📄 excalib.s
字号:
/* excALib.s - exception handling 68K assembly language routines *//* Copyright 1984-1994 Wind River Systems, Inc. */ .data .globl _copyright_wind_river .long _copyright_wind_river/*modification history--------------------02f,21jun96,ms merged kdl's patch for SPR 2245 (68000 exception handling)02e,26oct94,tmk added MC68LC040 support02d,30may94,tpr added MC68060 cpu support.02c,01oct92,jcf fixed excIntStub to accomodate for handling errno.. sigh. fixed E29 for MC68040.02b,23aug92,jcf fixed excIntStub to handle errno on stack correctly.02a,02aug92,jcf overhauled. exception handling now avoids excJobAdd().01p,26may92,rrr the tree shuffle01o,04oct91,rrr passed through the ansification filter -fixed #else and #endif -changed ASMLANGUAGE to _ASMLANGUAGE -changed copyright notice01n,25sep91,yao added support for CPU32.01m,28aug91,shl added support for MC68040, cleaned up #if CPU, updated copyright.01l,24aug91,jcf fixed sp offset calculation to account for errno.01k,14mar90,jdi documentation cleanup; fixed jcf's last mod letter to j.01j,17jan89,jcf fixed bug in excIntStub; intExit no longer takes d0 on stack.01i,13feb88,dnw added .data before .asciz above, for Intermetrics assembler.01h,01nov87,jcf added code in excStub to retry an instruction01g,24mar87,dnw added .globl for excExcHandle. documentation.01f,26feb87,rdc modifications for VRTX 3.2.01e,21dec86,dnw changed to not get include files from default directories.01d,31oct86,dnw Eliminated magic f/b numeric labels which mitToMot can't handle. Changed "moveml" instructions to use Motorola style register lists, which are now handled by "aspp". Changed "mov[bwl]" to "move[bwl]" for compatiblity w/Sun as.01c,26jul86,dnw changed 68000 version to use BSR table w/ single handler rtn.01b,03jul86,dnw documentation.01a,03apr86,dnw extracted from dbgALib.s*//*DESCRIPTIONThis module contains the assembly language exception handling stub.It is connected directly to the 680x0 exception vectors.It sets up an appropriate environment and then calls a routinein excLib(1).SEE ALSO: excLib(1)*/#define _ASMLANGUAGE#include "vxWorks.h" /* globals */#if (CPU==MC68000) .globl _excBsrTbl /* BSR table */#endif /* (CPU==MC68000) */ .globl _excStub /* generic stub routine */ .globl _excIntStub /* uninitialized interrupt handler */#if (CPU==MC68040 || CPU==MC68LC040) .comm safearea,24 /* ERRATA: E29 */#endif /* (CPU==MC68040 || CPU==MC68LC040) */ .text .even#if (CPU==MC68000)/**************************************************************************** excBsrTbl - table of BSRs** NOMANUAL*/_excBsrTbl: bsr _excIntStub /* 0 */ /* reset sp */ bsr _excIntStub /* reset pc */ bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excIntStub /* uninitialized interrupt */ bsr _excIntStub /* 10 */ /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* unassigned reserved */ bsr _excIntStub /* spurious interrupt */ bsr _excIntStub /* level 1 Auto Vec */ bsr _excIntStub /* level 2 Auto Vec */ bsr _excIntStub /* level 3 Auto Vec */ bsr _excIntStub /* level 4 Auto Vec */ bsr _excIntStub /* level 5 Auto Vec */ bsr _excIntStub /* level 6 Auto Vec */ bsr _excIntStub /* level 7 Auto Vec */ bsr _excStub /* 20 */ bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub /* 30 */ bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excStub bsr _excIntStub /* 40 */ /* User Interrupts */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* 50 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* 60 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* 70 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* 80 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* 90 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* a0 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* b0 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* c0 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* d0 