Commit cc7a492a authored by Willy Tarreau's avatar Willy Tarreau Committed by Paul E. McKenney
Browse files

tools/nolibc/types: split syscall-specific definitions into their own files 



The macros and type definitions used by a number of syscalls were moved
to types.h where they will be easier to maintain. A few of them
are arch-specific and must not be moved there (e.g. O_*, sys_stat_struct).
A warning about them was placed at the top of the file.

Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 967cce19

tools/include/nolibc/nolibc.h

+2 −108
Original line number Diff line number Diff line
@@ -94,7 +94,9 @@ 
#include <linux/fs.h>

#include <linux/loop.h>

#include <linux/time.h>

#include "types.h"



/* Used by programs to avoid std includes */

#define NOLIBC



/* this way it will be removed if unused */
@@ -111,114 +113,6 @@ static int errno; 
 */

#define MAX_ERRNO 4095



/* for poll() */

struct pollfd {

	int fd;

	short int events;

	short int revents;

};



/* for getdents64() */

struct linux_dirent64 {

	uint64_t       d_ino;

	int64_t        d_off;

	unsigned short d_reclen;

	unsigned char  d_type;

	char           d_name[];

};



/* commonly an fd_set represents 256 FDs */

#define FD_SETSIZE 256

typedef struct { uint32_t fd32[FD_SETSIZE/32]; } fd_set;



/* needed by wait4() */

struct rusage {

	struct timeval ru_utime;

	struct timeval ru_stime;

	long   ru_maxrss;

	long   ru_ixrss;

	long   ru_idrss;

	long   ru_isrss;

	long   ru_minflt;

	long   ru_majflt;

	long   ru_nswap;

	long   ru_inblock;

	long   ru_oublock;

	long   ru_msgsnd;

	long   ru_msgrcv;

	long   ru_nsignals;

	long   ru_nvcsw;

	long   ru_nivcsw;

};



/* stat flags (WARNING, octal here) */

#define S_IFDIR       0040000

#define S_IFCHR       0020000

#define S_IFBLK       0060000

#define S_IFREG       0100000

#define S_IFIFO       0010000

#define S_IFLNK       0120000

#define S_IFSOCK      0140000

#define S_IFMT        0170000



#define S_ISDIR(mode)  (((mode) & S_IFDIR) == S_IFDIR)

#define S_ISCHR(mode)  (((mode) & S_IFCHR) == S_IFCHR)

#define S_ISBLK(mode)  (((mode) & S_IFBLK) == S_IFBLK)

#define S_ISREG(mode)  (((mode) & S_IFREG) == S_IFREG)

#define S_ISFIFO(mode) (((mode) & S_IFIFO) == S_IFIFO)

#define S_ISLNK(mode)  (((mode) & S_IFLNK) == S_IFLNK)

#define S_ISSOCK(mode) (((mode) & S_IFSOCK) == S_IFSOCK)



#define DT_UNKNOWN 0

#define DT_FIFO    1

#define DT_CHR     2

#define DT_DIR     4

#define DT_BLK     6

#define DT_REG     8

#define DT_LNK    10

#define DT_SOCK   12



/* all the *at functions */

#ifndef AT_FDCWD

#define AT_FDCWD             -100

#endif



/* lseek */

#define SEEK_SET        0

#define SEEK_CUR        1

#define SEEK_END        2



/* reboot */

#define LINUX_REBOOT_MAGIC1         0xfee1dead

#define LINUX_REBOOT_MAGIC2         0x28121969

#define LINUX_REBOOT_CMD_HALT       0xcdef0123

#define LINUX_REBOOT_CMD_POWER_OFF  0x4321fedc

#define LINUX_REBOOT_CMD_RESTART    0x01234567

#define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2





/* The format of the struct as returned by the libc to the application, which

 * significantly differs from the format returned by the stat() syscall flavours.

 */

struct stat {

	dev_t     st_dev;     /* ID of device containing file */

	ino_t     st_ino;     /* inode number */

	mode_t    st_mode;    /* protection */

	nlink_t   st_nlink;   /* number of hard links */

	uid_t     st_uid;     /* user ID of owner */

	gid_t     st_gid;     /* group ID of owner */

	dev_t     st_rdev;    /* device ID (if special file) */

	off_t     st_size;    /* total size, in bytes */

	blksize_t st_blksize; /* blocksize for file system I/O */

	blkcnt_t  st_blocks;  /* number of 512B blocks allocated */

	time_t    st_atime;   /* time of last access */

	time_t    st_mtime;   /* time of last modification */

	time_t    st_ctime;   /* time of last status change */

};



#define WEXITSTATUS(status)   (((status) & 0xff00) >> 8)

#define WIFEXITED(status)     (((status) & 0x7f) == 0)



/* Below comes the architecture-specific code. For each architecture, we have

 * the syscall declarations and the _start code definition. This is the only

 * global part. On all architectures the kernel puts everything in the stack

tools/include/nolibc/types.h

0 → 100644
+133 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */

/*

 * Special types used by various syscalls for NOLIBC

 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>

 */



#ifndef _NOLIBC_TYPES_H

#define _NOLIBC_TYPES_H



#include "std.h"

#include <linux/time.h>





/* Only the generic macros and types may be defined here. The arch-specific

 * ones such as the O_RDONLY and related macros used by fcntl() and open(), or

 * the layout of sys_stat_struct must not be defined here.

