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.
139 lines
5.0 KiB
C
139 lines
5.0 KiB
C
/*-
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* Copyright (c) 1996-1997 John D. Polstra.
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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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* $FreeBSD$
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*/
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#ifndef _MACHINE_ELF_H_
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#define _MACHINE_ELF_H_ 1
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/*
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* ELF definitions for the alpha architecture.
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*/
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#include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */
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#define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */
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#include <sys/elf_generic.h>
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#define ELF_ARCH EM_ALPHA
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#define ELF_MACHINE_OK(x) ((x) == EM_ALPHA)
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/*
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* Auxiliary vector entries for passing information to the interpreter.
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*
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* The i386 supplement to the SVR4 ABI specification names this "auxv_t",
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* but POSIX lays claim to all symbols ending with "_t".
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*/
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typedef struct { /* Auxiliary vector entry on initial stack */
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long a_type; /* Entry type. */
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union {
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long a_val; /* Integer value. */
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void *a_ptr; /* Address. */
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void (*a_fcn)(void); /* Function pointer (not used). */
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} a_un;
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} Elf64_Auxinfo;
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__ElfType(Auxinfo);
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/* Values for a_type. */
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#define AT_NULL 0 /* Terminates the vector. */
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#define AT_IGNORE 1 /* Ignored entry. */
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#define AT_EXECFD 2 /* File descriptor of program to load. */
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#define AT_PHDR 3 /* Program header of program already loaded. */
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#define AT_PHENT 4 /* Size of each program header entry. */
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#define AT_PHNUM 5 /* Number of program header entries. */
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#define AT_PAGESZ 6 /* Page size in bytes. */
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#define AT_BASE 7 /* Interpreter's base address. */
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#define AT_FLAGS 8 /* Flags (unused for i386). */
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#define AT_ENTRY 9 /* Where interpreter should transfer control. */
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/*
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* The following non-standard values are used for passing information
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* from John Polstra's testbed program to the dynamic linker. These
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* are expected to go away soon.
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*
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* Unfortunately, these overlap the Linux non-standard values, so they
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* must not be used in the same context.
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*/
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#define AT_BRK 10 /* Starting point for sbrk and brk. */
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#define AT_DEBUG 11 /* Debugging level. */
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/*
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* The following non-standard values are used in Linux ELF binaries.
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*/
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#define AT_NOTELF 10 /* Program is not ELF ?? */
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#define AT_UID 11 /* Real uid. */
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#define AT_EUID 12 /* Effective uid. */
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#define AT_GID 13 /* Real gid. */
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#define AT_EGID 14 /* Effective gid. */
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#define AT_COUNT 15 /* Count of defined aux entry types. */
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/*
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* Relocation types.
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*/
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#define R_ALPHA_NONE 0 /* No reloc */
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#define R_ALPHA_REFLONG 1 /* Direct 32 bit */
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#define R_ALPHA_REFQUAD 2 /* Direct 64 bit */
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#define R_ALPHA_GPREL32 3 /* GP relative 32 bit */
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#define R_ALPHA_LITERAL 4 /* GP relative 16 bit w/optimization */
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#define R_ALPHA_LITUSE 5 /* Optimization hint for LITERAL */
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#define R_ALPHA_GPDISP 6 /* Add displacement to GP */
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#define R_ALPHA_BRADDR 7 /* PC+4 relative 23 bit shifted */
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#define R_ALPHA_HINT 8 /* PC+4 relative 16 bit shifted */
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#define R_ALPHA_SREL16 9 /* PC relative 16 bit */
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#define R_ALPHA_SREL32 10 /* PC relative 32 bit */
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#define R_ALPHA_SREL64 11 /* PC relative 64 bit */
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#define R_ALPHA_OP_PUSH 12 /* OP stack push */
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#define R_ALPHA_OP_STORE 13 /* OP stack pop and store */
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#define R_ALPHA_OP_PSUB 14 /* OP stack subtract */
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#define R_ALPHA_OP_PRSHIFT 15 /* OP stack right shift */
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#define R_ALPHA_GPVALUE 16
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#define R_ALPHA_GPRELHIGH 17
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#define R_ALPHA_GPRELLOW 18
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#define R_ALPHA_IMMED_GP_16 19
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#define R_ALPHA_IMMED_GP_HI32 20
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#define R_ALPHA_IMMED_SCN_HI32 21
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#define R_ALPHA_IMMED_BR_HI32 22
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#define R_ALPHA_IMMED_LO32 23
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#define R_ALPHA_COPY 24 /* Copy symbol at runtime */
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#define R_ALPHA_GLOB_DAT 25 /* Create GOT entry */
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#define R_ALPHA_JMP_SLOT 26 /* Create PLT entry */
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#define R_ALPHA_RELATIVE 27 /* Adjust by program base */
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#define R_ALPHA_COUNT 28
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/* Define "machine" characteristics */
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#define ELF_TARG_CLASS ELFCLASS64
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#define ELF_TARG_DATA ELFDATA2LSB
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#define ELF_TARG_MACH EM_ALPHA
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#define ELF_TARG_VER 1
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#endif /* !_MACHINE_ELF_H_ */
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