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Re: Building GLIBC 2.3.4 on MIPS

To: Kumba <kumba@gentoo.org>
Subject: Re: Building GLIBC 2.3.4 on MIPS
From: Jim Gifford <maillist@jg555.com>
Date: Thu, 24 Feb 2005 09:21:12 -0800
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>, libc-alpha@sources.redhat.com, linux-mips@linux-mips.org
In-reply-to: <421DE686.6040003@gentoo.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <421BCF34.90308@jg555.com> <421BD616.4030101@avtrex.com> <Pine.LNX.4.61L.0502231300200.11922@blysk.ds.pg.gda.pl> <421DE686.6040003@gentoo.org>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mozilla Thunderbird 0.9 (Windows/20041103)
I updated the patch, that was posted in libc-alpha and I have tested it. Thanx to you all for your assistance.

http://ftp.jg555.com/patches/raq2/glibc/glibc-2.3.4-mips_syscall-2.patch



Submitted By: Jim Gifford (patches at jg555 dot com)
Date: 2005-02-23
Initial Package Version: 2.3.4
Origin: Richard Sandiford
Upstream Status: Unknown
Description: Fixes Syscall.h generation
 
diff -Naur glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/Makefile 
glibc-2.3.4/sysdeps/unix/sysv/linux/mips/Makefile
--- glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/Makefile      2004-11-24 
04:38:15 +0000
+++ glibc-2.3.4/sysdeps/unix/sysv/linux/mips/Makefile   2005-02-23 18:21:54 
+0000
@@ -9,11 +9,73 @@
 
