Update.cvs/libc-ud-970926

1997-09-27 01:14  Ulrich Drepper  <drepper@cygnus.com>

	* Makeconfig (extra-objs): Depend in before-compile.

	* configure.in: Locate Perl and substitute with complete path.
	* config.make.in: Add PERL for substitution.
	* elf/Makefile (routines): Add dl-addr.
	* elf/dladdr.c: Move the real code into ...
	* elf/dl-addr.c: New file.
	* elf/link.h: Add prototype for _dl_addr.

	* elf/dladdr.c (dladdr): Change address argument to be const.
	* elf/dlfcn.h: Likewise.

	* locale/C_name.c: Add _nl_POSIX_name.
	* locale/localeinfo.h: Add declaration of _nl_POSIX_name.
	* locale/findlocale.c (_nl_find_locale): Use _nl_POSIX_name.
	(_nl_remove_locale): Free name of data set.
	* locale/setlocale.c (clever_copy): Remove.
	(new_composite_name): Use _nl_C_name and _nl_POSIX_name in compare.
	(setname): Only remove old name when it is for category LC_ALL.

	Change malloc, free, realloc, and memalign hooks for glibc to take
	another parameter indicating the location of the caller.
	* malloc/malloc.c: Change hook functions and variables.
	* malloc/malloc.h: Likewise.
	* malloc/mcheck.c: Likewise.  Make sure later hooked function also
	get the original caller address.
	* malloc/mtrace.c: Likewise.
	(tr_where): If no information in _mtrace_file is given use the
	information about the caller.
	* malloc/Makefile (distribute): Replace mtrace.awk by mtrace.pl.
	Add rules to install mtrace.pl after rewriting.
	* malloc/mtrace.pl: New file.  Based on the old AWK script but
	with extended functionality.
	* malloc/mtrace.awk: Removed.

	* po/fr.po: New version.

	* string/Makefile: Do use builtins for tester.c and inl-tester.c.
	* string/tester.c: Rewrite.  Split in many small functions to not
	exceed gcc's limits.

	* sysdeps/unix/sysv/linux/syscalls.list: Add prctl.

1997-09-25  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* string/bits/string2.h (__stpcpy_small): Don't use casts as
	lvalues.

1997-09-26  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* manual/time.texi (Formatting Date and Time): Clarify
	explanation of strftime flags a bit.
	Suggested by Robert Bihlmeyer <robbe@orcus.priv.at>.

1997-09-25 00:13  David S. Miller  <davem@tanya.rutgers.edu>

	* sysdeps/libm-ieee754/s_exp2f.c: Protect _GNU_SOURCE definition.
	Fix typo, it is FLT_MANT_DIG.

1997-09-24 18:52  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* math/atest-exp2.c: Include <stdlib/gmp.h> instead of <gmp.h>.

1997-08-27 08:10  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* libio/libio.h, libio/libioP.h: Support libio in libstdc++.

	* libio/libio.h (_IO_peekc): Defined as _IO_peekc_unlocked if
	_IO_MTSAFE_IO is undefined.

1997-09-24 23:27  Richard Henderson  <rth@cygnus.com>

	* elf/dl-runtime.c (fixup): Don't go through elf_machine_relplt, but
	lookup the value of the target symbol ourselves and call the new
	elf_machine_fixup_plt.  This kills the ELF_FIXUP_RETURN_VALUE hack.
	(profile_fixup): Likewise, but don't fix up the plt.
	* elf/rtld.c (_dl_main): ELF_MACHINE_RELOC_NOPLT renamed _JMP_SLOT.
	* sysdeps/alpha/dl-machine.h (ELF_MACHINE_RELOC_NOPLT): Renamed.
	(elf_alpha_fix_plt): Renamed elf_machine_fixup_plt.
	* sysdeps/i386/dl-machine.h (elf_machine_relplt): Killed.
	(ELF_MACHINE_JMP_SLOT): Renamed.
	(elf_machine_fixup_plt): New function.
	* sysdeps/m68k/dl-machine.h: Likewise.
	* sysdeps/powerpc/dl-machine.h: Likewise.
	(elf_machine_rela): Moved JMP_SLOT fixup out to elf_machine_fixup_plt.
	* sysdeps/sparc/sparc32/dl-machine.h: Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h: Likewise.
	* sysdeps/stub/dl-machine.h: Update, sorta.

	* sysdeps/alpha/dl-machine.h (elf_machine_runtime_setup): Do profiling.
	(TRAMPOLINE_TEMPLATE): From the carcas of _RUNTIME_TRAMPOLINE, do
	both normal and profile code.
	(elf_machine_rela): Handle r_addend for .got and .plt too.

1 files changed, 85 insertions, 0 deletions

diff --git a/elf/dl-addr.c b/elf/dl-addr.c
new file mode 100644
index 0000000000..d50cc4bf10
--- /dev/null
+++ b/elf/dl-addr.c
@@ -0,0 +1,85 @@
+/* Locate the shared object symbol nearest a given address.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stddef.h>
+#include <link.h>
+#include <dlfcn.h>
+
+
+int
+_dl_addr (const void *address, Dl_info *info)
+{
+  const ElfW(Addr) addr = (ElfW(Addr)) address;
+  struct link_map *l, *match;
+  const ElfW(Sym) *symtab, *matchsym;
+  const char *strtab;
+
+  /* Find the highest-addressed object that ADDRESS is not below.  */
+  match = NULL;
+  for (l = _dl_loaded; l; l = l->l_next)
+    if (addr >= l->l_addr && !match || match->l_addr < l->l_addr)
+      match = l;
+
+  if (match)
+    {
+      /* We know ADDRESS lies within MATCH if in any shared object.
+	 Make sure it isn't past the end of MATCH's segments.  */
+      size_t n = match->l_phnum;
+      do
+	--n;
+      while (match->l_phdr[n].p_type != PT_LOAD);
+      if (addr >= (match->l_addr +
+		   match->l_phdr[n].p_vaddr + match->l_phdr[n].p_memsz))
+	/* Off the end of the highest-addressed shared object.  */
+	return 0;
+    }
+  else
+    return 0;
+
+  /* Now we know what object the address lies in.  */
+  info->dli_fname = match->l_name;
+  info->dli_fbase = (void *) match->l_addr;
+
+  symtab = ((void *) match->l_addr + match->l_info[DT_SYMTAB]->d_un.d_ptr);
+  strtab = ((void *) match->l_addr + match->l_info[DT_STRTAB]->d_un.d_ptr);
+
+  /* We assume that the string table follows the symbol table, because
+     there is no way in ELF to know the size of the dynamic symbol table!!  */
+  for (matchsym = NULL; (void *) symtab < (void *) strtab; ++symtab)
+    if (addr >= match->l_addr + symtab->st_value && !matchsym ||
+	matchsym->st_value < symtab->st_value &&
+	ELFW(ST_BIND) (symtab->st_info) == STB_GLOBAL ||
+	ELFW(ST_BIND) (symtab->st_info) == STB_WEAK)
+      matchsym = symtab;
+
+  if (matchsym)
+    {
+      /* We found a symbol close by.  Fill in its name and exact address.  */
+      info->dli_sname = strtab + matchsym->st_name;
+      info->dli_saddr = (void *) (match->l_addr + matchsym->st_value);
+    }
+  else
+    {
+      /* No symbol matches.  We return only the containing object.  */
+      info->dli_sname = NULL;
+      info->dli_saddr = NULL;
+    }
+
+  return 1;
+}