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Re: Build libxil.a and xil-*crt0.o for powerpc-xilinx-eabi
- From: Michael Eager <eager at eagercon dot com>
- To: Jeff Johnston <jjohnstn at redhat dot com>
- Cc: Newlib <newlib at sourceware dot org>
- Date: Fri, 05 Jun 2009 15:47:25 -0700
- Subject: Re: Build libxil.a and xil-*crt0.o for powerpc-xilinx-eabi
- References: <4A022606.1010809@eagercon.com> <4A0331E0.8050302@redhat.com>
Jeff Johnston wrote:
Michael Eager wrote:
Attached is a patch which adds xil-crt0.S, source
for xil-*crt0.o, and builds libxil.a. For Xilinx
PowerPC 405/440.
Michael,
I'm afraid the licensing of xil-crt0.S isn't adequate. IANAL, but to me
it just says that it might contain infringements and you are responsible
for figuring this out. It doesn't provide usage rights (i.e. free to
copy/modify/etc..). This is not sufficient for checking into newlib.
Can you possibly contact the supplier of this code to see if it can be
licensed under a simple BSD-style license. Similar comments apply to
any other code using that license. If there is question as to who wrote
the code and whether it is infringing on patents, then it cannot be
checked in. I am surprised that sort of license would be used for a
simple start-up file.
The attached patch as a BSD-like license.
--
Michael Eager eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
2009-06-04 Michael Eager <eager@eagercon.com>
* COPYING.NEWLIB: Add Xilinx license.
* libgloss/rs6000/Makefile.in: Build libxil.a.
* libgloss/rs6000/xil-crt0.s: New. Crt0 file for powerpc-xilinx-eabi.
diff -urNp --exclude '*.swp' --exclude DEV-PHASE --exclude .svn newlib-orig/COPYING.NEWLIB newlib/COPYING.NEWLIB
--- newlib-orig/COPYING.NEWLIB 2009-06-05 13:43:53.000000000 -0700
+++ newlib/COPYING.NEWLIB 2009-06-05 14:02:48.000000000 -0700
@@ -798,3 +798,34 @@ SUCH DAMAGE.
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+(36) - Xilinx, Inc.
+
+Copyright (c) 2004, 2009 Xilinx, Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1. Redistributions source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+3. Neither the name of Xilinx nor the names of its contributors may be
+used to endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
diff -urNp --exclude '*.swp' --exclude DEV-PHASE --exclude .svn newlib-orig/libgloss/rs6000/Makefile.in newlib/libgloss/rs6000/Makefile.in
