HACKS revision 1.153
1 # $NetBSD: HACKS,v 1.153 2014/12/02 08:31:18 dennis Exp $ 2 # 3 # This file is intended to document workarounds for currently unsolved 4 # (mostly) compiler bugs. 5 # 6 # Format: 7 # hack title 8 # cdate creation date 9 # mdate mod date 10 # who responsible developer 11 # port ... 12 # affected ports, space separated, if not "all" 13 # file affected file : revision : line from : line to 14 # affected files and revision and line numbers describing hack 15 # multiple lines if necessary. 16 # pr NNNN ... 17 # problem reports this hack works around, if known. Space 18 # separated. 19 # regress src/regress/directory/where/test/found 20 # regression test directories, if available. 21 # descr 22 # insert short informal description (multi-line). (Longer ones 23 # should be in the PR database. More formal descriptions might 24 # be in the regress tree. See above). 25 # kcah 26 # closing bracket. 27 # 28 # this is a comment. 29 30 hack netstat ieee1394 address printing. 31 mdate 14 Nov 2000 32 who matt 33 file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34 descr 35 Because the current implementation of IP over IEEE1394, the 36 fw device address contains more than just the IEEE1394 EUI-64. 37 So when printing out IEEE1394 addresses, ignore the extra stuff. 38 kcah 39 40 hack xterm vs. libterm 41 mdate 01 Aug 2000 42 who jdc 43 file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44 pr 10383 45 descr 46 In order to extend the termcap string over 1023 bytes, a ZZ entry was 47 introduced to point to a memory location containing the full entry. 48 Without this hack, xterm will export a termcap containing the ZZ 49 entry, which will then be ignored by libterm. As xterm modifies the 50 exported termcap, this would cause those modifications to be ignored. 51 kcah 52 53 hack wi-at-big-endian-bus 54 cdate 15 Mar 2002 55 who martin 56 file dev/ic/wireg.h 57 descr Add an option to access the underlying bus in big endian byte order 58 to work around deficiencies in bus_space_{read,write}_* macros. 59 Those don't allow the implementation of a proper pcmcia bus space 60 tag. 61 kcah 62 63 hack specific knowledge of colours in curses code 64 cdate Sun Apr 6 11:05:24 BST 2003 65 who jdc 66 file lib/libcurses/color.c : r1.24 67 descr 68 Swap red/blue and yellow/cyan colours for COLOR_OTHER. 69 Fix is to enhance libtermcap to understand terminfo-style % sequences. 70 See also: 71 http://mail-index.NetBSD.org/tech-userlevel/2003/04/06/0000.html 72 kcah 73 74 hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75 cdate 21 Aug 2003 76 who he 77 file sys/miscfs/procfs/procfs_linux.c : 1.14 78 descr 79 Not all ports have LINUX_USRSTACK and/or USRSTACK defined as 80 literals/constants, but refer to variables of a type which is 81 not "unsigned long", causing compilation of procfs_linux.c to 82 fail with "makes integer from pointer without a cast". This 83 is observed on e.g. the sun3 port. Ideally the "types" for 84 symbols should be consistent across all ports. 85 kcah 86 87 hack gcc-strict-aliasing 88 cdate 6 August 2004 89 who junyoung 90 pr 26516 91 file src/usr.sbin/racoon/racoon/Makefile : 1.21 92 descr 93 GCC issues a warning "dereferencing type-punned pointer will break 94 strict-aliasing rules" when compiling 95 crypto/dist/kame/racoon/crypto/openssl.c with -O[23s]. Note that this 96 is due to use of type casting in a non-standard way in the code and 97 not a compiler bug. Once a new release of KAME with a proper fix 98 applied is imported this should be backed out. 99 kcah 100 101 hack gcc4 wrong uninitialized variable 102 mdate 10 May 2006 103 who mrg 104 file bin/ksh/eval.c : 1.6 105 file bin/sh/histedit.c : 1.39 106 file bin/sh/parser.c : 1.60 107 file crypto/dist/heimdal/kdc/524.c : 1.10 108 file crypto/dist/ssh/sftp.c : 1.20 109 file crypto/dist/ssh/ssh-keysign.c : 1.11 110 file dist/ipf/lib/hostname.c : 1.2 111 file dist/ipf/tools/ipmon.c : 1.8 112 file dist/ntp/ntpd/ntp_request.c : 1.4 113 file dist/ntp/ntpd/refclock_shm.c : 1.4 114 file dist/ntp/sntp/timing.c : 1.3 115 file dist/pppd/pppstats/pppstats.c : 1.3 116 file dist/smbfs/lib/smb/rap.c : 1.6 117 file dist/tcpdump/print-zephyr.c : 1.5 118 file distrib/utils/sysinst/aout2elf.c : 1.12 119 file gnu/libexec/uucp/uucico/uucico.c : 1.6 120 file lib/libc/citrus/citrus_csmapper.c : 1.6 121 file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122 