Binfmt_flat: Add minimum support for the Blackfin relocations

Add minimum support for the Blackfin relocations, since we don't have
enough space in each reloc.  The idea is to store a value with one
relocation so that subsequent ones can access it.

Actually, this patch is required for Blackfin.  Currently if BINFMT_FLAT is
enabled, git-tree kernel will fail to compile.

Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: David McCullough <davidm@snapgear.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Miles Bader <miles.bader@necel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 861141b4f6d6..34e9b06a7444 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -742,6 +742,7 @@ static int load_flat_file(struct linux_binprm * bprm,
          * __start to address 4 so that is okay).
          */
         if (rev > OLD_FLAT_VERSION) {
+                unsigned long persistent = 0;
                 for (i=0; i < relocs; i++) {
                         unsigned long addr, relval;
 
@@ -749,6 +750,8 @@ static int load_flat_file(struct linux_binprm * bprm,
                            relocated (of course, the address has to be
                            relocated first).  */
                         relval = ntohl(reloc[i]);
+                        if (flat_set_persistent (relval, &persistent))
+                                continue;
                         addr = flat_get_relocate_addr(relval);
                         rp = (unsigned long *) calc_reloc(addr, libinfo, id, 1);
                         if (rp == (unsigned long *)RELOC_FAILED) {
@@ -757,7 +760,7 @@ static int load_flat_file(struct linux_binprm * bprm,
                         }
 
                         /* Get the pointer's value.  */
-                        addr = flat_get_addr_from_rp(rp, relval, flags);
+                        addr = flat_get_addr_from_rp(rp, relval, flags, &persistent);
                         if (addr != 0) {
                                 /*
                                  * Do the relocation.  PIC relocs in the data section are