[981b99f] | 1 | /* |
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| 2 | ************************************************************************** |
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| 3 | * |
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| 4 | * Component = |
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| 5 | * |
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| 6 | * Synopsis = rdbg/powerpc/rdbg_f.c |
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| 7 | * |
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| 8 | * $Id$ |
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| 9 | * |
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| 10 | ************************************************************************** |
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| 11 | */ |
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| 12 | |
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| 13 | #include <assert.h> |
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| 14 | #include <errno.h> |
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| 15 | #include <rdbg/reg.h> |
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| 16 | #include <rdbg/remdeb.h> |
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| 17 | #include <rdbg/rdbg.h> |
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| 18 | #include <rtems/score/cpu.h> |
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| 19 | #include <rtems/score/thread.h> |
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| 20 | #include <libcpu/cpu.h> |
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| 21 | |
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| 22 | void |
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| 23 | CtxToRegs (const CPU_Exception_frame* ctx, xdr_regs* regs) |
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| 24 | { |
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| 25 | * ((CPU_Exception_frame*) regs) = *ctx; |
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| 26 | } |
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| 27 | |
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| 28 | |
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| 29 | void |
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| 30 | RegsToCtx (const xdr_regs* regs, CPU_Exception_frame* ctx) |
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| 31 | { |
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| 32 | *ctx = * ((CPU_Exception_frame*) regs); |
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| 33 | } |
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| 34 | |
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| 35 | void |
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| 36 | get_ctx_thread( Thread_Control *thread, CPU_Exception_frame* ctx) |
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| 37 | { |
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| 38 | unsigned int *ptr; |
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| 39 | unsigned int i; |
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| 40 | |
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| 41 | ctx->EXC_SRR0 = thread->Registers.pc; |
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| 42 | ctx->EXC_SRR1 = thread->Registers.msr; |
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| 43 | ctx->_EXC_number = 0xdeadbeef; |
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| 44 | |
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| 45 | ctx->GPR1 = thread->Registers.gpr1; |
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| 46 | ctx->GPR2 = thread->Registers.gpr2; |
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| 47 | /* |
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| 48 | * Fill with dummy values... |
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| 49 | */ |
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| 50 | ptr = &ctx->GPR3; |
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| 51 | for (i = 0; i < 10; i++) |
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| 52 | ptr [i] = 0xdeadbeef; |
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| 53 | |
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| 54 | ctx->GPR13 = thread->Registers.gpr13; |
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| 55 | ctx->GPR14 = thread->Registers.gpr14; |
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| 56 | ctx->GPR15 = thread->Registers.gpr15; |
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| 57 | ctx->GPR16 = thread->Registers.gpr16; |
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| 58 | ctx->GPR17 = thread->Registers.gpr17; |
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| 59 | ctx->GPR18 = thread->Registers.gpr18; |
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| 60 | ctx->GPR19 = thread->Registers.gpr19; |
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| 61 | ctx->GPR20 = thread->Registers.gpr20; |
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| 62 | ctx->GPR21 = thread->Registers.gpr21; |
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| 63 | ctx->GPR22 = thread->Registers.gpr22; |
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| 64 | ctx->GPR23 = thread->Registers.gpr23; |
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| 65 | ctx->GPR24 = thread->Registers.gpr24; |
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| 66 | ctx->GPR25 = thread->Registers.gpr25; |
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| 67 | ctx->GPR26 = thread->Registers.gpr26; |
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| 68 | ctx->GPR27 = thread->Registers.gpr27; |
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| 69 | ctx->GPR28 = thread->Registers.gpr28; |
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| 70 | ctx->GPR29 = thread->Registers.gpr29; |
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| 71 | ctx->GPR30 = thread->Registers.gpr30; |
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| 72 | ctx->GPR31 = thread->Registers.gpr31; |
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| 73 | ctx->EXC_CR = thread->Registers.cr; |
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| 74 | ctx->EXC_CTR = 0xdeadbeef; |
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| 75 | ctx->EXC_XER = 0xdeadbeef; |
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| 76 | ctx->EXC_LR = 0xdeadbeef; |
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| 77 | ctx->EXC_MSR = 0xdeadbeef; |
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| 78 | ctx->EXC_DAR = 0xdeadbeef; |
