Mercurial > flash_v2
annotate packages/kernel/current/src/debug/dbg-thread-demux.c @ 6:d376b777e2ce ecos-sw-1999-05-14
Merge from eCos master repository on 1999-05-14-19:27:43-BST
| author | jlarmour |
|---|---|
| date | Fri, 14 May 1999 12:20:00 +0000 |
| parents | 443894e2e912 |
| children | c38311975d4f |
| rev | line source |
|---|---|
| 0 | 1 /*========================================================================== |
| 2 // | |
| 3 // dbg-thread-demux.c | |
| 4 // | |
| 5 // GDB Stub ROM system calls | |
| 6 // | |
| 7 //========================================================================== | |
| 8 //####COPYRIGHTBEGIN#### | |
| 9 // | |
| 10 // ------------------------------------------- | |
| 11 // The contents of this file are subject to the Cygnus eCos Public License | |
| 12 // Version 1.0 (the "License"); you may not use this file except in | |
| 13 // compliance with the License. You may obtain a copy of the License at | |
| 14 // http://sourceware.cygnus.com/ecos | |
| 15 // | |
| 16 // Software distributed under the License is distributed on an "AS IS" | |
| 17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the | |
| 18 // License for the specific language governing rights and limitations under | |
| 19 // the License. | |
| 20 // | |
| 21 // The Original Code is eCos - Embedded Cygnus Operating System, released | |
| 22 // September 30, 1998. | |
| 23 // | |
| 24 // The Initial Developer of the Original Code is Cygnus. Portions created | |
| 2 | 25 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. |
| 0 | 26 // ------------------------------------------- |
| 27 // | |
| 28 //####COPYRIGHTEND#### | |
| 29 //========================================================================== | |
| 30 //#####DESCRIPTIONBEGIN#### | |
| 31 // | |
| 32 // Author(s): nickg | |
| 33 // Contributors: | |
| 34 // Date: 1998-09-03 | |
| 35 // Purpose: GDB Stub ROM system calls | |
| 36 // Description: | |
| 37 // | |
| 38 //####DESCRIPTIONEND#### | |
| 39 // | |
| 40 //========================================================================*/ | |
| 41 | |
| 42 | |
| 43 /* This file implements system calls out from the ROM debug stub into | |
| 44 the operating environment. | |
| 45 We assume they exist in the same address space. | |
| 46 This file should be linked into your operating environment, your O.S. | |
| 47 or whatever is managing multiple saved process contexts. | |
| 48 Your O.S. needs to implement and provide | |
| 49 dbg_thread_capabilities | |
| 50 dbg_currthread | |
| 51 dbg_threadlist | |
| 52 dbg_threadinfo | |
| 53 dbg_getthreadreg | |
| 54 dbg_setthreadreg | |
| 55 | |
| 56 The debug stub will call this function by calling it indirectly | |
| 57 vis a pre-assigned location possably somthing like a virtual vector table. | |
| 58 Where this is exactly is platform specific. | |
| 59 | |
| 60 The O.S. should call patch_dbg_syscalls() and pass the address of the | |
| 61 location to be patched with the dbg_thread_syscall_rmt function. | |
| 62 Nothing really calls this by name. | |
| 63 | |
| 64 This scheme would also work if we wanted to use a real trapped system call. | |
| 65 */ | |
| 66 | |
| 67 // ------------------------------------------------------------------------- | |
| 68 | |
| 2 | 69 #include <pkgconf/system.h> // for CYGPKG... and STARTUP |
| 70 | |
| 0 | 71 #include <pkgconf/kernel.h> |
| 72 | |
| 2 | 73 #include <cyg/infra/cyg_type.h> |
| 74 | |
| 0 | 75 #include "cyg/hal/dbg-threads-api.h" |
|
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76 #include "cyg/hal/dbg-thread-syscall.h" |
| 0 | 77 |
| 78 // ------------------------------------------------------------------------- | |
| 79 | |
| 80 static int dbg_thread_syscall_rmt( | |
| 2 | 81 enum dbg_syscall_ids id, |
| 82 union dbg_thread_syscall_parms * p | |
| 83 ) | |
| 0 | 84 { |
| 85 switch (id) | |
| 86 { | |
| 87 case dbg_null_func : return 1 ; /* test the syscall apparatus */ | |
| 88 | |
| 89 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 90 case dbg_capabilities_func : | |
| 91 return dbg_thread_capabilities(p->cap_parms.abilities) ; | |
| 92 break ; | |
| 93 case dbg_currthread_func : | |
| 94 return dbg_currthread(p->currthread_parms.ref) ; | |
| 95 break ; | |
| 96 case dbg_threadlist_func : | |
| 97 return dbg_threadlist(p->threadlist_parms.startflag, | |
| 2 | 98 p->threadlist_parms.lastid, |
| 99 p->threadlist_parms.nextthreadid) ; | |
| 0 | 100 break ; |
| 101 case dbg_threadinfo_func : | |
