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excALib.s
资源名称：vxwork_src.rar　[点击查看]
上传用户：nvosite88
上传日期：2007-01-17
资源大小：4983k
文件大小：13k
源码类别：

VxWorks

开发平台：

C/C++

excALib.s：源码内容
  1. /* excALib.s - exception handling I80x86 assembly routines */
  3. /* Copyright 1984-2001 Wind River Systems, Inc. */
  5. /*
  6. modification history
  7. --------------------
  8. 01f,25sep01,hdn  called intEnt() in excIntStub() to support the interrupt stack
  9. 01e,23aug01,hdn  added FUNC/FUNC_LABEL, replaced .align with .balign
  10.  added "error" parameter for exc{Exc,Int}Handle.
  11. 01d,26sep95,hdn  fixed a bug by incrementing _intCnt in excIntStub.
  12. 01c,04jun93,hdn  updated to 5.1
  13.   -overhauled
  14.   -fixed #else and #endif
  15.   -changed ASMLANGUAGE to _ASMLANGUAGE
  16.   -changed copyright notice
  17. 01b,13oct92,hdn  debugged.
  18. 01a,28feb92,hdn  written based on TRON, 68k version.
  19. */
  21. /*
  22. DESCRIPTION
  23. This module contains the assembly language exception handling stub.
  24. It is connected directly to the 80x86 exception vectors.
  25. It sets up an appropriate environment and then calls a routine
  26. in excLib(1).
  28. .ne 26
  29. EXCEPTION STACK FRAME GROWTH
  30. .CS
  31.    Exception/Trap               Interrupt
  32.                                      -----------------------
  33.                                       vector-number
  34.   sp_5 -----------------------       -----------------------
  35. vector-number                 sp_1(pointer to ESFn) 
  36.   sp_4 -----------------------       -----------------------
  37.         sp_1(pointer to ESFn)         sp_2(pointer to REGS)
  38.   sp_3 -----------------------       -----------------------
  39.         sp_2(pointer to REGS)         errno
  40.   sp_2 -----------------------       -----------------------
  41.         edi                           edi
  42.          |                             |
  43.         eax                           eax
  44. eflags                        eflags
  45. pc / return-address           pc / return-address
  46.   sp_1 -----------------------       -----------------------
  47.         EIP        ERROR              EIP
  48.   0x04 ---------  ---------          -----------------------
  49.         CS         EIP                CS
  50.   0x08 ---------  ---------          ---------
  51.         EFLAGS     CS                 EFLAGS
  52.   0x0c ---------  ---------          ---------
  53.                    EFLAGS  
  54.   0x10            ---------
  56.         ESF0   or   ESF1              ESF0
  57. .CE
  59. SEE ALSO: excLib(1)
  60. */
  62. #define _ASMLANGUAGE
  63. #include "vxWorks.h"
  64. #include "asm.h"
  65. #include "esf.h"
  66. #include "iv.h"
  69. .data
  70. .globl FUNC(copyright_wind_river)
  71. .long FUNC(copyright_wind_river)
  74.         /* externals */
  76. .globl FUNC(windExit)     /* kernel exit routine */
  77. .globl FUNC(intEnt)     /* interrupt enter routine */
  78. .globl FUNC(intExit)     /* interrupt exit routine */
  81. /* internals */
  83. .globl GTEXT(excCallTbl)   /* call-table */
  84. .globl GTEXT(excStub)     /* uninitialized exception handler */
