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Toolchain for armv5b (big-endian+soft-float) | |
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I used the crosstool (http://www.kegel.com/crosstool/) to build
gcc-3.3.2+glibc2.3.2 toolchain for armv5b with big endian and soft-float.
The .dat files and patches are attached.
I succeeded to build the toolchain. The kernel and busybox (statically
linked) are running properly. However, some daemons (samba, lpd, ftp
daemon...) core dump when I use shared library in these program. If the
program is statically linked, it has no problem.
Does anyone have the same experience?
---------------
armv5b.dat
---------------
KERNELCONFIG=$PWD/ixp425-config
TARGET=armv5b-linux
TARGET_CFLAGS="-O"
BINUTILS_DIR=binutils-2.14.90.0.7
BINUTILS_URL=http://www.kernel.org/pub/linux/devel/binutils
GCC_DIR=gcc-3.3.2
GCC_EXTRA_CONFIG="--nfp --without-fp --with-cpu=xscale --with-softfloat-supp
ort=internal --with-inhibit-libc"
GLIBC_DIR=glibc-2.3.2
LINUX_DIR=linux-2.4.x
GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.2
GLIBC_EXTRA_CONFIG="--nfp --with-cpu=xscale --without-fp"
--------------------------------
gcc-3.3.2-glibc-2.3.2.dat
--------------------------------
BINUTILS_DIR=binutils-2.14.90.0.5
BINUTILS_URL=http://www.kernel.org/pub/linux/devel/binutils
GCC_DIR=gcc-3.3.2
GLIBC_DIR=glibc-2.3.2
LINUX_DIR=linux-2.4.21
GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.2
------------------------
Patch for gcc-3.3.2
------------------------
diff -ubr gcc-3.3.2/gcc/config/arm/arm.h
../build/armv5b-linux/gcc-3.3.2-glibc-2.3.2/gcc-3.3.2/gcc/config/arm/arm.h
--- gcc-3.3.2/gcc/config/arm/arm.h 2002-11-15 19:21:36.000000000 +0800
+++ gcc-3.3.2/gcc/config/arm/arm.h 2003-11-22 17:58:15.000000000 +0800
@@ -577,9 +577,11 @@
extern int arm_is_6_or_7;
#ifndef TARGET_DEFAULT
-#define TARGET_DEFAULT (ARM_FLAG_APCS_FRAME)
+#define TARGET_DEFAULT (ARM_FLAG_APCS_FRAME | ARM_FLAG_SOFT_FLOAT)
#endif
+#define CPP_FLOAT_DEFAULT_SPEC "-D__SOFTFP__"
+
/* The frame pointer register used in gcc has nothing to do with debugging;
that is controlled by the APCS-FRAME option. */
#define CAN_DEBUG_WITHOUT_FP
diff -ubr gcc-3.3.2/gcc/config/arm/linux-elf.h
../build/armv5b-linux/gcc-3.3.2-glibc-2.3.2/gcc-3.3.2/gcc/config/arm/linux-e
lf.h
--- gcc-3.3.2/gcc/config/arm/linux-elf.h 2003-09-16 23:39:23.000000000 +0800
+++ gcc-3.3.2/gcc/config/arm/linux-elf.h 2003-11-22 18:01:43.000000000 +0800
@@ -32,13 +32,13 @@
/* Default is to use APCS-32 mode. */
#undef TARGET_DEFAULT
-#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
+#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS |
ARM_FLAG_BIG_END)
-#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
+#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p "
#undef MULTILIB_DEFAULTS
#define MULTILIB_DEFAULTS \
- { "marm", "mlittle-endian", "mhard-float", "mapcs-32",
