 RealView Compiler User's Guide | |
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RealView Compiler User's Guide
Preface Introduction Getting started with the ARM Compiler Compiler Features Coding Practices Diagnostic Messages Using the Inline and Embedded Assemblers Semihosting About semihosting
What is semihosting? The semihosting interface Semihosting implementation RealView ARMulator ISS RealView ICE Instruction Set System Model RealMonitor Semihosting operations angel_SWIreason_EnterSVC (0x17) angel_SWIreason_ReportException (0x18) SYS_CLOSE (0x02) SYS_CLOCK (0x10) SYS_ELAPSED (0x30) SYS_ERRNO (0x13) SYS_FLEN (0x0C) SYS_GET_CMDLINE (0x15) SYS_HEAPINFO (0x16) SYS_ISERROR (0x08) SYS_ISTTY (0x09) SYS_OPEN (0x01) SYS_READ (0x06) SYS_READC (0x07) SYS_REMOVE (0x0E) SYS_RENAME (0x0F) SYS_SEEK (0x0A) SYS_SYSTEM (0x12) SYS_TICKFREQ (0x31) SYS_TIME (0x11) SYS_TMPNAM (0x0D) SYS_WRITE (0x05) SYS_WRITEC (0x03) SYS_WRITE0 (0x04) Debug agent interaction SVCsSYS_ERRNO (0x13)
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Home > Semihosting > Semihosting operations > SYS_ERRNO (0x13) | |||
Returns the value of the C library errno variable associated with the host implementation of the semihosting SVCs. The errno variable can be set by a number of C library semihosted functions, including:
SYS_REMOVESYS_OPENSYS_CLOSESYS_READSYS_WRITESYS_SEEK.
Whether errno is set or not, and to what value, is entirely host‑specific, except where the ISO C standard defines the behavior.
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