File elfutils-0.137-dwfl_getmodules-fixes.diff of Package elfutils

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File elfutils-0.137-dwfl_getmodules-fixes.diff of Package elfutils (Revision ce44dbb384e553789ec9a762b85e2584)

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From: Roland McGrath <roland@redhat.com>
Date: Wed, 3 Dec 2008 03:41:58 +0000 (+0000)
Subject: src/
X-Git-Url: http://git.fedorahosted.org/git/elfutils.git?p=elfutils.git;a=commitdiff_plain;h=a845f68bf43f90e0670ed6b33154f2aff98ad46b

src/
2008-12-02  Roland McGrath  <roland@redhat.com>

* readelf.c (count_dwflmod, process_file): Don't presume encoding of
	nonzero OFFSET argument to dwfl_getmodules.
---

diff --git a/backends/Makefile.am b/backends/Makefile.am
index ebf6b09..5b55294 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -146,7 +146,7 @@ uninstall: uninstall-am
 	done
 	rmdir --ignore-fail-on-non-empty $(DESTDIR)$(libdir)/$(LIBEBL_SUBDIR)
 
-noinst_HEADERS = libebl_CPU.h common-reloc.c linux-core-note.c
+noinst_HEADERS = libebl_CPU.h common-reloc.c linux-core-note.c x86_corenote.c
 EXTRA_DIST = $(foreach m,$(modules),$($(m)_SRCS)) $(modules:=_reloc.def)
 
 CLEANFILES = *.gcno *.gcda \
diff --git a/backends/i386_corenote.c b/backends/i386_corenote.c
index 02d8ec3..c371c4c 100644
--- a/backends/i386_corenote.c
+++ b/backends/i386_corenote.c
@@ -103,9 +103,8 @@ static const Ebl_Register_Location prxfpreg_regs[] =
 #define	EXTRA_NOTES \
   EXTRA_REGSET (NT_PRFPXREG, 512, prxfpreg_regs) \
   case NT_386_TLS: \
-    return tls_info (descsz, regs_offset, nregloc, reglocs, nitems, items);
-
-#define NT_386_TLS	0x200		/* i386 TLS slots (struct user_desc) */
+    return tls_info (descsz, regs_offset, nregloc, reglocs, nitems, items); \
+  EXTRA_NOTES_IOPERM
 
 static const Ebl_Core_Item tls_items[] =
   {
@@ -131,4 +130,5 @@ tls_info (GElf_Word descsz, GElf_Word *regs_offset,
   return 1;
 }
 
+#include "x86_corenote.c"
 #include "linux-core-note.c"
diff --git a/backends/x86_64_corenote.c b/backends/x86_64_corenote.c
index c2bc72e..552ac88 100644
--- a/backends/x86_64_corenote.c
+++ b/backends/x86_64_corenote.c
@@ -1,5 +1,5 @@
 /* x86-64 specific core note handling.
-   Copyright (C) 2005, 2007 Red Hat, Inc.
+   Copyright (C) 2005, 2007, 2008 Red Hat, Inc.
    This file is part of Red Hat elfutils.
 
    Red Hat elfutils is free software; you can redistribute it and/or modify
@@ -103,4 +103,7 @@ static const Ebl_Register_Location fpregset_regs[] =
   };
 #define FPREGSET_SIZE	512
 
