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0d5d0b20dc
- Use format-independant module allocator. - Conditionalise ISA PnP support. - Simplify PnP enumerator interface. - Improve module/object searching. - Add missing depend/install targets in BTX makefiles. - Pass the kernel environment and module data in extended bootinfo fields. - Add a pointer to the end of the kernel + modules in bootinfo. - Fix parsing of old-style kernel arguments.
323 lines
10 KiB
C
323 lines
10 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: bootstrap.h,v 1.4 1998/09/04 02:43:26 msmith Exp $
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*/
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#include <sys/types.h>
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/* XXX debugging */
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extern struct console vidconsole;
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#define MARK(s, c) {vidconsole.c_out(s); vidconsole.c_out(c); while (!vidconsole.c_ready()) ; vidconsole.c_in();}
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/*
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* Generic device specifier; architecture-dependant
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* versions may be larger, but should be allowed to
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* overlap.
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*/
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struct devdesc
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{
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struct devsw *d_dev;
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int d_type;
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#define DEVT_NONE 0
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#define DEVT_DISK 1
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#define DEVT_NET 2
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};
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/* Commands and return values; nonzero return sets command_errmsg != NULL */
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typedef int (bootblk_cmd_t)(int argc, char *argv[]);
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extern char *command_errmsg;
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extern char command_errbuf[]; /* XXX blah, length */
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#define CMD_OK 0
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#define CMD_ERROR 1
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/* interp.c */
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extern void interact(void);
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extern void source(char *filename);
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/* interp_parse.c */
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extern int parse(int *argc, char ***argv, char *str);
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/* boot.c */
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extern int autoboot(int delay, char *prompt);
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/* misc.c */
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extern char *unargv(int argc, char *argv[]);
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extern size_t strlenout(vm_offset_t str);
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extern char *strdupout(vm_offset_t str);
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/*
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* Modular console support.
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*/
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struct console
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{
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char *c_name;
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char *c_desc;
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int c_flags;
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#define C_PRESENTIN (1<<0)
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#define C_PRESENTOUT (1<<1)
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#define C_ACTIVEIN (1<<2)
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#define C_ACTIVEOUT (1<<3)
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void (* c_probe)(struct console *cp); /* set c_flags to match hardware */
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int (* c_init)(int arg); /* reinit XXX may need more args */
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void (* c_out)(int c); /* emit c */
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int (* c_in)(void); /* wait for and return input */
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int (* c_ready)(void); /* return nonzer if input waiting */
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};
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extern struct console *consoles[];
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extern void cons_probe(void);
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/*
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* Plug-and-play enumerator/configurator interface.
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*/
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struct pnpident
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{
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char *id_ident; /* ASCII identifier, actual format varies with bus/handler */
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struct pnpident *id_next; /* the next identifier */
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};
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struct pnphandler;
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struct pnpinfo
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{
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struct pnpident *pi_ident; /* list of identifiers */
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int pi_revision; /* optional revision (or -1) if not supported */
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char *pi_module; /* module/args nominated to handle device */
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int pi_argc; /* module arguments */
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char **pi_argv;
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struct pnphandler *pi_handler; /* handler which detected this device */
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struct pnpinfo *pi_next;
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};
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struct pnphandler
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{
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char *pp_name; /* handler/bus name */
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void (* pp_enumerate)(struct pnpinfo **); /* add detected devices to chain */
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};
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extern struct pnphandler *pnphandlers[]; /* provided by MD code */
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extern void pnp_addident(struct pnpinfo *pi, char *ident);
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/*
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* Module metadata header.
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*
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* Metadata are allocated on our heap, and copied into kernel space
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* before executing the kernel.
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*/
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struct module_metadata
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{
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size_t md_size;
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u_int16_t md_type;
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struct module_metadata *md_next;
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char md_data[0]; /* data are immediately appended */
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};
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/*
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* Loaded module information.
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*
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* At least one module (the kernel) must be loaded in order to boot.
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* The kernel is always loaded first.
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*
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* String fields (m_name, m_type) should be dynamically allocated.
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*/
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struct loaded_module
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{
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char *m_name; /* module name */
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char *m_type; /* verbose module type, eg 'ELF kernel', 'pnptable', etc. */
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char *m_args; /* arguments for the module */
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struct module_metadata *m_metadata; /* metadata that will be placed in the module directory */
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int m_loader; /* index of the loader that read the file */
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vm_offset_t m_addr; /* load address */
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size_t m_size; /* module size */
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struct loaded_module *m_next; /* next module */
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};
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struct module_format
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{
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/* Load function must return EFTYPE if it can't handle the module supplied */
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int (* l_load)(char *filename, vm_offset_t dest, struct loaded_module **result);
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/* Only a loader that will load a kernel (first module) should have an exec handler */
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int (* l_exec)(struct loaded_module *mp);
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};
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extern struct module_format *module_formats[]; /* supplied by consumer */
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extern struct loaded_module *loaded_modules;
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extern int mod_load(char *name, int argc, char *argv[]);
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extern int mod_loadobj(char *type, char *name);
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extern struct loaded_module *mod_findmodule(char *name, char *type);
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extern void mod_addmetadata(struct loaded_module *mp, int type, size_t size, void *p);
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extern struct module_metadata *mod_findmetadata(struct loaded_module *mp, int type);
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extern void mod_discard(struct loaded_module *mp);
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extern struct loaded_module *mod_allocmodule(void);
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/* MI module loaders */
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extern int aout_loadmodule(char *filename, vm_offset_t dest, struct loaded_module **result);
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extern vm_offset_t aout_findsym(char *name, struct loaded_module *mp);
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/* extern int elf_loadmodule(char *filename, vm_offset_t dest, struct loaded_module **result); */
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/*
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* Module information subtypes
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*
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* XXX these are copies of the defines in <sys/linker.h>, and should be nuked
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* XXX before being committed.
