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Message-Id: <20220207162354.14293-5-w@1wt.eu>
Date: Mon, 7 Feb 2022 17:23:16 +0100
From: Willy Tarreau <w@....eu>
To: "Paul E . McKenney" <paulmck@...nel.org>
Cc: Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
Willy Tarreau <w@....eu>
Subject: [PATCH 04/42] 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: Willy Tarreau <w@....eu>
---
tools/include/nolibc/nolibc.h | 110 +---------------------------
tools/include/nolibc/types.h | 133 ++++++++++++++++++++++++++++++++++
2 files changed, 135 insertions(+), 108 deletions(-)
create mode 100644 tools/include/nolibc/types.h
diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index 186a78c25326..3719959e6f57 100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -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
diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
new file mode 100644
index 000000000000..2f09abaf95f1
--- /dev/null
+++ b/tools/include/nolibc/types.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Special types used by various syscalls for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@....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 */
--
2.35.1
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