TRAP instructions

[snim2]

Appendix A of the Epiphany Architecture Reference Manual says that trap takes a 5-bit unsigned immediate, but the decode table shows a 6-bit immediate. Does anyone know which of these is correct? Also, where do the return values and error numbers from system calls get stored?

Thanks,

Sarah

[sebraa]

I don't know the syscall interface.
The TRAP instruction uses 6 bits (immediates between 0 and 63; the assembler rejects a TRAP 64 instruction).

[snim2]

OK, many thanks.

Sarah