 no_syscall_list_h = 1
 
-# Generate the list of SYS_* macros for the system calls (__NR_* macros).
-# We generate not only SYS_<syscall>, pointing at SYS_<abi>_<syscall> if
-# it exists, but also define SYS_<abi>_<syscall> for all ABIs.
+# A callable macro that expands to a shell command.  Preprocess file $(1)
+# using ABI option $(2) and see which macros it defines.  Print FOO for each
+# macro of the form __NR$(3)_FOO, filtering out ABI-specific __NR macros
+# that have a prefix other than $(3).
+mips_list_syscalls =   $(filter-out -m%,$(CC)) -E -x c $(+includes) \
+                           $(sysincludes) -D_LIBC -dM -mabi=$(2) $(1) | \
+                       sed -n 's@^\#define __NR$(3)_\([^ ]*\) .*@\1@p' | \
+                       sed -e '/^[ON]32_/d' -e '/^N64_/d' -e '/^64_/d' | \
+                       LC_ALL=C sort
+
+# Generate a list of SYS_* macros from the linux __NR macros.
+#
+# Before version 2.6, linux had separate 32-bit and 64-bit MIPS ports,
+# each with its own set of headers.  The ports were merged for 2.6 and
+# this merged port defines the syscalls in a slightly different way.
+# There are therefore three sets of headers that we need to consider:
+#
+#    (1) Headers from the separate 32-bit MIPS port.  They just define
+#       a single list of __NR macros.
+#
+#    (2) Headers from the separate 64-bit MIPS port.  They unconditionally
+#       define syscalls for all three ABIs, with o32 syscalls prefixed
+#       by __NR_O32, n32 syscalls prefixed by __NR_N32 and n64 syscalls
+#       prefixed by plain __NR.
+#
+#    (3) Headers from the combined port.  They use the _MIPS_SIM macro to
+#       define the right set of syscalls for the current ABI.  The syscalls
+#       themselves have no special ABI prefix, but the headers also define:
+#
+#          __NR_O32_Linux{,_syscalls}
+#          __NR_N32_Linux{,_syscalls}
+#          __NR_64_Linux{,_syscalls}
+#
+# In case (1) we just want a simple list of SYS_* macros.  In cases (2)
+# and (3) we want a file that will work for all three ABIs, regardless
+# of which ABI we are currently using.  We also want the file to work
+# if the user later moves from (2) to (3).  Thus the file we create
+# for (2) and (3) has the form:
+#
+#    #if _MIPS_SIM == _MIPS_SIM_NABI32
+#    # ifdef __NR_N32_open
+#    #  define SYS_n32syscall1 __NR_N32_n32syscall1
+#    #  ...
+#    # else
+#    #  define SYS_n32syscall1 __NR_n32syscall1
+#    #  ...
+#    # endif
+#    #elif _MIPS_SIM == _MIPS_SIM_ABI64
+#    # define SYS_n64syscall1 __NR_n64syscall1
+#    # ...
+#    #else
+#    # ifdef __NR_O32_open
+#    #  define SYS_o32syscall1 __NR_O32_o32syscall1
+#    #  ...
+#    # else
+#    #  define SYS_o32syscall1 __NR_o32syscall1
+#    #  ...
+#    # endif
+#    #endif
+#
+# Here, __NR_N32_open and __NR_O32_open are used to detect case (2)
+# over case (3).  The n64 SYS_* macros can always use the normal
+# ABI-less names.
 $(objpfx)syscall-%.h $(objpfx)syscall-%.d: 
../sysdeps/unix/sysv/linux/mips/sys/syscall.h
        $(make-target-directory)
+       $(CC) -E -x c $(+includes) $(sysincludes) -D_LIBC $< -MD -MP \
+             -MF $(@:.h=.d)-t -MT '$(@:.d=.h) $(@:.h=.d)' > /dev/null
        { \
         echo '/* Generated at libc build time from kernel syscall list.  */';\
         echo ''; \
@@ -22,28 +84,38 @@
         echo '#endif'; \
         echo ''; \
         echo '#include <sgidefs.h>'; \
-        rm -f $(@:.d=.h).newt; \
-        $(CC) -E -MD -MP -MF $(@:.h=.d)-t -MT '$(@:.d=.h) $(@:.h=.d)' \
-              -x c $(+includes) $(sysincludes) $< -D_LIBC -dM | \
-        sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' \
-            > $(@:.d=.h).newt; \
-        if grep SYS_O32_ $(@:.d=.h).newt > /dev/null; then \
+        rm -f $(@:.d=.h).new32 $(@:.d=.h).newn32 $(@:.d=.h).new64; \
+        $(call mips_list_syscalls,$<,n32,_N32) > $(@:.d=.h).newn32; \
+        if test -s $(@:.d=.h).newn32; then \
+          if grep open $(@:.d=.h).newn32 > /dev/null; then \
+            $(call mips_list_syscalls,$<,32,_O32) > $(@:.d=.h).new32; \
+            $(call mips_list_syscalls,$<,64,) > $(@:.d=.h).new64; \
+          else \
+            $(call mips_list_syscalls,$<,32,) > $(@:.d=.h).new32; \
+            $(call mips_list_syscalls,$<,n32,) > $(@:.d=.h).newn32; \
+            $(call mips_list_syscalls,$<,64,) > $(@:.d=.h).new64; \
+          fi; \
           echo '#if _MIPS_SIM == _ABIN32'; \
-          sed -n 's/^\(#define SYS_\)N32_/\1/p' < $(@:.d=.h).newt | \
-               LC_ALL=C sort; \
+          echo '# ifdef __NR_N32_open'; \
+          sed 's@\(.*\)@#  define SYS_\1 __NR_N32_\1@' < $(@:.d=.h).newn32; \
+          echo '# else'; \
+          sed 's@\(.*\)@#  define SYS_\1 __NR_\1@' < $(@:.d=.h).newn32; \
+          echo '# endif'; \
           echo '#elif _MIPS_SIM == _ABI64'; \
-          sed -n 's/^\(#define SYS_\)N64_/\1/p' < $(@:.d=.h).newt | \
-               LC_ALL=C sort; \
+          sed 's@\(.*\)@# define SYS_\1 __NR_\1@' < $(@:.d=.h).new64; \
           echo '#else'; \
-          sed -n 's/^\(#define SYS_\)O32_/\1/p' < $(@:.d=.h).newt | \
-               LC_ALL=C sort; \
+          echo '# ifdef __NR_O32_open'; \
