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nuttx/include/nuttx/poff.h

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/***************************************************************************
* include/nuttx/poff.h
* Definitions for the P-Code Object File Format (POFF)
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
***************************************************************************/
#ifndef __INCLUDE_NUXX_POFF_H
#define __INCLUDE_NUXX_POFF_H
/***************************************************************************
* Included Files
***************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
/***************************************************************************
* Pre-processor Definitions
***************************************************************************/
/* Definitions for the fh_ident field of the poffHdr_t */
#define FHI_MAG0 0 /* fh_ident[] indices */
#define FHI_MAG1 1
#define FHI_MAG2 2
#define FHI_MAG3 3
#define FHI_NIDENT 4
#define FHI_POFF_MAG0 'P'
#define FHI_POFF_MAG1 'O'
#define FHI_POFF_MAG2 'F'
#define FHI_POFF_MAG3 'F'
#define FHI_POFF_MAG "POFF"
/* Definitions for fh_version */
#define FHV_NONE 0
#define FHV_CURRENT 1
/* Definitions for the fh_type */
#define FHT_NONE 0 /* Shouldn't happen */
#define FHT_EXEC 1 /* Pascal program executable */
#define FHT_SHLIB 2 /* Pascal shared library */
#define FHT_PROGRAM 3 /* Pascal program object */
#define FHT_UNIT 4 /* Pascal unit object */
#define FHT_NTYPES 5
/* Definitions for fh_arch */
#define FHAW_INSN16 0 /* Data width is 16 bits */
#define FHAW_INSN32 1 /* Data width is 32 bits */
#define FHAC_PCODE 0 /* Stack oriented P-Code machine class */
#define FHAC_REGM 1 /* Generalized register machine class */
#define MK_FH_ARCH(c,w) (((c)<<4)|(w))
#define GET_FH_CLASS(fha) ((fha) >> 4)
#define GET_FH_WIDTH(fha) ((fha) & 0x0f)
#define FHA_PCODE_INSN16 MK_FH_ARCH(FHAC_PCODE,FHAW_INSN16)
#define FHA_PCODE_INSN32 MK_FH_ARCH(FHAC_PCODE,FHAW_INSN32)
#define FHA_REGM_INSN16 MK_FH_ARCH(FHAC_REGM,FHAW_INSN16)
#define FHA_REGM_INSN32 MK_FH_ARCH(FHAC_REGM,FHAW_INSN32)
#ifdef CONFIG_INSN16
# define FHA_PCODE FHA_PCODE_INSN16
# define FHA_REGM FHA_REGM_INSN16
#endif
#ifdef CONFIG_INSN32
# define FHA_PCODE FHA_PCODE_INSN32
# define FHA_REGM FHA_REGM_INSN16
#endif
/* Definitions for sh_type */
#define SHT_NULL 0 /* Shouldn't happen */
#define SHT_PROGDATA 1 /* Program data */
#define SHT_SYMTAB 2 /* Symbol table */
#define SHT_STRTAB 3 /* String table */
#define SHT_REL 4 /* Relocation data */
#define SHT_FILETAB 5 /* File table */
#define SHT_LINENO 6 /* Line number data */
#define SHT_DEBUG 7 /* Procedure/Function info */
#define SHT_NTYPES 8
/* Definitions for sh_flags */
#define SHF_WRITE 0x01 /* Section is write-able */
#define SHF_ALLOC 0x02 /* Memory must be allocated for setion */
#define SHF_EXEC 0x04 /* Section contains program data */
/* Values for st_type */
#define STT_NONE 0 /* Should not occur */
#define STT_DATA 1 /* Stack data section symbol */
#define STT_RODATA 2 /* Read only data section symbol */
#define STT_PROC 3 /* Procedure entry point */
#define STT_FUNC 4 /* Function entry point */
#define STT_NTYPES 5
/* Values for st_align. Any power of two numeric value can be
* used, but the following are defined for convenience.
*/
#define STA_NONE 0 /* Should not occur */
#define STA_8BIT 1 /* 8-bit byte alignment */
#define STA_16BIT 2 /* 16-bit half word alignment */
#define STA_32BIT 4 /* 32-bit word alignment */
#define STA_64BIT 8 /* 32-bit double word alignment */
/* Values for st_flags */
#define STF_NONE 0x00
#define STF_UNDEFINED 0x01 /* Symbol is undefined (imported) */
/* P-Code relocation types (see RLI_type) */
#define RLT_NONE 0 /* Should not occur */
#define RLT_PCAL 1 /* PCAL to external proc/func */
#define RLT_LDST 2 /* LA or LAX to external stack loc */
#define RLT_NTYPES 3
/* The following are used with relocation table rl_info field */
#define RLI_SYM(x) ((x) >> 8) /* Symbol index */
#define RLI_TYPE(x) ((x) & 0xff) /* Reloc type */
#define RLI_MAKE(s,t) (((uint32_t)(s) << 8) | ((t) & 0xff))
/***************************************************************************
* Public Types
***************************************************************************/
/* POFF file header */
struct poff_fileheader_s
{
/* fh_ident holds the four characters 'P', 'O', 'F', 'F'. See the FHI_
* definitions above.
*/
uint8_t fh_ident[FHI_NIDENT];
/* fh_version holds the version of the POFF file format. This should
* always be FHV_CURRENT.
*/
uint8_t fh_version;
/* fh_type holds the type of binary carry by the POFF file.
* See the FHT_ definitions above.
*/
uint8_t fh_type;
/* fh_arch holds the architecture identifier. See the FHA_
* definitions above.
