0cad2aa2dd
Currently, we parse notes for the values of ELF FreeBSD feature flags and osrel. Knowing these values, or knowing that image does not carry the note if pointers are NULL, is useful to decide which ABI variant (brand) we want to activate for the image. Right now this is only a plumbing change Tested by: pho Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D25273
121 lines
4.1 KiB
C
121 lines
4.1 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 1995-1996 Søren Schmidt
|
|
* 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
|
|
* in this position and unchanged.
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_IMGACT_ELF_H_
|
|
#define _SYS_IMGACT_ELF_H_
|
|
|
|
#include <machine/elf.h>
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#define AUXARGS_ENTRY(pos, id, val) \
|
|
{(pos)->a_type = (id); (pos)->a_un.a_val = (val); (pos)++;}
|
|
#if (defined(__LP64__) && __ELF_WORD_SIZE == 32)
|
|
#define AUXARGS_ENTRY_PTR(pos, id, ptr) \
|
|
{(pos)->a_type = (id); (pos)->a_un.a_val = (uintptr_t)(ptr); (pos)++;}
|
|
#else
|
|
#define AUXARGS_ENTRY_PTR(pos, id, ptr) \
|
|
{(pos)->a_type = (id); (pos)->a_un.a_ptr = (ptr); (pos)++;}
|
|
#endif
|
|
|
|
struct image_params;
|
|
struct thread;
|
|
struct vnode;
|
|
|
|
/*
|
|
* Structure used to pass information from the loader to the
|
|
* stack fixup routine.
|
|
*/
|
|
typedef struct {
|
|
Elf_Ssize execfd;
|
|
Elf_Size phdr;
|
|
Elf_Size phent;
|
|
Elf_Size phnum;
|
|
Elf_Size pagesz;
|
|
Elf_Size base;
|
|
Elf_Size flags;
|
|
Elf_Size entry;
|
|
Elf_Word hdr_eflags; /* e_flags field from ehdr */
|
|
} __ElfN(Auxargs);
|
|
|
|
typedef struct {
|
|
Elf_Note hdr;
|
|
const char * vendor;
|
|
int flags;
|
|
bool (*trans_osrel)(const Elf_Note *, int32_t *);
|
|
#define BN_CAN_FETCH_OSREL 0x0001 /* Deprecated. */
|
|
#define BN_TRANSLATE_OSREL 0x0002 /* Use trans_osrel to fetch osrel */
|
|
/* after checking the image ABI specification, if needed. */
|
|
} Elf_Brandnote;
|
|
|
|
typedef struct {
|
|
int brand;
|
|
int machine;
|
|
const char *compat_3_brand; /* pre Binutils 2.10 method (FBSD 3) */
|
|
const char *emul_path;
|
|
const char *interp_path;
|
|
struct sysentvec *sysvec;
|
|
const char *interp_newpath;
|
|
int flags;
|
|
Elf_Brandnote *brand_note;
|
|
boolean_t (*header_supported)(struct image_params *,
|
|
int32_t *, uint32_t *);
|
|
#define BI_CAN_EXEC_DYN 0x0001
|
|
#define BI_BRAND_NOTE 0x0002 /* May have note.ABI-tag section. */
|
|
#define BI_BRAND_NOTE_MANDATORY 0x0004 /* Must have note.ABI-tag section. */
|
|
#define BI_BRAND_ONLY_STATIC 0x0008 /* Match only interp-less binaries. */
|
|
} __ElfN(Brandinfo);
|
|
|
|
__ElfType(Auxargs);
|
|
__ElfType(Brandinfo);
|
|
|
|
#define MAX_BRANDS 8
|
|
|
|
int __elfN(brand_inuse)(Elf_Brandinfo *entry);
|
|
int __elfN(insert_brand_entry)(Elf_Brandinfo *entry);
|
|
int __elfN(remove_brand_entry)(Elf_Brandinfo *entry);
|
|
int __elfN(freebsd_fixup)(uintptr_t *, struct image_params *);
|
|
int __elfN(coredump)(struct thread *, struct vnode *, off_t, int);
|
|
size_t __elfN(populate_note)(int, void *, void *, size_t, void **);
|
|
void __elfN(stackgap)(struct image_params *, uintptr_t *);
|
|
int __elfN(freebsd_copyout_auxargs)(struct image_params *, uintptr_t);
|
|
|
|
/* Machine specific function to dump per-thread information. */
|
|
void __elfN(dump_thread)(struct thread *, void *, size_t *);
|
|
|
|
extern int __elfN(fallback_brand);
|
|
extern Elf_Brandnote __elfN(freebsd_brandnote);
|
|
extern Elf_Brandnote __elfN(kfreebsd_brandnote);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_SYS_IMGACT_ELF_H_ */
|