"mno-thumb-interwork" }
+ { "marm", "mbig-endian", "msoft-float", "mapcs-32",
"mno-thumb-interwork" }
#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
@@ -52,7 +52,7 @@
%{shared:-lc} \
%{!shared:%{profile:-lc_p}%{!profile:-lc}}"
-#define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc"
+#define LIBGCC_SPEC "-lgcc"
/* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add
the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
@@ -86,7 +86,7 @@
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
-X \
- %{mbig-endian:-EB}" \
+ %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
SUBTARGET_EXTRA_LINK_SPEC
#define TARGET_OS_CPP_BUILTINS() \
@@ -111,8 +111,8 @@
while (0)
/* NWFPE always understands FPA instructions. */
-#undef FP_DEFAULT
-#define FP_DEFAULT FP_SOFT3
+
+
/* Call the function profiler with a given profile label. */
#undef ARM_FUNCTION_PROFILER
@@ -122,7 +122,9 @@
}
#undef CC1_SPEC
-#define CC1_SPEC "%{profile:-p}"
+#define CC1_SPEC "%{profile:-p} %{!msoft-float:-msoft-float}
%{!mbig-endian: -mbig-endian}"
+#undef ASM_SPEC
+#define ASM_SPEC "%{!mbig-endian: -EB} %{mcpu=*:-m%*} %{march=*:-m%*}
%{mapcs-*:-mapcs-%*} %{mapcs-float:-mfloat} %{!mno-fpu:-mno-fpu}
%{mthumb-interwork:-mthumb-interwork} %(subtarget_extra_asm_spec)"
#define LINK_GCC_C_SEQUENCE_SPEC \
"%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
diff -ubr gcc-3.3.2/gcc/config/arm/t-linux
../build/armv5b-linux/gcc-3.3.2-glibc-2.3.2/gcc-3.3.2/gcc/config/arm/t-linux
--- gcc-3.3.2/gcc/config/arm/t-linux 2001-05-17 11:15:49.000000000 +0800
+++ gcc-3.3.2/gcc/config/arm/t-linux 2003-11-22 17:54:14.000000000 +0800
@@ -9,8 +9,8 @@
LIB1ASMSRC = arm/lib1funcs.asm
LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx
-# MULTILIB_OPTIONS = mhard-float/msoft-float
-# MULTILIB_DIRNAMES = hard-float soft-float
+EXTRA_MULTILIB_PARTS = crtbegin.o crtbeginS.o crtend.o crtendS.o crti.o
crtn.o
+
# If you want to build both APCS variants as multilib options this is how
# to do it.
@@ -21,3 +21,35 @@
# LIBGCC = stmp-multilib
# INSTALL_LIBGCC = install-multilib
+
+FPBIT = fp-bit.c
+DPBIT = dp-bit.c
+
+fp-bit.c: $(srcdir)/config/fp-bit.c
+ echo '#define FLOAT' > fp-bit.c
+ echo '#ifndef __ARMEB__' >> fp-bit.c
+ echo '#define FLOAT_BIT_ORDER_MISMATCH' >> fp-bit.c
+ echo '#endif' >> fp-bit.c
+ cat $(srcdir)/config/fp-bit.c >> fp-bit.c
+
+dp-bit.c: $(srcdir)/config/fp-bit.c
+ echo '#ifndef __ARMEB__' > dp-bit.c
+ echo '#define FLOAT_BIT_ORDER_MISMATCH' >> dp-bit.c
+ echo '#define FLOAT_WORD_ORDER_MISMATCH' >> dp-bit.c
+ echo '#endif' >> dp-bit.c
+ cat $(srcdir)/config/fp-bit.c >> dp-bit.c
+
+# Currently there is a bug somewhere in GCC's alias analysis
+# or scheduling code that is breaking _fpmul_parts in fp-bit.c.
+# Disabling function inlining is a workaround for this problem.
+TARGET_LIBGCC2_CFLAGS = -Dinhibit_libc -fno-inline
+
+# Assemble startup files.
