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
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
|
# The Nixpkgs CC is not directly usable, since it doesn't know where
# the C library and standard header files are. Therefore the compiler
# produced by that package cannot be installed directly in a user
# environment and used from the command line. So we use a wrapper
# script that sets up the right environment variables so that the
# compiler and the linker just "work".
{ name ? ""
, lib
, stdenvNoCC
, runtimeShell
, bintools ? null, libc ? null, coreutils ? null, gnugrep ? null
, netbsd ? null, netbsdCross ? null
, sharedLibraryLoader ?
if libc == null then
null
else if stdenvNoCC.targetPlatform.isNetBSD then
if !(targetPackages ? netbsdCross) then
netbsd.ld_elf_so
else if libc != targetPackages.netbsdCross.headers then
targetPackages.netbsdCross.ld_elf_so
else
null
else
lib.getLib libc
, nativeTools, noLibc ? false, nativeLibc, nativePrefix ? ""
, propagateDoc ? bintools != null && bintools ? man
, extraPackages ? [], extraBuildCommands ? ""
, isGNU ? bintools.isGNU or false
, isLLVM ? bintools.isLLVM or false
, isCCTools ? bintools.isCCTools or false
, expand-response-params
, targetPackages ? {}
, useMacosReexportHack ? false
, wrapGas ? false
# Note: the hardening flags are part of the bintools-wrapper, rather than
# the cc-wrapper, because a few of them are handled by the linker.
, defaultHardeningFlags ? [
"bindnow"
"format"
"fortify"
"fortify3"
"pic"
"relro"
"stackprotector"
"strictoverflow"
] ++ lib.optional (with stdenvNoCC;
# Musl-based platforms will keep "pie", other platforms will not.
# If you change this, make sure to update section `{#sec-hardening-in-nixpkgs}`
# in the nixpkgs manual to inform users about the defaults.
targetPlatform.libc == "musl"
# Except when:
# - static aarch64, where compilation works, but produces segfaulting dynamically linked binaries.
# - static armv7l, where compilation fails.
&& !(targetPlatform.isAarch && targetPlatform.isStatic)
) "pie"
# Darwin code signing support utilities
, postLinkSignHook ? null, signingUtils ? null
}:
assert propagateDoc -> bintools ? man;
assert nativeTools -> !propagateDoc && nativePrefix != "";
assert !nativeTools -> bintools != null && coreutils != null && gnugrep != null;
assert !(nativeLibc && noLibc);
assert (noLibc || nativeLibc) == (libc == null);
let
inherit (lib)
attrByPath
concatStringsSep
getBin
getDev
getLib
getName
getVersion
hasSuffix
optional
optionalAttrs
optionals
optionalString
platforms
removePrefix
replaceStrings
;
inherit (stdenvNoCC) hostPlatform targetPlatform;
# Prefix for binaries. Customarily ends with a dash separator.
#
# TODO(@Ericson2314) Make unconditional, or optional but always true by
# default.
targetPrefix = optionalString (targetPlatform != hostPlatform)
(targetPlatform.config + "-");
bintoolsVersion = getVersion bintools;
bintoolsName = removePrefix targetPrefix (getName bintools);
libc_bin = optionalString (libc != null) (getBin libc);
libc_dev = optionalString (libc != null) (getDev libc);
libc_lib = optionalString (libc != null) (getLib libc);
bintools_bin = optionalString (!nativeTools) (getBin bintools);
# The wrapper scripts use 'cat' and 'grep', so we may need coreutils.
coreutils_bin = optionalString (!nativeTools) (getBin coreutils);
# See description in cc-wrapper.
suffixSalt = replaceStrings ["-" "."] ["_" "_"] targetPlatform.config;
