syscall.c File Reference

#include <syscall.h>
#include "../syscall-nr.h"

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Macros
#define	syscall0(NUMBER)
	Invokes syscall NUMBER, passing no arguments, and returns the return value as an ‘int’. More...
#define	syscall1(NUMBER, ARG0)
	Invokes syscall NUMBER, passing argument ARG0, and returns the return value as an ‘int’. More...
#define	syscall2(NUMBER, ARG0, ARG1)
	Invokes syscall NUMBER, passing arguments ARG0 and ARG1, and returns the return value as an ‘int’. More...
#define	syscall3(NUMBER, ARG0, ARG1, ARG2)
	Invokes syscall NUMBER, passing arguments ARG0, ARG1, and ARG2, and returns the return value as an ‘int’. More...

Functions
void	halt (void)
	Projects 2 and later. More...
void	exit (int status)
pid_t	exec (const char *file)
int	wait (pid_t pid)
bool	create (const char *file, unsigned initial_size)
bool	remove (const char *file)
int	open (const char *file)
int	filesize (int fd)
int	read (int fd, void *buffer, unsigned size)
int	write (int fd, const void *buffer, unsigned size)
void	seek (int fd, unsigned position)
unsigned	tell (int fd)
void	close (int fd)
mapid_t	mmap (int fd, void *addr)
	Project 3 and optionally project 4. More...
void	munmap (mapid_t mapid)
bool	chdir (const char *dir)
	Project 4 only. More...
bool	mkdir (const char *dir)
bool	readdir (int fd, char name[READDIR_MAX_LEN+1])
bool	isdir (int fd)
int	inumber (int fd)
	lib/user/syscall.h More...

Macro Definition Documentation

syscall0

#define syscall0

(

NUMBER

)

Value:

({                                                      \
          int retval;                                           \
          asm volatile                                          \
            ("pushl %[number]; int $0x30; addl $4, %%esp"       \
               : "=a" (retval)                                  \
               : [number] "i" (NUMBER)                          \
               : "memory");                                     \
          retval;                                               \
        })

Invokes syscall NUMBER, passing no arguments, and returns the return value as an ‘int’.

Definition at line 6 of file syscall.c.

syscall1

#define syscall1	(		NUMBER,
			ARG0
	)

Value:

({                                                               \
          int retval;                                                    \
          asm volatile                                                   \
            ("pushl %[arg0]; pushl %[number]; int $0x30; addl $8, %%esp" \
               : "=a" (retval)                                           \
               : [number] "i" (NUMBER),                                  \
                 [arg0] "g" (ARG0)                                       \
               : "memory");                                              \
          retval;                                                        \
        })

Invokes syscall NUMBER, passing argument ARG0, and returns the return value as an ‘int’.

Definition at line 19 of file syscall.c.

syscall2

#define syscall2	(		NUMBER,
			ARG0,
			ARG1
	)

Value:

({                                                      \
          int retval;                                           \
          asm volatile                                          \
            ("pushl %[arg1]; pushl %[arg0]; "                   \
             "pushl %[number]; int $0x30; addl $12, %%esp"      \
               : "=a" (retval)                                  \
               : [number] "i" (NUMBER),                         \
                 [arg0] "r" (ARG0),                             \
                 [arg1] "r" (ARG1)                              \
               : "memory");                                     \
          retval;                                               \
        })

Invokes syscall NUMBER, passing arguments ARG0 and ARG1, and returns the return value as an ‘int’.

Definition at line 33 of file syscall.c.

syscall3

#define syscall3	(		NUMBER,
			ARG0,
			ARG1,
			ARG2
	)

Value:

({                                                      \
          int retval;                                           \
          asm volatile                                          \
            ("pushl %[arg2]; pushl %[arg1]; pushl %[arg0]; "    \
             "pushl %[number]; int $0x30; addl $16, %%esp"      \
               : "=a" (retval)                                  \
               : [number] "i" (NUMBER),                         \
                 [arg0] "r" (ARG0),                             \
                 [arg1] "r" (ARG1),                             \
                 [arg2] "r" (ARG2)                              \
               : "memory");                                     \
          retval;                                               \
        })

Invokes syscall NUMBER, passing arguments ARG0, ARG1, and ARG2, and returns the return value as an ‘int’.

Definition at line 49 of file syscall.c.

Function Documentation

chdir()

bool chdir

(

const char *

dir

)

Project 4 only.

Definition at line 157 of file syscall.c.

References SYS_CHDIR, and syscall1.

Referenced by main(), and test_main().

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close()

void close

(

int

fd

)

Definition at line 139 of file syscall.c.

References SYS_CLOSE, and syscall1.