  85. .globl GTEXT(excIntStub)   /* uninitialized interrupt handler */
  88. .text
  89. .balign 16
  91. /**************************************************************************
  92. *
  93. * excCallTbl - table of Calls
  94. *
  95. * NOMANUAL
  96. */
  98. FUNC_LABEL(excCallTbl)
  99. call FUNC(excStub) /* 0x00 */ /* divide error */
  100. call FUNC(excStub) /* debug */
  101. call FUNC(excStub) /* non-maskable interrupt */
  102. call FUNC(excStub) /* breakpoint */
  103. call FUNC(excStub) /* overflow */
  104. call FUNC(excStub) /* bound */
  105. call FUNC(excStub) /* invalid opcode */
  106. call FUNC(excStub) /* device not available */
  107. call FUNC(excStub) /* double fault */
  108. call FUNC(excStub) /* co-processor overrun */
  109. call FUNC(excStub) /* invalid TSS */
  110. call FUNC(excStub) /* segment not present */
  111. call FUNC(excStub) /* stack fault */
  112. call FUNC(excStub) /* general protection fault */
  113. call FUNC(excStub) /* page fault */
  114. call FUNC(excStub) /* reserved */
  115. call FUNC(excStub) /* 0x10 */ /* co-processor error */
  116. call FUNC(excStub)  /* alignment check */
  117. call FUNC(excStub)  /* machine check */
  118. call FUNC(excStub)  /* streaming SIMD */
  119. call FUNC(excStub)  /* unassigned reserved */
  120. call FUNC(excStub)  /* unassigned reserved */
  121. call FUNC(excStub)  /* unassigned reserved */
  122. call FUNC(excStub)  /* unassigned reserved */
  123. call FUNC(excStub) /* unassigned reserved */
  124. call FUNC(excStub) /* unassigned reserved */
  125. call FUNC(excStub) /* unassigned reserved */
  126. call FUNC(excStub) /* unassigned reserved */
  127. call FUNC(excStub) /* unassigned reserved */
  128. call FUNC(excStub) /* unassigned reserved */
  129. call FUNC(excStub) /* unassigned reserved */
  130. call FUNC(excStub) /* unassigned reserved */
  131. call FUNC(excIntStub) /* 0x20 */ /* User Interrupts */
  132. call FUNC(excIntStub)
  133. call FUNC(excIntStub)
  134. call FUNC(excIntStub)
  135. call FUNC(excIntStub)
  136. call FUNC(excIntStub)
  137. call FUNC(excIntStub)
  138. call FUNC(excIntStub)
  139. call FUNC(excIntStub)
  140. call FUNC(excIntStub)
  141. call FUNC(excIntStub)
  142. call FUNC(excIntStub)
  143. call FUNC(excIntStub)
  144. call FUNC(excIntStub)
  145. call FUNC(excIntStub)
  146. call FUNC(excIntStub)
  147. call FUNC(excIntStub) /* 0x30 */
  148. call FUNC(excIntStub)
  149. call FUNC(excIntStub)
  150. call FUNC(excIntStub)
  151. call FUNC(excIntStub)
  152. call FUNC(excIntStub)
  153. call FUNC(excIntStub)
  154. call FUNC(excIntStub)
  155. call FUNC(excIntStub)
  156. call FUNC(excIntStub)
  157. call FUNC(excIntStub)
  158. call FUNC(excIntStub)
  159. call FUNC(excIntStub)
  160. call FUNC(excIntStub)
  161. call FUNC(excIntStub)
  162. call FUNC(excIntStub)
  163. call FUNC(excIntStub) /* 0x40 */
  164. call FUNC(excIntStub)
  165. call FUNC(excIntStub)
  166. call FUNC(excIntStub)
  167. call FUNC(excIntStub)
  168. call FUNC(excIntStub)
  169. call FUNC(excIntStub)
  170. call FUNC(excIntStub)
  171. call FUNC(excIntStub)
  172. call FUNC(excIntStub)
  173. call FUNC(excIntStub)
  174. call FUNC(excIntStub)
