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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [librdbg/] [src/] [powerpc/] [rdbg_f.c] - Blame information for rev 228

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1 30 unneback 
/*
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 **************************************************************************
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 *
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 * Component =
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 *
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 * Synopsis  =   rdbg/powerpc/rdbg_f.c
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 *
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 * $Id: rdbg_f.c,v 1.2 2001-09-27 12:02:02 chris Exp $
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 *
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 **************************************************************************
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 */
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#include <assert.h>
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#include <errno.h>
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#include <rdbg/reg.h>
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#include <rdbg/remdeb.h>
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#include <rdbg/rdbg.h>
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#include <rtems/score/cpu.h>
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#include <rtems/score/thread.h>
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#include <libcpu/cpu.h>
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void
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CtxToRegs (const CPU_Exception_frame* ctx, xdr_regs* regs)
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{
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  * ((CPU_Exception_frame*) regs) = *ctx;
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}
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    void
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RegsToCtx (const xdr_regs* regs, CPU_Exception_frame* ctx)
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{
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  *ctx = * ((CPU_Exception_frame*) regs);
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}
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void
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get_ctx_thread( Thread_Control *thread, CPU_Exception_frame* ctx)
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{
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  unsigned int *ptr;
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  unsigned int i;
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  ctx->EXC_SRR0 = thread->Registers.pc;
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  ctx->EXC_SRR1 = thread->Registers.msr;
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  ctx->_EXC_number = 0xdeadbeef;
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  ctx->GPR1     = thread->Registers.gpr1;
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  ctx->GPR2     = thread->Registers.gpr2;
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  /*
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   * Fill with dummy values...
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   */
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  ptr = &ctx->GPR3;
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  for (i = 0; i < 10; i++)
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    ptr [i] = 0xdeadbeef;
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  ctx->GPR13    = thread->Registers.gpr13;
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  ctx->GPR14    = thread->Registers.gpr14;
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  ctx->GPR15    = thread->Registers.gpr15;
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  ctx->GPR16    = thread->Registers.gpr16;
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  ctx->GPR17    = thread->Registers.gpr17;
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  ctx->GPR18    = thread->Registers.gpr18;
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  ctx->GPR19    = thread->Registers.gpr19;
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  ctx->GPR20    = thread->Registers.gpr20;
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  ctx->GPR21    = thread->Registers.gpr21;
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  ctx->GPR22    = thread->Registers.gpr22;
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  ctx->GPR23    = thread->Registers.gpr23;
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  ctx->GPR24    = thread->Registers.gpr24;
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  ctx->GPR25    = thread->Registers.gpr25;
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  ctx->GPR26    = thread->Registers.gpr26;
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  ctx->GPR27    = thread->Registers.gpr27;
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  ctx->GPR28    = thread->Registers.gpr28;
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  ctx->GPR29    = thread->Registers.gpr29;
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  ctx->GPR30    = thread->Registers.gpr30;
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  ctx->GPR31    = thread->Registers.gpr31;
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  ctx->EXC_CR   = thread->Registers.cr;
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  ctx->EXC_CTR  = 0xdeadbeef;
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  ctx->EXC_XER  = 0xdeadbeef;
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  ctx->EXC_LR   = 0xdeadbeef;
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  ctx->EXC_MSR  = 0xdeadbeef;
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  ctx->EXC_DAR  = 0xdeadbeef;
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}
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void
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set_ctx_thread( Thread_Control *thread, CPU_Exception_frame* ctx)
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{
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  thread->Registers.gpr1        = ctx->GPR1;
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  thread->Registers.gpr2        = ctx->GPR2;
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  thread->Registers.gpr13       = ctx->GPR13;
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  thread->Registers.gpr14       = ctx->GPR14;
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  thread->Registers.gpr15       = ctx->GPR15;
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  thread->Registers.gpr16       = ctx->GPR16;
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  thread->Registers.gpr17       = ctx->GPR17;
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  thread->Registers.gpr18       = ctx->GPR18;
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  thread->Registers.gpr19       = ctx->GPR19;
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  thread->Registers.gpr20       = ctx->GPR20;
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  thread->Registers.gpr21       = ctx->GPR21;
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  thread->Registers.gpr22       = ctx->GPR22;
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  thread->Registers.gpr23       = ctx->GPR23;
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  thread->Registers.gpr24       = ctx->GPR24;
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  thread->Registers.gpr25       = ctx->GPR25;
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  thread->Registers.gpr26       = ctx->GPR26;
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  thread->Registers.gpr27       = ctx->GPR27;
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  thread->Registers.gpr28       = ctx->GPR28;
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  thread->Registers.gpr29       = ctx->GPR29;
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  thread->Registers.gpr30       = ctx->GPR30;
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  thread->Registers.gpr31       = ctx->GPR31;
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  thread->Registers.cr          = ctx->EXC_CR;
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  thread->Registers.pc          = ctx->EXC_SRR0;
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  thread->Registers.msr         = ctx->EXC_SRR1;
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}
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int
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Single_Step(CPU_Exception_frame* ctx)
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{
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  if ((ctx->EXC_SRR1 & MSR_SE) != 0  ||  ExitForSingleStep != 0) {
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    /* Check coherency */
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    assert ((ctx->EXC_SRR1 & MSR_SE) != 0);
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    assert (ExitForSingleStep != 0);
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    return 0;
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  }
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  ctx->EXC_SRR1 |= MSR_SE;
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  ++ExitForSingleStep;
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  return 0;
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}
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 int
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CheckForSingleStep (CPU_Exception_frame* ctx)
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{
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    if (ExitForSingleStep) {
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            /*
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             *  This functions can be called both from
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             *  INT1 and INT3 handlers. In case it is
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             *  called from INT3, need to clear TF.
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             */
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        ctx->EXC_SRR1 &= ~MSR_SE;
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        ExitForSingleStep = 0;
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        return 1;
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    }
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    return 0;
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}
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void
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CancelSingleStep (CPU_Exception_frame* ctx)
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{
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        /* Cancel scheduled SS */
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  ctx->EXC_SRR1 &= ~MSR_SE;
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  ExitForSingleStep-- ;
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}
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cpuExcHandlerType oldExcHandler;
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void connect_rdbg_exception()
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{
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 oldExcHandler = globalExceptHdl;
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 globalExceptHdl = BreakPointExcHdl ;
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}

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