Referenced by archive_file(), check_file(), get_inumber(), getcwd(), handle_error(), list_dir(), main(), make_tar_archive(), make_tree(), seq_test(), sort_chunks(), test_main(), and try_write().

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create()

bool create	(	const char *	file,
		unsigned	initial_size
	)

Definition at line 91 of file syscall.c.

References SYS_CREATE, and syscall2.

Referenced by do_touch(), lookup_page(), main(), make_tar_archive(), seq_test(), sort_chunks(), and test_main().

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exec()

pid_t exec

(

const char *

file

)

Definition at line 79 of file syscall.c.

References SYS_EXEC, and syscall1.

Referenced by exec_children(), main(), sort_chunks(), spawn_child(), and test_main().

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exit()

void exit

(

int

status

)

Definition at line 72 of file syscall.c.

References NOT_REACHED, SYS_EXIT, and syscall1.

Referenced by _start(), consume_some_resources_and_die(), debug_panic(), fail(), fail_io(), main(), relay(), test_main(), and usage().

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filesize()

int filesize

(

int

fd

)

Definition at line 109 of file syscall.c.

References SYS_FILESIZE, and syscall1.

Referenced by archive_ordinary_file(), check_file_handle(), check_file_size(), list_dir(), and main().

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halt()

void halt

(

void

)

Projects 2 and later.

Definition at line 65 of file syscall.c.

References NOT_REACHED, SYS_HALT, and syscall0.

Referenced by main(), and test_main().

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inumber()

int inumber

(

int

fd

)

lib/user/syscall.h

Definition at line 181 of file syscall.c.

References SYS_INUMBER, and syscall1.

Referenced by archive_file(), get_inumber(), getcwd(), list_dir(), and test_main().

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isdir()

bool isdir

(

int

fd

)

Definition at line 175 of file syscall.c.

References SYS_ISDIR, and syscall1.

Referenced by archive_file(), and list_dir().

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mkdir()

bool mkdir

(

const char *

dir

)

Definition at line 163 of file syscall.c.

References SYS_MKDIR, and syscall1.

Referenced by do_mkdir(), main(), and test_main().

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mmap()

mapid_t mmap	(	int	fd,
		void *	addr
	)

Project 3 and optionally project 4.

Definition at line 145 of file syscall.c.

References SYS_MMAP, and syscall2.

Referenced by main(), and test_main().

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munmap()

void munmap

(

mapid_t

mapid

)

Definition at line 151 of file syscall.c.

References SYS_MUNMAP, and syscall1.

Referenced by main(), and test_main().

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open()

int open

(

const char *

file

)

Definition at line 103 of file syscall.c.

References SYS_OPEN, and syscall1.

Referenced by archive_file(), check_file(), consume_some_resources(), consume_some_resources_and_die(), get_inumber(), getcwd(), list_dir(), main(), make_tar_archive(), make_tree(), remove_tree(), seq_test(), sort_chunks(), test_main(), try_write(), and wrap_open().

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read()

int read	(	int	fd,
		void *	buffer,
		unsigned	size
	)

Definition at line 115 of file syscall.c.

References buffer, SYS_READ, and syscall3.

Referenced by archive_ordinary_file(), check_file_handle(), main(), read_line(), relay(), sort_chunks(), and test_main().

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readdir()

bool readdir	(	int	fd,
		char	name[READDIR_MAX_LEN+1]
	)

Definition at line 169 of file syscall.c.

References name, SYS_READDIR, and syscall2.

Referenced by archive_directory(), getcwd(), list_dir(), and test_main().

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remove()

bool remove

(

const char *

file

)

Definition at line 97 of file syscall.c.

References SYS_REMOVE, and syscall1.

Referenced by do_remove(), main(), and test_main().

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seek()

void seek	(	int	fd,
		unsigned	position
	)

Definition at line 127 of file syscall.c.

References SYS_SEEK, and syscall2.

Referenced by main(), and test_main().

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tell()

unsigned tell

(

int

fd

)

Definition at line 133 of file syscall.c.

References SYS_TELL, and syscall1.

Referenced by check_tell(), and main().

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wait()

int wait

(

pid_t

pid

)

Definition at line 85 of file syscall.c.

References SYS_WAIT, and syscall1.

write()

int write	(	int	fd,
		const void *	buffer,
		unsigned	size
	)

Definition at line 121 of file syscall.c.

References buffer, SYS_WRITE, and syscall3.

Referenced by do_write(), flush(), main(), page_fault(), putchar(), puts(), relay(), seq_test(), sigchld_handler(), sort_chunks(), test_main(), try_write(), vmsg(), and write_some_bytes().

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