147 lines
2.3 KiB
Plaintext
147 lines
2.3 KiB
Plaintext
#
|
|
;
|
|
; (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
; See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
;
|
|
|
|
;
|
|
; Module: coroutine primitives
|
|
; Author: Kees Bot, Edwin Scheffer, Ceriel Jacobs
|
|
; Version: $Id$
|
|
;
|
|
; This has been taken from the ACK Modula-2 runtime system and adapted.
|
|
;
|
|
|
|
mes 2,EM_WSIZE,EM_PSIZE
|
|
|
|
;
|
|
; ___topsave: save the stack by sending it to the debugger
|
|
;
|
|
exp $___topsave
|
|
|
|
pro $___topsave, 0
|
|
#ifdef __sparc
|
|
inp $___topsave1
|
|
inp $___topsave2
|
|
cal $___topsave1
|
|
lfr EM_WSIZE
|
|
ret EM_WSIZE
|
|
end 0
|
|
|
|
pro $___topsave1,0
|
|
cal $___topsave2
|
|
lfr EM_WSIZE
|
|
ret EM_WSIZE
|
|
end 0
|
|
|
|
pro $___topsave2,0
|
|
#endif
|
|
mes 11
|
|
loe 0
|
|
lae 4 ; load line number and file name
|
|
loi EM_PSIZE
|
|
lim ; load ignore mask
|
|
lor 0 ; load LB
|
|
|
|
; now find the last argument base: first find the local base that has
|
|
; dynamic link 0.
|
|
|
|
lor 0
|
|
1
|
|
dup EM_PSIZE
|
|
dch
|
|
zer EM_PSIZE
|
|
cmp
|
|
zeq *2
|
|
dch
|
|
bra *1
|
|
2
|
|
lpb ; last argument base
|
|
|
|
; Now the stuff between the current stack pointer and this argument base
|
|
; is saved by sending it to the debugger.
|
|
|
|
lor 1
|
|
sbs EM_WSIZE
|
|
loc EM_WSIZE
|
|
adu EM_WSIZE ; gives size
|
|
lor 1 ; SP (the SP BEFORE pushing)
|
|
lor 1 ; SP (address of stack top to save)
|
|
cal $___sendtop ; ___sendtop(char *address, char *SP, unsigned size)
|
|
asp 4*EM_PSIZE+3*EM_WSIZE ; remove the lot from the stack
|
|
loc 1
|
|
ret EM_WSIZE ; return 1
|
|
end 0
|
|
|
|
exp $___topload
|
|
pro $___topload, 0
|
|
#ifdef __sparc
|
|
inp $___topload1
|
|
inp $___topload2
|
|
cal $___topload1
|
|
lfr EM_WSIZE
|
|
ret EM_WSIZE
|
|
end 0
|
|
|
|
pro $___topload1,0
|
|
lxl 0
|
|
dch
|
|
lpb
|
|
loi EM_PSIZE
|
|
cal $___topload2
|
|
asp EM_PSIZE
|
|
lfr EM_WSIZE
|
|
ret EM_WSIZE
|
|
end 0
|
|
|
|
pro $___topload2,0
|
|
#endif
|
|
mes 11
|
|
|
|
lal 0
|
|
loi EM_PSIZE
|
|
|
|
lxl 0
|
|
2
|
|
dup EM_PSIZE
|
|
adp -3*EM_PSIZE
|
|
lal 0
|
|
loi EM_PSIZE ; compare target SP with current LB to see if we must
|
|
cmp ; find another LB first
|
|
zgt *1
|
|
dch ; just follow dynamic chain to make sure we find
|
|
; a legal one
|
|
bra *2
|
|
1
|
|
str 0
|
|
|
|
str 1 ; restore SP
|
|
lor 1
|
|
adp -EM_PSIZE
|
|
#ifdef __sparc
|
|
inp $restore
|
|
cal $restore
|
|
#else
|
|
cal $___restoretop ; ___restoretop(char *SP)
|
|
#endif
|
|
asp EM_PSIZE+EM_WSIZE
|
|
str 0 ; restore local base
|
|
sim ; ignore mask
|
|
lae 4
|
|
sti EM_PSIZE
|
|
ste 0 ; line and file
|
|
loc 0
|
|
ret EM_WSIZE ; return 0
|
|
end 0
|
|
|
|
#ifdef __sparc
|
|
pro $restore
|
|
mes 11
|
|
lal 0
|
|
loi EM_PSIZE
|
|
cal $___restoretop
|
|
asp EM_PSIZE
|
|
ret 0
|
|
end 0
|
|
#endif
|