From: Vladimir Zapolskiy <vz@mleia.com>
Date: Sun, 27 Nov 2016 22:15:35 +0000 (+0200)
Subject: sh: generate position independent code for all platforms
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=76a55989b180d1d9ab273fde01e5b2a18413fadf;p=u-boot.git

sh: generate position independent code for all platforms

Finally add fpic compilation option to produce relocatable code.
Note that this requires to define CONFIG_NEEDS_MANUAL_RELOC for all
board files, also relocation support still has some limitations
(e.g. a developer should care not to overwrite the executing code or
memset() with zeroes not yet relocated data on malloc init etc.),
which may be fixed while switching to PIE.

Due to short investigation the architecture code is not ready for PIE
linking, this will require some manipulations with .dyn* sections.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
---

diff --git a/arch/sh/config.mk b/arch/sh/config.mk
index 673ed8dfa4..71540c8bb2 100644
--- a/arch/sh/config.mk
+++ b/arch/sh/config.mk
@@ -15,5 +15,6 @@ CONFIG_STANDALONE_LOAD_ADDR += -EB
 endif
 
 PLATFORM_CPPFLAGS += -DCONFIG_SH -D__SH__
+PLATFORM_RELFLAGS += -fpic
 LDFLAGS_FINAL = --gc-sections
 PLATFORM_RELFLAGS += -ffixed-r13
diff --git a/arch/sh/cpu/u-boot.lds b/arch/sh/cpu/u-boot.lds
index f2e48c6eca..bbf9ff485f 100644
--- a/arch/sh/cpu/u-boot.lds
+++ b/arch/sh/cpu/u-boot.lds
@@ -60,7 +60,7 @@ SECTIONS
 	PROVIDE (_fgot = .);
 	.got :
 	{
-		*(.got)
+		*(.got.plt) *(.got)
 		. = ALIGN(4);
 	} >ram
 	PROVIDE (_egot = .);