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 <[email protected]>
MrVan · Dec 3, 2016 · 76a5598 · 76a5598
1 parent 3500581
commit 76a5598
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diff --git 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
@@ -60,7 +60,7 @@ SECTIONS
 	PROVIDE (_fgot = .);
 	.got :
 	{
-		*(.got)
+		*(.got.plt) *(.got)
 		. = ALIGN(4);
 	} >ram
 	PROVIDE (_egot = .);