file lib/libc/inet/inet_cidr_ntop.c : 1.3 123 file lib/libc/inet/inet_ntop.c : 1.3 124 file lib/libc/stdio/vfwprintf.c : 1.8 125 file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126 file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127 file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128 file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129 file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130 file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131 file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132 file sbin/fsck_ext2fs/dir.c : 1.19 133 file sbin/routed/rtquery/rtquery.c : 1.18 134 file sys/arch/amd64/amd64/pmap.c : 1.26 135 file sys/arch/i386/pci/piixpcib.c : 1.4 136 file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137 file sys/crypto/cast128/cast128.c : 1.9 138 file sys/ddb/db_command.c : 1.86 139 file sys/dev/cardbus/cardbus_map.c : 1.21 140 file sys/dev/fss.c : 1.25 141 file sys/dev/ic/igsfb.c : 1.39 142 file sys/dev/ic/mb86950.c : 1.5 143 file sys/dev/ic/midway.c : 1.71 144 file sys/dev/kttcp.c : 1.18 145 file sys/dev/rasops/rasops_bitops.h : 1.9 146 file sys/dev/pci/cmpci.c : 1.31 147 file sys/dev/pci/machfb.c : 1.45 148 file sys/dev/usb/ohci.c : 1.174 149 file sys/dev/usb/uhci.c : 1.196 150 file sys/dev/rasops/rasops_bitops.h : 1.9 151 file sys/dist/ipf/netinet/ip_nat.c : 1.10 152 file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153 file sys/dist/pf/net/pf.c : 1.22 154 file sys/fs/udf/udf_vnops.c : 1.4 155 file sys/kern/kern_sig.c : 1.219 156 file sys/kern/tty.c : 1.181 157 file sys/net/bpf.c : 1.116 158 file sys/net/zlib.c : 1.26 159 file sys/netccitt/if_x25subr.c : 1.37 160 file sys/netinet/in.c : 1.107 161 file sys/netsmb/smb_smb.c : 1.27 162 file sys/netsmb/smb_trantcp.c : 1.22 163 file sys/nfs/nfs_serv.c : 1.108 164 file sys/nfs/nfs_socket.c : 1.129 165 file sys/nfs/nfs_syscalls.c : 1.91 166 file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167 file usr.bin/ftp/ftp.c : 1.140 168 file usr.bin/find/function.c : 1.54 169 file usr.bin/mail/tty.c : 1.20 170 file usr.bin/msgc/msg_sys.def : 1.33-1.34 171 file usr.bin/nl/nl.c : 1.7 172 file usr.bin/systat/keyboard.c : 1.23 173 file usr.bin/usbhidctl/usbhid.c : 1.29 174 file usr.bin/vi/cl/cl_read.c : 1.5 175 file usr.bin/vi/ex/ex_cscope.c : 1.12 176 file usr.bin/vi/ex/ex_tag.c : 1.19 177 file usr.bin/vi/vi/v_txt.c : 1.15 178 file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179 file usr.sbin/cron/do_command.c : 1.19 180 file usr.sbin/timed/timed/slave.c : 1.15 181 descr 182 GCC 4.1 gets many uninitialised variable warnings wrong. We should 183 really audit all the old hacks like this when older compilers are 184 removed from the tree, as many are probably no longer required. 185 The problem is that it does not recognize initialization via function 186 call pointer. I.e. 187 int p; 188 foo(&p); 189 does not mark p as initialized. 190 kcah 191 192 hack gcc4 pointer sign and strict aliasing problems 193 mdate 10 May 2006 194 who mrg 195 file bin/ed/Makefile : 1.33 196 file distrib/utils/sysinst/Makefile.inc : 1.44 197 file distrib/utils/x_dhclient/Makefile : 1.15 198 file games/bcd/Makefile : 1.5 199 file games/dab/Makefile : 1.5 200 file games/larn/Makefile : 1.17 201 file games/pom/Makefile : 1.5 202 file lib/libasn1/Makefile : 1.26 203 file lib/libcrypt/Makefile : 1.17 204 file lib/libgssapi/Makefile : 1.16 205 file lib/libhdb/Makefile : 1.20 206 file lib/libkadm5clnt/Makefile : 1.21 207 file lib/libkadm5srv/Makefile : 1.25 208 file lib/libkrb5/Makefile : 1.35 209 file lib/libssh/Makefile : 1.6 210 file lib/libtelnet/Makefile : 1.26 211 file libexec/getty/Makefile : 1.14 212 file libexec/kadmind/Makefile : 1.19 213 file libexec/kpasswdd/Makefile : 1.14 214 file sbin/atactl/Makefile : 1.3 215 file sbin/cgdconfig/Makefile : 1.7 216 file sbin/clri/Makefile : 1.13 217 file sbin/dkctl/Makefile : 1.4 218 file sbin/dump/Makefile : 1.33 219 file sbin/fdisk/Makefile : 1.35 220 file sbin/fsck_ext2fs/Makefile : 1.11 221 file sbin/fsck_ffs/Makefile : 1.29 222 file sbin/fsdb/Makefile : 1.18 223 file sbin/mount_smbfs/Makefile : 1.4 224 file sbin/newfs/Makefile : 1.30 225 file sbin/newfs_sysvbfs/Makefile : 1.2 226 file sbin/restore/Makefile : 1.23 227 file sbin/veriexecctl/Makefile : 1.11 228 file sys/lib/libsa/Makefile : 1.59 229 file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230 file