CVS commit: src/libexec/ld.elf_so

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Fri May  2 23:05:11 UTC 2025

Modified Files:
        src/libexec/ld.elf_so: Makefile

Log Message:
ld.elf_so(1): Skip the ctype(3) guard pages.

These came in via libc_pic.a.  They aren't very useful because
nothing mprotects them in ld.elf_so -- ld.elf_so ignores its own
constructors.  We could fill them with gibberish in a feeble attempt
to highlight ctype(3) abuse...or we could just audit ld.elf_so and
save on the memory by.

This uses a .PATH.c reachover for the ctype_.c file rather than
pulling ctype_.pico out of libc_pic.a.

Sampling of space savings:

(amd64)
$ size ld.elf_so.{before,after}/ld.elf_so
   text    data     bss     dec     hex filename
  81168    2456    1928   85552   14e30 ld.elf_so.before/ld.elf_so
  65068    2408    1928   69404   10f1c ld.elf_so.after/ld.elf_so

(mips64)
$ size ld.elf_so.{before,after}/ld.elf_so
   text    data     bss     dec     hex filename
 131729     752    1408  133889   20b01 ld.elf_so.before/ld.elf_so
  73185     748    1408   75341   1264d ld.elf_so.after/ld.elf_so

(alpha)
$ size ld.elf_so.{before,after}/ld.elf_so
   text    data     bss     dec     hex filename
 113893    1096    1860  116849   1c871 ld.elf_so.before/ld.elf_so
  79680    1048    1860   82588   1429c ld.elf_so.after/ld.elf_so

20-50% reduction in ld.elf_so size isn't too shabby (except this was
all just bloat I had inadvertently caused last month, oops).

PR lib/58208: ctype(3) provides poor runtime feedback of abuse


To generate a diff of this commit:
cvs rdiff -u -r1.150 -r1.151 src/libexec/ld.elf_so/Makefile

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.