[U-Boot] [PATCH v2] zynq: Fix elf header generation

[Michal Simek]

This patch is here because of:
"arm: keep all sections in ELF file"
(sha1: 47ed5dd031d7d2c587e6afd386e79ccec1a1b7f7)

Our tools expect to have elf with only LOAD header.
Without this fix also PHDR, INTERP and DYNAMIC headers
are available in ELF.

Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

Changes in v2:
- Remove empty line from zynq-common.h
- Remove PXA linker script part
- Add comment to explain differences between our linker script
  and ARM one

Albert: We have discussed about patch via IRC that this
is reasonable solution.
I am sending it for a record and if it is fine I will add
it to my zynq branch and then will send you pull request.

---
 arch/arm/cpu/armv7/zynq/u-boot.lds | 99 ++++++++++++++++++++++++++++++++++++++
 include/configs/zynq-common.h      |  2 +
 2 files changed, 101 insertions(+)
 create mode 100644 arch/arm/cpu/armv7/zynq/u-boot.lds

diff --git a/arch/arm/cpu/armv7/zynq/u-boot.lds b/arch/arm/cpu/armv7/zynq/u-boot.lds
new file mode 100644
index 0000000..a68b050
--- /dev/null
+++ b/arch/arm/cpu/armv7/zynq/u-boot.lds
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2004-2008 Texas Instruments
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj at denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text :
+	{
+		*(.__image_copy_start)
+		CPUDIR/start.o (.text*)
+		*(.text*)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+	. = ALIGN(4);
+	.data : {
+		*(.data*)
+	}
+
+	. = ALIGN(4);
+
+	. = .;
+
+	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	}
+
+	. = ALIGN(4);
+
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
+
+	.rel_dyn_start :
+	{
+		*(.__rel_dyn_start)
+	}
+
+	.rel.dyn : {
+		*(.rel*)
+	}
+
+	.rel_dyn_end :
+	{
+		*(.__rel_dyn_end)
+	}
+
+	_end = .;
+
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+		__bss_base = .;
+	}
+
+	.bss __bss_base (OVERLAY) : {
+		*(.bss*)
+		 . = ALIGN(4);
+		 __bss_limit = .;
+	}
+
+	.bss_end __bss_limit (OVERLAY) : {
+		KEEP(*(.__bss_end));
+	}
+
+	/*
+	 * Zynq needs to discard more sections because the user
+	 * is expected to pass this image on to tools for boot.bin
+	 * generation that require them to be dropped.
+	 */
+	/DISCARD/ : { *(.dynsym) }
+	/DISCARD/ : { *(.dynbss*) }
+	/DISCARD/ : { *(.dynstr*) }
+	/DISCARD/ : { *(.dynamic*) }
+	/DISCARD/ : { *(.plt*) }
+	/DISCARD/ : { *(.interp*) }
+	/DISCARD/ : { *(.gnu*) }
+	/DISCARD/ : { *(.ARM.exidx*) }
+	/DISCARD/ : { *(.gnu.linkonce.armexidx.*) }
+}
diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index 5faffad..d6dc745 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -218,6 +218,8 @@
 # define CONFIG_SYS_MMC_MAX_DEVICE	1
 #endif

+#define CONFIG_SYS_LDSCRIPT  "arch/arm/cpu/armv7/zynq/u-boot.lds"
+
 /* Commands */
 #include <config_cmd_default.h>

--
1.8.2.3

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