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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.
This commit is contained in:
Ulrich Drepper 2001-09-01 06:10:36 +00:00
parent cb2391e14a
commit eaad82e005
6 changed files with 162 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
ChangeLog
View File

@ -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

13
elf/dl-support.c
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@ -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
HP_TIMING_NOW (_dl_cpuclock_offset);
#endif
if (HP_TIMING_AVAIL)
HP_TIMING_NOW (_dl_cpuclock_offset);
if (!_dl_pagesize)
_dl_pagesize = __getpagesize ();

16
elf/rtld.c
View File

@ -121,14 +121,20 @@ 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;
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_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);
@ -136,7 +142,7 @@ static ElfW(Addr) _dl_start_final (void *arg, struct link_map *bootstrap_map_p,
#ifdef RTLD_START
RTLD_START
#else
#error "sysdeps/MACHINE/dl-machine.h fails to define RTLD_START"
# error "sysdeps/MACHINE/dl-machine.h fails to define RTLD_START"
#endif
static ElfW(Addr)
@ -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)

10
stdio-common/perror.c
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@ -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
}

17
sysdeps/alpha/dl-machine.h
View File

@ -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);
}

118
sysdeps/alpha/hp-timing.h Normal file
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@ -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 */