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*/
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#define MODINFO_NAME 0x0000
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#define MODINFO_TYPE 0x0001
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#define MODINFO_ADDR 0x0002
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#define MODINFO_SIZE 0x0003
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#define MODINFO_METADATA 0x8000
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#define MODINFOMD_AOUTEXEC 0x0001 /* a.out exec header */
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#define MODINFOMD_ELFHDR 0x0002 /* ELF header */
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#define MODINFOMD_NOCOPY 0x8000 /* don't copy this metadata to the kernel */
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#define KLD_IDENT_SYMNAME "kld_identifier_"
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#define MODINFOMD_KLDIDENT (MODINFOMD_NOCOPY | 0x4000)
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#define MODINFOMD_KLDDEP (MODINFOMD_NOCOPY | 0x4001)
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#if defined(__ELF__)
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/*
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* Alpha GAS needs an align before the section change. It seems to assume
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* that after the .previous, it is aligned, so the following .align 3 is
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* ignored. Since the previous instructions often contain strings, this is
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* a problem.
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*/
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#ifdef __alpha__
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#define MAKE_SET(set, sym) \
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__asm(".align 3"); \
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__asm(".section .set." #set ",\"aw\""); \
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__asm(".quad " #sym); \
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__asm(".previous")
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#else
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#define MAKE_SET(set, sym) \
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__asm(".section .set." #set ",\"aw\""); \
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__asm(".long " #sym); \
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__asm(".previous")
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#endif
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#define TEXT_SET(set, sym) MAKE_SET(set, sym)
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#define DATA_SET(set, sym) MAKE_SET(set, sym)
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#define BSS_SET(set, sym) MAKE_SET(set, sym)
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#define ABS_SET(set, sym) MAKE_SET(set, sym)
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#else
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/*
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* Linker set support, directly from <sys/kernel.h>
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*
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* NB: the constants defined below must match those defined in
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* ld/ld.h. Since their calculation requires arithmetic, we
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* can't name them symbolically (e.g., 23 is N_SETT | N_EXT).
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*/
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#define MAKE_SET(set, sym, type) \
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static void const * const __set_##set##_sym_##sym = &sym; \
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__asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym)
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#define TEXT_SET(set, sym) MAKE_SET(set, sym, 23)
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#define DATA_SET(set, sym) MAKE_SET(set, sym, 25)
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#define BSS_SET(set, sym) MAKE_SET(set, sym, 27)
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#define ABS_SET(set, sym) MAKE_SET(set, sym, 21)
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#endif
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struct linker_set {
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int ls_length;
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const void *ls_items[1]; /* really ls_length of them, trailing NULL */
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};
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/*
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* Support for commands
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*/
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struct bootblk_command
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{
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const char *c_name;
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const char *c_desc;
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bootblk_cmd_t *c_fn;
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};
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#define COMMAND_SET(tag, key, desc, func) \
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static bootblk_cmd_t func; \
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static struct bootblk_command _cmd_ ## tag = { key, desc, func }; \
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DATA_SET(Xcommand_set, _cmd_ ## tag);
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extern struct linker_set Xcommand_set;
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/*
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* The intention of the architecture switch is to provide a convenient
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* encapsulation of the interface between the bootstrap MI and MD code.
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* MD code may selectively populate the switch at runtime based on the
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* actual configuration of the target system.
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*/
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struct arch_switch
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{
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/* Automatically load modules as required by detected hardware */
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int (* arch_autoload)();
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/* Locate the device for (name), return pointer to tail in (*path) */
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int (*arch_getdev)(void **dev, char *name, char **path);
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/* Copy from local address space to module address space, similar to bcopy() */
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int (*arch_copyin)(void *src, vm_offset_t dest, size_t len);
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/* Copy to local address space from module address space, similar to bcopy() */
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int (*arch_copyout)(vm_offset_t src, void *dest, size_t len);
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/* Read from file to module address space, same semantics as read() */
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int (*arch_readin)(int fd, vm_offset_t dest, size_t len);
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/* Perform ISA byte port I/O (only for systems with ISA) */
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int (*arch_isainb)(int port);
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void (*arch_isaoutb)(int port, int value);
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};
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extern struct arch_switch archsw;
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/* This must be provided by the MD code, but should it be in the archsw? */
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extern void delay(int delay);
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/*
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* XXX these belong in a system header
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*/
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#define KLD_NAMELEN 32
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struct kld_module_dependancy
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{
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char kd_name[KLD_NAMELEN];
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u_int32_t kd_version;
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};
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struct kld_module_identifier
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{
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u_int32_t ki_kldversion;
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char ki_name[KLD_NAMELEN];
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u_int32_t ki_version;
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struct kld_module_dependancy *ki_deps;
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int ki_ndeps;
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size_t ki_depsize;
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};
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/*
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* Use the depsize field in the identifier to correctly index a
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* dependancy.
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*/
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#define KLD_GETDEP(ki, kd, n) (struct kld_module_dependancy *)((char *)(kd) + ((ki)->ki_depsize * (n)))
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