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Do not attempt to register stdio stub in sysclib if not loaded in boot #883

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Merged
uyjulian merged 1 commit into from
Jul 6, 2026
+4 −4
Merged

Do not attempt to register stdio stub in sysclib if not loaded in boot #883

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4 changes: 2 additions & 2 deletions iop/system/sysclib/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -30,5 +30,5 @@ balancing between size, speed, and features.

In order to use this module in your program, you must integrate the module into
an IOPRP image, then load the image with `UDNL`.\
Using `LoadModule` or `LoadModuleBuffer` directly will not work, because the
module is already loaded at IOP boot.
Using `LoadModule` or `LoadModuleBuffer` directly will work, but is not
recommended because the old version of the module will remain in memory.
4 changes: 2 additions & 2 deletions iop/system/sysclib/src/_start.c
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Expand Up @@ -17,12 +17,12 @@ extern struct irx_export_table _exp_sysclib;
extern struct irx_export_table _exp_stdio;

int _start(int argc, char *argv[]) {
(void)argc;
(void)argv;

if (RegisterLibraryEntries(&_exp_sysclib) != 0)
return MODULE_NO_RESIDENT_END;
if (RegisterLibraryEntries(&_exp_stdio) != 0)
// Unofficial: only attempt to register stdio stub if in boot stage
if (!argc && RegisterLibraryEntries(&_exp_stdio) != 0)
return MODULE_NO_RESIDENT_END;

return MODULE_RESIDENT_END;
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