9624d94701
using the o32 ABI. This mostly follows nwhitehorn's lead in implementing
COMPAT_FREEBSD32 on powerpc64.
o) Add a new type to the freebsd32 compat layer, time32_t, which is time_t in the
32-bit ABI being used. Since the MIPS port is relatively-new, even the 32-bit
ABIs use a 64-bit time_t.
o) Because time{spec,val}32 has the same size and layout as time{spec,val} on MIPS
with 32-bit compatibility, then, disable some code which assumes otherwise
wrongly when built for MIPS. A more general macro to check in this case would
seem like a good idea eventually. If someone adds support for using n32
userland with n64 kernels on MIPS, then they will have to add a variety of
flags related to each piece of the ABI that can vary. That's probably the
right time to generalize further.
o) Add MIPS to the list of architectures which use PAD64_REQUIRED in the
freebsd32 compat code. Probably this should be generalized at some point.
Reviewed by: gonzo
293 lines
11 KiB
C
293 lines
11 KiB
C
/* $OpenBSD: elf_abi.h,v 1.1 1998/01/28 11:14:41 pefo Exp $ */
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/*-
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* Copyright (c) 1996 Per Fogelstrom
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed under OpenBSD by
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* Per Fogelstrom.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* 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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* JNPR: elf.h,v 1.4 2006/12/02 09:53:40 katta
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* $FreeBSD$
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*
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*/
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#ifndef _MACHINE_ELF_H_
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#define _MACHINE_ELF_H_
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/* Information taken from MIPS ABI supplemental */
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#ifndef __ELF_WORD_SIZE
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#if defined(__mips_n64)
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#define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */
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#else
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#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */
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#endif
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#endif
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#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
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#include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */
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#include <sys/elf_generic.h>
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#define ELF_ARCH EM_MIPS
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#if __ELF_WORD_SIZE == 32
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#define ELF_ARCH32 EM_MIPS
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#endif
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#define ELF_MACHINE_OK(x) ((x) == EM_MIPS || (x) == EM_MIPS_RS4_BE)
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/* Architecture dependent Segment types - p_type */
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#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */
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/* Architecture dependent d_tag field for Elf32_Dyn. */
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#define DT_MIPS_RLD_VERSION 0x70000001 /* Runtime Linker Interface ID */
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#define DT_MIPS_TIME_STAMP 0x70000002 /* Timestamp */
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#define DT_MIPS_ICHECKSUM 0x70000003 /* Cksum of ext str and com sizes */
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#define DT_MIPS_IVERSION 0x70000004 /* Version string (string tbl index) */
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#define DT_MIPS_FLAGS 0x70000005 /* Flags */
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#define DT_MIPS_BASE_ADDRESS 0x70000006 /* Segment base address */
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#define DT_MIPS_CONFLICT 0x70000008 /* Adr of .conflict section */
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#define DT_MIPS_LIBLIST 0x70000009 /* Address of .liblist section */
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#define DT_MIPS_LOCAL_GOTNO 0x7000000a /* Number of local .GOT entries */
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#define DT_MIPS_CONFLICTNO 0x7000000b /* Number of .conflict entries */
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#define DT_MIPS_LIBLISTNO 0x70000010 /* Number of .liblist entries */
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#define DT_MIPS_SYMTABNO 0x70000011 /* Number of .dynsym entries */
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#define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */
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#define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in .dynsym */
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#define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */
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#define DT_MIPS_RLD_MAP 0x70000016 /* Address of debug map pointer */
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#define DT_PROCNUM (DT_MIPS_RLD_MAP - DT_LOPROC + 1)
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/*
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* Legal values for e_flags field of Elf32_Ehdr.
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*/
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#define EF_MIPS_NOREORDER 1 /* .noreorder was used */
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#define EF_MIPS_PIC 2 /* Contains PIC code */
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#define EF_MIPS_CPIC 4 /* Uses PIC calling sequence */
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#define EF_MIPS_ARCH 0xf0000000 /* MIPS architecture level */
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/*
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* Mips special sections.
