From 6520fe5564acf07ade7b18a1272db1184835c487 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Tue, 8 May 2012 21:22:24 +0300 Subject: 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 Link: http://lkml.kernel.org/r/1336501366-28617-2-git-send-email-jarkko.sakkinen@intel.com Signed-off-by: Jarkko Sakkinen Signed-off-by: H. Peter Anvin Cc: --- Makefile | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index 48bd1f50dcc..db2bcf3d66b 100644 --- a/Makefile +++ b/Makefile @@ -442,7 +442,7 @@ asm-generic: no-dot-config-targets := clean mrproper distclean \ cscope gtags TAGS tags help %docs check% coccicheck \ - include/linux/version.h headers_% archheaders \ + include/linux/version.h headers_% archheaders archscripts \ kernelversion %src-pkg config-targets := 0 @@ -979,7 +979,7 @@ prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ include/config/auto.conf $(cmd_crmodverdir) -archprepare: archheaders prepare1 scripts_basic +archprepare: archheaders archscripts prepare1 scripts_basic prepare0: archprepare FORCE $(Q)$(MAKE) $(build)=. @@ -1049,8 +1049,11 @@ hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) PHONY += archheaders archheaders: +PHONY += archscripts +archscripts: + PHONY += __headers -__headers: include/linux/version.h scripts_basic asm-generic archheaders FORCE +__headers: include/linux/version.h scripts_basic asm-generic archheaders archscripts FORCE $(Q)$(MAKE) $(build)=scripts build_unifdef PHONY += headers_install_all -- cgit v1.2.3