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authorMark Salter <msalter@redhat.com>2012-04-23 10:02:08 -0400
committerMark Salter <msalter@redhat.com>2012-05-15 09:17:34 -0400
commitfce244762775f662f5a278a05a6e494b6e4f2774 (patch)
tree4cc7c031181760963f73570c12cec1449011dbb8 /fs/Kconfig.binfmt
parent18d14704d66f651395a68c8a70c86f0a22bccb31 (diff)
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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 <msalter@redhat.com>
Diffstat (limited to 'fs/Kconfig.binfmt')
-rw-r--r--fs/Kconfig.binfmt2
1 files changed, 1 insertions, 1 deletions
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