* sysdeps/unix/sysv/linux/i386/sysdep.h (SYSCALL_ERROR_HANDLER):

	New macro.
	(PSEUDO): Use it instead of SYSCALL_PIC_SETUP and jmp syscall_error.

	* sysdeps/unix/sysv/linux/i386/sysdep.S (__syscall_error): Define
	only #ifndef PIC.

	* Makeconfig (built-program-cmd): New variable.
	* sunrpc/Makefile (rpcgen-cmd): Use $(built-program-cmd).
	* time/Makefile (zic-cmd): Likewise.

	* hurd/Makefile (user-interfaces): Add hurd/exec_startup.

10 files changed, 99 insertions, 32 deletions

diff --git a/ChangeLog b/ChangeLog
index 8780e6f9f7..7fbf4668f0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,18 @@
 Tue Oct 24 15:22:58 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>
 
+	* sysdeps/unix/sysv/linux/i386/sysdep.h (SYSCALL_ERROR_HANDLER):
+	New macro.
+	(PSEUDO): Use it instead of SYSCALL_PIC_SETUP and jmp syscall_error.
+
+	* sysdeps/unix/sysv/linux/i386/sysdep.S (__syscall_error): Define
+	only #ifndef PIC.
+
+	* Makeconfig (built-program-cmd): New variable.
+	* sunrpc/Makefile (rpcgen-cmd): Use $(built-program-cmd).
+	* time/Makefile (zic-cmd): Likewise.
+
+	* hurd/Makefile (user-interfaces): Add hurd/exec_startup.
+
 	* sunrpc/Makefile (librpcsvc-no-lib-dep): New variable.
 	* extra-lib.mk: If $(lib)-no-lib-dep is defined and MAKELEVEL>0,
 	make `others' rather than `lib-noranlib' depend on the libraries.
diff --git a/Makeconfig b/Makeconfig
index cbb2db0102..47c48d4615 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -301,8 +301,10 @@ ifeq ($(elf),yes)
 endif
 ifdef objpfx
 csu-objpfx = $(objpfx)
+elf-objpfx = $(objpfx)
 else
 csu-objpfx = $(..)csu/
+elf-objpfx = $(..)elf/
 endif
 
 ifeq (yes,$(build-shared))
@@ -311,6 +313,21 @@ rtld-installed-name = ld.so
 endif
 endif
 
+# How to run a program we just linked with our library.
+# The program binary is assumed to be $(word 2,$^).
+built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
+ifneq (yes,$(build-shared))
+built-program-cmd = $(built-program-file)
+else
+, = ,
+define built-program-cmd
+LD_LIBRARY_PATH=$(common-objdir)$(patsubst -Wl$,-rpath-link=%,:%,\
+					   $(filter -Wl$,-rpath-link=%,\
+						    $(sysdep-LDFLAGS))) \
+$(elf-objpfx)ld.so $(built-program-file)
+endef
+endif
+
 ifndef LD
 LD := ld -X
 endif
diff --git a/hurd/Makefile b/hurd/Makefile
index 53b73487f8..8d1f19464b 100644
--- a/hurd/Makefile
+++ b/hurd/Makefile
@@ -35,7 +35,7 @@ interface-library := libhurduser
 user-interfaces		:= $(addprefix hurd/,\
 				       auth process startup \
 				       msg msg_reply msg_request \
-				       exec crash interrupt \
+				       exec exec_startup crash interrupt \
 				       fs fsys io term socket ifsock)
 server-interfaces	:= hurd/msg
 
diff --git a/posix/regex.c b/posix/regex.c
index 0fd1833cc7..13c70faa4c 100644
--- a/posix/regex.c
+++ b/posix/regex.c
@@ -241,9 +241,11 @@ init_syntax_once ()
 #if HAVE_ALLOCA_H
 #include <alloca.h>
 #else /* not __GNUC__ or HAVE_ALLOCA_H */
+#if 0 /* It is a bad idea to declare alloca.  We always cast the result.  */
 #ifndef _AIX /* Already did AIX, up at the top.  */
 char *alloca ();
 #endif /* not _AIX */
+#endif
 #endif /* not HAVE_ALLOCA_H */ 
 #endif /* not __GNUC__ */
 
@@ -1379,11 +1381,13 @@ static reg_errcode_t compile_range ();
    if necessary.  Also cast from a signed character in the constant
    string passed to us by the user to an unsigned char that we can use
    as an array index (in, e.g., `translate').  */
+#ifndef PATFETCH
 #define PATFETCH(c)							\
   do {if (p == pend) return REG_EEND;					\
     c = (unsigned char) *p++;						\
-    if (translate) c = translate[c]; 					\
+    if (translate) c = (unsigned char) translate[c];			\
   } while (0)
+#endif
 