 */



/* stat flags (WARNING, octal here) */

#define S_IFDIR        0040000

#define S_IFCHR        0020000

#define S_IFBLK        0060000

#define S_IFREG        0100000

#define S_IFIFO        0010000

#define S_IFLNK        0120000

#define S_IFSOCK       0140000

#define S_IFMT         0170000



#define S_ISDIR(mode)  (((mode) & S_IFDIR)  == S_IFDIR)

#define S_ISCHR(mode)  (((mode) & S_IFCHR)  == S_IFCHR)

#define S_ISBLK(mode)  (((mode) & S_IFBLK)  == S_IFBLK)

#define S_ISREG(mode)  (((mode) & S_IFREG)  == S_IFREG)

#define S_ISFIFO(mode) (((mode) & S_IFIFO)  == S_IFIFO)

#define S_ISLNK(mode)  (((mode) & S_IFLNK)  == S_IFLNK)

#define S_ISSOCK(mode) (((mode) & S_IFSOCK) == S_IFSOCK)



/* dirent types */

#define DT_UNKNOWN     0x0

#define DT_FIFO        0x1

#define DT_CHR         0x2

#define DT_DIR         0x4

#define DT_BLK         0x6

#define DT_REG         0x8

#define DT_LNK         0xa

#define DT_SOCK        0xc



/* commonly an fd_set represents 256 FDs */

#define FD_SETSIZE     256



/* Special FD used by all the *at functions */

#ifndef AT_FDCWD

#define AT_FDCWD       (-100)

#endif



/* whence values for lseek() */

#define SEEK_SET       0

#define SEEK_CUR       1

#define SEEK_END       2



/* cmd for reboot() */

#define LINUX_REBOOT_MAGIC1         0xfee1dead

#define LINUX_REBOOT_MAGIC2         0x28121969

#define LINUX_REBOOT_CMD_HALT       0xcdef0123

#define LINUX_REBOOT_CMD_POWER_OFF  0x4321fedc

#define LINUX_REBOOT_CMD_RESTART    0x01234567

#define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2



/* Macros used on waitpid()'s return status */

#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)

#define WIFEXITED(status)   (((status) & 0x7f) == 0)





/* for select() */

typedef struct {

	uint32_t fd32[FD_SETSIZE / 32];

} fd_set;



/* for poll() */

struct pollfd {

	int fd;

	short int events;

	short int revents;

};



/* for getdents64() */

struct linux_dirent64 {

	uint64_t       d_ino;

	int64_t        d_off;

	unsigned short d_reclen;

	unsigned char  d_type;

	char           d_name[];

};



/* needed by wait4() */

struct rusage {

	struct timeval ru_utime;

	struct timeval ru_stime;

	long   ru_maxrss;

	long   ru_ixrss;

	long   ru_idrss;

	long   ru_isrss;

	long   ru_minflt;

	long   ru_majflt;

	long   ru_nswap;

	long   ru_inblock;

	long   ru_oublock;

	long   ru_msgsnd;

	long   ru_msgrcv;

	long   ru_nsignals;

	long   ru_nvcsw;

	long   ru_nivcsw;

};



/* The format of the struct as returned by the libc to the application, which

 * significantly differs from the format returned by the stat() syscall flavours.

 */

struct stat {

	dev_t     st_dev;     /* ID of device containing file */

	ino_t     st_ino;     /* inode number */

	mode_t    st_mode;    /* protection */

	nlink_t   st_nlink;   /* number of hard links */

	uid_t     st_uid;     /* user ID of owner */

	gid_t     st_gid;     /* group ID of owner */

	dev_t     st_rdev;    /* device ID (if special file) */

	off_t     st_size;    /* total size, in bytes */

	blksize_t st_blksize; /* blocksize for file system I/O */

	blkcnt_t  st_blocks;  /* number of 512B blocks allocated */

	time_t    st_atime;   /* time of last access */

	time_t    st_mtime;   /* time of last modification */

	time_t    st_ctime;   /* time of last status change */

};



#endif /* _NOLIBC_TYPES_H */