--- newlib-orig/libgloss/rs6000/Makefile.in 2009-06-05 13:43:51.000000000 -0700
+++ newlib/libgloss/rs6000/Makefile.in 2009-06-05 13:55:15.000000000 -0700
@@ -121,6 +121,14 @@ MBX_OBJS = open.o close.o lseek.o sbrk.o
MBX_TEST = mbx-test
MBX_INSTALL = install-mbx
+XIL_SCRIPTS = xilinx.ld
+XIL_SPECS =
+XIL_CRT0 = xil-crt0.o xil-pgcrt0.o xil-sim-crt0.o xil-sim-pgcrt0.o
+XIL_BSP = libxil.a
+XIL_OBJS = open.o close.o lseek.o sbrk.o read.o write.o print.o xil-exit.o
+XIL_TEST = xil-test
+XIL_INSTALL = install-xil
+
# Host specific makefile fragment comes in here.
@host_makefile_frag@
@@ -135,7 +143,8 @@ all: \
${LINUX_CRT0} ${LINUX_BSP} \
${YELLOWKNIFE_CRT0} ${YELLOWKNIFE_BSP} \
${ADS_CRT0} ${ADS_BSP} \
- ${MBX_CRT0} ${MBX_BSP}
+ ${MBX_CRT0} ${MBX_BSP} \
+ ${XIL_CRT0} ${XIL_BSP}
#
# here's where we build the board support packages for each target
@@ -169,11 +178,15 @@ ${MBX_BSP}: ${OBJS} ${MBX_OBJS}
${AR} ${ARFLAGS} $@ ${MBX_OBJS} ${OBJS}
${RANLIB} $@
+${XIL_BSP}: ${OBJS} ${XIL_OBJS}
+ ${AR} ${ARFLAGS} $@ ${XIL_OBJS} ${OBJS}
+ ${RANLIB} $@
+
#
# here's where we build the test programs for each target
#
.PHONY: test
-test: ${SIM_TEST} ${MVME_TEST} ${YELLOWKNIFE_TEST} ${ADS_TEST} ${MBX_TEST}
+test: ${SIM_TEST} ${MVME_TEST} ${YELLOWKNIFE_TEST} ${ADS_TEST} ${MBX_TEST} ${XIL_TEST}
sim-test: sim-test.x sim-test.dis
@@ -263,6 +276,19 @@ mbx-test.dis: mbx-test.x
mbx-test.srec: mbx-test.x
${OBJCOPY} -O srec mbx-test.x mbx-test.srec
+xil-test: xil-test.x xil-test.dis xil-test.srec
+
+xil-test.x: test.o ${XIL_CRT0} ${XIL_BSP}
+ ${CC} ${LDFLAGS_FOR_TARGET} -L${objdir} \
+ -T${srcdir}/xilinx.ld ${XIL_CRT0} test.o \
+ -o xil-test.x $(LIBS_FOR_TARGET) ${XIL_BSP} -lc ${XIL_BSP}
+
+xil-test.dis: xil-test.x
+ ${OBJDUMP} -d xil-test.x > xil-test.dis
+
+xil-test.srec: xil-test.x
+ ${OBJCOPY} -O srec xil-test.x xil-test.srec
+
#
#
#
@@ -286,6 +312,20 @@ mbx-inbyte.o: mbx-inbyte.c
mbx-outbyte.o: mbx-outbyte.c
mbx-print.o: mbx-print.c
+xil-exit.o: xil-exit.c
+
+xil-crt0.o: xil-crt0.S
+ ${CC} -c -o $@ $<
+
+xil-pgcrt0.o: xil-crt0.S
+ ${CC} -c -DPROFILING -o $@ $<
+
+xil-sim-crt0.o: xil-crt0.S
+ ${CC} -c -DSIMULATOR -o $@ $<
+
+xil-sim-pgcrt0.o: xil-crt0.S
+ ${CC} -c -DSIMULATOR -DPROFILING -o $@ $<
+
sol-cfuncs.o: sol-cfuncs.c
sol-syscall.o: sol-syscall.S
@@ -314,7 +354,7 @@ distclean maintainer-clean realclean: cl
rm -f Makefile config.status *~
.PHONY: install info install-info clean-info
-install: ${SIM_INSTALL} ${MVME_INSTALL} ${SOLARIS_INSTALL} ${LINUX_INSTALL} ${YELLOWKNIFE_INSTALL} ${ADS_INSTALL} ${MBX_INSTALL}
+install: ${SIM_INSTALL} ${MVME_INSTALL} ${SOLARIS_INSTALL} ${LINUX_INSTALL} ${YELLOWKNIFE_INSTALL} ${ADS_INSTALL} ${MBX_INSTALL} ${XIL_INSTALL}
install-sim:
set -e; for x in ${SIM_CRT0} ${SIM_BSP} ${SIM_SCRIPTS}; do ${INSTALL_DATA} $$x $(DESTDIR)${tooldir}/lib${MULTISUBDIR}/$$x; done
@@ -340,6 +380,10 @@ install-mbx:
set -e; for x in ${MBX_CRT0} ${MBX_BSP}; do ${INSTALL_DATA} $$x $(DESTDIR)${tooldir}/lib${MULTISUBDIR}/$$x; done
set -e; for x in ${MBX_SCRIPTS} ${MBX_SPECS}; do ${INSTALL_DATA} $(srcdir)/$$x $(DESTDIR)${tooldir}/lib${MULTISUBDIR}/$$x; done
+install-xil:
+ set -e; for x in ${XIL_CRT0} ${XIL_BSP}; do ${INSTALL_DATA} $$x $(DESTDIR)${tooldir}/lib/$$x; done
+ set -e; for x in ${XIL_SCRIPTS} ${XIL_SPECS}; do ${INSTALL_DATA} $(srcdir)/$$x $(DESTDIR)${tooldir}/lib/$$x; done
+
doc:
info:
install-info:
diff -urNp --exclude '*.swp' --exclude DEV-PHASE --exclude .svn newlib-orig/libgloss/rs6000/xil-crt0.S newlib/libgloss/rs6000/xil-crt0.S
--- newlib-orig/libgloss/rs6000/xil-crt0.S 1969-12-31 16:00:00.000000000 -0800
+++ newlib/libgloss/rs6000/xil-crt0.S 2009-06-05 14:00:35.000000000 -0700
@@ -0,0 +1,192 @@
+/*-----------------------------------------------------------------------------
+//
