diff options
Diffstat (limited to 'c/src/librdbg/src/powerpc/excep_f.c')
| -rw-r--r-- | c/src/librdbg/src/powerpc/excep_f.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/c/src/librdbg/src/powerpc/excep_f.c b/c/src/librdbg/src/powerpc/excep_f.c index 8580789b99..13adcd1e67 100644 --- a/c/src/librdbg/src/powerpc/excep_f.c +++ b/c/src/librdbg/src/powerpc/excep_f.c @@ -56,6 +56,18 @@ BreakPointExcHdl(CPU_Exception_frame *ctx) rtems_status_code status; 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) ) { PushSavedExceptCtx (_Thread_Executing->Object.id, ctx); justSaveContext = 0; @@ -114,7 +126,7 @@ BreakPointExcHdl(CPU_Exception_frame *ctx) printk("\t CTR = %x\n", ctx->EXC_CTR); printk("\t XER = %x\n", ctx->EXC_XER); 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 status = rtems_semaphore_create (rtems_build_name('D', 'B', 'G', 'c'), @@ -151,6 +163,11 @@ BreakPointExcHdl(CPU_Exception_frame *ctx) default: DPRINTF((" OTHER EXCEPTION !!!\n")); +#ifdef DDEBUG + { extern void BSP_printStackTrace(); + BSP_printStackTrace(ctx); + } +#endif rtems_semaphore_release( wakeupEventSemId ); break; } |