Re: Help needed: small piece of assembler code for IRAF
On Sep 18 2024, Ole Streicher wrote:
> As IRAF is a 40-year old package, there was already some assembler that
> was used ~35 years ago [2]:
>
> .text
> .globl _zsvjmp_
>
> JMPBUF = 4
> STATUS = 8
>
> _zsvjmp_: |# CALL ZSVJMP (JMPBUF, STATUS)
> movl sp@(JMPBUF),a0 |# set A0 to point to jmp_buf
> movl sp@(STATUS),a1 |# A1 = status variable
> movl a1,a0@ |# JB[0] = addr of status variable
> clrl a1@ |# return zero status
> addql #4,sp@(JMPBUF) |# skip first cell of jmp_buf
> jmp _setjmp |# let setjmp do the rest.
>
> However, just including this does not work because assembler syntax
> changed [3].
Registers need to be prefixed with %, and assembler labels for C symbols
do not have a _ prefix.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
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