# Maintainer: André Silva <emulatorman@hyperbola.info>

## FIXME: Try let GCC use intel syntax by enabling it in inline Assembly
##        to build Shell/Library/IA32/math.c or port all code to AT&T syntax.
##        For now, x86_64 (IA32 SHELL support) and i686 are disabled
##        https://wiki.osdev.org/Inline_assembly#Intel_Syntax

## "1" to enable IA32 SHELL build in x86_64, "0" to disable
_SHELL_IA32_X64=0

###############
[[ $CARCH == x86_64 ]] && _TIANO_ARCH=X64
[[ $CARCH == i686 ]] && _TIANO_ARCH=IA32

[[ $CARCH == x86_64 ]] && _TIANO_S_ARCH=x64
[[ $CARCH == i686 ]] && _TIANO_S_ARCH=ia32
###############

pkgname=edk2-uefi-shell-v1
pkgver=2017
pkgrel=1.backports1
pkgdesc="UEFI Shell v1 from Tianocore EDK2"
url='https://github.com/tianocore/edk2'
#arch=(x86_64 i686)
arch=(x86_64)
license=(Simplified-BSD)
makedepends=(python2 nasm gnu-efi-libs subversion)
options=(!strip !makeflags)
install=$pkgname.install
source=(https://github.com/tianocore/edk2/archive/vUDK$pkgver.tar.gz
        svn+https://svn.code.sf.net/p/efi-shell/code/trunk/Shell
        let-gcc-use-intel-syntax-in-inline-assembly.patch)
sha512sums=('d941a661d570b0f69962105920b3524c4aac1f4883468914305eb68015148d70f6593c52872a79a6143cf87dc44e9ce2b8957834b4524cb8a04b12473c6d7d81'
            'SKIP'
            'b224b3eae4b6cd89dd823b513f2022d1224ba470b7f6ec2f799de614fd33edf8c687c757a762bb313b1b65cdd690d6757762ada59425425ce99d5619150da468')

prepare() {
  cd $srcdir/edk2-vUDK$pkgver

  msg "Cleanup UDK config files"
  rm -rf Build
  rm -rf Conf
  mkdir -p Conf
  mkdir -p Build

  msg "Delete bogus dependency files"
  find . -name '*.d' -delete

  msg "Disable build ID generation"
  sed -i 's|,--gc-sections|,--gc-sections,--build-id=none|g' BaseTools/Conf/tools_def.template

  msg "Use python2 for UDK BaseTools"
  sed -i 's|python |python2 |g' BaseTools/BinWrappers/PosixLike/*
  sed -i 's|python |python2 |g' BaseTools/Tests/GNUmakefile

  msg "Fix GCC Warning as error"
  sed -i 's|-Werror |-Wno-error -Wno-unused-but-set-variable |g' BaseTools/Source/C/Makefiles/header.makefile
  sed -i 's|-Werror |-Wno-error -Wno-unused-but-set-variable |g' BaseTools/Conf/tools_def.template

  if [[ $CARCH == x86_64 ]] && [[ $_SHELL_IA32_X64 == 1 ]] || [[ $CARCH == i686 ]]; then
    msg "Add command-line option -masm=intel to globally trigger Intel syntax"
    sed -i 's|-Wno-unused-but-set-variable |-Wno-unused-but-set-variable -masm=intel |g' BaseTools/Source/C/Makefiles/header.makefile
    sed -i 's|-Wno-unused-but-set-variable |-Wno-unused-but-set-variable -masm=intel |g' BaseTools/Conf/tools_def.template
  fi

  msg "Remove GCC -g debug option and add -O0 -mabi=ms -maccumulate-outgoing-args"
  sed -i 's|DEFINE GCC_ALL_CC_FLAGS            = -g |DEFINE GCC_ALL_CC_FLAGS            = -O0 -mabi=ms -maccumulate-outgoing-args |g' BaseTools/Conf/tools_def.template
  sed -i 's|DEFINE GCC44_ALL_CC_FLAGS            = -g |DEFINE GCC44_ALL_CC_FLAGS            = -O0 -mabi=ms -maccumulate-outgoing-args |g' BaseTools/Conf/tools_def.template

  msg "Fix UDK Target Platform"
  sed -i 's|ACTIVE_PLATFORM       = Nt32Pkg/Nt32Pkg.dsc|ACTIVE_PLATFORM       = EdkShellPkg/EdkShellPkg.dsc|g' BaseTools/Conf/target.template
  sed -i 's|TARGET                = DEBUG|TARGET                = RELEASE|g' BaseTools/Conf/target.template
  sed -i 's|TOOL_CHAIN_TAG        = MYTOOLS|TOOL_CHAIN_TAG        = GCC5|g' BaseTools/Conf/target.template
  sed -i 's|IA32|X64|g' BaseTools/Conf/target.template

  chmod 0755 BaseTools/BuildEnv

  msg "Move Shell directory to the main source"
  mv ../Shell .

