bc84de741d
Early in boot, we need to create the normal stdin/out/err env for the boot loader to run in. To do that, we need to open the console and duplicate the file descriptors which requires dup(2). Implement a wrapper as host_dup. Sponsored by: Netflix
120 lines
3.9 KiB
C
120 lines
3.9 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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* $FreeBSD$
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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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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 int64_t host_nlink_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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* 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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#define HOST_AT_FDCWD -100 /* Relative to current directory */
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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_fstat(int fd, struct host_kstat *sb);
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int host_getdents(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_kexec_load(uint32_t start, int nsegs, uint32_t segs, uint32_t 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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void *host_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off);
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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) host_mmap(0, size, 3 /* RW */, 0x22 /* ANON */, -1, 0);
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#endif
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