2006-12-08 Sa Liu <saliu@de.ibm.com>

        * spu/exit.c (libgloss_exit): Rename from this ..
        (_exit): .. to this. Overhaul.
        (exit): Remove.
        * spu/crt0.S, spu/crti.S, spu/crtn.S: New files.
        * spu/crt0.C, spu/init.c: Remove.
        * spu/configure.in (AC_INIT): Check for crt0.S, not crt0.C.
        * spu/configure: Regenerate.
        * spu/Makefile.in (crti.o, crtn.o, crt1.o, crt2.o): New targets.
        (OBJS): Remove init.o.
        (CRTOBJS): New.
        (OUTPUTS): Add $(CRTOBJS).

9 files changed, 323 insertions, 86 deletions

diff --git a/libgloss/ChangeLog b/libgloss/ChangeLog
index 2dfba1513..675866b37 100644
--- a/libgloss/ChangeLog
+++ b/libgloss/ChangeLog
@@ -1,4 +1,18 @@
-2006-11-27  Jeff Johnston  <jjohnstn@redhat.com>
+2006-12-08  Sa Liu  <saliu@de.ibm.com>
+
+        * spu/exit.c (libgloss_exit): Rename from this ..
+        (_exit): .. to this. Overhaul.
+        (exit): Remove.
+        * spu/crt0.S, spu/crti.S, spu/crtn.S: New files.
+        * spu/crt0.C, spu/init.c: Remove.
+        * spu/configure.in (AC_INIT): Check for crt0.S, not crt0.C.
+        * spu/configure: Regenerate.
+        * spu/Makefile.in (crti.o, crtn.o, crt1.o, crt2.o): New targets.
+        (OBJS): Remove init.o.
+        (CRTOBJS): New.
+        (OUTPUTS): Add $(CRTOBJS).
+
+I2006-11-27  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* mips/crt0.S: Fix preprocessor statements from previous patch
 	to be ANSI.
diff --git a/libgloss/spu/Makefile.in b/libgloss/spu/Makefile.in
index e9d79b57d..b147bda5d 100644
--- a/libgloss/spu/Makefile.in
+++ b/libgloss/spu/Makefile.in
@@ -54,7 +54,7 @@ OBJDUMP = `t='$(program_transform_name)'; echo objdump | sed -e $$t`
 OBJCOPY = `t='$(program_transform_name)'; echo objcopy | sed -e $$t`
 
 # object files needed
-OBJS = syscalls.o init.o exit.o sbrk.o close.o fstat.o getpid.o isatty.o \
+OBJS = syscalls.o exit.o sbrk.o close.o fstat.o getpid.o isatty.o \
 	kill.o lseek.o open.o read.o unlink.o write.o stat.o
 
 # Object files specific to particular targets.
@@ -63,7 +63,8 @@ EVALOBJS = ${OBJS}
 GCC_LDFLAGS = `if [ -d ${objroot}/../gcc ] ; \
 	then echo -L${objroot}/../gcc ; fi`
 
-OUTPUTS = libgloss.a crt0.o
+CRTOBJS = crti.o crtn.o crt1.o crt2.o
+OUTPUTS = libgloss.a $(CRTOBJS)
 
 NEWLIB_CFLAGS = `if [ -d ${objroot}/newlib ]; then echo -I${objroot}/newlib/targ-include -I${srcroot}/newlib/libc/include; fi` -ffunction-sections -fdata-sections
 NEWLIB_LDFLAGS = `if [ -d ${objroot}/newlib ]; then echo -B${objroot}/newlib/ -L${objroot}/newlib/; fi`
@@ -111,6 +112,19 @@ libgloss.a: $(EVALOBJS)
 	${AR} ${ARFLAGS} $@ $(EVALOBJS)
 	${RANLIB} $@
 
+# C Runtime Library startup code.
+crti.o:
+	$(CC) $(srcdir)/crti.S -c -o crti.o 
+
+crtn.o:
+	$(CC) $(srcdir)/crtn.S -c -o crtn.o 
+
+crt1.o:
+	$(CC) $(srcdir)/crt0.S -c -o crt1.o
+
+crt2.o:
+	$(CC) $(srcdir)/crt0.S -D_STD_MAIN -c -o crt2.o
+
 doc:	
 
 clean mostlyclean:
diff --git a/libgloss/spu/configure b/libgloss/spu/configure
index 9bf12dc98..d339f1b56 100644
--- a/libgloss/spu/configure
+++ b/libgloss/spu/configure
@@ -271,7 +271,7 @@ PACKAGE_VERSION=
 PACKAGE_STRING=
 PACKAGE_BUGREPORT=
 
