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2002-01-18 Till Straumann <strauman@slac.stanford.edu>

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* src/powerpc/excep_f.c: This patch addresses the following issues:
	    - exception handler needs to enable MSR_FP if the interrupted
	      thread is FP enabled.
	    - printk message for MSR fixed and added stacktrace

   	NOTE: this requires the stacktrace patch to
	lib/libbsp/powerpc/shared/vectors/vector_init.c
	(#ifdef DDEBUG only, however)
This commit is contained in:
Joel Sherrill
2002-01-18 14:14:17 +00:00
parent 4e91814ba7
commit b077dc41ce
2 changed files with 29 additions and 1 deletions
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11
c/src/librdbg/ChangeLog
View File

@@ -1,3 +1,14 @@
2002-01-18 Till Straumann <strauman@slac.stanford.edu>
* src/powerpc/excep_f.c: This patch addresses the following issues:
- exception handler needs to enable MSR_FP if the interrupted
thread is FP enabled.
- printk message for MSR fixed and added stacktrace
NOTE: this requires the stacktrace patch to
lib/libbsp/powerpc/shared/vectors/vector_init.c
(#ifdef DDEBUG only, however)
2001-01-18 Joel Sherrill <joel@OARcorp.com> 2001-01-18 Joel Sherrill <joel@OARcorp.com>
* src/powerpc/new_exception_processing/remdeb_svc.c: Corrected * src/powerpc/new_exception_processing/remdeb_svc.c: Corrected

19
c/src/librdbg/src/powerpc/excep_f.c
View File

@@ -56,6 +56,18 @@ BreakPointExcHdl(CPU_Exception_frame *ctx)
rtems_status_code status; rtems_status_code status;
rtems_id continueSemId; rtems_id continueSemId;
/* T. Straumann, 1/16/2002: we must re-enable the floating point engine
* if the interrupted thread is FP. Otherwise,
* the semaphore primitives may crash when they
* try to save FP context while switching this
* thread...
*/
if (ctx->EXC_SRR1 & 0x2000) {
register unsigned long msr;
__asm__ __volatile__("mfmsr %0":"=r"(msr));
__asm__ __volatile__("mtmsr %0"::"r"(msr|MSR_FP));
}
if ( (justSaveContext) && (ctx->_EXC_number == ASM_SYS_VECTOR) ) { if ( (justSaveContext) && (ctx->_EXC_number == ASM_SYS_VECTOR) ) {
PushSavedExceptCtx (_Thread_Executing->Object.id, ctx); PushSavedExceptCtx (_Thread_Executing->Object.id, ctx);
justSaveContext = 0; justSaveContext = 0;
@@ -114,7 +126,7 @@ BreakPointExcHdl(CPU_Exception_frame *ctx)
printk("\t CTR = %x\n", ctx->EXC_CTR); printk("\t CTR = %x\n", ctx->EXC_CTR);
printk("\t XER = %x\n", ctx->EXC_XER); printk("\t XER = %x\n", ctx->EXC_XER);
printk("\t LR = %x\n", ctx->EXC_LR); printk("\t LR = %x\n", ctx->EXC_LR);
printk("\t MSR = %x\n", ctx->EXC_MSR); printk("\t MSR = %x\n", ctx->EXC_SRR1);
#endif #endif
status = rtems_semaphore_create (rtems_build_name('D', 'B', 'G', 'c'), status = rtems_semaphore_create (rtems_build_name('D', 'B', 'G', 'c'),
@@ -151,6 +163,11 @@ BreakPointExcHdl(CPU_Exception_frame *ctx)
default: default:
DPRINTF((" OTHER EXCEPTION !!!\n")); DPRINTF((" OTHER EXCEPTION !!!\n"));
#ifdef DDEBUG
{ extern void BSP_printStackTrace();
BSP_printStackTrace(ctx);
}
#endif
rtems_semaphore_release( wakeupEventSemId ); rtems_semaphore_release( wakeupEventSemId );
break; break;
} }