1 /*-------------------------------------------------------------------------
2 setjmp.c - source file for ANSI routines setjmp & longjmp
4 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
6 This library is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Library General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
27 #if defined(SDCC_USE_XSTACK)
29 static void dummy (void) __naked
33 ;------------------------------------------------------------
34 ;Allocation info for local variables in function 'setjmp'
35 ;------------------------------------------------------------
36 ;buf Allocated to registers dptr b
37 ;------------------------------------------------------------
38 ;../../device/lib/_setjmp.c:180:int setjmp (jmp_buf buf)
39 ; -----------------------------------------
41 ; -----------------------------------------
52 ;../../device/lib/_setjmp.c:183:*buf++ = bpx;
58 ;../../device/lib/_setjmp.c:184:*buf++ = spx;
64 ;../../device/lib/_setjmp.c:185:*buf++ = bp;
70 ;../../device/lib/_setjmp.c:186:*buf++ = SP;
76 ;../../device/lib/_setjmp.c:187:*buf++ = *((unsigned char __data *) SP );
86 ;../../device/lib/_setjmp.c:188:*buf = *((unsigned char __data *)SP - 1);
90 ; peephole 177.g optimized mov sequence
98 ;../../device/lib/_setjmp.c:189:return 0;
103 ;------------------------------------------------------------
104 ;Allocation info for local variables in function 'longjmp'
105 ;------------------------------------------------------------
106 ;rv Allocated to stack - offset -2
107 ;buf Allocated to registers dptr b
108 ;lsp Allocated to registers r5
109 ;------------------------------------------------------------
110 ;../../device/lib/_setjmp.c:192:int longjmp (jmp_buf buf, int rv)
111 ; -----------------------------------------
113 ; -----------------------------------------
124 ;../../device/lib/_setjmp.c:193:bpx = *buf++;
130 ;../../device/lib/_setjmp.c:194:spx = *buf++;
136 ;../../device/lib/_setjmp.c:195:bp = *buf++;
142 ;../../device/lib/_setjmp.c:196:lsp = *buf++;
149 ;../../device/lib/_setjmp.c:197:*((unsigned char __data *) lsp) = *buf++;
159 ;../../device/lib/_setjmp.c:198:*((unsigned char __data *) lsp - 1) = *buf;
169 ;../../device/lib/_setjmp.c:199:SP = lsp;
172 ;../../device/lib/_setjmp.c:200:return rv;
182 #elif defined(SDCC_STACK_AUTO)
184 static void dummy (void) __naked
188 ;------------------------------------------------------------
189 ;Allocation info for local variables in function 'setjmp'
190 ;------------------------------------------------------------
191 ;buf Allocated to registers dptr b
192 ;------------------------------------------------------------
193 ;../../device/lib/_setjmp.c:122:int setjmp (unsigned char *buf)
194 ; -----------------------------------------
196 ; -----------------------------------------
208 ;../../device/lib/_setjmp.c:125:*buf = BP;
214 ;../../device/lib/_setjmp.c:126:*buf = SP;
220 ;../../device/lib/_setjmp.c:127:*buf++ = *((unsigned char __data *) SP );
230 ;../../device/lib/_setjmp.c:128:*buf++ = *((unsigned char __data *)SP - 1);
241 ;../../device/lib/_setjmp.c:129:return 0;
246 ;------------------------------------------------------------
247 ;Allocation info for local variables in function 'longjmp'
248 ;------------------------------------------------------------
249 ;rv Allocated to stack - offset -3
250 ;buf Allocated to registers dptr b
251 ;lsp Allocated to registers r5
252 ;------------------------------------------------------------
253 ;../../device/lib/_setjmp.c:28:int longjmp (jmp_buf buf, int rv)
254 ; -----------------------------------------
256 ; -----------------------------------------
274 ;../../device/lib/_setjmp.c:30:bp = *buf++;
281 ;../../device/lib/_setjmp.c:31:lsp = *buf++;
288 ;../../device/lib/_setjmp.c:32:*((unsigned char __data *) lsp) = *buf++;
298 ;../../device/lib/_setjmp.c:33:*((unsigned char __data *) lsp - 1) = *buf;
309 ;../../device/lib/_setjmp.c:34:SP = lsp;
312 ;../../device/lib/_setjmp.c:35:return rv;
323 //extern unsigned char __data bp;
325 int setjmp (jmp_buf buf)
327 /* registers would have been saved on the
328 stack anyway so we need to save SP
329 and the return address */
332 *buf++ = *((unsigned char __data *) SP );
333 *buf = *((unsigned char __data *)SP - 1);
337 int longjmp (jmp_buf buf, int rv)
342 *((unsigned char __data *) lsp) = *buf++;
343 *((unsigned char __data *) lsp - 1) = *buf;