# The dynamic linker has different names on different platforms. This is a
# shell glob that ought to match it.
dynamicLinker =
/**/ if sharedLibraryLoader == null then ""
else if targetPlatform.libc == "musl" then "${sharedLibraryLoader}/lib/ld-musl-*"
else if targetPlatform.libc == "uclibc" then "${sharedLibraryLoader}/lib/ld*-uClibc.so.1"
else if (targetPlatform.libc == "bionic" && targetPlatform.is32bit) then "/system/bin/linker"
else if (targetPlatform.libc == "bionic" && targetPlatform.is64bit) then "/system/bin/linker64"
else if targetPlatform.libc == "nblibc" then "${sharedLibraryLoader}/libexec/ld.elf_so"
else if targetPlatform.system == "i686-linux" then "${sharedLibraryLoader}/lib/ld-linux.so.2"
else if targetPlatform.system == "x86_64-linux" then "${sharedLibraryLoader}/lib/ld-linux-x86-64.so.2"
# ELFv1 (.1) or ELFv2 (.2) ABI
else if targetPlatform.isPower64 then "${sharedLibraryLoader}/lib/ld64.so.*"
# ARM with a wildcard, which can be "" or "-armhf".
else if (with targetPlatform; isAarch32 && isLinux) then "${sharedLibraryLoader}/lib/ld-linux*.so.3"
else if targetPlatform.system == "aarch64-linux" then "${sharedLibraryLoader}/lib/ld-linux-aarch64.so.1"
else if targetPlatform.system == "powerpc-linux" then "${sharedLibraryLoader}/lib/ld.so.1"
else if targetPlatform.isMips then "${sharedLibraryLoader}/lib/ld.so.1"
# `ld-linux-riscv{32,64}-<abi>.so.1`
else if targetPlatform.isRiscV then "${sharedLibraryLoader}/lib/ld-linux-riscv*.so.1"
else if targetPlatform.isLoongArch64 then "${sharedLibraryLoader}/lib/ld-linux-loongarch*.so.1"
else if targetPlatform.isDarwin then "/usr/lib/dyld"
else if targetPlatform.isFreeBSD then "${sharedLibraryLoader}/libexec/ld-elf.so.1"
else if hasSuffix "pc-gnu" targetPlatform.config then "ld.so.1"
else "";
in
stdenvNoCC.mkDerivation {
pname = targetPrefix
+ (if name != "" then name else "${bintoolsName}-wrapper");
version = optionalString (bintools != null) bintoolsVersion;
preferLocalBuild = true;
outputs = [ "out" ] ++ optionals propagateDoc ([ "man" ] ++ optional (bintools ? info) "info");
passthru = {
inherit targetPrefix suffixSalt;
inherit bintools libc nativeTools nativeLibc nativePrefix isGNU isLLVM;
emacsBufferSetup = pkgs: ''
; We should handle propagation here too
(mapc
(lambda (arg)
(when (file-directory-p (concat arg "/lib"))
(setenv "NIX_LDFLAGS_${suffixSalt}" (concat (getenv "NIX_LDFLAGS_${suffixSalt}") " -L" arg "/lib")))
(when (file-directory-p (concat arg "/lib64"))
(setenv "NIX_LDFLAGS_${suffixSalt}" (concat (getenv "NIX_LDFLAGS_${suffixSalt}") " -L" arg "/lib64"))))
'(${concatStringsSep " " (map (pkg: "\"${pkg}\"") pkgs)}))
'';
inherit defaultHardeningFlags;
};
dontBuild = true;
dontConfigure = true;
enableParallelBuilding = true;
unpackPhase = ''
src=$PWD
'';
installPhase =
''
mkdir -p $out/bin $out/nix-support
wrap() {
local dst="$1"
local wrapper="$2"
export prog="$3"
export use_response_file_by_default=${if isCCTools then "1" else "0"}
substituteAll "$wrapper" "$out/bin/$dst"
chmod +x "$out/bin/$dst"
}
''
+ (if nativeTools then ''
echo ${nativePrefix} > $out/nix-support/orig-bintools
ldPath="${nativePrefix}/bin"
'' else ''
echo $bintools_bin > $out/nix-support/orig-bintools
ldPath="${bintools_bin}/bin"
''
# Solaris needs an additional ld wrapper.
+ optionalString (targetPlatform.isSunOS && nativePrefix != "") ''
ldPath="${nativePrefix}/bin"
exec="$ldPath/${targetPrefix}ld"
wrap ld-solaris ${./ld-solaris-wrapper.sh}
'')
