rm klib because of unimplemented instructions
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@ -1,4 +1,3 @@
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NAME = am
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SRCS = $(shell find -L ./arch/$(ARCH)/src/ -name "*.c" -o -name "*.cpp" -o -name "*.S")
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LIBS += klib
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include $(AM_HOME)/Makefile.lib
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@ -1,7 +1,9 @@
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#include <am.h>
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#include <klib.h>
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void printstr(char *str) {
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while(*str ++) _putc(*str);
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}
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uint get_cause() {
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uint ret;
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@ -17,15 +19,21 @@ uint get_epc() {
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void exception_handle() {
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uint cause = get_cause();
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uint epc = get_epc();
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//uint epc = get_epc();
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uint exccode = (cause >> 2) & 0x1f;
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switch(exccode) {
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/* printf verison
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case 4: printf("BadVAddr when loading @PC = 0x%d.\n", epc); break;
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case 5: printf("BadVAddr when storing @PC = 0x%d.\n", epc); break;
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case 10: printf("Invalid OPCODE @PC = 0x%d.\n", epc); break;
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default: printf("Unhandled exception, ExcCode = %d.\n", exccode);
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*/
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case 4: printstr("BadVAddr when loading.\n"); break;
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case 5: printstr("BadVAddr when storing.\n"); break;
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case 10: printstr("Invalid OPCODE.\n"); break;
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default: printstr("Unhandled exception.\n");
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}
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_halt(1);
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