rmodule: Support for ARMv7 relocations
This is needed for early vboot selection
Signed-off-by: Stefan Reinauer <reinauer@google.com>
BRANCH=none
TEST=needs further changes
BUG=none
Change-Id: Ibfd36c59e96513b65f5ff5239b4ecc02e807039b
Reviewed-on: https://chromium-review.googlesource.com/167401
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: Stefan Reinauer <reinauer@google.com>
Commit-Queue: Stefan Reinauer <reinauer@google.com>
diff --git a/src/lib/rmodule.c b/src/lib/rmodule.c
index b56ec32..783aa0a 100644
--- a/src/lib/rmodule.c
+++ b/src/lib/rmodule.c
@@ -60,6 +60,40 @@
return (void *)rel;
}
+#elif CONFIG_ARCH_ARMV7
+/*
+ * On ARMv7, the only relocations currently allowed are R_ARM_RELATIVE which
+ * have '0' for the symbol info in the relocation metadata (in r_info).
+ * The reason is that the module is fully linked and just has the relocations'
+ * locations.
+ */
+typedef struct {
+ u32 r_offset;
+ u32 r_info;
+} Elf32_Rel;
+
+#define R_ARM_RELATIVE 23
+
+#define RELOCTION_ENTRY_SIZE sizeof(Elf32_Rel)
+static inline int rmodule_reloc_offset(const void *reloc)
+{
+ const Elf32_Rel *rel = reloc;
+ return rel->r_offset;
+}
+
+static inline int rmodule_reloc_valid(const void *reloc)
+{
+ const Elf32_Rel *rel = reloc;
+ return (rel->r_info == R_ARM_RELATIVE);
+}
+
+static inline void *remodule_next_reloc(const void *reloc)
+{
+ const Elf32_Rel *rel = reloc;
+ rel++;
+ return (void *)rel;
+}
+
#else
#error Arch needs to add relocation information support for RMODULE
#endif
