[RFC PATCH 18/23] .TOC. symbol is special in ppc64le

[Ram Pai]

 .TOC. symbol is special in ppc64le . It maps to the
 address of the .toc section.

Signed-off-by: Ram Pai <address@hidden>
---
 grub-core/kern/dl.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/grub-core/kern/dl.c b/grub-core/kern/dl.c
index de2d0ed..ce2ff38 100644
--- a/grub-core/kern/dl.c
+++ b/grub-core/kern/dl.c
@@ -343,6 +343,26 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
   return GRUB_ERR_NONE;
 }
 
+#ifdef __powerpc64le__
+static int
+grub_dl_find_section_index (Elf_Ehdr *e, const char *name)
+{ 
+  Elf_Shdr *s;
+  const char *str;
+  unsigned i;
+
+  s = (Elf_Shdr *) ((char *) e + e->e_shoff + e->e_shstrndx * e->e_shentsize);
+  str = (char *) e + s->sh_offset;
+
+  for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
+       i < e->e_shnum;
+       i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize))
+    if (grub_strcmp (str + s->sh_name, name) == 0)
+      return i;
+  return -1;
+}
+#endif
+
 static grub_err_t
 grub_dl_resolve_symbols (grub_dl_t mod, Elf_Ehdr *e)
 {
@@ -392,7 +412,19 @@ grub_dl_resolve_symbols (grub_dl_t mod, Elf_Ehdr *e)
          /* Resolve a global symbol.  */
          if (sym->st_name != 0 && sym->st_shndx == 0)
            {
-             grub_symbol_t nsym = grub_dl_resolve_symbol (name);
+             grub_symbol_t nsym;
+
+#ifdef __powerpc64le__
+              if (grub_strcmp(name, ".TOC.") == 0) {
+                int j = grub_dl_find_section_index (e, ".toc");
+                if (j < 0)
+                    return grub_error (GRUB_ERR_BAD_MODULE,
+                                   N_("section '.toc' not found"), name);
+                sym->st_value = (Elf_Addr) grub_dl_get_section_addr (mod, j);
+                break;
+              }
+#endif
+             nsym = grub_dl_resolve_symbol (name);
              if (! nsym)
                return grub_error (GRUB_ERR_BAD_MODULE,
                                   N_("symbol `%s' not found"), name);
-- 
1.8.5.3