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;--------------------------------------------------------------------------
; setjmp.s
;
; Copyright (C) 2014, Philipp Klaus Krause
;
; This library is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by the
; Free Software Foundation; either version 2, or (at your option) any
; later version.
;
; This library is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this library; see the file COPYING. If not, write to the
; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
; MA 02110-1301, USA.
;
; As a special exception, if you link this library with other files,
; some of which are compiled with SDCC, to produce an executable,
; this library does not by itself cause the resulting executable to
; be covered by the GNU General Public License. This exception does
; not however invalidate any other reasons why the executable file
; might be covered by the GNU General Public License.
;--------------------------------------------------------------------------
.area CODE
.globl ___setjmp
___setjmp:
ldw y, (4, sp)
; store return address
ldw x, (1, sp)
ldw (y), x
ld a, (3, sp)
ld (2, y), a
; store stack pointer
ldw x, sp
ldw (3, y), x
; return 0
clrw x
retf
.globl _longjmp
_longjmp:
ldw x, (4, sp)
ldw y, (6, sp)
; Restore stack pointer
pushw x
ldw x, (3, x)
ldw (1, x), y
popw y
ldw sp, x
; Calculate return value
popw x
pop a
tnzw x
jrne jump
incw x
jump:
; return
ld a, (y)
ldw y, (1, y)
pushw y
push a
retf
|