| 102 return dbg_threadinfo(p->info_parms.ref, | |
| 2 | 103 p->info_parms.info |
| 104 ) ; | |
| 0 | 105 break ; |
| 106 case dbg_getthreadreg_func : | |
| 107 return dbg_getthreadreg(p->reg_parms.thread, | |
| 2 | 108 p->reg_parms.regcount, |
| 109 p->reg_parms.registers) ; | |
| 0 | 110 break ; |
| 111 case dbg_setthreadreg_func : | |
| 112 return dbg_setthreadreg(p->reg_parms.thread, | |
| 2 | 113 p->reg_parms.regcount, |
| 114 p->reg_parms.registers) ; | |
| 115 break ; | |
| 116 case dbg_scheduler_func : | |
| 117 return dbg_scheduler(p->scheduler_parms.thread, | |
| 118 p->scheduler_parms.lock, | |
| 119 p->scheduler_parms.mode) ; | |
| 0 | 120 break ; |
| 121 #endif /* CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT */ | |
| 122 default : | |
| 123 return 0 ; /* failure tue to non-implementation */ | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 // ------------------------------------------------------------------------- | |
|
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d376b777e2ce
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jlarmour
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128 // When Cygmon calls us on the MIPS It has its own value in GP. We need to |
| 0 | 129 // save that and set our own before proceeding. |
| 130 | |
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131 #ifdef CYGPKG_HAL_MIPS |
| 0 | 132 static int dbg_thread_syscall_rmt_1( |
| 2 | 133 enum dbg_syscall_ids id, |
| 134 union dbg_thread_syscall_parms * p | |
| 135 ) | |
| 0 | 136 { |
| 137 | |
| 138 register long gp_save; | |
| 139 int r; | |
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d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
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140 asm volatile ( "move %0,$28;" |
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d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
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141 ".extern _gp;" |
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d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
jlarmour
parents:
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diff
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142 "la $gp,_gp;" |
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d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
jlarmour
parents:
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diff
changeset
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143 : "=r"(gp_save) |
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d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
jlarmour
parents:
2
diff
changeset
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144 ); |
| 0 | 145 |
| 146 r = dbg_thread_syscall_rmt( id, p ); | |
| 147 | |
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6
d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
jlarmour
parents:
2
diff
changeset
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148 asm volatile ( "move $gp,%0;" :: "r"(gp_save) ); |
| 0 | 149 |
| 150 return r; | |
| 151 | |
| 152 } | |
| 153 #endif | |
| 154 | |
| 155 // ------------------------------------------------------------------------- | |
| 156 | |
| 2 | 157 #define DBG_SYSCALL_THREAD_VEC_NUM 15 |
| 158 | |
| 159 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 160 | |
| 161 #ifdef CYG_HAL_SPARCLITE_SLEB | |
| 162 # include <cyg/hal/hal_cygm.h> | |
| 163 # ifdef CYG_HAL_USE_ROM_MONITOR_CYGMON | |
| 164 // then we support talking to CygMon... | |
| 165 # undef DBG_SYSCALL_THREAD_VEC_NUM | |
| 166 # define DBG_SYSCALL_THREAD_VEC_NUM BSP_VEC_MT_DEBUG | |
| 167 # endif | |
| 168 // otherwise this code is wrong for SPARClite but also not used. | |
| 169 #endif | |
| 170 | |
| 171 #endif | |
| 172 | |
| 0 | 173 void patch_dbg_syscalls(void * vector) |
| 174 { | |
| 175 dbg_syscall_func * f ; | |
| 176 f = vector ; | |
| 2 | 177 |
| 178 #ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT | |
| 179 | |
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6
d376b777e2ce
Merge from eCos master repository on 1999-05-14-19:27:43-BST
jlarmour
parents:
2
diff
changeset
|
180 #ifdef CYGPKG_HAL_MIPS |
| 2 | 181 f[DBG_SYSCALL_THREAD_VEC_NUM] = dbg_thread_syscall_rmt_1 ; |
| 0 | 182 #else |
| 2 | 183 f[DBG_SYSCALL_THREAD_VEC_NUM] = dbg_thread_syscall_rmt ; |
| 184 #endif | |
| 185 | |
| 186 #endif | |
| 187 | |
| 0 | 188 } |
| 189 | |
| 190 // ------------------------------------------------------------------------- | |
| 191 // End of dbg-thread-demux.c |