summaryrefslogtreecommitdiffstats
path: root/c/src/exec/score/cpu
diff options
context:
space:
mode:
authorJoel Sherrill <joel.sherrill@OARcorp.com>1998-08-21 16:39:52 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>1998-08-21 16:39:52 +0000
commiteb562f2c860061868e4ea1a821a84147b694dd07 (patch)
tree4273d9ac092dab0e00e065a365595a2b30fcc95f /c/src/exec/score/cpu
parentSpacing changes (diff)
downloadrtems-eb562f2c860061868e4ea1a821a84147b694dd07.tar.bz2
Patch from Eric Valette <valette@crf.canon.fr>:
Here is a patch that enables to catch exception and get message before crashing RTEMS :) It should be generic to any Intel port although enabled only for pc386 BSP... [Joel] I fixed the bug I introduced in irq_asm.s...
Diffstat (limited to 'c/src/exec/score/cpu')
-rw-r--r--c/src/exec/score/cpu/i386/cpu.c90
-rw-r--r--c/src/exec/score/cpu/i386/cpu.h27
-rw-r--r--c/src/exec/score/cpu/i386/cpu_asm.s99
3 files changed, 216 insertions, 0 deletions
diff --git a/c/src/exec/score/cpu/i386/cpu.c b/c/src/exec/score/cpu/i386/cpu.c
index 70d7fd3267..1f0900fceb 100644
--- a/c/src/exec/score/cpu/i386/cpu.c
+++ b/c/src/exec/score/cpu/i386/cpu.c
@@ -15,6 +15,9 @@
#include <rtems/system.h>
#include <rtems/score/isr.h>
+#include <bspIo.h>
+#include <rtems/score/thread.h>
+
/* _CPU_Initialize
*
@@ -82,3 +85,90 @@ void _CPU_Thread_Idle_body ()
asm volatile ("hlt");
}
}
+
+void _defaultExcHandler (CPU_Exception_frame *ctx)
+{
+ 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");
+ printk(" ************ FAULTY THREAD WILL BE DELETED **************\n");
+ /*
+ * OK I could probably use a simplified version but at least this
+ * should work.
+ */
+ rtems_task_delete(_Thread_Executing->Object.id);
+}
+
+cpuExcHandlerType _currentExcHandler = _defaultExcHandler;
+
+extern void rtems_exception_prologue_0();
+extern void rtems_exception_prologue_1();
+extern void rtems_exception_prologue_2();
+extern void rtems_exception_prologue_3();
+extern void rtems_exception_prologue_4();
+extern void rtems_exception_prologue_5();
+extern void rtems_exception_prologue_6();
+extern void rtems_exception_prologue_7();
+extern void rtems_exception_prologue_8();
+extern void rtems_exception_prologue_9();
+extern void rtems_exception_prologue_10();
+extern void rtems_exception_prologue_11();
+extern void rtems_exception_prologue_12();
+extern void rtems_exception_prologue_13();
+extern void rtems_exception_prologue_14();
+extern void rtems_exception_prologue_16();
+extern void rtems_exception_prologue_17();
+extern void rtems_exception_prologue_18();
+
+static rtems_raw_irq_hdl tbl[] = {
+ rtems_exception_prologue_0,
+ rtems_exception_prologue_1,
+ rtems_exception_prologue_2,
+ rtems_exception_prologue_3,
+ rtems_exception_prologue_4,
+ rtems_exception_prologue_5,
+ rtems_exception_prologue_6,
+ rtems_exception_prologue_7,
+ rtems_exception_prologue_8,
+ rtems_exception_prologue_9,
+ rtems_exception_prologue_10,
+ rtems_exception_prologue_11,
+ rtems_exception_prologue_12,
+ rtems_exception_prologue_13,
+ rtems_exception_prologue_14,
+ rtems_exception_prologue_16,
+ rtems_exception_prologue_17,
+ rtems_exception_prologue_18,
+};
+
+void rtems_exception_init_mngt()
+{
+ unsigned int i,j;
+ interrupt_gate_descriptor *currentIdtEntry;
+ unsigned limit;
+ unsigned level;
+
+ i = sizeof(tbl) / sizeof (rtems_raw_irq_hdl);
+
+ i386_get_info_from_IDTR (&currentIdtEntry, &limit);
+
+ _CPU_ISR_Disable(level);
+ for (j = 0; j < i; j++) {
+ create_interrupt_gate_descriptor (&currentIdtEntry[j], tbl[j]);
+ }
+ _CPU_ISR_Enable(level);
+}
+
diff --git a/c/src/exec/score/cpu/i386/cpu.h b/c/src/exec/score/cpu/i386/cpu.h
index d4806a2be4..8620ad8392 100644
--- a/c/src/exec/score/cpu/i386/cpu.h
