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phantomptrandClaude Opus 5.5
c14782944d
Upload, install, convert and manage PS5 game packages over the network. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
93 lines
3.8 KiB
C
93 lines
3.8 KiB
C
#ifndef PS5UPLOAD_APP_INFO_H
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#define PS5UPLOAD_APP_INFO_H
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/* sceKernelGetAppInfo(pid, &info) — app id and title id for a process.
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*
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* ── Why this header exists ──────────────────────────────────────────
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*
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* The struct was once copy-pasted into four files with two different
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* layouts; activity.c used `uint8_t unk[0x40]` and read title_id at
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* offset 64. This is now the single definition.
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*
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* ── title_id is at offset 16, measured on hardware. ─────────────────
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*
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* 5.4.5 moved title_id to offset 20, because etaHEN, one onionHEN copy and
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* the SDK's `ps` sample declare a `uint32_t app_type` before it. That change
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* was justified by "82 processes, zero title ids" — measured against
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* PROC_LIST (74), which returns only pid and name and never carried a title
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* id at all. Wrong endpoint, confident wrong conclusion.
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*
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* Measured properly against PROCESS_LIST (162) on FW 5.10 and FW 9.60,
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* offset 20 returned "40087" for "NPXS40087" and "19534" for "PPSA19534" —
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* the last five characters, exactly a four-byte overshoot. f1ffeb65 reverted
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* to 16 and the _Static_assert below pins it. onionHEN (four of its five
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* copies) and kstuff-lite also use offset 16.
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*
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* Whichever layout, the struct is 0x60 bytes — the same size every one of
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* those references passes to sceKernelGetAppInfo — so the kernel's write
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* cannot overflow it. It is not a stack-overflow risk.
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*
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* A returned value of non-zero means the pid is not a registered app
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* (a daemon or system process); the struct contents are meaningless in
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* that case and callers must not read them.
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include <sys/types.h>
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typedef struct app_info {
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uint32_t app_id;
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uint64_t unknown1;
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/* Offset 16. Measured, not assumed -- see the note above.
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* The field is wider than the value it holds, so do not
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* assume the kernel terminated it. */
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char title_id[14];
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char unknown2[0x3c];
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} app_info_t;
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/* The whole bug was a wrong offset, so pin it. If someone reorders or
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* drops a field again, this fails at compile time rather than silently
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* returning empty title ids on a console. */
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_Static_assert(offsetof(app_info_t, app_id) == 0,
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"app_id must be first");
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_Static_assert(offsetof(app_info_t, title_id) == 16,
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"title_id is at offset 16 on the firmwares this was "
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"measured on; offset 20 returns only the last five "
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"characters of the real value");
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extern int sceKernelGetAppInfo(pid_t pid, app_info_t *info);
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/* True when `s` looks like a real title id: four upper-case letters
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* then five digits (CUSA12345, PPSA01234, NPXS40000).
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*
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* Checked before any title id is used, so that if this struct is ever
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* wrong again the result is "no title" rather than garbage flowing into
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* cheat lookups and the UI. */
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static inline int app_info_title_id_valid(const char *s) {
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if (!s) return 0;
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for (int i = 0; i < 4; i++)
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if (s[i] < 'A' || s[i] > 'Z') return 0;
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for (int i = 4; i < 9; i++)
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if (s[i] < '0' || s[i] > '9') return 0;
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return s[9] == '\0';
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}
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/* Copy the title id out as a NUL-terminated string. Returns 1 and fills
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* `out` when the process is an app with a plausible title id, else 0
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* and leaves `out` an empty string. */
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static inline int app_info_title_id(const app_info_t *info,
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char *out, size_t out_sz) {
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if (!out || out_sz < 10) return 0;
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out[0] = '\0';
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if (!info) return 0;
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char tid[10];
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for (int i = 0; i < 9; i++) tid[i] = info->title_id[i];
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tid[9] = '\0';
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if (!app_info_title_id_valid(tid)) return 0;
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for (int i = 0; i < 10; i++) out[i] = tid[i];
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return 1;
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}
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#endif /* PS5UPLOAD_APP_INFO_H */
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