elf_getshdr should work for elf->flags & ELF_F_MALLOCED.
Reported-by: Nick Alcock <nix@esperi.org.uk>
Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/tests/test-elf_cntl_gelf_getshdr.c b/tests/test-elf_cntl_gelf_getshdr.c
new file mode 100644
index 0000000..b561b53
--- /dev/null
+++ b/tests/test-elf_cntl_gelf_getshdr.c
@@ -0,0 +1,103 @@
+/* Copyright (C) 2012 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file 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; either version 3 of the License, or
+ (at your option) any later version.
+
+ 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 this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <gelf.h>
+#include <libelf.h>
+#include <stdbool.h>
+#include <inttypes.h>
+
+int
+main (int argc, char *argv[])
+{
+ if (argc != 3)
+ {
+ fprintf (stderr, "Needs two arguments.\n");
+ fprintf (stderr, "First needs to be 'READ', 'MMAP' or 'FDREAD'\n");
+ fprintf (stderr, "Second is the ELF file to read.\n");
+ exit (2); /* user error */
+ }
+
+ bool do_mmap = false;
+ bool close_fd = false;
+ if (strcmp (argv[1], "READ") == 0)
+ {
+ do_mmap = false;
+ close_fd = false;
+ }
+ else if (strcmp (argv[1], "MMAP") == 0)
+ {
+ do_mmap = true;
+ close_fd = false;
+ }
+ else if (strcmp (argv[1], "FDREAD") == 0)
+ {
+ do_mmap = false;
+ close_fd = true;
+ }
+ else
+ {
+ fprintf (stderr, "First arg needs to be 'READ', 'MMAP' or 'FDREAD'\n");
+ exit (2); /* user error */
+ }
+
+ elf_version (EV_CURRENT);
+
+ int fd = open (argv[2], O_RDONLY);
+ if (fd < 0)
+ {
+ fprintf (stderr, "Cannot open input file %s: %s\n", argv[2],
+ strerror (errno));
+ exit (2);
+ }
+
+ Elf *elf = elf_begin (fd, do_mmap ? ELF_C_READ_MMAP : ELF_C_READ, NULL);
+ if (elf == NULL)
+ {
+ fprintf (stderr, "elf_begin failed for %s: %s\n", argv[2],
+ elf_errmsg (-1));
+ exit (2);
+ }
+
+ if (! do_mmap && close_fd)
+ {
+ if (elf_cntl (elf, ELF_C_FDREAD) < 0)
+ {
+ fprintf (stderr, "elf_cntl failed for %s: %s\n", argv[2],
+ elf_errmsg (-1));
+ exit (1);
+ }
+ close (fd);
+ }
+
+ Elf_Scn *scn = NULL;
+ while ((scn = elf_nextscn (elf, scn)) != NULL)
+ {
+ GElf_Shdr shdr_mem;
+ GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
+ printf ("Section at offset %#0" PRIx64 "\n", shdr->sh_offset);
+ }
+
+ elf_end (elf);
+ exit (0);
+}