+$(T)crti.o: $(srcdir)/config/arm/crti.asm $(GCC_PASSES)
+ $(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
+ -c -o $(T)crti.o -x assembler-with-cpp $(srcdir)/config/arm/crti.asm
+
+$(T)crtn.o: $(srcdir)/config/arm/crtn.asm $(GCC_PASSES)
+ $(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
+ -c -o $(T)crtn.o -x assembler-with-cpp $(srcdir)/config/arm/crtn.asm
+
---------------------------
Patch for glibc-2.3.2
---------------------------
diff -ubr glibc-2.3.2/sysdeps/arm/strlen.S
/synosrc/crosstool-0.25/build/armv5b-linux/gcc-3.3.2-glibc-2.3.2/glibc-2.3.2
/sysdeps/arm/strlen.S
--- glibc-2.3.2/sysdeps/arm/strlen.S 2001-07-08 03:21:19.000000000 +0800
+++ glibc-2.3.2/sysdeps/arm/strlen.S 2003-11-20 11:36:31.000000000 +0800
@@ -53,11 +53,20 @@
ldrne r2, [r1], $4 @ and we continue to the next word
bne Laligned @
Llastword: @ drop through to here once we find a
+#ifdef __ARMEB__
+ tst r2, $0xff000000 @ word that has a zero byte in it
+ addne r0, r0, $1 @
+ tstne r2, $0x00ff0000 @ and add up to 3 bytes on to it
+ addne r0, r0, $1 @
+ tstne r2, $0x0000ff00 @ (if first three all non-zero, 4th
+ addne r0, r0, $1 @ must be zero)
+#else
tst r2, $0x000000ff @ word that has a zero byte in it
addne r0, r0, $1 @
tstne r2, $0x0000ff00 @ and add up to 3 bytes on to it
addne r0, r0, $1 @
tstne r2, $0x00ff0000 @ (if first three all non-zero, 4th
addne r0, r0, $1 @ must be zero)
+#endif
RETINSTR(mov,pc,lr)
END(strlen)
--------------------------------------
Patch for binutils-2.14.90.7
--------------------------------------
diff -ubr binutils-2.14.90.0.7/gas/configure
binutils-2.14.90.0.7.new/gas/configure
--- binutils-2.14.90.0.7/gas/configure 2003-10-30 01:37:48.000000000 +0800
+++ binutils-2.14.90.0.7/gas/configure 2003-11-22 18:22:11.000000000 +0800
@@ -3963,7 +3963,7 @@
am33_2.0) cpu_type=mn10300 endian=little ;;
alpha*) cpu_type=alpha ;;
arm*b|xscale*b|strongarm*b) cpu_type=arm endian=big ;;
- arm*|xscale*|strongarm*) cpu_type=arm endian=little ;;
+ arm*|xscale*|strongarm*) cpu_type=arm endian=big ;;
c4x*) cpu_type=tic4x ;;
hppa*) cpu_type=hppa ;;
i[3-7]86) cpu_type=i386 arch=i386;;
diff -ubr binutils-2.14.90.0.7/ld/configure.tgt
binutils-2.14.90.0.7.new/ld/configure.tgt
--- binutils-2.14.90.0.7/ld/configure.tgt 2003-10-30 01:37:48.000000000
+0800
+++ binutils-2.14.90.0.7/ld/configure.tgt 2003-11-22 18:21:22.000000000
+0800
@@ -255,7 +255,7 @@
arm-*-kaos*) targ_emul=armelf ;;
arm9e-*-elf) targ_emul=armelf ;;
arm-*-oabi) targ_emul=armelf_oabi ;;
-arm*b-*-linux-gnu*) targ_emul=armelfb_linux; targ_extra_emuls=armelfb ;;
+arm*b-*-linux-gnu*) targ_emul=armelf_linux; targ_extra_emuls=armelf ;;
arm*-*-linux-gnu*) targ_emul=armelf_linux; targ_extra_emuls=armelf ;;
arm*-*-uclinux*) targ_emul=armelf_linux; targ_extra_emuls=armelf ;;
arm*-*-conix*) targ_emul=armelf ;;
diff -ubr binutils-2.14.90.0.7/ld/emulparams/armelf_linux.sh
binutils-2.14.90.0.7.new/ld/emulparams/armelf_linux.sh
--- binutils-2.14.90.0.7/ld/emulparams/armelf_linux.sh 2003-10-30
01:37:48.000000000 +0800
+++ binutils-2.14.90.0.7/ld/emulparams/armelf_linux.sh 2003-11-22
18:19:43.000000000 +0800
@@ -1,6 +1,6 @@
ARCH=arm
SCRIPT_NAME=elf
-OUTPUT_FORMAT="elf32-littlearm"
+OUTPUT_FORMAT="elf32-bigarm"
BIG_OUTPUT_FORMAT="elf32-bigarm"
LITTLE_OUTPUT_FORMAT="elf32-littlearm"
MAXPAGESIZE=0x8000
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