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/*-------------------------------------------------------------------------
setjmp.c - source file for ANSI routines setjmp & longjmp
Copyright (C) 2016, Maarten Brock. sourceforge.brock AT dse.nl
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.
-------------------------------------------------------------------------*/
#include <sdcc-lib.h>
#define __SDCC_HIDE_LONGJMP
#include <setjmp.h>
static void dummy (void) __naked
{
__asm
;--------------------------------------------------------
; overlayable items in ram
;--------------------------------------------------------
.area OSEG (PAG, OVR)
___setjmp_buf:
.ds 2
.area OSEG (PAG, OVR)
_longjmp_buf:
.ds 2
;--------------------------------------------------------
; extended address mode data
;--------------------------------------------------------
.area XSEG
_longjmp_PARM_2:
.ds 2
;--------------------------------------------------------
; code
;--------------------------------------------------------
.area CSEG (CODE)
;------------------------------------------------------------
;Allocation info for local variables in function '__setjmp'
;------------------------------------------------------------
;buf Allocated with name '___setjmp_buf'
;------------------------------------------------------------
;_setjmp.c:205: int __setjmp (jmp_buf buf)
; -----------------------------------------
; function __setjmp
; -----------------------------------------
; Stack space usage: 1 bytes.
.globl ___setjmp
___setjmp:
stx (___setjmp_buf + 0) ; msb(buf)
sta (___setjmp_buf + 1) ; lsb(buf)
; save stack pointer
tsx
pshh
txa
ldhx (___setjmp_buf)
sta 1,x
pula
sta 0,x
; save return address
lda 1,s
sta 2,x
lda 2,s
sta 3,x
; return 0
clra
tax
rts
;------------------------------------------------------------
;Allocation info for local variables in function 'longjmp'
;------------------------------------------------------------
;rv Allocated with name '_longjmp_PARM_2'
;buf Allocated with name '_longjmp_buf'
;------------------------------------------------------------
;_setjmp.c:216: int longjmp (jmp_buf buf, int rv)
; -----------------------------------------
; function longjmp
; -----------------------------------------
; Stack space usage: 1 bytes.
.globl _longjmp
.globl _longjmp_PARM_2
_longjmp:
stx (_longjmp_buf + 0) ; msb(buf)
sta (_longjmp_buf + 1) ; lsb(buf)
; Since rv is on the current stack, we need to move it to
; where we can still access it after switching stack pointer.
lda 3,s
sta (_longjmp_PARM_2 + 0)
lda 4,s
sta (_longjmp_PARM_2 + 1)
; restore stack pointer
ldhx (_longjmp_buf)
lda 0,x
psha
ldx 1,x
pulh
txs
; set return address
ldhx (_longjmp_buf)
lda 2,x
sta 1,s
lda 3,x
sta 2,s
;_setjmp.c:224: return rv ? rv : 1;
ldx (_longjmp_PARM_2 + 0)
txa
ora (_longjmp_PARM_2 + 1)
beq 0001$
lda (_longjmp_PARM_2 + 1)
rts
0001$:
lda #0x01
rts
__endasm;
}
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