*/
uint8_t fh_arch;
/* Pad so that the next field is aligned */
uint8_t fh_padding;
/* fh_shsize is the size a section header. This should be
* sizeof(poffSectionHeader_t)
*/
uint16_t fh_shsize;
/* fh_num is the number of section headers in section header
* list. The total size of the section header block is then
* fh_shsize * fh_shnum.
*/
uint16_t fh_shnum;
/* fh_name is an offset into the string table section data.
* It refers to a name associated with fh_type that determines
* the specific instances of the type.
*/
uint32_t fh_name;
/* For fhi_type = {FHI_EXEC or FHI_PROGRAM}, fh_entry holds the
* entry point into the program. For FHI_PROGRAM, this entry point
* is a instruction space label. For FHI_EXEC, this entry point
* is an instruction space address offset (from address zero).
*/
uint32_t fh_entry;
/* fh_shoff is the file offset to the beginning of the table of file
* headers. fh_shoff will most likely be sizeof(poffFileHeader_t).
*/
uint32_t fh_shoff;
};
typedef struct poff_fileheader_s poff_fileheader_t;
/* POFF section header */
struct poff_sectionhdr_s
{
/* sh_type is the type of section described by this header.
* See the SHT_ definitions above.
*/
uint8_t sh_type;
/* These flags describe the characteristics of the section. See the
* SHF_ definitions above.
*/
uint8_t sh_flags;
/* If the section holds a table of fixed sized entries, sh_entsize
* gives the size of one entry. The number of entries can then be
* obtained by dividing sh_size by sh_entsize.
*/
uint16_t sh_entsize;
/* sh_name is an offset into the string table section data.
* It refers to a name associated with section.
*/
uint32_t sh_name;
/* If the section is loaded into memory (SHF_ALLOC), then this
* address holds the address at which the data must be loaded
* (if applicable).
*/
uint32_t sh_addr;
/* sh_offset is the offset from the beginning of the file to
* beginning of data associated with this section.
*/
uint32_t sh_offset;
/* sh_size provides the total size of the section data in bytes.
* If the section holds a table of fixed sized entries, then
* sh_size be equal to sh_entsize times the number of entries.
*/
uint32_t sh_size;
};
typedef struct poff_sectionhdr_s poff_sectionhdr_t;
/* Structures which may appear as arrays in sections */
/* Relocation data section array entry structure */
struct poff_relocation_s
{
/* This value includes the symbol table index plus the
* relocation type. See the RLI_* macros above.
*/
uint32_t rl_info;
/* This is the section data offset to the instruction/data
* to be relocated. The effected section is implicit in the
* relocation type.
*/
uint32_t rl_offset; /* Offset to pcode */
};
typedef struct poff_relocation_s poff_relocation_t;
/* Symbol section array entry structure */
struct poff_symbol_s
{
/* st_type is the type of symbol described by this entry.
* See the STT_ definitions above.
*/
uint8_t st_type;
/* For data section symbols, the following provides the required
* data space alignment for the symbol memory representation. For
* procedures and functions, this value is ignored. See the STT_
* definitions above.
*/
uint8_t st_align;
/* These flags describe the characteristics of the symbol. See the
* STF_ definitions above.
*/
uint8_t st_flags;
uint8_t st_pad;
/* st_name is an offset into the string table section data.
* It refers to a name associated with symbol.
*/
uint32_t st_name;
/* st_value is the value associated with symbol. For defined data
* section symbols, this is the offset into the initialized data
* section data; for defined procedures and functions, this the
* offset into program section data. For undefined symbols, this
* valid can be used as as addend.
*/
uint32_t st_value;
/* For data section symbols, this is the size of the initialized
* data region associated with the symbol.
*/
uint32_t st_size;
};
typedef struct poff_symbol_s poff_symbol_t;
/* The file table section just consists of a list of offsets
* into the string table. The file table index is used elsewhere
* (such as in the line number array) to refer to a specific
* file.
*/
typedef uint32_t poffFileTab_t;
/* Line number section array entry structure. Line numbers are
* associated with executable program data sections.
*/
struct poff_linenumber_s
{
/* This is the source file line number */
uint16_t ln_lineno;
/* This is an index (not a byte offset) to an entry in the file
* section table. This can be used to identify the name of the
* file for which the line number applies.
*/
uint16_t ln_fileno;
/* This is an offset to the beginning of the instruction in the
* program data section. At present, this is limited to a single
* program data section.
*/
uint32_t ln_poffset;
};
typedef struct poff_linenumber_s poff_linenumber_t;
/* The debug info section consists of a list of poffDebugFuncInfo_t
* entries, each following a sublist of poffDebugArgInfo_t entries.
*/
/* poffDebugFuncInfo_t provides description of function input
* parameters and return values.
*/
struct poff_debugfuncinfo_s
{
/* This is the address or label of the function/procedure entry
* point.
*/
uint32_t df_value;
/* This is the size of the value returned by the function in
* bytes (zero for procedures).
*/
uint32_t df_size;
/* This is the number of parameters accepted by the function/
* procedure.
*/
uint32_t df_nparms;
};
typedef struct poff_debugfuncinfo_s poff_debugfuncinfo_t;
/* poffDebugArgInfo_t provides description of one function input
* parameter.
*/
struct poff_debugarginfo_s
{
/* This is the size, in bytes, of one input parameter */
uint32_t da_size;
};
typedef struct poff_debugarginfo_s poff_debugarginfo_t;
#endif /* __INCLUDE_NUXX_POFF_H */
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