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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2004-08-27 15:14:55 +0000
committerJoakim Tjernlund <joakim.tjernlund@transmode.se>2004-08-27 15:14:55 +0000
commitc9a8697e5b02b390e3cb14ba787998459af2aac5 (patch)
treef58cbbfbda73b44aa21bef547f38855cae3311d9 /libc/sysdeps
parentd6ea3852863b744ad86802f0a1ebe4d596286a3e (diff)
Preliminary PIE support for powerpc, i386 was used as template.
Requested by Peter Mazinger. Testing wanted.
Diffstat (limited to 'libc/sysdeps')
-rw-r--r--libc/sysdeps/linux/powerpc/Makefile10
-rw-r--r--libc/sysdeps/linux/powerpc/crt0.S19
2 files changed, 26 insertions, 3 deletions
diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index 93f447137..cf8be499e 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -22,6 +22,9 @@ ASFLAGS=$(CFLAGS)
CRT0_SRC = crt0.S
CRT0_OBJ = crt0.o crt1.o
+ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
+CRT0_OBJ += Scrt0.o Scrt1.o
+endif
CRT0_DEPS=gmon-start.S
CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
@@ -41,6 +44,13 @@ $(LIBC): ar-target
ar-target: $(OBJS) $(CRT0_OBJ) $(CTOR_TARGETS)
$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
cp $(CRT0_OBJ) $(TOPDIR)lib/
+ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
+ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
+ $(RM) $(TOPDIR)lib/Scrt0.o
+else
+ mv $(TOPDIR)lib/Scrt0.o $(TOPDIR)lib/Scrt1.o
+endif
+endif
$(CRT0_OBJ): $(CRT0_SRC)
$(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
diff --git a/libc/sysdeps/linux/powerpc/crt0.S b/libc/sysdeps/linux/powerpc/crt0.S
index 114ffa093..4538c431d 100644
--- a/libc/sysdeps/linux/powerpc/crt0.S
+++ b/libc/sysdeps/linux/powerpc/crt0.S
@@ -35,7 +35,7 @@
.section ".text"
.globl _start
.type _start,@function
-#if defined L_crt0 || ! defined __UCLIBC_CTOR_DTOR__
+#if defined L_crt0 || L_Scrt0 || ! defined __UCLIBC_CTOR_DTOR__
.type __uClibc_main,%function
#else
.weak _init
@@ -66,16 +66,29 @@ _start:
addi r5,r5,1
rlwinm r5,r5,2,0,29
add r5,r5,r4
-
+#if defined L_Scrt0 || defined L_Scrt1
+ bl _GLOBAL_OFFSET_TABLE_-4@local
+ mflr r31
+#endif
/* Ok, now run uClibc's main() -- shouldn't return */
-#if (defined L_crt1) && defined __UCLIBC_CTOR_DTOR__
+#if (defined L_crt1 || defined L_Scrt1) && defined __UCLIBC_CTOR_DTOR__
+# ifdef L_Scrt1
+ lwz r6,_init@got(r31)
+ lwz r7,_fini@got(r31)
+ bl __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
bl __uClibc_start_main
+# endif
#else
+# ifdef L_Scrt0
+ bl __uClibc_main@plt
+# else
bl __uClibc_main
+# endif
#endif
.size _start,.-_start