1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
{-# LANGUAGE ScopedTypeVariables #-}
-- | Platform description
module GHC.Platform
( Platform (..)
, PlatformWordSize(..)
, PlatformConstants(..)
, platformArch
, platformOS
, ArchOS(..)
, Arch(..)
, OS(..)
, ArmISA(..)
, ArmISAExt(..)
, ArmABI(..)
, PPC_64ABI(..)
, ByteOrder(..)
, target32Bit
, isARM
, osElfTarget
, osMachOTarget
, osSubsectionsViaSymbols
, platformUsesFrameworks
, platformWordSizeInBytes
, platformWordSizeInBits
, platformMinInt
, platformMaxInt
, platformMaxWord
, platformInIntRange
, platformInWordRange
, PlatformMisc(..)
, SseVersion (..)
, BmiVersion (..)
-- * Shared libraries
, platformSOName
, platformHsSOName
, platformSOExt
)
where
import Prelude -- See Note [Why do we import Prelude here?]
import GHC.Read
import GHC.ByteOrder (ByteOrder(..))
import GHC.Platform.Constants
import GHC.Platform.ArchOS
import Data.Word
import Data.Int
import System.FilePath
-- | Platform description
--
-- This is used to describe platforms so that we can generate code for them.
data Platform = Platform
{ platformArchOS :: !ArchOS -- ^ Architecture and OS
, platformWordSize :: !PlatformWordSize -- ^ Word size
, platformByteOrder :: !ByteOrder -- ^ Byte order (endianness)
, platformUnregisterised :: !Bool
, platformHasGnuNonexecStack :: !Bool
, platformHasIdentDirective :: !Bool
, platformHasSubsectionsViaSymbols :: !Bool
, platformIsCrossCompiling :: !Bool
, platformLeadingUnderscore :: !Bool -- ^ Symbols need underscore prefix
, platformTablesNextToCode :: !Bool
-- ^ Determines whether we will be compiling info tables that reside just
-- before the entry code, or with an indirection to the entry code. See
-- TABLES_NEXT_TO_CODE in includes/rts/storage/InfoTables.h.
, platformConstants :: !PlatformConstants
-- ^ Constants such as structure offsets, type sizes, etc.
}
deriving (Read, Show, Eq)
data PlatformWordSize
= PW4 -- ^ A 32-bit platform
| PW8 -- ^ A 64-bit platform
deriving (Eq)
instance Show PlatformWordSize where
show PW4 = "4"
show PW8 = "8"
instance Read PlatformWordSize where
readPrec = do
i :: Int <- readPrec
case i of
4 -> return PW4
8 -> return PW8
other -> fail ("Invalid PlatformWordSize: " ++ show other)
platformWordSizeInBytes :: Platform -> Int
platformWordSizeInBytes p =
case platformWordSize p of
PW4 -> 4
PW8 -> 8
platformWordSizeInBits :: Platform -> Int
platformWordSizeInBits p = platformWordSizeInBytes p * 8
-- | Platform architecture
platformArch :: Platform -> Arch
platformArch platform = case platformArchOS platform of
ArchOS arch _ -> arch
-- | Platform OS
platformOS :: Platform -> OS
platformOS platform = case platformArchOS platform of
ArchOS _ os -> os
isARM :: Arch -> Bool
isARM (ArchARM {}) = True
isARM ArchARM64 = True
isARM _ = False
-- | This predicate tells us whether the platform is 32-bit.
target32Bit :: Platform -> Bool
target32Bit p =
case platformWordSize p of
PW4 -> True
PW8 -> False
-- | This predicate tells us whether the OS supports ELF-like shared libraries.
osElfTarget :: OS -> Bool
osElfTarget OSLinux = True
osElfTarget OSFreeBSD = True
osElfTarget OSDragonFly = True
osElfTarget OSOpenBSD = True
osElfTarget OSNetBSD = True
osElfTarget OSSolaris2 = True
osElfTarget OSDarwin = False
osElfTarget OSMinGW32 = False
osElfTarget OSKFreeBSD = True
osElfTarget OSHaiku = True
osElfTarget OSQNXNTO = False
osElfTarget OSAIX = False
osElfTarget OSHurd = True
osElfTarget OSUnknown = False
-- Defaulting to False is safe; it means don't rely on any
-- ELF-specific functionality. It is important to have a default for
-- portability, otherwise we have to answer this question for every
-- new platform we compile on (even unreg).
-- | This predicate tells us whether the OS support Mach-O shared libraries.
osMachOTarget :: OS -> Bool
osMachOTarget OSDarwin = True
osMachOTarget _ = False
osUsesFrameworks :: OS -> Bool
osUsesFrameworks OSDarwin = True
osUsesFrameworks _ = False
platformUsesFrameworks :: Platform -> Bool
platformUsesFrameworks = osUsesFrameworks . platformOS
osSubsectionsViaSymbols :: OS -> Bool
osSubsectionsViaSymbols OSDarwin = True
osSubsectionsViaSymbols _ = False
-- | Minimum representable Int value for the given platform
platformMinInt :: Platform -> Integer
platformMinInt p = case platformWordSize p of
PW4 -> toInteger (minBound :: Int32)
PW8 -> toInteger (minBound :: Int64)
-- | Maximum representable Int value for the given platform
platformMaxInt :: Platform -> Integer
platformMaxInt p = case platformWordSize p of
PW4 -> toInteger (maxBound :: Int32)
PW8 -> toInteger (maxBound :: Int64)
-- | Maximum representable Word value for the given platform
platformMaxWord :: Platform -> Integer
platformMaxWord p = case platformWordSize p of
PW4 -> toInteger (maxBound :: Word32)
PW8 -> toInteger (maxBound :: Word64)
-- | Test if the given Integer is representable with a platform Int
platformInIntRange :: Platform -> Integer -> Bool
platformInIntRange platform x = x >= platformMinInt platform && x <= platformMaxInt platform
-- | Test if the given Integer is representable with a platform Word
platformInWordRange :: Platform -> Integer -> Bool
platformInWordRange platform x = x >= 0 && x <= platformMaxWord platform
--------------------------------------------------
-- Instruction sets
--------------------------------------------------
-- | x86 SSE instructions
data SseVersion
= SSE1
| SSE2
| SSE3
| SSE4
| SSE42
deriving (Eq, Ord)
-- | x86 BMI (bit manipulation) instructions
data BmiVersion
= BMI1
| BMI2
deriving (Eq, Ord)
-- | Platform-specific settings formerly hard-coded in Config.hs.
--
-- These should probably be all be triaged whether they can be computed from
-- other settings or belong in another another place (like 'Platform' above).
data PlatformMisc = PlatformMisc
{ -- TODO Recalculate string from richer info?
platformMisc_targetPlatformString :: String
, platformMisc_ghcWithInterpreter :: Bool
, platformMisc_ghcWithSMP :: Bool
, platformMisc_ghcRTSWays :: String
, platformMisc_libFFI :: Bool
, platformMisc_ghcRtsWithLibdw :: Bool
, platformMisc_llvmTarget :: String
}
platformSOName :: Platform -> FilePath -> FilePath
platformSOName platform root = case platformOS platform of
OSMinGW32 -> root <.> platformSOExt platform
_ -> ("lib" ++ root) <.> platformSOExt platform
platformHsSOName :: Platform -> FilePath -> FilePath
platformHsSOName platform root = ("lib" ++ root) <.> platformSOExt platform
platformSOExt :: Platform -> FilePath
platformSOExt platform
= case platformOS platform of
OSDarwin -> "dylib"
OSMinGW32 -> "dll"
_ -> "so"
|