+#define	EXTRA_NOTES	EXTRA_NOTES_IOPERM
+
+#include "x86_corenote.c"
 #include "linux-core-note.c"
diff --git a/backends/x86_corenote.c b/backends/x86_corenote.c
new file mode 100644
index 0000000..7d55067
--- /dev/null
+++ b/backends/x86_corenote.c
@@ -0,0 +1,47 @@
+/* x86-specific core note handling, pieces common to x86-64 and i386.
+   Copyright (C) 2005, 2008 Red Hat, Inc.
+   This file is part of Red Hat elfutils.
+
+   Red Hat elfutils is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by the
+   Free Software Foundation; version 2 of the License.
+
+   Red Hat elfutils 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with Red Hat elfutils; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
+
+   Red Hat elfutils is an included package of the Open Invention Network.
+   An included package of the Open Invention Network is a package for which
+   Open Invention Network licensees cross-license their patents.  No patent
+   license is granted, either expressly or impliedly, by designation as an
+   included package.  Should you wish to participate in the Open Invention
+   Network licensing program, please visit www.openinventionnetwork.com
+   <http://www.openinventionnetwork.com>.  */
+
+#define	EXTRA_NOTES_IOPERM \
+  case NT_386_IOPERM: \
+    return ioperm_info (descsz, regs_offset, nregloc, reglocs, nitems, items);
+
+static int
+ioperm_info (GElf_Word descsz, GElf_Word *regs_offset,
+	     size_t *nregloc, const Ebl_Register_Location **reglocs,
+	     size_t *nitems, const Ebl_Core_Item **items)
+{
+  static const Ebl_Core_Item ioperm_item =
+    { .type = ELF_T_WORD, .format = 'b', .name = "ioperm" };
+
+  if (descsz % 4 != 0)
+    return 0;
+
+  *regs_offset = 0;
+  *nregloc = 0;
+  *reglocs = NULL;
+  *nitems = 1;
+  *items = &ioperm_item;
+  return 1;
+}
diff --git a/libdwfl/dwfl_getmodules.c b/libdwfl/dwfl_getmodules.c
index f205b89..7c6ab97 100644
--- a/libdwfl/dwfl_getmodules.c
+++ b/libdwfl/dwfl_getmodules.c
@@ -59,49 +59,55 @@ dwfl_getmodules (Dwfl *dwfl,
   if (dwfl == NULL)
     return -1;
 
+  /* We iterate through the linked list when it's all we have.
+     But continuing from an offset is slow that way.  So when
+     DWFL->lookup_module is populated, we can instead keep our
+     place by jumping directly into the array.  Since the actions
+     of a callback could cause it to get populated, we must
+     choose the style of place-holder when we return an offset,
+     and we encode the choice in the low bits of that value.  */
+
   Dwfl_Module *m = dwfl->modulelist;
 
-  if (unlikely (dwfl->lookup_module == NULL))
+  if ((offset & 3) == 1)
     {
+      offset >>= 2;
       for (ptrdiff_t pos = 0; pos < offset; ++pos)
 	if (m == NULL)
 	  return -1;
 	else
 	  m = m->next;
-      while (m != NULL)
-	{
-	  ++offset;
-	  if ((*callback) (MODCB_ARGS (m), arg) != DWARF_CB_OK)
-	    return offset;
-	  m = m->next;
-	}
     }
-  else
+  else if (((offset & 3) == 2) && likely (dwfl->lookup_module != NULL))
     {
-      if (offset > 0)
-	{
-	  if ((size_t) offset - 1 == dwfl->lookup_elts)
-	    return 0;
+      offset >>= 2;
 
-	  if (unlikely ((size_t) offset - 1 > dwfl->lookup_elts))
-	    return -1;
+      if ((size_t) offset - 1 == dwfl->lookup_elts)
+	return 0;
 
-	  m = dwfl->lookup_module[offset - 1];
-	  if (unlikely (m == NULL))
-	    return -1;
-	}
+      if (unlikely ((size_t) offset - 1 > dwfl->lookup_elts))
+	return -1;
 
-      while (m != NULL)
-	{
-	  int ok = (*callback) (MODCB_ARGS (m), arg);
-	  m = m->next;
-	  if (ok != DWARF_CB_OK)
-	    return (m == NULL
-		    ? (ptrdiff_t) dwfl->lookup_elts + 1
-		    : m->segment + 1);
-	}
+      m = dwfl->lookup_module[offset - 1];
+      if (unlikely (m == NULL))
+	return -1;
+    }
+  else if (offset != 0)
+    {
+      __libdwfl_seterrno (DWFL_E_BADSTROFF);
+      return -1;
     }
 
