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Diffstat (limited to 'newlib/libc/machine/m32c/setjmp.S')
| -rw-r--r-- | newlib/libc/machine/m32c/setjmp.S | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/newlib/libc/machine/m32c/setjmp.S b/newlib/libc/machine/m32c/setjmp.S deleted file mode 100644 index 96cd0f20d..000000000 --- a/newlib/libc/machine/m32c/setjmp.S +++ /dev/null @@ -1,133 +0,0 @@ -/* - -Copyright (c) 2005 Red Hat Incorporated. -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - - Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - 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. - - The name of Red Hat Incorporated may not be used to endorse - or promote products derived from this software without specific - prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 RED HAT INCORPORATED 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. - -*/ - -#if defined(__r8c_cpu__) || defined(__m16c_cpu__) -#define A16 1 -#endif - -/* We implement setjmp/longjmp much like the way gcc implements - exceptions - we create new stack frames, then switch to them and - return. Thus, the two setjmp's below each push all the relevent - registers, then copy the whole frame into the buffer (first $sp is - moved, then smovf copies the frame itself), and the two longjmps - restore $sp, copy the frame back into place, and issue the same - return as the setjmp would have used. - - Since the sizes of registers differs between the 16 and 24 bit - models, we provide separate implementations for each rather than - trying to parameterize them. - - Jump buffer sizes: 21 bytes for 16 bit, 34 bytes for 24 bit. -*/ - - .text - -#ifdef A16 /* 16 bit versions */ - - .global _setjmp -_setjmp: - enter #0 - pushm r1,r2,r3,a0,a1,sb,fb - -; At this point, the stack looks like this: -; ... [pc:3] [oldfb:2] <fb> [r1:2] [r2:2] [r3:2] [a0:2] [a1:2] [sb:2] [fb:2] <sp> */ - - mov.w r1,a1 ; a1 is the destination of smovf - mov.b #0,r1h - stc sp,a0 ; r1h:a0 is the source of smovf - mov.w a0,[a1] - add.w #2,a1 - mov.w #19,r3 ; plus two for sp later - smovf.b - - ; Return 0 to caller. - mov.w #0,r0 - popm r1,r2,r3,a0,a1,sb,fb - exitd - - .global _longjmp -_longjmp: - enter #0 - mov.w r1,a0 ; pointer to jump buf - mov.w r2,r0 ; setjmp's "new" return value - - mov.b #0,r1h ; r1h: a0 is the source, now jmpbuf - mov.w [a0],a1 ; dest is new stack - ldc a1,sp - add.w #2,a0 - mov.w #19,r3 - smovf.b - - ;; now return to our caller with this newly restored frame - popm r1,r2,r3,a0,a1,sb,fb - exitd - -#else /* 24 bit versions */ - - .global _setjmp -_setjmp: - enter #0 - pushm r1,r2,r3,a0,a1,sb,fb - -; At this point, the stack looks like this: -; ... [jbuf:4] [pc:4] [oldfb:4] <fb> [r1:2] [r2:2] [r3:2] [a0:4] [a1:4] [sb:4] [fb:4] <sp> */ - - mov.l 8[fb],a1 ; a1 is the destination of smovf - stc sp,a0 ; r1h:a0 is the source of smovf - mov.l a0,[a1] - add.l #4,a1 - mov.w #30,r3 ; plus two for sp later - smovf.b - - ; Return 0 to caller. - mov.w #0,r0 - popm r1,r2,r3,a0,a1,sb,fb - exitd - - .global _longjmp -_longjmp: - enter #0 -; ... [rv:2] [jbuf:4] [pc:4] [oldfb:4] <fb> - mov.l 8[fb],a0 ; pointer to jump buf - mov.w 12[fb],r0 ; setjmp's "new" return value - - mov.l [a0],a1 ; dest is new stack - ldc a1,sp - add.l #4,a0 - mov.w #30,r3 - smovf.b - - ;; now return to our caller with this newly restored frame - popm r1,r2,r3,a0,a1,sb,fb - exitd -#endif - |