[PATCH 7/7] arm-uboot: support relocation at installation time

[Ian Campbell <ijc@hellion.org.uk>]

Partially link kernel.img and take advantage of the new
PLATFORM_FLAGS_ABS_RELOC support to link the final kernel image for a
particular address.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
---
 grub-core/Makefile.core.def | 2 +-
 include/grub/offsets.h      | 2 +-
 util/mkimage.c              | 8 ++++----
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index e5e558c..f14a2c4 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -95,7 +95,7 @@ kernel = {
   i386_qemu_cppflags     = '-DGRUB_BOOT_MACHINE_LINK_ADDR=$(GRUB_BOOT_MACHINE_LINK_ADDR)';
   emu_cflags = '$(CFLAGS_GNULIB)';
   emu_cppflags = '$(CPPFLAGS_GNULIB)';
-  arm_uboot_ldflags       = '-Wl,-Ttext=0x08000000';
+  arm_uboot_ldflags       = '-Wl,-r,-d';
   arm_uboot_stripflags    = '--strip-unneeded -K start -R .note -R .comment -R .note.gnu.gold-version';
 
   i386_pc_startup = kern/i386/pc/startup.S;
diff --git a/include/grub/offsets.h b/include/grub/offsets.h
index 85e7401..bb14190 100644
--- a/include/grub/offsets.h
+++ b/include/grub/offsets.h
@@ -120,7 +120,7 @@
 
 #define GRUB_KERNEL_ARM_UBOOT_MOD_ALIGN 	0x8
 #define GRUB_KERNEL_ARM_UBOOT_TOTAL_MODULE_SIZE	0x4
-#define GRUB_KERNEL_ARM_UBOOT_LINK_ADDR		0x08000000
+#define GRUB_KERNEL_ARM_UBOOT_DEFAULT_LINK_ADDR 0x08000000
 
 /* Minimal gap between _end and the start of the modules.  It's a hack
    for PowerMac to prevent "CLAIM failed" error.  The real fix is to
diff --git a/util/mkimage.c b/util/mkimage.c
index 7b29acf..112092e 100644
--- a/util/mkimage.c
+++ b/util/mkimage.c
@@ -549,14 +549,14 @@ static const struct grub_install_image_target_desc image_targets[] =
       .voidp_sizeof = 4,
       .bigendian = 0,
       .id = IMAGE_UBOOT, 
-      .flags = PLATFORM_FLAGS_NONE,
+      .flags = PLATFORM_FLAGS_ABS_RELOC,
       .total_module_size = GRUB_KERNEL_ARM_UBOOT_TOTAL_MODULE_SIZE,
       .decompressor_compressed_size = TARGET_NO_FIELD,
       .decompressor_uncompressed_size = TARGET_NO_FIELD,
       .decompressor_uncompressed_addr = TARGET_NO_FIELD,
       .section_align = GRUB_KERNEL_ARM_UBOOT_MOD_ALIGN,
       .vaddr_offset = 0,
-      .link_addr = GRUB_KERNEL_ARM_UBOOT_LINK_ADDR,
+      .link_addr = GRUB_KERNEL_ARM_UBOOT_DEFAULT_LINK_ADDR,
       .elf_target = EM_ARM,
       .mod_gap = GRUB_KERNEL_ARM_UBOOT_MOD_GAP,
       .mod_align = GRUB_KERNEL_ARM_UBOOT_MOD_ALIGN,
@@ -1802,8 +1802,8 @@ grub_install_generate_image (const char *dir, const char *prefix,
       hdr->ih_magic = grub_cpu_to_be32_compile_time (GRUB_UBOOT_IH_MAGIC);
       hdr->ih_time = grub_cpu_to_be32 (time (0));
       hdr->ih_size = grub_cpu_to_be32 (core_size);
-      hdr->ih_load = grub_cpu_to_be32 (image_target->link_addr);
-      hdr->ih_ep = grub_cpu_to_be32 (image_target->link_addr);
+      hdr->ih_load = grub_cpu_to_be32 (target_address);
+      hdr->ih_ep = grub_cpu_to_be32 (start_address);
       hdr->ih_type = GRUB_UBOOT_IH_TYPE_KERNEL;
       hdr->ih_os = GRUB_UBOOT_IH_OS_LINUX;
       hdr->ih_arch = GRUB_UBOOT_IH_ARCH_ARM;
-- 
1.8.4.rc3