+  while (m != NULL)
+    {
+      int ok = (*callback) (MODCB_ARGS (m), arg);
+      ++offset;
+      m = m->next;
+      if (ok != DWARF_CB_OK)
+	return ((dwfl->lookup_module == NULL) ? ((offset << 2) | 1)
+		: (((m == NULL ? (ptrdiff_t) dwfl->lookup_elts + 1
+		     : m->segment + 1) << 2) | 2));
+    }
   return 0;
 }
 INTDEF (dwfl_getmodules)
diff --git a/libdwfl/dwfl_module_build_id.c b/libdwfl/dwfl_module_build_id.c
index 903b79c..8725afb 100644
--- a/libdwfl/dwfl_module_build_id.c
+++ b/libdwfl/dwfl_module_build_id.c
@@ -1,5 +1,5 @@
 /* Return build ID information for a module.
-   Copyright (C) 2007 Red Hat, Inc.
+   Copyright (C) 2007, 2008 Red Hat, Inc.
    This file is part of Red Hat elfutils.
 
    Red Hat elfutils is free software; you can redistribute it and/or modify
@@ -88,7 +88,8 @@ check_notes (Dwfl_Module *mod, bool set, Elf_Data *data, GElf_Addr data_vaddr)
 						     "GNU", sizeof "GNU"))
       return found_build_id (mod, set,
 			     data->d_buf + desc_pos, nhdr.n_descsz,
-			     data_vaddr == NO_VADDR ? 0 : data_vaddr + pos);
+			     data_vaddr == NO_VADDR ? 0
+			     : data_vaddr + desc_pos);
   return 0;
 }
 
diff --git a/libebl/eblcorenotetypename.c b/libebl/eblcorenotetypename.c
index d01932f..9376cf5 100644
--- a/libebl/eblcorenotetypename.c
+++ b/libebl/eblcorenotetypename.c
@@ -56,7 +56,6 @@
 #include <stdio.h>
 #include <libeblP.h>
 
-
 const char *
 ebl_core_note_type_name (ebl, type, buf, len)
      Ebl *ebl;
@@ -101,6 +100,7 @@ ebl_core_note_type_name (ebl, type, buf, len)
 	    KNOWNSTYPE (PPC_VMX);
 	    KNOWNSTYPE (PPC_SPE);
 	    KNOWNSTYPE (386_TLS);
+	    KNOWNSTYPE (386_IOPERM);
 #undef KNOWNSTYPE
 
 	  default:
diff --git a/libelf/elf.h b/libelf/elf.h
index a413446..b4d3475 100644
--- a/libelf/elf.h
+++ b/libelf/elf.h
@@ -608,7 +608,9 @@ typedef struct
 #define NT_PRXFPREG	0x46e62b7f	/* Contains copy of user_fxsr_struct */
 #define NT_PPC_VMX	0x100		/* PowerPC Altivec/VMX registers */
 #define NT_PPC_SPE	0x101		/* PowerPC SPE/EVR registers */
+#define NT_PPC_VSX	0x102		/* PowerPC VSX registers */
 #define NT_386_TLS	0x200		/* i386 TLS slots (struct user_desc) */
+#define NT_386_IOPERM	0x201		/* x86 io permission bitmap (1=deny) */
 
 /* Legal values for the note segment descriptor types for object files.  */
 
@@ -1397,6 +1399,7 @@ typedef struct
 #define STO_MIPS_INTERNAL		0x1
 #define STO_MIPS_HIDDEN			0x2
 #define STO_MIPS_PROTECTED		0x3
+#define STO_MIPS_PLT			0x8
 #define STO_MIPS_SC_ALIGN_UNUSED	0xff
 
 /* MIPS specific values for `st_info'.  */
@@ -1543,8 +1546,10 @@ typedef struct
 #define R_MIPS_TLS_TPREL_HI16	49	/* TP-relative offset, high 16 bits */
 #define R_MIPS_TLS_TPREL_LO16	50	/* TP-relative offset, low 16 bits */
 #define R_MIPS_GLOB_DAT		51
+#define R_MIPS_COPY		126
+#define R_MIPS_JUMP_SLOT        127
 /* Keep this the last entry.  */
-#define R_MIPS_NUM		52
+#define R_MIPS_NUM		128
 
