TODO.compat-module revision 1.5.2.2
1 1.5.2.2 christos /* $NetBSD: TODO.compat-module,v 1.5.2.2 2019/06/10 21:42:38 christos Exp $ */ 2 1.5.2.2 christos 3 1.5.2.2 christos DONE 4 1.5.2.2 christos ---- 5 1.5.2.2 christos 1. Removed the building of the compat library - it is no longer needed. 6 1.5.2.2 christos 7 1.5.2.2 christos 2. Reverted some intentional auto-load breakage for loading the sysv_ipc 8 1.5.2.2 christos module; the breakage was introduced as the fix for a build break. 9 1.5.2.2 christos 10 1.5.2.2 christos 3. Split the sysv_ipc compat routines into their own compat_sysv module. 11 1.5.2.2 christos 12 1.5.2.2 christos 4. Resolved some inter-module dependencies. 13 1.5.2.2 christos 14 1.5.2.2 christos 5. Extracted some net/if.c compat routines into the compat module, and 15 1.5.2.2 christos replaced the originals with indirect (vectored) function calls. 16 1.5.2.2 christos 17 1.5.2.2 christos 6. Reconfirmed existing compat-module dependencies, and update the 18 1.5.2.2 christos defopt/defflag lines in the config files* as needed, to insure that 19 1.5.2.2 christos built-in dependencies get resolved. 20 1.5.2.2 christos 21 1.5.2.2 christos 7. Fixed limits on the number of module dependencies and maximum 22 1.5.2.2 christos recursion level (for auto-loading) have been removed. Previous code 23 1.5.2.2 christos for reporting module status to userland has been versioned and moved 24 1.5.2.2 christos to the (new) compat_80 module. 25 1.5.2.2 christos 26 1.5.2.2 christos 8. The old monolithic compat module has been broken into multiple 27 1.5.2.2 christos modules, one for each old NetBSD version. The monolithic compat 28 1.5.2.2 christos module is no longer available. 29 1.5.2.2 christos 30 1.5.2.2 christos Similarly, the compat_sysv and compat_netbsd32 modules have also 31 1.5.2.2 christos been split into several version-specific modules, and the mini- 32 1.5.2.2 christos monolithic versions of these modules are no longer provided. 33 1.5.2.2 christos 34 1.5.2.2 christos 9. syscalls.master has been updated to autoload the version-specific 35 1.5.2.2 christos compat modules rather than the monolithic modules. 36 1.5.2.2 christos 37 1.5.2.2 christos 10. Separated COMPAT_BSDPTY stuff, allowing the COMPAT_60 module to be 38 1.5.2.2 christos built regardless. 39 1.5.2.2 christos 40 1.5.2.2 christos 11. Implemented a MP-safe mechanism for installing and removing function 41 1.5.2.2 christos pointers, preventing them from being unloaded (via modunload) while 42 1.5.2.2 christos in use. Thanks to riastradh@ for the template code. 43 1.5.2.2 christos 44 1.5.2.2 christos 12. Finished splitting the vnd_30 and vnd_50 compat code into separate 45 1.5.2.2 christos modules. 46 1.5.2.2 christos 47 1.5.2.2 christos 13. Cleaned up some previous vectored routines (related to if_43.c) to 48 1.5.2.2 christos use the MP-safe mechanism. 49 1.5.2.2 christos 50 1.5.2.2 christos 14. Organized (some of) the netbsd32 machine-dependent code to fit a 51 1.5.2.2 christos common build framework, and split version-specific code from baseline 52 1.5.2.2 christos code as needed. More work may be needed here (see #18 below). 53 1.5.2.2 christos 54 1.5.2.2 christos 15. The rtsock.c code has been split into two separate source files, 55 1.5.2.2 christos one for use in -current and one which is shared with COMPAT_50 (the 56 1.5.2.2 christos code is shared with -current, but macros are used to define version- 57 1.5.2.2 christos specific routine names and variable types). Version-specific parts 58 1.5.2.2 christos of rtsock.c for compat_14 and compat_70 have also been split out and 59 1.5.2.2 christos included in the relevant version-specific compat modules. 60 1.5.2.2 christos 61 1.5.2.2 christos TODO - Not required for branch merge 62 1.5.2.2 christos ------------------------------------ 63 1.5.2.2 christos 16. Audit the entire code base for any remaining embedded #ifdef's for 64 1.5.2.2 christos COMPAT_xx. When found, move the actual compat code into the compat 65 1.5.2.2 christos hierarchy and replace originals with indirect (vectored) calls. 