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227 lines
7.0 KiB
C
227 lines
7.0 KiB
C
/*-
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* Copyright (C) 2014 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _HOST_SYSCALL_H
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#define _HOST_SYSCALL_H
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#include <stand.h>
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#include <assert.h>
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long host_syscall(int number, ...);
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/*
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* Sizes taken from musl's include/alltypes.h.in and expanded for LP64 hosts
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*/
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typedef uint64_t host_dev_t;
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typedef uint64_t host_ino_t;
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typedef unsigned int host_mode_t;
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typedef unsigned int host_uid_t;
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typedef unsigned int host_gid_t;
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typedef int64_t host_off_t;
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typedef long host_blksize_t;
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typedef int64_t host_blkcnt_t;
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#include "stat_arch.h"
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/*
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* stat flags
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* These are arch independent and match the values in nolib and uapi headers
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* with HOST_ prepended.
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*/
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#define HOST_S_IFMT 0170000
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#define HOST_S_IFIFO 0010000
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#define HOST_S_IFCHR 0020000
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#define HOST_S_IFDIR 0040000
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#define HOST_S_IFBLK 0060000
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#define HOST_S_IFREG 0100000
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#define HOST_S_IFLNK 0120000
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#define HOST_S_IFSOCK 0140000
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#define HOST_S_ISBLK(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFBLK)
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#define HOST_S_ISCHR(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFCHR)
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#define HOST_S_ISDIR(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFDIR)
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#define HOST_S_ISFIFO(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFIFO)
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#define HOST_S_ISLNK(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFLNK)
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#define HOST_S_ISREG(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFREG)
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#define HOST_S_ISSOCK(mode) (((mode) & HOST_S_IFMT) == HOST_S_IFSOCK)
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/*
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* Constants for open, fcntl, etc
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*
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* Note: Some of these are arch dependent on Linux, but are the same for
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* powerpc, x86, arm*, and riscv. We should be futureproof, though, since these
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* are the 'generic' values and only older architectures (no longer supported by
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* FreeBSD) vary.
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*
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* These are from tools/include/uapi/asm-generic/fcntl.h and use the octal
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* notation. Beware, hex is used in other places creating potential confsion.
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*/
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#define HOST_O_RDONLY 0
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#define HOST_O_WRONLY 1
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#define HOST_O_RDWR 2
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#define HOST_O_CREAT 00100
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#define HOST_O_EXCL 00200
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#define HOST_O_NOCTTY 00400
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#define HOST_O_TRUNC 01000
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#define HOST_O_APPEND 02000
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#define HOST_O_NONBLOCK 04000
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#define HOST_AT_FDCWD -100 /* Relative to current directory */
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/*
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* Data types
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*/
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struct old_utsname {
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char sysname[65];
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char nodename[65];
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char release[65];
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char version[65];
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char machine[65];
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};
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struct host_timeval {
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time_t tv_sec;
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long tv_usec;
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};
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/*
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* Must match Linux's values see linux/tools/include/uapi/asm-generic/mman-common.h
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* and linux/tools/include/linux/mman.h
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*
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* And pre-pend HOST_ here.
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*/
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#define HOST_PROT_READ 0x1
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#define HOST_PROT_WRITE 0x2
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#define HOST_PROT_EXEC 0x4
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#define HOST_MAP_SHARED 0x01
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#define HOST_MAP_PRIVATE 0x02
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#define HOST_MAP_FIXED 0x10
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#define HOST_MAP_ANONYMOUS 0x20
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#define HOST_MAP_FAILED ((void *)-1)
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/* Mount flags from uapi */
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#define MS_RELATIME (1 << 21)
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#define HOST_REBOOT_MAGIC1 0xfee1dead
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#define HOST_REBOOT_MAGIC2 672274793
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#define HOST_REBOOT_CMD_KEXEC 0x45584543
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/*
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* Values from linux/tools/include/uapi/linux/kexec.h
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*/
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/*
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* Values match ELF architecture types.
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*/
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#define HOST_KEXEC_ARCH_X86_64 (62 << 16)
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#define HOST_KEXEC_ARCH_PPC64 (21 << 16)
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#define HOST_KEXEC_ARCH_ARM (40 << 16)
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#define HOST_KEXEC_ARCH_AARCH64 (183 << 16)
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#define HOST_KEXEC_ARCH_RISCV (243 << 16)
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/* Arbitrary cap on segments */
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#define HOST_KEXEC_SEGMENT_MAX 16
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struct host_kexec_segment {
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void *buf;
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int bufsz;
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void *mem;
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int memsz;
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};
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struct host_dirent64 {
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uint64_t d_ino; /* 64-bit inode number */
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int64_t d_off; /* 64-bit offset to next structure */
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unsigned short d_reclen; /* Size of this dirent */
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unsigned char d_type; /* File type */
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char d_name[]; /* Filename (null-terminated) */
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};
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/* d_type values */
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#define HOST_DT_UNKNOWN 0
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#define HOST_DT_FIFO 1
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#define HOST_DT_CHR 2
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#define HOST_DT_DIR 4
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#define HOST_DT_BLK 6
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#define HOST_DT_REG 8
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#define HOST_DT_LNK 10
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#define HOST_DT_SOCK 12
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#define HOST_DT_WHT 14
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/*
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* System Calls
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*/
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int host_close(int fd);
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int host_dup(int fd);
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int host_exit(int code);
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int host_fstat(int fd, struct host_kstat *sb);
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int host_getdents64(int fd, void *dirp, int count);
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int host_getpid(void);
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int host_gettimeofday(struct host_timeval *a, void *b);
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int host_ioctl(int fd, unsigned long request, unsigned long arg);
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int host_kexec_load(unsigned long entry, unsigned long nsegs, struct host_kexec_segment *segs, unsigned long flags);
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ssize_t host_llseek(int fd, int32_t offset_high, int32_t offset_lo, uint64_t *result, int whence);
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int host_mkdir(const char *, host_mode_t);
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void *host_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off);
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int host_mount(const char *src, const char *target, const char *type,
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unsigned long flags, void *data);
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int host_munmap(void *addr, size_t len);
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int host_open(const char *path, int flags, int mode);
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ssize_t host_read(int fd, void *buf, size_t nbyte);
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int host_reboot(int, int, int, uintptr_t);
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int host_select(int nfds, long *readfds, long *writefds, long *exceptfds,
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struct host_timeval *timeout);
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int host_stat(const char *path, struct host_kstat *sb);
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int host_symlink(const char *path1, const char *path2);
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int host_uname(struct old_utsname *);
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ssize_t host_write(int fd, const void *buf, size_t nbyte);
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/*
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* Wrappers / one-liners
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*/
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#define host_getmem(size) \
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host_mmap(0, size, HOST_PROT_READ | HOST_PROT_WRITE, \
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HOST_MAP_PRIVATE | HOST_MAP_ANONYMOUS, -1, 0);
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/*
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* Translate Linux errno to FreeBSD errno. The two system have idenitcal errors
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* for 1-34. After that, they differ. Linux also has errno that don't map
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* exactly to FreeBSD's errno, plus the Linux errno are arch dependent >
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* 34. Since we just need to do this for simple cases, use the simple mapping
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* function where -1 to -34 are translated to 1 to 34 and all others are EINVAL.
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* Pass the linux return value, which will be the -errno.
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*/
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static __inline int
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host_to_stand_errno(int e)
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{
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assert(e < 0);
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return((-e) > 34 ? EINVAL : (-e));
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}
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#endif
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