 /* Legal values for p_type field of Elf32_Phdr.  */
 
@@ -1610,7 +1615,13 @@ typedef struct
 #define DT_MIPS_COMPACT_SIZE 0x7000002f /* (O32)Size of compact rel section. */
 #define DT_MIPS_GP_VALUE     0x70000030 /* GP value for aux GOTs.  */
 #define DT_MIPS_AUX_DYNAMIC  0x70000031 /* Address of aux .dynamic.  */
-#define DT_MIPS_NUM	     0x32
+/* The address of .got.plt in an executable using the new non-PIC ABI.  */
+#define DT_MIPS_PLTGOT	     0x70000032
+/* The base of the PLT in an executable using the new non-PIC ABI if that
+   PLT is writable.  For a non-writable PLT, this is omitted or has a zero
+   value.  */
+#define DT_MIPS_RWPLT        0x70000034
+#define DT_MIPS_NUM	     0x35
 
 /* Legal values for DT_MIPS_FLAGS Elf32_Dyn entry.  */
 
diff --git a/libelf/elf_getarhdr.c b/libelf/elf_getarhdr.c
index deeb56d..875b2a1 100644
--- a/libelf/elf_getarhdr.c
+++ b/libelf/elf_getarhdr.c
@@ -1,5 +1,5 @@
 /* Read header of next archive member.
-   Copyright (C) 1998, 1999, 2000, 2002 Red Hat, Inc.
+   Copyright (C) 1998, 1999, 2000, 2002, 2008 Red Hat, Inc.
    This file is part of Red Hat elfutils.
    Written by Ulrich Drepper <drepper@redhat.com>, 1998.
 
@@ -63,6 +63,9 @@ Elf_Arhdr *
 elf_getarhdr (elf)
      Elf *elf;
 {
+  if (elf == NULL)
+    return NULL;
+
   Elf *parent = elf->parent;
 
   /* Calling this function is not ok for any file type but archives.  */
@@ -78,7 +81,6 @@ elf_getarhdr (elf)
     /* Something went wrong.  Maybe there is no member left.  */
     return NULL;
 
-
   /* We can be sure the parent is an archive.  */
   assert (parent->kind == ELF_K_AR);
 
diff --git a/src/ChangeLog b/src/ChangeLog
index 4ef23a2..fb17835 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2008-12-02  Roland McGrath  <roland@redhat.com>
+
+	* readelf.c (count_dwflmod, process_file): Don't presume encoding of
+	nonzero OFFSET argument to dwfl_getmodules.
+
 2008-08-07  Roland McGrath  <roland@redhat.com>
 
 	* addr2line.c (main): Pass string to handle_address.
diff --git a/src/readelf.c b/src/readelf.c
index 7b599ec..2797a84 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -459,8 +459,10 @@ count_dwflmod (Dwfl_Module *dwflmod __attribute__ ((unused)),
 	       Dwarf_Addr base __attribute__ ((unused)),
 	       void *arg)
 {
-  *(bool *) arg = false;
-  return DWARF_CB_ABORT;
+  if (*(bool *) arg)
+    return DWARF_CB_ABORT;
+  *(bool *) arg = true;
+  return DWARF_CB_OK;
 }
 
 struct process_dwflmod_args
@@ -548,8 +550,11 @@ process_file (int fd, const char *fname, bool only_one)
       dwfl_report_end (dwfl, NULL, NULL);
 
       if (only_one)
-	/* Clear ONLY_ONE if we have multiple modules, from an archive.  */
-	dwfl_getmodules (dwfl, &count_dwflmod, &only_one, 1);
+	{
+	  /* Clear ONLY_ONE if we have multiple modules, from an archive.  */
+	  bool seen = false;
+	  only_one = dwfl_getmodules (dwfl, &count_dwflmod, &seen, 0) == 0;
+	}
 
