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userboot
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userboot.h
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userboot_4th
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userboot_lua
Editing: userboot.h
/*- * Copyright (c) 2011 Doug Rabson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ /* * USERBOOT interface versions */ #define USERBOOT_VERSION_1 1 #define USERBOOT_VERSION_2 2 #define USERBOOT_VERSION_3 3 /* * Version 4 added more generic callbacks for setting up * registers and descriptors. The callback structure is * backward compatible (new callbacks have been added at * the tail end). */ #define USERBOOT_VERSION_4 4 /* * Version 5 added a callback for indicating that the guest * should be restarted with a different interpreter. The callback * structure is still backward compatible. */ #define USERBOOT_VERSION_5 5 /* * Exit codes from the loader */ #define USERBOOT_EXIT_QUIT 1 #define USERBOOT_EXIT_REBOOT 2 struct loader_callbacks { /* * Console i/o */ /* * Wait until a key is pressed on the console and then return it */ int (*getc)(void *arg); /* * Write the character ch to the console */ void (*putc)(void *arg, int ch); /* * Return non-zero if a key can be read from the console */ int (*poll)(void *arg); /* * Host filesystem i/o */ /* * Open a file in the host filesystem */ int (*open)(void *arg, const char *filename, void **h_return); /* * Close a file */ int (*close)(void *arg, void *h); /* * Return non-zero if the file is a directory */ int (*isdir)(void *arg, void *h); /* * Read size bytes from a file. The number of bytes remaining * in dst after reading is returned in *resid_return */ int (*read)(void *arg, void *h, void *dst, size_t size, size_t *resid_return); /* * Read an entry from a directory. The entry's inode number is * returned in *fileno_return, its type in *type_return and * the name length in *namelen_return. The name itself is * copied to the buffer name which must be at least PATH_MAX * in size. */ int (*readdir)(void *arg, void *h, uint32_t *fileno_return, uint8_t *type_return, size_t *namelen_return, char *name); /* * Seek to a location within an open file */ int (*seek)(void *arg, void *h, uint64_t offset, int whence); /* * Return some stat(2) related information about the file */ int (*stat)(void *arg, void *h, struct stat *stp); /* * Disk image i/o */ /* * Read from a disk image at the given offset */ int (*diskread)(void *arg, int unit, uint64_t offset, void *dst, size_t size, size_t *resid_return); /* * Write to a disk image at the given offset */ int (*diskwrite)(void *arg, int unit, uint64_t offset, void *src, size_t size, size_t *resid_return); /* * Guest virtual machine i/o */ /* * Copy to the guest address space */ int (*copyin)(void *arg, const void *from, uint64_t to, size_t size); /* * Copy from the guest address space */ int (*copyout)(void *arg, uint64_t from, void *to, size_t size); /* * Set a guest register value */ void (*setreg)(void *arg, int, uint64_t); /* * Set a guest MSR value */ void (*setmsr)(void *arg, int, uint64_t); /* * Set a guest CR value */ void (*setcr)(void *arg, int, uint64_t); /* * Set the guest GDT address */ void (*setgdt)(void *arg, uint64_t, size_t); /* * Transfer control to the guest at the given address */ void (*exec)(void *arg, uint64_t pc); /* * Misc */ /* * Sleep for usec microseconds */ void (*delay)(void *arg, int usec); /* * Exit with the given exit code */ void (*exit)(void *arg, int v); /* * Return guest physical memory map details */ void (*getmem)(void *arg, uint64_t *lowmem, uint64_t *highmem); /* * ioctl interface to the disk device */ int (*diskioctl)(void *arg, int unit, u_long cmd, void *data); /* * Returns an environment variable in the form "name=value". * * If there are no more variables that need to be set in the * loader environment then return NULL. * * 'num' is used as a handle for the callback to identify which * environment variable to return next. It will begin at 0 and * each invocation will add 1 to the previous value of 'num'. */ char * (*getenv)(void *arg, int num); /* * Version 4 additions. */ int (*vm_set_register)(void *arg, int vcpu, int reg, uint64_t val); int (*vm_set_desc)(void *arg, int vcpu, int reg, uint64_t base, u_int limit, u_int access); /* * Version 5 addition. */ void (*swap_interpreter)(void *arg, const char *interp); };
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