17 lines
477 B
C++
17 lines
477 B
C++
#ifndef USERPROG_EXCEPTION_H
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#define USERPROG_EXCEPTION_H
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#include <stdbool.h>
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/* Page fault error code bits that describe the cause of the exception. */
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#define PF_P 0x1 /* 0: not-present page. 1: access rights violation. */
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#define PF_W 0x2 /* 0: read, 1: write. */
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#define PF_U 0x4 /* 0: kernel, 1: user process. */
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void exception_init (void);
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void exception_print_stats (void);
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bool
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try_fetch_page (void *upage, bool write);
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#endif /* userprog/exception.h */
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