       /* Process the one or more modules gleaned from this file.  */
       struct process_dwflmod_args a = { .fd = fd, .only_one = only_one };
diff --git a/tests/ChangeLog b/tests/ChangeLog
index 15e3818..b1471c1 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,15 @@
+2008-11-26  Roland McGrath  <roland@redhat.com>
+
+	* dwfl-bug-getmodules.c: New file.
+	* Makefile.am (noinst_PROGRAMS): Add it.
+	(dwfl_bug_getmodules_LDADD): New variable.
+
+2008-09-10  Roland McGrath  <roland@redhat.com>
+
+	* test-subr.sh (LC_ALL): Export it set to "C".
+	* run-dwfl-addr-sect.sh: Don't do it here.
+	* run-strings-test.sh: Likewise.
+
 2008-08-21  Denys Vlasenko  <dvlasenk@redhat.com>
 
 	* run-addrname-test.sh: Add a new case.
diff --git a/tests/Makefile.am b/tests/Makefile.am
index f57e432..b533521 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -59,7 +59,8 @@ noinst_PROGRAMS = arextract arsymtest newfile saridx scnnames sectiondump \
 		  show-abbrev hash newscn ecp dwflmodtest \
 		  find-prologues funcretval allregs rdwrmmap \
 		  dwfl-bug-addr-overflow arls dwfl-bug-fd-leak \
-		  dwfl-addr-sect dwfl-bug-report early-offscn
+		  dwfl-addr-sect dwfl-bug-report early-offscn \
+		  dwfl-bug-getmodules
 # get-ciefde
 asm_TESTS = asm-tst1 asm-tst2 asm-tst3 asm-tst4 asm-tst5 \
 	    asm-tst6 asm-tst7 asm-tst8 asm-tst9
@@ -229,6 +230,7 @@ dwfl_bug_addr_overflow_LDADD = $(libdw) $(libebl) $(libelf) $(libmudflap) -ldl
 arls_LDADD = $(libelf) $(libmudflap)
 dwfl_bug_fd_leak_LDADD = $(libdw) $(libebl) $(libelf) $(libmudflap) -ldl
 dwfl_bug_report_LDADD = $(libdw) $(libebl) $(libelf) $(libmudflap) -ldl
+dwfl_bug_getmodules_LDADD = $(libdw) $(libebl) $(libelf) $(libmudflap) -ldl
 dwfl_addr_sect_LDADD = $(libdw) $(libebl) $(libelf) $(libmudflap) -ldl
 sha1_tst_LDADD = $(libeu) $(libmudflap)
 
