mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
c460ac3a00
systems where the data/stack/etc limits are too big for a 32 bit process. Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c. Supply an ia32_fixlimits function. Export the clip/default values to sysctl under the compat.ia32 heirarchy. Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max value rather than the sysctl tweakable variable. This allows mmap to place mappings at sensible locations when limits have been reduced. Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same method as mmap(0, ...) now does. Note that we cannot remove all references to the sysctl tweakable maxdsiz etc variables because /etc/login.conf specifies a datasize of 'unlimited'. And that causes exec etc to fail since it can no longer find space to mmap things.
135 lines
4.6 KiB
C
135 lines
4.6 KiB
C
/*-
|
|
* Copyright (c) 1996-1997 John D. Polstra.
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_ELF_H_
|
|
#define _MACHINE_ELF_H_ 1
|
|
|
|
/*
|
|
* ELF definitions for the i386 architecture.
|
|
*/
|
|
|
|
#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
|
|
#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
|
|
#include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */
|
|
#endif
|
|
|
|
#ifndef __ELF_WORD_SIZE
|
|
#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */
|
|
#endif
|
|
|
|
#include <sys/elf_generic.h>
|
|
|
|
#define ELF_ARCH EM_386
|
|
|
|
#define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486)
|
|
|
|
/*
|
|
* Auxiliary vector entries for passing information to the interpreter.
|
|
*
|
|
* The i386 supplement to the SVR4 ABI specification names this "auxv_t",
|
|
* but POSIX lays claim to all symbols ending with "_t".
|
|
*/
|
|
|
|
typedef struct { /* Auxiliary vector entry on initial stack */
|
|
int a_type; /* Entry type. */
|
|
union {
|
|
long a_val; /* Integer value. */
|
|
void *a_ptr; /* Address. */
|
|
void (*a_fcn)(void); /* Function pointer (not used). */
|
|
} a_un;
|
|
} Elf32_Auxinfo;
|
|
|
|
#if __ELF_WORD_SIZE == 64
|
|
/* Fake for amd64 loader support */
|
|
typedef struct {
|
|
int fake;
|
|
} Elf64_Auxinfo;
|
|
#endif
|
|
|
|
__ElfType(Auxinfo);
|
|
|
|
/* Values for a_type. */
|
|
#define AT_NULL 0 /* Terminates the vector. */
|
|
#define AT_IGNORE 1 /* Ignored entry. */
|
|
#define AT_EXECFD 2 /* File descriptor of program to load. */
|
|
#define AT_PHDR 3 /* Program header of program already loaded. */
|
|
#define AT_PHENT 4 /* Size of each program header entry. */
|
|
#define AT_PHNUM 5 /* Number of program header entries. */
|
|
#define AT_PAGESZ 6 /* Page size in bytes. */
|
|
#define AT_BASE 7 /* Interpreter's base address. */
|
|
#define AT_FLAGS 8 /* Flags (unused for i386). */
|
|
#define AT_ENTRY 9 /* Where interpreter should transfer control. */
|
|
|
|
/*
|
|
* The following non-standard values are used for passing information
|
|
* from John Polstra's testbed program to the dynamic linker. These
|
|
* are expected to go away soon.
|
|
*
|
|
* Unfortunately, these overlap the Linux non-standard values, so they
|
|
* must not be used in the same context.
|
|
*/
|
|
#define AT_BRK 10 /* Starting point for sbrk and brk. */
|
|
#define AT_DEBUG 11 /* Debugging level. */
|
|
|
|
/*
|
|
* The following non-standard values are used in Linux ELF binaries.
|
|
*/
|
|
#define AT_NOTELF 10 /* Program is not ELF ?? */
|
|
#define AT_UID 11 /* Real uid. */
|
|
#define AT_EUID 12 /* Effective uid. */
|
|
#define AT_GID 13 /* Real gid. */
|
|
#define AT_EGID 14 /* Effective gid. */
|
|
|
|
#define AT_COUNT 15 /* Count of defined aux entry types. */
|
|
|
|
/*
|
|
* Relocation types.
|
|
*/
|
|
|
|
#define R_386_NONE 0 /* No relocation. */
|
|
#define R_386_32 1 /* Add symbol value. */
|
|
#define R_386_PC32 2 /* Add PC-relative symbol value. */
|
|
#define R_386_GOT32 3 /* Add PC-relative GOT offset. */
|
|
#define R_386_PLT32 4 /* Add PC-relative PLT offset. */
|
|
#define R_386_COPY 5 /* Copy data from shared object. */
|
|
#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
|
|
#define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */
|
|
#define R_386_RELATIVE 8 /* Add load address of shared object. */
|
|
#define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */
|
|
#define R_386_GOTPC 10 /* Add PC-relative GOT table address. */
|
|
|
|
#define R_386_COUNT 11 /* Count of defined relocation types. */
|
|
|
|
/* Define "machine" characteristics */
|
|
#define ELF_TARG_CLASS ELFCLASS32
|
|
#define ELF_TARG_DATA ELFDATA2LSB
|
|
#define ELF_TARG_MACH EM_386
|
|
#define ELF_TARG_VER 1
|
|
|
|
#endif /* !_MACHINE_ELF_H_ */
|