Update.

2001-08-31  Richard Henderson  <rth@redhat.com>

	* elf/dl-support.c (_dl_cpuclock_offset): Protect with NONAVAIL.
	(HP_TIMING_AVAIL): Set to HP_SMALL_TIMING_AVAIL if present.
	* elf/rtld.c (HP_TIMING_AVAIL): Likewise.
	(print_statistics): Make scalar unsigned long long.
	* sysdeps/alpha/hp-timing.h: New file.

2001-08-31  Jakub Jelinek  <jakub@redhat.com>

	* stdio-common/perror.c (perror): Save errno early, pass it
	down to perror_internal.
	(perror_internal): Add errnum argument.

2001-08-31  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/alpha/dl-machine.h (elf_machine_rela): Remove unused code.
	Don't add old memory content for R_ALPHA_REFQUAD.

ChangeLog

@@ -1,3 +1,22 @@
+2001-08-31  Richard Henderson  <rth@redhat.com>
+
+	* elf/dl-support.c (_dl_cpuclock_offset): Protect with NONAVAIL.
+	(HP_TIMING_AVAIL): Set to HP_SMALL_TIMING_AVAIL if present.
+	* elf/rtld.c (HP_TIMING_AVAIL): Likewise.
+	(print_statistics): Make scalar unsigned long long.
+	* sysdeps/alpha/hp-timing.h: New file.
+
+2001-08-31  Jakub Jelinek  <jakub@redhat.com>
+
+	* stdio-common/perror.c (perror): Save errno early, pass it
+	down to perror_internal.
+	(perror_internal): Add errnum argument.
+
+2001-08-31  Jakub Jelinek  <jakub@redhat.com>
+
+	* sysdeps/alpha/dl-machine.h (elf_machine_rela): Remove unused code.
+	Don't add old memory content for R_ALPHA_REFQUAD.
+
 2001-08-30  Ulrich Drepper  <drepper@redhat.com>
 
 	* crypt/md5-crypt.c (__md5_crypt_r): Compute used and required

elf/dl-support.c

@@ -93,8 +93,14 @@ struct r_scope_elem *_dl_main_searchlist = &_dl_initial_searchlist;
 /* Nonzero during startup.  */
 int _dl_starting_up = 1;
 
+/* We expect less than a second for relocation.  */
+#ifdef HP_SMALL_TIMING_AVAIL
+# undef HP_TIMING_AVAIL
+# define HP_TIMING_AVAIL HP_SMALL_TIMING_AVAIL
+#endif
+
 /* Initial value of the CPU clock.  */
-#if HP_TIMING_AVAIL
+#ifndef HP_TIMING_NONAVAIL
 hp_timing_t _dl_cpuclock_offset;
 #endif
 
@@ -133,9 +139,8 @@ static void non_dynamic_init (void) __attribute__ ((unused));
 static void
 non_dynamic_init (void)
 {
-#if HP_TIMING_AVAIL
+  if (HP_TIMING_AVAIL)
     HP_TIMING_NOW (_dl_cpuclock_offset);
-#endif
 
   if (!_dl_pagesize)
     _dl_pagesize = __getpagesize ();

elf/rtld.c

@@ -121,6 +121,12 @@ struct link_map _dl_rtld_map;
 struct libname_list _dl_rtld_libname;
 struct libname_list _dl_rtld_libname2;
 
+/* We expect less than a second for relocation.  */
+#ifdef HP_SMALL_TIMING_AVAIL
+# undef HP_TIMING_AVAIL
+# define HP_TIMING_AVAIL HP_SMALL_TIMING_AVAIL
+#endif
+
 /* Variable for statistics.  */
 #ifndef HP_TIMING_NONAVAIL
 static hp_timing_t rtld_total_time;
@@ -128,7 +134,7 @@ static hp_timing_t relocate_time;
 static hp_timing_t load_time;
 #endif
 extern unsigned long int _dl_num_relocations;		/* in dl-lookup.c */
-extern unsigned long int _dl_num_cache_relocations;	/* in dl-lookup.c */
+extern unsigned long int _dl_num_cache_relocations;	/* in dl-reloc.c */
 