-ac_unique_file="crt0.c"
+ac_unique_file="crt0.S"
 ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CC am__leading_dot DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE AS AR LD RANLIB ac_ct_RANLIB CCAS CCASFLAGS host_makefile_frag_path LIBOBJS LTLIBOBJS'
 ac_subst_files='host_makefile_frag'
 
diff --git a/libgloss/spu/configure.in b/libgloss/spu/configure.in
index 992e23383..3f18736c7 100644
--- a/libgloss/spu/configure.in
+++ b/libgloss/spu/configure.in
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.59)dnl
-AC_INIT(crt0.c)
+AC_INIT(crt0.S)
 
 if test "$srcdir" = "." ; then
   if test "${with_target_subdir}" != "." ; then
diff --git a/libgloss/spu/crt0.S b/libgloss/spu/crt0.S
new file mode 100644
index 000000000..76d8a9949
--- /dev/null
+++ b/libgloss/spu/crt0.S
@@ -0,0 +1,168 @@
+/* (C) Copyright IBM Corp. 2005, 2006
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, 
+this list of conditions and the following disclaimer.
+    * 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.
+    * Neither the name of IBM 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 HOLDERS 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 OWNER 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.
+*/
+
+/* crt0.S - entry function for C Runtime.
+ *
+ * With _STD_MAIN switch, the crt0.S will be compiled to crt2.o.
+ * The crt2.o sets up a C99-style interface for the SPU application's
+ * main() function, including a local copy of argv strings.
+ * 
+ * The number of argument strings is passed in R3.  The size and EA 
+ * location of the argument vector region is passed in R4.  Once the
+ * argv region is copied to the highest range of LS, and $SP is set 
+ * just below it.
+ *
+ * Without _STD_MAIN, the crt0.S is compiled to crt1.o. 
+ * The crt1.o prepares the entry for an SPU module. The main() function
+ * is called with different parameter list: spu_id, param and env 
+ * are passed by R3, R4 and R5 respectively.
+ */
+
+#ifdef _STD_MAIN
+#define MFC_TAG_UPDATE_ALL 	2
+#define MFC_GET_CMD		0x40
+#define TAGID			0
+#define TAGMASK			1
+#endif
+
+.text
+.global _start
+.type _start, @function
+	
+_start:
+#ifdef _STD_MAIN
+	/* 
+ 	 * Copy the argument vector region from EA to LS.  The DMA
+	 * parameters are passed in R4:
+	 *
+ 	 *        +-------+-------+-------+-------+
+	 *     R4 |   LS  | EA-HI | EA-LO | SIZE  |
+	 *        +-------+-------+-------+-------+
+	 *  word     0       1       2       3
+	 *
+ 	 * By the end of this sequence, the prefered slot (word 0) of
+	 * R4 will contain the LS offset of argv region, which also
+	 * serves as the base offset for $SP.
+	 */
+	wrch	$MFC_LSA, $4
+	rotqbyi	$4, $4, 4
+	wrch	$MFC_EAH, $4
+	rotqbyi	$4, $4, 4
+	wrch	$MFC_EAL, $4
+	rotqbyi	$4, $4, 4
+	wrch	$MFC_Size, $4
+	rotqbyi	$4, $4, 4
+	il	$LR, TAGID
+	wrch	$MFC_TagID, $LR
+
+	/* Issue MFC_GET_CMD, then wait for transfer of argument
+	 * vector region to complete.
+	 */
+	il	$LR, MFC_GET_CMD
+	wrch	$MFC_Cmd, $LR
+	il	$LR, TAGMASK
+	wrch	$MFC_WrTagMask, $LR
+	il	$LR, MFC_TAG_UPDATE_ALL
+	wrch	$MFC_WrTagUpdate, $LR
+	rdch	$LR, $MFC_RdTagStat
+#endif
+
+	/* Save parameter list of main function to the non-volatile
+	 * registers. spu_thread module has three parameters, while
+	 * spulet only has two.
+	 */
+	ori     $80, $3, 0
+	ori     $81, $4, 0
+#ifndef _STD_MAIN
+	ori 	$82, $5, 0
+#endif
+
+	/* The Link Register is initialized to NULL.
+	 */
+	il	$LR, 0
+
+#ifdef _STD_MAIN	
+	/* For spulet, initialize stack pointer just below the argv region.
+	 */
+	ai	$SP,$4,-16
+#else
+	/* For spe_thread module, the stack pointer is initialized 
+	 * below the area where __stack points to.
+	 */
+	ila     $SP,__stack
+#endif
+	/* Initialize back chain to NULL.
+	 */
+	stqd    $LR,0($SP)
+
+	/* Allocate 2 slots for stack frame.
+	 */
+	stqd    $SP,-32($SP)
+	ai      $SP,$SP,-32
+
+	/* Save the Link Register in Link Register Save Area.
+	 */
+	stqd	$LR,16($SP)
+
+	/* Calculate stack size.
+	 */
+	ila 	$3,_end
+	sf	$3,$3,$SP
+
+        /* The BE Linux ABI passes the stack size in $2, or use
+         * the default if $2 == 0.
+         */
+	rotqbyi	$4,$2,12
+	ceqi	$5,$4,0
+	selb	$3,$4,$3,$5
+	fsmbi	$4,3840
+	selb	$SP,$SP,$3,$4
+
+	/* Call the _init function.
+	 */
+	brsl	$LR, _init
+	
+	/* Call the _fini function at exit time.
+	 */
+	ila	$3, _fini
+	brsl	$LR, atexit
+
+	ori     $3,$80,0
+	ori     $4,$81,0	
+#ifndef _STD_MAIN
+	ori	$5,$82,0
+#endif
+
+	/* Call the programs main.
+	 */
+	brsl	$LR, main
+	
+	/* Call exit.
+	 */
+	brsl	$LR, exit
+
diff --git a/libgloss/spu/crti.S b/libgloss/spu/crti.S
new file mode 100644
index 000000000..8e7f55d57
--- /dev/null
+++ b/libgloss/spu/crti.S
