package/elfutils: fix build with glibc < 2.16

Fixes:
 - autobuild.buildroot.net/results/1053e2b4b51bc225c4a1a29c93946101a7a53be9

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/package/elfutils/0004-libelf-Fix-possible-resource-leak-in-elf-32-64-_updatefile.patch b/package/elfutils/0004-libelf-Fix-possible-resource-leak-in-elf-32-64-_updatefile.patch
new file mode 100644 (file)
index 0000000..ab76bd7
--- /dev/null
+++ b/package/elfutils/0004-libelf-Fix-possible-resource-leak-in-elf-32-64-_updatefile.patch
@@ -0,0 +1,32 @@
+From 75e147d0ab85262d9bb2fff093db7ce67dbd4b62 Mon Sep 17 00:00:00 2001
+From: Mark Wielaard <mark@klomp.org>
+Date: Wed, 6 Mar 2019 19:56:54 +0100
+Subject: [PATCH] libelf: Fix possible resource leak in elf[32|64]_updatefile.
+
+When we cannot allocate enough memory to convert the data in
+updatemmap we should free the scns before returning an error.
+
+Signed-off-by: Mark Wielaard <mark@klomp.org>
+[Retrieved (and slightly updated to remove ChangeLog update) from:
+https://sourceware.org/git/?p=elfutils.git;a=patch;h=75e147d0ab85262d9bb2fff093db7ce67dbd4b62]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ libelf/elf32_updatefile.c | 1 +
+ 2 files changed, 6 insertions(+)
+
+       * gelf_xlate.c (__elf_xfctstof): Remove alias.
+diff --git a/libelf/elf32_updatefile.c b/libelf/elf32_updatefile.c
+index 2899c6f..457d18e 100644
+--- a/libelf/elf32_updatefile.c
++++ b/libelf/elf32_updatefile.c
+@@ -365,6 +365,7 @@ __elfw2(LIBELFBITS,updatemmap) (Elf *elf, int change_bo, size_t shnum)
+                           char *converted = aligned_alloc (align, size);
+                           if (converted == NULL)
+                             {
++                              free (scns);
+                               __libelf_seterrno (ELF_E_NOMEM);
+                               return 1;
+                             }
+-- 
+2.9.3
+

diff --git a/package/elfutils/0005-libelf-Use-posix_memalign-instead-of-aligned_alloc.patch b/package/elfutils/0005-libelf-Use-posix_memalign-instead-of-aligned_alloc.patch
new file mode 100644 (file)
index 0000000..70f1f9a
--- /dev/null
+++ b/package/elfutils/0005-libelf-Use-posix_memalign-instead-of-aligned_alloc.patch
@@ -0,0 +1,58 @@
+From 6bd060a23f43a842fbc37dd1bb8d6d7964eda36e Mon Sep 17 00:00:00 2001
+From: Mark Wielaard <mark@klomp.org>
+Date: Thu, 7 Mar 2019 17:31:53 +0100
+Subject: [PATCH] libelf: Use posix_memalign instead of aligned_alloc.
+
+Older glibc might not have aligned_alloc (it is C11).
+Use posix_memalign instead. posix_memalign requires the alignment to
+be a multiple of sizeof (void *). So use malloc for smaller alignments.
+
+Signed-off-by: Mark Wielaard <mark@klomp.org>
+[Retrieved (and slighlty updated to remove ChangeLog update) from:
+https://sourceware.org/git/?p=elfutils.git;a=patch;h=6bd060a23f43a842fbc37dd1bb8d6d7964eda36e]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ libelf/elf32_updatefile.c | 20 +++++++++++++++++---
+ 2 files changed, 22 insertions(+), 3 deletions(-)
+
+diff --git a/libelf/elf32_updatefile.c b/libelf/elf32_updatefile.c
+index 457d18e..eea51a7 100644
+--- a/libelf/elf32_updatefile.c
++++ b/libelf/elf32_updatefile.c
+@@ -360,16 +360,30 @@ __elfw2(LIBELFBITS,updatemmap) (Elf *elf, int change_bo, size_t shnum)
+                       else
+                         {
+                           /* We have to do the conversion on properly
+-                             aligned memory first.  */
++                             aligned memory first.  align is a power of 2,
++                             but posix_memalign only works for alignments
++                             which are a multiple of sizeof (void *).
++                             So use normal malloc for smaller alignments.  */
+                           size_t size = dl->data.d.d_size;
+-                          char *converted = aligned_alloc (align, size);
++                          void *converted;
++                          if (align < sizeof (void *))
++                            converted = malloc (size);
++                          else
++                            {
++                              int res;
++                              res = posix_memalign (&converted, align, size);
++                              if (res != 0)
++                                converted = NULL;
++                            }
++
+                           if (converted == NULL)
+                             {
+                               free (scns);
+                               __libelf_seterrno (ELF_E_NOMEM);
+                               return 1;
+                             }
+-                            (*fctp) (converted, dl->data.d.d_buf, size, 1);
++
++                          (*fctp) (converted, dl->data.d.d_buf, size, 1);
+ 
+                           /* And then write it to the mmapped file.  */
+                           memcpy (last_position, converted, size);
+-- 
+2.9.3
+