usr.bin/awk/Makefile : 1.9 231 file usr.bin/crontab/Makefile : 1.24 232 file usr.bin/ctags/Makefile : 1.8 233 file usr.bin/gzip/Makefile : 1.10 234 file usr.bin/ssh/sftp/Makefile : 1.10 235 file usr.bin/ssh/ssh/Makefile : 1.25 236 file usr.bin/vi/build/Makefile : 1.26 237 file usr.bin/telnet/Makefile : 1.40 238 file usr.bin/tn3270/tn3270/Makefile : 1.36 239 file usr.bin/tr/Makefile : 1.4 240 file usr.sbin/amd/amd/Makefile : 1.27 241 file usr.sbin/amd/amq/Makefile : 1.14 242 file usr.sbin/amd/libamu/Makefile : 1.20 243 file usr.sbin/amd/pawd/Makefile : 1.5 244 file usr.sbin/bind/Makefile.inc : 1.22 245 file usr.sbin/bind/libdns/Makefile : 1.3 246 file usr.sbin/bind/named/Makefile : 1.17 247 file usr.sbin/bootp/bootptest/Makefile : 1.2 248 file usr.sbin/chrtbl/Makefile : 1.6 249 file usr.sbin/cron/Makefile : 1.12 250 file usr.sbin/dhcp/Makefile.inc : 1.20 251 file usr.sbin/dumplfs/Makefile : 1.11 252 file usr.sbin/hprop/Makefile : 1.13 253 file usr.sbin/installboot/Makefile : 1.35 254 file usr.sbin/ipf/ipftest/Makefile : 1.32 255 file usr.sbin/isdn/isdnd/Makefile : 1.6 256 file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257 file usr.sbin/isdn/isdntel/Makefile : 1.2 258 file usr.sbin/isdn/isdntrace/Makefile : 126 259 file usr.sbin/mopd/common/Makefile : 1.10 260 file usr.sbin/mopd/mopd/Makefile : 1.9 261 file usr.sbin/mopd/mopprobe/Makefile : 1.7 262 file usr.sbin/makefs/Makefile : 1.17 263 file usr.sbin/mscdlabel/Makefile : 1.5 264 file usr.sbin/pkg_install/add/Makefile : 1.7 265 file usr.sbin/pkg_install/create/Makefile : 1.5 266 file usr.sbin/pkg_install/lib/Makefile : 1.28 267 file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268 file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269 file usr.sbin/pppd/Makefile.inc : 1.3 270 file usr.sbin/pppd/pppd/Makefile : 1.38 271 file usr.sbin/rarpd/Makefile : 1.10 272 file usr.sbin/rbootd/Makefile : 1.10 273 file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274 file usr.sbin/rtadvd/Makefile : 1.9 275 file usr.sbin/tcpdump/Makefile : 1.42 276 file usr.sbin/wiconfig/Makefile : 1.3 277 descr 278 GCC 4.1 warns on pointer sign comparision/assignments and lots of 279 code does not conform. For now we use -Wno-pointer-sign and 280 -fno-strict-aliasing. 281 kcah 282 283 hack disable ctf for gcc-4.8 build 284 mdate April 3 2014 285 who christos 286 file external/gpl3/gcc/usr.bin/Makefile.frontend : 1.4 287 file external/gpl3/gcc/usr.bin/Makefile.backend : 1.5 288 descr 289 nbctfconvert -g -L VERSION -g fold-const.o 290 ERROR: fold-const.c: failed to get mapping for tid 79154 \ 291 ((null)) <13532> 292 kcak 293 294 hack emacs aborting on exit (libgcc issue) 295 mdate 7 November 2011 296 who christos 297 file external/gpl3/gcc/dist/gcc/unwind-dw2-fde.c : 1.2 298 descr 299 GCC 4.5.3 now calls __unregister_frame_info_bases() on unloading/exit 300 to do just that. If the symbol requested is not found, then it aborts. 301 emacs 23.3 triggers this assertion. For now disable aborting, and 302 silently ignore. 303 kcah 304 305 hack cross-building hack on Darwin 306 mdate 20 July 2008 307 who agc 308 file src/distrib/common/Makefile.mdset : 1.33 309 descr 310 Darwin has problems with getopt() when used in mdsetimage -v, 311 due to the difference between BSD and libiberty() getopt 312 implementations, more fully described in 313 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 314 and the subsequent thread. For just now, we just have an ugly 315 workaround not to call mdsetimage with the -v argument on Darwin 316 kcah 317 318 hack avoid rebuilding asn1 libraries 319 mdate 03 August 2008 320 who veego 321 file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 322 file src/lib/libasn1/Makefile : 1.32 323 file src/lib/libhdb/Makefile : 1.23 324 file src/lib/libgssapi/Makefile : 1.20 325 file src/lib/libhx509/Makefile : 1.3 326 pr 9702 39185 327 descr 328 asn1_compile does not check if generated header files do not have to 329 be rebuild. 330 Generate .hx files and copy it in the Makefiles if they changed. 331 kcah 332 333 hack avoid gcc4 -O1 bug in loop optimize 334 cdate 29 November 2008 335 who tsutsui 336 file src/sbin/ifconfig/Makefile : 1.39 337 pr 40036 40066 338 descr 339 gcc -O1 seems to generate wrong code in loop optimize so that 340 ifconfig lo0 inet6 doesn't return error even if a kernel 341 doesn't have IPv6 support. (see the above PRs for details) 342 For workaround, specify -fno-loop-optimize on m68000, 343 which uses -O1 by default. 