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| 79 | } |
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| 80 | |
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| 81 | void |
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| 82 | set_ctx_thread( Thread_Control *thread, CPU_Exception_frame* ctx) |
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| 83 | { |
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| 84 | thread->Registers.gpr1 = ctx->GPR1; |
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| 85 | thread->Registers.gpr2 = ctx->GPR2; |
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| 86 | |
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| 87 | thread->Registers.gpr13 = ctx->GPR13; |
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| 88 | thread->Registers.gpr14 = ctx->GPR14; |
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| 89 | thread->Registers.gpr15 = ctx->GPR15; |
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| 90 | thread->Registers.gpr16 = ctx->GPR16; |
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| 91 | thread->Registers.gpr17 = ctx->GPR17; |
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| 92 | thread->Registers.gpr18 = ctx->GPR18; |
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| 93 | thread->Registers.gpr19 = ctx->GPR19; |
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| 94 | thread->Registers.gpr20 = ctx->GPR20; |
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| 95 | thread->Registers.gpr21 = ctx->GPR21; |
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| 96 | thread->Registers.gpr22 = ctx->GPR22; |
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| 97 | thread->Registers.gpr23 = ctx->GPR23; |
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| 98 | thread->Registers.gpr24 = ctx->GPR24; |
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| 99 | thread->Registers.gpr25 = ctx->GPR25; |
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| 100 | thread->Registers.gpr26 = ctx->GPR26; |
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| 101 | thread->Registers.gpr27 = ctx->GPR27; |
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| 102 | thread->Registers.gpr28 = ctx->GPR28; |
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| 103 | thread->Registers.gpr29 = ctx->GPR29; |
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| 104 | thread->Registers.gpr30 = ctx->GPR30; |
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| 105 | thread->Registers.gpr31 = ctx->GPR31; |
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| 106 | thread->Registers.cr = ctx->EXC_CR; |
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| 107 | thread->Registers.pc = ctx->EXC_SRR0; |
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| 108 | thread->Registers.msr = ctx->EXC_SRR1; |
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| 109 | } |
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| 110 | |
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| 111 | |
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| 112 | |
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| 113 | int |
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| 114 | Single_Step(CPU_Exception_frame* ctx) |
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| 115 | { |
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| 116 | if ((ctx->EXC_SRR1 & MSR_SE) != 0 || ExitForSingleStep != 0) { |
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| 117 | /* Check coherency */ |
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| 118 | assert ((ctx->EXC_SRR1 & MSR_SE) != 0); |
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| 119 | assert (ExitForSingleStep != 0); |
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| 120 | return 0; |
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| 121 | } |
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| 122 | ctx->EXC_SRR1 |= MSR_SE; |
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| 123 | ++ExitForSingleStep; |
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| 124 | return 0; |
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| 125 | } |
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| 126 | |
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| 127 | int |
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| 128 | CheckForSingleStep (CPU_Exception_frame* ctx) |
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| 129 | { |
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| 130 | if (ExitForSingleStep) { |
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| 131 | /* |
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| 132 | * This functions can be called both from |
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| 133 | * INT1 and INT3 handlers. In case it is |
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| 134 | * called from INT3, need to clear TF. |
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| 135 | */ |
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| 136 | ctx->EXC_SRR1 &= ~MSR_SE; |
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| 137 | ExitForSingleStep = 0; |
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| 138 | return 1; |
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| 139 | } |
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| 140 | return 0; |
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| 141 | } |
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| 142 | |
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| 143 | void |
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| 144 | CancelSingleStep (CPU_Exception_frame* ctx) |
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| 145 | { |
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| 146 | /* Cancel scheduled SS */ |
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| 147 | ctx->EXC_SRR1 &= ~MSR_SE; |
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| 148 | ExitForSingleStep-- ; |
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| 149 | } |
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| 150 | cpuExcHandlerType oldExcHandler; |
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| 151 | |
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| 152 | void connect_rdbg_exception() |
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| 153 | { |
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| 154 | oldExcHandler = globalExceptHdl; |
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| 155 | globalExceptHdl = BreakPointExcHdl ; |
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| 156 | } |
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