From fce244762775f662f5a278a05a6e494b6e4f2774 Mon Sep 17 00:00:00 2001 From: Mark Salter Date: Mon, 23 Apr 2012 10:02:08 -0400 Subject: C6X: add support to build with BINFMT_ELF_FDPIC C6x userspace supports a shared library mechanism called DSBT for systems with no MMU. DSBT is similar to FDPIC in allowing shared text segments and private copies of data segments without an MMU. Both methods access data using a base register and offset. With FDPIC, the caller of an external function sets up the base register for the callee. With DSBT, the called function sets up its own base register. Other details differ but both userspaces need the same thing from the kernel loader: a map of where each ELF segment was loaded. The FDPIC loader already provides this, so DSBT just uses it. This patch enables BINFMT_ELF_FDPIC by default for C6X and provides the necessary architecture hooks for the generic loader. Signed-off-by: Mark Salter --- fs/Kconfig.binfmt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/Kconfig.binfmt') diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt index e95d1b64082c..022574202749 100644 --- a/fs/Kconfig.binfmt +++ b/fs/Kconfig.binfmt @@ -33,7 +33,7 @@ config ARCH_BINFMT_ELF_RANDOMIZE_PIE config BINFMT_ELF_FDPIC bool "Kernel support for FDPIC ELF binaries" default y - depends on (FRV || BLACKFIN || (SUPERH32 && !MMU)) + depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X) help ELF FDPIC binaries are based on ELF, but allow the individual load segments of a binary to be located in memory independently of each -- cgit v1.2.3-70-g09d2