344 kcah 345 346 hack MKPIE ldscript for /usr.sbin/crash 347 cdate 22 April 2010 348 who christos 349 file src/usr.sbin/crash/Makefile : 1.5 350 file src/usr.sbin/crash/ldscript.crash : 1.1 351 pr N/A 352 descr 353 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 354 sections 355 kcah 356 357 hack Disable fortification for /usr/bin/makeinfo 358 cdata 24 Mar 2014 359 who tron 360 file src/gnu/usr.bin/texinfo/makeinfo/Makefile : 1.8 361 pr N/A 362 descr 363 If "makeinfo" is compiled with "-D_FORTIFY_SOURCE=2" using GCC 4.8.3 364 it fails to process certain texinfo files, e.g. "cl.texi" 365 included in the Emacs 24.3 distribution. 366 kcah 367 368 hack Disable Stack Smash Protection for /usr/X11R7/bin/xauth 369 cdata 05 Apr 2014 370 who tron 371 file src/external/mit/xorg/bin/xauth/Makefile : 1.4 372 pr N/A 373 descr 374 If "xauth" is compile with "USE_SSP" set to "yes" it fails 375 mysteriously with an error message like this: 376 377 /usr/X11R7/bin/xauth: file /foo/bar/.Xauthority does not exist 378 /usr/X11R7/bin/xauth: unable to link authority file /foo/bar/.Xauthority, use /foo/bar/.Xauthority 379 380 The compiler seems to get confused about the two filename variables 381 used in the link(2) system call. 382 kcah 383 384 port vax 385 386 hack gcc4/vax ICE 387 cdate 388 who tsutsui 389 file sys/arch/vax/conf/Makefile.vax 390 descr 391 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 392 -fno-tree-ter prevents it so add it to COPTS. 393 kcah 394 395 hack gcc4/vax compiler crash 396 cdate Fri Jun 30 22:39:12 PDT 2006 397 who mrg 398 file bin/csh/Makefile : 1.27 399 file lib/i18n_module/UTF7/Makefile : 1.2 400 descr 401 GCC4 on vax crashes. -O0 stops it happening so far... 402 kcah 403 404 hack gcc 2.95/vax doesn't like abort being used as function pointer 405 cdate Tue Dec 13 05:54:50 GMT 2005 406 who jmc 407 file lib/libc/rpc/svc_vc.c 1.15 408 descr 409 Provide a local definition for abort which doesn't include 410 the noreturn attribute which trips up gcc 2.95 on vax. 411 kcah 412 413 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 414 cdate Mon May 9 12:16:22 CDT 2005 415 who jmc 416 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 417 gnu/usr.bin/gettext/libgrep/Makefile 1.3 418 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 419 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 420 descr 421 The latest gettext assumes a C99 environment or at least 422 configure checks to work around this. As we don't use configure 423 provide a stdbool.h for vax builds locally in directories from 424 the template provided by the gettext code. 425 kcah 426 427 hack gcc 2.95/vax cannot handle __builtin_ffs() 428 cdate Fri Aug 23 21:31:15 CEST 2002 429 who ragge 430 file sys/lib/libkern/libkern.h : 1.42 431 descr 432 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 433 added this feature to GCC 3 so it can be removed when switching. 434 kcah 435 436 hack gcc 2.95/vax libbz2 437 mdate 27 Jun 2002 438 who thorpej 439 file lib/libbz2/Makefile 440 descr 441 libbz2 is mis-compiled with optimization with GCC 2.95.3 442 on VAX. -O0 works around this problem. 443 kcah 444 445 hack vax Toolchain bug 446 cdate 28 Mar 2003 447 who he 448 file sys/arch/vax/vax/intvec.S : 1.5 449 descr 450 Workaround for PR toolchain/20924. The assembler apparently 451 tries to range-check byte offsets when it doesn't have 452 sufficient information to make that decision. 453 Workaround uses `brw' instead of `brb' instruction. 454 kcah 455 456 hack vax gcc 2.95.3 -Wuninitialized workarounds 457 cdate 6 Nov 2003 458 who he 459 file sys/dev/bi/if_ni.c : 1.22 460 file sys/arch/vax/vax/ctu.c : 1.20 461 descr 462 Workaround for gcc 2.95.3 failing to detect that certain 463 variables will be initialized; so that this code compiles 464 with -Wuninitialized. Should be reviewed and possibly 465 reverted when gcc 3.3.2 is ready for vax. 466 kcah 467 468 hack vax gcc 2.95.3 structure initialization 469 cdat 13 May 2004 470 who cl 471 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 472 descr 473 Workaround for gcc 2.95.3 failing to initialize structures 474 and/or unions inside structures using nested designators. 