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Unlike GNU ld, which can be instructed to emit symbol based static relocations into fully linked binaries using the --emit-relocs command line switch, the RVCT armlink tool can only emit dynamic relocations into the PT_DYNAMIC segment. This has two consequences . we can only identify absolute relocations, so there is no way to fix up relative relocations between sections, or check their validity in the PE/COFF layout . the r_offset fields of the PT_DYNAMIC DT_REL entries are relative either to the base of the image or to any of its segments but *not* to the base of the input section that contains the location they refer to, and converting them to PE/COFF image offsets is non-trivial unless the sections are laid out in the same way in the ELF and PE/COFF versions of the binary. There is really only one way to deal with this, and that is to require that the ELF and PE/COFF versions of the binary are identical in memory. So enforce that in the code. Also, fix the utterly broken relocation fixup code that dereferences ELF32_R_SYM(r_info) both as a 1-based program header index and a 0-based section header index. If this code ever produced working binaries, it was purely by chance. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19236 6f19259b-4bc3-4df7-8a09-765794883524
This directory contains the next generation of EDK II build tools and template files. Templates are located in the Conf directory, while the tools executables for Microsoft Windows 32-bit Operating Systems are located in the Bin\Win32 directory, other directory contatins tools source. 1. Build step to generate the binary tools. === Windows/Visual Studio Notes === To build the BaseTools, you should run the standard vsvars32.bat script. In addition to this, you should set the following environment variables: * EDK_TOOLS_PATH - Path to the BaseTools sub directory under the edk2 tree * BASE_TOOLS_PATH - The directory where the BaseTools source is located. (It is the same directory where this README.txt is located.) * PYTHON_FREEZER_PATH - Path to where the python freezer tool is installed After this, you can run the toolsetup.bat file, which is in the same directory as this file. It should setup the remainder of the environment, and build the tools if necessary. Please also refer to the 'BuildNotes.txt' file for more information on building under Windows. === Unix-like operating systems === To build on Unix-like operating systems, you only need to type 'make' in the base directory of the project. === Ubuntu Notes === On Ubuntu, the following command should install all the necessary build packages to build all the C BaseTools: sudo apt-get install build-essential uuid-dev === Python sqlite3 module === On Windows, the cx_freeze will not copy the sqlite3.dll to the frozen binary directory (the same directory as build.exe and GenFds.exe). Please copy it manually from <PythonHome>\DLLs. The Python distributed with most recent Linux will have sqlite3 module built in. If not, please install sqlit3 package separately. 26-OCT-2011