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*/
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#define SHN_MIPS_ACOMMON 0xff00 /* Allocated common symbols */
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#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */
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#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */
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/*
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* Legal values for sh_type field of Elf32_Shdr.
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*/
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#define SHT_MIPS_LIBLIST 0x70000000 /* Shared objects used in link */
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#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicting symbols */
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#define SHT_MIPS_GPTAB 0x70000003 /* Global data area sizes */
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#define SHT_MIPS_UCODE 0x70000004 /* Reserved for SGI/MIPS compilers */
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#define SHT_MIPS_DEBUG 0x70000005 /* MIPS ECOFF debugging information */
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#define SHT_MIPS_REGINFO 0x70000006 /* Register usage information */
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/*
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* Legal values for sh_flags field of Elf32_Shdr.
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*/
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#define SHF_MIPS_GPREL 0x10000000 /* Must be part of global data area */
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/*
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* Entries found in sections of type SHT_MIPS_GPTAB.
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*/
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typedef union {
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struct {
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Elf32_Word gt_current_g_value; /* -G val used in compilation */
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Elf32_Word gt_unused; /* Not used */
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} gt_header; /* First entry in section */
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struct {
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Elf32_Word gt_g_value; /* If this val were used for -G */
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Elf32_Word gt_bytes; /* This many bytes would be used */
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} gt_entry; /* Subsequent entries in section */
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} Elf32_gptab;
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typedef union {
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struct {
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Elf64_Word gt_current_g_value; /* -G val used in compilation */
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Elf64_Word gt_unused; /* Not used */
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} gt_header; /* First entry in section */
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struct {
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Elf64_Word gt_g_value; /* If this val were used for -G */
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Elf64_Word gt_bytes; /* This many bytes would be used */
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} gt_entry; /* Subsequent entries in section */
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} Elf64_gptab;
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/*
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* Entry found in sections of type SHT_MIPS_REGINFO.
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*/
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typedef struct {
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Elf32_Word ri_gprmask; /* General registers used */
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Elf32_Word ri_cprmask[4]; /* Coprocessor registers used */
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Elf32_Sword ri_gp_value; /* $gp register value */
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} Elf32_RegInfo;
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typedef struct {
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Elf64_Word ri_gprmask; /* General registers used */
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Elf64_Word ri_cprmask[4]; /* Coprocessor registers used */
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Elf64_Sword ri_gp_value; /* $gp register value */
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} Elf64_RegInfo;
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/*
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* Mips relocations.
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*/
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#define R_MIPS_NONE 0 /* No reloc */
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#define R_MIPS_16 1 /* Direct 16 bit */
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#define R_MIPS_32 2 /* Direct 32 bit */
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#define R_MIPS_REL32 3 /* PC relative 32 bit */
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#define R_MIPS_26 4 /* Direct 26 bit shifted */
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#define R_MIPS_HI16 5 /* High 16 bit */
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#define R_MIPS_LO16 6 /* Low 16 bit */
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#define R_MIPS_GPREL16 7 /* GP relative 16 bit */
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#define R_MIPS_LITERAL 8 /* 16 bit literal entry */
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#define R_MIPS_GOT16 9 /* 16 bit GOT entry */
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#define R_MIPS_PC16 10 /* PC relative 16 bit */
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#define R_MIPS_CALL16 11 /* 16 bit GOT entry for function */
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#define R_MIPS_GPREL32 12 /* GP relative 32 bit */
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#define R_MIPS_GOTHI16 21 /* GOT HI 16 bit */
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#define R_MIPS_GOTLO16 22 /* GOT LO 16 bit */
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#define R_MIPS_CALLHI16 30 /* upper 16 bit GOT entry for function */
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#define R_MIPS_CALLLO16 31 /* lower 16 bit GOT entry for function */
