TODO.compat-module revision 1.1.2.8
1 /* $NetBSD: TODO.compat-module,v 1.1.2.8 2018/09/21 02:53:00 pgoyette Exp $ */ 2 3 DONE 4 ---- 5 1. Returned the build to use a .a compat library rather than a .o 6 library. The original method used was .a but that was changed 7 (fairly recently) as a work-around to address some support 8 routines that were not being included when needed. These support 9 modules are now included in their own module, and the work-around 10 is therefore no longer needed. 11 12 2. Reverted some intentional auto-load breakage for loading the sysv_ipc 13 module; the breakage was introduced as the fix for the above-mentioned 14 build breakage. 15 16 3. Split the sysv_ipc compat routines into their own compat_sysv module. 17 18 4. Resolved some inter-module dependencies. 19 20 5. Extracted some net/if.c compat routines into the compat module, and 21 replaced the originals with indirect (vectored) function calls. 22 23 6. Reconfirmed existing compat-module dependencies, and update the 24 defopt/defflag lines in the config files* as needed, to insure that 25 built-in dependencies get resolved. 26 27 7. Fixed limits on the number of module depedencies and maximum 28 recursion level have been removed. Previous code for reporting 29 module status to userland has been versioned and moved to the 30 compat_80 module. 31 32 8. The old monolithic compat module has been broken into multiple 33 modules, one for each old NetBSD version. The monolithic module 34 is no longer available. 35 36 Similarly, the compat_sysv module has also been split into several 37 version-specific modules, and the mini-monolithic compat_sysv module 38 is no longer provided. 39 40 9. syscalls.master has been updated to autoload the version-specific 41 compat modules rather than the monolithic modules. 42 43 10. Separated COMPAT_BSDPTY stuff, allowing the COMPAT_60 module to be 44 built regardless. 45 46 11. Implemented a MP-safe mechanism for installing and removing function 47 pointers. Thanks to riastradh@ for the template code. 48 49 12. Replace version-specific parts of the compat_netbsd32 module (and 50 also the compat_netbsd32_sysv module) with individual modules. Update 51 dependencies accordingly. (Done, but see #13 below.) 52 53 13. Finished splitting the vnd_30 and vnd_50 compat code into separate 54 modules. 55 56 14. Cleaned up some previous vectored routines (related to if_43.c) to 57 use the MP-safe mechanism. 58 59 60 TODO - Required for branch merge 61 -------------------------------- 62 15. Need to finish cleaning up the netbsd32 machine-dependent code, since 63 the MI code assumes that there's MD file available. 64 65 16. The ieee_80211 compat code needs to be verified to make sure it is 66 handling the if43_20 compat routine cvtcmd() correctly. 67 68 17. There are a few function pointers in netbsd32 module that need to 69 be converted to the new MP-safe mechanism. See files 70 netbsd32_mod.c 71 netbsd32_module.c 72 netbsd32_compat_80.[ch] 73 amd64's machdep.c and machdep_16.c 74 75 76 TODO - Not required for branch merge 77 ------------------------------------ 78 18. Audit the entire code base for any remaining embedded #ifdef's for 79 COMPAT_xx. When found, move the actual compat code into the compat 80 hierarchy and replace originals with indirect (vectored) calls. 81 82 19. The rtsock compat code is a disaster, with rtsock_50.c #include-ing 83 the main rtsock.c code with various manipulations of the COMPAT_50 84 macro. Once rtsock is separated, compat_14 references to rtsock_50 85 routines needs to be verified. 86 87 Currently, this entire code is built for the monolithic COMPAT 88 module, but there's no way to reach the entry points, so none of 89 the compat code can be executed, neither on the branch nor on 90 HEAD. 91 92 20. The compat_60 module still needs some work for XEN systems. We 93 probably need some build infrastructure changes to ensure that 94 XEN (and, for i386, XEN-PAE) modules are build with the correct 95 macros defined and with -I directories specified in the same order 96 as for building kernels. See PR port-xen/53130. This currently 97 prevents loading of micro-code updates for amd64 processors running 98 XEN kernels. This limitation also exists on HEAD. 99 100 21. There seems to be quite a bit of MD compat_xx code, in the various 101 sys/arch/ directories. I haven't yet looked at any of this. But it 102 seems to me that the MI compat build infrastructure should have some 103 mechanism to "reach over" to the MD code, #include a Makefile.inc file, 104 and perhaps define something to enable the MI modcmd code to call a 105 compat_xx_MD_init() routine. 106 107 Note also that there are a few bits of MD code that is COMPAT_44 108 related. (The only bit of MI COMPAT_44 code is in the single module 109 shared by COMPAT_43 and COMPAT_09.) This affects the cesfic, hp300, 110 news68k, and x68k platforms, all in their respective machdep.c 111 source file. Additionally, the zaurus platform defines COMPAT_44 in 112 its INSTALL kernel configuration - but no other configuration files! 113 114 As far as I can tell, none of the MD compat code is currently built 115 into the monolithic COMPAT module on HEAD. Thus, its absence from 116 any of the version-specific modules is not a regression. 117 118 22. For compat_50, in addition to rtsock there are some things in dev/gpio 119 and dev/wscons/wsmux that I haven't been able to cleanly separate. 120 These items are not currently included in the monolithic COMPAT module 121 on HEAD, so lack of integration on the branch is not a regression. 122 123 23. Even though the build mechanism has been switched back to using a 124 .a compat library, it might be useful to make it work with the .o 125 library. 126 127
Indexes created Sat May 16 00:24:39 UTC 2026