475 Should be reverted when gcc >=3.3.3 is ready for vax. 476 kcah 477 478 hack vax gcc 2.95.3 needs -I. to build nslexer.c 479 cdat 6 Jun 2004 480 who mhitch 481 file lib/libc/arch/vax/Makefile.inc : 1.6 482 descr 483 It appears necessary to add -I. to CPPFLAGS when building 484 nslesxer.c. This may be caused by gcc 2.95.3 being used. 485 Should be reverted when a newer gcc is ready for vax. 486 kcah 487 488 hack vax gcc 2.95.3 doesn't understand "-std=c99" 489 cdat 5 April 2005 490 who tron 491 file src/share/mk/bsd.sys.mk 492 descr 493 We cannot use "-std=c99" for compiler warning level 4 and above 494 because gcc 2.95.3 doesn't support that option. 495 kcah 496 497 hack declare boolean_t in two IPF user-mode programs 498 cdate Tue Mar 7 19:19:20 CET 2006 499 who he 500 file dist/ipf/ipsend/iptests.c : 1.8 501 dist/ipf/ipsend/sock.c : 1.7 502 descr 503 The IPF user-mode programs ipsend and iptest first 504 include <sys/types.h> without _KERNEL defined, and 505 later include <sys/file.h> with _KERNEL defined. 506 This causes a build failure when building for vax, 507 since <sys/device.h> ends up being included without 508 bollean_t being defined by <sys/types.h>. 509 Build failure and further details documented in 510 PR#32907. 511 kcah 512 513 hack pcc 0.9.9 large string literals 514 cdat 8 July 2008 515 who gmcgarry 516 file sys/conf/param.c : 1.58 517 descr 518 Workaround for pcc 0.9.9 not handling large string literals 519 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 520 fail compilation. 521 There is a proposal on the pcc mailing list to stuff config 522 file in ELF section. 523 kcah 524 525 hack xorg warnings 526 cdat 30 July 2008, 3 June, 2013 527 who mrg 528 file external/mit/xorg/lib/libSM/Makefile : 1.2 529 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.10 530 external/mit/xorg/lib/libXext/Makefile : 1.2 531 external/mit/xorg/lib/libXfont/Makefile : 1.2 532 descr 533 Disable several warnings or use -Wno-error across Xorg sources 534 while we get them working 535 kcah 536 537 hack 32 bit time leftovers 538 cdat 11 January 2009 539 who christos 540 file lib/libc/time/localtime.c : 1.41 541 lib/libc/time/zic.c : 1.23 542 descr 543 The timezone compiled files still contain 32 bit time_t 544 quantities. I did not want to version the files because 545 the ``parser'' is too ugly for words. What needs to be 546 done, is to rewrite the parser from scratch also to avoid 547 potential core-dumps from parsing invalid files. 548 kcah 549 550 hack 32 bit time leftovers 551 cdat 11 January 2009 552 who christos 553 file various 554 descr 555 Many filesystem on-disk formats have 32 bit times. 556 kcah 557 558 hack gcc 4.5 fsdb miscompile 559 date Sat Nov 9 11:03:02 EST 2013 560 who christos 561 file src/sbin/fsdb/Makefile : 1.36 (and earlier) 562 descr 563 src/sbin/fsdb/fsdb.c: In function 'findblk': 564 src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn: 565 (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604) 566 (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602) 567 (const_int 8 [0x8])) 568 (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \ 569 -1 (nil)) 570 src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \ 571 extract_insn, at recog.c:2103 572 kcah 573 574 hack gcc 4.8 gcc miscompiles 575 date Sat Nov 9 16:35:18 EST 2013 576 who christos 577 file distrib/utils/x_ping/Makefile 578 file distrib/vax/miniroot/Makefile.inc 579 file distrib/vax/ramdisk/Makefile 580 file external/gpl3/gdb/lib/libdecnumber/Makefile 581 file sbin/fsdb/Makefile 582 file sbin/newfs_ext2fs/Makefile 583 file sbin/ping/Makefile 584 file usr.sbin/lmcconfig/Makefile 585 file usr.sbin/mtrace/Makefile 586 descr 587 external/gpl3/gcc/dist/gcc/expmed.c:2781:1: 588 internal compiler error: in change_address_1, at emit-rtl.c:2019 589 external/gpl3/gcc/dist/gcc/recog.c:770:1: 590 internal compiler error: in change_address_1, at emit-rtl.c:2019 591 external/gpl3/gcc/dist/libdecnumber/decNumber.c:7214:3: 592 internal compiler error: in change_address_1, at emit-rtl.c:2019 593 sbin/ping/ping.c:679:1: 594 internal compiler error: in change_address_1, at emit-rtl.c:2019 595 sbin/newfs_ext2fs/mke2fs.c:681:1: 596 internal compiler error: in reload_combine_note_use, 597 at postreload.c:1561 598 external/gpl3/gdb/dist/libdecnumber/decNumber.c:7214:3: 599 internal compiler error: in change_address_1, at emit-rtl.c:2019 600 usr.sbin/lmcconfig/lmcconfig.c:939:3: 601 internal compiler error: in reload_combine_note_use, 602 at postreload.c:1561 603 usr.sbin/mtrace/mtrace.c:1655:1: 