+// Copyright (c) 2004, 2009 Xilinx, Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// 1. Redistributions source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// 3. Neither the name of Xilinx nor the names of its contributors may be
+// used to endorse or promote products derived from this software without
+// specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//---------------------------------------------------------------------------*/
+
+ .file "xil-crt0.S"
+ .section ".got2","aw"
+ .align 2
+
+.LCTOC1 = . + 32768
+
+.Lsbss_start = .-.LCTOC1
+ .long __sbss_start
+
+.Lsbss_end = .-.LCTOC1
+ .long __sbss_end
+
+.Lbss_start = .-.LCTOC1
+ .long __bss_start
+
+.Lbss_end = .-.LCTOC1
+ .long __bss_end
+
+.Lstack = .-.LCTOC1
+ .long __stack
+
+.Lsda = .-.LCTOC1
+ .long _SDA_BASE_ /* address of the first small data area */
+
+.Lsda2 = .-.LCTOC1
+ .long _SDA2_BASE_ /* address of the second small data area */
+
+
+ .text
+ .globl _start
+_start:
+ bl __cpu_init /* Initialize the CPU first (BSP provides this) */
+
+ lis 5,.LCTOC1@h
+ ori 5,5,.LCTOC1@l
+
+ lwz 13,.Lsda(5) /* load r13 with _SDA_BASE_ address */
+ lwz 2,.Lsda2(5) /* load r2 with _SDA2_BASE_ address */
+
+#ifndef SIMULATOR
+ /* clear sbss */
+ lwz 6,.Lsbss_start(5) /* calculate beginning of the SBSS */
+ lwz 7,.Lsbss_end(5) /* calculate end of the SBSS */
+
+ cmplw 1,6,7
+ bc 4,4,.Lenclsbss /* If no SBSS, no clearing required */
+
+ li 0,0 /* zero to clear memory */
+ subf 8,6,7 /* number of bytes to zero */
+ srwi. 9,8,2 /* number of words to zero */
+ beq .Lstbyteloopsbss /* Check if the number of bytes was less than 4 */
+ mtctr 9
+ addi 6,6,-4 /* adjust so we can use stwu */
+.Lloopsbss:
+ stwu 0,4(6) /* zero sbss */
+ bdnz .Lloopsbss
+
+.Lstbyteloopsbss:
+ andi. 9,8,3 /* Calculate how many trailing bytes we have */
+ beq 0,.Lenclsbss
+ mtctr 9
+ addi 6,6,-1 /* adjust, so we can use stbu */
+
+.Lbyteloopsbss:
+ stbu 0,1(6)
+ bdnz .Lbyteloopsbss
+
+.Lenclsbss:
+.Lstclbss:
+
+ /* clear bss */
+ lwz 6,.Lbss_start(5) /* calculate beginning of the BSS */
+ lwz 7,.Lbss_end(5) /* calculate end of the BSS */
+
+ cmplw 1,6,7
+ bc 4,4,.Lenclbss /* If no BSS, no clearing required */
+
+ li 0,0 /* zero to clear memory */
+ subf 8,6,7 /* number of bytes to zero */
+ srwi. 9,8,2 /* number of words to zero */
+ beq .Lstbyteloopbss /* Check if the number of bytes was less than 4 */
+ mtctr 9
+ addi 6,6,-4 /* adjust so we can use stwu */
+.Lloopbss:
+ stwu 0,4(6) /* zero bss */
+ bdnz .Lloopbss
+
+.Lstbyteloopbss:
+ andi. 9,8,3 /* Calculate how many trailing bytes we have */
+ beq 0,.Lenclbss /* If zero, we are done */
+ mtctr 9
+ addi 6,6,-1 /* adjust, so we can use stbu */
+
+.Lbyteloopbss:
+ stbu 0,1(6)
+ bdnz .Lbyteloopbss
+
+.Lenclbss:
+#endif /* SIMULATOR */
+
+ /* set stack pointer */
+ lwz 1,.Lstack(5) /* stack address */
+
+ /* set up initial stack frame */
+ addi 1,1,-8 /* location of back chain */
+ lis 0,0
+ stw 0,0(1) /* set end of back chain */
+
+ /* initialize base timer to zero */
+ mtspr 0x11c,0
+ mtspr 0x11d,0
+
+#ifdef HAVE_XFPU
+ /* On the Xilinx PPC405 and PPC440, the MSR
+ must be explicitly set to mark the prescence
+ of an FPU */
+ mfpvr 0
+ rlwinm 0,0,0,12,15
+ cmpwi 7,0,8192
+ mfmsr 0
+ ori 0,0,8192
+ beq- 7,fpu_init_done
+do_405:
+ oris 0,0,512
+fpu_init_done:
+ mtmsr 0
+#endif
+
+#ifdef PROFILING
+ /* Setup profiling stuff */
+ bl _profile_init
+#endif /* PROFILING */
+
+ /* Call __init */
+ bl __init
+
+ /* Let her rip */
+ bl main
+
+ /* Invoke the language cleanup functions */
+ bl __fini
+
+#ifdef PROFILING
+ /* Cleanup profiling stuff */
+ bl _profile_clean
+#endif /* PROFILING */
+
+ /* Call __init */
+ /* All done */
+ bl exit
+
+/* Trap has been removed for both simulation and hardware */
+ .globl _exit
+_exit:
+ b _exit
+
+.Lstart:
+ .size _start,.Lstart-_start
+