URL
https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk
Subversion Repositories openrisc_me
[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [machine/] [or32/] [setjmp.S] - Rev 301
Go to most recent revision | Compare with Previous | Blame | View Log
/* setjmp.S. Implementation of setjmp.
Copyright (C) 2010, Embecosm Limited <info@embecosm.com>
Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
This file is part of Newlib.
This program 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 3 of the License, or (at your option)
any later version.
This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
/* -------------------------------------------------------------------------- */
/* This program is commented throughout in a fashion suitable for processing
with Doxygen. */
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/*!_setjmp
All processor state is saved in the buffer provided. We need not save r0
(it will always be zero) and we need not save r11 (it will always be
overridden here, and in _longjmp).
@todo We should prefer to save and restore the status register, but this is
not directly possible in user code. There is some merit in code to
set the flag, since in compiled C code, that might be expected to hold
a value. We leave a space for this information for future enhancement.
@param[out] env(r3) A buffer to save all the current processor state.
@return zero.
/* -------------------------------------------------------------------------- */
.align 4
.global _setjmp
.type _setjmp,@function
_setjmp:
l.sw 4(r3),r1 /* Slot 0 saved for flag in future */
l.sw 8(r3),r2
l.sw 12(r3),r3
l.sw 16(r3),r4
l.sw 20(r3),r5
l.sw 24(r3),r6
l.sw 28(r3),r7
l.sw 32(r3),r8
l.sw 36(r3),r9
l.sw 40(r3),r10 /* Skip r11 */
l.sw 44(r3),r12
l.sw 48(r3),r13
l.sw 52(r3),r14
l.sw 56(r3),r15
l.sw 60(r3),r16
l.sw 64(r3),r17
l.sw 68(r3),r18
l.sw 72(r3),r19
l.sw 76(r3),r20
l.sw 80(r3),r21
l.sw 84(r3),r22
l.sw 88(r3),r23
l.sw 92(r3),r24
l.sw 96(r3),r25
l.sw 100(r3),r26
l.sw 104(r3),r27
l.sw 108(r3),r28
l.sw 112(r3),r29
l.sw 116(r3),r30
l.sw 120(r3),r31
l.jr r9
l.addi r11,r0,0 /* Zero result */
.size _setjmp, .-_setjmp
Go to most recent revision | Compare with Previous | Blame | View Log