): Use an intermediate struct
    	kernel_timeval for the syscall and initialize the result from
    	that.
    
    Signed-off-by: Hans-Peter Nilsson <hp@axis.com>

Diff:
---
 libgloss/cris/gensyscalls | 14 +++++++++++---
 libgloss/cris/linunistd.h | 12 ++++++++++--
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/libgloss/cris/gensyscalls b/libgloss/cris/gensyscalls
index b885a20..3e2f9af 100644
--- a/libgloss/cris/gensyscalls
+++ b/libgloss/cris/gensyscalls
@@ -1,5 +1,5 @@
 #! /bin/sh
-#  Copyright (C) 2005 Axis Communications.
+#  Copyright (C) 2005, 2018 Axis Communications.
 #  All rights reserved.
 #
 #  Redistribution and use in source and binary forms, with or without
@@ -93,8 +93,16 @@ cat > gettod.c <<EOF
 $lu#include <sys/time.h>
 #include <sys/times.h>
 int
-_gettimeofday (struct timeval *tp, void *tzp
-${r}gettimeofday (tp, tzp))
+_gettimeofday (struct timeval *tp, void *tzp)
+{
+  struct kernel_timeval kt;
+  int retval = _Sys_gettimeofday(&kt, tzp);
+  if (retval == 0)
+  {
+    tp->tv_sec = kt.tv_sec;
+    tp->tv_usec = kt.tv_usec;
+  }
+  R (retval)
 EOF
 cat > isatty.c <<EOF
 $lu
diff --git a/libgloss/cris/linunistd.h b/libgloss/cris/linunistd.h
index 4d664a2..310e470 100644
--- a/libgloss/cris/linunistd.h
+++ b/libgloss/cris/linunistd.h
@@ -1,5 +1,5 @@
 /* Support for syscalls for cris*-axis-linux-gnu and simulators
-   Copyright (C) 1998-2005 Axis Communications.
+   Copyright (C) 1998-2005, 2018 Axis Communications.
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
@@ -402,6 +402,14 @@ struct new_stat {
 	unsigned long  __unused5;
 };
 
+typedef long int kernel_time_t;
+typedef long int kernel_suseconds_t;
+
+struct kernel_timeval {
+  kernel_time_t      tv_sec;
+  kernel_suseconds_t tv_usec;
+};
+
 static inline _syscall2(int,stat,const char *,path,struct new_stat *,statbuf)
 static inline _syscall2(int,fstat,int,fd,struct new_stat *,statbuf)
 static inline _syscall0(int,getpid)
@@ -412,7 +420,7 @@ static inline _syscall1(long,times,struct tms *,tbuf)
 static inline _syscall1(long,mmap,long *, buf)
 struct timeval;
 struct timezone;
-static inline _syscall2(int,gettimeofday,struct timeval *,tp,
+static inline _syscall2(int,gettimeofday,struct kernel_timeval *,tp,
                         void *, tzp)
 static inline _syscall2(int,link,const char *,old,const char *,new)
 static inline _syscall1(int,unlink,const char *, f)