* Makerules: Define build-module-asneeded.

	* iconvdata/extra-module.mk: Use build-module-asneeded.
	needed.

2006-01-09  Richard Henderson  <rth@redhat.com>

	* iconvdata/extra-module.mk ($(objpfx)$(mod).so): Depend on ld.so.
	* sysdeps/alpha/__longjmp.S: Use PTR_DEMANGLE.
	* sysdeps/alpha/setjmp.S: Likewise.  Avoid __sigjmp_save for rtld;
	tailcall in libc.so.
	* sysdeps/unix/sysv/linux/alpha/sysdep.h (PTR_MANGLE): Define.
	(PTR_MANGLE2): Define.

2006-01-11  Ulrich Drepper  <drepper@redhat.com>

ChangeLog

@@ -1,3 +1,18 @@
+2006-01-11  Ulrich Drepper  <drepper@redhat.com>
+
+	* Makerules: Define build-module-asneeded.
+	* iconvdata/extra-module.mk: Use build-module-asneeded.
+	needed.
+
+2006-01-09  Richard Henderson  <rth@redhat.com>
+
+	* iconvdata/extra-module.mk ($(objpfx)$(mod).so): Depend on ld.so.
+	* sysdeps/alpha/__longjmp.S: Use PTR_DEMANGLE.
+	* sysdeps/alpha/setjmp.S: Likewise.  Avoid __sigjmp_save for rtld;
+	tailcall in libc.so.
+	* sysdeps/unix/sysv/linux/alpha/sysdep.h (PTR_MANGLE): Define.
+	(PTR_MANGLE2): Define.
+
 2006-01-11  Ulrich Drepper  <drepper@redhat.com>
 
 	* elf/check-localplt.c: New file.

Makerules

@@ -572,6 +572,11 @@ define build-module
 $(build-module-helper) -o $@ -T $(common-objpfx)shlib.lds \
 	  $(csu-objpfx)abi-note.o $(build-module-objlist)
 endef
+define build-module-asneeded
+$(build-module-helper) -o $@ -T $(common-objpfx)shlib.lds \
+	  $(csu-objpfx)abi-note.o \
+	  -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed
+endef
 else
 ifneq (,$(findstring aix,$(config-os)))
 define build-module

elf/Makefile

@@ -828,11 +828,21 @@ check-data := $(firstword $(wildcard \
 ifneq (,$(check-data))
 tests: $(objpfx)check-localplt.out
 
+ifeq ($(have-thread-library),yes)
+thread-dso := $(filter-out %_nonshared.a, $(shared-thread-library))
+endif
+
 $(objpfx)check-localplt.out: $(objpfx)check-localplt $(common-objpfx)libc.so \
-			     $(common-objpfx)math/libm.so $(check-data)
+			     $(common-objpfx)math/libm.so $(thread-dso) \
+			     $(common-objpfx)rt/librt.so \
+			     $(common-objpfx)dlfcn/libdl.so \
+			     $(check-data)
 	$(objpfx)check-localplt $(common-objpfx)libc.so \
-				$(common-objpfx)math/libm.so | LC_ALL=C sort |\
-	  diff -u $(check-data) -
+				$(common-objpfx)math/libm.so $(thread-dso) \
+				$(common-objpfx)rt/librt.so \
+				$(common-objpfx)dlfcn/libdl.so | \
+	  LC_ALL=C sort | \
+	  diff -u $(check-data) - > $@
 endif
 endif
 

elf/check-localplt.c

@@ -212,7 +212,7 @@ AB(handle_file) (const char *fname, int fd)
 
 	if (sym.st_value != 0)
 	  /* This symbol is locally defined.  */
-	  puts (strtab + SWAP (sym.st_name));
+	  printf ("%s: %s\n", basename (fname), strtab + SWAP (sym.st_name));
       }
   else
     for (E(Rel) *rel = relmem; (char *) rel - (char *) relmem < relsz; ++rel)
@@ -230,7 +230,7 @@ AB(handle_file) (const char *fname, int fd)
 
 	if (sym.st_value != 0)
 	  /* This symbol is locally defined.  */
-	  puts (strtab + SWAP (sym.st_name));
+	  printf ("%s: %s\n", basename (fname), strtab + SWAP (sym.st_name));
       }
 
   return 0;

iconvdata/extra-module.mk

@@ -5,12 +5,14 @@ extra-objs := $(extra-objs) $(patsubst %,%.os,$($(mod)-routines))
 