  175. call FUNC(excIntStub)
  176. call FUNC(excIntStub)
  177. call FUNC(excIntStub)
  178. call FUNC(excIntStub)
  179. call FUNC(excIntStub) /* 0x50 */
  180. call FUNC(excIntStub)
  181. call FUNC(excIntStub)
  182. call FUNC(excIntStub)
  183. call FUNC(excIntStub)
  184. call FUNC(excIntStub)
  185. call FUNC(excIntStub)
  186. call FUNC(excIntStub)
  187. call FUNC(excIntStub)
  188. call FUNC(excIntStub)
  189. call FUNC(excIntStub)
  190. call FUNC(excIntStub)
  191. call FUNC(excIntStub)
  192. call FUNC(excIntStub)
  193. call FUNC(excIntStub)
  194. call FUNC(excIntStub)
  195. call FUNC(excIntStub) /* 0x60 */
  196. call FUNC(excIntStub)
  197. call FUNC(excIntStub)
  198. call FUNC(excIntStub)
  199. call FUNC(excIntStub)
  200. call FUNC(excIntStub)
  201. call FUNC(excIntStub)
  202. call FUNC(excIntStub)
  203. call FUNC(excIntStub)
  204. call FUNC(excIntStub)
  205. call FUNC(excIntStub)
  206. call FUNC(excIntStub)
  207. call FUNC(excIntStub)
  208. call FUNC(excIntStub)
  209. call FUNC(excIntStub)
  210. call FUNC(excIntStub)
  211. call FUNC(excIntStub) /* 0x70 */
  212. call FUNC(excIntStub)
  213. call FUNC(excIntStub)
  214. call FUNC(excIntStub)
  215. call FUNC(excIntStub)
  216. call FUNC(excIntStub)
  217. call FUNC(excIntStub)
  218. call FUNC(excIntStub)
  219. call FUNC(excIntStub)
  220. call FUNC(excIntStub)
  221. call FUNC(excIntStub)
  222. call FUNC(excIntStub)
  223. call FUNC(excIntStub)
  224. call FUNC(excIntStub)
  225. call FUNC(excIntStub)
  226. call FUNC(excIntStub)
  227. call FUNC(excIntStub) /* 0x80 */
  228. call FUNC(excIntStub)
  229. call FUNC(excIntStub)
  230. call FUNC(excIntStub)
  231. call FUNC(excIntStub)
  232. call FUNC(excIntStub)
  233. call FUNC(excIntStub)
  234. call FUNC(excIntStub)
  235. call FUNC(excIntStub)
  236. call FUNC(excIntStub)
  237. call FUNC(excIntStub)
  238. call FUNC(excIntStub)
  239. call FUNC(excIntStub)
  240. call FUNC(excIntStub)
  241. call FUNC(excIntStub)
  242. call FUNC(excIntStub)
  243. call FUNC(excIntStub) /* 0x90 */
  244. call FUNC(excIntStub)
  245. call FUNC(excIntStub)
  246. call FUNC(excIntStub)
  247. call FUNC(excIntStub)
  248. call FUNC(excIntStub)
  249. call FUNC(excIntStub)
  250. call FUNC(excIntStub)
  251. call FUNC(excIntStub)
  252. call FUNC(excIntStub)
  253. call FUNC(excIntStub)
  254. call FUNC(excIntStub)
  255. call FUNC(excIntStub)
  256. call FUNC(excIntStub)
  257. call FUNC(excIntStub)
  258. call FUNC(excIntStub)
  259. call FUNC(excIntStub) /* 0xa0 */
  260. call FUNC(excIntStub)
  261. call FUNC(excIntStub)
  262. call FUNC(excIntStub)
  263. call FUNC(excIntStub)
  264. call FUNC(excIntStub)
  265. call FUNC(excIntStub)
  266. call FUNC(excIntStub)
  267. call FUNC(excIntStub)
  268. call FUNC(excIntStub)
  269. call FUNC(excIntStub)
  270. call FUNC(excIntStub)
  271. call FUNC(excIntStub)
  272. call FUNC(excIntStub)
  273. call FUNC(excIntStub)
  274. call FUNC(excIntStub)
  275. call FUNC(excIntStub) /* 0xb0 */
  276. call FUNC(excIntStub)
  277. call FUNC(excIntStub)
  278. call FUNC(excIntStub)
  279. call FUNC(excIntStub)
  280. call FUNC(excIntStub)
  281. call FUNC(excIntStub)
  282. call FUNC(excIntStub)
