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authorUlrich Drepper <drepper@redhat.com>1997-09-27 00:21:42 +0000
committerUlrich Drepper <drepper@redhat.com>1997-09-27 00:21:42 +0000
commita2b08ee54130cf3a74655856e6ca6c29874a9df2 (patch)
tree71e7d867304f432bc57043e0c54a5cf101835651 /elf/dl-addr.c
parent650425ceb40e840b2123b6c8cc65389589f41218 (diff)
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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.
Diffstat (limited to 'elf/dl-addr.c')
-rw-r--r--elf/dl-addr.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/elf/dl-addr.c b/elf/dl-addr.c
new file mode 100644
index 0000000..d50cc4b
--- /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;
+}