 static ElfW(Addr) _dl_start_final (void *arg, struct link_map *bootstrap_map_p,
 				   hp_timing_t start_time);
@@ -1506,7 +1512,7 @@ print_statistics (void)
     {
       char pbuf[30];
       HP_TIMING_PRINT (buf, sizeof (buf), relocate_time);
-      cp = _itoa_word ((1000 * relocate_time) / rtld_total_time,
+      cp = _itoa_word ((1000ULL * relocate_time) / rtld_total_time,
 		       pbuf + sizeof (pbuf), 10, 0);
       wp = pbuf;
       switch (pbuf + sizeof (pbuf) - cp)
@@ -1535,7 +1541,7 @@ print_statistics (void)
     {
       char pbuf[30];
       HP_TIMING_PRINT (buf, sizeof (buf), load_time);
-      cp = _itoa_word ((1000 * load_time) / rtld_total_time,
+      cp = _itoa_word ((1000ULL * load_time) / rtld_total_time,
 		       pbuf + sizeof (pbuf), 10, 0);
       wp = pbuf;
       switch (pbuf + sizeof (pbuf) - cp)

stdio-common/perror.c

@@ -26,10 +26,9 @@
 #endif
 
 static void
-perror_internal (FILE *fp, const char *s)
+perror_internal (FILE *fp, const char *s, int errnum)
 {
   char buf[1024];
-  int errnum = errno;
   const char *colon;
   const char *errstring;
 
@@ -55,6 +54,7 @@ perror_internal (FILE *fp, const char *s)
 void
 perror (const char *s)
 {
+  int errnum = errno;
 #ifdef USE_IN_LIBIO
   FILE *fp;
   int fd = -1;
@@ -73,20 +73,20 @@ perror (const char *s)
 	__close (fd);
 
       /* Use standard error as is.  */
-      perror_internal (stderr, s);
+      perror_internal (stderr, s, errnum);
     }
   else
     {
       /* We don't have to do any special hacks regarding the file
 	 position.  Since the stderr stream wasn't used so far we just
 	 write to the descriptor.  */
-      perror_internal (fp, s);
+      perror_internal (fp, s, errnum);
       /* Close the stream.  */
       fclose (fp);
 
       ((_IO_FILE *) stderr)->_offset = _IO_pos_BAD;
     }
 #else
-  perror_internal (stderr, s);
+  perror_internal (stderr, s, errnum);
 #endif
 }

sysdeps/alpha/dl-machine.h

@@ -522,24 +522,7 @@ elf_machine_rela (struct link_map *map,
       else if (r_type == R_ALPHA_REFQUAD)
 	{
 	  void *reloc_addr_1 = reloc_addr;
-	  Elf64_Addr reloc_addr_val;
 
-	  /* Load value without causing unaligned trap.  */
-	  memcpy (&reloc_addr_val, reloc_addr_1, 8);
-	  sym_value += reloc_addr_val;
-	  if (map == &_dl_rtld_map)
-	    {
-	      /* Undo the relocation done here during bootstrapping.
-		 Now we will relocate anew, possibly using a binding
-		 found in the user program or a loaded library rather
-		 than the dynamic linker's built-in definitions used
-		 while loading those libraries.  */
-	      const Elf64_Sym *const dlsymtab
-		= (void *) D_PTR (map, l_info[DT_SYMTAB]);
-	      sym_value -= map->l_addr;
-	      sym_value -= dlsymtab[ELF64_R_SYM(reloc->r_info)].st_value;
-	      sym_value -= reloc->r_addend;
-	    }
 	  /* Store value without causing unaligned trap.  */
 	  memcpy (reloc_addr_1, &sym_value, 8);
 	}