 $(objpfx)$(mod).so: $(addprefix $(objpfx),$(addsuffix .os,$($(mod)-routines)))\
 		    $(common-objpfx)shlib.lds
-	$(build-module)
+	$(build-module-asneeded)
 
 # Depend on libc.so so a DT_NEEDED is generated in the shared objects.
 # This ensures they will load libc.so for needed symbols if loaded by
 # a statically-linked program that hasn't already loaded it.
-$(objpfx)$(mod).so: $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a
+$(objpfx)$(mod).so: $(common-objpfx)libc.so \
+	$(common-objpfx)/elf/ld.so \
+	$(common-objpfx)libc_nonshared.a
 
 ifneq (,$(extra-modules-left))
 include extra-module.mk

scripts/data/localplt-i386-linux-gnu.data

@@ -1,7 +1,7 @@
-_Unwind_Find_FDE
-calloc
-free
-malloc
-matherr
-memalign
-realloc
+libc.so: _Unwind_Find_FDE
+libc.so: calloc
+libc.so: free
+libc.so: malloc
+libc.so: memalign
+libc.so: realloc
+libm.so: matherr

scripts/data/localplt-x86_64-linux-gnu.data

@@ -1,6 +1,6 @@
-calloc
-free
-malloc
-matherr
-memalign
-realloc
+libc.so: calloc
+libc.so: free
+libc.so: malloc
+libc.so: memalign
+libc.so: realloc
+libm.so: matherr

sysdeps/alpha/__longjmp.S

@@ -54,6 +54,11 @@ ENTRY(__longjmp)
 	ldt     $f7, JB_F7*8(a0)
 	ldt     $f8, JB_F8*8(a0)
 	ldt     $f9, JB_F9*8(a0)
+#ifdef PTR_DEMANGLE
+	PTR_DEMANGLE(ra, t1)
+	PTR_DEMANGLE2(t0, t1)
+	PTR_DEMANGLE2(fp, t1)
+#endif
 	cmoveq  v0, 1, v0
 	mov     t0, sp
 	ret

sysdeps/alpha/setjmp.S

@@ -23,16 +23,22 @@
 #define _SETJMP_H
 #include <bits/setjmp.h>
 
-       .ent __sigsetjmp
-       .global __sigsetjmp
+	.ent __sigsetjmp
+	.global __sigsetjmp
 __sigsetjmp:
-       ldgp    gp, 0(pv)
+	ldgp    gp, 0(pv)
 
 $sigsetjmp_local:
-       subq    sp, 16, sp
-       .frame  sp, 16, ra, 0
-       stq     ra, 0(sp)
-       .mask   0x04000000, -16
+#ifndef PIC
+#define FRAME	16	
+	subq    sp, FRAME, sp
+	.frame  sp, FRAME, ra, 0
+	stq     ra, 0(sp)
+	.mask   0x04000000, -FRAME
+#else
+#define FRAME	0
+	.frame	sp, FRAME, ra, 0
+#endif
 #ifdef PROF
 	.set noat
 	lda	AT, _mcount
@@ -47,10 +53,27 @@ $sigsetjmp_local:
 	stq	s3, JB_S3*8(a0)
 	stq	s4, JB_S4*8(a0)
 	stq	s5, JB_S5*8(a0)
+#ifdef PTR_MANGLE
+	PTR_MANGLE(t1, ra, t0)
+	stq	t1, JB_PC*8(a0)
+#else
 	stq	ra, JB_PC*8(a0)
-	addq	sp, 16, t0
+#endif
+#if defined(PTR_MANGLE) && FRAME == 0
+	PTR_MANGLE2(t1, sp, t0)
+#else
+	addq	sp, FRAME, t1
+# ifdef PTR_MANGLE
+	PTR_MANGLE2(t1, t1, t0)
+# endif
+#endif
+	stq	t1, JB_SP*8(a0)
+#ifdef PTR_MANGLE
+	PTR_MANGLE2(t1, fp, t0)
+	stq	t1, JB_FP*8(a0)
+#else
 	stq	fp, JB_FP*8(a0)
-	stq	t0, JB_SP*8(a0)
+#endif
 	stt	$f2, JB_F2*8(a0)
 	stt	$f3, JB_F3*8(a0)
 	stt	$f4, JB_F4*8(a0)
@@ -60,12 +83,20 @@ $sigsetjmp_local:
 	stt	$f8, JB_F8*8(a0)
 	stt	$f9, JB_F9*8(a0)
 
