 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_GET_CMDLINE (0x15)
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Home > Semihosting > Semihosting operations > SYS_GET_CMDLINE (0x15) | |||
Returns the command line used to call the executable, that is, argc and argv.
On entry, r1 points to a two‑word data block to be used for returning the command string and its length:
- word 1
A pointer to a buffer of at least the size specified in word two.
- word 2
The length of the buffer in bytes.
On exit:
Register
r1points to a two‑word data block:- word 1
A pointer to null‑terminated string of the command line.
- word 2
The length of the string.
The debug agent might impose limits on the maximum length of the string that can be transferred. However, the agent must be able to transfer a command line of at least 80 bytes.
Register
r0contains an error code:0 if the call is successful
–1 if the call is not successful, for example, because of a communications error.
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