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-rw-r--r--c/src/librdbg/src/i386/rdbg_f.c213
1 files changed, 113 insertions, 100 deletions
diff --git a/c/src/librdbg/src/i386/rdbg_f.c b/c/src/librdbg/src/i386/rdbg_f.c
index b339256e70..e903309578 100644
--- a/c/src/librdbg/src/i386/rdbg_f.c
+++ b/c/src/librdbg/src/i386/rdbg_f.c
@@ -12,144 +12,157 @@
#include <assert.h>
#include <errno.h>
-#include <rdbg/reg.h>
+#include <rdbg/reg.h>
#include <rdbg/remdeb.h>
#include <rdbg/rdbg.h>
-#include <rtems/score/cpu.h>
-#include <rtems/score/thread.h>
+#include <rtems/score/cpu.h>
+#include <rtems/score/thread.h>
-
-void
-CtxToRegs (const CPU_Exception_frame* ctx, xdr_regs* regs)
+ void
+CtxToRegs (const CPU_Exception_frame * ctx, xdr_regs * regs)
{
- regs->tabreg [GS] = 0;
- regs->tabreg [FS] = 0;
- regs->tabreg [ES] = 0;
- regs->tabreg [DS] = 0;
- regs->tabreg [EDI] = ctx->edi;
- regs->tabreg [ESI] = ctx->esi;
- regs->tabreg [EBP] = ctx->ebp;
- regs->tabreg [ESP] = ctx->esp0;
- regs->tabreg [EBX] = ctx->ebx;
- regs->tabreg [EDX] = ctx->edx;
- regs->tabreg [ECX] = ctx->ecx;
- regs->tabreg [EAX] = ctx->eax;
- regs->tabreg [TRAPNO] = ctx->idtIndex;
- regs->tabreg [ERR] = ctx->faultCode;
- regs->tabreg [EIP] = ctx->eip;
- regs->tabreg [CS] = ctx->cs & 0xFFFF;
- regs->tabreg [EFL] = ctx->eflags;
+ regs->tabreg[GS] = 0;
+ regs->tabreg[FS] = 0;
+ regs->tabreg[ES] = 0;
+ regs->tabreg[DS] = 0;
+ regs->tabreg[EDI] = ctx->edi;
+ regs->tabreg[ESI] = ctx->esi;
+ regs->tabreg[EBP] = ctx->ebp;
+ regs->tabreg[ESP] = ctx->esp0;
+ regs->tabreg[EBX] = ctx->ebx;
+ regs->tabreg[EDX] = ctx->edx;
+ regs->tabreg[ECX] = ctx->ecx;
+ regs->tabreg[EAX] = ctx->eax;
+ regs->tabreg[TRAPNO] = ctx->idtIndex;
+ regs->tabreg[ERR] = ctx->faultCode;
+ regs->tabreg[EIP] = ctx->eip;
+ regs->tabreg[CS] = ctx->cs & 0xFFFF;
+ regs->tabreg[EFL] = ctx->eflags;
}
-
- void
-RegsToCtx (const xdr_regs* regs, CPU_Exception_frame* ctx)
+ void
+RegsToCtx (const xdr_regs * regs, CPU_Exception_frame * ctx)
{
- ctx->edi = regs->tabreg [EDI];
- ctx->esi = regs->tabreg [ESI];
- ctx->ebp = regs->tabreg [EBP];
- ctx->esp0 = regs->tabreg [ESP];
- ctx->ebx = regs->tabreg [EBX];
- ctx->edx = regs->tabreg [EDX];
- ctx->ecx = regs->tabreg [ECX];
- ctx->eax = regs->tabreg [EAX];
- ctx->idtIndex = regs->tabreg [TRAPNO];
- ctx->faultCode = regs->tabreg [ERR];
- ctx->eip = regs->tabreg [EIP];
- ctx->cs = regs->tabreg [CS];
- ctx->eflags = regs->tabreg [EFL];
+ ctx->edi = regs->tabreg[EDI];
+ ctx->esi = regs->tabreg[ESI];
+ ctx->ebp = regs->tabreg[EBP];
+ ctx->esp0 = regs->tabreg[ESP];
+ ctx->ebx = regs->tabreg[EBX];
+ ctx->edx = regs->tabreg[EDX];
+ ctx->ecx = regs->tabreg[ECX];
+ ctx->eax = regs->tabreg[EAX];
+ ctx->idtIndex = regs->tabreg[TRAPNO];
+ ctx->faultCode = regs->tabreg[ERR];
+ ctx->eip = regs->tabreg[EIP];
+ ctx->cs = regs->tabreg[CS];
+ ctx->eflags = regs->tabreg[EFL];
}
-void
-get_ctx_thread( Thread_Control *thread, CPU_Exception_frame* ctx)
+ void
+get_ctx_thread (Thread_Control * thread, CPU_Exception_frame * ctx)
{
- ctx->edi = thread->Registers.edi;
- ctx->esi = thread->Registers.esi;
- ctx->ebp = (unsigned32)(thread->Registers.ebp);
- ctx->esp0 = (unsigned32)(thread->Registers.esp);
- ctx->ebx = thread->Registers.ebx;
- ctx->edx = 0;
- ctx->ecx = 0;
- ctx->eax = 0;
- ctx->idtIndex = 0;
- ctx->faultCode = 0;
- ctx->eip = *(unsigned int*)(thread->Registers.esp);
- ctx->cs = 0;
- ctx->eflags = thread->Registers.eflags;
+ ctx->edi = thread->Registers.edi;
+ ctx->esi = thread->Registers.esi;
+ ctx->ebp = (unsigned32) (thread->Registers.ebp);