  283. call FUNC(excIntStub)
  284. call FUNC(excIntStub)
  285. call FUNC(excIntStub)
  286. call FUNC(excIntStub)
  287. call FUNC(excIntStub)
  288. call FUNC(excIntStub)
  289. call FUNC(excIntStub)
  290. call FUNC(excIntStub)
  291. call FUNC(excIntStub) /* 0xc0 */
  292. call FUNC(excIntStub)
  293. call FUNC(excIntStub)
  294. call FUNC(excIntStub)
  295. call FUNC(excIntStub)
  296. call FUNC(excIntStub)
  297. call FUNC(excIntStub)
  298. call FUNC(excIntStub)
  299. call FUNC(excIntStub)
  300. call FUNC(excIntStub)
  301. call FUNC(excIntStub)
  302. call FUNC(excIntStub)
  303. call FUNC(excIntStub)
  304. call FUNC(excIntStub)
  305. call FUNC(excIntStub)
  306. call FUNC(excIntStub)
  307. call FUNC(excIntStub) /* 0xd0 */
  308. call FUNC(excIntStub)
  309. call FUNC(excIntStub)
  310. call FUNC(excIntStub)
  311. call FUNC(excIntStub)
  312. call FUNC(excIntStub)
  313. call FUNC(excIntStub)
  314. call FUNC(excIntStub)
  315. call FUNC(excIntStub)
  316. call FUNC(excIntStub)
  317. call FUNC(excIntStub)
  318. call FUNC(excIntStub)
  319. call FUNC(excIntStub)
  320. call FUNC(excIntStub)
  321. call FUNC(excIntStub)
  322. call FUNC(excIntStub)
  323. call FUNC(excIntStub) /* 0xe0 */
  324. call FUNC(excIntStub)
  325. call FUNC(excIntStub)
  326. call FUNC(excIntStub)
  327. call FUNC(excIntStub)
  328. call FUNC(excIntStub)
  329. call FUNC(excIntStub)
  330. call FUNC(excIntStub)
  331. call FUNC(excIntStub)
  332. call FUNC(excIntStub)
  333. call FUNC(excIntStub)
  334. call FUNC(excIntStub)
  335. call FUNC(excIntStub)
  336. call FUNC(excIntStub)
  337. call FUNC(excIntStub)
  338. call FUNC(excIntStub)
  339. call FUNC(excIntStub) /* 0xf0 */
  340. call FUNC(excIntStub)
  341. call FUNC(excIntStub)
  342. call FUNC(excIntStub)
  343. call FUNC(excIntStub)
  344. call FUNC(excIntStub)
  345. call FUNC(excIntStub)
  346. call FUNC(excIntStub)
  347. call FUNC(excIntStub)
  348. call FUNC(excIntStub)
  349. call FUNC(excIntStub)
  350. call FUNC(excIntStub)
  351. call FUNC(excIntStub)
  352. call FUNC(excIntStub)
  353. call FUNC(excIntStub)
  354. call FUNC(excIntStub)
  356. /*********************************************************************
  357. *
  358. * excStub - exception handler
  359. *
  360. * NOMANUAL
  361. */
  363. .balign 16,0x90
  364. FUNC_LABEL(excStub)
  365. pushfl /* save eflags */
  366. pushal /* save regs */
  367. movl %esp, %ebx /* save pointer to regs */
  369. /* compute vector offset from return address to Call in table */
  371. movl 0x24(%esp), %eax /* get Call return adrs */
  372. subl $4, %eax /* adjust return adrs to be Call adrs */
  373. subl $FUNC(excCallTbl), %eax /* get offset from start of Call table
  374.  * (= vector offset) */
  375. movl $5, %ecx /* turn vector offset into excep num */
  376. cltd
  377. idivl %ecx /* %eax has exception num */
  379. /* check whether the exception stack frame is ESF0 or ESF1 */
  381. cmpl $ IN_DOUBLE_FAULT, %eax
  382. jl excStub1 /* vecNum <   8 , it is ESF0 */
  383. cmpl $ IN_CP_OVERRUN, %eax
  384. je excStub1 /* vecNum ==  9 , it is ESF0 */
  385. cmpl $ IN_RESERVED, %eax
  386. je excStub1 /* vecNum == 15 , it is ESF0 */
