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authorH. Peter Anvin <hpa@linux.intel.com>2012-05-08 21:22:24 +0300
committerH. Peter Anvin <hpa@linux.intel.com>2012-05-18 19:49:40 -0700
commit6520fe5564acf07ade7b18a1272db1184835c487 (patch)
tree363c95dea4c9202c2fbe1ebcfd9dd7b97c7422ac /scripts/Makefile
parent36be50515fe2aef61533b516fa2576a2c7fe7664 (diff)
downloadvexpress-lsk-6520fe5564acf07ade7b18a1272db1184835c487.tar.gz
x86, realmode: 16-bit real-mode code support for relocs tool
A new option is added to the relocs tool called '--realmode'. This option causes the generation of 16-bit segment relocations and 32-bit linear relocations for the real-mode code. When the real-mode code is moved to the low-memory during kernel initialization, these relocation entries can be used to relocate the code properly. In the assembly code 16-bit segment relocations must be relative to the 'real_mode_seg' absolute symbol. Linear relocations must be relative to a symbol prefixed with 'pa_'. 16-bit segment relocation is used to load cs:ip in 16-bit code. Linear relocations are used in the 32-bit code for relocatable data references. They are declared in the linker script of the real-mode code. The relocs tool is moved to arch/x86/tools/relocs.c, and added new target archscripts that can be used to build scripts needed building an architecture. be compiled before building the arch/x86 tree. [ hpa: accelerating this because it detects invalid absolute relocations, a serious bug in binutils 2.22.52.0.x which currently produces bad kernels. ] Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-2-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org>
Diffstat (limited to 'scripts/Makefile')
-rw-r--r--scripts/Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/Makefile b/scripts/Makefile
index df7678febf2..36266665dbc 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -8,6 +8,8 @@
# conmakehash: Create arrays for initializing the kernel console tables
# docproc: Used in Documentation/DocBook
+HOST_EXTRACFLAGS += -I$(srctree)/tools/include
+
hostprogs-$(CONFIG_KALLSYMS) += kallsyms
hostprogs-$(CONFIG_LOGO) += pnmtologo
hostprogs-$(CONFIG_VT) += conmakehash