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annotate packages/kernel/current/src/debug/dbg-thread-demux.c @ 143:6b5f480c6929 ecos-sw-2000-12-08
Merge from eCos master repository on 2000-12-08-02:09:36-GMT
| author | jlarmour |
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| date | Fri, 08 Dec 2000 03:30:06 +0000 |
| parents | c37d3a9e1b28 |
| children | e0c0827131d1 |
| rev | line source |
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| 0 | 1 /*========================================================================== |
| 2 // | |
| 3 // dbg-thread-demux.c | |
| 4 // | |
| 5 // GDB Stub ROM system calls | |
| 6 // | |
| 7 //========================================================================== | |
| 8 //####COPYRIGHTBEGIN#### | |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Red Hat eCos Public License |
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12 // Version 1.1 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://www.redhat.com/ |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Configurable Operating System, |
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22 // released September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Red Hat. |
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25 // Portions created by Red Hat are |
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. |
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27 // All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
| 0 | 30 //####COPYRIGHTEND#### |
| 31 //========================================================================== | |
| 32 //#####DESCRIPTIONBEGIN#### | |
| 33 // | |
| 34 // Author(s): nickg | |
| 35 // Contributors: | |
| 36 // Date: 1998-09-03 | |
| 37 // Purpose: GDB Stub ROM system calls | |
| 38 // Description: | |
| 39 // | |
| 40 //####DESCRIPTIONEND#### | |
| 41 // | |
| 42 //========================================================================*/ | |
| 43 | |
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44 #include <cyg/hal/hal_arch.h> |
| 0 | 45 |
| 46 /* This file implements system calls out from the ROM debug stub into | |
| 47 the operating environment. | |
| 48 We assume they exist in the same address space. | |
| 49 This file should be linked into your operating environment, your O.S. | |
| 50 or whatever is managing multiple saved process contexts. | |
| 51 Your O.S. needs to implement and provide | |
| 52 dbg_thread_capabilities | |
| 53 dbg_currthread | |
| 54 dbg_threadlist | |
| 55 dbg_threadinfo | |
| 56 dbg_getthreadreg | |
| 57 dbg_setthreadreg | |
| 58 | |
| 59 The debug stub will call this function by calling it indirectly | |
| 60 vis a pre-assigned location possably somthing like a virtual vector table. | |
| 61 Where this is exactly is platform specific. | |
| 62 | |
| 63 The O.S. should call patch_dbg_syscalls() and pass the address of the | |
| 64 location to be patched with the dbg_thread_syscall_rmt function. | |
| 65 Nothing really calls this by name. | |
| 66 | |
| 67 This scheme would also work if we wanted to use a real trapped system call. | |
| 68 */ | |
| 69 | |
| 70 // ------------------------------------------------------------------------- | |
| 71 | |
| 2 | 72 #include <pkgconf/system.h> // for CYGPKG... and STARTUP |
| 73 | |
| 0 | 74 #include <pkgconf/kernel.h> |
| 75 | |
| 2 | 76 #include <cyg/infra/cyg_type.h> |
| 77 | |
| 0 | 78 #include "cyg/hal/dbg-threads-api.h" |
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79 #include "cyg/hal/dbg-thread-syscall.h" |
| 0 | 80 |
| 81 // ------------------------------------------------------------------------- | |
| 82 | |
| 83 static int dbg_thread_syscall_rmt( | |
| 2 | 84 enum dbg_syscall_ids id, |
| 85 union dbg_thread_syscall_parms * p | |
| 86 ) | |
| 0 | 87 { |
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88 int ret; |
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89 CYGARC_HAL_SAVE_GP(); |
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90 switch (id) |
| 0 | 91 { |
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92 case dbg_null_func : |
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93 ret = 1 ; /* test the syscall apparatus */ |
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94 break; |
| 0 | 95 |
| 96 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 97 case dbg_capabilities_func : | |
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98 ret = dbg_thread_capabilities(p->cap_parms.abilities) ; |
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99 break ; |
| 0 | 100 case dbg_currthread_func : |
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101 ret = dbg_currthread(p->currthread_parms.ref) ; |
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102 break ; |
| 0 | 103 case dbg_threadlist_func : |
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104 ret = dbg_threadlist(p->threadlist_parms.startflag, |
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105 p->threadlist_parms.lastid, |
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106 p->threadlist_parms.nextthreadid) ; |
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107 break ; |
| 0 | 108 case dbg_threadinfo_func : |
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109 ret = dbg_threadinfo(p->info_parms.ref, |
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110 p->info_parms.info ) ; |
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111 break ; |
| 0 | 112 case dbg_getthreadreg_func : |
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113 ret = dbg_getthreadreg(p->reg_parms.thread, |
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114 p->reg_parms.regcount, |
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115 p->reg_parms.registers) ; |
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116 break ; |
| 0 | 117 case dbg_setthreadreg_func : |
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118 ret = dbg_setthreadreg(p->reg_parms.thread, |
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119 p->reg_parms.regcount, |
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120 p->reg_parms.registers) ; |
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121 break ; |
| 2 | 122 case dbg_scheduler_func : |
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123 ret = dbg_scheduler(p->scheduler_parms.thread, |
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124 p->scheduler_parms.lock, |
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125 p->scheduler_parms.mode) ; |
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126 break ; |
| 0 | 127 #endif /* CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT */ |
| 128 default : | |
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129 ret = 0 ; /* failure due to non-implementation */ |
| 0 | 130 } |
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131 CYGARC_HAL_RESTORE_GP(); |
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132 return ret; |
| 0 | 133 } |
| 134 | |
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135 |
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136 // Note: This constant is the same as the one defined in hal_if.h: |
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137 // #define CYGNUM_CALL_IF_DBG_SYSCALL 15 |
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138 // But we don't have the hal_if on all the platforms we support this |
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139 // intercalling on. Maintaining backwards compatibility is so much fun! |
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140 |
| 2 | 141 #define DBG_SYSCALL_THREAD_VEC_NUM 15 |
| 142 | |
| 143 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 144 | |
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145 #ifdef CYGPKG_HAL_SPARCLITE_SLEB |
| 2 | 146 # include <cyg/hal/hal_cygm.h> |
| 147 # ifdef CYG_HAL_USE_ROM_MONITOR_CYGMON | |
| 148 // then we support talking to CygMon... | |
| 149 # undef DBG_SYSCALL_THREAD_VEC_NUM | |
| 150 # define DBG_SYSCALL_THREAD_VEC_NUM BSP_VEC_MT_DEBUG | |
| 151 # endif | |
| 152 // otherwise this code is wrong for SPARClite but also not used. | |
| 153 #endif | |
| 154 | |
| 155 #endif | |
| 156 | |
| 0 | 157 void patch_dbg_syscalls(void * vector) |
| 158 { | |
| 159 dbg_syscall_func * f ; | |
| 160 f = vector ; | |
| 2 | 161 |
| 162 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 163 | |
| 164 f[DBG_SYSCALL_THREAD_VEC_NUM] = dbg_thread_syscall_rmt ; | |
| 165 | |
| 166 #endif | |
| 167 | |
| 0 | 168 } |
| 169 | |
| 170 // ------------------------------------------------------------------------- | |
| 171 // End of dbg-thread-demux.c |