 /* Fetch the next character in the uncompiled pattern, with no
    translation.  */
@@ -1400,7 +1404,10 @@ static reg_errcode_t compile_range ();
    cast the subscript to translate because some data is declared as
    `char *', to avoid warnings when a string constant is passed.  But
    when we use a character as a subscript we must make it unsigned.  */
-#define TRANSLATE(d) (translate ? translate[(unsigned char) (d)] : (d))
+#ifndef TRANSLATE
+#define TRANSLATE(d) \
+  (translate ? (char) translate[(unsigned char) (d)] : (d))
+#endif
 
 
 /* Macros for outputting the compiled pattern into `buffer'.  */
@@ -1666,7 +1673,7 @@ regex_compile (pattern, size, syntax, bufp)
   const char *pend = pattern + size;
   
   /* How to translate the characters in the pattern.  */
-  char *translate = bufp->translate;
+  RE_TRANSLATE_TYPE translate = bufp->translate;
 
   /* Address of the count-byte of the most recently inserted `exactn'
      command.  This makes it possible to tell if a new exact-match
@@ -2832,7 +2839,7 @@ group_in_compile_stack (compile_stack, regnum)
 static reg_errcode_t
 compile_range (p_ptr, pend, translate, syntax, b)
     const char **p_ptr, *pend;
-    char *translate;
+    RE_TRANSLATE_TYPE translate;
     reg_syntax_t syntax;
     unsigned char *b;
 {
@@ -3264,7 +3271,7 @@ re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop)
 {
   int val;
   register char *fastmap = bufp->fastmap;
-  register char *translate = bufp->translate;
+  register RE_TRANSLATE_TYPE translate = bufp->translate;
   int total_size = size1 + size2;
   int endpos = startpos + range;
 
@@ -3552,7 +3559,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
   unsigned char *just_past_start_mem = 0;
 
   /* We use this to map every character in the string.  */
-  char *translate = bufp->translate;
+  RE_TRANSLATE_TYPE translate = bufp->translate;
 
   /* Failure point stack.  Each place that can handle a failure further
      down the line pushes a failure point on this stack.  It consists of
@@ -3951,7 +3958,8 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 	      do
 		{
 		  PREFETCH ();
-		  if (translate[(unsigned char) *d++] != (char) *p++)
+		  if ((unsigned char) translate[(unsigned char) *d++]
+		      != (unsigned char) *p++)
                     goto fail;
 		}
 	      while (--mcnt);
@@ -5073,7 +5081,7 @@ static int
 bcmp_translate (s1, s2, len, translate)
      unsigned char *s1, *s2;
      register int len;
-     char *translate;
+     RE_TRANSLATE_TYPE translate;
 {
   register unsigned char *p1 = s1, *p2 = s2;
   while (len)
@@ -5245,7 +5253,9 @@ regcomp (preg, pattern, cflags)
     {
       unsigned i;
       
-      preg->translate = (char *) malloc (CHAR_SET_SIZE);
+      preg->translate
+	= (RE_TRANSLATE_TYPE) malloc (CHAR_SET_SIZE
+				      * sizeof (*(RE_TRANSLATE_TYPE)0));
       if (preg->translate == NULL)
         return (int) REG_ESPACE;
 
diff --git a/posix/regex.h b/posix/regex.h
index 42afd84881..21dcf09005 100644
--- a/posix/regex.h
+++ b/posix/regex.h
@@ -283,6 +283,10 @@ typedef enum
    compiled, the `re_nsub' field is available.  All other fields are
    private to the regex routines.  */
 
+#ifndef RE_TRANSLATE_TYPE 
+#define RE_TRANSLATE_TYPE char *
+#endif
+
 struct re_pattern_buffer
 {
 /* [[[begin pattern_buffer]]] */
@@ -309,7 +313,7 @@ struct re_pattern_buffer
            comparing them, or zero for no translation.  The translation
            is applied to a pattern when it is compiled and to a string
            when it is matched.  */
-  char *translate;
+  RE_TRANSLATE_TYPE translate;
 
 	/* Number of subexpressions found by the compiler.  */
   size_t re_nsub;
diff --git a/sunrpc/Makefile b/sunrpc/Makefile
index 073c19e10a..27c85cfe4c 100644
--- a/sunrpc/Makefile
+++ b/sunrpc/Makefile
@@ -87,7 +87,7 @@ include ../Rules
 $(objpfx)rpcgen: $(addprefix $(objpfx),$(rpcgen-objs)) $(common-objpfx)libc.a
 	$(+link)
 
-rpcgen-cmd = $(dir $(word 2,$^))$(notdir $(word 2,$^))
+rpcgen-cmd = $(built-program-cmd)
 
