Compiler for Windows NT PowerPC

This is a fork of Retro68's GCC 9.1, heavily modified to emit asm that the official NTPPC assembler PAS.EXE (aka cross-assembler PASM.EXE as included in old VC6-era Windows CE 2.x for PowerPC toolchain) can build. Combine with VC++4.x's linker (any later will not work) to make a full toolchain.

Known bugs

• -O2 and higher is broken, without disabling problematic optimisations: at least -fno-align-functions -fno-align-labels -fno-align-jumps -fno-align-loops
• No SEH support
• Function prologues + epilogues / stack frames are technically not correct for PPC NT, this only really causes issues with some exceptions in kernel mode leading to PANIC_STACK_SWITCH bugcheck (instead of the correct one) due to exception handling related code in NT itself raising an exception
• C++ support is completely untested.
• No libgcc, if you need math related functions from there use arith64.c (or manually use Rtl* functions from ntdll/etc)

There may be other issues.

Building

git clone https://github.com/Wack0/peppc
mkdir peppc-build
mkdir peppc-build/gcc-build
mkdir peppc-build/toolchain
cd peppc-build/gcc-build
../../peppc/configure --target=powerpcle-pe-winnt --prefix=$PWD/../toolchain --enable-languages=c,c++ --disable-libssp --disable-lto --src=../../peppc MAKEINFO=missing
make # add -j as appropriate
# libgcc build will fail, this is expected.
cd gcc
make install

Usage

Compile, assemble, link like so:

powerpcle-pe-winnt-gcc -S -O1 -o - file.c | powerpcle-pe-winnt-cpp - -P -w -o file.asm # add compiler switches as appropriate
pasm.exe -o file.obj file.asm # ran through wine if needed
link.exe /OUT:file.exe file.obj libs... # ran through wine if needed