[commit: ghc] master: Adds aarch64 linker for mach-o files. (e8a2741)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/e8a27410d0e51062422cb4782913bbbdf9deea74/ghc

>---------------------------------------------------------------

commit e8a27410d0e51062422cb4782913bbbdf9deea74
Author: Moritz Angermann <moritz.angermann at gmail.com>
Date:   Tue Mar 21 11:02:20 2017 -0400

    Adds aarch64 linker for mach-o files.
    
    This is the final commit that ties them all together. Here we
    add the aarch64 linker for macho files.
    
    - In D3238 we started allowing preloading object code with mmap
      in iOS, where we can't have r+w+x.
    - In D3239 we introduced a richer extension of the object code
      data type to make working with mach-o files easier.
    - In D3240 we set the stage to allow loading archives (.a) on iOS
    - In D3251 we added init and deinit functions to populate and
      depopulate the enriched object code data structure for mach-o
      files.
    - In D3252 we refactored most of the MachO.c file to use the
      new types and datastructure.
    
    This commit will than finally add the aarch64 (arm64) linker
    for mach-o files to ghc, using the improved foundation we
    have constructed above.
    
    The dependency structure therefore is as follows
    
    ```
      .- D3240
      v
    This <- D3252 <- D3251 <- D3239
      ^
      '- D3238
    ```
    
    Depends: D3252, D3240, D3238
    
    Test Plan:
    To test this with iOS, we also need the remote-iserv
    diff D3233. With all that in place, proceed as follows:
    
    - Build ghc for the host
    
    ```
      ghc $ ./configure --prefix=/test/opt \
        --disable-large-address-space \
        --with-llc=/path/to/llvm-3.9/bin/llc \
        --with-opt=/path/to/llvm-3.9/bin/opt
      # edit mk/build.mk to specify quick
      ghc $ make && make install
    ```
    
    - Build ghc for ios
    
    ```
      ghc $ ./configure --target=aarch64-apple-darwin14 \
        --prefix=/test/opt \
        --disable-large-address-space \
        --with-llc=/path/to/llvm-3.9/bin/llc \
        --with-opt=/path/to/llvm-3.9/bin/opt \
        --with-ghc=/test/bin/ghc \
        --enable-bootstrap-with-devel-snapshot
      # edit mk/build.mk to specify quick-cross
      ghc $ make && make install
    
    ```
    - Obtain the iOS wrapper scripts from
    https://github.com/angerman/ghc-ios-scripts
      and place them in PATH.
    
    - Build iserv-proxy for the host
    
    ```
      ghc/iserv $ cabal install -fproxy -flibrary
    
    ```
    - Build iserv-library for the target
    
    ```
      # build cryptonite without integer-gmp
      ghc/iserv $ aarch64-apple-darwin14-cabal install cryptonite
    -f-integer-gmp
      ghc/iserv $ aarch64-apple-darwin14-cabal install -flibrary
    ```
    
    - Create an iOS application with the following `main.m`:
    ```
      #import <UIKit/UIKit.h>
      #include "HsFFI.h"
      extern void startSlave(bool, int, const char *);
    
      int main(int argc, char * argv[]) {
        const char * documents_path = [[[NSFileManager defaultManager]
    URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask]
    firstObject].path.UTF8String;
    
        hs_init(NULL, NULL);
    
        startSlave(false, 5000, documents_path);
    
        @autoreleasepool {
            return UIApplicationMain(argc, argv, nil, nil);
        }
      }
    ```
    
      and link it with: the iserv archive from
    `~/.cabal/lib/aarch64-ios-ghc`
      as well as all dependent archives.
    
    - Build, Install and Launch the iserv-slave application on your iphone
    
    - Compile some Template Haskell code with the
    `aarch64-apple-darwin14-ghc`,
      through the `iserv-proxy`
    
    ```
      app $ aarch64-apple-darwin14-ghc Module.hs \
       -threaded -staticlib \
       -outputdir build/aarch64 -pgmlibtool libtool-quiet -stubdir . \
       -fexternal-interpreter \
       -pgmi=$HOME/.cabal/bin/iserv-proxy \
       -opti10.0.0.1 \
       -opti5000
    ```
      where 10.0.0.1 is the ip of your iserv-slave.
    
      magic.
    
    Reviewers: rwbarton, bgamari, austin, hvr, erikd, simonmar
    
    Subscribers: thomie, erikd, ryantrinkle
    
    Differential Revision: https://phabricator.haskell.org/D3255


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e8a27410d0e51062422cb4782913bbbdf9deea74
 configure.ac       |   2 +-
 rts/linker/MachO.c | 748 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 722 insertions(+), 28 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc e8a27410d0e51062422cb4782913bbbdf9deea74