604 internal compiler error: in change_address_1, at emit-rtl.c:2019 605 kcah 606 607 port arm 608 609 hack gcc-unsigned-compare 610 cdate 09 Mar 2002 611 mdate 18 Mar 2002 612 who bjh21 613 file dist/bind/lib/nameser/ns_parse.c : 1.3 614 file dist/dhcp/minires/ns_parse.c : 1.3 615 file dist/dhcp/omapip/result.c : 1.2 616 file dist/dhcp/server/failover.c : 1.3 617 file gnu/dist/toolchain/bfd/bfd.c : 1.2 618 file gnu/dist/toolchain/bfd/format.c : 1.2 619 file gnu/dist/toolchain/gdb/target.c : 1.2 620 file sys/kern/vfs_subr.c : 1.172 621 descr When checking that a potentially-unsigned enum is >= 0, assign 622 it to an int first. This is necessary to avoid "comparison is 623 always true" warnings with -fshort-enums. Casting to an int 624 really should be enough, but turns out not to be. 625 kcah 626 627 hack gcc-4.5 arm CNAME hostname lookup failure on 628 certain DNS environment (probably -ftree-ter problem) 629 cdate Sat Dec 24 04:59:00 UTC 2011 630 mdate 631 who tsutsui 632 file lib/libc/net/Makefile.inc 1.79 633 descr Hostname lookup against CNAMEs by some commands fails 634 on certain DNS environments if lib/libc/net/gethnamaddr.c 635 (ping(8) etc) and lib/libc/net/getaddrinfo.c (ftp(1) etc) 636 are compiled with -O2, even though nslookup(1) against 637 the same CNAME returns proper hostname. 638 They works properly if compiled with -O2 -fno-tree-ter. 639 Also -O2 fails but -O2 -fno-tree-ter works on the following 640 test case in gcc bugzilla: 641 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48863#c4 642 kcah 643 644 hack gcc-4.5 arm without -fno-tree-vrp generate broken code 645 cdate Wed Nov 14 13:02:02 JST 2012 646 who msaitoh 647 file lib/libc/softfloat/Makefile.inc 648 pr 46953 649 regress src/tests/lib/libm/t_cbrt 650 regress src/tests/lib/libm/t_ceil 651 regress src/tests/lib/libm/t_exp 652 regress src/tests/lib/libm/t_log 653 regress src/tests/lib/libm/t_scalbn 654 regress src/tests/lib/libm/t_sinh 655 regress src/tests/lib/libm/t_sqrt 656 descr Gcc has a bug in tree optimization. For adddf3, 657 -INF + -INF returns 0 without -fno-tree-vrp. 658 Debugging with -fdump-tree-all shows that 659 softfloat.c.021t.cleanup_cfg is ok but softfloat.c.023t.ssa 660 is broken. 661 kcah 662 663 port sh3 664 665 hack gcc4-sh3-bz2 666 cdate Sun May 21 03:34:57 UTC 2006 667 mdate Fri May 16 13:13:00 UTC 2008 668 who mrg, tsutsui 669 file lib/libbz2/Makefile : 1.10 670 descr 671 The in-tree GCC 4.1-based compiler generated too-far 672 pc-relative addresses. Hack is to build with 673 -fno-loop-optimize. 674 kcah 675 676 port sh3eb 677 hack gcc4.8.1 678 cdate Thu Nov 7 16:31:23 EST 2013 679 who christos 680 file src/sys/rump/net/lib/libnetbt/Makefile : 1.2 681 desrc 682 for profiling 683 compile l2cap_signal.c with -O0 to avoid: 684 ./netbt/l2cap_signal.c:36: 685 /p/netbsd/cvsroot/src/sys/rump/net/lib/libnetbt/../../../../\ 686 netbt/l2cap_signal.c: In function 'l2cap_recv_signal': 687 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 688 impossible reload 689 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 690 kcah 691 692 port sh3el 693 hack gcc4.8.1 694 cdate Fri Nov 8 19:27:01 EST 2013 695 who christos 696 file src/external/bsd/libevent/lib/libevent/Makefile : 1.2 697 desrc 698 for profiling 699 compile evdns.c with -O0 to avoid: 700 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 701 impossible reload 702 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 703 kcah 704 705 hack gcc4.8.1 706 cdate Fri Nov 8 19:34:48 EST 2013 707 who christos 708 file src/usr.sbin/racoon/Makefile : 1.27 709 desrc 710 for profiling 711 compile ipsec_doi.c with -O0 to avoid: 712 ./sh3/byte_swap.h:20:2: error: 'asm' operand requires \ 713 impossible reload 714 __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x)); 715 kcah 716 717 port m68000 718 719 hack gcc4-m68000 720 cdate Fri Feb 8 10:29:37 PST 2008 721 mdate Sun May 4 15:37:19 UTC 2008 722 who mrg, tsutsui 723 file rescue/Makefile : 1.21 724 file sbin/dump_lfs/Makefile : 1.9 725 file sbin/fsck_ffs/Makefile : 1.35 726 file sbin/fsdb/Makefile : 1.22 727 file share/mk/sys.mk : 1.96 728 file usr.sbin/ndbootd/Makefile : 1.5 729 descr 730 Several internal compiler errors with gcc -O1 731 around 64bit integer arithmetic. 732 This hack uses -O1 and adds some -fno-tree-foo options 733 to avoid the problem. 734 This might be related with GCC Bugzilla Bug 32424. 