+#ifndef PIC
 	/* Call to C to (potentially) save our signal mask.  */
 	jsr	ra, __sigjmp_save
-
 	ldq	ra, 0(sp)
 	addq	sp, 16, sp
 	ret
+#elif defined NOT_IN_libc && defined IS_IN_rtld
+	/* In ld.so we never save the signal mask.  */
+	mov	0, v0
+	ret
+#else
+	/* Tailcall to save the signal mask.  */
+	br	$31, __sigjmp_save	!samegp
+#endif
 
 END(__sigsetjmp)
 

sysdeps/unix/sysv/linux/alpha/sysdep.h

@@ -22,10 +22,10 @@
 #define _LINUX_ALPHA_SYSDEP_H 1
 
 #ifdef __ASSEMBLER__
-
 #include <asm/pal.h>
 #include <alpha/regdef.h>
-
+#else
+#include <stdint.h>
 #endif
 
 /* There is some commonality.  */
@@ -98,4 +98,39 @@
 	INTERNAL_SYSCALL1(name, err_out, nr, args);			\
 })
 
+/* Pointer mangling support.  Note that tls access is slow enough that
+   we don't deoptimize things by placing the pointer check value there.  */
+#if defined NOT_IN_libc && defined IS_IN_rtld
+# ifdef __ASSEMBLER__
+#  define PTR_MANGLE(dst, src, tmp)				\
+	ldah	tmp, __pointer_chk_guard_local($29) !gprelhigh;	\
+	ldq	tmp, __pointer_chk_guard_local(tmp) !gprellow;	\
+	xor	src, tmp, dst
+#  define PTR_MANGLE2(dst, src, tmp)				\
+	xor	src, tmp, dst
+#  define PTR_DEMANGLE(dst, tmp)   PTR_MANGLE(dst, dst, tmp)
+#  define PTR_DEMANGLE2(dst, tmp)  PTR_MANGLE2(dst, dst, tmp)
+# else
+extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
+#  define PTR_MANGLE(var)	\
+	(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
+#  define PTR_DEMANGLE(var)  PTR_MANGLE(var)
+# endif
+#elif defined PIC
+# ifdef __ASSEMBLER__
+#  define PTR_MANGLE(dst, src, tmp)		\
+	ldq	tmp, __pointer_chk_guard;	\
+	xor	src, tmp, dst
+#  define PTR_MANGLE2(dst, src, tmp)		\
+	xor	src, tmp, dst
+#  define PTR_DEMANGLE(dst, tmp)   PTR_MANGLE(dst, dst, tmp)
+#  define PTR_DEMANGLE2(dst, tmp)  PTR_MANGLE2(dst, dst, tmp)
+# else
+extern uintptr_t __pointer_chk_guard attribute_relro;
+#  define PTR_MANGLE(var)	\
+	(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard)
+#  define PTR_DEMANGLE(var)  PTR_MANGLE(var)
+# endif
+#endif
+
 #endif /* _LINUX_ALPHA_SYSDEP_H */