sysdeps/alpha/hp-timing.h

@@ -0,0 +1,118 @@
+/* High precision, low overhead timing functions.  Alpha version.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson <rth@redhat.com>, 2001.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _HP_TIMING_H
+#define _HP_TIMING_H	1
+
+#include <string.h>
+#include <sys/param.h>
+#include <stdio-common/_itoa.h>
+
+/* The macros defined here use the timestamp counter in IA-64.  They
+   provide a very accurate way to measure the time with very little
+   overhead.  The time values themself have no real meaning, only
+   differences are interesting.
+
+   The list of macros we need includes the following:
+
+   - HP_TIMING_AVAIL: test for availability.
+
+   - HP_TIMING_INLINE: this macro is non-zero if the functionality is not
+     implemented using function calls but instead uses some inlined code
+     which might simply consist of a few assembler instructions.  We have to
+     know this since we might want to use the macros here in places where we
+     cannot make function calls.
+
+   - hp_timing_t: This is the type for variables used to store the time
+     values.
+
+   - HP_TIMING_ZERO: clear `hp_timing_t' object.
+
+   - HP_TIMING_NOW: place timestamp for current time in variable given as
+     parameter.
+
+   - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the
+     HP_TIMING_DIFF macro.
+
+   - HP_TIMING_DIFF: compute difference between two times and store it
+     in a third.  Source and destination might overlap.
+
+   - HP_TIMING_ACCUM: add time difference to another variable.  This might
+     be a bit more complicated to implement for some platforms as the
+     operation should be thread-safe and 64bit arithmetic on 32bit platforms
+     is not.
+
+   - HP_TIMING_ACCUM_NT: this is the variant for situations where we know
+     there are no threads involved.
+
+   - HP_TIMING_PRINT: write decimal representation of the timing value into
+     the given string.  This operation need not be inline even though
+     HP_TIMING_INLINE is specified.
+*/
+
+/* We always have the timestamp register, but it's got only a 4 second
+   range.  Use it for ld.so profiling only.  */
+#define HP_TIMING_AVAIL		(0)
+#define HP_SMALL_TIMING_AVAIL	(1)
+
+/* We indeed have inlined functions.  */
+#define HP_TIMING_INLINE	(1)
+
+/* We use 32 bit values for the times.  */
+typedef unsigned int hp_timing_t;
+
+/* Set timestamp value to zero.  */
+#define HP_TIMING_ZERO(VAR)	(VAR) = (0)
+
+/* The "rpcc" instruction returns a 32-bit counting half and a 32-bit
+   "virtual cycle counter displacement".  Subtracting the two gives us
+   a virtual cycle count.  */
+#define HP_TIMING_NOW(VAR) \
+  do {									      \
+    unsigned long int x_;						      \
+    asm volatile ("rpcc %0" : "=r"(x_));				      \
+    (VAR) = (int) (x_) - (int) (x_ >> 32);				      \
+  } while (0)
+
+/* ??? Two rpcc instructions can be scheduled simultaneously.  */
+#define HP_TIMING_DIFF_INIT() do { } while (0)
+
+/* It's simple arithmetic for us.  */
+#define HP_TIMING_DIFF(Diff, Start, End)	(Diff) = ((End) - (Start))
+
+/* ??? Don't bother, since we're only used for ld.so.  */
+#define HP_TIMING_ACCUM(Sum, Diff)  not implemented
+
+/* No threads, no extra work.  */
+#define HP_TIMING_ACCUM_NT(Sum, Diff)	(Sum) += (Diff)
+
+/* Print the time value.  */
+#define HP_TIMING_PRINT(Buf, Len, Val) \
+  do {									      \
+    char __buf[20];							      \
+    char *__cp = _itoa_word (Val, __buf + sizeof (__buf), 10, 0);	      \
+    int __len = (Len);							      \
+    char *__dest = (Buf);						      \
+    while (__len-- > 0 && __cp < __buf + sizeof (__buf))		      \
+      *__dest++ = *__cp++;						      \
+    memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles")));  \
+  } while (0)
+
+#endif	/* hp-timing.h */