The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/imgact_elf.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1995-1996 Søren Schmidt
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer
   12  *    in this position and unchanged.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/12.0/sys/sys/imgact_elf.h 334165 2018-05-24 16:25:18Z brooks $
   31  */
   32 
   33 #ifndef _SYS_IMGACT_ELF_H_
   34 #define _SYS_IMGACT_ELF_H_
   35 
   36 #include <machine/elf.h>
   37 
   38 #ifdef _KERNEL
   39 
   40 #define AUXARGS_ENTRY(pos, id, val) \
   41     {(pos)->a_type = (id); (pos)->a_un.a_val = (val); (pos)++;}
   42 
   43 struct image_params;
   44 struct thread;
   45 struct vnode;
   46 
   47 /*
   48  * Structure used to pass information from the loader to the
   49  * stack fixup routine.
   50  */
   51 typedef struct {
   52         Elf_Ssize       execfd;
   53         Elf_Size        phdr;
   54         Elf_Size        phent;
   55         Elf_Size        phnum;
   56         Elf_Size        pagesz;
   57         Elf_Size        base;
   58         Elf_Size        flags;
   59         Elf_Size        entry;
   60         Elf_Word        hdr_eflags;             /* e_flags field from ehdr */
   61 } __ElfN(Auxargs);
   62 
   63 typedef struct {
   64         Elf_Note        hdr;
   65         const char *    vendor;
   66         int             flags;
   67         bool            (*trans_osrel)(const Elf_Note *, int32_t *);
   68 #define BN_CAN_FETCH_OSREL      0x0001  /* Deprecated. */
   69 #define BN_TRANSLATE_OSREL      0x0002  /* Use trans_osrel to fetch osrel */
   70                 /* after checking the image ABI specification, if needed. */
   71 } Elf_Brandnote;
   72 
   73 typedef struct {
   74         int brand;
   75         int machine;
   76         const char *compat_3_brand;     /* pre Binutils 2.10 method (FBSD 3) */
   77         const char *emul_path;
   78         const char *interp_path;
   79         struct sysentvec *sysvec;
   80         const char *interp_newpath;
   81         int flags;
   82         Elf_Brandnote *brand_note;
   83         boolean_t       (*header_supported)(struct image_params *);
   84 #define BI_CAN_EXEC_DYN         0x0001
   85 #define BI_BRAND_NOTE           0x0002  /* May have note.ABI-tag section. */
   86 #define BI_BRAND_NOTE_MANDATORY 0x0004  /* Must have note.ABI-tag section. */
   87 #define BI_BRAND_ONLY_STATIC    0x0008  /* Match only interp-less binaries. */
   88 } __ElfN(Brandinfo);
   89 
   90 __ElfType(Auxargs);
   91 __ElfType(Brandinfo);
   92 
   93 #define MAX_BRANDS      8
   94 
   95 int     __elfN(brand_inuse)(Elf_Brandinfo *entry);
   96 int     __elfN(insert_brand_entry)(Elf_Brandinfo *entry);
   97 int     __elfN(remove_brand_entry)(Elf_Brandinfo *entry);
   98 int     __elfN(freebsd_fixup)(register_t **, struct image_params *);
   99 int     __elfN(coredump)(struct thread *, struct vnode *, off_t, int);
  100 size_t  __elfN(populate_note)(int, void *, void *, size_t, void **);
  101 
  102 /* Machine specific function to dump per-thread information. */
  103 void    __elfN(dump_thread)(struct thread *, void *, size_t *);
  104 
  105 extern int __elfN(fallback_brand);
  106 extern Elf_Brandnote __elfN(freebsd_brandnote);
  107 extern Elf_Brandnote __elfN(kfreebsd_brandnote);
  108 #endif /* _KERNEL */
  109 
  110 #endif /* !_SYS_IMGACT_ELF_H_ */

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