735 kcah 736 737 port m68k,sh3,vax 738 739 hack gcc-4.8.1 740 cdate Wed Nov 6 20:41:35 EST 2013 741 who christos 742 file src/external/gpl3/gcc/libstdc++-v3/Makefile : 1.6 743 descr 744 compile hashtable_c++0x.cc with -O2 instead of -Os to 745 produce missing instantiation of std::lower_bound expansion 746 for unsigned long. 747 kcah 748 749 port sparc 750 751 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 752 cdate Sun Aug 14 19:26:48 PDT 2011 753 who mrg 754 file sys/arch/sparc64/sparc/cpu.c : 1.234 755 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 756 file sys/arch/sparc64/sparc/genassym.cf : 1.67 757 file sys/arch/sparc64/sparc/locore.s : 1.265 758 descr 759 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 760 Post newlock2 there was a bug where a lock was reduced from 761 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 762 would crash due to NULL IPI. This was fixed by re-using the 763 right IPL value. However, GCC 4.5.3 build kernels have the 764 same problems. For now, the hack is re-instated. 765 kcah 766 767 768 port mips 769 770 hack mips-shared-linker-load-address 771 cdate Fri Oct 7 08:33:10 UTC 2005 772 who simonb 773 file src/sys/kern/exec_elf32.c : 1.107 774 descr 775 With COMPAT_16 or previous enabled (which enables 776 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 777 load and run at address 0. The check to fix this in 778 rev 1.107 only checks the first psection of the ELF 779 executable, which may not be loadable. A more correct 780 fix is to check the first loadable psection instead of 781 just the first psection. 782 kcah 783 784 hack mips-duplicate-ras-end-label 785 cdate Sat Sep 2 23:29:42 2006 786 who martin 787 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 788 descr 789 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 790 labels by duplicated __asm output from RAS_END() 791 macro. 792 kcah 793 794 hack mips-mcount-assembler-warning 795 cdate Tue Jul 29 14:16:52 UTC 2008 796 who lukem 797 file src/lib/libc/gmon/Makefile.inc : 1.8 798 descr 799 Workaround for PR port-mips/39192. 800 common/lib/libc/gmon/mcount.c generates a (fatal) 801 assembler warning on MIPS: 802 Warning: No .cprestore pseudo-op used in PIC code 803 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 804 kcah 805 806 port i386 807 808 hack use volatile intermediate variable to enforce rounding 809 cdate Tue Aug 1 22:15:55 MEST 2006 810 who drochner 811 file src/lib/libm/src/lrintf.c : 1.4 812 file src/lib/libm/src/s_rintf.c : 1.8 813 descr 814 gcc-4 does subsequent operations on "float" values within 815 the i387 FPU without rounding the intermediate results 816 kcah 817 818 port x86 819 hack turn off optimization for biosdisk_ll.c because otherwise 820 we are pass the wrong arguments to biosdisk_read(). 821 $ cd /usr/src/sys/arch/i386/floppies/bootflopp-com 822 $ qemu-system-i386 -nographic -fda boot-com1.fs -boot a 823 who christos 824 file src/sys/arch/i386/stand/lib/Makefile : 1.38 825 descr 826 Turning on DISK_DEBUG shows the problem. We should find 827 out which option is causing this. 828 hcah 829 830 port powerpc 831 832 hack avoid using __builtin_return_address(0) because it fails in 833 Xorg's module loader 834 cdate Sat Sep 27 03:52:05 UTC 2008 835 who macallan 836 file src/libexec/ld.elf_so/rtld.c : 1.121 837 descr 838 workaround for PR port-macppc/37812 839 kcah 840 841 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 842 building the native compiler via build.sh those don't defined 843 properly. 844 cdate Sat Mar 12 08:00:00 UTC 2011 845 who matt 846 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 847 descr 848 see above 849 kcah 850 851 port powerpc64 852 853 hack include _errno.c in libposix so that __errno resolves. It 854 should resolve from libc's errno, but somehow it does not. 855 Linker bug? 856 cdate Thu Oct 27 13:19:47 EDT 2011 857 who christos 858 file src/lib/libposix/Makefile: 1.15 859 file src/lib/librt/Makefile: 1.14 860 descr 861 workaround for: 862 libposix_pic.a(cerror.pico)(.text+0x14): unresolvable \ 863 R_PPC64_REL24 relocation against symbol `.__errno' 864 kcah 865 866 hack rename data() function in mdocml to avoid redefined error. 