 # The proper file name is longer than 14 chars, so we install it under
 # a shorter name.  But if the filesystem can handle it, we want to
diff --git a/sysdeps/unix/configure b/sysdeps/unix/configure
index dfc1c22960..249a12907a 100755
--- a/sysdeps/unix/configure
+++ b/sysdeps/unix/configure
@@ -65,6 +65,7 @@ for unix_function in \
   getitimer setitimer \
   getdomainname/getdomain=bsd/bsd4.4 \
   setdomainname/setdomain=bsd/bsd4.4 \
+  fchdir=bsd/bsd4.4 \
   profil=bsd readv=bsd writev=bsd \
   getpriority setpriority \
   getrlimit setrlimit
@@ -76,8 +77,8 @@ do
   unix_srcname=
   unix_srcdir=common
   eval "unix_syscall=`echo $unix_function | \
-		       sed -e 's@=\(.*\)$@ unix_srcdir=\1@' \
-			   -e 's@/\(.*\)$@ unix_srcname=\1@'`"
+		      sed -e 's@=\(.*\)$@ unix_srcdir=\1@' \
+			  -e 's@/\(^=/*\)$@ unix_srcname=\1@'`"
   test -z "$unix_srcname" && unix_srcname=$unix_syscall
 
   unix_implementor=none
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.S b/sysdeps/unix/sysv/linux/i386/sysdep.S
index 5bbe3b745d..f5ac8aa017 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.S
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.S
@@ -16,17 +16,6 @@ License along with the GNU C Library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
-/* The syscall stubs jump here when they detect an error.
-   The code for Linux is almost identical to the canonical Unix/i386
-   code, except that the error number in %eax is negated.  */
-
-.globl __syscall_error
-__syscall_error:
-	negl %eax
-
-#define __syscall_error __syscall_error_1
-#include <sysdeps/unix/i386/sysdep.S>
-
 /* Because the Linux version is in fact i386/ELF and the start.? file
    for this system (sysdeps/i386/elf/start.S) is also used by The Hurd
    and therefore this files must not contain the definition of the
@@ -38,3 +27,21 @@ __syscall_error:
 	.globl errno
 errno:
 	.long 0
+
+/* The following code is not used at all in the shared library.
+   The PIC system call stubs set errno themselves.  */
+
+#ifndef	PIC
+
+/* The syscall stubs jump here when they detect an error.
+   The code for Linux is almost identical to the canonical Unix/i386
+   code, except that the error number in %eax is negated.  */
+
+.globl __syscall_error
+__syscall_error:
+	negl %eax
+
+#define __syscall_error __syscall_error_1
+#include <sysdeps/unix/i386/sysdep.S>
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index ccb484664f..7bd910e534 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -42,16 +42,31 @@ Cambridge, MA 02139, USA.  */
 #undef	PSEUDO
 #define	PSEUDO(name, syscall_name, args)				      \
   .text;								      \
- lose: SYSCALL_PIC_SETUP						      \
-    jmp JUMPTARGET (syscall_error)					      \
-  .globl syscall_error;							      \
+  SYSCALL_ERROR_HANDLER							      \
   ENTRY (name)								      \
     movl $SYS_ify (syscall_name), %eax;					      \
     DO_CALL (args);							      \
     testl %eax, %eax;							      \
-    jl lose
+    jl syscall_error;
 
-/* We define our own ENTRY macro because the alignment should be 16 for ELF.  */
+#ifndef	PIC
+#define SYSCALL_ERROR_HANDLER	/* Nothing here; code in sysdep.S is used.  */
+#else
+/* Store (- %eax) into errno through the GOT.  */
+#define SYSCALL_ERROR_HANDLER						      \
+syscall_error:								      \
+  call 0f;								      \
+0:popl %ecx;								      \
+  negl %eax;								      \
+  addl $_GLOBAL_OFFSET_TABLE_+[.-0b], %ecx;				      \
+  movl errno@GOT(%ecx), %ecx;						      \
+  movl %eax, (%ecx);							      \
+  movl $-1, %eax;							      \
+  ret
+#endif
+
+/* We define our own ENTRY macro because the alignment should be 16 for
+   ELF.  */
 #undef ENTRY
 #define ENTRY(name)							      \
   ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (name);				      \
@@ -81,7 +96,7 @@ Cambridge, MA 02139, USA.  */
    arguments 4 and 5.)
 
    The following code tries hard to be optimal.  A general assuption
-   (which is true accoriding to the data books I have) is that
+   (which is true according to the data books I have) is that
 
 	2 * xchg	is more expensive than	pushl + movl + popl
 
diff --git a/time/Makefile b/time/Makefile
index 435ef83998..19af2df8e1 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -98,7 +98,7 @@ echo-zonenames: zonenames
 # Although $(zonedir) gets compiled into zic, it is useful to always
 # specify it with -d on the command line so that it can be overridden on
 # the command line of `make install' (e.g., "make install prefix=/foo").
-zic-cmd = $(dir $(word 2,$^))$(notdir $(word 2,$^)) -d $(zonedir)
+zic-cmd = $(built-program-cmd) -d $(zonedir)
 define tzcompile
 $(zic-cmd) -L $(word 3,$^) -y $(dir $(word 4,$^))$(notdir $(word 4,$^)) $<
 endef