HACKS revision 1.116
1# $NetBSD: HACKS,v 1.116 2011/08/15 02:29:38 mrg 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 30hack netstat ieee1394 address printing. 31mdate 14 Nov 2000 32who matt 33file lib/libc/net/getnameinfo.c : 1.32 : 497 : 503 34descr 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. 38kcah 39 40hack xterm vs. libterm 41mdate 01 Aug 2000 42who jdc 43file xsrc/xc/programs/xterm/main.c : 1.2 : 3609 : 3614 44pr 10383 45descr 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. 51kcah 52 53hack wi-at-big-endian-bus 54cdate 15 Mar 2002 55who martin 56file dev/ic/wireg.h 57descr 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. 61kcah 62 63hack specific knowledge of colours in curses code 64cdate Sun Apr 6 11:05:24 BST 2003 65who jdc 66file lib/libcurses/color.c : r1.24 67descr 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 72kcah 73 74hack Compensation for differing types of LINUX_USRSTACK and USRSTACK 75cdate 21 Aug 2003 76who he 77file sys/miscfs/procfs/procfs_linux.c : 1.14 78descr 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. 85kcah 86 87hack gcc-strict-aliasing 88cdate 6 August 2004 89who junyoung 90pr 26516 91file src/usr.sbin/racoon/racoon/Makefile : 1.21 92descr 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. 99kcah 100 101hack gcc4 wrong uninitialized variable 102mdate 10 May 2006 103who mrg 104file bin/ksh/eval.c : 1.6 105file bin/sh/histedit.c : 1.39 106file bin/sh/parser.c : 1.60 107file crypto/dist/heimdal/kdc/524.c : 1.10 108file crypto/dist/ssh/sftp.c : 1.20 109file crypto/dist/ssh/ssh-keysign.c : 1.11 110file dist/ipf/lib/hostname.c : 1.2 111file dist/ipf/tools/ipmon.c : 1.8 112file dist/ntp/ntpd/ntp_request.c : 1.4 113file dist/ntp/ntpd/refclock_shm.c : 1.4 114file dist/ntp/sntp/timing.c : 1.3 115file dist/pppd/pppstats/pppstats.c : 1.3 116file dist/smbfs/lib/smb/rap.c : 1.6 117file dist/tcpdump/print-zephyr.c : 1.5 118file distrib/utils/sysinst/aout2elf.c : 1.12 119file gnu/libexec/uucp/uucico/uucico.c : 1.6 120file lib/libc/citrus/citrus_csmapper.c : 1.6 121file lib/libc/citrus/citrus_pivot_factory.c : 1.5 122file lib/libc/inet/inet_cidr_ntop.c : 1.3 123file lib/libc/inet/inet_ntop.c : 1.3 124file lib/libc/stdio/vfwprintf.c : 1.8 125file libexec/ld.elf_so/arch/m68k/mdreloc.c : 1.20 126file libexec/ld.elf_so/arch/powerpc/ppc_reloc.c : 1.40 127file libexec/ld.elf_so/arch/sh3/mdreloc.c : 1.22 128file libexec/ld.elf_so/arch/sparc/mdreloc.c : 1.39 129file libexec/ld.elf_so/arch/sparc64/mdreloc.c : 1.39 130file libexec/ld.elf_so/arch/vax/mdreloc.c : 1.21 131file libexec/ld.elf_so/arch/x86_64/mdreloc.c : 1.27 132file sbin/fsck_ext2fs/dir.c : 1.19 133file sbin/routed/rtquery/rtquery.c : 1.18 134file sys/arch/amd64/amd64/pmap.c : 1.26 135file sys/arch/i386/pci/piixpcib.c : 1.4 136file sys/arch/m68k/m68k/pmap_motorola.c : 1.4 137file sys/crypto/cast128/cast128.c : 1.9 138file sys/ddb/db_command.c : 1.86 139file sys/dev/cardbus/cardbus_map.c : 1.21 140file sys/dev/fss.c : 1.25 141file sys/dev/ic/igsfb.c : 1.39 142file sys/dev/ic/mb86950.c : 1.5 143file sys/dev/ic/midway.c : 1.71 144file sys/dev/kttcp.c : 1.18 145file sys/dev/rasops/rasops_bitops.h : 1.9 146file sys/dev/pci/cmpci.c : 1.31 147file sys/dev/pci/machfb.c : 1.45 148file sys/dev/usb/ohci.c : 1.174 149file sys/dev/usb/uhci.c : 1.196 150file sys/dev/rasops/rasops_bitops.h : 1.9 151file sys/dist/ipf/netinet/ip_nat.c : 1.10 152file sys/dist/ipf/netinet/ip_rpcb_pxy.c : 1.8 153file sys/dist/pf/net/pf.c : 1.22 154file sys/fs/udf/udf_vnops.c : 1.4 155file sys/kern/kern_sig.c : 1.219 156file sys/kern/tty.c : 1.181 157file sys/net/bpf.c : 1.116 158file sys/net/zlib.c : 1.26 159file sys/netccitt/if_x25subr.c : 1.37 160file sys/netinet/in.c : 1.107 161file sys/netsmb/smb_smb.c : 1.27 162file sys/netsmb/smb_trantcp.c : 1.22 163file sys/nfs/nfs_serv.c : 1.108 164file sys/nfs/nfs_socket.c : 1.129 165file sys/nfs/nfs_syscalls.c : 1.91 166file sys/ufs/lfs/lfs_vfsops.c : 1.207 [also (char *)] 167file usr.bin/ftp/ftp.c : 1.140 168file usr.bin/find/function.c : 1.54 169file usr.bin/mail/tty.c : 1.20 170file usr.bin/msgc/msg_sys.def : 1.33-1.34 171file usr.bin/nl/nl.c : 1.7 172file usr.bin/systat/keyboard.c : 1.23 173file usr.bin/usbhidctl/usbhid.c : 1.29 174file usr.bin/vi/cl/cl_read.c : 1.5 175file usr.bin/vi/ex/ex_cscope.c : 1.12 176file usr.bin/vi/ex/ex_tag.c : 1.19 177file usr.bin/vi/vi/v_txt.c : 1.15 178file usr.sbin/altq/altqstat/qdisc_rio.c : 1.4 179file usr.sbin/cron/do_command.c : 1.19 180file usr.sbin/timed/timed/slave.c : 1.15 181descr 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. 190kcah 191 192hack gcc4 pointer sign and strict aliasing problems 193mdate 10 May 2006 194who mrg 195file bin/ed/Makefile : 1.33 196file distrib/utils/sysinst/Makefile.inc : 1.44 197file distrib/utils/x_dhclient/Makefile : 1.15 198file games/bcd/Makefile : 1.5 199file games/dab/Makefile : 1.5 200file games/larn/Makefile : 1.17 201file games/pom/Makefile : 1.5 202file lib/libasn1/Makefile : 1.26 203file lib/libcrypt/Makefile : 1.17 204file lib/libgssapi/Makefile : 1.16 205file lib/libhdb/Makefile : 1.20 206file lib/libkadm5clnt/Makefile : 1.21 207file lib/libkadm5srv/Makefile : 1.25 208file lib/libkrb5/Makefile : 1.35 209file lib/libssh/Makefile : 1.6 210file lib/libtelnet/Makefile : 1.26 211file libexec/getty/Makefile : 1.14 212file libexec/kadmind/Makefile : 1.19 213file libexec/kpasswdd/Makefile : 1.14 214file sbin/atactl/Makefile : 1.3 215file sbin/cgdconfig/Makefile : 1.7 216file sbin/clri/Makefile : 1.13 217file sbin/dkctl/Makefile : 1.4 218file sbin/dump/Makefile : 1.33 219file sbin/fdisk/Makefile : 1.35 220file sbin/fsck_ext2fs/Makefile : 1.11 221file sbin/fsck_ffs/Makefile : 1.29 222file sbin/fsdb/Makefile : 1.18 223file sbin/mount_smbfs/Makefile : 1.4 224file sbin/newfs/Makefile : 1.30 225file sbin/newfs_sysvbfs/Makefile : 1.2 226file sbin/restore/Makefile : 1.23 227file sbin/veriexecctl/Makefile : 1.11 228file sys/lib/libsa/Makefile : 1.59 229file sys/arch/evbarm/adi_brh/brh_machdep.c : 1.24 230file usr.bin/awk/Makefile : 1.9 231file usr.bin/crontab/Makefile : 1.24 232file usr.bin/ctags/Makefile : 1.8 233file usr.bin/gzip/Makefile : 1.10 234file usr.bin/ssh/sftp/Makefile : 1.10 235file usr.bin/ssh/ssh/Makefile : 1.25 236file usr.bin/vi/build/Makefile : 1.26 237file usr.bin/telnet/Makefile : 1.40 238file usr.bin/tn3270/tn3270/Makefile : 1.36 239file usr.bin/tr/Makefile : 1.4 240file usr.sbin/amd/amd/Makefile : 1.27 241file usr.sbin/amd/amq/Makefile : 1.14 242file usr.sbin/amd/libamu/Makefile : 1.20 243file usr.sbin/amd/pawd/Makefile : 1.5 244file usr.sbin/bind/Makefile.inc : 1.22 245file usr.sbin/bind/libdns/Makefile : 1.3 246file usr.sbin/bind/named/Makefile : 1.17 247file usr.sbin/bootp/bootptest/Makefile : 1.2 248file usr.sbin/chrtbl/Makefile : 1.6 249file usr.sbin/cron/Makefile : 1.12 250file usr.sbin/dhcp/Makefile.inc : 1.20 251file usr.sbin/dumplfs/Makefile : 1.11 252file usr.sbin/hprop/Makefile : 1.13 253file usr.sbin/installboot/Makefile : 1.35 254file usr.sbin/ipf/ipftest/Makefile : 1.32 255file usr.sbin/isdn/isdnd/Makefile : 1.6 256file usr.sbin/isdn/isdnmonitor/Makefile : 1.3 257file usr.sbin/isdn/isdntel/Makefile : 1.2 258file usr.sbin/isdn/isdntrace/Makefile : 126 259file usr.sbin/mopd/common/Makefile : 1.10 260file usr.sbin/mopd/mopd/Makefile : 1.9 261file usr.sbin/mopd/mopprobe/Makefile : 1.7 262file usr.sbin/makefs/Makefile : 1.17 263file usr.sbin/mscdlabel/Makefile : 1.5 264file usr.sbin/pkg_install/add/Makefile : 1.7 265file usr.sbin/pkg_install/create/Makefile : 1.5 266file usr.sbin/pkg_install/lib/Makefile : 1.28 267file usr.sbin/ntp/ntpd/Makefile : 1.10/1.11 268file usr.sbin/ntp/ntptime/Makefile : 1.4/1.5 269file usr.sbin/pppd/Makefile.inc : 1.3 270file usr.sbin/pppd/pppd/Makefile : 1.38 271file usr.sbin/rarpd/Makefile : 1.10 272file usr.sbin/rbootd/Makefile : 1.10 273file usr.sbin/rpc.pcnfsd/Makefile : 1.17 274file usr.sbin/rtadvd/Makefile : 1.9 275file usr.sbin/tcpdump/Makefile : 1.42 276file usr.sbin/wiconfig/Makefile : 1.3 277descr 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. 281kcah 282 283hack cross-building hack on Darwin 284mdate 20 July 2008 285who agc 286file src/distrib/common/Makefile.mdset : 1.33 287descr 288 Darwin has problems with getopt() when used in mdsetimage -v, 289 due to the difference between BSD and libiberty() getopt 290 implementations, more fully described in 291 http://mail-index.netbsd.org/current-users/2008/06/27/msg003242.html 292 and the subsequent thread. For just now, we just have an ugly 293 workaround not to call mdsetimage with the -v argument on Darwin 294kcah 295 296hack avoid rebuilding asn1 libraries 297mdate 03 August 2008 298who veego 299file src/crypto/dist/heimdal/lib/asn1/gen.c : 1.10 300file src/lib/libasn1/Makefile : 1.32 301file src/lib/libhdb/Makefile : 1.23 302file src/lib/libgssapi/Makefile : 1.20 303file src/lib/libhx509/Makefile : 1.3 304pr 9702 39185 305descr 306 asn1_compile does not check if generated header files do not have to 307 be rebuild. 308 Generate .hx files and copy it in the Makefiles if they changed. 309kcah 310 311hack avoid gcc4 -O1 bug in loop optimize 312cdate 29 November 2008 313who tsutsui 314file src/sbin/ifconfig/Makefile : 1.39 315pr 40036 40066 316descr 317 gcc -O1 seems to generate wrong code in loop optimize so that 318 ifconfig lo0 inet6 doesn't return error even if a kernel 319 doesn't have IPv6 support. (see the above PRs for details) 320 For workaround, specify -fno-loop-optimize on m68000, 321 which uses -O1 by default. 322kcah 323 324hack MKPIE ldscript for /usr.sbin/crash 325cdate 22 April 2010 326who christos 327file src/usr.sbin/crash/Makefile : 1.5 328file src/usr.sbin/crash/ldscript.crash : 1.1 329pr N/A 330descr 331 fixed in binutils-2.20.1. Linking with MKPIE=yes causes overlapping 332 sections 333kcah 334 335port vax 336 337 hack gcc4/vax ICE 338 cdate 339 who tsutsui 340 file sys/arch/vax/conf/Makefile.vax 341 descr 342 GCC4 on vax gets ICE on compiling sys/ddb/db_command.c. 343 -fno-tree-ter prevents it so add it to COPTS. 