1 files changed, 92 insertions, 0 deletions
diff --git a/roms/openbios/arch/x86/exception.c b/roms/openbios/arch/x86/exception.c
new file mode 100644
index 000000000..fa07242c5
--- /dev/null
+++ b/roms/openbios/arch/x86/exception.c
@@ -0,0 +1,92 @@
+#include "config.h"
+#include "libopenbios/bindings.h"
+#include "asm/types.h"
+
+
+
+/* program counter */
+extern ucell            PC;
+
+extern unsigned char    *dict;
+extern cell             dicthead;
+extern ucell            *last;
+
+
+
+struct eregs {
+	uint32_t eax, ecx, edx, ebx, esp, ebp, esi, edi;
+	uint32_t vector;
+	uint32_t error_code;
+	uint32_t eip;
+	uint32_t cs;
+	uint32_t eflags;
+};
+
+static const char * const exception_names[]= {
+	"division by zero",
+	"single step",
+	"NMI",
+	"breakpoint",
+	"interrupt overflow",
+	"bound range exceeded",
+	"invalid opcode",
+	"device unavailable",
+	"double fault",
+	"FPU segment overrun",
+	"invalid TSS",
+	"segment not present",
+	"stack exception",
+	"general protection fault",
+	"page fault",
+	"reserved",
+	"floating point exception",
+	"alignment check",
+	"machine check exception",
+};
+
+void do_nothing(void);
+void do_nothing(void)
+{
+	printk("Doing nothing\n");
+}
+
+void x86_exception(struct eregs *info);
+void x86_exception(struct eregs *info)
+{
+	if(info->vector <= 18) {
+		printk("\nUnexpected Exception: %s",
+				exception_names[info->vector]);
+	} else {
+		printk("\nUnexpected Exception: %d", info->vector);
+	}
+
+	printk(
+		" @ %02x:%08lx - Halting\n"
+		"Code: %d eflags: %08lx\n"
+		"eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n"
+		"edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n",
+		info->cs, (unsigned long)info->eip,
+		info->error_code, (unsigned long)info->eflags,
+		(unsigned long)info->eax, (unsigned long)info->ebx,
+		(unsigned long)info->ecx, (unsigned long)info->edx,
+		(unsigned long)info->edi, (unsigned long)info->esi,
+		(unsigned long)info->ebp, (unsigned long)info->esp);
+
+        printk("\ndict=0x%x here=0x%x(dict+0x%x) pc=0x%x(dict+0x%x)\n",
+               (ucell)dict, (ucell)dict + dicthead, dicthead, PC, PC - (ucell) dict);
+        printk("dstackcnt=%d rstackcnt=%d\n",
+               dstackcnt, rstackcnt);
+
+	rstackcnt=0;
+	dstackcnt=0;
+
+	PC=findword("outer-interpreter");
+
+	info->eip=(uint32_t)&do_nothing;
+
+/*
+	for (;;)
+		asm("hlt;");
+		;
+*/
+}