| 2ee739cc |
1 | /* |
| 2 | * seh.h |
| 3 | * |
| 4 | * [Generated from seh, 25 September 1996] |
| 5 | */ |
| 6 | |
| 7 | #if !defined(__CC_NORCROFT) || !defined(__arm) |
| 8 | #error You must use the Norcroft ARM Compiler for Sapphire programs |
| 9 | #endif |
| 10 | |
| 11 | #pragma include_only_once |
| 12 | #pragma force_top_level |
| 13 | |
| 14 | #ifndef __seh_h |
| 15 | #define __seh_h |
| 16 | |
| 17 | #ifndef __sapphire_h |
| 18 | #include "sapphire.h" |
| 19 | #endif |
| 20 | |
| 21 | /*----- Overview ----------------------------------------------------------* |
| 22 | * |
| 23 | * Functions provided: |
| 24 | * |
| 25 | * seh_try |
| 26 | * seh_unTry |
| 27 | * seh_throw |
| 28 | * seh_throwErrors |
| 29 | * seh_setListBase |
| 30 | * seh_init |
| 31 | */ |
| 32 | |
| 33 | /* --- seh_try --- * |
| 34 | * |
| 35 | * On entry: R0 == pointer to catch definition block |
| 36 | * |
| 37 | * On exit: R13 dropped by a (small) amount |
| 38 | * |
| 39 | * Use: Inserts an exception handler at the current position. |
| 40 | * Exceptions are matched against those described in the catch |
| 41 | * block. If there is a handler for the exception, the |
| 42 | * corresponding handler is called, and expected to resume |
| 43 | * normally. Otherwise the tidy-up routine is called and we |
| 44 | * unwind the stack further to find an appropriate handler. |
| 45 | * |
| 46 | * The catch block has the following format: |
| 47 | * |
| 48 | * word B to tidy-up routine |
| 49 | * word 1st exception mask |
| 50 | * word 1st B to catch routine |
| 51 | * word 2nd exception mask |
| 52 | * word 2nd B to catch routine |
| 53 | * ... |
| 54 | * word 0 |
| 55 | * |
| 56 | * An exception mask contains two halfwords. Bits 16-31 are the |
| 57 | * class to match, or -1 for all classes. Bits 0-15 are the |
| 58 | * subtype to match, or -1 for all subtypes. You can do really |
| 59 | * odd things if you set bits 16-31 to -1 and leave 0-15 |
| 60 | * matching specific subtypes -- do this at your own risk. |
| 61 | */ |
| 62 | |
| 63 | extern routine seh_try; |
| 64 | |
| 65 | /* --- seh_unTry --- * |
| 66 | * |
| 67 | * On entry: -- |
| 68 | * |
| 69 | * On exit: R13 moved to position before corresponding seh_try |
| 70 | * |
| 71 | * Use: Removes the try block marker in the stack at the current |
| 72 | * position. Note that the stack will be unwound to where it |
| 73 | * was when seh_try was called. |
| 74 | */ |
| 75 | |
| 76 | extern routine seh_unTry; |
| 77 | |
| 78 | /* --- seh_throw --- * |
| 79 | * |
| 80 | * On entry: R0 == exception to match |
| 81 | * R1-R3 == useful bits of information |
| 82 | * |
| 83 | * On exit: Doesn't return, unless you've done something /really/ odd |
| 84 | * |
| 85 | * Use: Throws an exception. The stack is unwound until we find |
| 86 | * a handler which can cope. If there is no handler, we abort |
| 87 | * the program. |
| 88 | */ |
| 89 | |
| 90 | extern routine seh_throw; |
| 91 | |
| 92 | /* --- seh_throwErrors --- * |
| 93 | * |
| 94 | * On entry: -- |
| 95 | * |
| 96 | * On exit: -- |
| 97 | * |
| 98 | * Use: Sets up an except-style error handler to throw errors |
| 99 | * as SEH exceptions. |
| 100 | */ |
| 101 | |
| 102 | extern routine seh_throwErrors; |
| 103 | |
| 104 | /* --- seh_setListBase --- * |
| 105 | * |
| 106 | * On entry: R0 == pointer to try block list base, or 0 to use global |
| 107 | * |
| 108 | * On exit: -- |
| 109 | * |
| 110 | * Use: Sets the try block list base. This should only be used by |
| 111 | * coroutine providers, like coRoutine and thread. |
| 112 | */ |
| 113 | |
| 114 | extern routine seh_setListBase; |
| 115 | |
| 116 | /* --- seh_init --- * |
| 117 | * |
| 118 | * On entry: -- |
| 119 | * |
| 120 | * On exit: -- |
| 121 | * |
| 122 | * Use: Initialises SEH's facilities. |
| 123 | */ |
| 124 | |
| 125 | extern routine seh_init; |
| 126 | |
| 127 | /*----- That's all, folks -------------------------------------------------*/ |
| 128 | |
| 129 | #endif |
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