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Date: Thu, 06 Sep 2007 19:17:39 +0300
From: Andris Pavenis <andris DOT pavenis AT iki DOT fi>
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To: djgpp-workers AT delorie DOT com
Subject: Problems cross-building DJGPP C library from Linux
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Run into 2 problems when cross-building DJGPP C library from Linux=20
x86_64. The first one is however not x86_64, but binutils-2.18 related.

1) The format of output of GAS version has been changed. Attached patch=20
fixes it, so it should work both with old and new binutils versions.=20
Verified with 2.18, but I don't see why it should not work with earlier
versions

2) hostbin/dxegen.exe crashes with SIGSEGV. Perhaps length of integer=20
types variables messes things up:

Output from GDB included

Andris


[andris AT ap SPECS]$ [andris AT ap libemu]$ gdb ../../hostbin/dxegen.exe=20
core.14895
GNU gdb Red Hat Linux (6.6-15.fc7rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you =
are
welcome to change it and/or distribute copies of it under certain=20
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for detail=
s.
This GDB was configured as "x86_64-redhat-linux-gnu"...
Using host libthread_db library "/lib64/libthread_db.so.1".
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Core was generated by `./../../hostbin/dxegen.exe ./../../bin/emu387.dxe=20
__emu_entry src/emu387.o id_e'.
Program terminated with signal 11, Segmentation fault.
#0  0x0000003d7be7869b in mempcpy () from /lib64/libc.so.6
(gdb) where
#0  0x0000003d7be7869b in mempcpy () from /lib64/libc.so.6
#1  0x0000003d7be69d8e in _IO_file_xsgetn_internal () from /lib64/libc.so=
.6
#2  0x0000003d7be60112 in fread () from /lib64/libc.so.6
#3  0x00000000004014f8 in write_dxe (inf=3D0x607160, outf=3D0x6073a0,=20
fh=3D0x7fff0b3c2400) at dxe3gen.c:553
#4  0x0000000000402d42 in main (argc=3D<value optimized out>, argv=3D<val=
ue=20
optimized out>) at dxe3gen.c:1173
(gdb) f 3
#3  0x00000000004014f8 in write_dxe (inf=3D0x607160, outf=3D0x6073a0,=20
fh=3D0x7fff0b3c2400) at dxe3gen.c:553
553      fread(data, 1, sc.s_size, inf);
(gdb) p sc
$1 =3D {s_name =3D "<\000\000\000=EF=BF=BD{\000", s_paddr =3D 60000693125=
12, s_vaddr =3D=20
133384504344608, s_size =3D 13802688432960485005,
   s_scnptr =3D 9928521094656950272, s_relptr =3D 8466766210556585701,=20
s_lnnoptr =3D 14048700521977514787, s_nreloc =3D 0,
   s_nlnno =3D 16384, s_flags =3D 897625561524862975}
(gdb) p /x sc
$2 =3D {s_name =3D {0x3c, 0x0, 0x0, 0x0, 0xfc, 0x7b, 0x0, 0x0}, s_paddr =3D=
=20
0x57500000000, s_vaddr =3D 0x795000000020,
   s_size =3D 0xbf8d00000000b68d, s_scnptr =3D 0x89c9315500000000, s_relp=
tr=20
=3D 0x757fff02788166e5, s_lnnoptr =3D 0xc2f702b108508b23,
   s_nreloc =3D 0x0, s_nlnno =3D 0x4000, s_flags =3D 0xc7501b13fffffff}



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Content-Type: text/x-patch;
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 filename="djcrx-as_version.diff"

diff -up djgpp/src/makefile.inc.as_version djgpp/src/makefile.inc
--- djgpp/src/makefile.inc.as_version	2007-09-06 19:01:47.000000000 +0300
+++ djgpp/src/makefile.inc	2007-09-06 18:48:33.000000000 +0300
@@ -20,8 +20,7 @@ endif
 
 # Set $(AS) before first use
 #
-AS := $(shell $(CROSS_GCC) $(GCC_OPT) -print-prog-name=as)
-AS := $(subst \,/,$(AS))
+AS := $(shell $(CROSS_GCC) $(GCC_OPT) -print-prog-name=as | sed 1q | sed 's:^.*\([1-9]\.[0-9\.]*\)$:\1:')
 
 # These were suggested by Tim Van Holder <tim DOT van DOT holder AT pandora DOT be>
 # but since $(CROSS_LD) is set in makefile.def and $(LD) is not used
@@ -33,9 +32,9 @@ AS := $(subst \,/,$(AS))
 # Figure out GAS version for use in *.S and inline asm compile flags
 #
 GAS_VERSION    := $(subst ., ,$(shell $(AS) --version))
-GAS_MAJOR      := $(word 3,$(GAS_VERSION))
-GAS_MINOR      := $(word 4,$(GAS_VERSION))
-GAS_MINORMINOR := $(word 5,$(GAS_VERSION))
+GAS_MAJOR      := $(word 1,$(GAS_VERSION))
+GAS_MINOR      := $(word 2,$(GAS_VERSION))
+GAS_MINORMINOR := $(word 3,$(GAS_VERSION))
 
 # Defaults for GAS version numbers
 ifeq ($(GAS_MAJOR),)

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