diff --git a/tests/dwfl-bug-getmodules.c b/tests/dwfl-bug-getmodules.c
new file mode 100644
index 0000000..f7042c0
--- /dev/null
+++ b/tests/dwfl-bug-getmodules.c
@@ -0,0 +1,74 @@
+/* Test program for dwfl_getmodules bug.
+   Copyright (C) 2008 Red Hat, Inc.
+   This file is part of Red Hat elfutils.
+
+   Red Hat elfutils is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by the
+   Free Software Foundation; version 2 of the License.
+
+   Red Hat elfutils 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with Red Hat elfutils; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
+
+   Red Hat elfutils is an included package of the Open Invention Network.
+   An included package of the Open Invention Network is a package for which
+   Open Invention Network licensees cross-license their patents.  No patent
+   license is granted, either expressly or impliedly, by designation as an
+   included package.  Should you wish to participate in the Open Invention
+   Network licensing program, please visit www.openinventionnetwork.com
+   <http://www.openinventionnetwork.com>.  */
+
+#include <config.h>
+#include ELFUTILS_HEADER(dwfl)
+
+#include <error.h>
+
+static const Dwfl_Callbacks callbacks =
+  {
+    .find_elf = dwfl_linux_proc_find_elf,
+    .find_debuginfo = dwfl_standard_find_debuginfo,
+  };
+
+static int
+iterate (Dwfl_Module *mod __attribute__ ((unused)),
+	 void **userdata __attribute__ ((unused)),
+	 const char *name __attribute__ ((unused)),
+	 Dwarf_Addr base, void *arg)
+{
+  if (base != 0x2000)
+    return DWARF_CB_OK;
+
+  if (dwfl_addrmodule (arg, 0x2100) == NULL)
+    error (1, 0, "dwfl_addrmodule: %s", dwfl_errmsg (-1));
+
+  return DWARF_CB_ABORT;
+}
+
+int
+main (void)
+{
+  Dwfl *dwfl = dwfl_begin (&callbacks);
+
+  dwfl_report_module (dwfl, "m1", 0, 0x1000);
+  dwfl_report_module (dwfl, "m2", 0x2000, 0x3000);
+  dwfl_report_module (dwfl, "m3", 0x4000, 0x5000);
+
+  dwfl_report_end (dwfl, NULL, NULL);
+
+  ptrdiff_t offset = dwfl_getmodules (dwfl, &iterate, dwfl, 0);
+  if (offset <= 0)
+    error (1, 0, "dwfl_getmodules: %s", dwfl_errmsg (-1));
+
+  offset = dwfl_getmodules (dwfl, &iterate, NULL, offset);
+  if (offset != 0)
+    error (1, 0, "dwfl_getmodules (%d): %s", (int) offset, dwfl_errmsg (-1));
+
+  dwfl_end (dwfl);
+
+  return 0;
+}
diff --git a/tests/run-dwfl-addr-sect.sh b/tests/run-dwfl-addr-sect.sh
index 69280f5..98666f3 100755
--- a/tests/run-dwfl-addr-sect.sh
+++ b/tests/run-dwfl-addr-sect.sh
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2007 Red Hat, Inc.
+# Copyright (C) 2007, 2008 Red Hat, Inc.
 # This file is part of Red Hat elfutils.
 #
 # Red Hat elfutils is free software; you can redistribute it and/or modify
@@ -27,7 +27,6 @@
 
 testfiles testfile43
 
-export LC_ALL=C
 testrun_compare ./dwfl-addr-sect -e testfile43 0x64 0x8 0x98 <<\EOF
 address 0x64 => module "" section 4 + 0
 address 0x8 => module "" section 1 + 0x8
diff --git a/tests/run-strings-test.sh b/tests/run-strings-test.sh
index cfd9d23..a5dac63 100755
--- a/tests/run-strings-test.sh
+++ b/tests/run-strings-test.sh
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2005, 2006 Red Hat, Inc.
+# Copyright (C) 2005, 2006, 2008 Red Hat, Inc.
 # This file is part of Red Hat elfutils.
 # Written by Ulrich Drepper <drepper@redhat.com>, 2005.
 #
@@ -29,9 +29,6 @@
 files="testfile `seq 2 9 | while read n; do echo testfile$n; done`"
 testfiles $files
 
-LC_ALL=C
-export LC_ALL
-
 testrun_compare ../src/strings -tx -f $files <<\EOF
 testfile:      f4 /lib/ld-linux.so.2
 testfile:     1c9 __gmon_start__
diff --git a/tests/test-subr.sh b/tests/test-subr.sh
index 7fda05a..cb34b93 100644
--- a/tests/test-subr.sh
+++ b/tests/test-subr.sh
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2005, 2007 Red Hat, Inc.
+# Copyright (C) 2005, 2007, 2008 Red Hat, Inc.
 # This file is part of Red Hat elfutils.
 #
 # Red Hat elfutils is free software; you can redistribute it and/or modify
@@ -30,6 +30,9 @@
 
 set -e
 
+#LC_ALL=C
+#export LC_ALL
+
 remove_files=
 trap 'rm -f $remove_files' 0

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File elfutils-0.137-dwfl_getmodules-fixes.diff of Package elfutils (Revision ce44dbb384e553789ec9a762b85e2584)

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