# If we are asked to wrap `gas` and this bintools has it,
# then symlink it (`as` will be symlinked next).
# This is mainly for the wrapped gnat-bootstrap on x86-64 Darwin,
# as it must have both the GNU assembler from cctools (installed as `gas`)
# and the Clang integrated assembler (installed as `as`).
# See pkgs/os-specific/darwin/binutils/default.nix for details.
+ optionalString wrapGas ''
if [ -e $ldPath/${targetPrefix}gas ]; then
ln -s $ldPath/${targetPrefix}gas $out/bin/${targetPrefix}gas
fi
''
# Create symlinks for rest of the binaries.
+ ''
for binary in objdump objcopy size strings as ar nm gprof dwp c++filt addr2line \
ranlib readelf elfedit dlltool dllwrap windmc windres; do
if [ -e $ldPath/${targetPrefix}''${binary} ]; then
ln -s $ldPath/${targetPrefix}''${binary} $out/bin/${targetPrefix}''${binary}
fi
done
'' + (if !useMacosReexportHack then ''
if [ -e ''${ld:-$ldPath/${targetPrefix}ld} ]; then
wrap ${targetPrefix}ld ${./ld-wrapper.sh} ''${ld:-$ldPath/${targetPrefix}ld}
fi
'' else ''
ldInner="${targetPrefix}ld-reexport-delegate"
wrap "$ldInner" ${./macos-sierra-reexport-hack.bash} ''${ld:-$ldPath/${targetPrefix}ld}
wrap "${targetPrefix}ld" ${./ld-wrapper.sh} "$out/bin/$ldInner"
unset ldInner
'') + ''
for variant in $ldPath/${targetPrefix}ld.*; do
basename=$(basename "$variant")
wrap $basename ${./ld-wrapper.sh} $variant
done
'';
strictDeps = true;
depsTargetTargetPropagated = extraPackages;
setupHooks = [
../setup-hooks/role.bash
./setup-hook.sh
];
postFixup =
##
## General libc support
##
optionalString (libc != null) (''
touch "$out/nix-support/libc-ldflags"
echo "-L${libc_lib}${libc.libdir or "/lib"}" >> $out/nix-support/libc-ldflags
echo "${libc_lib}" > $out/nix-support/orig-libc
echo "${libc_dev}" > $out/nix-support/orig-libc-dev
''
##
## Dynamic linker support
##
+ optionalString (sharedLibraryLoader != null) ''
if [[ -z ''${dynamicLinker+x} ]]; then
echo "Don't know the name of the dynamic linker for platform '${targetPlatform.config}', so guessing instead." >&2
local dynamicLinker="${sharedLibraryLoader}/lib/ld*.so.?"
fi
''
# Expand globs to fill array of options
+ ''
dynamicLinker=($dynamicLinker)
case ''${#dynamicLinker[@]} in
0) echo "No dynamic linker found for platform '${targetPlatform.config}'." >&2;;
1) echo "Using dynamic linker: '$dynamicLinker'" >&2;;
*) echo "Multiple dynamic linkers found for platform '${targetPlatform.config}'." >&2;;
esac
if [ -n "''${dynamicLinker-}" ]; then
echo $dynamicLinker > $out/nix-support/dynamic-linker
${if targetPlatform.isDarwin then ''
printf "export LD_DYLD_PATH=%q\n" "$dynamicLinker" >> $out/nix-support/setup-hook
'' else optionalString (sharedLibraryLoader != null) ''
if [ -e ${sharedLibraryLoader}/lib/32/ld-linux.so.2 ]; then
echo ${sharedLibraryLoader}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
fi
touch $out/nix-support/ld-set-dynamic-linker
''}
fi
'')