  msg "Apply EDK Shell patch to support GCC"
  cd Shell
  patch -p1 -i ../EdkShellPkg/ShellR64.patch

  if [[ $CARCH == x86_64 ]] && [[ $_SHELL_IA32_X64 == 1 ]] || [[ $CARCH == i686 ]]; then
    msg "Let GCC use Intel syntax in inline Assembly"
    patch -p1 -i $srcdir/let-gcc-use-intel-syntax-in-inline-assembly.patch
  fi

  msg "Fix efilibplat.h path"
  if [[ $CARCH == x86_64 ]]; then
    sed -i 's|efilibplat.h|efi/x86_64/efilibplat.h|g' Library/EfiShellLib.h
    sed -i 's|#define RFC_3066_ENTRY_SIZE   12|#define RFC_3066_ENTRY_SIZE   12\n\n#define MIN_ALIGNMENT_SIZE  8|' Library/EfiShellLib.h
  elif [[ $CARCH == i686 ]]; then
    sed -i 's|efilibplat.h|efi/ia32/efilibplat.h|g' Library/EfiShellLib.h
    sed -i 's|#define RFC_3066_ENTRY_SIZE   12|#define RFC_3066_ENTRY_SIZE   12\n\n#define MIN_ALIGNMENT_SIZE  4|' Library/EfiShellLib.h
  fi
}

build() {
  cd $srcdir/edk2-vUDK$pkgver

  msg "Unset all compiler FLAGS"
  unset CFLAGS
  unset CPPFLAGS
  unset CXXFLAGS
  unset LDFLAGS
  unset MAKEFLAGS

  msg "Setup UDK Environment"
  source $srcdir/edk2-vUDK$pkgver/BaseTools/BuildEnv BaseTools
  echo

  msg "Compile UDK BaseTools"
  make -C BaseTools
  echo

  msg "Unset all compiler FLAGS"
  unset CFLAGS
  unset CPPFLAGS
  unset CXXFLAGS
  unset LDFLAGS
  unset MAKEFLAGS

  msg "Compile UEFI Shell v1 ${_TIANO_ARCH} binary"
  BaseTools/BinWrappers/PosixLike/build -p EdkShellPkg/EdkShellPkg.dsc -a ${_TIANO_ARCH} -b RELEASE -t GCC5 -m Shell/Shell.inf
  echo

  if [[ $CARCH == x86_64 ]] && [[ $_SHELL_IA32_X64 == 1 ]]; then
    msg "Unset all compiler FLAGS"
    unset CFLAGS
    unset CPPFLAGS
    unset CXXFLAGS
    unset LDFLAGS
    unset MAKEFLAGS

    msg "Compile UEFI Shell v1 IA32 binary"
    sed -i 's|#define MIN_ALIGNMENT_SIZE  8|#define MIN_ALIGNMENT_SIZE  4|' Shell/Library/EfiShellLib.h
    BaseTools/BinWrappers/PosixLike/build -p EdkShellPkg/EdkShellPkg.dsc -a IA32 -b RELEASE -t GCC5 -m Shell/Shell.inf
    echo
  fi
}

package() {
  msg "Install the UEFI Shell v1 ${_TIANO_ARCH} binary"
  install -d $pkgdir/usr/share/uefi-shell
  install -D -m0644 $srcdir/edk2-vUDK$pkgver/Build/EdkShellPkg/RELEASE_GCC5/${_TIANO_ARCH}/Shell.efi $pkgdir/usr/share/uefi-shell/shell${_TIANO_S_ARCH}_v1.efi

  if [[ $CARCH == x86_64 ]] && [[ $_SHELL_IA32_X64 == 1 ]]; then
    msg "Install the UEFI Shell v1 IA32 binary"
    install -d $pkgdir/usr/share/uefi-shell
    install -Dm0644 $srcdir/edk2-vUDK$pkgver/Build/EdkShellPkg/RELEASE_GCC5/IA32/Shell.efi $pkgdir/usr/share/uefi-shell/shellia32_v1.efi
  fi

  msg "Install license"
  install -Dm644 $srcdir/edk2-vUDK$pkgver/EdkShellPkg/License.txt $pkgdir/usr/share/licenses/$pkgname/License.txt
}