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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2005-05-21 21:31:36 +0000
committerJoakim Tjernlund <joakim.tjernlund@transmode.se>2005-05-21 21:31:36 +0000
commit4ef1c28c03dd19637272d5fc40ee7fabfec92e0d (patch)
tree25714a0cb40c764d5650b35f71b480271d697873
parente3006e038e293a5d52627c9200316acee37ec5fb (diff)
Update PowerPC to new ABI.
-rw-r--r--libc/sysdeps/linux/powerpc/Makefile21
-rw-r--r--libc/sysdeps/linux/powerpc/crt1.S95
2 files changed, 102 insertions, 14 deletions
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
+