libk  Diff

Differences From Artifact [51b8ad36cd]:

• File arch/readme.md — part of check-in [312e446cfc] at 2019-08-25 03:55:01 on branch trunk — remove useless script, delete junk files, credit contributors, add documentation for typesize.c (user: lexi, size: 2525) [annotate] [blame] [check-ins using]

To Artifact [45fed8e393]:

• File arch/readme.md — part of check-in [ceed477743] at 2019-08-29 06:41:11 on branch trunk — arch: rewrite and merge mktbl scripts for Linux These now use the kernel’s own build system to generate headers and extract information from them. (user: lachs0r, size: 1955) [annotate] [blame] [check-ins using]

     5      5   
     6      6   ## structure
     7      7   each subdirectory should be named for a specific target tuple. the top level is reserved for development tools and files of relevance to more than one architecture; for instance, the standardized x86-64 SysV syscall ABI is kept at `/arch/x86.syscall.64.s`. these files should not be included directly from any files under the `/mod` directory; rather, they should be included from stub files in the appropriate target directory. this provides a consistent header selection mechanism.
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     9      9   ## scripts
    10     10   arch contains a number of shell scripts. unlike the shell scripts in /global, the shell scripts in /arch are not part of the build process; they are simply developer tools, usually for generating syscall tables for new architectures. the output of the scripts is written directly to the appropriate target directory; these files should be added to the source tree and committed.
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    12         -- `mktbl.posix.sh <target> <ABI>`: generates the C headers for a particular target based on the system_calls.h and error_table.h files in its directory. the ABI parameter controls which syscalls are included; the ABI is the second column in the kernel system calls table.
    13         -- `mktbl.linux.errno.sh <target> <ABI>`: generates the errno table for a given architecture and ABI. requires the kernel source tree to be installed on the host system.
    14         -- `mktbl.linux.syscall.sh <target> <ABI>`: generates the syscall table for a given architecture and ABI. requires the kernel source tree to be installed on the host system. note that some architectures like x86 have separate, architecture-specific tables. this script is not meant to be used with these architectures.
           12  +- `mktbl.linux.sh <target> <arch> <ABI>`: generates the Linux errno and syscall tables for a given architecture and ABI. requires the kernel source tree to be installed on the host system.
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    16     14   ## sources
    17     15   the arch directory also contains C sources for programs that need to be compiled *and* executed during the build process.
    18     16   
    19     17   - `typesize.c`: calculates type metadata for the system it is compiled on, producing macros needed for the creation of `<k/type.h>` (mod/kcore/type.h.m).