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annotate packages/kernel/current/src/debug/dbg-thread-demux.c @ 64:c38311975d4f ecos-sw-2000-01-28
Merge from eCos master repository on 2000-01-28-04:28:11-GMT
| author | jlarmour |
|---|---|
| date | Fri, 28 Jan 2000 04:59:39 +0000 |
| parents | d376b777e2ce |
| children | bf00f99aec69 |
| rev | line source |
|---|---|
| 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 1.0 (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://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an |
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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 | |
| 44 | |
| 45 /* This file implements system calls out from the ROM debug stub into | |
| 46 the operating environment. | |
| 47 We assume they exist in the same address space. | |
| 48 This file should be linked into your operating environment, your O.S. | |
| 49 or whatever is managing multiple saved process contexts. | |
| 50 Your O.S. needs to implement and provide | |
| 51 dbg_thread_capabilities | |
| 52 dbg_currthread | |
| 53 dbg_threadlist | |
| 54 dbg_threadinfo | |
| 55 dbg_getthreadreg | |
| 56 dbg_setthreadreg | |
| 57 | |
| 58 The debug stub will call this function by calling it indirectly | |
| 59 vis a pre-assigned location possably somthing like a virtual vector table. | |
| 60 Where this is exactly is platform specific. | |
| 61 | |
| 62 The O.S. should call patch_dbg_syscalls() and pass the address of the | |
| 63 location to be patched with the dbg_thread_syscall_rmt function. | |
| 64 Nothing really calls this by name. | |
| 65 | |
| 66 This scheme would also work if we wanted to use a real trapped system call. | |
| 67 */ | |
| 68 | |
| 69 // ------------------------------------------------------------------------- | |
| 70 | |
| 2 | 71 #include <pkgconf/system.h> // for CYGPKG... and STARTUP |
| 72 | |
| 0 | 73 #include <pkgconf/kernel.h> |
| 74 | |
| 2 | 75 #include <cyg/infra/cyg_type.h> |
| 76 | |
| 0 | 77 #include "cyg/hal/dbg-threads-api.h" |
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78 #include "cyg/hal/dbg-thread-syscall.h" |
| 0 | 79 |
| 80 // ------------------------------------------------------------------------- | |
| 81 | |
| 82 static int dbg_thread_syscall_rmt( | |
| 2 | 83 enum dbg_syscall_ids id, |
| 84 union dbg_thread_syscall_parms * p | |
| 85 ) | |
| 0 | 86 { |
| 87 switch (id) | |
| 88 { | |
| 89 case dbg_null_func : return 1 ; /* test the syscall apparatus */ | |
| 90 | |
| 91 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 92 case dbg_capabilities_func : | |
| 93 return dbg_thread_capabilities(p->cap_parms.abilities) ; | |
| 94 break ; | |
| 95 case dbg_currthread_func : | |
| 96 return dbg_currthread(p->currthread_parms.ref) ; | |
| 97 break ; | |
| 98 case dbg_threadlist_func : | |
| 99 return dbg_threadlist(p->threadlist_parms.startflag, | |
| 2 | 100 p->threadlist_parms.lastid, |
| 101 p->threadlist_parms.nextthreadid) ; | |
| 0 | 102 break ; |
| 103 case dbg_threadinfo_func : | |
| 104 return dbg_threadinfo(p->info_parms.ref, | |
| 2 | 105 p->info_parms.info |
| 106 ) ; | |
| 0 | 107 break ; |
| 108 case dbg_getthreadreg_func : | |
| 109 return dbg_getthreadreg(p->reg_parms.thread, | |
| 2 | 110 p->reg_parms.regcount, |
| 111 p->reg_parms.registers) ; | |
| 0 | 112 break ; |
| 113 case dbg_setthreadreg_func : | |
| 114 return dbg_setthreadreg(p->reg_parms.thread, | |
| 2 | 115 p->reg_parms.regcount, |
| 116 p->reg_parms.registers) ; | |
| 117 break ; | |
| 118 case dbg_scheduler_func : | |
| 119 return dbg_scheduler(p->scheduler_parms.thread, | |
| 120 p->scheduler_parms.lock, | |
| 121 p->scheduler_parms.mode) ; | |
| 0 | 122 break ; |
| 123 #endif /* CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT */ | |
| 124 default : | |
| 125 return 0 ; /* failure tue to non-implementation */ | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 // ------------------------------------------------------------------------- | |
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130 // When Cygmon calls us on the MIPS It has its own value in GP. We need to |
| 0 | 131 // save that and set our own before proceeding. |
| 132 | |
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133 #ifdef CYGPKG_HAL_MIPS |
| 0 | 134 static int dbg_thread_syscall_rmt_1( |
| 2 | 135 enum dbg_syscall_ids id, |
| 136 union dbg_thread_syscall_parms * p | |
| 137 ) | |
| 0 | 138 { |
| 139 | |
| 140 register long gp_save; | |
| 141 int r; | |
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142 asm volatile ( "move %0,$28;" |
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143 ".extern _gp;" |
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144 "la $gp,_gp;" |
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145 : "=r"(gp_save) |
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146 ); |
| 0 | 147 |
| 148 r = dbg_thread_syscall_rmt( id, p ); | |
| 149 | |
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150 asm volatile ( "move $gp,%0;" :: "r"(gp_save) ); |
| 0 | 151 |
| 152 return r; | |
| 153 | |
| 154 } | |
| 155 #endif | |
| 156 | |
| 157 // ------------------------------------------------------------------------- | |
| 158 | |
| 2 | 159 #define DBG_SYSCALL_THREAD_VEC_NUM 15 |
| 160 | |
| 161 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 162 | |
| 163 #ifdef CYG_HAL_SPARCLITE_SLEB | |
| 164 # include <cyg/hal/hal_cygm.h> | |
| 165 # ifdef CYG_HAL_USE_ROM_MONITOR_CYGMON | |
| 166 // then we support talking to CygMon... | |
| 167 # undef DBG_SYSCALL_THREAD_VEC_NUM | |
| 168 # define DBG_SYSCALL_THREAD_VEC_NUM BSP_VEC_MT_DEBUG | |
| 169 # endif | |
| 170 // otherwise this code is wrong for SPARClite but also not used. | |
| 171 #endif | |
| 172 | |
| 173 #endif | |
| 174 | |
| 0 | 175 void patch_dbg_syscalls(void * vector) |
| 176 { | |
| 177 dbg_syscall_func * f ; | |
| 178 f = vector ; | |
| 2 | 179 |
| 180 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 181 | |
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182 #ifdef CYGPKG_HAL_MIPS |
| 2 | 183 f[DBG_SYSCALL_THREAD_VEC_NUM] = dbg_thread_syscall_rmt_1 ; |
| 0 | 184 #else |
| 2 | 185 f[DBG_SYSCALL_THREAD_VEC_NUM] = dbg_thread_syscall_rmt ; |
| 186 #endif | |
| 187 | |
| 188 #endif | |
| 189 | |
| 0 | 190 } |
| 191 | |
| 192 // ------------------------------------------------------------------------- | |
| 193 // End of dbg-thread-demux.c |