  387. cmpl $ IN_CP_ERROR, %eax
  388. je excStub1 /* vecNum == 16 , it is ESF0 */
  389. cmpl $ IN_MACHINE_CHECK, %eax
  390. je excStub1 /* vecNum == 18 , it is ESF0 */
  391. cmpl $ IN_SIMD, %eax
  392. je excStub1 /* vecNum == 19 , it is ESF0 */
  394. /* exception stack frame is ESF1 which has error-code */
  396. movl 0x2c(%esp), %edx /* get pc from ESF */
  397. movl %edx, 0x24(%esp) /* replace a return addr by the pc */
  399. pushl $ TRUE /* push flag (ERROR code) */
  400. pushl %ebx /* push pointer to REG_SET */
  401. addl $0x28, %ebx
  402. pushl %ebx /* push pointer to ESF */
  403. pushl %eax /* push exception number */
  404. call FUNC(excExcHandle)
  405. addl $16, %esp /* clean up pushed arguments */
  407. popal /* restore regs */
  408. addl $12, %esp /* get pointer to ESF */
  409. iret /* retry the instruction */
  412. .balign 16,0x90
  413. excStub1:
  414. /* exception stack frame is ESF0 */
  416. movl 0x28(%esp), %edx /* get pc from ESF */
  417. movl %edx, 0x24(%esp) /* replace a return addr by the pc */
  419. pushl $ FALSE /* push flag (no ERROR code) */
  420. pushl %ebx /* push pointer to REG_SET */
  421. addl $0x28, %ebx
  422. pushl %ebx /* push pointer to ESF */
  423. pushl %eax /* push exception number */
  424. call FUNC(excExcHandle) /* do exception processing */
  425. addl $16, %esp /* clean up pushed arguments */
  427. popal /* restore regs */
  428. addl $8, %esp /* get pointer to ESF */
  429. iret /* retry the instruction */
  432. /*********************************************************************
  433. *
  434. * excIntStub - uninitialized interrupt handler
  435. *
  436. * NOMANUAL
  437. */
  439. .balign 16,0x90
  440. FUNC_LABEL(excIntStub)
  441. popl    %eax                    /* save the return address */
  442. call    FUNC(intEnt)            /* call intEnt */
  443. pushl   %eax                    /* push PC (return address) */
  445. /* create REG_SET on the stack for the Show routine */
  447. pushfl /* save EFLAGS */
  448. pushal /* save regs */
  449. movl %esp, %ebx /* save pointer to REG_SET */
  451. /* compute vector offset from return address to Call in table */
  453. movl 0x24(%esp), %eax /* get Call return adrs */
  454. subl $4, %eax /* adjust return adrs to be Call adrs */
  455. subl $FUNC(excCallTbl), %eax /* get offset from start of Call table
  456.  * (= vector offset) */
  457. movl $5, %ecx /* turn vector offset into excep num */
  458. cltd
  459. idivl %ecx /* %eax has exception num */
  461. /* exception stack frame is ESF0. offset = REG_SET(0x28) + errno(4) */
  463. movl 0x28+4(%esp), %edx /* get pc from ESF */
  464. movl %edx, 0x24(%esp) /* replace a return addr by the pc */
  466. pushl $ FALSE /* push flag (no ERROR code) */
  467. pushl %ebx /* push pointer to REG_SET */
  468. addl $0x28+4, %ebx /* get addr of ESF by adding the offset */
  469. pushl %ebx /* push pointer to ESF */
  470. pushl %eax /* push exception number */
  471. call FUNC(excIntHandle) /* do exception processing */
  472. addl $16, %esp /* clean up pushed arguments */
  474. popal /* restore regs */
  475. addl $8, %esp /* skip EFLAGS, PC to get addr of errno */
  476. jmp FUNC(intExit)