[PATCH 1/4] unicore32-oldabi: add CONFIG_UNICORE32_OLDABI for distinguishing two ABIs

[gxt]

From: Guan Xuetao <gxt@xxxxxxxxxxxxxxx>

Signed-off-by: Guan Xuetao <gxt@xxxxxxxxxxxxxxx>
Signed-off-by: Qin Rui <qinrui@xxxxxxxxxx>
---
 arch/unicore32/Kconfig | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 928237a..e5d25b4 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -72,6 +72,17 @@ source "kernel/Kconfig.freezer"
 
 menu "System Type"
 
+config UNICORE32_OLDABI
+	bool "Allow old ABI binaries to run with this kernel"
+	default y
+	help
+	  This option preserves the old syscall interface instead of the
+	  asm-generic one. It also provides a compatibility layer to
+	  intercept syscalls that have structure arguments which layout
+	  in memory differs between the asm-generic ABI and this old one.
+
+	  If in doubt, say Y.
+
 config MMU
 	def_bool y
 
-- 
2.0.0.GIT

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