| 1 |
207 |
jeremybenn |
/* setjmp.S. Implementation of setjmp.
|
| 2 |
|
|
|
| 3 |
|
|
Copyright (C) 2010, Embecosm Limited
|
| 4 |
|
|
|
| 5 |
|
|
Contributor Jeremy Bennett
|
| 6 |
|
|
|
| 7 |
|
|
This file is part of Newlib.
|
| 8 |
|
|
|
| 9 |
|
|
This program is free software; you can redistribute it and/or modify it
|
| 10 |
|
|
under the terms of the GNU General Public License as published by the Free
|
| 11 |
|
|
Software Foundation; either version 3 of the License, or (at your option)
|
| 12 |
|
|
any later version.
|
| 13 |
|
|
|
| 14 |
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
| 15 |
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 16 |
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
| 17 |
|
|
more details.
|
| 18 |
|
|
|
| 19 |
|
|
You should have received a copy of the GNU General Public License along
|
| 20 |
|
|
with this program. If not, see . */
|
| 21 |
|
|
/* -------------------------------------------------------------------------- */
|
| 22 |
|
|
/* This program is commented throughout in a fashion suitable for processing
|
| 23 |
|
|
with Doxygen. */
|
| 24 |
|
|
/* -------------------------------------------------------------------------- */
|
| 25 |
|
|
|
| 26 |
|
|
|
| 27 |
|
|
/* -------------------------------------------------------------------------- */
|
| 28 |
399 |
jeremybenn |
/*!setjmp
|
| 29 |
207 |
jeremybenn |
|
| 30 |
|
|
All processor state is saved in the buffer provided. We need not save r0
|
| 31 |
|
|
(it will always be zero) and we need not save r11 (it will always be
|
| 32 |
399 |
jeremybenn |
overridden here, and in longjmp).
|
| 33 |
207 |
jeremybenn |
|
| 34 |
|
|
@todo We should prefer to save and restore the status register, but this is
|
| 35 |
|
|
not directly possible in user code. There is some merit in code to
|
| 36 |
|
|
set the flag, since in compiled C code, that might be expected to hold
|
| 37 |
|
|
a value. We leave a space for this information for future enhancement.
|
| 38 |
|
|
|
| 39 |
|
|
@param[out] env(r3) A buffer to save all the current processor state.
|
| 40 |
|
|
|
| 41 |
|
|
@return zero.
|
| 42 |
|
|
/* -------------------------------------------------------------------------- */
|
| 43 |
|
|
.align 4
|
| 44 |
399 |
jeremybenn |
.global setjmp
|
| 45 |
|
|
.type setjmp,@function
|
| 46 |
|
|
setjmp:
|
| 47 |
207 |
jeremybenn |
l.sw 4(r3),r1 /* Slot 0 saved for flag in future */
|
| 48 |
|
|
l.sw 8(r3),r2
|
| 49 |
|
|
l.sw 12(r3),r3
|
| 50 |
|
|
l.sw 16(r3),r4
|
| 51 |
|
|
l.sw 20(r3),r5
|
| 52 |
|
|
l.sw 24(r3),r6
|
| 53 |
|
|
l.sw 28(r3),r7
|
| 54 |
|
|
l.sw 32(r3),r8
|
| 55 |
|
|
l.sw 36(r3),r9
|
| 56 |
|
|
l.sw 40(r3),r10 /* Skip r11 */
|
| 57 |
|
|
l.sw 44(r3),r12
|
| 58 |
|
|
l.sw 48(r3),r13
|
| 59 |
|
|
l.sw 52(r3),r14
|
| 60 |
|
|
l.sw 56(r3),r15
|
| 61 |
|
|
l.sw 60(r3),r16
|
| 62 |
|
|
l.sw 64(r3),r17
|
| 63 |
|
|
l.sw 68(r3),r18
|
| 64 |
|
|
l.sw 72(r3),r19
|
| 65 |
|
|
l.sw 76(r3),r20
|
| 66 |
|
|
l.sw 80(r3),r21
|
| 67 |
|
|
l.sw 84(r3),r22
|
| 68 |
|
|
l.sw 88(r3),r23
|
| 69 |
|
|
l.sw 92(r3),r24
|
| 70 |
|
|
l.sw 96(r3),r25
|
| 71 |
|
|
l.sw 100(r3),r26
|
| 72 |
|
|
l.sw 104(r3),r27
|
| 73 |
|
|
l.sw 108(r3),r28
|
| 74 |
|
|
l.sw 112(r3),r29
|
| 75 |
|
|
l.sw 116(r3),r30
|
| 76 |
|
|
l.sw 120(r3),r31
|
| 77 |
|
|
|
| 78 |
|
|
l.jr r9
|
| 79 |
|
|
l.addi r11,r0,0 /* Zero result */
|
| 80 |
|
|
|
| 81 |
399 |
jeremybenn |
.size setjmp, .-setjmp
|
