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assemblyopenvmsitanium

"Hello World" in Openvms/Itanium assembly example?

I've been searching the web for an example "Hello World" program written for the intel ia64 assembler on OpenVMS/Itanium. Has anybody done this?

Thanks

Solution

  • For a start, using printf from the crtl, leaving out unwind information directives:

    .vms_module_name "HELLO"
.vms_module_version "V1.0"

.section .rdata, "a", "progbits"
.align 8
.STRING:
stringz "Hello World!\n"

.global DECC$TXPRINTF
.type DECC$TXPRINTF, @function

.text
.global HELLO
.proc HELLO

HELLO:

PROLOGUE:
alloc loc2 = ar.pfs, 0, 4, 1, 0
mov loc3 = sp
mov loc1 = b0

CODE:
addl out0 = @ltoff(.STRING), gp
;;
ld8 out0 = [out0]
mov loc0 = gp
br.call.sptk.many b0 = DECC$TXPRINTF
;;

EPILOGUE:
mov gp = loc0
mov ar.pfs = loc2
mov b0 = loc1
mov sp = loc3
br.ret.sptk.many b0
.endp HELLO