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/*
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* These are from the 64-bit Irix ELF ABI
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*/
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#define R_MIPS_SHIFT5 16
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#define R_MIPS_SHIFT6 17
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#define R_MIPS_64 18
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#define R_MIPS_GOT_DISP 19
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#define R_MIPS_GOT_PAGE 20
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#define R_MIPS_GOT_OFST 21
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#define R_MIPS_GOT_HI16 22
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#define R_MIPS_GOT_LO16 23
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#define R_MIPS_SUB 24
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#define R_MIPS_INSERT_A 25
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#define R_MIPS_INSERT_B 26
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#define R_MIPS_DELETE 27
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#define R_MIPS_HIGHER 28
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#define R_MIPS_HIGHEST 29
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#define R_MIPS_SCN_DISP 32
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#define R_MIPS_REL16 33
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#define R_MIPS_ADD_IMMEDIATE 34
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#define R_MIPS_PJUMP 35
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#define R_MIPS_RELGOT 36
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#define R_MIPS_JALR 37
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/*
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* TLS relocations
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*/
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#define R_MIPS_TLS_DTPMOD32 38 /* Module number 32 bit */
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#define R_MIPS_TLS_DTPREL32 39 /* Module-relative offset 32 bit */
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#define R_MIPS_TLS_DTPMOD64 40 /* Module number 64 bit */
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#define R_MIPS_TLS_DTPREL64 41 /* Module-relative offset 64 bit */
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#define R_MIPS_TLS_GD 42 /* 16 bit GOT offset for GD */
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#define R_MIPS_TLS_LDM 43 /* 16 bit GOT offset for LDM */
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#define R_MIPS_TLS_DTPREL_HI16 44 /* Module-relative offset, high 16 bits */
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#define R_MIPS_TLS_DTPREL_LO16 45 /* Module-relative offset, low 16 bits */
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#define R_MIPS_TLS_GOTTPREL 46 /* 16 bit GOT offset for IE */
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#define R_MIPS_TLS_TPREL32 47 /* TP-relative offset, 32 bit */
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#define R_MIPS_TLS_TPREL64 48 /* TP-relative offset, 64 bit */
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#define R_MIPS_TLS_TPREL_HI16 49 /* TP-relative offset, high 16 bits */
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#define R_MIPS_TLS_TPREL_LO16 50 /* TP-relative offset, low 16 bits */
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#define R_MIPS_max 51
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#define R_TYPE(name) __CONCAT(R_MIPS_,name)
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/* Define "machine" characteristics */
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#if __ELF_WORD_SIZE == 32
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#define ELF_TARG_CLASS ELFCLASS32
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#else
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#define ELF_TARG_CLASS ELFCLASS64
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#endif
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#ifdef __MIPSEB__
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#define ELF_TARG_DATA ELFDATA2MSB
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#else
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#define ELF_TARG_DATA ELFDATA2LSB
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#endif
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#define ELF_TARG_MACH EM_MIPS
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#define ELF_TARG_VER 1
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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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int a_type; /* Entry type. */
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union {
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int 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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} Elf32_Auxinfo;
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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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#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_EXECPATH 15 /* Path to the executable. */
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#define AT_CANARY 16 /* Canary for SSP */
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#define AT_CANARYLEN 17 /* Length of the canary. */
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#define AT_OSRELDATE 18 /* OSRELDATE. */
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#define AT_NCPUS 19 /* Number of CPUs. */
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#define AT_PAGESIZES 20 /* Pagesizes. */
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#define AT_PAGESIZESLEN 21 /* Number of pagesizes. */
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#define AT_STACKPROT 23 /* Initial stack protection. */
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#define AT_COUNT 24 /* Count of defined aux entry types. */
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#define ET_DYN_LOAD_ADDR 0x0120000
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/*
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* Constant to mark start of symtab/strtab saved by trampoline
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*/
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#define SYMTAB_MAGIC 0x64656267
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#endif /* !_MACHINE_ELF_H_ */
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