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* e0 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub /* f0 */ bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub bsr _excIntStub#endif /* (CPU==MC68000) *//*********************************************************************** excStub - exception handler** NOMANUAL*/_excStub:#if (CPU==MC68040 || CPU==MC68LC040) moveml d0-d2/a0-a2,safearea /* MC68040 ERRATA: E29 */#endif /* (CPU==MC68040 || CPU==MC68LC040) */#if (CPU==MC68000) subl #0x44,a7 /* save room for REG_SET - sizeof (PC)*/ moveml d0-d7/a0-a7,a7@ /* save registers */ addl #0x48,a7@(0x3c) /* point saved stack pointer at esf */ movel a7@(0x44),d0 /* get BSR return adrs */ subql #4,d0 /* adjust return adrs to be BSR adrs */ subl #_excBsrTbl,d0 /* get offset from start of BSR table */ lsrw #2,d0 /* turn vector offset into excep num */ clrw a7@(0x40) /* clear padding */ movew a7@(0x50),a7@(0x42) /* fill in status register */ movel a7@(0x52),a7@(0x44) /* fill in program counter */#else /* (CPU==MC680[12346]0 || CPU==CPU32) */ subl #0x48,a7 /* save room for REG_SET */ moveml d0-d7/a0-a7,a7@ /* save registers */ addl #0x48,a7@(0x3c) /* point saved stack pointer at esf */ clrl d0 /* clear d0 */ movew a7@(0x4e),d0 /* get the vector offset from the esf */ andw #0x0fff,d0 /* clear the format */ lsrw #2,d0 /* turn vector offset into excep num */ clrw a7@(0x40) /* clear padding */ movew a7@(0x48),a7@(0x42) /* fill in status register */ movel a7@(0x4a),a7@(0x44) /* fill in program counter */#endif /* (CPU==MC680[12346]0 || CPU==CPU32) */ movel a7,a7@- /* push pointer to REG_SET */ pea a7@(0x4c) /* push pointer to exception frame */ movel d0,a7@- /* push exception number */ jsr _excExcHandle /* do exception processing */ addl #0xc,a7 /* clean up pushed arguments */ moveml a7@,d0-d7/a0-a6 /* restore registers except adj. a7 */ addl #0x48,a7 /* pop REG_SET off stack */ rte /* return to task that got exception *//*********************************************************************** excIntStub - uninitialized interrupt handler** NOMANUAL*/_excIntStub: addql #1,_intCnt /* from intEnt(); errno saved below */#if (CPU==MC68000) subl #0x44,a7 /* save room for REG_SET - sizeof (PC)*/ moveml d0-d7/a0-a7,a7@ /* save registers */ addl #0x48,a7@(0x3c) /* point saved stack pointer at esf */ movel a7@(0x44),d0 /* get BSR return adrs */ subql #4,d0 /* adjust return adrs to be BSR adrs */ subl #_excBsrTbl,d0 /* get offset from start of BSR table */ lsrw #2,d0 /* turn vector offset into excep num */ clrw a7@(0x40) /* clear padding */ movew a7@(0x50),a7@(0x42) /* fill in status register */ movel a7@(0x52),a7@(0x44) /* fill in program counter */#else /* (CPU==MC680[12346]0 || CPU==CPU32) */ subl #0x48,a7 /* save room for REG_SET */ moveml d0-d7/a0-a7,a7@ /* save registers */ addl #0x48,a7@(0x3c) /* point saved stack pointer at esf */ clrl d0 /* clear d0 */ movew a7@(0x4e),d0 /* get the vector offset from the esf */ andw #0x0fff,d0 /* clear the format */ lsrw #2,d0 /* turn vector offset into excep num */ clrw a7@(0x40) /* clear padding */ movew a7@(0x48),a7@(0x42) /* fill in status register */ movel a7@(0x4a),a7@(0x44) /* fill in program counter */#endif /* (CPU==MC680[12346]0 || CPU==CPU32) */ movel _errno,a7@- /* save errno on the stack (intEnt()) */ pea a7@(0x4) /* push pointer to REG_SET */ pea a7@(0x50) /* push pointer to exception frame */ movel d0,a7@- /* push exception number */ jsr _excIntHandle /* do exception processing */ addl #0xc,a7 /* clean up pushed arguments */ movel a7@+,_errno /* restore errno */ moveml a7@,d0-d7/a0-a6 /* restore registers from REG_SET */ addl #0x48,a7 /* point stack pointer at esf */ movel _errno,a7@- /* save errno on the stack (intEnt()) */ jmp _intExit /* exit the ISR thru the kernel */⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -