diff options
Diffstat (limited to 'cpukit/score/cpu/sparc/setjmp.S')
| -rw-r--r-- | cpukit/score/cpu/sparc/setjmp.S | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/cpukit/score/cpu/sparc/setjmp.S b/cpukit/score/cpu/sparc/setjmp.S new file mode 100644 index 0000000000..613df2ba20 --- /dev/null +++ b/cpukit/score/cpu/sparc/setjmp.S @@ -0,0 +1,144 @@ +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Modified for incorporation into newlib by Joel Sherrill + * (joel@OARcorp.com), On-Line Applications Research, 1995. + * Did the following: + * + merged in DEFS.h + * + removed error check since it prevented using this setjmp + * to "context switch" + * + added the support for the "user label" and "register" prefix + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: $Header$ + */ + +#if defined(LIBC_SCCS) && !defined(lint) + .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" +#endif /* LIBC_SCCS and not lint */ + +/* + * Recent versions of GNU cpp define variables which indicate the + * need for underscores and percents. If not using GNU cpp or + * the version does not support this, then you will obviously + * have to define these as appropriate. + */ + +#ifndef __USER_LABEL_PREFIX__ +#define __USER_LABEL_PREFIX__ _ +#endif + +#ifndef __REGISTER_PREFIX__ +#define __REGISTER_PREFIX__ +#endif + +/* ANSI concatenation macros. */ + +#define CONCAT1(a, b) CONCAT2(a, b) +#define CONCAT2(a, b) a ## b + +/* Use the right prefix for global labels. */ + +#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) + +/********************************************************************* + ********************************************************************* + * Contents of DEFS.h * + ********************************************************************* + *********************************************************************/ + +#ifdef PROF +#define ENTRY(x) \ + .align 4; .globl SYM(x); .proc 1; SYM(x):; .data; .align 4; 1: .long 0; \ + .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \ + or %lo(1b),%o0,%o0; restore +#else +#define ENTRY(x) \ + .align 4; .globl SYM(x); .proc 1; SYM(x): +#endif + + + +/********************************************************************* + ********************************************************************* + * END of DEFS.h * + ********************************************************************* + *********************************************************************/ + + +/* + * C library -- _setjmp, _longjmp + * + * _longjmp(a,v) + * will generate a "return(v?v:1)" from + * the last call to + * _setjmp(a) + * by unwinding the call stack. + * The previous signal state is NOT restored. + */ + + +/* #include "DEFS.h" */ + +ENTRY(setjmp) +ENTRY(_setjmp) + st %sp, [%o0] /* caller's stack pointer */ + st %i7, [%o0+4] /* caller's return pc */ + st %fp, [%o0+8] /* store caller's frame pointer */ + st %o7, [%o0+12] + retl + clr %o0 ! return 0 + +ENTRY(longjmp) +ENTRY(_longjmp) + ta 0x03 /* flush registers */ + addcc %o1, %g0, %g1 ! compute v ? v : 1 in a global register + be,a 0f + mov 1, %g1 +0: + ld [%o0], %sp /* caller's stack pointer */ + + ldd [%sp], %l0 + ldd [%sp+8], %l2 + ldd [%sp+16], %l4 + ldd [%sp+24], %l6 + + ldd [%sp+32], %i0 + ldd [%sp+40], %i2 + ldd [%sp+48], %i4 + + ld [%o0+4], %i7 /* caller's return pc */ + ld [%o0+8], %fp /* caller's frame pointer */ + ld [%o0+12], %o7 + + jmp %o7 + 8 ! success, return %g1 + mov %g1, %o0 + |