diff options
Diffstat (limited to 'dev/ports/core-linux-eglibc')
| -rw-r--r-- | dev/ports/core-linux-eglibc/bootstrap.mdwn | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/dev/ports/core-linux-eglibc/bootstrap.mdwn b/dev/ports/core-linux-eglibc/bootstrap.mdwn new file mode 100644 index 0000000..a9d0171 --- /dev/null +++ b/dev/ports/core-linux-eglibc/bootstrap.mdwn @@ -0,0 +1,187 @@ +[[!meta title="core-linux-eglibc Port Bootstrap"]] + +`core-linux-eglibc` is the first architecture port of ProteanOS 1.0. +([[ProteanOS_0.x|/dev/releases/0]] had a `cortexa8-linux-eglibc` architecture, +but `core-linux-eglibc` is being built from scratch.) + +This port is being bootstrapped from a Debian GNU/Linux system. + +Operating systems are often bootstrapped with GCC by building a cross compiling +GCC with a sysroot then using that to build the system. This port is instead +being bootstrapped natively in two stages. This is possible because care is +taken to ensure that the resulting ELF binaries are compatible with the +ProteanOS ABI (including the value of the ELF INTERP field and the file system +hierarchy). + +The first stage involves building base system and toolchain packages and +unpacking them into a bootstrap system directory. + +The second stage involves changing the file system root (with **chroot**(8)) to +the bootstrap directory and building source packages. + + +Stage 1 +======= + +These instructions are tested on a Debian wheezy amd64 GNU/Linux system. + +The following directory structure is assumed: + + <work-root>/ + +- bootstrap_core-linux-eglibc/ + +- etc/ + +- lib/ + +- [...] + +- pkg/ + +- binutils/ + +- eglibc/ + +- gcc-4.7/ + +- [...] + +- zlib/ + +Preparation +----------- + +Build and install [opkbuild 3.0.0-alpha4][opkbuild-3.0.0-alpha4] and +[opkhelper 3.0.0-beta2][opkhelper-3.0.0-beta2]. + +The build system needs to be made to look a little more like ProteanOS. + +To install `/etc/proteanos_arch` and `/etc/proteanos_plat` files on the build +system for **opkbuild**(1), run opkbuild's `mksysconf` makefile with `ARCH` and +`PLAT` macros, e.g.: + + # ./mksysconf ARCH=core-linux-eglibc PLAT=dev + +The `gcc-4.7` package will look for a symbolic link to the ELF interpreter +(dynamic linker) at `/usr/lib/core-linux-eglibc/ld.so`. + + # mkdir /lib/core-linux-eglibc /usr/lib/core-linux-eglibc + # ln -sf /lib64/ld-linux-x86-64.so.2 /lib/core-linux-eglibc/ld-linux-x86-64.so.2 + # ln -sf /lib/core-linux-eglibc/ld-linux-x86-64.so.2 /usr/lib/core-linux-eglibc/ld.so + +Make a directory for the bootstrap ProteanOS system. + + $ mkdir bootstrap_core-linux-eglibc + +ProteanOS's ELF interpreter is not installed in the location described in the +ELF INTERP field of binaries built with the build system's GCC. Make a symbolic +link in the bootstrap system directory to direct Linux to the correct location +when it executes the stage 1 binaries. + + $ mkdir bootstrap_core-linux-eglibc/lib64 + $ ln -sf /lib/core-linux-eglibc/ld-linux-x86-64.so.2 bootstrap_core-linux-eglibc/lib64/ld-linux-x86-64.so.2 + +[opkbuild-3.0.0-alpha4]: http://files.proteanos.com/pub/opkbuild/3.0.0-alpha4/ +[opkhelper-3.0.0-beta2]: http://lists.proteanos.com/proteanos-dev/2013/05/msg00001.html + +Building EGLIBC +--------------- + +Run the following commands in a copy of the `eglibc` source package to build +EGLIBC for the bootstrap system. + + $ opkbuild -b -c + +Building zlib +------------- + +Run the following commands in a copy of the `zlib` source package to build zlib +for the bootstrap system. + + $ opkbuild -b -c + +Building, Installing, and Testing GNU Binutils +---------------------------------------------- + +Run the following commands in a copy of the `binutils` source package to build +GNU Binutils for the bootstrap system. + + $ ./config clean + $ PKG_TARGETS='core-linux-eglibc' ./config + $ opkbuild -b -c + +Run the following commands in the bootstrap system directory to unpack the +`binutils` packages and their dependencies: + + $ tar -xzOf ../pkg/libc.6_2.17~r22751+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libz.1_1.2.7+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/binutils-common_2.22-1_all_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/binutils-core-linux-eglibc_2.22-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + +Now test some Binutils programs. + + # chroot . as --version + GNU assembler (GNU Binutils for ProteanOS) 2.22 + Copyright 2011 Free Software Foundation, Inc. + This program is free software; you may redistribute it under the terms of + the GNU General Public License version 3 or later. + This program has absolutely no warranty. + This assembler was configured for a target of `x86_64-unknown-linux-gnu'. + # chroot . readelf -hl /usr/bin/readelf + [...] + # chroot . objdump -p /usr/bin/objdump + [...] + +Building the Multiple Precision Libraries +----------------------------------------- + +TODO. + +Building, Installing, and Testing GCC +------------------------------------- + +Run the following commands in a copy of the `gcc-4.7` source package to build +GCC for the bootstrap system. + + $ ./config clean + $ PKG_TARGETS='core-linux-eglibc' ./config + $ opkbuild -b -c + +Run the following commands in the bootstrap system directory to unpack the +`gcc-4.7` packages and their dependencies. + + $ tar -xzOf ../pkg/libc.6-dev_2.17~r22751+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libgcc.1_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libgomp.1_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libitm.1_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libgmp.10_5.0.5-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libmpc.3_1.0.1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/libmpfr.4_3.1.1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/cpp-4.7-core-linux-eglibc_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/gcc-4.7-common_4.7.3+sip1-1_all_all.opk data.tar.gz | tar -xz + $ tar -xzOf ../pkg/gcc-4.7-core-linux-eglibc_4.7.3+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + +Now try compiling, linking, and running an example program (the `fitblk.c` +example from zlib). + + $ tar -xzOf ../pkg/libz.1-dev_1.2.7+sip1-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + $ cp ../pkg/zlib/tmp/src/examples/fitblk.c . + # chroot . core-linux-eglibc-gcc-4.7 -lz -o /fitblk /fitblk.c + # chroot . /fitblk + fitblk abort: need one argument: size of output block + +Building and Installing GNU Make +-------------------------------- + +Run the following commands in a copy of the `gmake` source package to build GNU +Make for the bootstrap system. + + $ LDFLAGS='-Wl,--dynamic-linker=/lib/core-linux-eglibc/ld-linux-x86-64.so.2' opkbuild -b -c + +Run the following commands in the bootstrap system directory to unpack the +`gmake` package: + + $ tar -xzOf ../pkg/gmake_3.82-1_core-linux-eglibc_all.opk data.tar.gz | tar -xz + +TODO +---- + +To be built and installed are busybox, linux-libre (headers), gcc-defaults, +opkbuild, opkhelper-3.0, and opkhelper-data. + + +Stage 2 +======= + +TODO. |