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Error Applet

Revision as of 15:17, 26 March 2019 by Yellows8 (talk | contribs)

This is the applet presented when a title displays an error message. See AM_services#Library_Applets.

All errors displayed by this applet get logged and can be viewed under 'Settings' > 'Support' > 'Error History'.

On pre-5.0.0 the specified LanguageCode has to be valid, otherwise a fatal-error is thrown. With [5.0.0+] it will use en-US when the LanguageCode is invalid.

Contents

ErrorContext

Offset Size Description
0x0 0x200 ?

ErrorCommonHeader

Offset Size Description
0x0 0x1 u8 type
0x1 0x1 u8 unk_x1
0x2 0x3 ?
0x5 0x1 [4.0.0+] u8 contextFlag. When set indicates that an additional storage is pushed for #ErrorContext.
0x6 0x1 u8 resultFlag. ErrorCommonArg: When clear, ErrorCode is used, otherwise the applet generates the error-code from res.
0x7 0x1 ?

ErrorCommonArg

Offset Size Description
0x0 0x8 ErrorCommonHeader
0x8 0x8 #ErrorCode
0x10 0x4 Result res

SystemErrorArg

Offset Size Description
0x0 0x8 ErrorCommonHeader. type=1.
0x8 0x8 #ErrorCode
0x10 0x8 LanguageCode
0x18 0x800 UTF-8 string dialogMessage
0x818 0x800 UTF-8 string fullscreenMessage, displayed when the user clicks on "Details". When not set this disables displaying Details.

This struct is 0x1018-bytes.

ApplicationErrorArg

Offset Size Description
0x0 0x8 ErrorCommonHeader. type=2 and unk_x1=1.
0x8 0x4 u32 errorNumber. Raw decimal error number which is displayed in the dialog.
0xC 0x8 LanguageCode
0x14 0x800 UTF-8 string dialogMessage
0x814 0x800 UTF-8 string fullscreenMessage, displayed when the user clicks on "Details". When not set this disables displaying Details.

This struct is 0x1014-bytes.

ErrorCode

This is an u64 containing the error-code: the low u32 is the module portion which is normally set to module + 2000, and the high u32 is the error description.

ResultBacktrace

Offset Size Description
0x0 0x4 s32 total entries
0x4 0x4*total_entries Array of Result

Usage

User-processes should push a common arguments struct (version=0) as well as the Arg struct. Once the applet finishes running successfully, it may return an output storage in some cases. An u8 status value is located at +1, where non-zero indicates error.