+          sed 's@\(.*\)@#  define SYS_\1 __NR_O32_\1@' < $(@:.d=.h).new32; \
+          echo '# else'; \
+          sed 's@\(.*\)@#  define SYS_\1 __NR_\1@' < $(@:.d=.h).new32; \
+          echo '# endif'; \
           echo '#endif'; \
-          sed -n '/^#define SYS_\([ON]32\|N64\)_/p' < $(@:.d=.h).newt | \
-               LC_ALL=C sort +1.8; \
         else \
-          cat $(@:.d=.h).newt; \
+          $(CC) -E -x c $(+includes) $(sysincludes) -D_LIBC -dM $< | \
+          sed -n 's@^\#define __NR_\([^ ]*\) .*@\#define SYS_\1 __NR_\1@p' | \
+          LC_ALL=C sort; \
         fi; \
-        rm $(@:.d=.h).newt; \
+        rm -f $(@:.d=.h).new32 $(@:.d=.h).newn32 $(@:.d=.h).new64; \
        } > $(@:.d=.h).new
        mv -f $(@:.d=.h).new $(@:.d=.h)
 ifneq (,$(objpfx))
diff -Naur glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/configure 
glibc-2.3.4/sysdeps/unix/sysv/linux/mips/configure
--- glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/configure     2004-11-24 
04:42:45 +0000
+++ glibc-2.3.4/sysdeps/unix/sysv/linux/mips/configure  2005-02-23 18:10:11 
+0000
@@ -18,7 +18,7 @@
     { echo "$as_me:$LINENO: WARNING: *** asm/unistd.h not found, it will not 
be pre-processed" >&5
 echo "$as_me: WARNING: *** asm/unistd.h not found, it will not be 
pre-processed" >&2;}
     echo '#include <asm/unistd.h>' > asm-unistd.h
-  else
+  elif grep __NR_N32_open "$asm_unistd_h" > /dev/null; then
     # The point of this preprocessing is to turn __NR_<syscall> into
     # __NR_N64_<syscall>, as well as to define __NR_<syscall> to
     # __NR_<abi>_<syscall>, if __NR_<abi>_<syscall> is defined
@@ -68,6 +68,8 @@
 {
        print;
 }'
+  else
+    echo '#include <asm/unistd.h>' > asm-unistd.h
   fi ;;
 mips*)
   rm -f asm-unistd.h
diff -Naur glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/configure.in 
glibc-2.3.4/sysdeps/unix/sysv/linux/mips/configure.in
--- glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/configure.in  2004-11-24 
04:38:31 +0000
+++ glibc-2.3.4/sysdeps/unix/sysv/linux/mips/configure.in       2005-02-23 
18:10:11 +0000
@@ -18,7 +18,7 @@
   if test ! -f "$asm_unistd_h"; then
     AC_MSG_WARN([*** asm/unistd.h not found, it will not be pre-processed])
     echo '#include <asm/unistd.h>' > asm-unistd.h
-  else
+  elif grep __NR_N32_open "$asm_unistd_h" > /dev/null; then
     # The point of this preprocessing is to turn __NR_<syscall> into
     # __NR_N64_<syscall>, as well as to define __NR_<syscall> to
     # __NR_<abi>_<syscall>, if __NR_<abi>_<syscall> is defined
@@ -68,6 +68,8 @@
 {
        print;
 }'
+  else
+    echo '#include <asm/unistd.h>' > asm-unistd.h
   fi ;;
 mips*)
   rm -f asm-unistd.h
diff -Naur glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h 
glibc-2.3.4/sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h
--- glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h        
2003-03-29 08:15:29 +0000
+++ glibc-2.3.4/sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h     
2005-02-23 18:10:11 +0000
@@ -1,36 +0,0 @@
-/* Copyright (C) 2000, 2002, 2003 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
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#ifndef _LINUX_MIPS_MIPS32_KERN64_SYSDEP_H
-#define _LINUX_MIPS_MIPS32_KERN64_SYSDEP_H 1
-
-/* There is some commonality.  */
-#include <sysdeps/unix/sysv/linux/mips/mips32/sysdep.h>
-
-/* For Linux we can use the system call table in the header file
-       /usr/include/asm/unistd.h
-   of the kernel.  But these symbols do not follow the SYS_* syntax
-   so we have to redefine the `SYS_ify' macro here.  */
-#undef SYS_ify
-#ifdef __STDC__
-# define SYS_ify(syscall_name) __NR_O32_##syscall_name
-#else
-# define SYS_ify(syscall_name) __NR_O32_/**/syscall_name
-#endif
-
-#endif /* linux/mips/mips32/kern64/sysdep.h */
diff -Naur glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h 
glibc-2.3.4/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h
--- glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h   
2004-10-18 05:16:07 +0000
+++ glibc-2.3.4/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h        
2005-02-23 18:10:11 +0000
@@ -28,9 +28,9 @@
    so we have to redefine the `SYS_ify' macro here.  */
 #undef SYS_ify
 #ifdef __STDC__
-# define SYS_ify(syscall_name) __NR_N32_##syscall_name
+# define SYS_ify(syscall_name) __NR_##syscall_name
 #else
-# define SYS_ify(syscall_name) __NR_N32_/**/syscall_name
+# define SYS_ify(syscall_name) __NR_/**/syscall_name
 #endif
 
 #ifdef __ASSEMBLER__
diff -Naur glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h 
glibc-2.3.4/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h
--- glibc-2.3.4.orig/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h   
2004-10-18 05:16:08 +0000
+++ glibc-2.3.4/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h        
2005-02-23 18:10:11 +0000
@@ -28,9 +28,9 @@
    so we have to redefine the `SYS_ify' macro here.  */
 #undef SYS_ify
 #ifdef __STDC__
-# define SYS_ify(syscall_name) __NR_N64_##syscall_name
+# define SYS_ify(syscall_name) __NR_##syscall_name
 #else
-# define SYS_ify(syscall_name) __NR_N64_/**/syscall_name
+# define SYS_ify(syscall_name) __NR_/**/syscall_name
 #endif
 
 #ifdef __ASSEMBLER__
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