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| author | Zejun Wu <watashi@fb.com> | 2018-12-28 20:37:13 -0800 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2019-01-30 10:06:32 -0500 |
| commit | e29b1ee72d77d5a06ac949f9dcc80108243a25c0 (patch) | |
| tree | 3c2104b52c52d77b130c98d3cd486eb47ed2f347 /libraries | |
| parent | 4bf35da4fccd2a21153a1c19bfa80006e99e02a1 (diff) | |
| download | haskell-e29b1ee72d77d5a06ac949f9dcc80108243a25c0.tar.gz | |
Add a RTS option -xp to load PIC object anywhere in address space
Summary:
This re-applies {D5195} with fixes for i386:
* Fix unused label warnings, see {D5230} or {D5273}
* Fix a silly bug introduced by moving `#if`
{P190}
Add a RTS option -xp to load PIC object anywhere in address space. We do
this by relaxing the requirement of <0x80000000 result of
`mmapForLinker` and implying USE_CONTIGUOUS_MMAP.
We also need to change calls to `ocInit` and `ocGetNames` to avoid
dangling pointers when the address of `oc->image` is changed by
`ocAllocateSymbolExtra`.
Test Plan:
See {D5195}, also test under i386:
```
$ uname -a
Linux watashi-arch32 4.18.5-arch1-1.0-ARCH #1 SMP PREEMPT Tue Aug 28
20:45:30 CEST 2018 i686 GNU/Linux
$ cd testsuite/tests/th/ && make test
...
```
will run `./validate` on stacked diff.
Reviewers: simonmar, bgamari, alpmestan, trommler, hvr, erikd
Reviewed By: simonmar
Subscribers: rwbarton, carter
Differential Revision: https://phabricator.haskell.org/D5289
Diffstat (limited to 'libraries')
| -rw-r--r-- | libraries/base/GHC/RTS/Flags.hsc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libraries/base/GHC/RTS/Flags.hsc b/libraries/base/GHC/RTS/Flags.hsc index 12cb828e6a..249bcd5a98 100644 --- a/libraries/base/GHC/RTS/Flags.hsc +++ b/libraries/base/GHC/RTS/Flags.hsc @@ -139,6 +139,7 @@ data MiscFlags = MiscFlags , generateStackTrace :: Bool , machineReadable :: Bool , internalCounters :: Bool + , linkerAlwaysPic :: Bool , linkerMemBase :: Word -- ^ address to ask the OS for memory for the linker, 0 ==> off } deriving ( Show -- ^ @since 4.8.0.0 @@ -444,6 +445,8 @@ getMiscFlags = do (#{peek MISC_FLAGS, machineReadable} ptr :: IO CBool)) <*> (toBool <$> (#{peek MISC_FLAGS, internalCounters} ptr :: IO CBool)) + <*> (toBool <$> + (#{peek MISC_FLAGS, linkerAlwaysPic} ptr :: IO CBool)) <*> #{peek MISC_FLAGS, linkerMemBase} ptr getDebugFlags :: IO DebugFlags |