Patchwork [U-Boot,v2,4/9] x86: Add an __end symbol to signal the end of the U-Boot binary

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Submitter Simon Glass
Date March 1, 2013, 5:26 a.m.
Message ID <1362115578-12165-4-git-send-email-sjg@chromium.org>
Download mbox | patch
Permalink /patch/224237/
State Accepted, archived
Delegated to: Simon Glass
Headers show

Comments

Simon Glass - March 1, 2013, 5:26 a.m.
With this symbol we can easy append something (e.g. an FDT) to the U-Boot
binary and access it from within U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
Changes in v2:
- Use _end instead of __end to fit in with other archs

 arch/x86/cpu/u-boot.lds           | 2 ++
 arch/x86/include/asm/u-boot-x86.h | 1 +
 arch/x86/lib/init_helpers.c       | 2 +-
 3 files changed, 4 insertions(+), 1 deletion(-)

Patch

diff --git a/arch/x86/cpu/u-boot.lds b/arch/x86/cpu/u-boot.lds
index 2313cd7..8e185f3 100644
--- a/arch/x86/cpu/u-boot.lds
+++ b/arch/x86/cpu/u-boot.lds
@@ -67,6 +67,8 @@  SECTIONS
 	__rel_dyn_start = .;
 	.rel.dyn : { *(.rel.dyn) }
 	__rel_dyn_end = .;
+	. = ALIGN(4);
+	_end = .;
 
 	/DISCARD/ : { *(.dynstr*) }
 	/DISCARD/ : { *(.dynamic*) }
diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index 99062e5..948615d 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -31,6 +31,7 @@  extern ulong __rel_dyn_start;
 extern ulong __rel_dyn_end;
 extern ulong __bss_start;
 extern ulong __bss_end;
+extern ulong _end;
 
 /* cpu/.../cpu.c */
 int x86_cpu_init_r(void);
diff --git a/arch/x86/lib/init_helpers.c b/arch/x86/lib/init_helpers.c
index 1a097f1..ff2d21f 100644
--- a/arch/x86/lib/init_helpers.c
+++ b/arch/x86/lib/init_helpers.c
@@ -188,7 +188,7 @@  int find_fdt(void)
 	gd->fdt_blob = _binary_dt_dtb_start;
 #elif defined CONFIG_OF_SEPARATE
 	/* FDT is at end of image */
-	gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
+	gd->fdt_blob = (ulong *)&_end;
 #endif
 	/* Allow the early environment to override the fdt address */
 	gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,