+ ctx->esp0 = (unsigned32) (thread->Registers.esp);
+ ctx->ebx = thread->Registers.ebx;
+ ctx->edx = 0;
+ ctx->ecx = 0;
+ ctx->eax = 0;
+ ctx->idtIndex = 0;
+ ctx->faultCode = 0;
+ ctx->eip = *(unsigned int *) (thread->Registers.esp);
+ ctx->cs = 0;
+ ctx->eflags = thread->Registers.eflags;
}
-void
-set_ctx_thread( Thread_Control *thread, CPU_Exception_frame* ctx)
+ void
+set_ctx_thread (Thread_Control * thread, CPU_Exception_frame * ctx)
{
thread->Registers.edi = ctx->edi;
- thread->Registers.esi = ctx->esi;
- thread->Registers.ebp = (void*)(ctx->ebp);
- thread->Registers.esp = (void*)(ctx->esp0);
- thread->Registers.ebx = ctx->ebx;
- thread->Registers.eflags = ctx->eflags;
+ thread->Registers.esi = ctx->esi;
+ thread->Registers.ebp = (void *) (ctx->ebp);
+ thread->Registers.esp = (void *) (ctx->esp0);
+ thread->Registers.ebx = ctx->ebx;
+ thread->Registers.eflags = ctx->eflags;
}
-
-
-int
-Single_Step(CPU_Exception_frame* ctx)
+ int
+Single_Step (CPU_Exception_frame * ctx)
{
- /* Check if not already set */
- if ((ctx->eflags & EFLAGS_TF) != 0 || ExitForSingleStep != 0) {
- /* Check coherency */
+ /*
+ * Check if not already set
+ */
+ if ((ctx->eflags & EFLAGS_TF) != 0 || ExitForSingleStep != 0) {
+ /*
+ * Check coherency
+ */
assert ((ctx->eflags & EFLAGS_TF) != 0);
assert (ExitForSingleStep != 0);
return 0;
}
- ctx->eflags |= EFLAGS_TF; /* eflags */
+ ctx->eflags |= EFLAGS_TF; /* eflags */
++ExitForSingleStep;
-
+
return 0;
}
- int
-CheckForSingleStep (CPU_Exception_frame* ctx)
+ int
+CheckForSingleStep (CPU_Exception_frame * ctx)
{
- if (ExitForSingleStep) {
- /*
- * This functions can be called both from
- * INT1 and INT3 handlers. In case it is
- * called from INT3, need to clear TF.
- */
- ctx->eflags &= ~EFLAGS_TF;
- ExitForSingleStep = 0;
- return 1;
- }
- return 0;
+ if (ExitForSingleStep) {
+ /*
+ * This functions can be called both from
+ * INT1 and INT3 handlers. In case it is
+ * called from INT3, need to clear TF.
+ */
+ ctx->eflags &= ~EFLAGS_TF;
+ ExitForSingleStep = 0;
+ return 1;
+ }
+ return 0;
}
-void
-CancelSingleStep (CPU_Exception_frame* ctx)
+ void
+CancelSingleStep (CPU_Exception_frame * ctx)
{
- /* Cancel scheduled SS */
- ctx->eflags &= ~EFLAGS_TF;
- ExitForSingleStep-- ;
+ /*
+ * Cancel scheduled SS
+ */
+ ctx->eflags &= ~EFLAGS_TF;
+ ExitForSingleStep--;
}
-cpuExcHandlerType old_currentExcHandler;
-extern void rtems_exception_prologue_50();
+static cpuExcHandlerType old_currentExcHandler;
+extern void rtems_exception_prologue_50 ();
-void connect_rdbg_exception()
+ void
+connect_rdbg_exception ()
{
- interrupt_gate_descriptor *currentIdtEntry;
- unsigned limit;
- unsigned level;
+ interrupt_gate_descriptor *currentIdtEntry;
+ unsigned limit;
+ unsigned level;
/*
* Connect the Exception used to debug
*/
i386_get_info_from_IDTR (&currentIdtEntry, &limit);
-
- _CPU_ISR_Disable(level);
- create_interrupt_gate_descriptor (&currentIdtEntry[50], rtems_exception_prologue_50);
- _CPU_ISR_Enable(level);
- old_currentExcHandler = _currentExcHandler;
- _currentExcHandler = BreakPointExcHdl ;
+ _CPU_ISR_Disable (level);
+ create_interrupt_gate_descriptor (&currentIdtEntry[50],
+ rtems_exception_prologue_50);
+ _CPU_ISR_Enable (level);
+ if (_currentExcHandler != BreakPointExcHdl) {
+ old_currentExcHandler = _currentExcHandler;
+ _currentExcHandler = BreakPointExcHdl;
+ }
+}
+
+ void
+disconnect_rdbg_exception ()
+{
+ if (_currentExcHandler == BreakPointExcHdl) {
+ _currentExcHandler = old_currentExcHandler;
+ }
}
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