From 4ef1c28c03dd19637272d5fc40ee7fabfec92e0d Mon Sep 17 00:00:00 2001
From: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Date: Sat, 21 May 2005 21:31:36 +0000
Subject: Update PowerPC to new ABI.

---
 libc/sysdeps/linux/powerpc/Makefile | 21 +++-----
 libc/sysdeps/linux/powerpc/crt1.S   | 95 +++++++++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+), 14 deletions(-)
 create mode 100644 libc/sysdeps/linux/powerpc/crt1.S

(limited to 'libc/sysdeps/linux/powerpc')

diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index 25cb7047d..eb212bac0 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -19,10 +19,9 @@
 TOPDIR=../../../../
 include $(TOPDIR)Rules.mak
 
-CRT0_SRC = crt0.S
-CRT0_OBJ = crt0.o crt1.o
-SCRT0_OBJ = $(patsubst %,S%, $(CRT0_OBJ))
-CRT0_DEPS=gmon-start.S
+CRT_SRC = crt1.S
+CRT_OBJ = crt1.o
+SCRT_OBJ = $(patsubst %,S%, $(CRT_OBJ))
 CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
 
 SSRC=__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S \
@@ -38,21 +37,16 @@ OBJ_LIST=../../../obj.sysdeps.$(TARGET_ARCH)
 
 all: $(OBJ_LIST)
 
-$(OBJ_LIST): $(OBJS) $(CRT0_OBJ) $(SCRT0_OBJ) $(CTOR_TARGETS)
+$(OBJ_LIST): $(OBJS) $(CRT_OBJ) $(SCRT_OBJ) $(CTOR_TARGETS)
 	echo $(patsubst %, sysdeps/linux/$(TARGET_ARCH)/%, $(OBJS)) > $(OBJ_LIST)
 	$(INSTALL) -d $(TOPDIR)lib/
-	cp $(CRT0_OBJ) $(SCRT0_OBJ) $(TOPDIR)lib/
-ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
-	$(RM) $(TOPDIR)lib/Scrt0.o
-else
-	mv $(TOPDIR)lib/Scrt0.o $(TOPDIR)lib/Scrt1.o
-endif
+	cp $(CRT_OBJ) $(SCRT_OBJ) $(TOPDIR)lib/
 
-$(CRT0_OBJ): $(CRT0_SRC)
+$(CRT_OBJ): $(CRT_SRC)
 	$(CC) $(ASFLAGS) -DL_$* $< -c -o $*.o
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
-$(SCRT0_OBJ): $(CRT0_SRC)
+$(SCRT_OBJ): $(CRT_SRC)
 	$(CC) $(ASFLAGS) $(PIEFLAG) -DL_$* $< -c -o $*.o
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
@@ -94,4 +88,3 @@ headers:
 clean:
 	$(RM) *.[oa] *~ core
 	$(RM) bits/sysnum.h
-	$(RM) gmon-start.S
diff --git a/libc/sysdeps/linux/powerpc/crt1.S b/libc/sysdeps/linux/powerpc/crt1.S
new file mode 100644
index 000000000..42040e2ee
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/crt1.S
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2003 by Erik Andersen
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program 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 Library General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* Integer registers.  */
+#define r0      0
+#define r1      1
+#define r2      2
+#define r3      3
+#define r4      4
+#define r5      5
+#define r6      6
+#define r7      7
+#define r8      8
+#define r9      9
+#define r13     13
+#define r31     31
+
+#include <features.h>
+
+	.section ".text"
+	.globl	_start
+	.type	_start,@function
+	.weak	_init
+	.weak	_fini
+	.type	__uClibc_start_main,%function
+
+/* Stick in a dummy reference to main(), so that if an application
+ * is linking when the main() function is in a static library (.a)
+ * we can be sure that main() actually gets linked in */
+	.type	main,%function
+
+_start:
+	/* Save the stack pointer, in case we're statically linked under Linux.  */
+	mr	r9,r1
+#if defined L_Scrt1
+	bl	_GLOBAL_OFFSET_TABLE_-4@local
+	mflr	r31
+#endif
+	/* Set up an initial stack frame, and clear the LR.  */
+	clrrwi	r1,r1,4
+	li	r0,0
+	stwu	r1,-16(r1)
+	mtlr	r0
+	stw	r0,0(r1)
+
+	/* find argc from the stack pointer */
+	lwz	r3,0(r9)
+	/* find argv one word offset from the stack pointer */
+	addi	r4,r9,4
+	/* find environment pointer (argv+argc+1) */
+	lwz	r5,0(r9)
+	addi	r5,r5,1
+	rlwinm	r5,r5,2,0,29
+	add	r5,r5,r4
+	mr	r9,r7 /* Pass _dl_fini from ldso */
+	/* Ok, now run uClibc's main() -- shouldn't return */
+# ifdef L_Scrt1
+	lwz	r6,_init@got(r31)
+	lwz	r7,_fini@got(r31)
+	lwz	r8,main@got(r31)
+	b	__uClibc_start_main@plt
+# else
+	lis     r6,_init@ha	# load top 16 bits
+	addi    r6,r6,_init@l	# load bottom 16 bits
+	lis     r7,_fini@ha	# load top 16 bits of &msg
+	addi    r7,r7,_fini@l	# load bottom 16 bits
+	lis     r8,main@ha	# load top 16 bits of &msg
+	addi    r8,r8,main@l	# load bottom 16 bits
+	b	__uClibc_start_main
+# endif
+.size _start,.-_start
+
+/* Define a symbol for the first piece of initialized data.  */
+	.data
+	.globl __data_start
+__data_start:
+	.long 0
+	.weak data_start
+	data_start = __data_start
+
-- 
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