867 Compiler/Assembler bug? 868 cdate Sat Oct 29 11:16:01 EDT 2011 869 who christos 870 file src/external/bsd/mdocml/tbl_data.c: 1.2 871 descr 872 workaround for: 873 {standard input}: Assembler messages: 874 {standard input}:105: Error: symbol `.data' is already \ 875 defined 876 kcah 877 878 port emips 879 880 hack Add nop between ctc1 and mtc0 to avoid assembler internal 881 error 882 cdate Sat Oct 29 16:57:34 EDT 2011 883 who christos 884 file src/sys/arch/mips/mips/mips_fpu.c: 1.7 885 descr 886 workaround for: 887 {standard input}: Assembler messages: 888 {standard input}:730: Internal error! 889 Assertion failure in append_insn at /usr/src/external/gpl3/\ 890 binutils/dist/gas/config/tc-mips.c line 2910. 891 kcah 892 893 port ia64 894 895 hack libc hesiod.c file does not compile with -O2 (internal 896 compiler error in gcc 4.5.3) 897 cdate Thu Dec 27 08:05:43 CET 2012 898 who martin 899 file src/lib/libc/net/Makefile.inc: 1.82 900 descr 901 workaround for: 902 {standard input}: Assembler messages: 903 {standard input}:1507: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 15 904 {standard input}:1506: Warning: This is the location of the conflicting usage 905 {standard input}: Error: 2 warnings, treating warnings as errors 906 kcah 907 908 hack libelf libelf_extended.c compiler error in gcc 4.5.3 909 cdate Thu Dec 27 09:05:51 CET 2012 910 who martin 911 file src/external/bsd/libelf/lib/Makefile: 1.3 912 descr 913 workaround for: 914 {standard input}: Assembler messages: 915 {standard input}:87: Warning: Use of 'adds' may violate RAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 33 916 {standard input}:87: Warning: Only the first path encountering the conflict is reported 917 {standard input}:85: Warning: This is the location of the conflicting usage 918 kcah 919 920 hack compiler error with gcc 4.5.x 921 cdate Thu Dec 27 15:15:25 CET 2012 922 who martin 923 file src/crypto/external/bsd/netpgp/lib/verify/Makefile: 1.5 924 descr 925 workaround for: 926 {standard input}: Assembler messages: 927 {standard input}:22979: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 8 928 {standard input}:22978: Warning: This is the location of the conflicting usage 929 kcah 930 931 port x68k 932 933 hack compiler error with gcc 4.5.x 934 cdate Fri May 24 13:23:01 EDT 2013 935 who christos 936 file src/external/gpl3/gcc/usr.bin/bakend/Makefile: 1.17 937 xsrc/external/mit/xorg/lib/libGLU/Makefile: 1.11 938 src/x11/lib/GLU/Makefile: 1.9 939 descr 940 workaround for: 941 internal compiler error: in cselib_record_set, at cselib.c:1999 942 kcah 943 944 hack fallback to /usr/bin/clang-cpp in rpcgen 945 cdate Wed Jun 5 15:49:27 CEST 2013 946 who joerg 947 file src/usr.bin/rpcgen/rpc_main.c 948 descr 949 It is undecided which compiler owns /usr/bin/cpp and whether it should 950 exist in a MKGCC=no world. To allow rpcgen to work out-of-the-box, 951 if either gcc or clang is installed, use /usr/bin/clang-cpp as fallback. 952 This applies only if RPCGEN_CPP is not set and /usr/bin/cpp is not executable. 953 kcah 954 955 port hp700 956 957 hack compiler error with gcc 4.5.x 958 cdate Tue Jul 23 07:42:28 BST 2013 959 who skrll 960 file src/sys/lib/libkern/Makefile.libkern: 1.26 961 descr 962 workaround for unanalysed codegen bug affecting md5c.c. 963 kcah 964 965 port mips64* 966 hack compiler crashes on mips64* with optimization enabled 967 cdate Tue May 13 18:46:48 UTC 2014 968 who macallan 969 file src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/Makefile.inc: 1.6 970 src/external/lgpl3/gmp/lib/libgmp/arch/mips64eb/config.h: 1.5 971 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/Makefile.inc: 1.6 972 src/external/lgpl3/gmp/lib/libgmp/arch/mips64el/config.h: 1.5 973 descr workaround for n32 gcc doing unaligned 64bit accesses when optimizing 974 pr 48696 975 kcah 976 977 port vax 978 hack compile boot with -O1 979 cdate Sat May 24 09:40:58 CEST 2014 980 who martin 981 file src/sys/arch/vax/boot/boot/Makefile: 1.41 982 descr /boot does not work when compiled with -O2 and gcc 4.8 983 kcah 984 985 port riscv64 986 hack compile a couple of libasan files at -O0 for riscv64 987 cdate Tue Dec 2 16:17:48 HKT 2014 988 who dennis 989 file src/external/gpl3/gcc/lib/libasan/Makefile: 1.8 990 descr Attempting to compile the libasan files asan_allocator2.cc and 991 sanitizer_netbsd.cc with gcc 4.8.3 at any optimization level 992 other than -O0 results in an internal compiler error. The 993 compiler seems to have trouble around C11 atomics in particular. 994 pr 49425 995 kcah 996 997
Indexes created Wed Nov 05 19:10:08 GMT 2025