| 1 | ############################################################################## |
|---|
| 2 | # setjmp.S -- CRX setjmp routine # |
|---|
| 3 | # # |
|---|
| 4 | # Copyright (c) 2004 National Semiconductor Corporation # |
|---|
| 5 | # # |
|---|
| 6 | # The authors hereby grant permission to use, copy, modify, distribute, # |
|---|
| 7 | # and license this software and its documentation for any purpose, provided # |
|---|
| 8 | # that existing copyright notices are retained in all copies and that this # |
|---|
| 9 | # notice is included verbatim in any distributions. No written agreement, # |
|---|
| 10 | # license, or royalty fee is required for any of the authorized uses. # |
|---|
| 11 | # Modifications to this software may be copyrighted by their authors # |
|---|
| 12 | # and need not follow the licensing terms described here, provided that # |
|---|
| 13 | # the new terms are clearly indicated on the first page of each file where # |
|---|
| 14 | # they apply. # |
|---|
| 15 | # # |
|---|
| 16 | # C library -- setjmp, longjmp # |
|---|
| 17 | # longjmp(a,v) # |
|---|
| 18 | # will generate a "return(v)" # |
|---|
| 19 | # from the last call to # |
|---|
| 20 | # setjmp(a) # |
|---|
| 21 | # by restoring r7-ra, sp, # |
|---|
| 22 | # and pc from 'a' # |
|---|
| 23 | # and doing a return. (Makes sure that longjmp never returns 0). # |
|---|
| 24 | ############################################################################## |
|---|
| 25 | |
|---|
| 26 | .text |
|---|
| 27 | .file "setjmp.s" |
|---|
| 28 | .align 4 |
|---|
| 29 | |
|---|
| 30 | .globl _setjmp |
|---|
| 31 | .align 4 |
|---|
| 32 | _setjmp: |
|---|
| 33 | #r2: .blkw |
|---|
| 34 | storm r2,{r7,r8,r9,r10,r11,r12,r13,r14} |
|---|
| 35 | stord sp,0(r2) |
|---|
| 36 | movd $0,r0 |
|---|
| 37 | jump ra |
|---|
| 38 | |
|---|
| 39 | .globl _longjmp |
|---|
| 40 | _longjmp: |
|---|
| 41 | #r2: .blkw # pointer save area |
|---|
| 42 | #r3: .blkw # ret vlaue |
|---|
| 43 | loadm r2, {r7,r8,r9,r10,r11,r12,r13,ra} |
|---|
| 44 | loadd 0(r2), sp |
|---|
| 45 | movd r3, r0 |
|---|
| 46 | cmpd $0, r3 |
|---|
| 47 | bne end1 |
|---|
| 48 | movd $1, r0 |
|---|
| 49 | end1: |
|---|
| 50 | jump ra |
|---|
| 51 | .align 4 |
|---|
