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David 1d67426ede feat(libSceLibcInternal): implement getopt and getopt_long

Export getopt (VUtibKJCt1o) and getopt_long (8VVXJxB5nlk) from
libSceLibcInternal together with the guest variables optind
(zCnSJWp-Qj8), optarg (zG0BNJOZdm4), opterr (yaFXXViLWPw), optopt
(FwzVaZ8Vnus) and optreset (CZNm+oNmB-I). The NIDs were computed with
tools/nid_names.py and all seven are in aerolib; the PS5 payload SDK
f5d40f02 lists the functions and the five objects in
sce_stubs/libSceLibcInternal.c.

Titles (predicted stops from registry order, not observed runs):
- XPSemu PPSA97358, after execv/execve, the signal waits, the
  credential setters, mlockall and tcsendbreak:
  "FAIL: unresolved ELF import VUtibKJCt1o from libSceLibcInternal.prx"
  (getopt idx 204, 10 call sites from 0xF6C23D), then optind (207),
  optreset (208), optarg (209).
- RetroArch PPSA99169: getopt_long (idx 554, call sites 0xD2FC0C,
  0xD3002A), optind (553), optarg (555).

Behaviour follows FreeBSD release/11.4.0 8c639945: getopt is
lib/libc/stdlib/getopt.c (no permutation, GNU "::" optional argument,
lone "-" as an option when listed), getopt_long is getopt_internal
from lib/libc/stdlib/getopt_long.c with GNU_COMPATIBLE (permutation,
POSIXLY_CORRECT read through the guest getenv on the first call and on
optreset, "+" and "-" prefixes, "W;", optind 0 as a reset, abbreviation
and ambiguity rules and the GNU warning texts). Warnings are written to
the guest stderr stream as "<__progname>: <message>", as warnx does.
The struct option layout and argument kinds are include/getopt.h.
The code lives in libSceLibcInternal because __progname is a libkernel
export that libc cannot link.

A null getopt option string, a null argument vector or argument, a
negative optind and an optind moved inside a pending permutation throw
where FreeBSD faults. getopt_long_only is not exported.

guest_getopt runs the FreeBSD getopt_test cases (contrib/netbsd-tests
t_getopt.sh with the h_getopt and h_getopt_long result format) plus
grouped and optional arguments, "--", permutation order, "+" and "-"
prefixes, optreset and optind 0 restarts, POSIXLY_CORRECT, all three
long argument kinds, abbreviations, ambiguity, flag pointers, "W;",
optopt with opterr 0 and the exact stderr text.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
(cherry picked from commit a2740166d93920c301e1add23ceea762b4acad27)

2026-10-12 18:46:43 +00:00

3.5 KiB

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libSceLibcInternal technical debt

Unknown function info

_sceLibcInternalThreadAtexit, _sceLibcInternalThreadDtors (libSceLibcInternal) - FreeBSD __cxa_thread_atexit semantics assumed; a null or non-image destructor and an allocation failure throw
_sceLibcInternalForceTlsDestructor (libSceLibcInternal) - behaviour follows sceLibcForceTlsDestructor(int) in a title's libc.prx (disassembly): the calling thread's destructors whose dso belongs to the module run newest first, only if the dso's module is loaded and the dso points to itself, in up to 4 passes. The return type is unknown (that function returns nothing), 0 is returned. The module of each dso is looked up when the destructors are forced, not when they are registered as libc.prx does

Functional

makecontext (libSceLibcInternal) follows FreeBSD 11's lib/libc/amd64/gen/makecontext.c: at most six arguments, a stack of at least MINSIGSTKSZ (2048) bytes, and exit(0) when the function returns with no uc_link. The console's version is not verified
makecontext (libSceLibcInternal) on Windows pins its stack writable until a later makecontext stack overlaps it, since nothing tells the library when the guest frees the stack
Thread exit destructors (libSceLibcInternal) run when a libkernel thread finishes; on the main or a host thread only _sceLibcInternalThreadDtors runs them, as exit does, else they are dropped
fstatvfs (libSceLibcInternal) converts _fstatfs to the 88-byte struct statvfs as FreeBSD 9.2's sfs2svfs does (f_bsize from the transfer size, f_frsize from the block size, f_favail equal to f_ffree, f_fsid 0, ST_RDONLY and ST_NOSUID only). Differences: f_namemax is the statfs value, not fpathconf(_PC_NAME_MAX); negative f_bavail and f_ffree wrap to unsigned without EOVERFLOW, as the same-width copy in FreeBSD does; inode counts are 0 on Windows, inherited from _fstatfs; a null output returns EFAULT after the descriptor is validated, where FreeBSD would fault. Layout and conversion are unverified against the PS5 library (PS5MC imports fstatvfs but was not run)
getopt, getopt_long (libSceLibcInternal) follow FreeBSD 11 getopt.c and getopt_long.c with GNU_COMPATIBLE: getopt does not permute, getopt_long permutes unless POSIXLY_CORRECT is set in the guest environment or the option string starts with +, and the exported opterr, optind, optopt, optreset and optarg start at 1, 1, 0, 0 and null. Warnings go to the guest's current stderr prefixed with __progname, where FreeBSD's warnx keeps the stderr of its first call. A null getopt option string, a null argument vector or argument, a negative optind and an optind moved inside a pending permutation throw where FreeBSD faults. getopt_long_only is not exported. That the console's libSceLibcInternal uses this FreeBSD code is unverified

3.5 KiB Raw Blame History

libSceLibcInternal technical debt

Unknown function info

Functional

3.5 KiB

Raw Blame History