66 1.5.2.2 christos 67 1.5.2.2 christos 17. The compat_60 module still needs some work for XEN systems. We 68 1.5.2.2 christos probably need some build infrastructure changes to ensure that 69 1.5.2.2 christos XEN (and, for i386, XEN-PAE) modules are build with the correct 70 1.5.2.2 christos macros defined and with -I directories specified in the same order 71 1.5.2.2 christos as for building kernels. See PR port-xen/53130. This currently 72 1.5.2.2 christos prevents loading of micro-code updates for amd64 processors running 73 1.5.2.2 christos XEN kernels. This limitation also exists on HEAD. 74 1.5.2.2 christos 75 1.5.2.2 christos 18. There seems to be quite a bit of MD compat_xx code, in the various 76 1.5.2.2 christos sys/arch/ directories. I haven't yet looked at any of this. But it 77 1.5.2.2 christos seems to me that the MI compat build infrastructure should have some 78 1.5.2.2 christos mechanism to "reach over" to the MD code, #include a Makefile.inc file, 79 1.5.2.2 christos and perhaps define something to enable the MI modcmd code to call a 80 1.5.2.2 christos compat_xx_MD_init() routine. 81 1.5.2.2 christos 82 1.5.2.2 christos Note also that there are a few bits of MD code that is COMPAT_44 83 1.5.2.2 christos related. (The only bit of MI COMPAT_44 code is in the single module 84 1.5.2.2 christos shared by COMPAT_43 and COMPAT_09.) This affects the cesfic, hp300, 85 1.5.2.2 christos news68k, and x68k platforms, all in their respective machdep.c 86 1.5.2.2 christos source file. Additionally, the zaurus platform defines COMPAT_44 in 87 1.5.2.2 christos its INSTALL kernel configuration - but no other configuration files! 88 1.5.2.2 christos 89 1.5.2.2 christos As far as I can tell, none of the MD compat code is currently built 90 1.5.2.2 christos into the monolithic COMPAT module on HEAD. Thus, its absence from 91 1.5.2.2 christos any of the version-specific modules is not a regression. 92 1.5.2.2 christos 93 1.5.2.2 christos 19. For compat_50, there are some things in dev/gpio and dev/wscons/wsmux 94 1.5.2.2 christos that I haven't been able to cleanly separate. These items are not 95 1.5.2.2 christos currently included in the monolithic COMPAT module on HEAD, so lack of 96 1.5.2.2 christos integration on the branch is not a regression. 97 1.5.2.2 christos 98 1.5.2.2 christos 20. Find all the remaining dependencies on the compat_utils routines and 99 1.5.2.2 christos deal with them appropriately. For now, we simply ensure that they 100 1.5.2.2 christos are included in every kernel via 'options COMPAT_UTILS' in file 101 1.5.2.2 christos sys/conf/std 102 1.5.2.2 christos 103 1.5.2.2 christos 21. The netbsd32_machine32_hook should be moved out of the main kernel 104 1.5.2.2 christos and into the compat_netbsd32 module. Unfortunately there are some 105 1.5.2.2 christos machines which include the consumer of this hook but do not have a 106 1.5.2.2 christos compat_netbsd32 module (specifically, i386 and sgimips). This 107 1.5.2.2 christos should be sorted out sometime soon, but does not block merging. 108 1.5.2.2 christos 109 1.5.2.2 christos 22. Note that the MPSAFE kernel option is currently not specified for 110 1.5.2.2 christos building modules, nor is it included in any standard kernel 111 1.5.2.2 christos configuration files. If you build a custom kernel with the MPSAFE 112 1.5.2.2 christos option set, and you also use modules (especially those modules for 113 1.5.2.2 christos network interface device drivers), you'll need to build custom 114 1.5.2.2 christos modules, too. The MPSAFE stuff needs to be extracted out and made 115 1.5.2.2 christos into "hooks". 116 1.5.2.2 christos 117 1.5.2.2 christos 23. The raidframe-netbsd32 compat code needs to be better separated 118 1.5.2.2 christos from the main raidframe module. The current mechanism requires us 119 1.5.2.2 christos to include compat/netbsd32/netbsd32.h in rf_netbsdkintf.c to get 120 1.5.2.2 christos various structure definitions. This should all be handled in the 121 1.5.2.2 christos compat module, but requires that the code in the ioctl switch be 122 1.5.2.2 christos moved into a function so the compat code can call it directly and 123 1.5.2.2 christos handle the ioctl commands entirely. 124
Indexes created Sat May 16 00:24:39 UTC 2026