+++ b/c/src/exec/score/cpu/i386/cpu.h
@@ -138,6 +138,10 @@ typedef struct {
unsigned32 eflags;
} CPU_Exception_frame;
+typedef void (*cpuExcHandlerType) (CPU_Exception_frame*);
+extern cpuExcHandlerType _currentExcHandler;
+extern void rtems_exception_init_mngt();
+
/*
* The following structure defines the set of information saved
* on the current stack by RTEMS upon receipt of each interrupt
@@ -146,6 +150,29 @@ typedef struct {
typedef CPU_Exception_frame CPU_Interrupt_frame;
+typedef enum {
+ DIVIDE_BY_ZERO = 0,
+ DEBUG = 1,
+ NMI = 2,
+ BREAKPOINT = 3,
+ OVERFLOW = 4,
+ BOUND = 5,
+ ILLEGAL_INSTR = 6,
+ MATH_COPROC_UNAVAIL = 7,
+ DOUBLE_FAULT = 8,
+ I386_COPROC_SEG_ERR = 9,
+ INVALID_TSS = 10,
+ SEGMENT_NOT_PRESENT = 11,
+ STACK_SEGMENT_FAULT = 12,
+ GENERAL_PROT_ERR = 13,
+ PAGE_FAULT = 14,
+ INTEL_RES15 = 15,
+ FLOAT_ERROR = 16,
+ ALIGN_CHECK = 17,
+ MACHINE_CHECK = 18
+} Intel_symbolic_exception_name;
+
+
/*
* The following table contains the information required to configure
* the i386 specific parameters.
diff --git a/c/src/exec/score/cpu/i386/cpu_asm.s b/c/src/exec/score/cpu/i386/cpu_asm.s
index a0bd6ece2c..16d0a7c205 100644
--- a/c/src/exec/score/cpu/i386/cpu_asm.s
+++ b/c/src/exec/score/cpu/i386/cpu_asm.s
@@ -109,6 +109,105 @@ SYM (_CPU_Context_restore_fp):
frstor (eax) # restore FP context
ret
+SYM (_Exception_Handler):
+ pusha # Push general purpose registers
+ pushl esp # Push exception frame address
+ movl _currentExcHandler, eax # Call function storead in _currentExcHandler
+ call * eax
+ addl $4, esp
+ popa # restore general purpose registers
+ addl $8, esp # skill vector number and faultCode
+ iret
+
+#define DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY(_vector) \
+ .p2align 4 ; \
+ PUBLIC (rtems_exception_prologue_ ## _vector ) ; \
+SYM (rtems_exception_prologue_ ## _vector ): \
+ pushl $ _vector ; \
+ jmp SYM (_Exception_Handler) ;
+
+#define DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY(_vector) \
+ .p2align 4 ; \
+ PUBLIC (rtems_exception_prologue_ ## _vector ) ; \
+SYM (rtems_exception_prologue_ ## _vector ): \
+ pushl $ 0 ; \
+ pushl $ _vector ; \
+ jmp SYM (_Exception_Handler) ;
+
+/*
+ * Divide Error
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (0)
+/*
+ * Debug Exception
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (1)
+/*
+ * NMI
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (2)
+/*
+ * Breakpoint
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (3)
+/*
+ * Overflow
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (4)
+/*
+ * Bound Range Exceeded
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (5)
+/*
+ * Invalid Opcode
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (6)
+/*
+ * No Math Coproc
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (7)
+/*
+ * Double Fault
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (8)
+/*
+ * Coprocessor segment overrun
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (9)
+/*
+ * Invalid TSS
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (10)
+/*
+ * Segment Not Present
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (11)
+/*
+ * Stack segment Fault
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (12)
+/*
+ * General Protection Fault
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (13)
+/*
+ * Page Fault
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (14)
+/*
+ * Floating point error (NB 15 is reserved it is therefor skipped)
+ */
+DISTINCT_EXCEPTION_WITHOUT_FAULTCODE_ENTRY (16)
+/*
+ * Aligment Check
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (17)
+/*
+ * Machine Check
+ */
+DISTINCT_EXCEPTION_WITH_FAULTCODE_ENTRY (18)
+
+
/*
* GO32 does not require these segment related routines.
*/