d27f1d4c12
us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr
174 lines
5.6 KiB
C
174 lines
5.6 KiB
C
/*-
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* Copyright (c) 2001 David E. O'Brien
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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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* EABI ELF definitions for the PowerPC architecture.
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* See "PowerPC Embedded Application Binary Interface, 32-Bit Impliementation"
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* [ppc-eabi-1995-01.pdf] for details.
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*/
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#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
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#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */
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#include <sys/elf_generic.h>
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#define ELF_ARCH EM_PPC
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#define ELF_MACHINE_OK(x) ((x) == EM_PPC)
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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 PowerPC 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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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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} Elf32_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 PowerPC). */
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#define AT_ENTRY 9 /* Where interpreter should transfer control. */
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#define AT_DCACHEBSIZE 10 /* Data cache block size for the processor. */
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#define AT_ICACHEBSIZE 11 /* Instruction cache block size for the uP. */
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#define AT_UCACHEBSIZE 12 /* Cache block size, or `0' if cache not unified. */
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#define AT_COUNT 13 /* Count of defined aux entry types. */
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/* Used in John Polstra's testbed stuff. */
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#define AT_DEBUG 14 /* Debugging level. */
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/*
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* Relocation types.
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*/
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#define R_PPC_NONE 0 /* No relocation. */
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#define R_PPC_ADDR32 1
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#define R_PPC_ADDR24 2
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#define R_PPC_ADDR16 3
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#define R_PPC_ADDR16_LO 4
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#define R_PPC_ADDR16_HI 5
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#define R_PPC_ADDR16_HA 6
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#define R_PPC_ADDR14 7
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#define R_PPC_ADDR14_BRTAKEN 8
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#define R_PPC_ADDR14_BRNTAKEN 9
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#define R_PPC_REL24 10
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#define R_PPC_REL14 11
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#define R_PPC_REL14_BRTAKEN 12
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#define R_PPC_REL14_BRNTAKEN 13
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#define R_PPC_GOT16 14
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#define R_PPC_GOT16_LO 15
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#define R_PPC_GOT16_HI 16
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#define R_PPC_GOT16_HA 17
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#define R_PPC_PLTREL24 18
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#define R_PPC_COPY 19
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#define R_PPC_GLOB_DAT 20
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#define R_PPC_JMP_SLOT 21
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#define R_PPC_RELATIVE 22
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#define R_PPC_LOCAL24PC 23
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#define R_PPC_UADDR32 24
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#define R_PPC_UADDR16 25
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#define R_PPC_REL32 26
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#define R_PPC_PLT32 27
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#define R_PPC_PLTREL32 28
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#define R_PPC_PLT16_LO 29
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#define R_PPC_PLT16_HI 30
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#define R_PPC_PLT16_HA 31
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#define R_PPC_SDAREL16 32
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#define R_PPC_SECTOFF 33
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#define R_PPC_SECTOFF_LO 34
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#define R_PPC_SECTOFF_HI 35
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#define R_PPC_SECTOFF_HA 36
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#define R_PPC_COUNT 37 /* Count of defined relocation types. */
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/*
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* The remaining relocs are from the Embedded ELF ABI, and are not in the
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* SVR4 ELF ABI.
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*/
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#define R_PPC_EMB_NADDR32 101
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#define R_PPC_EMB_NADDR16 102
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#define R_PPC_EMB_NADDR16_LO 103
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#define R_PPC_EMB_NADDR16_HI 104
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#define R_PPC_EMB_NADDR16_HA 105
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#define R_PPC_EMB_SDAI16 106
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#define R_PPC_EMB_SDA2I16 107
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#define R_PPC_EMB_SDA2REL 108
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#define R_PPC_EMB_SDA21 109
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#define R_PPC_EMB_MRKREF 110
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#define R_PPC_EMB_RELSEC16 111
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#define R_PPC_EMB_RELST_LO 112
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#define R_PPC_EMB_RELST_HI 113
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#define R_PPC_EMB_RELST_HA 114
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#define R_PPC_EMB_BIT_FLD 115
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#define R_PPC_EMB_RELSDA 116
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/* Count of defined relocation types. */
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#define R_PPC_EMB_COUNT (R_PPC_EMB_RELSDA - R_PPC_EMB_NADDR32 + 1)
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/* Define "machine" characteristics */
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#define ELF_TARG_CLASS ELFCLASS32
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#define ELF_TARG_DATA ELFDATA2MSB
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#define ELF_TARG_MACH EM_PPC
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#define ELF_TARG_VER 1
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#ifdef _KERNEL
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/*
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* On the PowerPC we load the dynamic linker where a userland call
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* to mmap(0, ...) would put it. The rationale behind this
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* calculation is that it leaves room for the heap to grow to
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* its maximum allowed size.
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*/
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#define ELF_RTLD_ADDR(vmspace) \
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(round_page((vm_offset_t)(vmspace)->vm_daddr + MAXDSIZ))
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#endif /* _KERNEL */
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#endif /* !_MACHINE_ELF_H_ */
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