344 kcah 345 346 hack gcc4/vax compiler crash 347 cdate Fri Jun 30 22:39:12 PDT 2006 348 who mrg 349 file bin/csh/Makefile : 1.27 350 file lib/i18n_module/UTF7/Makefile : 1.2 351 descr 352 GCC4 on vax crashes. -O0 stops it happening so far... 353 kcah 354 355 hack gcc 2.95/vax doesn't like abort being used as function pointer 356 cdate Tue Dec 13 05:54:50 GMT 2005 357 who jmc 358 file lib/libc/rpc/svc_vc.c 1.15 359 descr 360 Provide a local definition for abort which doesn't include 361 the noreturn attribute which trips up gcc 2.95 on vax. 362 kcah 363 364 hack gcc 2.95/vax doesn't have stdbool.h and gettext needs it 365 cdate Mon May 9 12:16:22 CDT 2005 366 who jmc 367 file gnu/usr.bin/gettext/Makefile.inc.prog 1.5 368 gnu/usr.bin/gettext/libgrep/Makefile 1.3 369 gnu/usr.bin/gettext/libnlspr/Makefile 1.5 370 gnu/usr.bin/gettext/libnlsut/Makefile 1.3 371 descr 372 The latest gettext assumes a C99 environment or at least 373 configure checks to work around this. As we don't use configure 374 provide a stdbool.h for vax builds locally in directories from 375 the template provided by the gettext code. 376 kcah 377 378 hack gcc 2.95/vax cannot handle __builtin_ffs() 379 cdate Fri Aug 23 21:31:15 CEST 2002 380 who ragge 381 file sys/lib/libkern/libkern.h : 1.42 382 descr 383 __builtin_ffs() is ifdef'd away if __vax__. Matt Thomas has 384 added this feature to GCC 3 so it can be removed when switching. 385 kcah 386 387 hack gcc 2.95/vax libbz2 388 mdate 27 Jun 2002 389 who thorpej 390 file lib/libbz2/Makefile 391 descr 392 libbz2 is mis-compiled with optimization with GCC 2.95.3 393 on VAX. -O0 works around this problem. 394 kcah 395 396 hack vax Toolchain bug 397 cdate 28 Mar 2003 398 who he 399 file sys/arch/vax/vax/intvec.S : 1.5 400 descr 401 Workaround for PR toolchain/20924. The assembler apparently 402 tries to range-check byte offsets when it doesn't have 403 sufficient information to make that decision. 404 Workaround uses `brw' instead of `brb' instruction. 405 kcah 406 407 hack vax gcc 2.95.3 -Wuninitialized workarounds 408 cdate 6 Nov 2003 409 who he 410 file sys/dev/bi/if_ni.c : 1.22 411 file sys/arch/vax/vax/ctu.c : 1.20 412 descr 413 Workaround for gcc 2.95.3 failing to detect that certain 414 variables will be initialized; so that this code compiles 415 with -Wuninitialized. Should be reviewed and possibly 416 reverted when gcc 3.3.2 is ready for vax. 417 kcah 418 419 hack vax gcc 2.95.3 structure initialization 420 cdat 13 May 2004 421 who cl 422 file sys/miscfs/kernfs/kernfs_vnops.c : 1.104 423 descr 424 Workaround for gcc 2.95.3 failing to initialize structures 425 and/or unions inside structures using nested designators. 426 Should be reverted when gcc >=3.3.3 is ready for vax. 427 kcah 428 429 hack vax gcc 2.95.3 needs -I. to build nslexer.c 430 cdat 6 Jun 2004 431 who mhitch 432 file lib/libc/arch/vax/Makefile.inc : 1.6 433 descr 434 It appears necessary to add -I. to CPPFLAGS when building 435 nslesxer.c. This may be caused by gcc 2.95.3 being used. 436 Should be reverted when a newer gcc is ready for vax. 437 kcah 438 439 hack vax gcc 2.95.3 doesn't understand "-std=c99" 440 cdat 5 April 2005 441 who tron 442 file src/share/mk/bsd.sys.mk 443 descr 444 We cannot use "-std=c99" for compiler warning level 4 and above 445 because gcc 2.95.3 doesn't support that option. 