diff options
Diffstat (limited to 'c/src/librdbg/src/i386/excep.c')
| -rw-r--r-- | c/src/librdbg/src/i386/excep.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/c/src/librdbg/src/i386/excep.c b/c/src/librdbg/src/i386/excep.c index 497c804e70..e69de29bb2 100644 --- a/c/src/librdbg/src/i386/excep.c +++ b/c/src/librdbg/src/i386/excep.c @@ -1,233 +0,0 @@ -/* - ************************************************************************** - * - * Component = - * - * Synopsis = rdbg/i386/excep.c - * - ************************************************************************** - */ - -#include <rtems.h> -#include <rtems/error.h> -#include <rdbg/rdbg_f.h> -#include <assert.h> -#include <errno.h> -#include <rdbg/rdbg.h> -#include <rdbg/servrpc.h> - - -extern rtems_id serializeSemId; -extern rtems_id wakeupEventSemId; - - -unsigned int NbExceptCtx; -volatile unsigned int NbSerializedCtx; -Exception_context *FirstCtx = NULL; -Exception_context *LastCtx = NULL; - -CPU_Exception_frame SavedContext; - - -/********* Save an exception context at the end of a list *****/ - -int PushExceptCtx ( Objects_Id Id, Objects_Id semId, CPU_Exception_frame *ctx ) { - - Exception_context *SaveCtx; - - SaveCtx = (Exception_context *)malloc(sizeof(Exception_context)); - if (SaveCtx == NULL) - rtems_panic("Can't allocate memory to save Exception context"); - - SaveCtx->id = Id; - SaveCtx->ctx = ctx; - SaveCtx->semaphoreId = semId; - SaveCtx->previous = NULL; - SaveCtx->next = NULL; - - if (FirstCtx == NULL){ /* initialization */ - FirstCtx = SaveCtx; - LastCtx = SaveCtx; - NbExceptCtx = 1; - } - else { - NbExceptCtx ++; - LastCtx->next = SaveCtx; - SaveCtx->previous = LastCtx; - LastCtx = SaveCtx; - } - return 0; -} - -/********* Save an temporary exception context in a ******/ -/********* global variable ******/ - -int PushSavedExceptCtx ( Objects_Id Id, CPU_Exception_frame *ctx ) { - - memcpy (&(SavedContext), ctx, sizeof(CPU_Exception_frame)); - return 0; -} - - -/****** Remove the context of the specified Id thread *********/ -/****** If Id = -1, then return the first context *********/ - - -int PopExceptCtx ( Objects_Id Id ) { - - Exception_context *ExtractCtx; - - if (FirstCtx == NULL) return -1; - - if (Id == -1) { - ExtractCtx = LastCtx; - LastCtx = LastCtx->previous; - free(ExtractCtx); - NbExceptCtx --; - return 0; - } - - ExtractCtx = LastCtx; - - while (ExtractCtx->id != Id && ExtractCtx != NULL) { - ExtractCtx = ExtractCtx->previous; - } - - if (ExtractCtx == NULL) - return -1; - - if ( ExtractCtx->previous != NULL) - (ExtractCtx->previous)->next = ExtractCtx->next; - - if ( ExtractCtx->next != NULL) - (ExtractCtx->next)->previous = ExtractCtx->previous; - - if (ExtractCtx == FirstCtx) - FirstCtx = FirstCtx->next; - else - if (ExtractCtx == LastCtx) - LastCtx = LastCtx->previous; - - free(ExtractCtx); - NbExceptCtx --; - return 0; -} - -/****** Return the context of the specified Id thread *********/ -/****** If Id = -1, then return the first context *********/ - - -Exception_context *GetExceptCtx ( Objects_Id Id ) { - - Exception_context *ExtractCtx; - - if (FirstCtx == NULL) return NULL; - - if (Id == -1) { - return LastCtx; - } - - ExtractCtx = LastCtx; - - while (ExtractCtx->id != Id && ExtractCtx != NULL) { - ExtractCtx = ExtractCtx->previous; - } - - if (ExtractCtx == NULL) - return NULL; - - return ExtractCtx; -} - -/*----- Breakpoint Exception management -----*/ - - /* - * Handler for Breakpoint Exceptions : - * software breakpoints. - */ - -void -BreakPointExcHdl(CPU_Exception_frame *ctx) -{ - rtems_status_code status; - rtems_id continueSemId; - - if ( (justSaveContext) && (ctx->idtIndex == I386_EXCEPTION_ENTER_RDBG) ) { - PushSavedExceptCtx (_Thread_Executing->Object.id, ctx); - justSaveContext = 0; - } - else { - if (ctx->idtIndex != I386_EXCEPTION_DEBUG){ - NbSerializedCtx++; - rtems_semaphore_obtain(serializeSemId, RTEMS_WAIT, RTEMS_NO_TIMEOUT); - NbSerializedCtx--; - } - - currentTargetThread = _Thread_Executing->Object.id; - -#ifdef DDEBUG - printk("----------------------------------------------------------\n"); - printk("Exception %d caught at PC %x by thread %d\n", - ctx->idtIndex, - ctx->eip, - _Thread_Executing->Object.id); - printk("----------------------------------------------------------\n"); - printk("Processor execution context at time of the fault was :\n"); - printk("----------------------------------------------------------\n"); - printk(" EAX = %x EBX = %x ECX = %x EDX = %x\n", - ctx->eax, ctx->ebx, ctx->ecx, ctx->edx); - printk(" ESI = %x EDI = %x EBP = %x ESP = %x\n", - ctx->esi, ctx->edi, ctx->ebp, ctx->esp0); - printk("----------------------------------------------------------\n"); - printk("Error code pushed by processor itself (if not 0) = %x\n", - ctx->faultCode); - printk("----------------------------------------------------------\n\n"); -#endif - - status = rtems_semaphore_create (rtems_build_name('D', 'B', 'G', 'c'), - 0, - RTEMS_FIFO | - RTEMS_COUNTING_SEMAPHORE | - RTEMS_NO_INHERIT_PRIORITY | - RTEMS_NO_PRIORITY_CEILING | - RTEMS_LOCAL, - 0, - &continueSemId); - if (status != RTEMS_SUCCESSFUL) - rtems_panic ("Can't create continue semaphore: `%s'\n",rtems_status_text(status)); - - PushExceptCtx (_Thread_Executing->Object.id, continueSemId, ctx); - - switch (ctx->idtIndex){ - case I386_EXCEPTION_DEBUG: - DPRINTF((" DEBUG EXCEPTION !!!\n")); - ctx->eflags &= ~EFLAGS_TF; - ExitForSingleStep-- ; - rtems_semaphore_release( wakeupEventSemId ); - break; - - case I386_EXCEPTION_BREAKPOINT: - DPRINTF((" BREAKPOINT EXCEPTION !!!\n")); - rtems_semaphore_release( wakeupEventSemId ); - break; - - case I386_EXCEPTION_ENTER_RDBG: - DPRINTF((" ENTER RDBG !!!\n")); - rtems_semaphore_release( wakeupEventSemId ); - break; - - default: - DPRINTF((" OTHER EXCEPTION !!!\n")); - rtems_semaphore_release( wakeupEventSemId ); - break; - } - - rtems_semaphore_obtain(continueSemId, RTEMS_WAIT, RTEMS_NO_TIMEOUT); - - PopExceptCtx (_Thread_Executing->Object.id); - rtems_semaphore_delete(continueSemId); - } -} - - - |