@@ -0,0 +1,66 @@
+# (C) Copyright IBM Corp. 2005, 2006
+# 
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without 
+# modification, are permitted provided that the following conditions are met:
+# 
+#     * Redistributions of source code must retain the above copyright notice, 
+# this list of conditions and the following disclaimer.
+#     * 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.
+#     * Neither the name of IBM 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 HOLDERS 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 OWNER 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.
+#
+# This file just make a stack frame for the contents of the .fini and
+# .init sections.  Users may put any desired instructions in those
+# sections.
+
+	# Note - this macro is complimented by the FUNC_END macro
+	# in crtn.S.  If you change this macro you must also change
+	# that macro match.
+.macro FUNC_START
+	# Create a stack frame with two slots: LR and BC
+	# The .init and .fini section don't change the call-preserved 
+	# registes, therefore no need to save them.
+	stqd    $lr, 16($sp)
+	stqd    $sp, -32($sp)
+	ai      $sp, $sp, -32
+.endm
+		
+	.file		"crti.S"
+
+	.section	".init"
+	.align 2
+
+        # To make sure the address of _init is not zero, because
+        # the default linker entry point is 0.       
+        nop
+
+	.global	_init
+	.type	_init, @function
+_init:
+	FUNC_START
+	
+		
+	.section	".fini"
+	.align	2
+	.global	_fini
+	.type	_fini, @function
+_fini:
+	FUNC_START
+	
diff --git a/libgloss/spu/crtn.S b/libgloss/spu/crtn.S
new file mode 100644
index 000000000..8812f1f3e
--- /dev/null
+++ b/libgloss/spu/crtn.S
@@ -0,0 +1,56 @@
+# (C) Copyright IBM Corp. 2005, 2006
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#     * Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#     * 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.
+#     * Neither the name of IBM 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 HOLDERS 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 OWNER 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.
+#
+# This file just makes sure that the .fini and .init sections do in
+# fact return.  Users may put any desired instructions in those sections.
+# This file is the last thing linked into any executable.
+
+	# Note - this macro is complimented by the FUNC_START macro
+	# in crti.S.  If you change this macro you must also change
+	# that macro match.
+	#
+	# Note - we do not try any fancy optimisations of the return
+	# sequences here, it is just not worth it.  Instead keep things
+	# simple.  The link register is restored and then the correct 
+	# function return instruction is performed.
+.macro FUNC_END
+	ai      $sp, $sp, 32
+	lqd     $lr, 16($sp)
+	bi	$lr
+.endm
+	.file		"crtn.S"
+
+	.section	".init"
+
+	FUNC_END
+	
+	.section	".fini"
+	
+	FUNC_END
+	
+# end of crtn.S
diff --git a/libgloss/spu/exit.c b/libgloss/spu/exit.c
deleted file mode 100644
index 669338822..000000000
--- a/libgloss/spu/exit.c
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
-(C) Copyright IBM Corp. 2005, 2006
-
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without 
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright notice, 
-this list of conditions and the following disclaimer.
-    * 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.
-    * Neither the name of IBM 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 HOLDERS 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 OWNER 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.
-
-Author: Andreas Neukoetter (ti95neuk@de.ibm.com)
-*/
-
-void __attribute__ (( destructor )) libgloss_exit( void )
-{
-	/* we don't need any cleanup on the SPE ... yet */
-	/* DEBUG HERE */
-}
-
-void exit( int status )
-{
-	/* handle atexit, etc here */
-	_exit( status );
-}
-
diff --git a/libgloss/spu/init.c b/libgloss/spu/init.c
deleted file mode 100644
index 66d6a25f5..000000000
--- a/libgloss/spu/init.c
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
-(C) Copyright IBM Corp. 2005, 2006
-
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without 
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright notice, 
-this list of conditions and the following disclaimer.
-    * 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.
-    * Neither the name of IBM 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 HOLDERS 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 OWNER 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.
-
-Author: Andreas Neukoetter (ti95neuk@de.ibm.com)
-*/
-
-void __attribute__ (( constructor )) libgloss_init( void )
-{
-
-}
-