446 kcah 447 448 hack declare boolean_t in two IPF user-mode programs 449 cdate Tue Mar 7 19:19:20 CET 2006 450 who he 451 file dist/ipf/ipsend/iptests.c : 1.8 452 dist/ipf/ipsend/sock.c : 1.7 453 descr 454 The IPF user-mode programs ipsend and iptest first 455 include <sys/types.h> without _KERNEL defined, and 456 later include <sys/file.h> with _KERNEL defined. 457 This causes a build failure when building for vax, 458 since <sys/device.h> ends up being included without 459 bollean_t being defined by <sys/types.h>. 460 Build failure and further details documented in 461 PR#32907. 462 kcah 463 464 hack pcc 0.9.9 large string literals 465 cdat 8 July 2008 466 who gmcgarry 467 file sys/conf/param.c : 1.58 468 descr 469 Workaround for pcc 0.9.9 not handling large string literals 470 which causes kernels with 'options INCLUDE_CONFIG_FILE' to 471 fail compilation. 472 There is a proposal on the pcc mailing list to stuff config 473 file in ELF section. 474 kcah 475 476 hack xorg warnings 477 cdat 30 July 2008 478 who mrg 479 file external/mit/xorg/lib/libSM/Makefile : 1.2 480 external/mit/xorg/lib/libX11/Makefile.libx11 : 1.2 481 external/mit/xorg/lib/libXext/Makefile : 1.2 482 external/mit/xorg/lib/libXfont/Makefile : 1.2 483 descr 484 Disable several warnings or use -Wno-error across Xorg sources 485 while we get them working 486 kcah 487 488 hack 32 bit time leftovers 489 cdat 11 January 2009 490 who christos 491 file lib/libc/time/localtime.c : 1.41 492 lib/libc/time/zic.c : 1.23 493 descr 494 The timezone compiled files still contain 32 bit time_t 495 quantities. I did not want to version the files because 496 the ``parser'' is too ugly for words. What needs to be 497 done, is to rewrite the parser from scratch also to avoid 498 potential core-dumps from parsing invalid files. 499 kcah 500 501 hack 32 bit time leftovers 502 cdat 11 January 2009 503 who christos 504 file various 505 descr 506 Many filesystem on-disk formats have 32 bit times. 507 kcah 508 509port arm 510 511 hack gcc-unsigned-compare 512 cdate 09 Mar 2002 513 mdate 18 Mar 2002 514 who bjh21 515 file dist/bind/lib/nameser/ns_parse.c : 1.3 516 file dist/dhcp/minires/ns_parse.c : 1.3 517 file dist/dhcp/omapip/result.c : 1.2 518 file dist/dhcp/server/failover.c : 1.3 519 file gnu/dist/toolchain/bfd/bfd.c : 1.2 520 file gnu/dist/toolchain/bfd/format.c : 1.2 521 file gnu/dist/toolchain/gdb/target.c : 1.2 522 file sys/kern/vfs_subr.c : 1.172 523 descr When checking that a potentially-unsigned enum is >= 0, assign 524 it to an int first. This is necessary to avoid "comparison is 525 always true" warnings with -fshort-enums. Casting to an int 526 really should be enough, but turns out not to be. 527 kcah 528 529 530port sh3 531 532 hack gcc4-sh3-bz2 533 cdate Sun May 21 03:34:57 UTC 2006 534 mdate Fri May 16 13:13:00 UTC 2008 535 who mrg, tsutsui 536 file lib/libbz2/Makefile : 1.10 537 descr 538 The in-tree GCC 4.1-based compiler generated too-far 539 pc-relative addresses. Hack is to build with 540 -fno-loop-optimize. 541 kcah 542 543 544port m68000 545 546 hack gcc4-m68000 547 cdate Fri Feb 8 10:29:37 PST 2008 548 mdate Sun May 4 15:37:19 UTC 2008 549 who mrg, tsutsui 550 file rescue/Makefile : 1.21 551 file sbin/dump_lfs/Makefile : 1.9 552 file sbin/fsck_ffs/Makefile : 1.35 553 file sbin/fsdb/Makefile : 1.22 554 file share/mk/sys.mk : 1.96 555 file usr.sbin/ndbootd/Makefile : 1.5 556 descr 557 Several internal compiler errors with gcc -O1 558 around 64bit integer arithmetic. 