On the console a title whose param.json declares downloadDataSize finds
/download0 mounted from the start. The host directory was only created
by sceAppContentDownloadDataGetAvailableSpaceKb, so a title that opens
files there directly got ENOENT. libkernel now creates it when it loads,
reading only the run directory's param.json, without resolving guest
paths, so the libc path root is still fixed at first use.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
sceAppContentAppParamGetInt numbers the SKU flag 0 and
USER_DEFINED_PARAM_1..4 as 1..4 (fpPS4 ps4_libsceappcontent). Id 1
returned the SKU flag and 2..5 returned zero. UFC 6 (PPSA23566) checks
that param 1 is its title number, userDefinedParam1 in param.json, and
crashes otherwise. Absent params read as zero.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A PS5 param.json keeps defaultLanguage inside localizedParameters, next to
the language entries. The parser looked for it at the root only, then fell
back to en-US and to the first member, which is the defaultLanguage string
when no en-US entry exists (PPSA12544 has only en-GB), and threw
"expected JSON object". defaultLanguage is now read from
localizedParameters first, and the fallback takes the first language
object.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Only the lines this branch added lose their comments; the commits before
keep them, with the reasoning behind each change, for whoever digs into
that code later.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
libkernel:
- direct memory keeps its contents per physical page across unmap and
remap; a page mapped at two live addresses at once throws
- sceKernelDirectMemoryQuery answers from tracked allocations
- SCE protections read back as set, GPU and AMPR bits included
- APR prefix path resolve, file size and stat by id, positional reads,
fsync/pread/pwrite; directories open as descriptors on Windows
- sceKernelCheckReachability, getpeername, shutdown
- Dinkumware C11 threads (_Mtx_*, _Cnd_*, _Thrd_*) in the title libc
layout; any pthread stack size, rounded at thread creation
libc:
- unaddressed guest mappings go to the system-managed area from
0x2_0000_0000, leaving the application area to fixed mappings
- the process starts in /app0
- guest sscanf on Windows; a null %s prints as (null) as on FreeBSD
- localeconv, _FNan, _FDtest, _FExp, __udivti3, wcsncpy_s, aligned
operator new, _Throw_Cpp_error
Tests: direct memory following physical pages, guest formatting.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
LeandroLP23
Chad
Bloxive
Merijn
Tomás Ortellado
STL1te
boykopovar