initial commit of lk (little kernel) project
diff --git a/arch/arm/faults.c b/arch/arm/faults.c
new file mode 100644
index 0000000..c16aff0
--- /dev/null
+++ b/arch/arm/faults.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <debug.h>
+#include <arch/arm.h>
+#include <kernel/thread.h>
+
+static void dump_fault_frame(struct arm_fault_frame *frame)
+{
+ dprintf("r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n", frame->r[0], frame->r[1], frame->r[2], frame->r[3]);
+ dprintf("r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n", frame->r[4], frame->r[5], frame->r[6], frame->r[7]);
+ dprintf("r8 0x%08x r9 0x%08x r10 0x%08x r11 0x%08x\n", frame->r[8], frame->r[9], frame->r[10], frame->r[11]);
+ dprintf("r12 0x%08x usp 0x%08x ulr 0x%08x pc 0x%08x\n", frame->r[12], frame->usp, frame->ulr, frame->pc);
+ dprintf("spsr 0x%08x\n", frame->spsr);
+
+ struct arm_mode_regs regs;
+ arm_save_mode_regs(®s);
+
+ dprintf("%c%s r13 0x%08x r14 0x%08x\n", ((frame->spsr & MODE_MASK) == MODE_FIQ) ? '*' : ' ', "fiq", regs.fiq_r13, regs.fiq_r14);
+ dprintf("%c%s r13 0x%08x r14 0x%08x\n", ((frame->spsr & MODE_MASK) == MODE_IRQ) ? '*' : ' ', "irq", regs.irq_r13, regs.irq_r14);
+ dprintf("%c%s r13 0x%08x r14 0x%08x\n", ((frame->spsr & MODE_MASK) == MODE_SVC) ? '*' : ' ', "svc", regs.svc_r13, regs.svc_r14);
+ dprintf("%c%s r13 0x%08x r14 0x%08x\n", ((frame->spsr & MODE_MASK) == MODE_UND) ? '*' : ' ', "und", regs.und_r13, regs.und_r14);
+ dprintf("%c%s r13 0x%08x r14 0x%08x\n", ((frame->spsr & MODE_MASK) == MODE_SYS) ? '*' : ' ', "sys", regs.sys_r13, regs.sys_r14);
+}
+
+static void exception_die(struct arm_fault_frame *frame, int pc_off, const char *msg)
+{
+ inc_critical_section();
+ frame->pc += pc_off;
+ dump_fault_frame(frame);
+ dprintf(msg);
+ debug_halt();
+ for(;;);
+}
+
+void arm_syscall_handler(struct arm_fault_frame *frame)
+{
+ exception_die(frame, -4, "unhandled syscall, halting\n");
+}
+
+void arm_undefined_handler(struct arm_fault_frame *frame)
+{
+ exception_die(frame, -4, "undefined abort, halting\n");
+}
+
+void arm_data_abort_handler(struct arm_fault_frame *frame)
+{
+ exception_die(frame, -8, "data abort, halting\n");
+}
+
+void arm_prefetch_abort_handler(struct arm_fault_frame *frame)
+{
+ exception_die(frame, -4, "prefetch abort, halting\n");
+}