##
## User env support
##
# Propagate the underling unwrapped bintools so that if you
# install the wrapper, you get tools like objdump (same for any
# binaries of libc).
+ optionalString (!nativeTools) ''
printWords ${bintools_bin} ${optionalString (libc != null) libc_bin} > $out/nix-support/propagated-user-env-packages
''
##
## Man page and info support
##
+ optionalString propagateDoc (''
ln -s ${bintools.man} $man
'' + optionalString (bintools ? info) ''
ln -s ${bintools.info} $info
'')
##
## Hardening support
##
# some linkers on some platforms don't support specific -z flags
+ ''
export hardening_unsupported_flags=""
if [[ "$($ldPath/${targetPrefix}ld -z now 2>&1 || true)" =~ un(recognized|known)\ option ]]; then
hardening_unsupported_flags+=" bindnow"
fi
if [[ "$($ldPath/${targetPrefix}ld -z relro 2>&1 || true)" =~ un(recognized|known)\ option ]]; then
hardening_unsupported_flags+=" relro"
fi
''
+ optionalString hostPlatform.isCygwin ''
hardening_unsupported_flags+=" pic"
''
+ optionalString (targetPlatform.isAvr || targetPlatform.isWindows) ''
hardening_unsupported_flags+=" relro bindnow"
''
+ optionalString (libc != null && targetPlatform.isAvr) ''
for isa in avr5 avr3 avr4 avr6 avr25 avr31 avr35 avr51 avrxmega2 avrxmega4 avrxmega5 avrxmega6 avrxmega7 tiny-stack; do
echo "-L${getLib libc}/avr/lib/$isa" >> $out/nix-support/libc-cflags
done
''
+ optionalString targetPlatform.isDarwin ''
echo "-arch ${targetPlatform.darwinArch}" >> $out/nix-support/libc-ldflags
''
##
## GNU specific extra strip flags
##
# TODO(@sternenseemann): make a generic strip wrapper?
+ optionalString (bintools.isGNU or false) ''
wrap ${targetPrefix}strip ${./gnu-binutils-strip-wrapper.sh} \
"${bintools_bin}/bin/${targetPrefix}strip"
''
###
### Remove certain timestamps from final binaries
###
+ optionalString (targetPlatform.isDarwin && !(bintools.isGNU or false)) ''
echo "export ZERO_AR_DATE=1" >> $out/nix-support/setup-hook
''
+ ''
for flags in "$out/nix-support"/*flags*; do
substituteInPlace "$flags" --replace $'\n' ' '
done
substituteAll ${./add-flags.sh} $out/nix-support/add-flags.sh
substituteAll ${./add-hardening.sh} $out/nix-support/add-hardening.sh
substituteAll ${../wrapper-common/utils.bash} $out/nix-support/utils.bash
''
###
### Ensure consistent LC_VERSION_MIN_MACOSX
###
+ optionalString targetPlatform.isDarwin (
let
inherit (targetPlatform)
darwinPlatform darwinSdkVersion
darwinMinVersion darwinMinVersionVariable;
in ''
export darwinPlatform=${darwinPlatform}
export darwinMinVersion=${darwinMinVersion}
export darwinSdkVersion=${darwinSdkVersion}
export darwinMinVersionVariable=${darwinMinVersionVariable}
substituteAll ${./add-darwin-ldflags-before.sh} $out/nix-support/add-local-ldflags-before.sh
''
)
##
## Code signing on Apple Silicon
##
+ optionalString (targetPlatform.isDarwin && targetPlatform.isAarch64) ''
echo 'source ${postLinkSignHook}' >> $out/nix-support/post-link-hook
export signingUtils=${signingUtils}
wrap \
${targetPrefix}install_name_tool \
${./darwin-install_name_tool-wrapper.sh} \
"${bintools_bin}/bin/${targetPrefix}install_name_tool"
wrap \
${targetPrefix}strip ${./darwin-strip-wrapper.sh} \
"${bintools_bin}/bin/${targetPrefix}strip"
''
##
## Extra custom steps
##
+ extraBuildCommands;
env = {
# for substitution in utils.bash
# TODO(@sternenseemann): invent something cleaner than passing in "" in case of absence
expandResponseParams = "${expand-response-params}/bin/expand-response-params";
# TODO(@sternenseemann): rename env var via stdenv rebuild
shell = (getBin runtimeShell + runtimeShell.shellPath or "");
gnugrep_bin = optionalString (!nativeTools) gnugrep;
wrapperName = "BINTOOLS_WRAPPER";
inherit dynamicLinker targetPrefix suffixSalt coreutils_bin;
inherit bintools_bin libc_bin libc_dev libc_lib;
default_hardening_flags_str = builtins.toString defaultHardeningFlags;
};
meta =
let bintools_ = optionalAttrs (bintools != null) bintools; in
(optionalAttrs (bintools_ ? meta) (removeAttrs bintools.meta ["priority"])) //
{ description =
attrByPath ["meta" "description"] "System binary utilities" bintools_
+ " (wrapper script)";
priority = 10;
} // optionalAttrs useMacosReexportHack {
platforms = platforms.darwin;
};
}
|