84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/* See COPYRIGHT for copyright information. */
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#include <inc/stdio.h>
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#include <inc/string.h>
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#include <inc/assert.h>
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#include <kern/monitor.h>
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#include <kern/console.h>
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#include <kern/pmap.h>
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#include <kern/kclock.h>
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void
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i386_init(void)
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{
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extern char edata[], end[];
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// Before doing anything else, complete the ELF loading process.
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// Clear the uninitialized global data (BSS) section of our program.
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// This ensures that all static/global variables start out zero.
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memset(edata, 0, end - edata);
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// Initialize the console.
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// Can't call cprintf until after we do this!
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cons_init();
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cprintf("6828 decimal is %o octal!\n", 6828);
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// Lab 2 memory management initialization functions
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mem_init();
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// Drop into the kernel monitor.
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while (1)
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monitor(NULL);
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}
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/*
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* Variable panicstr contains argument to first call to panic; used as flag
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* to indicate that the kernel has already called panic.
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*/
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const char *panicstr;
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/*
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* Panic is called on unresolvable fatal errors.
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* It prints "panic: mesg", and then enters the kernel monitor.
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*/
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void
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_panic(const char *file, int line, const char *fmt,...)
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{
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va_list ap;
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if (panicstr)
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goto dead;
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panicstr = fmt;
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// Be extra sure that the machine is in as reasonable state
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asm volatile("cli; cld");
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va_start(ap, fmt);
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cprintf("kernel panic at %s:%d: ", file, line);
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vcprintf(fmt, ap);
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cprintf("\n");
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va_end(ap);
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dead:
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/* break into the kernel monitor */
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while (1)
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monitor(NULL);
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}
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/* like panic, but don't */
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void
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_warn(const char *file, int line, const char *fmt,...)
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{
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va_list ap;
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va_start(ap, fmt);
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cprintf("kernel warning at %s:%d: ", file, line);
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vcprintf(fmt, ap);
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cprintf("\n");
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va_end(ap);
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}
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