559 This hack uses -O1 and adds some -fno-tree-foo options 560 to avoid the problem. 561 This might be related with GCC Bugzilla Bug 32424. 562 kcah 563 564 565port sparc 566 567 hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3 568 cdate Sun Aug 14 19:26:48 PDT 2011 569 who mrg 570 file sys/arch/sparc64/sparc/cpu.c : 1.234 571 file sys/arch/sparc64/sparc/cpuvar.h : 1.90 572 file sys/arch/sparc64/sparc/genassym.cf : 1.67 573 file sys/arch/sparc64/sparc/locore.s : 1.265 574 descr 575 Something is wrong with GCC 4.5.3 and the savefpstate IPI. 576 Post newlock2 there was a bug where a lock was reduced from 577 IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI 578 would crash due to NULL IPI. This was fixed by re-using the 579 right IPL value. However, GCC 4.5.3 build kernels have the 580 same problems. For now, the hack is re-instated. 581 kcah 582 583 584port sparc64 585 586 hack disable optimzations for uvm_bio.c on 32 bit kernels 587 cdate Sun Mar 21 14:14:04 MET 2004 588 who martin 589 file sys/arch/sparc64/conf/Makefile.sparc64 : 1.53-1.54 590 file sys/arch/sparc64/conf/files.sparc64 : 1.93 591 descr 592 The sparc compiler miscompiles uvm_bio.c when using 593 any optimization. This results in ubc_release panics. 594 kcah 595 596 597port mips 598 599 hack mips-shared-linker-load-address 600 cdate Fri Oct 7 08:33:10 UTC 2005 601 who simonb 602 file src/sys/kern/exec_elf32.c : 1.107 603 descr 604 With COMPAT_16 or previous enabled (which enables 605 ELF_INTERP_NON_RELOCATABLE) a recent ld.elf_so will 606 load and run at address 0. The check to fix this in 607 rev 1.107 only checks the first psection of the ELF 608 executable, which may not be loadable. A more correct 609 fix is to check the first loadable psection instead of 610 just the first psection. 611 kcah 612 613 hack mips-duplicate-ras-end-label 614 cdate Sat Sep 2 23:29:42 2006 615 who martin 616 file src/regress/sys/kern/ras/ras3/Makefile : 1.3 617 descr 618 Add -fno-reorder-blocks to CFLAGS to avoid duplicate 619 labels by duplicated __asm output from RAS_END() 620 macro. 621 kcah 622 623 hack mips-mcount-assembler-warning 624 cdate Tue Jul 29 14:16:52 UTC 2008 625 who lukem 626 file src/lib/libc/gmon/Makefile.inc : 1.8 627 descr 628 Workaround for PR port-mips/39192. 629 common/lib/libc/gmon/mcount.c generates a (fatal) 630 assembler warning on MIPS: 631 Warning: No .cprestore pseudo-op used in PIC code 632 Add COPTS.count.c+=-Wa,--no-warn to avoid -Wa,--fatal-warnings 633 kcah 634 635port i386 636 637 hack use volatile intermediate variable to enforce rounding 638 cdate Tue Aug 1 22:15:55 MEST 2006 639 who drochner 640 file src/lib/libm/src/lrintf.c : 1.4 641 file src/lib/libm/src/s_rintf.c : 1.8 642 descr 643 gcc-4 does subsequent operations on "float" values within 644 the i387 FPU without rounding the intermediate results 645 kcah 646 647port powerpc 648 649 hack avoid using __builtin_return_address(0) because it fails in 650 Xorg's module loader 651 cdate Sat Sep 27 03:52:05 UTC 2008 652 who macallan 653 file src/libexec/ld.elf_so/rtld.c : 1.121 654 descr 655 workaround for PR port-macppc/37812 656 kcah 657 658 hack define TARGET_SECURE_PLT and HAVE_AS_TLS because when 659 building the native compiler via build.sh those don't defined 660 properly. 661 cdate Sat Mar 12 08:00:00 UTC 2011 662 who matt 663 file src/gnu/dist/gcc4/gcc/config/rs6000/netbsd.h 664 descr 665 see above 666 kcah 667