diff options
Diffstat (limited to 'libc/sysdeps/linux/powerpc')
| -rw-r--r-- | libc/sysdeps/linux/powerpc/Makefile | 21 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/crt1.S | 95 |
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 + |