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Macros
#define	PF_P 0x1
	Page fault error code bits that describe the cause of the exception. More...

#define	PF_W 0x2
	0: read, 1: write. More...

#define	PF_U 0x4
	0: kernel, 1: user process. More...

Functions
void	exception_init (void)
	Registers handlers for interrupts that can be caused by user programs. More...

void	exception_print_stats (void)
	userprog/exception.h More...

Macro Definition Documentation

◆ PF_P

#define PF_P 0x1

Page fault error code bits that describe the cause of the exception.

0: not-present page. 1: access rights violation.

Definition at line 5 of file exception.h.

◆ PF_U

#define PF_U 0x4

0: kernel, 1: user process.

Definition at line 7 of file exception.h.

◆ PF_W

#define PF_W 0x2

0: read, 1: write.

Definition at line 6 of file exception.h.

Function Documentation

◆ exception_init()

void exception_init ( void )

Registers handlers for interrupts that can be caused by user programs.

In a real Unix-like OS, most of these interrupts would be passed along to the user process in the form of signals, as described in [SV-386] 3-24 and 3-25, but we don't implement signals. Instead, we'll make them simply kill the user process.

Page faults are an exception. Here they are treated the same way as other exceptions, but this will need to change to implement virtual memory.

Refer to [IA32-v3a] section 5.15 "Exception and Interrupt Reference" for a description of each of these exceptions.

Definition at line 30 of file exception.c.

References INTR_OFF, INTR_ON, intr_register_int(), kill(), and page_fault().

Referenced by pintos_init().

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