From 13ca772ddcc86d5a92ee8277d712ed108c1ba606 Mon Sep 17 00:00:00 2001
From: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Date: Thu, 14 Oct 2004 10:08:03 +0000
Subject: Peter Mazinger writes: The attached patch generalizes the use of PIE
 (all archs are brought in sync that use/mention it: x86/ppc/frv) and makes
 use of it building the target utils.

Tested on x86, ppc should be tested, frv uses -fPIE at one location, but
at another place -fpie, I don't know which is correct (could be both) and
misses the target addition in Config.in.

The test for ppc (requires the earlier sent crt-correction patch to work
correctly):
enable UCLIBC_PIE_SUPPORT, build uClibc and utils, check:
file ./utils/ldd, it should show shared object (instead of executable)
---
 libc/sysdeps/linux/frv/Makefile     |  6 ++++--
 libc/sysdeps/linux/i386/Makefile    | 10 +++++++---
 libc/sysdeps/linux/powerpc/Makefile | 10 +++++++---
 3 files changed, 18 insertions(+), 8 deletions(-)

(limited to 'libc/sysdeps/linux')

diff --git a/libc/sysdeps/linux/frv/Makefile b/libc/sysdeps/linux/frv/Makefile
index 0c6978c5a..858b15383 100644
--- a/libc/sysdeps/linux/frv/Makefile
+++ b/libc/sysdeps/linux/frv/Makefile
@@ -23,7 +23,9 @@ ASFLAGS=$(CFLAGS)
 
 CRT0_SRC = crt0.S
 CRT0_OBJ = crt0.o crt1.o
+ifeq $(strip $(UCLIBC_PIE_SUPPORT)),y)
 SCRT0_OBJ = $(patsubst %,S%, $(CRT0_OBJ))
+endif
 CRT0_DEPS=gmon-start.S
 
 CTOR_TARGETS = crti.o crtn.o
@@ -54,11 +56,11 @@ crtreloc.o: crtreloc.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
 $(SCRT0_OBJ): $(CRT0_SRC) Scrtreloc.o
-	$(CC) $(CFLAGS) -fPIE -DL_$* -r -nostdlib $< Scrtreloc.o -o $*.o
+	$(CC) $(CFLAGS) $(PIEFLAG) -DL_$* -r -nostdlib $< Scrtreloc.o -o $*.o
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
 Scrtreloc.o: crtreloc.c
-	$(CC) $(CFLAGS) -fPIE -c $< -o $@
+	$(CC) $(CFLAGS) $(PIEFLAG) -c $< -o $@
 
 $(CTOR_TARGETS): %.o : %.S
 	$(CC) $(CFLAGS) -c $< -o $@
diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile
index 9b2a36290..463dc64ee 100644
--- a/libc/sysdeps/linux/i386/Makefile
+++ b/libc/sysdeps/linux/i386/Makefile
@@ -23,7 +23,7 @@ ASFLAGS=$(CFLAGS)
 CRT0_SRC = crt0.S
 CRT0_OBJ = crt0.o crt1.o
 ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
-CRT0_OBJ += Scrt0.o Scrt1.o
+SCRT0_OBJ = $(patsubst %,S%, $(CRT0_OBJ))
 endif
 CRT0_DEPS=gmon-start.S
 CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
@@ -41,9 +41,9 @@ all: $(OBJS) $(LIBC)
 
 $(LIBC): ar-target 
 
-ar-target: $(OBJS) $(CRT0_OBJ) $(CTOR_TARGETS)
+ar-target: $(OBJS) $(CRT0_OBJ) $(SCRT0_OBJ) $(CTOR_TARGETS)
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
-	cp $(CRT0_OBJ) $(TOPDIR)lib/
+	cp $(CRT0_OBJ) $(SCRT0_OBJ) $(TOPDIR)lib/
 ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
 ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
 	$(RM) $(TOPDIR)lib/Scrt0.o
@@ -56,6 +56,10 @@ $(CRT0_OBJ): $(CRT0_SRC)
 	$(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
+$(SCRT0_OBJ): $(CRT0_SRC)
+	$(CC) $(CFLAGS) $(PIEFLAG) -DL_$* $< -c -o $*.o
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
 $(SOBJS): %.o : %.S
 	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index cf8be499e..de750b460 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -23,7 +23,7 @@ ASFLAGS=$(CFLAGS)
 CRT0_SRC = crt0.S
 CRT0_OBJ = crt0.o crt1.o
 ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
-CRT0_OBJ += Scrt0.o Scrt1.o
+SCRT0_OBJ = $(patsubst %,S%, $(CRT0_OBJ))
 endif
 CRT0_DEPS=gmon-start.S
 CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
@@ -41,9 +41,9 @@ all: $(OBJS) $(LIBC)
 
 $(LIBC): ar-target 
 
-ar-target: $(OBJS) $(CRT0_OBJ) $(CTOR_TARGETS)
+ar-target: $(OBJS) $(CRT0_OBJ) $(SCRT0_OBJ) $(CTOR_TARGETS)
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
-	cp $(CRT0_OBJ) $(TOPDIR)lib/
+	cp $(CRT0_OBJ) $(SCRT0_OBJ) $(TOPDIR)lib/
 ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
 ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
 	$(RM) $(TOPDIR)lib/Scrt0.o
@@ -56,6 +56,10 @@ $(CRT0_OBJ): $(CRT0_SRC)
 	$(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
+$(SCRT0_OBJ): $(CRT0_SRC)
+	$(CC) $(CFLAGS) $(PIEFLAG) -DL_$* $< -c -o $*.o
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
 $(SOBJS): %.o : %.S
 	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
-- 
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